JP2013046917A - Welding equipment - Google Patents

Welding equipment Download PDF

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JP2013046917A
JP2013046917A JP2011185628A JP2011185628A JP2013046917A JP 2013046917 A JP2013046917 A JP 2013046917A JP 2011185628 A JP2011185628 A JP 2011185628A JP 2011185628 A JP2011185628 A JP 2011185628A JP 2013046917 A JP2013046917 A JP 2013046917A
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electrodes
joined
electrode
welding
alloy
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Atsushi Ito
厚 伊藤
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Nippon Avionics Co Ltd
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Nippon Avionics Co Ltd
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PROBLEM TO BE SOLVED: To suppress the generation of metal powder, the breakage of a material to be joined and the consumption of an electrode.SOLUTION: Welding equipment includes: an electrode 10a which abuts on the material 3 to be joined that is a laminate of a plurality of plates made of metal; an electrode 10b which is opposed to the electrode 10a with the material 3 between both electrodes; a pressurizing mechanism which pressurize at least one of the electrodes 10a, 10b and causes the electrodes 10a, 10b to clamp the material 3; temperature measuring means for measuring the temperatures of the distal end parts of the electrodes 10a, 10b which abut on the material 3; and a welding power source 2 for supplying the current to the electrodes 10a, 10b. The electrodes 10a, 10b are each composed of metal or alloy which contains at least one element of molybdenum, tungsten, iron, nickel and titanium. The welding power source 2 controls current supply quantities to the electrodes 10a, 10b so that the temperatures of the distal end parts of the electrodes 10a, 10b are temperatures less than the melting point of the material 3.

Description

本発明は、複数枚の板の積層体を接合する溶接装置に関するものである。   The present invention relates to a welding apparatus that joins a laminate of a plurality of plates.

近年、複数の平板状の正極電極および負極電極をセパレータを介して積層した積層型リチウムイオン電池が使用されるようになってきている。図３（Ａ）は積層型リチウムイオン電池の積層後の状態を示す斜視図、図３（Ｂ）は電極のタブとリード端子とを接続した状態を示す斜視図である。   In recent years, a stacked lithium ion battery in which a plurality of plate-like positive electrode and negative electrode are stacked via a separator has been used. FIG. 3A is a perspective view showing a state after stacking of the stacked lithium ion battery, and FIG. 3B is a perspective view showing a state where the tabs of the electrodes and the lead terminals are connected.

積層型リチウムイオン電池においては、図３（Ａ）に示すようにアルミニウム（Ａｌ）等の金属箔からなる正極電極１００と銅（Ｃｕ）等の金属箔からなる負極電極１０１とがセパレータ（不図示）を介して交互に積層されている。各正極電極１００には、リード接合用のタブ１０２が設けられており、これらのタブ１０２は、図３（Ｂ）に示すように積層され、接合部１０６において外部接続用のリード端子１０４と接合される。同様に、各負極電極１０１には、リード接合用のタブ１０３が設けられ、これらのタブ１０３は、積層され、接合部１０７において外部接続用のリード端子１０５と接合される。   In the stacked lithium ion battery, as shown in FIG. 3A, a positive electrode 100 made of a metal foil such as aluminum (Al) and a negative electrode 101 made of a metal foil such as copper (Cu) are separated from each other (not shown). ) Are alternately stacked. Each positive electrode 100 is provided with tabs 102 for lead bonding. These tabs 102 are stacked as shown in FIG. 3B, and are joined to lead terminals 104 for external connection at the joints 106. Is done. Similarly, each negative electrode 101 is provided with a tab 103 for lead bonding. These tabs 103 are stacked and bonded to a lead terminal 105 for external connection at a bonding portion 107.

通常、タブ１０２とリード端子１０４との接合およびタブ１０３とリード端子１０５との接合には、超音波溶接、レーザ溶接、抵抗溶接が用いられている（特許文献１、特許文献２参照）。
超音波溶接は、被接合物に垂直方向の圧力を加えながら、接合面に平行な超音波振動を印加して接合する方法である。
レーザ溶接は、被接合物にレーザ光を照射して溶融させ接合する方法である。 Usually, ultrasonic welding, laser welding, and resistance welding are used for joining the tab 102 and the lead terminal 104 and joining the tab 103 and the lead terminal 105 (see Patent Document 1 and Patent Document 2).
Ultrasonic welding is a method of joining by applying ultrasonic vibration parallel to the joining surface while applying a vertical pressure to the workpieces.
Laser welding is a method in which a workpiece is irradiated with laser light to be melted and joined.

抵抗溶接は、図４に示すように、複数枚のタブ１０２（またはタブ１０３）とリード端子１０４（またはリード端子１０５）とを上下から一対の電極１０８ａ，１０８ｂで挟み込み押圧しながら、電極１０８ａ，１０８ｂ間に電流を流して、発生するジュール熱でタブ１０２（またはタブ１０３）とリード端子１０４（またはリード端子１０５）とを溶融させて接合を行う方法である。   As shown in FIG. 4, resistance welding is performed by sandwiching and pressing a plurality of tabs 102 (or tabs 103) and lead terminals 104 (or lead terminals 105) between a pair of electrodes 108a and 108b from above and below. This is a method in which a current is passed through 108b and the tab 102 (or tab 103) and the lead terminal 104 (or lead terminal 105) are melted and joined by the generated Joule heat.

特開２００８−６６１７０号公報JP 2008-66170 A 特開２００９−３２６７０号公報JP 2009-32670 A

超音波溶接には、溶接時の超音波振動によって電池から微小な金属粉が脱落するという問題点があった。また、電極の枚数増加によりタブの枚数が増加すると、必要な溶接エネルギーが増加するので、超音波の出力を上げる必要があり、タブが破れたり切れたりする可能性があった。
レーザ溶接では、ＡｌやＣｕからなる被接合物の反射率が高いため、高エネルギーのレーザ光が必要になるという問題点があった。また、スパッタと呼ばれる金属粉が発生するという問題点があった。 Ultrasonic welding has a problem in that fine metal powder drops from the battery due to ultrasonic vibration during welding. Further, when the number of tabs increases due to an increase in the number of electrodes, the required welding energy increases, so it is necessary to increase the output of ultrasonic waves, and the tabs may be torn or cut.
In laser welding, there is a problem that a high-energy laser beam is required because of the high reflectance of an object made of Al or Cu. In addition, there is a problem that metal powder called sputtering is generated.

一方、抵抗溶接では、超音波溶接およびレーザ溶接で問題となる金属粉の発生やタブの破損を抑制することができる。しかしながら、ＡｌやＣｕからなる被接合物の電気抵抗が低く、発熱し難いため、複数枚のタブを接合するためには電極に大電流を流す必要があり、高温となる電極の消耗が激しいという問題点があった。特に、一般的に用いられているＣｕ合金の電極を利用してＡｌ箔からなるタブを接合しようとすると、電極の主成分であるＣｕとタブの主成分であるＡｌとが合金化反応しＣｕ−Ａｌ合金が生成されることで電極先端が著しく消耗する。
なお、以上の問題点は、積層型リチウムイオン電池に限らず、複数枚のＡｌ箔やＣｕ箔を接合する場合には、同様に発生する。 On the other hand, in resistance welding, generation | occurrence | production of the metal powder and damage to a tab which become a problem by ultrasonic welding and laser welding can be suppressed. However, since the electrical resistance of the object made of Al or Cu is low and hardly generates heat, it is necessary to pass a large current through the electrodes in order to join a plurality of tabs, and the consumption of the electrodes that become high temperature is severe. There was a problem. In particular, when trying to join a tab made of Al foil using a commonly used Cu alloy electrode, Cu as the main component of the electrode and Al as the main component of the tab undergo an alloying reaction. -The electrode tip is significantly consumed due to the formation of the Al alloy.
The above-mentioned problems are not limited to the stacked lithium ion battery, and similarly occur when a plurality of Al foils and Cu foils are joined.

本発明は、上記課題を解決するためになされたもので、金属粉の発生、被接合物の破損および電極の消耗を抑えることができる溶接装置を提供することを目的とする。   The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a welding apparatus that can suppress generation of metal powder, breakage of an object to be joined, and consumption of an electrode.

本発明の溶接装置は、金属からなる複数枚の板の積層体である被接合物と当接する第１の電極と、前記被接合物を間に挟んで前記第１の電極と対向する第２の電極と、前記第１、第２の電極のうち少なくとも一方を加圧し、前記被接合物を前記第１、第２の電極によって挟持させる加圧機構と、前記第１、第２の電極の、前記被接合物と当接する先端部の温度を測定する温度測定手段と、前記第１、第２の電極間に電流を供給する溶接電源とを備え、前記第１、第２の電極は、モリブデン、タングステン、鉄、ニッケル、チタンのうち少なくとも１つの元素を含む金属または合金からなり、前記溶接電源は、前記温度測定手段の測定結果に基づいて、前記第１、第２の電極の先端部の温度が前記被接合物の融点未満の温度になるように前記第１、第２の電極への通電量を制御することを特徴とするものである。
また、本発明の溶接装置の１構成例において、前記被接合物は、アルミニウム若しくはアルミニウム合金からなる複数枚の板の積層体、銅若しくは銅合金からなる複数枚の板の積層体、または、アルミニウム若しくはアルミニウム合金からなる板と銅若しくは銅合金からなる板とを複数枚積層した積層体のいずれかである。 The welding apparatus of the present invention includes a first electrode that comes into contact with an object to be bonded, which is a laminate of a plurality of plates made of metal, and a second electrode that faces the first electrode with the object to be bonded in between. A pressurizing mechanism that pressurizes at least one of the first and second electrodes and clamps the object to be joined between the first and second electrodes, and the first and second electrodes. And a temperature measuring means for measuring the temperature of the tip portion in contact with the object to be joined, and a welding power source for supplying a current between the first and second electrodes, wherein the first and second electrodes are: The welding power source is made of a metal or alloy containing at least one element selected from molybdenum, tungsten, iron, nickel, and titanium, and the welding power source is based on the measurement result of the temperature measuring means. So that the temperature of the substrate is lower than the melting point of the workpiece. , It is characterized in that for controlling the energization amount of the second electrode.
Moreover, in one structural example of the welding apparatus of the present invention, the object to be joined is a laminate of a plurality of plates made of aluminum or an aluminum alloy, a laminate of a plurality of plates made of copper or a copper alloy, or aluminum. Or it is either the laminated body which laminated | stacked multiple sheets of the board which consists of an aluminum alloy, and the board which consists of copper or a copper alloy.

本発明によれば、被接合物を加圧しつつ、第１、第２の電極の先端部の温度が被接合物の融点未満の温度になるように第１、第２の電極への通電量を制御することにより、被接合物の各接合面を固相拡散接合することができ、第１、第２の電極の先端部が従来の抵抗溶接の場合よりも低い温度に設定されるので、抵抗溶接と比較して第１、第２の電極の消耗を抑えることができる。また、本発明では、抵抗溶接と同様に、金属粉の発生や被接合物の破損を回避することができる。さらに、本発明では、第１、第２の電極を、モリブデン、タングステン、鉄、ニッケル、チタンのうち少なくとも１つの元素を含む金属または合金から構成することにより、第１、第２の電極の消耗を更に抑えることができる。その結果、本発明では、電極のメンテナンスの頻度を減らすことができる。   According to the present invention, the energization amount to the first and second electrodes is such that the temperature of the tip portions of the first and second electrodes becomes a temperature lower than the melting point of the workpiece while pressurizing the workpiece. By controlling the above, it is possible to perform solid phase diffusion bonding of each bonding surface of the objects to be bonded, and the tips of the first and second electrodes are set at a lower temperature than in the case of conventional resistance welding, Compared with resistance welding, the consumption of the first and second electrodes can be suppressed. Moreover, in this invention, generation | occurrence | production of metal powder and damage to a to-be-joined object can be avoided similarly to resistance welding. Furthermore, in the present invention, the first and second electrodes are made of a metal or alloy containing at least one element of molybdenum, tungsten, iron, nickel, and titanium, so that the first and second electrodes are consumed. Can be further suppressed. As a result, in the present invention, the frequency of electrode maintenance can be reduced.

本発明の実施の形態に係る溶接装置の構成を示すブロック図である。It is a block diagram which shows the structure of the welding apparatus which concerns on embodiment of this invention. 本発明の実施の形態に係る溶接ヘッドの拡大断面図である。It is an expanded sectional view of the welding head concerning an embodiment of the invention. 積層型リチウムイオン電池の積層後の状態および電極のタブとリード端子とを接続した状態を示す斜視図である。It is a perspective view which shows the state after lamination | stacking of a lamination type lithium ion battery, and the state which connected the tab and lead terminal of the electrode. 抵抗溶接における接合部の拡大断面図である。It is an expanded sectional view of the joined part in resistance welding.

以下、本発明の実施の形態について図面を参照して説明する。図１は本発明の実施の形態に係る溶接装置の構成を示すブロック図である。溶接装置は、溶接ヘッド１と、溶接電源２とから構成される。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a welding apparatus according to an embodiment of the present invention. The welding apparatus includes a welding head 1 and a welding power source 2.

図２に示すように、溶接ヘッド１は電極１０ａ，１０ｂを備えている。電極１０ａ，１０ｂは、Ｃｕ合金からなる電極本体１１ａ，１１ｂと、モリブデン（Ｍｏ）、タングステン（Ｗ）、鉄（Ｆｅ）、ニッケル（Ｎｉ）、チタン（Ｔｉ）のうち少なくとも１つの元素を含む金属または合金からなる先端部１２ａ，１２ｂとから構成される。さらに、溶接ヘッド１は、先端部１２ａ，１２ｂに取り付けられた温度測定手段である熱電対１３ａ，１３ｂと、電極１０ａ，１０ｂを上下させて被接合物３を挟み込み加圧する加圧機構１４ａ，１４ｂとを備えている。   As shown in FIG. 2, the welding head 1 includes electrodes 10a and 10b. The electrodes 10a and 10b are electrode bodies 11a and 11b made of a Cu alloy and a metal containing at least one element selected from molybdenum (Mo), tungsten (W), iron (Fe), nickel (Ni), and titanium (Ti). Or it is comprised from the front-end | tip parts 12a and 12b which consist of alloys. Further, the welding head 1 includes thermocouples 13a and 13b, which are temperature measuring means attached to the tip portions 12a and 12b, and pressurizing mechanisms 14a and 14b that sandwich and pressurize the workpiece 3 by moving the electrodes 10a and 10b up and down. And.

溶接電源２は、三相交流を整流後にスイッチングするか、あるいは直流をスイッチングして交流電圧を生成するＰＷＭ（Pulse Width Modulation）方式のインバータ電源である電源回路２０と、電源回路２０の出力を低電圧、大電流に変換して電極１０ａ，１０ｂに供給するためのトランス２１と、トランス２１の２次側を流れる電流を検出するホール素子２２とを備えている。   The welding power source 2 is a PWM (Pulse Width Modulation) type inverter power source that switches three-phase alternating current after rectification or generates direct current by switching direct current, and the output of the power source circuit 20 is low. A transformer 21 for converting the voltage into a large current and supplying it to the electrodes 10a and 10b, and a hall element 22 for detecting the current flowing through the secondary side of the transformer 21 are provided.

以下、溶接装置の動作を説明する。本実施の形態では、複数枚のタブ１０２とリード端子１０４とを積層した積層体を被接合物３として説明する。タブ１０２の１枚あたりの厚さは例えば１０μｍ〜１５０μｍ程度である。   Hereinafter, the operation of the welding apparatus will be described. In the present embodiment, a stacked body in which a plurality of tabs 102 and lead terminals 104 are stacked will be described as an object to be bonded 3. The thickness of one tab 102 is, for example, about 10 μm to 150 μm.

最初に、溶接ヘッド１の加圧機構１４ａ，１４ｂは、図２に示すように電極１０ａ，１０ｂによって被接合物３を上下方向（積層体の積層方向に沿った方向）から挟み込み加圧する。なお、図２の例では、加圧機構１４ａ，１４ｂがそれぞれ電極１０ａ，１０ｂに圧力を加えるようになっているが、電極１０ａ，１０ｂのうちどちらか一方のみに圧力を加えるようにしてもよいことは言うまでもない。   First, the pressurizing mechanisms 14a and 14b of the welding head 1 sandwich and press the object 3 from the vertical direction (the direction along the stacking direction of the stacked body) with the electrodes 10a and 10b as shown in FIG. In the example of FIG. 2, the pressurizing mechanisms 14a and 14b apply pressure to the electrodes 10a and 10b, respectively. However, pressure may be applied to only one of the electrodes 10a and 10b. Needless to say.

電源回路２０は、例えばユーザからの溶接開始指示に応じて、数十Ｈｚ〜数十ｋＨｚの交流電圧を生成する。これにより、電源回路２０からの電圧がトランス２１に印加され、電極１０ａ，１０ｂ間に電流が流れるので、電極１０ａ，１０ｂおよび被接合物３の温度が上昇する。
電極１０ａ，１０ｂの先端部１２ａ，１２ｂの温度は熱電対１３ａ，１３ｂによって電圧に変換される。 The power supply circuit 20 generates an AC voltage of several tens Hz to several tens kHz, for example, in response to a welding start instruction from the user. As a result, the voltage from the power supply circuit 20 is applied to the transformer 21 and a current flows between the electrodes 10a and 10b, so that the temperatures of the electrodes 10a and 10b and the object to be bonded 3 rise.
The temperatures of the tips 12a and 12b of the electrodes 10a and 10b are converted into voltages by the thermocouples 13a and 13b.

電源回路２０は、熱電対１３ａ，１３ｂからの電圧に基づいて先端部１２ａ，１２ｂの温度を求め、この温度が被接合物３の融点未満の温度になるように電極１０ａ，１０ｂへの通電量を制御する。ＰＷＭ方式のインバータ電源の場合、電源回路２０は、トランス２１に出力するパルス電圧のデューティー比を変化させることで、電極１０ａ，１０ｂへの通電量を制御する。Ａｌの融点は６６０℃なので、先端部１２ａ，１２ｂの温度を例えば６００℃に設定する。   The power supply circuit 20 obtains the temperatures of the tip portions 12a and 12b based on the voltages from the thermocouples 13a and 13b, and the energization amount to the electrodes 10a and 10b so that the temperature is lower than the melting point of the article 3 to be joined. To control. In the case of a PWM inverter power supply, the power supply circuit 20 controls the energization amount to the electrodes 10 a and 10 b by changing the duty ratio of the pulse voltage output to the transformer 21. Since the melting point of Al is 660 ° C., the temperatures of the tips 12a and 12b are set to 600 ° C., for example.

Ａｌからなる被接合物３は、Ｍｏ，Ｗ，Ｆｅ，Ｎｉ，Ｔｉのうち少なくとも１つの元素を含む金属または合金からなる先端部１２ａ，１２ｂよりも電気抵抗が低い。したがって、被接合物３の温度は、先端部１２ａ，１２ｂの温度よりも低くなる。このように、本実施の形態では、先端部１２ａ，１２ｂの温度を被接合物３の融点未満の温度に設定するため、被接合物３を溶融させる抵抗溶接とは異なる原理で、被接合物３の接合を行う。すなわち、本実施の形態では、電極１０ａ，１０ｂによって被接合物３を加圧しつつ被接合物３の融点未満の温度で加熱することにより、被接合物３の各接合面（タブ同士の接合面、およびタブとリード端子との接合面）を固相拡散接合させる。固相拡散接合は、各接合面にある酸化被膜や微小な異物を加圧と加熱により破壊しながら、各接合面を密着させて、微視的な凹凸の塑性変形と凝着および接合面間の原子の拡散を利用して被接合物３を接合する方法である。すなわち、固相拡散接合は、接合工程中に接合面の清浄化と密着化とを同時に行う。   The to-be-joined object 3 made of Al has a lower electrical resistance than the tip portions 12a and 12b made of a metal or alloy containing at least one element among Mo, W, Fe, Ni and Ti. Therefore, the temperature of the article 3 is lower than the temperatures of the tip portions 12a and 12b. Thus, in this Embodiment, in order to set the temperature of the front-end | tip parts 12a and 12b to the temperature below melting | fusing point of the to-be-joined object 3, it is based on a principle different from the resistance welding which fuse | melts the to-be-joined object 3. 3 is joined. In other words, in the present embodiment, each bonding surface (the bonding surface between the tabs) of the workpiece 3 is heated by pressing the workpiece 3 with the electrodes 10a and 10b at a temperature lower than the melting point of the workpiece 3. , And the joining surface of the tab and the lead terminal). In solid phase diffusion bonding, the oxide film and minute foreign matter on each bonding surface are destroyed by pressurization and heating, and the bonding surfaces are brought into close contact with each other to cause plastic deformation and adhesion between microscopic unevenness and the bonding surface. This is a method of bonding the object 3 using the diffusion of atoms. That is, in the solid phase diffusion bonding, the bonding surface is simultaneously cleaned and adhered during the bonding process.

本実施の形態では、電極１０ａ，１０ｂの先端部１２ａ，１２ｂの温度を被接合物３の融点未満の温度に設定するため、先端部１２ａ，１２ｂが従来の抵抗溶接の場合よりも低い温度に設定されることになり、抵抗溶接と比較して先端部１２ａ，１２ｂの消耗を抑えることができる。また、本実施の形態では、従来の電極に使用されていたＣｕ合金よりも消耗し難い金属を先端部１２ａ，１２ｂに用いることにより、先端部１２ａ，１２ｂの消耗を更に抑えることができる。本実施の形態では、先端部１２ａ，１２ｂの材料として、Ｍｏ，Ｗ，Ｆｅ，Ｎｉ，Ｔｉのうち少なくとも１つの元素を含む金属または合金を用いている。このような金属の例としては、タングステンカーバイド（ＷＣ）、銅タングステン（ＣｕＷ）、銀タングステン（ＡｇＷ）、ニクロム（Ｎｉ−Ｃｒ）、ＪＩＳ６０種チタン合金などがある。   In the present embodiment, since the temperatures of the tips 12a and 12b of the electrodes 10a and 10b are set to a temperature lower than the melting point of the article 3 to be joined, the tips 12a and 12b are set to a temperature lower than that in the case of conventional resistance welding. As a result, it is possible to suppress consumption of the tip portions 12a and 12b as compared with resistance welding. Moreover, in this Embodiment, consumption of the front-end | tip parts 12a and 12b can further be suppressed by using for the front-end | tip parts 12a and 12b the metal which is hard to be consumed rather than Cu alloy used for the conventional electrode. In the present embodiment, a metal or alloy containing at least one element among Mo, W, Fe, Ni, and Ti is used as the material of the tip portions 12a and 12b. Examples of such metals include tungsten carbide (WC), copper tungsten (CuW), silver tungsten (AgW), nichrome (Ni-Cr), and JIS 60 type titanium alloy.

なお、電極本体１１ａ，１１ｂに従来の電極と同じＣｕ合金を用いている理由は、被接合物３の加熱に必要な先端部１２ａ，１２ｂと加熱に直接関与しない電極本体１１ａ，１１ｂの材料を変えることで、電極本体１１ａ，１１ｂの温度上昇を抑え、消費電力を削減するためである。   The reason why the same Cu alloy as that of the conventional electrode is used for the electrode bodies 11a and 11b is that the tip portions 12a and 12b necessary for heating the article 3 and the material of the electrode bodies 11a and 11b not directly involved in the heating are used. This is to suppress the temperature rise of the electrode bodies 11a and 11b and to reduce power consumption.

また、本実施の形態では、先端部１２ａ，１２ｂの温度を被接合物３の融点未満の温度に設定する制御のみについて説明しているが、これに限るものではない。すなわち、トランス２１の２次側を流れる電流（つまり、電極１０ａ，１０ｂに流れる電流）を検出するホール素子２２から帰還される電流量信号に基づく定電流制御、電極１０ａ，１０ｂ間に印加される電圧に基づく定電圧制御、電極１０ａ，１０ｂに流れる電流の値と電極１０ａ，１０ｂ間に印加される電圧の値とを積算した電力値に基づく定電力制御、および電圧値を電流値で除算した抵抗値に基づく抵抗制御を、本実施の形態の制御と適宜組み合わせてもよい。   In the present embodiment, only the control for setting the temperatures of the tip portions 12a and 12b to a temperature lower than the melting point of the article 3 is described, but the present invention is not limited to this. That is, constant current control based on a current amount signal fed back from the Hall element 22 that detects the current flowing through the secondary side of the transformer 21 (that is, the current flowing through the electrodes 10a and 10b) is applied between the electrodes 10a and 10b. Constant voltage control based on the voltage, constant power control based on the power value obtained by integrating the value of the current flowing through the electrodes 10a and 10b and the value of the voltage applied between the electrodes 10a and 10b, and the voltage value divided by the current value Resistance control based on the resistance value may be appropriately combined with the control of the present embodiment.

また、本実施の形態では、Ａｌからなる複数枚の板の積層体を被接合物３としているが、これに限るものではなく、Ａｌ合金からなる複数枚の板の積層体を被接合物としてもよいし、Ｃｕ若しくはＣｕ合金からなる複数枚の板の積層体を被接合物としてもよいし、Ａｌ若しくはＡｌ合金からなる板とＣｕ若しくはＣｕ合金からなる板とを複数枚積層した積層体を被接合物としてもよい。   In this embodiment, a laminate of a plurality of plates made of Al is used as the article to be joined 3. However, the present invention is not limited to this, and a laminate of a plurality of boards made of Al alloy is used as the article to be joined. Alternatively, a laminate of a plurality of plates made of Cu or Cu alloy may be used as an object to be joined, or a laminate in which a plurality of plates made of Al or Al alloy and a plate made of Cu or Cu alloy are laminated. It is good also as a thing to be joined.

なお、先端部１２ａ，１２ｂの下限温度は被接合物３の各接合界面の固相拡散が進行する温度（推定では２００〜４００℃）に設定すればよい。すなわち、先端部１２ａ，１２ｂの温度を、被接合物３の融点未満、かつ被接合物３の各接合界面の固相拡散が進行する温度以上に設定すればよい。   In addition, what is necessary is just to set the minimum temperature of front-end | tip part 12a, 12b to the temperature (200-400 degreeC by estimation) which the solid-phase diffusion of each joining interface of the to-be-joined object 3 advances. That is, the temperatures of the tip portions 12a and 12b may be set to be lower than the melting point of the article 3 to be bonded and higher than the temperature at which the solid phase diffusion of each bonding interface of the article 3 proceeds.

本発明は、複数枚の板の積層体を接合する技術に適用することができる。   The present invention can be applied to a technique for joining a laminate of a plurality of plates.

１…溶接ヘッド、２…溶接電源、３…被接合物、１０ａ，１０ｂ…電極、１１ａ，１１ｂ…電極本体、１２ａ，１２ｂ…先端部、１３ａ，１３ｂ…熱電対、１４ａ，１４ｂ…加圧機構、２０…電源回路、２１…トランス、２２…ホール素子。   DESCRIPTION OF SYMBOLS 1 ... Welding head, 2 ... Welding power supply, 3 ... Joined object, 10a, 10b ... Electrode, 11a, 11b ... Electrode main body, 12a, 12b ... Tip part, 13a, 13b ... Thermocouple, 14a, 14b ... Pressurization mechanism , 20 ... power supply circuit, 21 ... transformer, 22 ... Hall element.

Claims (2)

金属からなる複数枚の板の積層体である被接合物と当接する第１の電極と、
前記被接合物を間に挟んで前記第１の電極と対向する第２の電極と、
前記第１、第２の電極のうち少なくとも一方を加圧し、前記被接合物を前記第１、第２の電極によって挟持させる加圧機構と、
前記第１、第２の電極の、前記被接合物と当接する先端部の温度を測定する温度測定手段と、
前記第１、第２の電極間に電流を供給する溶接電源とを備え、
前記第１、第２の電極は、モリブデン、タングステン、鉄、ニッケル、チタンのうち少なくとも１つの元素を含む金属または合金からなり、
前記溶接電源は、前記温度測定手段の測定結果に基づいて、前記第１、第２の電極の先端部の温度が前記被接合物の融点未満の温度になるように前記第１、第２の電極への通電量を制御することを特徴とする溶接装置。 A first electrode in contact with an object to be joined which is a laminate of a plurality of plates made of metal;
A second electrode facing the first electrode with the object to be joined in-between;
A pressurizing mechanism that pressurizes at least one of the first and second electrodes and clamps the object to be joined by the first and second electrodes;
Temperature measuring means for measuring a temperature of a tip portion of the first and second electrodes contacting the object to be joined;
A welding power source for supplying a current between the first and second electrodes,
The first and second electrodes are made of a metal or alloy containing at least one element of molybdenum, tungsten, iron, nickel, titanium,
Based on the measurement result of the temperature measuring means, the welding power source is configured such that the temperature at the tip of the first and second electrodes is lower than the melting point of the object to be joined. A welding apparatus that controls the amount of current applied to an electrode. 請求項１記載の溶接装置において、
前記被接合物は、アルミニウム若しくはアルミニウム合金からなる複数枚の板の積層体、銅若しくは銅合金からなる複数枚の板の積層体、または、アルミニウム若しくはアルミニウム合金からなる板と銅若しくは銅合金からなる板とを複数枚積層した積層体のいずれかであることを特徴とする溶接装置。 The welding device according to claim 1,
The object to be joined is composed of a laminate of a plurality of plates made of aluminum or an aluminum alloy, a laminate of a plurality of plates made of copper or a copper alloy, or a plate made of aluminum or an aluminum alloy and copper or a copper alloy. A welding apparatus, wherein the welding apparatus is a laminated body in which a plurality of plates are laminated.
JP2011185628A 2011-08-29 2011-08-29 Welding equipment Pending JP2013046917A (en)

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CN103730694A (en) * 2013-12-27 2014-04-16 深圳市光大激光科技股份有限公司 Lithium battery welding/detecting/marking integrated machine
CN115815771A (en) * 2022-11-21 2023-03-21 海安能达电气有限公司 Copper-aluminum flexible connection welding equipment
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