WO2016043367A1 - Procédé et appareil pour la production de plaque de borne de batterie pour véhicule au moyen d'un procédé de forgeage à froid - Google Patents

Procédé et appareil pour la production de plaque de borne de batterie pour véhicule au moyen d'un procédé de forgeage à froid Download PDF

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Publication number
WO2016043367A1
WO2016043367A1 PCT/KR2014/009077 KR2014009077W WO2016043367A1 WO 2016043367 A1 WO2016043367 A1 WO 2016043367A1 KR 2014009077 W KR2014009077 W KR 2014009077W WO 2016043367 A1 WO2016043367 A1 WO 2016043367A1
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WO
WIPO (PCT)
Prior art keywords
hole
molded body
forging
forming
terminal plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/KR2014/009077
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English (en)
Korean (ko)
Inventor
김창동
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Serim T&d Co Ltd
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Serim T&d Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Serim T&d Co Ltd filed Critical Serim T&d Co Ltd
Publication of WO2016043367A1 publication Critical patent/WO2016043367A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/02—Die forging; Trimming by making use of special dies ; Punching during forging
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J9/00—Forging presses
    • B21J9/02—Special design or construction
    • 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
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/218—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material
    • H01M50/22—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material of the casings or racks
    • H01M50/222—Inorganic material
    • H01M50/224—Metals
    • 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 method and apparatus for manufacturing a battery terminal plate for a vehicle by a cold forging method, and more particularly, to a terminal plate used in combination with a terminal coupled to a vehicle battery terminal by using a cold forging method
  • the present invention relates to a method for manufacturing a battery terminal plate and an apparatus for manufacturing the same.
  • the battery terminal used for a vehicle battery is assembled and used in a separate battery terminal plate.
  • the material to be processed in bulk is transferred to a plurality of presses, and then presses several times to form a basic form. After molding (press / forging), unnecessary parts are cut out (trimming), and the surface is processed to finish.
  • the conventional method for manufacturing a battery terminal plate is to be processed while moving the workpiece material to a plurality of presses, there is a problem that the processing material is, of course, a long movement path of the processing device is greatly reduced production efficiency.
  • the battery terminal plate manufactured by the conventional method for manufacturing a battery terminal plate is not uniform in size and rough on the surface, the surface coating is not uniformly coated, and as a result, when connecting or fixing the battery parts, it affects the product characteristics To provide a cause for poor product quality and increased failure rates.
  • the present invention has been made to solve the above-mentioned conventional problems, the present invention is a constant size of the battery terminal plate, the structure is dense and uniform surface, when connecting or fixing the battery components, product characteristics It is an object of the present invention to provide a method and apparatus for manufacturing a battery terminal plate for a vehicle by a cold forging method which does not affect.
  • the bottom surface of the fourth molded body is formed by forming a plurality of forging dies for producing a fifth molded body by forming a plurality of lower grooves radially about the hole.
  • the apparatus for manufacturing a battery terminal plate for a vehicle using a first molded body blanking the material to form a first projection formed on both sides of the upper surface, by cold forging to the first projection of the first molded body A first forging die set for forming a second molded body by forming a second protrusion; A second forging die set for forming a fourth molded body by forming a plurality of upper grooves radially about the hole on an upper surface of the third molded body in which the hole is processed in the second molded body;
  • the first forging die set is formed of a third forging die set for forming a fifth molded body by forming a plurality of lower grooves radially around the hole on the bottom of the fourth molded body, wherein the first forging die set has a rectangular cross-sectional shape.
  • a first punch block having a through hole formed therein, a first upper mold inserted into the through hole, and having a stepped portion formed at both sides of a bottom surface thereof, and having a groove having a predetermined width formed at each of the stepped portions;
  • the lower part is located to correspond to the first punch block, the upper surface is achieved by being composed of a first lower mold of a rectangular columnar shape forming a plane.
  • the second forging die set includes a second punch block having a through hole having a rectangular cross section, and inserted into the through hole, and having a first through hole formed through the center thereof, wherein the first through hole is formed.
  • a second punch in which a plurality of second through holes are formed radially with respect to the second punch, a through pin installed in the first through hole to be protruded downwardly, and a lower end inserted into the second through hole.
  • a second upper mold formed of a punch pin protruding to form the upper groove; The insertion hole is inserted into which the through pin is inserted, and preferably formed of a second lower mold having an air discharge hole formed to communicate with the inside of the insertion hole.
  • the third forging die set includes a third punch block in which a through hole having a rectangular cross-sectional shape is formed, and is inserted into the through hole, a first through hole is formed through a center thereof, and the first through hole is formed.
  • a third punch in which a plurality of second through holes are formed radially with respect to the through hole, a through pin installed in the first through hole to be protruded downward, and inserted into the second through hole and a bottom in a predetermined width;
  • a third upper mold formed by an insertion pin which protrudes and is inserted into the upper groove;
  • An insertion hole into which the through pin is inserted is formed, a lower block in which a plurality of punch pin through holes are radially formed around the insertion hole, and an insertion hole through which a lower portion of the lower block is inserted are formed to fit the lower block.
  • the third lower mold is provided with a plurality of punch pins which are fixed to the lifting block and the plurality of punch pin through-holes to
  • the third lower mold further includes a push block in which the punch pin is fixed and a plurality of pushers installed through the push block, and the pusher is lifted to lift the lifting block. More preferably, the punch pin protruding to the upper end of the punch pin is configured to be pulled into the punch pin through hole.
  • the manufacturing method according to the present invention comprises a blanking step of blanking the material to make a first molded body is formed with a first projection on both sides of the upper surface; A first forging step of forming a second molded body by forming a second protrusion on the first protrusion of the first molded body by a first set of forging dies; A hole processing step of forming a third molded body by forming a hole in the second molded body; A second forging step of forming a fourth molded body by forming a plurality of upper grooves radially about the hole by using a second forged mold set on an upper surface of the third molded body; A third forging step of forming a fifth molded body by forming a plurality of lower grooves radially about the hole by using a third forged mold set on the bottom of the fourth molded body; And a finishing step of sandblasting the fifth molded body to machine the surface.
  • the hole is preferably formed by any one of cutting or piercing processing selected from a drill and a tap working.
  • the material is softened by annealing heat treatment, and then the film is treated with a coating agent.
  • the present invention manufactures a material of a certain size by the cold forging method to the dimensions required for the terminal plate, the size is constant, and the structure is dense and the surface is uniform, so that even when the battery parts are connected or fixed, Since there is no influence, it is possible to provide a high quality vehicle battery terminal plate as a result.
  • FIG. 1 is a process chart showing a manufacturing method of a battery terminal plate for a vehicle by the cold forging method of the present invention
  • Figure 2 is a perspective view showing an example of blanking the material of the present invention to make a first molded body
  • FIG. 3 is a perspective view showing an example of the first forging die set of the present invention
  • Figure 4 is a perspective view showing an example of the first upper mold of the first forging die set of the present invention
  • FIG. 5 is a use state diagram showing an example in which a second molded body is manufactured using the first forged mold set of the present invention.
  • FIG. 6 is a perspective view showing an example of a second molded article of the present invention.
  • FIG. 7 is a perspective view showing an example of a hole machined in the second molded article of the present invention.
  • FIG. 8 is a perspective view showing an example of a second forging die set of the present invention.
  • FIG. 9 is an exploded perspective view showing an example of the second upper mold of the second forging mold set of the present invention.
  • FIG. 10 is a perspective view showing an example of the combined bottom of the second upper mold of the second forging mold set of the present invention.
  • FIG. 11 is a cross-sectional view showing an example of a second lower mold of the second forging mold set of the present invention.
  • FIG. 12 is a use state diagram showing an example in which the fourth molded body is manufactured using the second forged mold set of the present invention.
  • FIG. 13 is a perspective view showing an example of a fourth molded article of the present invention.
  • FIG. 14 is a perspective view showing an example of a third forging die set of the present invention.
  • 15 is an exploded perspective view showing an example of the third upper mold of the third forging mold set of the present invention.
  • 16 is an exploded perspective view showing an example of a third lower mold of the third forging mold set of the present invention.
  • 17 is a use state diagram showing an example in which the fifth molded body is manufactured using the third forged mold set of the present invention.
  • 19 is a sectional perspective view showing an example of a fifth molded article of the present invention.
  • the bottom surface of the fourth molded body is formed by forming a plurality of forging dies for producing a fifth molded body by forming a plurality of lower grooves radially about the hole.
  • the apparatus for manufacturing a battery terminal plate for a vehicle using a first molded body blanking the material to form a first projection formed on both sides of the upper surface, by cold forging to the first projection of the first molded body A first forging die set for forming a second molded body by forming a second protrusion; A second forging die set for forming a fourth molded body by forming a plurality of upper grooves radially about the hole on an upper surface of the third molded body in which the hole is processed in the second molded body;
  • the first forging die set is formed of a third forging die set for forming a fifth molded body by forming a plurality of lower grooves radially around the hole on the bottom of the fourth molded body, wherein the first forging die set has a rectangular cross-sectional shape.
  • a first punch block having a through hole formed therein, a first upper mold inserted into the through hole, and having a stepped portion formed at both sides of a bottom surface thereof, and having a groove having a predetermined width formed at each of the stepped portions;
  • the lower part is located to correspond to the first punch block, the upper surface is achieved by being composed of a first lower mold of a rectangular columnar shape forming a plane.
  • the second forging die set includes a second punch block having a through hole having a rectangular cross section, and inserted into the through hole, and having a first through hole formed through the center thereof, wherein the first through hole is formed.
  • a second punch in which a plurality of second through holes are formed radially with respect to the second punch, a through pin installed in the first through hole to be protruded downwardly, and a lower end inserted into the second through hole.
  • a second upper mold formed of a punch pin protruding to form the upper groove; The insertion hole is inserted into which the through pin is inserted, and preferably formed of a second lower mold having an air discharge hole formed to communicate with the inside of the insertion hole.
  • the third forging die set includes a third punch block in which a through hole having a rectangular cross-sectional shape is formed, and is inserted into the through hole, a first through hole is formed through a center thereof, and the first through hole is formed.
  • a third punch in which a plurality of second through holes are formed radially with respect to the through hole, a through pin installed in the first through hole to be protruded downward, and inserted into the second through hole and a bottom in a predetermined width;
  • a third upper mold formed by an insertion pin which protrudes and is inserted into the upper groove;
  • An insertion hole into which the through pin is inserted is formed, a lower block in which a plurality of punch pin through holes are radially formed around the insertion hole, and an insertion hole through which a lower portion of the lower block is inserted are formed to fit the lower block.
  • the third lower mold is provided with a plurality of punch pins which are fixed to the lifting block and the plurality of punch pin through-holes to
  • the third lower mold further includes a push block in which the punch pin is fixed and a plurality of pushers installed through the push block, and the pusher is lifted to lift the lifting block. More preferably, the punch pin protruding to the upper end of the punch pin is configured to be pulled into the punch pin through hole.
  • the manufacturing method according to the present invention comprises a blanking step of blanking the material to make a first molded body is formed with a first projection on both sides of the upper surface; A first forging step of forming a second molded body by forming a second protrusion on the first protrusion of the first molded body by a first set of forging dies; A hole processing step of forming a third molded body by forming a hole in the second molded body; A second forging step of forming a fourth molded body by forming a plurality of upper grooves radially about the hole by using a second forged mold set on an upper surface of the third molded body; A third forging step of forming a fifth molded body by forming a plurality of lower grooves radially about the hole by using a third forged mold set on the bottom of the fourth molded body; And a finishing step of sandblasting the fifth molded body to machine the surface.
  • the hole is preferably formed by any one of cutting or piercing processing selected from a drill and a tap working.
  • the material is softened by annealing heat treatment, and then the film is treated with a coating agent.
  • the present invention provides a method of manufacturing a battery terminal plate for a vehicle by a cold forging method that does not affect the product characteristics when the size of the battery terminal plate is constant, structurally dense, uniform surface, and when connecting or fixing the battery components and Regarding the manufacturing apparatus, the manufacturing apparatus according to the present invention is largely composed of the first forging die set 100, the second forging die set 200 and the third forging die set 300, wherein the first forging die set Prior to processing the material by using the 100, as shown in FIG. 2, the first molded body protrudes and formed on both sides of the upper surface by pressing and simultaneously cutting the material 10 through the blanking process as shown in FIG. 20 is manufactured, and the first molded body 20 thus manufactured is supplied to the first forged mold set 100 and processed.
  • the first forging die set Prior to processing the material by using the 100 as shown in FIG. 2
  • the first molded body protrudes and formed on both sides of the upper surface by pressing and simultaneously cutting the material 10 through the blanking process as shown in FIG. 20 is manufactured, and the first
  • the first forging die set 100 is configured to form a second projection (31) by forming a second projection (31) by cold forging on the first projection (21), as shown in Figures 3 and 4
  • the first punch block 110 is formed with a through hole 111 having a rectangular cross-sectional shape, and is inserted into the through hole 111, and a stepped portion 121 is formed on both sides of the bottom surface, and is formed on the stepped portion 121.
  • the first molded body 20 is seated on the upper surface of the first lower mold 100B, and then the first upper mold 100A is lowered to form a step of the first punch 120.
  • the second molded body 30 having the second protrusions 31 formed on both sides of the upper surface of the first molded body 20 is manufactured to correspond to the portion 121 and the groove portion 122.
  • the second forging die set 200 has an upper surface of the third molded body 40 in which the hole 41 is processed in the second molded body 30 through a cutting process or a piercing process using a drill, a tap machine, or the like.
  • the fourth molded body 50 is manufactured by forming a plurality of upper grooves 51 radially around the hole 41.
  • the second forging die set 200 is inserted into the second punch block 210 and the through hole 211, the through hole 211 is formed to form a rectangular cross-sectional shape as shown in Figure 8 to 11 And a second punch 220 having a first through hole 221 formed therethrough and a plurality of second through holes 222 radially formed around the first through hole 221, and a first through hole.
  • the punch pin 240 is inserted into the ball 221 is inserted into the through pin 230 and the second through-hole 222 is installed so that the bottom protrudes downward, the bottom protrudes a predetermined width to form the upper groove 51
  • the second upper mold (200A) and the insertion hole 250 is inserted into the through pin 230 is formed and the air discharge hole 260 is formed to communicate with the inside of the insertion hole 250 is formed It consists of two lower molds 200B.
  • the present invention when the third molded body 40 is seated on the upper part of the second lower mold 200B, and then the second upper mold 200A is lowered, a plurality of punch pins.
  • a plurality of upper grooves 51 are formed on the upper surface of the third molded body 40 by the 240, and at the same time, the upper circumference of the hole 41 corresponds to the stepped portion 231 formed in the through pin 230.
  • a stepped 52 including a curved surface (round) is formed at the same time, thereby manufacturing a fourth molded body 50 as shown in FIG.
  • the third forging die set 300 is configured to form the fifth molded body 60 by forming a plurality of lower grooves 61 radially around the hole 41 on the bottom surface of the fourth molded body 50.
  • the third forging die set 300 has a third punch block 310, the through-hole 311 is formed to form a rectangular cross-sectional shape as shown in Figure 14 to 16, and inserted into the through hole 311 And a third punch 320 through which a first through hole 321 is formed and a plurality of second through holes 322 are formed radially about the first through hole 321 and the first through hole.
  • Insertion pin 340 is inserted into the hole 321 is inserted into the through pin 330 and the second through-hole 322 is installed so that the lower end protrudes downward, and the lower end is protruded a predetermined width is inserted into the upper groove 51
  • the third upper mold 300A and the insertion hole 351 into which the through pin 330 is inserted are formed, and a plurality of punch pin through holes 352 are formed radially around the insertion hole 351.
  • the lower block 350 is formed, and the insertion hole 361 through which the lower portion of the lower block 350 is inserted is formed so that the lower block 350 is fitted to the lifting block ( 360, and a third lower mold 300B having a plurality of punch pins 371 penetrating through the plurality of punch pin through holes 352 and protruding a predetermined width to an upper portion of the lower block 350.
  • the third lower mold 300B of the present invention further includes a push block 370 to which the punch pin 371 is fixed, and a plurality of pushers 372 to pass through the push block 370. desirable.
  • the fourth molded body 50 is seated on the upper surface of the third lower mold 300B, and then the third upper mold 300A is lowered to form the fourth molded body 50.
  • a fifth molded body in which a plurality of lower grooves 61 are formed on the bottom of the fourth molded body 50 by a plurality of punch pins 371 protruding to the upper surface of the third lower mold 300B in this process. 60 is manufactured.
  • the pusher 372 is operated to elevate the lifting block 360 to thereby elevate the lifting block 360, and the punch pin 371 protrudes to the upper portion of the lower block 350.
  • the tip is introduced into the punch pin through hole 352, whereby the lower groove 61 of the fifth formed body 60 is formed by the protruding tip of the punch pin 371, and then the punch pin 371.
  • the upper and lower grooves 51 and 61 are formed on the upper and lower surfaces, respectively, and the first and second protrusions 21 and 31 protrude in two stages on both sides of the upper surface. ) Formed terminal plates.
  • the stepped portion 331 having the same shape is formed on the through pin 330 of the third upper mold 300A as in the through pin 230 of the second upper mold 200A.
  • first, second and third lower molds 100B, 200B, and 300B according to the present invention may be implemented by being fixed by a separate fixing die D, respectively.
  • the blanking step S10, the first forging step S20, the hole machining step S30, the second forging step S40, the third forging step S50, and the finishing step The manufacturing method of the terminal plate which consists of S60 is demonstrated.
  • This step is a blanking process of the material 10 to form a first molded body 20 in which the first protrusions 21 are formed on both sides of the upper surface.
  • the material 10 is softened by annealing, heat treatment, and then coating. Film treated with a treatment agent may be used.
  • the first molded body 20 having a predetermined width and thickness is manufactured for the first forging step S20, which describes the material 10.
  • the first protrusion 20 of the first molded body 20 may be manufactured using the first forging die set 100 described above with the first molded body 20 manufactured to have a predetermined width and thickness in the blanking step S10.
  • the second protrusion 31 is formed on the second protrusion 31 to manufacture the second molded body 30.
  • This step is to make a third molded body 40 by processing the hole 41 through the center of the second molded body 30 manufactured in the first forging step (S20), wherein the hole 41 is a battery post It is a configuration to be combined with.
  • any one cutting process selected from a drill and a tap machining may be selected to process the hole 41, and more preferably, the hole 41 may be formed by piercing. .
  • the hole 41 is cut through a drill or a tap, the loss of the material is large and the surface is not uniform.
  • the hole 41 is precisely sized to meet the required dimensions. It is possible to easily form the hole 41, and furthermore, there is an advantage that the surface of the hole 41 is uniform.
  • This step is a plurality of upper grooves (51) radially around the hole (41) using the second forging die set 200 described above on the upper surface of the third molded body 40 manufactured in the hole machining step (S30). ) To form a fourth molded body (50).
  • This step is a plurality of lower grooves radially around the hole 41 using the third forging die set 300 described above on the bottom of the fourth molded body 50 manufactured in the secondary forging step (S40). 61) to form a fifth molded body (60).
  • This step is a step of sandblasting the fifth molded body 60 produced in the third forging step (S50) to process the surface, by which the manufacture of the terminal plate according to the present invention is completed.
  • the present invention manufactures a material having a certain size by the cold forging method in the dimensions required for the terminal plate, and thus the battery terminal plate for a vehicle is manufactured because the size is constant and the structure is dense and the surface is uniform.
  • the present invention manufactures a material of a certain size by the cold forging method to the dimensions required for the terminal plate, the size is constant, and the structure is dense and the surface is uniform, so that even when the battery parts are connected or fixed, Since there is no influence, it is possible to provide a high quality vehicle battery terminal plate as a result.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Forging (AREA)

Abstract

La présente invention concerne un procédé et un appareil pour la production d'une plaque de borne de batterie pour un véhicule au moyen d'un procédé de forgeage à froid, l'appareil, qui utilise un premier corps formé (20) formé par découpage du matériau pour former des premières saillies (21) sur les deux côtés de la surface supérieure pour produire une plaque de borne de batterie pour un véhicule, comprenant : un premier ensemble de moules de forgeage (100) pour la production d'un deuxième corps formé (30) par la formation, au moyen d'un forgeage à froid, de secondes saillies (31) sur les premières saillies (21) du premier corps formé (20) ; un deuxième ensemble de moules de forgeage (200) pour la production d'un quatrième corps formé (50) par formation de manière radiale d'une pluralité de rainures supérieures (51) par rapport à un trou (41) sur la surface supérieure d'un troisième corps formé (40) qui est le deuxième corps formé (30) sur lequel le trou (41) a été usiné ; et un troisième ensemble de moules de forgeage (300) pour la production d'une cinquième corps formé (60) par formation de manière radiale d'une pluralité de rainures inférieures (61) par rapport au trou (41) sur la surface inférieure du quatrième corps formé (50). Grâce à une telle structure, la présente invention permet de produire, au moyen d'un procédé de forgeage à froid, une plaque de borne de batterie pour un véhicule ayant des mesures précises et une précision de structure.
PCT/KR2014/009077 2014-09-18 2014-09-29 Procédé et appareil pour la production de plaque de borne de batterie pour véhicule au moyen d'un procédé de forgeage à froid Ceased WO2016043367A1 (fr)

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KR10-2014-0124139 2014-09-18
KR1020140124139A KR101630177B1 (ko) 2014-09-18 2014-09-18 냉간단조법에 의한 차량용 배터리 터미널 플레이트의 제조방법 및 제조장치

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KR102646493B1 (ko) 2023-10-17 2024-03-12 주식회사 부광정공 전기차 배터리 셀 연결용 단자의 제조방법
KR102646502B1 (ko) 2023-10-17 2024-03-12 주식회사 비앤케이테크 전기차 배터리 셀 연결용 단자의 제조장치

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