WO2024037265A1 - 插针式超声波分体式焊头及其超声波焊机 - Google Patents

插针式超声波分体式焊头及其超声波焊机 Download PDF

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Publication number
WO2024037265A1
WO2024037265A1 PCT/CN2023/107633 CN2023107633W WO2024037265A1 WO 2024037265 A1 WO2024037265 A1 WO 2024037265A1 CN 2023107633 W CN2023107633 W CN 2023107633W WO 2024037265 A1 WO2024037265 A1 WO 2024037265A1
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Prior art keywords
welding
pin
cylindrical
needle
split
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PCT/CN2023/107633
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English (en)
French (fr)
Inventor
夏祖荣
韩子锋
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深圳市华普森科技有限公司
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Priority claimed from CN202222159673.4U external-priority patent/CN217859310U/zh
Priority claimed from CN202222175963.8U external-priority patent/CN217859311U/zh
Application filed by 深圳市华普森科技有限公司 filed Critical 深圳市华普森科技有限公司
Publication of WO2024037265A1 publication Critical patent/WO2024037265A1/zh

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    • 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
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/10—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating making use of vibrations, e.g. ultrasonic welding

Definitions

  • the present invention relates to the technical field of ultrasonic welding, specifically a pin-type ultrasonic split welding head and its ultrasonic welding machine; the ultrasonic welding head and its ultrasonic welding machine in the present invention are particularly suitable for cylindrical batteries with a length of greater than or equal to 80 mm and less than or equal to 200mm, the inner diameter of the center hole of the battery core is less than or equal to 10mm and is greater than or equal to 2mm. Welding of electrodes and battery metal shells of slender batteries.
  • cylindrical battery 46800 diameter 46mm, height 80mm
  • cylindrical battery 46157 diameter 46mm, height 157mm
  • the diameter of the center hole of the battery core is as small as possible, hoping to be as small as less than 5mm , preferably a hole diameter of 2mm-5mm, which poses new challenges to the welding between the tabs and the steel shell of the cylindrical battery.
  • the first is resistance welding
  • the second is laser welding
  • the third is ultrasonic welding; for Resistance welding requires a certain internal resistance between the battery's tabs and the steel shell before the two can be welded. Therefore, batteries welded by resistance welding generally have a larger internal resistance, and the battery will generate heat when used.
  • nickel tabs, steel tabs or stainless steel tabs are generally used. The cost of such tabs is relatively high; there are also the following problems for laser welding.
  • the welding temperature is high. If welded inside the core hole, it is easy to produce spatter, and the spatter cannot be detected, posing safety risks to the battery.
  • this kind of composite vibration ultrasonic welding machine is easy to pry the outer end of the battery lug upward during welding, and the electrode cannot be reached.
  • the welding part of the lug is all attached to the inner bottom surface of the steel shell, and there is a risk of the lug electrode falling off; secondly, due to the existence of the force arm, the welding head of this kind of composite vibration ultrasonic welding machine cannot use a long and thin welding head at all.
  • this kind of welding head is very easy to break when used on a composite vibration ultrasonic welding machine; therefore, the welding head of this kind of composite vibration ultrasonic welding machine generally has the upper diameter of the welding head much larger than the lower diameter of the welding head. Even so, its The lower part of the welding head cannot be made too long, otherwise the welding needle at the lower part will easily break; the ring vibration ultrasonic welding machine is represented by the Swiss torque welding machine, which uses the reverse synchronous drive method of two transducers for welding.
  • the amplitude of this kind of welding machine is symmetrically distributed relative to the sonopole axis. The amplitude in the center of the axis is zero, and the amplitude is the largest at the edge.
  • the outer ring of the twisted welding has a large energy, and the energy reaches the center of the middle circle. The smaller it is, even the energy at the center is zero, which means that workpieces with small diameters are not easy to weld, and it is easy to cut off the tabs on the outer edge of the welding needle.
  • the purpose of the present invention is to provide a pin-type ultrasonic split welding head to solve the problems raised in the above background technology.
  • Another object of the present invention is to provide a cylindrical battery fine hole needle ultrasonic welding machine.
  • a pin-type ultrasonic split welding head including a coupling rod, a cylindrical hole is provided inside the main body of the coupling rod, a welding pin is provided at the bottom of the coupling rod, and the welding pin is
  • the tail of the needle is provided with a cylindrical shaft, the cylindrical shaft is connected to the cylindrical hole, and the head of the welding needle is provided with a welding surface.
  • the cylindrical shaft and the surface of the cylindrical hole cooperate with each other.
  • a slit is provided from the inside of the cylindrical hole to bisect the cylindrical hole and the lower part of the coupling rod, and the elasticity of the lower part of the coupling rod can be used to pass the cylindrical hole to the cylindrical shaft. Clamp or loosen.
  • the welding pins can undergo corresponding heat treatment according to different materials.
  • the frequency of the coupling rod and welding pin can be designed according to the oscillation frequency of the transducer.
  • the welding needle includes a cylindrical shaft and a welding needle shaft located on the lower side of the cylindrical shaft and coaxial with the cylindrical shaft.
  • the cylindrical shaft and the welding needle shaft are an integral structure, and the welding surface Located on the underside of the solder pin stem.
  • the diameter of the cylindrical shaft is greater than or equal to the diameter of the welding pin rod, and the welding pin rod is cylindrical.
  • the ratio of the length to the diameter of the welding pin rod is selected between 15-50.
  • the invention also provides a cylindrical battery fine-hole needle ultrasonic welding machine, which includes the above-mentioned pin-type ultrasonic split welding head.
  • the invention also provides a cylindrical battery fine-hole needle ultrasonic welding machine, which includes a welding machine transducer, and one end of the welding machine transducer is connected to a horn;
  • a split welding head is connected to the inner side of the horn through bolts;
  • the split welding head is composed of a welding pin and a coupling rod, and the tail end of the coupling rod is connected to the tail end of the welding pin;
  • the bottom of the welding pin can weld the inside of the battery body.
  • the vibration energy of the coupling rod comes from the transducer of the ultrasonic welding machine
  • the vibration energy of the welding pin originates from the coupling rod.
  • the welding pin includes a cylindrical shaft and a welding needle shaft.
  • the welding needle shaft is located on the lower side of the cylindrical shaft and is coaxial with the cylindrical shaft.
  • the cylindrical shaft and the welding needle shaft are integrated. structure, the welding surface is located on the bottom surface of the welding pin rod.
  • the diameter of the cylindrical shaft is greater than or equal to the diameter of the welding pin rod, and the welding pin rod is cylindrical.
  • the ratio of the length to the diameter of the welding pin rod is selected between 15-50.
  • the cylindrical shaft and the surface of the cylindrical hole cooperate with each other.
  • a slit is provided starting from the cylindrical hole and dividing the cylindrical hole and the lower part of the coupling rod into two parts.
  • the elasticity of the lower part of the coupling rod can be used to clamp the cylindrical shaft through the cylindrical hole. Tighten or loosen.
  • the split welding head can weld at least one layer of 0.1mm thick copper or aluminum sheet to the bottom of the battery case; or at least one layer of copper foil or aluminum foil to the bottom of the battery case.
  • the sonotrode axis of the welding needle is perpendicular to and intersects with the central axis of the transducer and horn of the welding machine.
  • the pin type ultrasonic split welding head in the present invention can use a clamping coupling rod to connect the welding pins into one body, and the welding pin rods adopt a structure with the overall diameters being basically equal (except for the allowable tolerance). Therefore, this
  • the pin-type ultrasonic split welding head invented has a welding pin that is not easy to break at high frequencies and is easy to replace.
  • the ultrasonic welder of the present invention does not have a force-applying arm. Therefore, the ultrasonic welder of the present invention will not cause the outer ends of the battery tabs to lift up during welding, and can make the The welding part of the tab completely fits on the inner bottom surface of the steel shell, and there is no risk of the tab falling off; since there is no force arm, the welding pin of the present invention can be designed to be long and thin, and there is no risk of the welding pin breaking.
  • the present invention does not require the reverse synchronous driving of two transducers, and only needs one transducer to vibrate horizontally, which can reduce costs and is also suitable for welding workpieces with small diameters, and welding The needle is not easy to break.
  • Figure 1 is a schematic diagram of the exploded structure of the split welding head of the present invention.
  • Figure 2 is a schematic diagram of the overall planar structure of the ultrasonic machine of the present invention.
  • FIG. 3 is a schematic three-dimensional exploded structural diagram of FIG. 2 .
  • FIG. 4 is a schematic structural diagram of the coupling rod in FIG. 3 from another perspective.
  • Figure 5 is a schematic diagram of the connection relationship between the split welding head and the battery in the present invention.
  • Figure 1 reveals a pin-type ultrasonic split welding head, including a pin-type ultrasonic split welding head, including a coupling rod 31.
  • the main body of the coupling rod 31 is provided with a cylindrical hole 10.
  • a welding pin 30 is provided at the bottom of the rod 31, and a cylindrical shaft 20 is fixed at the tail of the welding needle 30.
  • the cylindrical shaft 20 is connected to the cylindrical hole 10.
  • the slit 11 is divided into two, and the elasticity of the lower part of the coupling rod 31 can be used to clamp or loosen the cylindrical shaft 20 through the cylindrical hole 10 .
  • the surfaces of the cylindrical shaft 20 and the cylindrical hole 10 cooperate with each other to ensure that after the surface of the cylindrical shaft 20 hits the cylindrical hole 10 inside the coupling rod 31, the horns on both sides can be locked under the action of the slit 11 to achieve fixation.
  • the vibration energy of the coupling rod 31 comes from the ultrasonic transducer, or a transducer equipped with a horn, and the vibration energy of the welding pin 30 comes from the coupling rod 31, so that the first ultrasonic main coupling rod can
  • the tail end of the needle is transferred to the welding surface 21 of the head of the soldering needle 30 to weld the battery.
  • the welding pin 30 is a consumable product and can be heat treated according to different materials during use.
  • the requirements for using the natural frequencies of the coupling rod 31 and the welding pin 30 can be designed according to the oscillation frequency of the transducer.
  • the welding needle 30 includes a cylindrical shaft 20 and a welding needle rod 40 located on the lower side of the cylindrical shaft 20 and coaxial with the cylindrical shaft 20.
  • the cylindrical shaft 20 and the welding needle rod 40 are In an integrated structure, the welding surface 21 is located on the bottom surface of the welding pin bar 40 . Since the diameter of the welding pin rod 40 is basically the same from top to bottom, the amplitude ratio of the welding pin rod 40 is small during the vibration process. Therefore, the welding pin rod 40 of the present invention is not easy to break during use, and greatly improves the The service life of the split welding head.
  • the welding pin 30 and the coupling rod 31 are clamped, so that the welding pin 30 can be easily replaced.
  • the diameter of the cylindrical shaft 20 may be equal to the diameter of the welding pin rod 40, or the diameter of the cylindrical shaft 20 may be greater than the diameter of the welding pin rod 40.
  • the reason why the cylinder is designed is The diameter of the shaft 20 is larger than the diameter of the welding pin rod 40 because the diameter of the cylindrical shaft 20 and the diameter of the cylindrical hole 10 must be equal. In this way, the versatility of the coupling rod 31 can be improved, and the coupling rod 31 can be suitable for different diameters. Solder pin 30 is used.
  • the welding pin bar 40 is cylindrical.
  • the ratio of the length to the diameter of the welding pin rod 40 is selected between 15-50.
  • the length of the welding pin bar 40 can be selected between 30 mm and 100 mm.
  • the length of the welding pin bar 40 can be selected between 45 mm and 150 mm.
  • the length of the welding pin bar 40 can be selected between 60 mm and 200 mm.
  • the length of the welding pin bar 40 can be selected between 75 mm and 250 mm.
  • the ratio of the length to diameter of the welding pin rod 40 can also be selected between 20-50, between 25-50, between 30-50, between 35-50, between 40 Choose between -50 or choose between 45-50.
  • the invention also provides a cylindrical battery fine-hole needle ultrasonic welding machine, which includes the above-mentioned pin-type ultrasonic split welding head.
  • the present invention also provides a cylindrical battery fine-hole needle ultrasonic welding machine, including a cylindrical battery fine-hole needle ultrasonic welding machine, including a welding machine transducer 1, and a welding machine transducer 1.
  • a cylindrical battery fine-hole needle ultrasonic welding machine including a welding machine transducer 1, and a welding machine transducer 1.
  • One end of the transducer 1 is fixedly connected with the horn 2, and the transducer 1 and horn 2 of the welding machine are fixed on the existing welding machine base.
  • the battery can be placed on the welding machine base, and then the equipment Weld the deep hole inside the battery; the vibration frequency of the welding machine transducer 1 can be selected between 35kHz-60kH.
  • Cylindrical batteries in the present invention include cylindrical lithium batteries, cylindrical sodium batteries, and the like.
  • the split welding head 3 is connected to the inner side of the horn 2 through bolts 33;
  • the split welding head 3 is composed of a welding pin 30 and a coupling rod 31, and the tail end of the coupling rod 31 is plugged and connected with the tail end of the welding pin 30;
  • the welding pin 30 can weld the inside of the battery body. When used, the bottom of the welding pin 30 can be inserted into the bottom of the hole in the battery core for welding.
  • the horn 2 includes a first horn 23 and a second horn 24. The first horn 23 and the second horn 24 are connected by bolts 33, and the split type The cylindrical shaft 20 of the welding head 3 is clamped through the cylindrical hole 10 .
  • the vibration energy source of the coupling rod 31 is from the ultrasonic welding machine transducer 1 or the ultrasonic transducer equipped with the horn 2.
  • the vibration energy of the welding pin 30 is from the coupling rod 31.
  • the ultrasonic welding machine transducer 1 can convert the electromagnetic signal into a mechanical vibration signal, and amplify the mechanical vibration signal through the horn 2 and transmit it to the coupling rod 31.
  • the coupling rod 31 converts the mechanical vibration signal from a horizontal signal to a vertical signal and then transmits it to the welding pin 30 , the bottom of the welding pin 30 can be inserted into the bottom of the hole in the battery core to weld the tabs of the battery to the inner bottom surface of the steel shell.
  • the split welding head 3 can weld at least one layer of 0.1mm thick copper or aluminum sheets to the bottom of the battery case (for example, 1-5 layers of 0.1mm thick copper or aluminum sheets); or at least one layer of copper foil or aluminum foil Welded on the bottom of the battery case (for example, 1-50 layers of 0.008mm thick copper foil or aluminum foil), the actual welding area diameter can reach 4 mm. Compared with the traditional resistance welding surface diameter is not more than 1.5 mm, the area is 5 to 8 times; and the tabs of the cylindrical battery can be directly made of pure metal sheets, such as copper sheets or aluminum sheets, whose internal resistance is very small, which is the bottleneck of battery charging and discharging. This invention can greatly improve the battery charging and discharging capacity and improve safety. , greatly reducing battery internal consumption and improving cycle life.
  • the welding needle 30 includes a cylindrical shaft 20 and a welding needle shaft 40.
  • the welding needle shaft 40 is located on the lower side of the cylindrical shaft 20 and is coaxial with the cylindrical shaft 20.
  • the welding pin bar 40 has an integrated structure, and the welding surface 21 is located on the bottom surface of the welding pin bar 40 .
  • the diameter of the cylindrical shaft 20 is greater than or equal to the diameter of the welding pin rod 40, and the welding pin rod 40 is cylindrical. Since the present invention adopts a clamping coupling rod structure on the one hand, and a welding rod on the other hand,
  • the overall diameter of the pin bar is basically the same, that is to say, the overall diameter of the welding pin bar changes little. In this way, when high-frequency vibration occurs, concentrated stress will not be generated, and the problem of welding pin bar breakage will not occur easily.
  • the ratio of the length to the diameter of the welding pin bar 40 is selected between 15-50.
  • the length of the welding pin bar 40 can be selected between 30 mm and 100 mm.
  • the length of the welding pin bar 40 can be selected between 45 mm and 150 mm.
  • the length of the welding pin bar 40 can be selected between 60 mm and 200 mm.
  • the length of the welding pin bar 40 can be selected between 75 mm and 250 mm.
  • the ratio of the length to diameter of the welding pin rod 40 can also be selected between 20-50, between 25-50, between 30-50, between 35-50, between 40 Choose between -50 or choose between 45-50.
  • the cylindrical shaft 20 and the surface of the cylindrical hole 10 cooperate with each other.
  • the cylindrical shaft 20 is clamped or loosened.
  • the split welding head 3 can weld at least one layer of 0.1mm thick copper sheet or aluminum sheet to the bottom of the battery case.
  • the sonotrode axis 50 of the welding pin 30 is perpendicular to and intersects with the central axis 22 of the welding machine transducer 1 and the horn 2.
  • Such a design can achieve zero force arm and further reduce the number of welding pins. Breakage of rod 40.
  • the split welding head 3 is different from the traditional one-piece welding head. It is specially designed for deep hole pin welding.
  • the aperture of the battery core is 3.5 mm, which can achieve 125 mm depth of welding.
  • the aperture of the battery core is 4.5 mm, which can also achieve 130 mm depth. Deep welding.
  • the ultrasonic energy is transmitted to the coupling rod 31 through the transducer and the horn 2, and is transmitted to the welding pin 30 through the lower end of the coupling rod 31.
  • the welding pin 30 transmits the ultrasonic energy to the welding pin 30.
  • the deep hole of the battery 4 can be welded.
  • this ultrasonic welding machine uses a split pin-type ultrasonic welding head, and only needs to replace 30 parts of the welding pin, so it saves 50% of the use cost and 50% of the replacement time, and is more convenient to use.

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  • Mechanical Engineering (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)

Abstract

一种插针式超声波分体式焊头及其超声波焊机，其中，超声波焊机包括焊接机换能器，所述焊接机换能器一端连接有变幅杆；所述变幅杆内侧通过螺栓连接有分体式焊头；所述分体式焊头由焊针和耦合杆组成，所述耦合杆尾端与焊针的尾端连接；所述焊针底部可对电池本体内部进行焊接。本发明具有焊针不易断裂，以及更换方便的优点。

Description

插针式超声波分体式焊头及其超声波焊机 技术领域
本申请是以中国专利申请号202222175963.8，申请日2022年8月16日，名称为一种插针式超声波分体式焊头，以及中国专利申请号 202222159673.4，申请日2022年8月16日，名称为一种圆柱形电池细孔穿针超声波焊接机为优先权所提出的。
本发明涉及超声波焊接技术领域，具体为一种插针式超声波分体式焊头及其超声波焊机；本发明中的超声波焊头及其超声波焊机特别适合于圆柱形电池长度大于等于80mm小于等于200mm,电池卷芯的中心孔内径小于等于10mm大于等于2mm的细长型电池的电极与电池金属外壳的焊接。
 背景技术
随着新能源汽车的发展，对单体圆柱形电池的容量要求越来越大，这样使得圆柱形电池的直径和高度变得越来越大，用于新能源汽车的圆柱形电池已从最初的18650（直径18mm,高度65mm）变成了目前市场上的主流的圆柱形电池21700（直径21mm,高度70mm），但是，随着新能源汽车的进一步发展，人们提出了圆柱形电池46800（直径46mm,高度80mm），以及圆柱形电池46157（直径46mm,高度157mm）；为了进一步提高圆柱形电池的容量，人们希望电池卷芯的中心孔的直径是越小越好，希望能小到5mm以下，最好是2mm-5mm的孔径，这对圆柱形电池的极耳与钢壳之间的焊接提出了新的挑战。目前，用于这种又长又细的圆柱形电池电极与钢壳之间的焊接方法主要有三种方式，第一种是电阻焊，第二种是激光焊，第三种是超声焊；对于电阻焊它需要电池的极耳与钢壳之间有一定的内阻才可以将两者焊接，因此，用电阻焊焊接出来的电池，一般内阻都较大，电池在使用时会产生热量，另外，为了增加极耳与钢壳之间的内阻一般都选用镍极耳、钢极耳或不锈钢极耳，这种极耳的成本较高；对于激光焊也存在下述问题，激光焊的焊接温度较高，如果卷芯孔内焊接，容易产生飞溅物，且飞溅物无法检测给电池埋下安全隐患，这是最致命的弱点；如果从电池钢壳外面焊接，焊接位置精度难以掌握，以及焊接后的排出空气不好解决，另外，从电池钢壳外面焊接，容易将钢壳外的镀镍层破坏，造成电池外壳生锈等问题；对于超声焊，市面上常见的用于圆柱形电池焊接的机型主要有复合振超声焊机和环振超声焊机，复合振超声焊机以日本的椭圆焊机为代表，这种超声波焊机由于其加压机构的作用力位于换能器与焊头（即上声极）之间的变幅杆上，存在一个施力臂，因此，这种复合振超声焊机容易在焊接时使电池极耳外端上撬，达不到将极耳的焊接部分全部贴合在钢壳的内底面，存在耳极脱落的风险；二是由于施力臂的存在这种复合振超声焊机的焊头，根本不能采用又长又细的焊头，这种焊头在复合振超声焊机上使用非常容易断裂；所以，这种复合振超声焊机的焊头一般是焊头的上部直径远远大于焊头的下部直径，即使是这样，其焊头的下部也不能做的太长,否则其下部的焊针也容易断裂；环振超声焊机以瑞士扭矩焊机为代表，它是采用两个换能器的反向同步驱动方式进行焊接的，这种焊机的振幅是相对于声极轴线呈对称分布的，其轴心区振幅为零，边缘位置振幅最大，也就是说，扭曲焊的外圈能量大，越到中间圆心处能量越小，甚至最中心处能量为零，这就意味着直径小的工件不好焊，并且容易切断焊针外缘的极耳。
 技术问题
本发明的目的在于提供一种插针式超声波分体式焊头，以解决上述背景技术中提出的问题。
         本发明的另一个目的在于提供一种圆柱形电池细孔穿针超声波焊接机。
 技术解决方案
为实现上述目的，本发明提供如下技术方案：一种插针式超声波分体式焊头，包括耦合杆，所述耦合杆主体内部设置有圆柱孔，所述耦合杆底部设置有焊针，且焊针尾部设置有圆柱轴，所述圆柱轴与圆柱孔连接，所述焊针头部设置有焊接面。
优选的，所述圆柱轴与圆柱孔的面相互配合。
优选的，从所述圆柱孔内部开始设置有将所述圆柱孔和耦合杆的下部一分为二的开缝，利用所述耦合杆的下部的弹性通过所述圆柱孔能将所述圆柱轴夹紧或松开。
优选的，所述焊针可根据不同的材料做相应的热处理。
优选的，所述耦合杆和焊针频率可根据换能器的震荡频率进行设计。
优选的，所述焊针包括圆柱轴和位于所述圆柱轴下侧的与所述圆柱轴同轴的焊针杆，所述圆柱轴与所述焊针杆为一体式结构，所述焊接面位于焊针杆的底面。
优选的，所述圆柱轴的直径大于或等于所述焊针杆的直径，所述焊针杆为圆柱形。
优选的，所述焊针杆的长度与直径之比在15-50之间选择。
本发明还提供一种圆柱形电池细孔穿针超声波焊接机，包含有上述的插针式超声波分体式焊头。
本发明还提供一种圆柱形电池细孔穿针超声波焊接机，包括焊接机换能器，所述焊接机换能器一端连接有变幅杆；
所述变幅杆内侧通过螺栓连接有分体式焊头；
所述分体式焊头由焊针和耦合杆组成，所述耦合杆尾端与焊针的尾端连接；
所述焊针底部可对电池本体内部进行焊接。
优选的，所述耦合杆的振动能量来源于超声波焊接机换能器；
所述焊针的振动能量来源于耦合杆。
优选的，所述焊针包括圆柱轴和焊针杆，所述焊针杆位于所述圆柱轴下侧，并与所述圆柱轴同轴，所述圆柱轴与所述焊针杆为一体式结构，所述焊接面位于焊针杆的底面。
优选的，所述圆柱轴的直径大于或等于所述焊针杆的直径，所述焊针杆为圆柱形。
优选的，所述焊针杆的长度与直径之比在15-50之间选择。
优选的，所述圆柱轴与圆柱孔的面相互配合。
优选的，从所述圆柱孔开始设有将所述圆柱孔和耦合杆的下部一分为二的开缝，利用所述耦合杆的下部的弹性通过所述圆柱孔能将所述圆柱轴夹紧或松开。
优选的，所述分体式焊头可将至少一层0.1mm厚的铜片或铝片焊接在电池壳体底部；或者至少一层铜箔或铝箔焊接在电池壳体底部。
优选的，所述焊针的声极轴线垂直并相交于所述焊接机换能器和变幅杆的中轴线。
 有益效果
本发明中的插针式超声波分体式焊头可以采用夹紧式耦合杆将焊针连为一体，并且所述焊针杆采用整体直径基本相等（除允许的公差外）的结构，所以，本发明的插针式超声波分体式焊头在高频时，其焊针不易断裂，且更换方便。
本发明超声音波焊机，与复合振超声焊机相比，由于不存在施力臂，因此，本发明的超声焊机不会在焊接时使电池极耳外端出现上撬的问题，可使极耳的焊接部分完全贴合在钢壳的内底面上，不存在耳极脱落的风险；由于没有施力臂本发明的焊针可以设计的又长又细，也不会出焊针断裂的问题；相对于扭矩焊机，本发明不需两个换能器的反向同步驱动，只需一个换能器水平振动即可，即可降低成本，也适合于直径小的工件焊接，并且焊针不易断裂。
 附图说明
图1为本发明分体式焊头分解结构示意图。
图2为本发明超声波机的整体平面结构示意图。
图3为图2的立体分解结构示意图。
图4为图3中的耦合杆的另一视角的结构示意图。
图5为本发明中分体式焊头与电池的连接关系示意图。
 本发明的最佳实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
请参阅图1，图1揭示的是一种插针式超声波分体式焊头，包括一种插针式超声波分体式焊头，包括耦合杆31，耦合杆31主体内部设置有圆柱孔10，耦合杆31底部设置有焊针30，且焊针30尾部固定有圆柱轴20，圆柱轴20与圆柱孔10连接，从所述圆柱孔10开始设有将所述圆柱孔10和耦合杆31的下部一分为二的开缝11，利用所述耦合杆31的下部的弹性通过所述圆柱孔10能将所述圆柱轴20夹紧或松开。
圆柱轴20与圆柱孔10的面相互配合，保证圆柱轴20面顶到耦合杆31内部的圆柱孔10后，在开缝11的作用下便于两边变幅杆锁紧，实现固定。
在使用的时候，耦合杆31的振动能量来源于超声波换能器，或装有变幅杆的换能器，焊针30的振动能量来源于耦合杆31，从而可以从第一超声波主要耦合杆的针尾端传递到焊针30头部的焊接面21上实现对电池进行焊接。
焊针30是消耗品，在使用的时候可根据不同的材料做相应的热处理。
耦合杆31和焊针30使用固有频率的要求可根据换能器的震荡频率进行设计。
本发明中，所述焊针30包括圆柱轴20和位于所述圆柱轴20下侧的与所述圆柱轴20同轴的焊针杆40，所述圆柱轴20与所述焊针杆40为一体式结构，所述焊接面21位于焊针杆40的底面。由于所述焊针杆40的直径从上至下基本相等，焊针杆40在振动的过程中变幅比小，因此，本发明的焊针杆40在使用过程中不易断裂，大大地提高的分体式焊头的使用寿命。另外，所述焊针30与所述耦合杆31采用夹接的方式，这样，方便更换所述焊针30。
本发明中，所述圆柱轴20的直径可以是等于所述焊针杆40的直径，也可以是所述圆柱轴20的直径大于所述焊针杆40的直径，之所以设计成所述圆柱轴20的直径大于所述焊针杆40的直径，是因为要满足圆柱轴20直径与圆柱孔10的直径相等，这样，可以提高耦合杆31的通用性，可以耦合杆31适合于不同直径的焊针30使用。
本发明中，所述焊针杆40为圆柱形。
本发明中，所述焊针杆40的长度与直径之比在15-50之间选择。
例如，当所述焊针杆40为2mm时，所述焊针杆40的长度可以在30mm-100mm之间选择。
当所述焊针杆40为3mm时，所述焊针杆40的长度可以在45mm-150mm之间选择。
当所述焊针杆40为4mm时，所述焊针杆40的长度可以在60mm-200mm之间选择。
当所述焊针杆40为5mm时，所述焊针杆40的长度可以在75mm-250mm之间选择。
当然，所述焊针杆40的长度与直径之比也可以在20-50之间选择、在25-50之间选择、在30-50之间选择、在35-50之间选择、在40-50之间选择或在45-50之间选择。
本发明还提供一种圆柱形电池细孔穿针超声波焊接机，包含有上述的插针式超声波分体式焊头。
请参阅图2-5，本发明还提供一种圆柱形电池细孔穿针超声波焊接机，包括一种圆柱形电池细孔穿针超声波焊接机，包括焊接机换能器1，焊接机换能器1一端固定连接有变幅杆2，且设置的焊接机换能器1和变幅杆2固定在现有的焊接机座上，工作的时候可以将电池放置到焊接机座上，然后设备对电池内部的深孔进行焊接；焊接机换能器1的振动频率可以在35kHz-60kH之间选择。本发明中的圆柱形电池包括圆柱形锂电池和圆柱形钠电池等。
变幅杆2内侧通过螺栓33连接有分体式焊头3；
分体式焊头3由焊针30和耦合杆31组成，耦合杆31尾端与焊针30的尾端插合连接；
焊针30可对电池本体内部进行焊接，使用的时候，焊针30底部可以插入到电池卷芯中孔底部进行焊接。本实施例中，所述变幅杆2包括第一变幅杆23和第二变幅杆24，所述第一变幅杆23和第二变幅杆24通过螺栓33连接，并将分体式焊头3的圆柱轴20通过圆柱孔10夹紧。
耦合杆31的振动能量来源与超声波焊接机换能器1或者装有变幅杆2的超声波换能器，焊针30的振动能量来源于耦合杆31，在使用的时候超声波焊接机换能器1可以将电磁信号转换成机械振动信号，并且通过变幅杆2将机械振动信号放大传输给耦合杆31，耦合杆31将机械振动信号由水平信号转为竖直信号后再传输给焊针30，焊针30底部可以插入到电池卷芯中孔底部对电池的极耳与钢壳的内底面进行焊接。
分体式焊头3可将至少一层0.1mm厚的铜片或铝片焊接在电池壳体底部（例如1-5层0.1mm厚的铜片或铝片）；或者至少一层铜箔或铝箔焊接在电池壳体底部（例如，1-50层0.008mm厚的铜箔或铝箔），实际焊接面积直径能达到4毫米，相比传统电阻焊接面直径不大于1.5毫米，面积是原来的5到8倍；并且圆柱形电池的极耳可以直接用纯金属片，如铜片或铝片，其内阻非常小，这是电池充放电瓶颈，本发明能大大提高电池充放电能力，提高安全性，大大减少电池内耗，并提高循环寿命。
优选的，所述焊针30包括圆柱轴20和焊针杆40，所述焊针杆40位于所述圆柱轴20下侧，并与所述圆柱轴20同轴，所述圆柱轴20与所述焊针杆40为一体式结构，所述焊接面21位于焊针杆40的底面。
优选的，所述圆柱轴20的直径大于或等于所述焊针杆40的直径，所述焊针杆40为圆柱形，由于本发明一方面采用夹紧式耦合杆结构，另一方面采用焊针杆的整体直径基本相等，也就是说，焊针杆的整体直径变化小，这样，在高频振动时，不会产生集中应力，也就不容易出来焊针杆断裂的问题。
优选的，所述焊针杆40的长度与直径之比在15-50之间选择。
例如，当所述焊针杆40为2mm时，所述焊针杆40的长度可以在30mm-100mm之间选择。
当所述焊针杆40为3mm时，所述焊针杆40的长度可以在45mm-150mm之间选择。
当所述焊针杆40为4mm时，所述焊针杆40的长度可以在60mm-200mm之间选择。
当所述焊针杆40为5mm时，所述焊针杆40的长度可以在75mm-250mm之间选择。
当然，所述焊针杆40的长度与直径之比也可以在20-50之间选择、在25-50之间选择、在30-50之间选择、在35-50之间选择、在40-50之间选择或在45-50之间选择。
优选的，所述圆柱轴20与圆柱孔10的面相互配合。
优选的，从所述圆柱孔10开始设有将所述圆柱孔10和耦合杆31的下部一分为二的开缝11，利用所述耦合杆31的下部的弹性通过所述圆柱孔10能将所述圆柱轴20夹紧或松开。
优选的，所述分体式焊头3可将至少一层0.1mm厚的铜片或铝片焊接在电池壳体底部。
优选的，所述焊针30的声极轴线50垂直并相交于所述焊接机换能器1和变幅杆2的中轴线22，如此设计，可以实现零力臂，更加减少所述焊针杆40的断裂。
分体式焊头3不同于传统的一体式焊头，专门针对深孔插针焊接，电池卷芯的孔径3.5毫米，可实现125毫米深度的焊接，电池卷芯的孔径4.5毫米也可实现 130毫米深度的焊接。
在使用的时候，超声波的能量通过换能器和变幅杆2传输到耦合杆31上，在通过耦合杆31最下端传输到焊针30，焊针30在把超声波能量传输到焊针30的最底部，从而可以实现对电池4的深孔的焊接。
且本超声波焊接机在使用的时候采用分体式插针式超声波焊头，只需要更换焊针30部分，所以省去50%的使用成本，省去50%的拆换时间，使用比较方便。
需要说明的是，在本文中，诸如第一和第二等之类的关系术语仅仅用来将一个实体或者操作与另一个实体或操作区分开来，而不一定要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺序。而且，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者设备所固有的要素。
尽管已经示出和描述了本发明的实施例，对于本领域的普通技术人员而言，可以理解在不脱离本发明的原理和精神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，本发明的范围由所附权利要求及其等同物限定。
本发明的实施方式
在此处键入本发明的实施方式描述段落。
 工业实用性
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Claims (18)

  1. 一种插针式超声波分体式焊头（3），其特征在于：包括耦合杆（31），所述耦合杆（31）主体内部设置有圆柱孔（10），所述耦合杆（31）底部设置有焊针（30），且焊针（30）尾部设置有圆柱轴（20），所述圆柱轴（20）与圆柱孔（10）连接，所述焊针（30）头部设置有焊接面（21）。
  2. 根据权利要求1所述的一种插针式超声波分体式焊头，其特征在于：所述圆柱轴（20）与圆柱孔（10）的面相互配合。
  3. 根据权利要求1所述的一种插针式超声波分体式焊头，其特征在于：从所述圆柱孔（10）开始设有将所述圆柱孔（10）和耦合杆（31）的下部一分为二的开缝（11），利用所述耦合杆（31）的下部的弹性通过所述圆柱孔（10）能将所述圆柱轴（20）夹紧或松开。
  4. 根据权利要求1所述的一种插针式超声波分体式焊头，其特征在于：所述焊针（30）可根据不同的材料做相应的热处理。
  5. 根据权利要求1所述的一种插针式超声波分体式焊头，其特征在于：所述耦合杆（31）和焊针（30）频率可根据换能器的震荡频率进行设计。
  6. 根据权利要求1所述的一种插针式超声波分体式焊头，其特征在于：所述焊针（30）包括圆柱轴（20）和位于所述圆柱轴（20）下侧的与所述圆柱轴（20）同轴的焊针杆（40），所述圆柱轴（20）与所述焊针杆（40）为一体式结构，所述焊接面（21）位于焊针杆（40）的底面。
  7. 根据权利要求6所述的一种插针式超声波分体式焊头，其特征在于：所述圆柱轴（20）的直径大于或等于所述焊针杆（40）的直径，所述焊针杆（40）为圆柱形。
  8. 根据权利要求6或7所述的一种插针式超声波分体式焊头，其特征在于：所述焊针杆（40）的长度与直径之比在15-50之间选择。
  9.  一种圆柱形电池细孔穿针超声波焊接机，其特征在于：包含有权利要求1-8中任一项所述的插针式超声波分体式焊头。
  10. 一种圆柱形电池细孔穿针超声波焊接机，包括焊接机换能器（1），其特征在于：所述焊接机换能器（1）一端连接有变幅杆（2）；
    所述变幅杆（2）内侧通过螺栓（33）连接有分体式焊头（3）；
    所述分体式焊头（3）由焊针（30）和耦合杆（31）组成，所述耦合杆（31）尾端与焊针（30）的尾端连接；
    所述焊针（30）底部可对电池本体内部进行焊接。
  11. 根据权利要求10所述的一种圆柱形电池细孔穿针超声波焊接机，其特征在于：所述耦合杆（31）的振动能量来源于超声波焊接机换能器（1）；
    所述焊针（30）的振动能量来源于耦合杆（31）。
  12.  根据权利要求10所述的一种插针式超声波分体式焊头，其特征在于：所述焊针（30）包括圆柱轴（20）和焊针杆（40），所述焊针杆（40）位于所述圆柱轴（20）下侧，并与所述圆柱轴（20）同轴，所述圆柱轴（20）与所述焊针杆（40）为一体式结构，所述焊接面（21）位于焊针杆（40）的底面。
  13. 根据权利要求12所述的一种插针式超声波分体式焊头，其特征在于：所述圆柱轴（20）的直径大于或等于所述焊针杆（40）的直径，所述焊针杆（40）为圆柱形。
  14.  根据权利要求11或12所述的一种插针式超声波分体式焊头，其特征在于：所述焊针杆（40）的长度与直径之比在15-50之间选择。
  15. 根据权利要求10所述的一种插针式超声波分体式焊头，其特征在于：所述圆柱轴（20）与圆柱孔（10）的面相互配合。
  16. 根据权利要求10所述的一种插针式超声波分体式焊头，其特征在于：从所述圆柱孔（10）开始设有将所述圆柱孔（10）和耦合杆（31）的下部一分为二的开缝（11），利用所述耦合杆（31）的下部的弹性通过所述圆柱孔（10）能将所述圆柱轴（20）夹紧或松开。
  17. 根据权利要求10所述的一种圆柱形电池细孔穿针超声波焊接机，其特征在于：所述分体式焊头（3）可将至少一层0.1mm厚的铜片或铝片焊接在电池壳体底部；或者至少一层铜箔或铝箔焊接在电池壳体底部。
  18.  根据权利要求10所述的一种圆柱形电池细孔穿针超声波焊接机，其特征在于：所述焊针（30）的声极轴线（50）垂直并相交于所述焊接机换能器（1）和变幅杆（2）的中轴线（22）。
PCT/CN2023/107633 2022-08-16 2023-07-17 插针式超声波分体式焊头及其超声波焊机 WO2024037265A1 (zh)

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