WO2018230796A1 - Battery module having improved connection structure between electrode leads and bus bar - Google Patents

Battery module having improved connection structure between electrode leads and bus bar Download PDF

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Publication number
WO2018230796A1
WO2018230796A1 PCT/KR2018/000136 KR2018000136W WO2018230796A1 WO 2018230796 A1 WO2018230796 A1 WO 2018230796A1 KR 2018000136 W KR2018000136 W KR 2018000136W WO 2018230796 A1 WO2018230796 A1 WO 2018230796A1
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WO
WIPO (PCT)
Prior art keywords
battery module
bus bar
lead
electrode lead
electrode
Prior art date
Application number
PCT/KR2018/000136
Other languages
French (fr)
Korean (ko)
Inventor
이정훈
강달모
류상우
문정오
박진용
지호준
Original Assignee
주식회사 엘지화학
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Priority to CN201890000321.3U priority Critical patent/CN209607818U/en
Publication of WO2018230796A1 publication Critical patent/WO2018230796A1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • 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
    • B23K1/00—Soldering, e.g. brazing, or unsoldering
    • 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
    • B23K1/00—Soldering, e.g. brazing, or unsoldering
    • B23K1/0008—Soldering, e.g. brazing, or unsoldering specially adapted for particular articles or work
    • B23K1/0016—Brazing of electronic components
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/505—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising a single busbar
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/509—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the type of connection, e.g. mixed connections
    • H01M50/512—Connection only in parallel
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/514—Methods for interconnecting adjacent batteries or cells
    • H01M50/516—Methods for interconnecting adjacent batteries or cells by welding, soldering or brazing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/521—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the material
    • H01M50/522—Inorganic material
    • 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
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/36—Electric or electronic devices
    • 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 invention relates to a battery module having an improved coupling structure between an electrode lead and a bus bar, and more particularly, a bending process of the electrode lead can be omitted, and a structure in which the electrode lead can be easily inserted into the bus bar. It relates to a battery module having.
  • a component called a bus bar may be used.
  • the pouch type battery cell includes an electrode lead drawn out to the outside of the pouch case.
  • a bus bar may be used when a plurality of such pouch type battery cells are connected to form a battery module.
  • a conventional battery module having a form in which a plurality of pouch type battery cells are electrically connected by a bus bar is illustrated.
  • each electrode lead 2 drawn from the plurality of pouch type battery cells 1 into the insertion slit 4 of the bus bar 3 As shown in FIG. 2, the inserted electrode leads 2 are manufactured by bending and welding the inserted electrode leads 2 to the bus bars 3.
  • the conventional battery module requires a process of bending the electrode lead 2 in addition to a process of inserting and welding the insertion slit 4 of the bus bar 3 and a process of manufacturing the electrode lead 2. Make it complicated
  • the length of the electrode lead 2 is shorter.
  • the electrode lead 2 and the bus bar 3 are shortened.
  • the joint area between the joints is also reduced, which lowers the bond strength, thereby increasing the risk of product defects.
  • the present invention has been made in view of the above-described problems, and it is an object of the present invention to manufacture a battery module in which a bending process of an electrode lead can be omitted, and an electrode lead can be easily inserted into a bus bar.
  • Battery module for solving the above technical problem, a plurality of battery cells having an electrode lead; A bus bar in which a plurality of lead clips having insertion slits into which electrode leads of each of the plurality of battery cells are inserted are connected to each other; And a solder filling the empty space between the electrode lead and the inner wall surface of the insertion slit to electrically connect the electrode lead and the bus bar.
  • the lead clip may have an opening formed at one side of the insertion slit.
  • the opening may have a tapered shape such that the width thereof becomes wider from the inner side to the outer side of the insertion slit.
  • the lead clip may include a fixed end formed at one side and a free end formed at the other side to flow in a direction of widening and narrowing the width of the insertion slit, and a plurality of lead clips may be connected to each other.
  • the battery cell may have a form in which a pair of electrode leads are drawn out in opposite directions.
  • the plurality of battery cells may be connected in parallel.
  • a method of manufacturing a battery module according to an embodiment of the present invention the method of manufacturing a battery module according to an embodiment of the present invention, a plurality of battery cells are stacked Laminating step to make; Coupling an insertion clip of a bus bar to an electrode lead provided in the battery cell; And a soldering step of soldering the electrode leads to be fixed to the busbars to fill the gaps between the insertion slits and the electrode leads.
  • the inserting step may be a step of inserting the electrode lead into an insertion slit formed in the insertion clip.
  • the soldering step may be performed after coating the tin on the surface of the electrode lead located in the insertion slit.
  • the bending process of the electrode lead may be omitted in manufacturing the battery module.
  • the coupling between the electrode lead and the busbar is prevented due to the friction between the electrode lead and the external object during the assembly process and / or use. Breaking can be minimized, which can minimize the occurrence of product defects.
  • FIG 1 and 2 are views showing a process of coupling the electrode lead and the bus bar in manufacturing a conventional battery module.
  • FIG. 3 is a perspective view illustrating a battery cell applied to a battery module according to an exemplary embodiment of the present invention.
  • FIG. 4 is a partial perspective view illustrating a portion of a battery cell stack and a bus bar coupled to a battery module according to an embodiment of the present invention.
  • FIG. 5 is a diagram illustrating a direction in which a bus bar applied to a battery module according to an exemplary embodiment of the present invention is coupled to a battery cell stack.
  • FIG. 6 is a partial front view illustrating a part of a shape in which a battery cell stack and a bus bar are applied to a battery module according to an exemplary embodiment of the present invention.
  • FIG. 7 is an enlarged view of region B of FIG. 6.
  • FIG. 8 is a partial front view showing a completed form of a battery module according to an embodiment of the present invention.
  • FIG. 3 is a perspective view illustrating a battery cell applied to a battery module according to an embodiment of the present invention
  • FIG. 4 is a view illustrating a battery cell stack and a bus bar coupled to a battery module according to an embodiment of the present invention. It is a partial perspective view which shows a part.
  • a battery module according to an embodiment of the present invention includes a battery cell stack in which a plurality of battery cells 10 are stacked and a bus bar electrically connecting the plurality of battery cells 10. And 20.
  • Each battery cell 10 constituting the battery cell stack is implemented as a pouch type battery cell including an electrode assembly and a pouch case accommodating the electrode assembly, and a pair of electrode leads connected to the electrode assembly ( 11) may be drawn out of the pouch case, but may be drawn in the same direction or in the opposite direction.
  • a pouch type battery cell 10 having a form in which a pair of electrode leads 11 are drawn out in opposite directions is illustrated, but a battery applied to a battery module according to the present invention.
  • the cell 10 is not necessarily limited thereto, and the pair of electrode leads 11 may be drawn out in the same direction.
  • the battery cells 10 are stacked such that electrode leads 11 having the same polarity are positioned in the same direction. This is because the electrode leads 11 having the same polarity should be connected to each other when the electrode leads 11 are electrically connected by using the bus bar 20. As the electrode leads 11 having the same polarity are electrically connected to each other, each of the battery cells 10 is connected in parallel.
  • Electrode lead 11 As the electrode lead 11, a thin metal plate made of aluminum (Al) coated with nickel (Ni) is generally used, and a welding operation for coupling the electrode lead 11 and the bus bar 20 is smooth. In order to achieve this, it is preferable to apply a tin (Sn) coating on the surface of the electrode lead 11.
  • the bus bar 20 is a component applied to electrically connect the electrode leads 11 included in each battery cell 10, and includes a plurality of insertion slits S into which the electrode leads 11 are inserted. ) Are formed.
  • the insertion slits S are formed by the number of battery cells 10 to provide a space in which the electrode leads 11 of each battery cell 10 drawn out in the same direction can be inserted.
  • the electrode leads 11 inserted in the S are coupled to the busbar 20 by soldering in the insertion slit S as described later.
  • FIG. 5 is a diagram illustrating a direction in which a bus bar applied to a battery module according to an embodiment of the present invention is coupled to a battery cell stack
  • FIG. 6 is a battery cell applied to a battery module according to an embodiment of the present invention.
  • FIG. 7 is an enlarged view of region B of FIG. 6.
  • the bus bar 20 includes a plurality of lead clips 21 formed with slits S having a shape corresponding to the electrode leads 11 so that the electrode leads 11 can be inserted. It may be implemented in a connected form.
  • the lead clip 21 has a structure capable of widening or narrowing the width of the slit S by flowing a free end formed on the other side around the fixed end formed on one side, and the plurality of lead clips 21.
  • the free ends are connected to each other to form one bus bar 20.
  • the lead clip 21 has an opening portion 22 formed on one side of the insertion slit S, and the opening portion 22 is wider from the inside of the insertion slit S toward the outside. It has a tapered shape to be wider.
  • the insertion slit S formed in the bus bar 20 has a minimum width (D2) in the portion where the electrode lead 11 is inserted, the end of the opening portion 22, In other words, the inlet portion of the insertion slit S has the maximum width D1.
  • the electrode lead 11 When the width of the inlet portion of the insertion slit S is set in this manner, the electrode lead 11 is not placed at the center of the insertion slit S at the point where the electrode lead 11 starts to be inserted. Even when placed in a right / up / down / down position, the electrode lead 11 can be guided in its insertion slit S by its movement along the opening 22 having a tapered shape.
  • FIG. 8 together with FIG. 7, which was previously referred to, to describe a battery module structure according to an embodiment of the present invention, in which coupling / fixing of the electrode lead 11 and the busbar 20 is completed by soldering. Shall be.
  • FIG. 8 is a partial front view showing a completed form of a battery module according to an embodiment of the present invention.
  • solder 30 is filled in the empty space between the electrode lead 11 and the insertion slit S by soldering.
  • a solder 30 applied to the present invention may have a composition of a conventionally used solder, and for example, metals such as copper (Cu), nickel (Ni), silver (Ag), etc. in addition to tin (Sn). It may have a composition further comprising at least one of.
  • the solder 30 allows the electrode lead 11 and the bus bar 20 made of a metal material to be bonded to each other, in which the tin (Sn) plating layer 11 (see FIG. 7) is formed in the insertion slit S in advance. This allows the plurality of battery cells 10 to be stably electrically connected.
  • the solder 30 preferably covers the electrode lead 11 so that the electrode lead 11 is not exposed to the outside.
  • the solder 30 preferably fills all empty spaces in the insertion slit 30.
  • the cell manufacturing step of manufacturing a plurality of pouch type battery cell 10 the cell manufacturing step of manufacturing a plurality of pouch type battery cell 10; A stacking step of stacking a plurality of manufactured battery cells 10; A busbar manufacturing step of manufacturing the busbar 20; Coupling the insertion clip of the bus bar to the electrode leads 11 provided in the battery cell 10; And a soldering step of filling the solder 30 in the insertion slit S by soldering the electrode lead 11 and the bus bar 20 to be electrically connected to each other.
  • the inserting step corresponds to inserting the electrode lead into an insertion slit formed in the insertion clip.
  • the soldering step may be performed after the process of coating the tin on the surface of the electrode lead 11 located in the insertion slit to facilitate the soldering process.

Abstract

A battery module according to an embodiment of the present invention comprises: a plurality of battery cells, each having an electrode lead; a bus bar formed by connecting a plurality of lead clips to each other, each of the lead clips having an insertion slit into which the electrode lead of each of the plurality of battery cells is inserted; and a solder with which an empty space between the electrode lead and the inner wall surface of the insertion slit is filled so as to electrically connect the electrode lead and the bus bar.

Description

전극 리드와 버스바의 결합 구조가 개선된 배터리 모듈Battery module with improved coupling structure between electrode leads and busbars
본 발명은, 전극 리드와 버스바의 결합 구조가 개선된 배터리 모듈에 관한 것으로서, 좀 더 구체적으로는, 전극 리드의 벤딩 공정이 생략될 수 있고, 또한 전극 리드를 버스바에 삽입하기 용이한 구조를 갖는 배터리 모듈에 관한 것이다.The present invention relates to a battery module having an improved coupling structure between an electrode lead and a bus bar, and more particularly, a bending process of the electrode lead can be omitted, and a structure in which the electrode lead can be easily inserted into the bus bar. It relates to a battery module having.
본 출원은 2017년 06월 13일 자로 출원된 한국 특허출원번호 제10-2017-0074238호에 대한 우선권주장출원으로서, 해당 출원의 명세서 및 도면에 개시된 모든 내용은 인용에 의해 본 출원에 원용된다.This application is a priority application for Korean Patent Application No. 10-2017-0074238, filed June 13, 2017, and all contents disclosed in the specification and drawings of the application are incorporated herein by reference.
복수의 배터리 셀을 전기적으로 연결하기 위해서는 버스바(Bus bar)라는 부품이 이용될 수 있다. 특히, 파우치 타입 배터리 셀의 경우, 파우치 케이스의 외측으로 인출되는 전극 리드를 구비하는데, 이러한 파우치 타입 배터리 셀을 여러 개 연결하여 배터리 모듈을 구성하고자 하는 경우에 버스바를 이용할 수 있다.In order to electrically connect the plurality of battery cells, a component called a bus bar may be used. In particular, the pouch type battery cell includes an electrode lead drawn out to the outside of the pouch case. A bus bar may be used when a plurality of such pouch type battery cells are connected to form a battery module.
도 1 및 도 2를 참조하면, 파우치 타입 배터리 셀 복수개가 버스바에 의해 전기적으로 연결된 형태를 갖는 종래의 배터리 모듈이 나타나 있다.1 and 2, a conventional battery module having a form in which a plurality of pouch type battery cells are electrically connected by a bus bar is illustrated.
이러한 종래의 배터리 모듈은, 도 1에 나타난 바와 같이, 복수의 파우치 타입 배터리 셀(1)로부터 인출된 각각의 전극 리드(2)를 버스바(3)의 삽입 슬릿(4)에 삽입시킨 후, 도 2에 나타난 바와 같이, 삽입된 전극 리드(2)를 벤딩시켜 버스바(3)에 밀착시켜 용접함으로써 제조된다.In the conventional battery module, as shown in FIG. 1, after inserting each electrode lead 2 drawn from the plurality of pouch type battery cells 1 into the insertion slit 4 of the bus bar 3, As shown in FIG. 2, the inserted electrode leads 2 are manufactured by bending and welding the inserted electrode leads 2 to the bus bars 3.
이러한 종래의 배터리 모듈은, 전극 리드(2)를 버스바(3)의 삽입 슬릿(4)을 삽입하는 공정 및 용접하는 공정 이 외에도 전극 리드(2)를 벤딩시키는 공정이 추가적으로 요구되어 제조공정을 복잡하게 만든다.The conventional battery module requires a process of bending the electrode lead 2 in addition to a process of inserting and welding the insertion slit 4 of the bus bar 3 and a process of manufacturing the electrode lead 2. Make it complicated
또한, 파우치 타입 배터리 셀(1)은, 그 두께가 얇아질수록 전극 리드(2)의 길이도 짧게 제조되는데, 이처럼 전극 리드(2)가 짧아지는 경우 전극 리드(2)와 버스바(3) 간의 접합 면적 역시 줄어들게 되어 결합 강도가 저하되고, 이에 따른 제품 불량 발생의 우려 또한 커지게 된다.In addition, as the thickness of the pouch type battery cell 1 becomes shorter, the length of the electrode lead 2 is shorter. In this case, the electrode lead 2 and the bus bar 3 are shortened. The joint area between the joints is also reduced, which lowers the bond strength, thereby increasing the risk of product defects.
본 발명은, 상술한 문제점을 고려하여 창안된 것으로서, 배터리 모듈을 제조함에 있어서, 전극 리드의 벤딩 공정이 생략될 수 있고, 또한 전극 리드를 버스바에 삽입하기 용이하도록 하는 것을 일 목적으로 한다.SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and it is an object of the present invention to manufacture a battery module in which a bending process of an electrode lead can be omitted, and an electrode lead can be easily inserted into a bus bar.
다만, 본 발명이 해결하고자 하는 기술적 과제는 상술한 과제에 제한되지 않으며, 언급되지 않은 또 다른 과제들은 아래에 기재된 발명의 설명으로부터 당업자에게 명확하게 이해될 수 있을 것이다.However, the technical problem to be solved by the present invention is not limited to the above-described problem, another task that is not mentioned will be clearly understood by those skilled in the art from the description of the invention described below.
상술한 기술적 과제를 해결하기 위한 본 발명의 일 실시예에 따른 배터리 모듈은, 전극 리드를 구비하는 복수의 배터리 셀; 상기 복수의 배터리 셀 각각의 전극 리드가 삽입되는 삽입 슬릿을 구비하는 복수의 리드 클립이 서로 연결되어 형성되는 버스바; 및 상기 전극 리드와 삽입 슬릿 내벽면 사이의 빈 공간을 충진시켜 전극 리드와 버스바를 전기적으로 연결시키는 솔더;를 포함한다.Battery module according to an embodiment of the present invention for solving the above technical problem, a plurality of battery cells having an electrode lead; A bus bar in which a plurality of lead clips having insertion slits into which electrode leads of each of the plurality of battery cells are inserted are connected to each other; And a solder filling the empty space between the electrode lead and the inner wall surface of the insertion slit to electrically connect the electrode lead and the bus bar.
상기 리드 클립은, 상기 삽입 슬릿의 일측에 형성된 개방부를 구비할 수 있다.The lead clip may have an opening formed at one side of the insertion slit.
상기 개방부는, 상기 삽입 슬릿의 내측으로부터 외측으로 향할수록 폭이 더 넓어지도록 테이퍼진 형상을 가질 수 있다.The opening may have a tapered shape such that the width thereof becomes wider from the inner side to the outer side of the insertion slit.
상기 리드 클립은 일측에 형성되는 고정단과 타측에 형성되어 상기 삽입 슬릿의 폭을 넓히고 좁히는 방향으로 유동 되는 자유단을 구비하며, 복수의 리드 클립 상호간은 상기 자유단끼리 연결될 수 있다.The lead clip may include a fixed end formed at one side and a free end formed at the other side to flow in a direction of widening and narrowing the width of the insertion slit, and a plurality of lead clips may be connected to each other.
상기 배터리 셀은, 한 쌍의 전극 리드가 서로 반대 방향으로 인출된 형태를 가질 수 있다.The battery cell may have a form in which a pair of electrode leads are drawn out in opposite directions.
상기 배터리 모듈은, 상기 복수의 배터터리 셀이 병렬로 연결될 수 있다.In the battery module, the plurality of battery cells may be connected in parallel.
한편, 상술한 기술적 과제는, 본 발명의 일 실시예에 따른 배터리 모듈의 제조 방법에 의해서도 해결될 수 있는데, 이러한 본 발명의 일 실시예에 따른 배터리 모듈의 제조 방법은, 복수의 배터리 셀을 적층시키는 적층 단계; 상기 배터리 셀에 구비된 전극 리드에 버스바의 삽입 클립을 결합시키는 단계; 및 상기 전극 리드가 버스바에 고정되도록 솔더링을 하여 상기 삽입 슬릿과 전극 리드 사이의 틈새에 솔더를 충진시키는 솔더링 단계;를 포함한다.On the other hand, the above technical problem can be solved by a method of manufacturing a battery module according to an embodiment of the present invention, the method of manufacturing a battery module according to an embodiment of the present invention, a plurality of battery cells are stacked Laminating step to make; Coupling an insertion clip of a bus bar to an electrode lead provided in the battery cell; And a soldering step of soldering the electrode leads to be fixed to the busbars to fill the gaps between the insertion slits and the electrode leads.
상기 삽입 단계는, 상기 전극 리드를 삽입 클립에 형성된 삽입 슬릿 내에 삽입시키는 단계일 수 있다.The inserting step may be a step of inserting the electrode lead into an insertion slit formed in the insertion clip.
상기 솔더링 단계는, 상기 삽입 슬릿 내에 위치한 전극 리드의 표면에 주석을 코팅하는 공정 이 후에 진행될 수 있다.The soldering step may be performed after coating the tin on the surface of the electrode lead located in the insertion slit.
본 발명의 일 측면에 따르면, 배터리 모듈을 제조함에 있어서 전극 리드의 벤딩 공정이 생략될 수 있다.According to an aspect of the present invention, the bending process of the electrode lead may be omitted in manufacturing the battery module.
한편, 본 발명의 다른 측면에 따르면, 배터리 셀이나 버스바의 유동에 의해 전극 리드를 버스바에 삽입 할 때 발생될 수 있는 조립 간섭을 최소화 할 수 있으며, 이로써 전극 리드와 버스바의 결합 공정을 자동화할 수 있게 된다.On the other hand, according to another aspect of the present invention, it is possible to minimize the assembly interference that may occur when the electrode lead is inserted into the bus bar by the flow of the battery cell or bus bar, thereby automating the process of coupling the electrode lead and bus bar You can do it.
본 발명의 또 다른 측면에 따르면, 배터리 셀의 전극 리드가 버스바의 외측으로 노출되지 않기 때문에 조립 공정 및/또는 사용 과정에서 전극 리드와 외부 물체 간의 마찰로 인해 전극 리드와 버스바 사이의 결합이 끊어지는 현상을 최소화할 수 있게 되며, 이로써 제품 불량 발생을 최소화할 수 있게 된다.According to another aspect of the present invention, since the electrode lead of the battery cell is not exposed to the outside of the busbar, the coupling between the electrode lead and the busbar is prevented due to the friction between the electrode lead and the external object during the assembly process and / or use. Breaking can be minimized, which can minimize the occurrence of product defects.
본 명세서에 첨부되는 다음의 도면들은 본 발명의 바람직한 실시예를 예시하는 것이며, 후술되는 발명의 상세한 설명과 함께 본 발명의 기술사상을 더욱 이해시키는 역할을 하는 것이므로, 본 발명은 그러한 도면에 기재된 사항에만 한정되어 해석되어서는 아니 된다.The following drawings attached to this specification are illustrative of the preferred embodiments of the present invention, and together with the detailed description of the invention to serve to further understand the technical spirit of the present invention, the present invention is a matter described in such drawings It should not be construed as limited to.
도 1 및 도 2는, 종래의 배터리 모듈을 제조함에 있어서, 전극 리드와 버스바를 결합시키는 공정을 나타내는 도면이다.1 and 2 are views showing a process of coupling the electrode lead and the bus bar in manufacturing a conventional battery module.
도 3은, 본 발명이 일 실시예에 따른 배터리 모듈에 적용되는 배터리 셀을 나타내는 사시도이다.3 is a perspective view illustrating a battery cell applied to a battery module according to an exemplary embodiment of the present invention.
도 4는, 본 발명의 일 실시예에 따른 배터리 모듈에 적용되는 배터리 셀 적층체와 버스바가 결합된 형태의 일부를 나타내는 부분 사시도이다.4 is a partial perspective view illustrating a portion of a battery cell stack and a bus bar coupled to a battery module according to an embodiment of the present invention.
도 5는, 본 발명의 일 실시예에 따른 배터리 모듈에 적용되는 버스바가 배터리 셀 적층체에 결합되는 방향을 나타내는 도면이다.5 is a diagram illustrating a direction in which a bus bar applied to a battery module according to an exemplary embodiment of the present invention is coupled to a battery cell stack.
도 6은, 본 발명의 일 실시예에 따른 배터리 모듈에 적용되는 배터리 셀 적층체와 버스바가 결합된 형태의 일부를 나타내는 부분 정면도이다.6 is a partial front view illustrating a part of a shape in which a battery cell stack and a bus bar are applied to a battery module according to an exemplary embodiment of the present invention.
도 7은, 도 6의 B영역에 대한 확대도이다.FIG. 7 is an enlarged view of region B of FIG. 6.
도 8은, 본 발명이 일 실시예에 따를 배터리 모듈의 완성된 형태를 나타내는 부분 정면도이다.8 is a partial front view showing a completed form of a battery module according to an embodiment of the present invention.
이하, 첨부된 도면을 참조하여 본 발명의 바람직한 실시예를 상세히 설명하기로 한다. 이에 앞서, 본 명세서 및 청구범위에 사용된 용어나 단어는 통상적이거나 사전적인 의미로 한정해서 해석되어서는 아니 되며, 발명자는 그 자신의 발명을 가장 최선의 방법으로 설명하기 위해 용어의 개념을 적절하게 정의할 수 있다는 원칙에 입각하여 본 발명의 기술적 사상에 부합하는 의미와 개념으로 해석되어야만 한다. 따라서, 본 명세서에 기재된 실시예와 도면에 도시된 구성은 본 발명의 가장 바람직한 일부 실시예에 불과할 뿐이고 본 발명의 기술적 사상을 모두 대변하는 것은 아니므로, 본 출원시점에 있어서 이들을 대체할 수 있는 다양한 균등물과 변형예들이 있을 수 있음을 이해하여야 한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms or words used in the present specification and claims should not be construed as being limited to the common or dictionary meanings, and the inventors should properly explain the concept of terms in order to best explain their own invention. Based on the principle that can be defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention. Therefore, the embodiments described in the specification and the drawings shown in the drawings are only some of the most preferred embodiments of the present invention and do not represent all of the technical spirit of the present invention, various modifications that can be replaced at the time of the present application It should be understood that there may be equivalents and variations.
먼저, 도 3 및 도 4를 참조하여, 본 발명의 일 실시예에 따른 배터리 모듈의 전체적인 구조를 설명하기로 한다.First, referring to Figures 3 and 4, the overall structure of the battery module according to an embodiment of the present invention will be described.
도 3은 본 발명이 일 실시예에 따른 배터리 모듈에 적용되는 배터리 셀을 나타내는 사시도이고, 도 4는 본 발명의 일 실시예에 따른 배터리 모듈에 적용되는 배터리 셀 적층체와 버스바가 결합된 형태의 일부를 나타내는 부분 사시도이다.3 is a perspective view illustrating a battery cell applied to a battery module according to an embodiment of the present invention, and FIG. 4 is a view illustrating a battery cell stack and a bus bar coupled to a battery module according to an embodiment of the present invention. It is a partial perspective view which shows a part.
도 3 및 도 4를 참조하면, 본 발명의 일 실시예에 따른 배터리 모듈은, 배터리 셀(10)이 복수개 적층되어 이루어진 배터리 셀 적층체 및 복수의 배터리 셀(10)들을 전기적으로 연결하는 버스바(20)를 포함한다.3 and 4, a battery module according to an embodiment of the present invention includes a battery cell stack in which a plurality of battery cells 10 are stacked and a bus bar electrically connecting the plurality of battery cells 10. And 20.
상기 배터리 셀 적층체를 구성하는 개개의 배터리 셀(10)은 파우치 타입 배터리 셀로서 전극 조립체 및 전극 조립체를 수용하는 파우치 케이스를 포함하는 형태로 구현되며, 전극 조립체에 연결되는 한 쌍의 전극 리드(11)는 파우치 케이스의 외측으로 인출되되 서로 동일한 방향 또는 반대 방향으로 인출될 수 있다.Each battery cell 10 constituting the battery cell stack is implemented as a pouch type battery cell including an electrode assembly and a pouch case accommodating the electrode assembly, and a pair of electrode leads connected to the electrode assembly ( 11) may be drawn out of the pouch case, but may be drawn in the same direction or in the opposite direction.
본 발명의 도면에서는 도면 도시의 편의상 한 쌍의 전극 리드(11)가 서로 반대방향으로 인출된 형태를 갖는 파우치 타입 배터리 셀(10)에 대해서만 도시하고 있으나, 본 발명에 따른 배터리 모듈에 적용되는 배터리 셀(10)은 반드시 이에 한정되는 것은 아니며, 한 쌍의 전극 리드(11)가 서로 동일한 방향으로 인출되는 경우도 가능한 것이다.In the drawings of the present invention, for convenience of illustration, only a pouch type battery cell 10 having a form in which a pair of electrode leads 11 are drawn out in opposite directions is illustrated, but a battery applied to a battery module according to the present invention. The cell 10 is not necessarily limited thereto, and the pair of electrode leads 11 may be drawn out in the same direction.
상기 배터리 셀(10)들은 서로 동일한 극성을 갖는 전극 리드(11)들이 동일한 방향에 위치하도록 적층된다. 이는 버스바(20)를 이용하여 전극 리드(11)들을 전기적으로 연결시키는 경우 동일한 극성을 갖는 전극 리드(11)들끼리 연결이 되어야 하기 때문이다. 이처럼 동일한 극성을 갖는 전극 리드(11)들끼리 전기적으로 연결이 됨으로써 각각의 배터리 셀(10)들은 병렬 연결을 이루게 된다.The battery cells 10 are stacked such that electrode leads 11 having the same polarity are positioned in the same direction. This is because the electrode leads 11 having the same polarity should be connected to each other when the electrode leads 11 are electrically connected by using the bus bar 20. As the electrode leads 11 having the same polarity are electrically connected to each other, each of the battery cells 10 is connected in parallel.
상기 전극 리드(11)로는, 통상적으로 니켈(Ni)이 코팅된 알루미늄(Al) 재질의 얇은 금속 플레이트가 이용되는데, 이러한 전극 리드(11)와 버스바(20)의 결합을 위한 용접 작업이 원활하게 이루어지도록 하기 위해서는 전극 리드(11)의 표면에 주석(Sn) 코팅을 해 두는 것이 바람직하다.As the electrode lead 11, a thin metal plate made of aluminum (Al) coated with nickel (Ni) is generally used, and a welding operation for coupling the electrode lead 11 and the bus bar 20 is smooth. In order to achieve this, it is preferable to apply a tin (Sn) coating on the surface of the electrode lead 11.
상기 버스바(20)는, 각각의 배터리 셀(10)에 구비된 전극 리드(11)들을 전기적으로 연결시켜 주기 위해 적용되는 부품으로서, 전극 리드(11)들이 삽입되기 위한 복수의 삽입 슬릿(S)들이 형성되어 있다.The bus bar 20 is a component applied to electrically connect the electrode leads 11 included in each battery cell 10, and includes a plurality of insertion slits S into which the electrode leads 11 are inserted. ) Are formed.
이러한 삽입 슬릿(S)들은, 배터리 셀(10)의 개수만큼 형성되어 동일한 방향으로 인출된 각각의 배터리 셀(10)의 전극 리드(11)들이 삽입될 수 있는 공간을 제공하며, 이와 같이 삽입 슬릿(S) 내에 삽입된 전극 리드(11)들은 삽입 슬릿(S) 내에서 후술할 바와 같이 솔더링에 의해 버스바(20)에 결합된다.The insertion slits S are formed by the number of battery cells 10 to provide a space in which the electrode leads 11 of each battery cell 10 drawn out in the same direction can be inserted. The electrode leads 11 inserted in the S are coupled to the busbar 20 by soldering in the insertion slit S as described later.
다음은, 도 5 내지 도 7을 참조하여, 본 발명의 일 실시예에 따른 배터리 모듈에 적용된 버스바(20)의 구체적인 구조를 설명하기로 한다.Next, referring to Figures 5 to 7, the specific structure of the bus bar 20 applied to the battery module according to an embodiment of the present invention will be described.
도 5는, 본 발명의 일 실시예에 따른 배터리 모듈에 적용되는 버스바가 배터리 셀 적층체에 결합되는 방향을 나타내는 도면이고, 도 6은 본 발명의 일 실시예에 따른 배터리 모듈에 적용되는 배터리 셀 적층체와 버스바가 결합된 형태의 일부를 나타내는 부분 정면도이며, 도 7은 도 6의 B영역에 대한 확대도이다.5 is a diagram illustrating a direction in which a bus bar applied to a battery module according to an embodiment of the present invention is coupled to a battery cell stack, and FIG. 6 is a battery cell applied to a battery module according to an embodiment of the present invention. A partial front view showing a part of a form in which a laminate and a bus bar are coupled, and FIG. 7 is an enlarged view of region B of FIG. 6.
도 5 내지 도 7을 참조하면, 상기 버스바(20)는, 전극 리드(11)가 삽입될 수 있도록 전극 리드(11)와 대응되는 형상의 슬릿(S)이 형성된 리드 클립(21)이 복수개 연결된 형태로 구현될 수 있다.5 to 7, the bus bar 20 includes a plurality of lead clips 21 formed with slits S having a shape corresponding to the electrode leads 11 so that the electrode leads 11 can be inserted. It may be implemented in a connected form.
상기 리드 클립(21)은, 일측에 형성되는 고정단을 중심으로 하여 타측에 형성되는 자유단이 유동됨으로써 슬릿(S)의 폭을 넓히거나 좁힐 수 있는 구조를 가지며, 복수의 리드 클립(21) 상호간은 자유단끼리 연결되어 하나의 버스바(20)를 형성한다. The lead clip 21 has a structure capable of widening or narrowing the width of the slit S by flowing a free end formed on the other side around the fixed end formed on one side, and the plurality of lead clips 21. The free ends are connected to each other to form one bus bar 20.
또한, 상기 리드 클립(21)은 삽입 슬릿(S)의 일 측에 형성되는 개방부(22)를 구비하며, 이러한 개방부(22)는 삽입 슬릿(S)의 내측으로부터 외측을 향할수록 폭이 더 넓어지도록 테이퍼진 형상을 갖는다.In addition, the lead clip 21 has an opening portion 22 formed on one side of the insertion slit S, and the opening portion 22 is wider from the inside of the insertion slit S toward the outside. It has a tapered shape to be wider.
즉, 도 6에 나타난 바와 같이, 버스바(20)에 형성된 삽입 슬릿(S)은, 전극 리드(11)가 삽입되는 부분에서는 최소폭(D2)을 가지며, 개방부(22)의 끝부분, 즉 삽입 슬릿(S)의 입구 부분에서는 최대폭(D1)을 갖게 되는 것이다.That is, as shown in Figure 6, the insertion slit S formed in the bus bar 20 has a minimum width (D2) in the portion where the electrode lead 11 is inserted, the end of the opening portion 22, In other words, the inlet portion of the insertion slit S has the maximum width D1.
이처럼 전극 리드(11)가 삽입되기 시작하는 삽입 슬릿(S)의 입구 부분의 폭을 전극 리드(11)가 삽입되는 부분과 비교하여 더 여유 있게 설정하는 것은, 전극 리드(11)들을 버스바(20)의 삽입 슬릿(S) 내에 삽입하는 공정에 있어서 발생될 수 있는 배터리 셀(10)의 움직임, 전극 리드(11)의 휘어짐, 버스바(20)의 움직임 등으로 인해 부품 간섭이 발생되는 것을 최소화 하기 위한 것이다.As described above, setting the width of the inlet portion of the insertion slit S into which the electrode lead 11 starts to be inserted more leisurely than the portion into which the electrode lead 11 is inserted allows the electrode leads 11 to be separated from the busbar ( Part interference due to the movement of the battery cell 10, the bending of the electrode lead 11, the movement of the bus bar 20, and the like, which may occur in the process of inserting into the insertion slit S of the 20). Is to minimize.
이처럼 삽입 슬릿(S)의 입구 부분의 폭이 여유 있게 설정되어 있는 경우, 전극 리드(11)가 삽입되기 시작하는 지점에서 전극 리드(11)가 삽입 슬릿(S)의 정 중앙에 놓여져 있지 않고 좌/우/상/하로 치우친 위치에 놓여져 있더라도, 전극 리드(11)는 테이퍼진 형상을 갖는 개방부(22)를 따라 그 움직임이 가이드 되어 삽입 슬릿(S) 내에 안전하게 삽입될 수 있다.When the width of the inlet portion of the insertion slit S is set in this manner, the electrode lead 11 is not placed at the center of the insertion slit S at the point where the electrode lead 11 starts to be inserted. Even when placed in a right / up / down / down position, the electrode lead 11 can be guided in its insertion slit S by its movement along the opening 22 having a tapered shape.
다음은, 앞서 참조 하였던 도 7과 함께 도 8을 참조하여, 솔더링에 의해 전극 리드(11)와 버스바(20)의 결합/고정이 완료된 본 발명의 일 실시예에 따른 배터리 모듈 구조를 설명하기로 한다.Next, referring to FIG. 8 together with FIG. 7, which was previously referred to, to describe a battery module structure according to an embodiment of the present invention, in which coupling / fixing of the electrode lead 11 and the busbar 20 is completed by soldering. Shall be.
도 8은, 본 발명이 일 실시예에 따를 배터리 모듈의 완성된 형태를 나타내는 부분 정면도이다.8 is a partial front view showing a completed form of a battery module according to an embodiment of the present invention.
도 7 및 도 8을 참조하면, 솔더링에 의해 전극 리드(11)와 삽입 슬릿(S) 사이의 빈 공간 내에는 솔더(30)가 충진된다. 본 발명에 적용되는 이러한 솔더(30)는, 통상적으로 이용되는 솔더의 조성을 가질 수 있으며, 예를 들어 주석(Sn) 이 외에 구리(Cu), 니켈(Ni), 은(Ag) 등의 금속들 중 적어도 어느 하나를 더 포함하는 조성을 가질 수 있다.7 and 8, the solder 30 is filled in the empty space between the electrode lead 11 and the insertion slit S by soldering. Such a solder 30 applied to the present invention may have a composition of a conventionally used solder, and for example, metals such as copper (Cu), nickel (Ni), silver (Ag), etc. in addition to tin (Sn). It may have a composition further comprising at least one of.
이러한 솔더(30)는, 삽입 슬릿(S) 내에서 미리 주석(Sn) 도금층(11)(도 7 참조)이 형성된 전극 리드(11)와 금속 재질의 버스바(20)가 서로 접합되도록 하며, 이로써 복수의 배터리 셀(10)들이 안정적으로 전기적으로 연결되도록 한다.The solder 30 allows the electrode lead 11 and the bus bar 20 made of a metal material to be bonded to each other, in which the tin (Sn) plating layer 11 (see FIG. 7) is formed in the insertion slit S in advance. This allows the plurality of battery cells 10 to be stably electrically connected.
한편, 제품의 미관적인 측면과 외부 부품과의 간섭에 의한 접합부 파손 위험 등을 고려할 때, 상기 솔더(30)는 전극 리드(11)가 외부로 노출되지 않도록 전극 리드(11)를 완전히 덮는 것이 바람직하며, 또한 전극 리드(11)와 버스바(20) 간의 결합력 극대화의 측면에서 볼 때 솔더(30)는 삽입 슬릿(30) 내의 빈 공간을 모두 충진시키는 것이 바람직하다. On the other hand, in consideration of the aesthetics of the product and the risk of breakage of the joint due to interference with external components, the solder 30 preferably covers the electrode lead 11 so that the electrode lead 11 is not exposed to the outside. In addition, in view of maximizing the bonding force between the electrode lead 11 and the bus bar 20, the solder 30 preferably fills all empty spaces in the insertion slit 30.
다음은, 상술한 바와 같은 본 발명의 일 실시예에 따른 배터리 모듈의 제조 방법에 대해서 설명하기로 한다.Next, a method of manufacturing a battery module according to an embodiment of the present invention as described above will be described.
본 발명의 일 실시예에 따른 배터리 모듈의 제조 방법은, 파우치 타입 배터리 셀(10)을 복수개 제조하는 셀 제조 단계; 제조된 복수의 배터리 셀(10)을 적층시키는 적층 단계; 버스바(20)를 제조하는 버스바 제조 단계; 배터리 셀(10)에 구비된 전극 리드(11)들에 버스바의 삽입 클립을 결합시키는 단계; 및 전극 리드(11)와 버스바(20)가 전기적으로 연결되도록 솔더링을 하여 삽입 슬릿(S) 내에 솔더(30)를 충진시키는 솔더링 단계;를 포함한다.Method of manufacturing a battery module according to an embodiment of the present invention, the cell manufacturing step of manufacturing a plurality of pouch type battery cell 10; A stacking step of stacking a plurality of manufactured battery cells 10; A busbar manufacturing step of manufacturing the busbar 20; Coupling the insertion clip of the bus bar to the electrode leads 11 provided in the battery cell 10; And a soldering step of filling the solder 30 in the insertion slit S by soldering the electrode lead 11 and the bus bar 20 to be electrically connected to each other.
상기 삽입 단계는, 상기 전극 리드를 삽입 클립에 형성된 삽입 슬릿 내에 삽입시키는 단계에 해당한다.The inserting step corresponds to inserting the electrode lead into an insertion slit formed in the insertion clip.
또한, 상기 솔더링 단계는, 솔더링 공정이 원활하게 이루어지도록 하기 위해 삽입 슬릿 내에 위치한 전극 리드(11)의 표면에 주석을 코팅하는 공정을 진행한 이 후에 진행되는 것일 수 있다.In addition, the soldering step may be performed after the process of coating the tin on the surface of the electrode lead 11 located in the insertion slit to facilitate the soldering process.
이상에서 본 발명은 비록 한정된 실시예와 도면에 의해 설명되었으나, 본 발명은 이것에 의해 한정되지 않으며 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자에 의해 본 발명의 기술사상과 아래에 기재될 특허청구범위의 균등범위 내에서 다양한 수정 및 변형이 가능함은 물론이다.Although the present invention has been described above by means of limited embodiments and drawings, the present invention is not limited thereto and will be described below by the person skilled in the art to which the present invention pertains. Of course, various modifications and variations are possible within the scope of the claims.

Claims (9)

  1. 전극 리드를 구비하는 복수의 배터리 셀;A plurality of battery cells having electrode leads;
    상기 복수의 배터리 셀 각각의 전극 리드가 삽입되는 삽입 슬릿을 구비하는 복수의 리드 클립이 서로 연결되어 형성되는 버스바; 및A bus bar in which a plurality of lead clips having insertion slits into which electrode leads of each of the plurality of battery cells are inserted are connected to each other; And
    상기 전극 리드와 삽입 슬릿 내벽면 사이의 빈 공간을 충진시켜 전극 리드와 버스바를 전기적으로 연결시키는 솔더;A solder filling the empty space between the electrode lead and the inner wall surface of the insertion slit to electrically connect the electrode lead and the bus bar;
    를 포함하는 배터리 모듈.Battery module comprising a.
  2. 제1항에 있어서,The method of claim 1,
    상기 리드 클립은,The lead clip,
    상기 삽입 슬릿의 일측에 형성된 개방부를 구비하는 것을 특징으로 하는 배터리 모듈.Battery module comprising an opening formed on one side of the insertion slit.
  3. 제2항에 있어서,The method of claim 2,
    상기 개방부는,The opening portion,
    상기 삽입 슬릿의 내측으로부터 외측으로 향할수록 폭이 더 넓어지도록 테이퍼진 형상을 갖는 것을 특징으로 하는 배터리 모듈.Battery module characterized in that it has a tapered shape so that the width becomes wider from the inner side to the outer side of the insertion slit.
  4. 제2항에 있어서,The method of claim 2,
    상기 리드 클립은 일측에 형성되는 고정단과 타측에 형성되어 상기 삽입 슬릿의 폭을 넓히고 좁히는 방향으로 유동 되는 자유단을 구비하며,The lead clip has a fixed end formed on one side and a free end formed on the other side to flow in the direction of widening and narrowing the width of the insertion slit,
    복수의 리드 클립 상호간은 상기 자유단끼리 연결되는 것을 특징으로 하는 배터리 모듈.A plurality of lead clips are mutually connected between the free ends of the battery module.
  5. 제1항에 있어서,The method of claim 1,
    상기 배터리 셀은,The battery cell,
    한 쌍의 전극 리드가 서로 반대 방향으로 인출된 형태를 갖는 것을 특징으로 하는 배터리 모듈.A battery module, characterized in that the pair of electrode leads are drawn out in opposite directions.
  6. 제5항에 있어서,The method of claim 5,
    상기 배터리 모듈은,The battery module,
    상기 복수의 배터터리 셀이 병렬로 연결되는 것을 특징으로 하는 배터리 모듈.The battery module, characterized in that the plurality of battery cells are connected in parallel.
  7. 복수의 배터리 셀을 적층시키는 적층 단계;A stacking step of stacking a plurality of battery cells;
    상기 배터리 셀에 구비된 전극 리드에 버스바의 삽입 클립을 결합시키는 단계; 및Coupling an insertion clip of a bus bar to an electrode lead provided in the battery cell; And
    상기 전극 리드가 버스바에 고정되도록 솔더링을 하여 상기 삽입 슬릿과 전극 리드 사이의 틈새에 솔더를 충진시키는 솔더링 단계;A soldering step of soldering the electrode leads to be fixed to the busbars to fill solder in the gaps between the insertion slits and the electrode leads;
    를 포함하는 배터리 모듈의 제조 방법.Method of manufacturing a battery module comprising a.
  8. 제7항에 있어서,The method of claim 7, wherein
    상기 삽입 단계는,The inserting step,
    상기 전극 리드를 삽입 클립에 형성된 삽입 슬릿 내에 삽입시키는 단계인 것을 특징으로 하는 배터리 모듈의 제조 방법.And inserting the electrode lead into an insertion slit formed in the insertion clip.
  9. 제7항에 있어서,The method of claim 7, wherein
    상기 솔더링 단계는,The soldering step,
    상기 삽입 슬릿 내에 위치한 전극 리드의 표면에 주석을 코팅하는 공정 이 후에 진행되는 것을 특징으로 하는 배터리 모듈의 제조 방법.And a process of coating tin on a surface of an electrode lead positioned in the insertion slit.
PCT/KR2018/000136 2017-06-13 2018-01-03 Battery module having improved connection structure between electrode leads and bus bar WO2018230796A1 (en)

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