WO2017104109A1 - Bloc de batteries et procédé de production de bloc de batteries - Google Patents

Bloc de batteries et procédé de production de bloc de batteries Download PDF

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Publication number
WO2017104109A1
WO2017104109A1 PCT/JP2016/004928 JP2016004928W WO2017104109A1 WO 2017104109 A1 WO2017104109 A1 WO 2017104109A1 JP 2016004928 W JP2016004928 W JP 2016004928W WO 2017104109 A1 WO2017104109 A1 WO 2017104109A1
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WO
WIPO (PCT)
Prior art keywords
circuit board
battery pack
secondary battery
lead
lead wires
Prior art date
Application number
PCT/JP2016/004928
Other languages
English (en)
Japanese (ja)
Inventor
文哉 松下
淳史 高田
Original Assignee
三洋電機株式会社
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 三洋電機株式会社 filed Critical 三洋電機株式会社
Priority to CN201680071261.XA priority Critical patent/CN108292721B/zh
Priority to JP2017556321A priority patent/JP6965164B2/ja
Publication of WO2017104109A1 publication Critical patent/WO2017104109A1/fr

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Classifications

    • 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
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
    • 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
    • H01M50/284—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with incorporated circuit boards, e.g. printed circuit boards [PCB]
    • 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
    • H01M50/298—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the wiring of battery packs
    • 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
    • H01M50/10—Primary casings; Jackets or wrappings
    • 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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
    • 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 pack in which a circuit board is connected to a secondary battery cell, and more particularly to a battery pack in which a plurality of lead wires are connected to a circuit board and pulled out to the outside, and a manufacturing method thereof.
  • battery packs equipped with chargeable / dischargeable secondary battery cells are required as their power sources.
  • Some of such battery packs have a plurality of lead wires led out to perform power supply and signal transmission with a portable device or the like.
  • the plurality of lead lines are generally composed of positive and negative power lines and signal lines, and are provided with connectors for connection at the ends.
  • This battery pack is connected to the portable device via this connector.
  • the battery pack including the lead wire does not need to be provided with a connector on the battery pack and to connect the lead wire to the connector. Therefore, it is not necessary to connect the battery pack and the lead wire with a connector, and adverse effects such as poor connector contact can be prevented.
  • a battery pack in which a plurality of lead wires are connected to the circuit board and pulled out from the resin mold part is difficult to mold the resin mold part for insert-molding the circuit board, and defective products are generated in this process. Probability increases. This is because when the circuit board is temporarily fixed and the mold is closed, the lead wire is pinched by the mold and is damaged.
  • FIG. 21 is a front view showing a conventional battery pack manufacturing process, in which the mold 140 is clamped with the lead wire 106 interposed therebetween. It is necessary to seal the molding chamber of the mold 140 with the upper and lower molds 140 sandwiching the leader line 106 so that the molten resin to be injected does not leak. The lead wire 106 connected to the circuit board is drawn out to the outside of the molding chamber while being temporarily fixed to the die 140, so that there is no gap between the die 140 and the lead wire 106. It is necessary to tighten. In order to realize this, the mold 140 of FIG. 21 is provided with a plurality of rows of guide grooves 141 for guiding the lead wire 106 in the lower mold 140A.
  • the guide groove 141 has a semicircular shape along the leader line 106 at the groove bottom.
  • the upper mold 140 ⁇ / b> B is provided with a plurality of rows of protruding ridges 142 to be inserted into the guide grooves 141, and the tip surface of the protruding ridge 142 is formed in a semicircular shape.
  • the lead wire 106 is placed in a fixed position by inserting it into the guide groove 141, and the protrusion 142 is inserted into the guide groove 141 so that the top and bottom of the lead wire 106 are sandwiched between the upper die 140B and the lower die 140A.
  • the mold 140 is in close contact with the surface of the leader line 106.
  • the metal mold 140 of FIG. 21 guides the lead wire 106 to the guide groove 141 of the lower die 140A whose upper surface is comb-shaped, and seals the upper die 140B in the lower die 140A, so that the lead wire 106 is formed without a gap.
  • the lead wire 106 may be damaged when the die is clamped.
  • the resin mold part is formed with the metal mold 140 sandwiching the lead wire 106, molten resin leaks from between the lead wire 5 and the metal mold 140, or the lead wire 106 sandwiched between the metal mold 140 is damaged.
  • the battery pack becomes a defective product. If a defective product is generated in this process, all parts including the secondary battery cell become unusable, resulting in an extremely large economic loss.
  • the tip portion is soldered to the circuit board while specifying the lead length for each lead wire. For this reason, it takes time and labor to solder a plurality of lead wires to a fixed position of the circuit board, and there has been a problem that it cannot be efficiently manufactured.
  • the connection length is specified for each leader line, the connection position may be slightly shifted. In this case, an error occurs in the lead-out amount of the leader lines, and the arrangement of the leader lines is unbalanced. The appearance sometimes worsened.
  • the present invention has been made in view of such a conventional background.
  • One object of the present invention is to provide a battery pack that can easily and easily place a plurality of lead wires at a predetermined amount while accurately arranging a tip portion connected to the circuit board at a predetermined position. And providing a manufacturing method thereof.
  • the secondary battery cell 1, the circuit board 5 electrically connected to the secondary battery cell 1 and mounted with a protection circuit, and the circuit board 5 are provided.
  • the battery pack includes positioning mechanisms 60 and 90 for placing the lead wire 6 at a fixed position on the circuit board 5.
  • the positioning mechanisms 60 and 90 include a plurality of rows of comb-shaped ribs 61 and 91, and each lead wire 6 can be inserted between the adjacent comb-shaped ribs 61 and 91 independently.
  • a plurality of rows of guide grooves 62 and 92 capable of moving the leader line 6 along the comb-shaped ribs 61 and 91 are provided.
  • the guide grooves 62 and 92 have upper end openings 63 and 93 smaller than the outline of the leader line 6.
  • the thickness of the lead wire 6 is larger than the thickness of the core wire 6a.
  • a circuit board 5 having a plurality of lead wires 6 connected to fixed positions via positioning mechanisms 60 and 90 is embedded in an insulating molding resin, and the lead wires 6 are drawn out from the resin mold portion 4 to the outside. Yes.
  • the plurality of lead lines are arranged at fixed positions on the circuit board via the positioning mechanism, so that the plurality of lead lines are connected to the circuit board while pulling out the plurality of lead lines to a predetermined lead amount. It is possible to accurately place the leading end portion at a predetermined position on the circuit board.
  • This positioning mechanism is provided with a plurality of rows of guide grooves into which each leader line can be inserted independently between a plurality of rows of comb-shaped ribs, and the upper end opening of this guide groove is defined by the outline of the leader line. It is also small and larger than the core wire thickness of the leader line, so it can be easily inserted by pushing the leader line from the top opening and inserting it in the guide groove so that it does not come out. Can be positioned.
  • the positioning mechanisms 60 and 90 can make the interval between the guide grooves 62 and 92 substantially equal to the interval between the plurality of lead wires 6 connected to the connector 69.
  • each lead wire connected to the connector can be quickly guided to the guide groove in the vicinity of the connector. This is because a plurality of leader lines can be arranged at intervals of the guide groove via the connector, and a plurality of leader lines can be inserted into the guide groove at a distance specified by the connector.
  • the positioning mechanisms 60 and 90 can include circular grooves 64 and 94 along the outer peripheral surface of the lead wire 6 at the end portions of the guide grooves 62 and 92. With the above configuration, the gap between the circular groove and the lead wire can be narrowed, so that it is possible to effectively prevent the molten resin filled in the molding chamber from leaking from the guide groove to the outside during molding of the resin mold portion.
  • the circuit board 5 includes a plurality of connection portions 55 for connecting the leading end portions of the plurality of lead wires 6, and the positioning mechanisms 60 and 90 face the plurality of connection portions 55.
  • a plurality of guide grooves 62 and 92 can be formed in the first and second grooves.
  • the battery pack according to the present invention includes a holder case 2 that houses the secondary battery cell 1 and the circuit board 5, and the positioning mechanism 60 can be integrally formed with the holder case 2.
  • the secondary battery cell and the circuit board are housed and fixed at a fixed position of the holder case, so that the secondary battery cell and the circuit board are arranged in the same plane, and the mechanical strength is increased. Can be increased.
  • high exterior strength can be realized, and strength against dropping and bending can be increased.
  • integrally molding the positioning mechanism in the holder case the number of parts and the manufacturing process can be reduced, and mass production can be performed efficiently.
  • the battery pack of the present invention includes a positioning holder 9 made of another member that constitutes the positioning mechanism 90, and can fix the positioning holder 9 to the circuit board 5 and insert it into the resin mold portion 4.
  • the battery pack manufacturing method of the present invention is a battery pack manufacturing method for connecting a plurality of lead wires 6 to fixed positions of a circuit board 5, comprising a plurality of rows of comb-shaped ribs 61, 91 and adjacent combs.
  • a plurality of rows of guide grooves 62, 92 between the ribs 61, 91, the upper end openings 63, 93 of the guide grooves 62, 92 are smaller than the outer shape of the leader line 6, and the core wire of the leader line 6
  • Positioning mechanisms 60 and 90 having a thickness larger than 6a are provided.
  • the manufacturing method of the present invention includes an insertion step of individually inserting a plurality of leader lines 6 each having a connector 69 connected to the other ends of the plurality of rows of guide grooves 62 and 92 of the positioning mechanisms 60 and 90, and a plurality of rows.
  • the plurality of leader lines can be drawn out uniformly and to a predetermined length, and on the circuit board side, a plurality of leader lines can be drawn.
  • the leading end portions are arranged at the connection portion of the circuit board at a predetermined interval, and a plurality of lead lines can be efficiently soldered and connected to the fixed positions of the circuit board. In particular, it can be easily inserted by pushing the leader line from the top opening, but it can be moved so that it does not come out of the leader line when it is inserted in the guide groove. It can be improved.
  • the secondary battery cell the circuit board electrically connected to the secondary battery cell, and mounted with the protection circuit, and one end connected to the circuit board And a plurality of leader lines each having a connector connected to the other end.
  • the battery pack includes a positioning mechanism for arranging the leader line at a fixed position on the circuit board.
  • the positioning mechanism is provided with a plurality of rows of comb-shaped ribs, and each lead line can be inserted independently between adjacent comb-shaped ribs, and the inserted lead lines are moved along the comb-shaped ribs.
  • a plurality of possible guide grooves are provided, and the guide groove has an upper end opening smaller than the outer shape of the leader line and larger than the thickness of the core line of the leader line.
  • the battery pack has a plurality of lead wires connected to a fixed position via a positioning mechanism.
  • FIG. 3 is a cross-sectional view of the battery pack shown in FIG. 2 taken along the line III-III.
  • FIG. 4 is a cross-sectional view of the battery pack shown in FIG. 2 taken along the line IV-IV.
  • FIG. 3 is an exploded perspective view of the battery pack shown in FIG. 2. It is a top view which shows the state which set the secondary battery cell, the circuit board, and the leader line to the holder case. It is an expansion perspective view which shows an example of a secondary battery cell.
  • FIG. 7 is a cross-sectional view of the holder case shown in FIG. 6 taken along line VIII-VIII.
  • FIG. 12 is a cross-sectional view of the positioning mechanism shown in FIG. 11 taken along line XII-XII. It is an expansion perspective view of a positioning mechanism. It is a perspective view of the battery pack which concerns on other embodiment of this invention. It is a perspective view of the battery pack which concerns on other embodiment of this invention. It is a perspective view of the battery pack which concerns on other embodiment of this invention. It is a perspective view of the battery pack which concerns on other embodiment of this invention.
  • FIG. 19 is a cross-sectional view of the battery pack shown in FIG. 18 taken along the line IX-IX. It is the expansion disassembled perspective view which looked at the battery pack shown in FIG. 17 from the reverse side. It is a manufacturing process of the conventional battery pack, Comprising: It is an exploded front view which shows the state which a metal mold
  • the battery pack shown in these figures is mainly mounted on a thin portable electronic device such as a notebook computer or tablet and used as a power source for these devices.
  • the battery pack of the present invention can be used as a power source by being mounted on an electric device other than a thin portable electronic device.
  • a battery pack 100 shown in FIGS. 1 to 6 includes a thin secondary battery cell 1, a circuit board 5 electrically connected to the secondary battery cell 1 and mounted with a protection circuit, the secondary battery cell 1 and a circuit.
  • a plurality of lead wires 6 are provided which are drawn out and have a connector 69 connected to the other end.
  • the battery pack 100 shown in the figure includes two secondary battery cells 1, and these secondary battery cells 1 are disposed at both ends of the holder case 2 in an opposing posture and are opposed to each other.
  • the circuit board 5 is disposed between the cells 1, and the secondary battery cell 1 and the circuit board 5 are disposed on substantially the same plane. (Secondary battery cell 1)
  • the secondary battery cell 1 has an outer shape whose thickness is smaller than the width, and the whole is a thin rectangular battery. As shown in FIG. 7, the secondary battery cell 1 includes a bottomed cylindrical metal outer can 11 having an opening on one surface, and a sealing plate 12 that closes the opening of the outer can 11. The opening of the outer can 11 is sealed by laser welding with a flat sealing plate 12 obtained by pressing a metal plate.
  • the secondary battery cell 1 shown in the figure has curved surfaces on both sides of the outer can 11. However, for a thin secondary battery cell, not only a square battery but also a laminated battery in which electrodes are arranged inside a plastic outer film can be used.
  • the thin secondary battery cell 1 is a lithium ion secondary battery having a thickness of 3 mm to 10 mm.
  • the secondary battery cell can be a non-aqueous electrolyte secondary battery other than a lithium ion secondary battery, or any other rechargeable secondary battery such as a nickel-hydrogen battery.
  • the battery pack 100 in which the secondary battery cell 1 is a lithium ion secondary battery can increase the overall battery capacity.
  • the secondary battery cell 1 has a sealing plate 12 as a terminal surface 1X and is provided with positive and negative electrodes 10 on the terminal surface 1X.
  • a convex electrode 13 that is insulated from the sealing plate 12 is provided at the center of the sealing plate 12.
  • the convex electrode 13 provided on the sealing plate 12 is used as the first electrode 10A
  • the sealing plate 12 is used as the second electrode 10B
  • the positive and negative electrodes 10 are provided on the terminal surface 1X.
  • a clad plate 14 is fixed to one end of a sealing plate 12 to form a second electrode 10 ⁇ / b> B.
  • the secondary battery cell 1 can reliably connect the connection lead plate 16 via the clad plate 14.
  • the convex electrode 13 (first electrode 10A) is a negative electrode
  • the sealing plate 12 and the clad plate 14 (second electrode 10B) are positive electrodes.
  • the secondary battery cell 1 is provided with a safety valve 15 on the sealing plate 12.
  • the safety valve 15 opens when the internal pressure of the battery becomes higher than the set pressure, and discharges internal gas and the like to prevent the internal pressure from rising.
  • the safety valve of the secondary battery cell may be provided in the outer can. In this case, the battery pack in which the sealing plate is embedded in the resin mold portion can easily discharge the internal gas from the side surface of the outer can.
  • connection lead plate 16 for energization is connected to positive and negative electrodes 10 provided on the terminal surface 1X.
  • the secondary battery cell 1 includes a first connection lead plate 16A connected to the convex electrode 13 serving as the first electrode 10A and a second connection lead plate 16B connected to the sealing plate 12 serving as the second electrode 10B. Is connected to the circuit board 5 via The battery pack 100 shown in the figure connects two secondary battery cells 1 to a circuit board 5. The two secondary battery cells 1 are connected in series on the circuit board 5.
  • the circuit board 5 is mounted with electronic components for realizing a protection circuit for the secondary battery cell 1 and the like.
  • the protection circuit detects the temperature, voltage, current, and the like of the secondary battery cell 1 to control the charge / discharge current.
  • the protection circuit for realizing this includes a voltage detection circuit (not shown) for detecting the voltage of the secondary battery cell 1, a current detection circuit (not shown) for detecting the current, and the temperature of the secondary battery cell 1.
  • a temperature sensor (not shown) for detecting the voltage, a semiconductor switching element (not shown) such as an FET for controlling the charge / discharge current of the secondary battery cell 1, and the temperature and overcurrent of the secondary battery cell 1 are detected.
  • a protective element 7 such as a current interrupting element that operates in a mounted manner. Details of mounting of the protection element 7 on the circuit board 5 and connection thereof will be described later.
  • the circuit board 5 can be made of epoxy resin.
  • the circuit board 5 can be manufactured at low cost without using a resin reinforced with reinforcing fibers such as glass fibers. However, it can also be manufactured with an epoxy resin reinforced with glass fiber or the like.
  • the shape and size of the circuit board 5 arranged in the holder case 2 and the posture arranged in the holder case are determined according to the outer shape and size required for the battery pack. As will be described in detail later, the circuit board is formed to have an outer shape that can be placed in a board housing portion formed in the holder case.
  • the holder case 2 accommodates the secondary battery cell 1 and the circuit board 5 and arranges them in place.
  • the holder case 2 has a thin plate shape as a whole so that the thin secondary battery cell 1 and the circuit board 5 can be arranged on the same plane, and the secondary battery is provided on one side surface (the upper surface in FIGS. 2 to 6).
  • the cell 1 and the circuit board 5 are molded into a shape having a storage opening that can store the cell 1 and the circuit board 5.
  • the holder case 2 is made of a resin different from the resin for molding the resin mold portion 4, and is preferably formed of a resin having excellent heat resistance and strength, for example, a resin such as polycarbonate or ABS.
  • the holder case 2 molded from these resins can increase the dimensional accuracy of the outer shape while keeping the heat-resistant temperature at 70 ° C. or higher.
  • the holder case 2 has a battery placement area 21 where the secondary battery cells 1 are placed and a board placement area 22 where the circuit board 5 is placed on the same plane.
  • the holder case 2 shown in FIG. 6 is provided with a battery placement area 21 at both ends so that two secondary battery cells 1 can be accommodated, and a board placement area 22 between the opposed battery placement areas 21. Yes.
  • the holder case 2 having the battery placement area 21 and the board placement area 22 can easily change the outer shape of the holder case 2 by adjusting the size of the board placement area 22.
  • the external shape of the secondary battery cell 1 is specified by its standard and capacity, it is difficult to change the design such as the size in the battery placement region 21, but the substrate placement region 22 can be designed and modified with a high degree of freedom.
  • the holder case 2 can be easily adapted to an electronic device by designing and deforming the substrate arrangement region 22 to an optimal size and shape in order to realize the outer shape required for the battery pack. Furthermore, in a battery pack including a plurality of secondary battery cells, the outer shape of the holder case can be easily changed by adjusting the number of secondary battery cells to be stored and the arrangement of the battery arrangement area and the board arrangement area. Thus, it is possible to easily cope with an electronic device in which the battery pack is mounted.
  • the holder case 2 shown in FIG. 6 has a rectangular shape with the entire outer shape extending in one direction.
  • the holder case 2 has a battery placement region 21 formed at both ends in the longitudinal direction, and the overall length of the holder case 2 is adjusted with the substrate placement region 22 formed in the middle extending in the longitudinal direction. Yes.
  • the circuit board 5 extending in the longitudinal direction is arranged in the board arrangement region 22 so that both ends of the circuit board 5 are close to the terminal surface 1X of the secondary battery cells 1 arranged to face each other.
  • the holder case 2 shown in FIG. 6 has a substrate placement region 22, a resin molding region 23 in which the circuit board 5 is placed and the resin mold portion 4 is molded, and the resin mold portion 4 is molded. It is partitioned into a hollow region 24 that is not used.
  • the holder case 2 shown in the drawing is a central portion of the substrate arrangement region 22, and a region connecting the central portions of the terminal surfaces 1 ⁇ / b> X of the opposing secondary battery cells 1 is a resin molding region 23.
  • the hollow region 24 is used.
  • the resin molding region 23 and the hollow region 24 are partitioned by a partition wall 33.
  • a pair of partition walls 33 are provided along the longitudinal direction at the center of the substrate storage region 22, and a substrate storage portion 26 for storing the circuit board 5 is provided between the opposing partition walls 33. Forming.
  • the hollow region 24 is provided with a plurality of reinforcing ribs 34 that intersect vertically and horizontally in a lattice shape, and the whole is divided into a plurality of hollow chambers 28 for reinforcement.
  • the structure in which the hollow region 24 is provided in the substrate arrangement region 22 and the plurality of hollow chambers 28 are provided can reduce the manufacturing cost by reducing the insulating molding resin to be used while making the holder case 2 lightweight.
  • the holder case 2 in FIG. 6 is provided with hollow portions 24 on both sides of the substrate arrangement region 22, but the holder case can be variously changed in arrangement, shape, size, etc. of the hollow portions according to the required outer shape. it can.
  • the entire substrate arrangement area can be used as a substrate storage portion.
  • the hollow region is not provided, and the short side direction is provided between the opposing secondary battery cells. It is also possible to provide a board storage portion for storing the extended circuit board.
  • a holder case 2 shown in FIGS. 3 to 6 is provided with a peripheral wall 30 along a rectangular outer periphery, and a battery storage portion 25 for storing the secondary battery cell 1 and a substrate storage portion 26 for storing the circuit board 5 inside. And are provided.
  • the circuit board 5 is arranged in the holder case 2 as a step structure in which the bottom plate 32 serving as the bottom surface of the substrate placement region 22 is higher than the surface plate 31 serving as the bottom surface of the battery placement region 21.
  • the substrate storage part 26 is formed shallower than the battery storage part 25. This structure can reduce the amount of insulating molding resin to be used by thinly molding the resin mold portion 4 for insert molding of the circuit board 5.
  • the holder case 2 shown in the figure is provided with a plurality of projecting pieces 38 that project outward from a peripheral wall 30 provided on the outer periphery.
  • the protruding piece 38 is used as a connecting portion for connecting to an electronic device to which the battery pack 100 is attached.
  • the holder case 2 is provided with a frame portion 27 along the outer shape of the secondary battery cell 1 in the battery arrangement region 21, and the inside of the frame portion 27 serves as a battery storage portion 25.
  • the frame portion 27 includes a holding wall 35 along the terminal surface 1X of the secondary battery cell 1, a peripheral wall 30 along three sides excluding the terminal surface 1X, and a surface plate portion along one main surface 1A of the secondary battery cell 1. 31.
  • the holding wall 35 cuts a portion facing the substrate storage portion 26 to allow the battery storage portion 25 and the substrate storage portion 26 to communicate with each other.
  • the surface plate portion 31 is formed in a square ring shape along the outer peripheral edge portion of the main surface 1 ⁇ / b> A of the secondary battery cell 1 by opening the center portion.
  • the height of the peripheral wall 30 of the frame portion 27 is substantially equal to the thickness of the secondary battery cell 1 so that the secondary battery cell 1 can be stored in the battery storage portion 25.
  • the inner shape of the frame portion 27 is substantially the same as the outer shape of the secondary battery cell 1 so that the secondary battery cell 1 accommodated therein can be disposed at a fixed position.
  • the secondary battery cell 1 is housed in the frame portion 27 so that the terminal surface 1X provided with the pair of electrodes 10 faces the substrate placement portion 22.
  • the substrate storage portion 26 is formed in a space surrounded by a pair of opposed partition walls 33 and a bottom plate 32.
  • the circuit board 5 is disposed, and a molten insulating molding resin is filled therein to mold the resin mold portion 4.
  • the substrate storage unit 26 in FIG. 8 fixes the circuit board 5 in a fixed position via the coupling mechanism 19.
  • the coupling mechanism 19 shown in the figure is configured by a locking rib 36 and a locking hook 37 that are provided on the holder case 2 and locks both side edges of the circuit board 5, and a locking part 56 provided on the circuit board 5. is doing.
  • the connecting mechanism 19 specifies the position of the circuit board 5 in the left-right direction by guiding the vertical rib 36a to the slit recess 56a. Further, the coupling mechanism 19 inserts one side edge of the circuit board 5 between the horizontal rib 36 b and the bottom plate 32, and engages with a locking recess 56 b provided on the opposite side edge of the circuit board 5. The hook portion of the stop hook 37 is locked and fixed in place so as not to come out of the circuit board 5.
  • the holder case 2 shown in FIG. 5 and FIG. 6 is a resin injection for injecting a molten insulating molding resin in order to insert-mold the circuit board 5 arranged in the board storage part 26 into the resin mold part 4.
  • a guide 29 is provided in the substrate arrangement region 22.
  • the holder case 2 in FIG. 5 is provided with a passage that communicates one end (left side in the figure) of the substrate storage portion 26 with the outside to form a resin injection guide 29.
  • the resin injection guide 29 shown in FIG. 5 is partitioned from the hollow chamber 28 by an opposing passage wall 39.
  • the opening side of the substrate placement region 22 is closed with a molding die (not shown) to form a molding chamber inside the substrate storage portion 26.
  • the resin injection guide 29 has an injection hole 29a in the peripheral wall 30. When the resin is injected, the injection hole 29a is exposed to the outside in a state where the opening of the substrate arrangement region 22 is closed with a molding die. I am doing so.
  • the holder case 2 includes a second resin injection guide that communicates the opposite end of the substrate storage portion 26 with the outside. Can also be provided. Since this structure can inject the insulating molding resin from two places in the molding process of the resin mold portion, it has a feature that the insulating molding resin can be filled to every corner of the molding chamber while shortening the injection time of the insulating molding resin.
  • the resin mold part 4 embeds a part or the whole of the circuit board 5, the electronic component mounted on the circuit board 5, and the terminal surface 1 ⁇ / b> X of the secondary battery cell 1 in an insulating molding resin and fixes it in place.
  • the resin mold part 4 closes the storage opening of the holder case 2 with a molding die (not shown) in a state where the circuit board 5 and the secondary battery cell 1 are arranged at fixed positions of the holder case 2. And is molded by injecting molten insulating molding resin into the molding chamber.
  • the resin mold part 4 is molded by heating and injecting a thermoplastic resin into a molding chamber in a molten state.
  • a thermoplastic resin of the insulating molding resin a resin that can be molded by being heated to a low temperature and injected into a molding chamber at a low pressure, for example, a polyamide resin, a polyolefin-based thermoplastic resin, or a urethane-based thermoplastic resin is used.
  • the resin injected into the molding chamber at a low temperature and low pressure has a feature that does not adversely affect the mounted parts of the secondary battery cell 1 and the circuit board 5 due to heat.
  • the resin mold portion 4 shown in FIG. 2 has a plurality of rows of groove portions 41 formed on the surface.
  • the plurality of rows of groove portions 41 are provided along the longitudinal direction of the circuit board 5.
  • the structure in which the plurality of rows of groove portions 41 are provided on the surface of the resin mold portion 4 is characterized in that the manufacturing cost can be reduced by reducing the amount of the insulating molding resin to be used.
  • the plurality of rows of groove portions 41 are, for example, inner surfaces of a molding chamber for molding the resin mold portion 4 with an insulating molding resin, and by forming a plurality of rows of ridges on the surface of the molding die. realizable.
  • the molten insulating resin supplied from the resin injection guide 29 flows smoothly along the longitudinal direction of the circuit board 5 as shown by an arrow B.
  • the insulating molding resin injected into the molding chamber can be filled up to the opposite side of the injection side by flowing along a plurality of rows of ridges formed on the surface of the molding die.
  • the structure in which the molten resin is injected from the end of the molding chamber is such that fine solder scraps are generated and remain on the circuit board 5 when the lead wire 6 and the connection lead plate 16 are soldered to the circuit board 5. Even if there is, there can be improved safety because the molten resin can be pushed down to the corner of the molding chamber. Furthermore, since the resin mold portion 4 having a plurality of rows of groove portions 41 on the surface can increase the surface area on the surface side, it is possible to realize the feature of improving heat dissipation characteristics from this portion and dissipating heat. However, the resin mold portion does not necessarily need to be provided with a groove portion on the surface, and the surface can be formed in a flat shape.
  • the protection element 7 is an element that detects the temperature of the secondary battery cell 1 and cuts off the current when the detected temperature becomes higher than the set temperature, or detects the overcurrent flowing through the circuit and cuts off the current.
  • a breaker 71, a fuse 72, a PTC, etc. can be used. That is, in this specification, the protection element 7 includes a current breaker 71 such as a breaker 71, a fuse 72, and a PTC that detects a temperature rise of the secondary battery cell 1 and an overcurrent flowing through the circuit to cut off the current. Use in meaning.
  • the circuit board 5 shown in the figure is disposed at both ends in the longitudinal direction, and the breaker 71 is disposed at a position facing the terminal surface 1X of the secondary battery cell 1, and a fuse 72 is provided on one side of the central part of the circuit board 5. It is arranged.
  • the breaker 71 which is the protection element 7 is arranged for each secondary battery cell 1 built in the battery pack 100. Since the battery pack 100 shown in the figure includes two secondary battery cells 1, two breakers 71 are connected to each secondary battery cell 1. Each breaker 71 is mounted on an edge portion of the circuit board 5, and as shown in FIG. 5, as shown in FIG. 5, a secondary battery that faces the secondary battery cell 1 via a connection lead plate 16 that connects the secondary battery cell 1 to the circuit board 5. The cell 1 is connected in series.
  • the breaker 71 includes a main body 71X having a rectangular outer shape, and a pair of lead plates 71A and 71B protruding from both ends of the main body.
  • the breaker 71 shown in the figure is arranged in a state of being entirely accommodated in a notch 51 formed at an edge of the circuit board 5.
  • the circuit board 5 shown in the figure is provided with a notch 51 for accommodating the breaker 71 in a state where it is exposed on both surfaces of the circuit board 5 by notching the end edge facing the terminal surface 1X into a U shape.
  • the first connection lead plate 16 ⁇ / b> A is connected to the first connection land 52 ⁇ / b> A
  • the second connection lead plate 16 ⁇ / b> B is connected to the second connection land 52 ⁇ / b> B to electrically connect the second surface of the circuit board 5.
  • the secondary battery cell 1 is energized in the order of the planar electrode 14 ⁇ the second connection lead plate 16B ⁇ the second connection land 52B, and a plus-side output line (not shown) of the circuit board 5 is provided. ).
  • the secondary battery cell 1 on the first electrode 10 ⁇ / b> A side, power supplied from a negative output line (not shown) of the circuit board 5 is supplied from the second connection plate 53 ⁇ / b> B ⁇ lead plate 71 ⁇ / b> B ⁇ breaker 71.
  • the main body 71X ⁇ the lead plate 71A ⁇ the first connection plate 53A ⁇ the connection line 54 ⁇ the first connection land 52A ⁇ the first connection lead plate 16A ⁇ the convex electrode 13 are energized in this order and input to the secondary battery cell 1.
  • the structure in which the breaker 71 is connected to the first electrode 10A on the negative electrode side of the secondary battery cell 1 can secure the safety because the protective element 7 can be connected to the ground side.
  • the breaker can be connected to the second electrode on the positive electrode side of the secondary battery cell.
  • the lead plates 71A and 71B of the breaker 71 are connected to the circuit board 5 on the back side which is the first surface of the circuit board 5, and the secondary battery cell 1 is connected on the front side which is the second surface of the circuit board 5. Since the connection lead plate 16 drawn out from the circuit board 5 is connected to the circuit board 5, the connection lead plate 16 and the lead plates 71A and 71B come into contact with each other even when the breaker 71 and the connection lead plate 16 are brought close to each other for wiring. There is a feature that can prevent short circuit.
  • the breaker does not necessarily need to be arranged in the notch provided in the circuit board, and can be mounted on the surface of the circuit board. The breaker arranged in this way can be easily mounted on the circuit board by a method such as reflow soldering.
  • the battery pack 100 is laminated with the connection lead plate 16 in a thermally coupled state on the surface of the main body portion 71X of the breaker 71 in order to reliably detect the heat generation of the secondary battery cell 1 with the breaker 71 which is the protective element 7. is doing.
  • the first connection lead plate 16A connected to the convex electrode 13 which is the first electrode 10A is arranged in a state of being laminated on the surface of the main body 71X of the breaker 71, The main body 71X of the breaker 71 and the first connection lead plate 16A are thermally coupled.
  • the heat generated in the secondary battery cell 1 is effectively conducted to the breaker 71, and when the temperature of the secondary battery cell 1 rises to the set temperature, the heat is reliably detected by the breaker 71 and the current is cut off. I am trying to do it.
  • the first connection lead plate 16A shown in the figure is arranged in a posture intersecting with the main body portion 71X of the breaker 71, and in a state of connecting the tip end portion of the first connection lead plate 16A to the first connection land 52A, The intermediate portion of the first connection lead plate 16A is reliably brought into contact with the surface of the main body portion 71X.
  • the breaker 71 shown in the figure is arranged in the notch 51 provided in the circuit board 5, so that the surface of the main body 71 ⁇ / b> X is substantially flush with the front side surface of the circuit board 5.
  • connection lead board 16 is ideally the main body of the breaker 71. It can be laminated and brought into contact with the surface of the portion 71X.
  • connection lead plate 16 connected to the convex electrode 13 of the secondary battery cell 1 is laminated on the breaker 71.
  • the structure in which the connection lead plate 16 connected to the convex electrode 13 of the secondary battery cell 1 is thermally coupled to the breaker 71 is effective for the heat generated in the secondary battery cell from the convex electrode 13 to the breaker 71.
  • the breaker 71 can be reliably operated by conducting heat.
  • the connection lead plate connected to the sealing plate of the secondary battery cell can be laminated on the breaker to detect the heat generation of the secondary battery cell.
  • the fuse 72 which is the protective element 7 is connected between the secondary battery cells 1 connected in series, and is blown in a state where an overcurrent flows to cut off the current.
  • the fuse 72 shown in FIG. 6 is arranged in a region on one side of the central portion of the circuit board 5 and away from the resin injection guide 29 into which the molten insulating molding resin is injected. Since this structure can increase the flow distance of the molten resin supplied from the resin injection guide 29 as shown by arrows A and B in FIG. 6, it is effective that the fuse 72 is erroneously blown by the heat of the molten resin. Can be prevented.
  • the resin mold portion 4 shown in FIGS. 2 and 3 is provided with a shielding groove 42 in order to prevent the molten resin injected from the resin injection guide 29 from directly contacting the fuse 72.
  • the shielding groove 42 is formed by a shielding rib 91 (indicated by a chain line in FIG. 6) that protrudes from the inner surface of the molding die in a state where molten resin is poured into the molding chamber.
  • the shielding rib 91 shown in FIG. 6 has a U-shape in plan view, and is provided in such a posture that the inflow side of the melted insulating molding resin is closed and the opening is disposed on the opposite side.
  • the insulating molding resin supplied to the molding chamber is filled up to the periphery of the fuse 72 while bypassing the shielding rib 91 without directly contacting the fuse 72. For this reason, malfunction of a fuse is prevented by contacting the fuse 72 in a state in which the temperature is lowered to some extent without the high-temperature insulating molding resin in a molten state directly contacting the fuse 72.
  • the distance between the resin injection guide 29 and the fuse 72 can be increased to increase the flow distance of the molten resin, it is not always necessary to provide a shielding groove in the resin mold portion.
  • a plurality of lead wires 6 are connected to the circuit board 5 and are drawn out from the resin mold portion 4 to the outside.
  • One end of each of the plurality of lead wires 6 is connected to the circuit board 5, and a connector 69 is connected to the other end.
  • the lead wire 6 is embedded and fixed in an insulating molding resin with one end connected to the circuit board 5, and the circuit board 5 is drawn out from the resin molded portion 4 formed by insert molding.
  • the plurality of lead wires 6 have end portions connected to the circuit board 5 arranged at fixed positions via a positioning mechanism 60.
  • the positioning mechanism 60 shown in FIGS. 11 to 13 is integrally formed with the holder case 2.
  • the holder case 2 shown in the drawing is a part of the partition wall 33 on the outer peripheral surface of the board housing portion 26 in order to arrange the plurality of lead wires 6 at fixed positions of the circuit board 5 arranged in the board housing portion 26.
  • the positioning mechanism 60 shown in FIGS. 11 to 13 includes a plurality of rows of comb-shaped ribs 61 formed in parallel postures so that the plurality of lead lines 6 can be arranged in parallel postures at a predetermined interval.
  • a plurality of rows of guide grooves 62 are provided between the adjacent comb-shaped ribs 61 so that the lead wires 6 are inserted and arranged at fixed positions.
  • the plurality of guide grooves 62 allow the lead lines 6 to be inserted separately and independently, and the inserted lead lines 6 can be moved along the comb-shaped ribs 61.
  • the comb-shaped ribs 61 are not necessarily formed in a parallel posture, and may be appropriately inclined with respect to each other as necessary.
  • the positioning mechanism 60 shown in FIG. 13 has a plurality of rows of comb-shaped ribs 61 arranged at equal intervals to provide a plurality of rows of guide grooves 62 at equal intervals.
  • the positioning mechanism 60 inserts the lead lines 6 into the respective guide grooves 62, and arranges the lead lines 6 at regular intervals.
  • the distance between the guide grooves 62 can be made substantially equal to the distance between the lead wires 6 connected to the connector 69 at the tip.
  • the positioning mechanism 60 can promptly guide each lead wire 6 connected to the connector 69 to the guide groove 62 in the vicinity of the connector 69.
  • a plurality of lead wires 6 can be arranged at intervals of the guide groove 62 via the connector 69, the plurality of lead wires 6 can be pushed into the guide groove 62 and all the lead wires 6 can be easily inserted into the guide groove 62. Because.
  • the guide groove 62 has a depth and width into which the leader line 6 can be inserted, and the upper end opening 63 is made slightly narrower than the thickness of the leader line 6 to prevent the leader line 6 inserted therein from coming out. ing.
  • the guide groove 62 shown in FIGS. 12 and 13 is formed so that the upper end portion of the comb-shaped rib 61 protrudes inward, and the upper end opening 63 is narrowed.
  • the guide groove 62 has the opening width of the upper end opening 62 smaller than the outer shape of the lead wire 6 and larger than the thickness of the core wire 6 a of the lead wire 6.
  • the guide groove 62 can be easily inserted by pushing the leader line 6 from the upper end opening 63, and the leader line 6 is slid along the guide groove 62 when inserted in the guide groove 62. be able to.
  • the plurality of lead lines 6 can be easily inserted using a jig having a plurality of rows of protrusions along a plurality of rows of guide grooves 62 provided in the positioning mechanism 60.
  • the positioning mechanism 60 shown in FIG. 12 and FIG. 13 is a circular groove along the outer peripheral surface of the lead wire 6 on the partition wall 33 on the circuit board 5 side of the guide groove 62 and the boundary with the board housing portion 26. 64 is provided.
  • the circular groove 64 formed on the end surface on the circuit board side can narrow the gap with the lead wire 6 inserted through the circular groove 64, so that the substrate housing portion 26 that becomes a molding chamber when the resin mold portion 4 is molded is formed. It is possible to effectively prevent the molten resin to be filled from leaking from the guide groove 62 to the outside.
  • the holder case 2 shown in the drawing is provided with a lead recess 66 through which the lead wire 6 passes between the peripheral wall 30 on the side from which the lead wire 6 is drawn and the positioning mechanism 60.
  • the positioning mechanism 60 described above is configured such that the lead wire 6 can be slid in the axial direction in a state in which the lead wire 6 is inserted into each guide groove 62 from the upper end opening 63.
  • the positioning mechanism 60 inserts the lead wire 6 into the guide groove 62 in the vicinity of the connector 69 and then moves the connector 69 in a direction away from the guide groove 62 so that the length of the lead wire 6 drawn out from the holder case 2 is increased. Adjust to a predetermined length.
  • the plurality of lead wires 6 are connected to the circuit board 5 by soldering at the leading ends in a state where a predetermined length is drawn from the holder case 2.
  • the positioning mechanism 60 arranges the plurality of lead wires 6 at a constant interval in a state where the leading end portion of the lead wire 6 soldered to the circuit board 4 is moved to the connection portion with the circuit board 5.
  • the circuit board 4 is provided with a plurality of connecting portions 55 at positions where the leading ends of the lead wires 6 held by the positioning mechanism 60 at regular intervals can be soldered. Since the interval between the plurality of connecting portions 55 is equal to the interval at which the positioning mechanism 60 arranges the lead wires 6, the leading ends of the lead wires 6 are arranged in the connecting portions 55 to be soldered, and the lead wires 6 are efficiently soldered. Can be attached.
  • the plurality of lead wires 6 connected to the fixed positions of the circuit board 5 via the positioning mechanism 60 are fixed in a state where the circuit board 5 is embedded in the insulating molding resin, and are drawn out from the resin mold portion 4 to the outside.
  • the above positioning mechanism 60 is provided integrally with the holder case 2.
  • the positioning mechanism 60 can be connected and fixed to the holder case as a positioning holder that is a separate member from the holder case 2.
  • the positioning holder can have the same shape as the above-described positioning mechanism, and the holder case can be provided with a connecting portion that places the positioning holder at a fixed position.
  • the positioning holder can be placed at a fixed position of the holder case by connecting a leader line in a state where it is fixed at a fixed position of the circuit board, and then placing the circuit board in the board housing portion of the holder case. .
  • the battery pack 100 covers the periphery of the secondary battery cell 1 with the exterior sheet 8.
  • the secondary battery cell 1 housed in the frame part 27 of the holder case 2 and the frame part 27 are covered and fixed by the exterior sheet 8.
  • the exterior sheet 8 is an insulating sheet and firmly connects the frame portion 27 and the secondary battery cell 1 while insulating the outer periphery of the secondary battery cell 1.
  • the above battery pack 100 is manufactured as follows. (1) The circuit breaker 71 as the protection element 7 is connected to the circuit board 5. As shown in FIG. 5, the circuit board 5 has both ends in the longitudinal direction, and the breaker 71 is fixed to a portion facing the terminal surface 1 ⁇ / b> X of the secondary battery cell 1. As shown in FIGS. 9 and 10, the breaker 71 is disposed in the notch 51 provided at the end of the circuit board 5, and lead plates 71 ⁇ / b> A and 71 ⁇ / b> B protruding from both ends of the main body 71 ⁇ / b> X are provided on the circuit board 5. It is connected to the provided connection plate 53.
  • the circuit board 5 is placed in the holder case 2.
  • the circuit board 5 is guided to the board housing portion 26 of the holder case 2 and is set at a fixed position by a locking structure via the connecting mechanism 19 as shown in FIG.
  • a plurality of lead wires 6 each having a connector 69 connected to the other end are individually inserted into the plurality of rows of guide grooves 62 of the positioning mechanism 60 (insertion step).
  • the lead wire 6 shown in FIGS. 4 and 6 includes a connector 69 at the other end, and an intermediate portion on the connector side is inserted into the guide groove 62 of the positioning mechanism 60.
  • the plurality of leader lines 6 inserted into the plurality of rows of guide grooves 62 are simultaneously moved in the lead direction along the guide grooves 62 to adjust the lead length of the lead lines 6 (length adjustment step).
  • One end of a plurality of lead wires 6 drawn to a predetermined length is soldered to the circuit board 5 (connection process).
  • the secondary battery cell 1 is arranged in the battery storage part 25 of the holder case 2.
  • the holder case 2 shown in FIG. 5 includes frame portions 27 at both ends, and the secondary battery cells 1 are set inside the frame portions 27 and arranged at fixed positions.
  • the two secondary battery cells 1 are arranged such that the terminal surfaces 1X face each other.
  • connection lead plates 16 connected to the terminal surface 1 ⁇ / b> X of the secondary battery cell 1 are connected to the circuit board 5.
  • the secondary battery cell 1 is arranged such that the first connection lead plate 16 ⁇ / b> A connected to the first electrode 10 ⁇ / b> A is laminated on the surface of the breaker 71, and the first The second connection lead plate 16B connected to the connection land 52B and connected to the second electrode 10B is connected to the second connection land 52B of the circuit board 5.
  • the battery pack 100 described above has a structure in which the opposing secondary battery cells 1 are arranged at both ends, and the circuit board 5 is arranged between them, but the battery pack has a plurality of secondary battery cells as terminals. It is also possible to arrange the circuit boards side by side so that the surfaces are located on the same plane, and to arrange the circuit boards at positions facing the plurality of terminal surfaces.
  • the holder case 2 ⁇ / b> B is provided on the battery placement region 21 ⁇ / b> B configured by the frame portion 27 ⁇ / b> B in which one secondary battery cell 1 is placed and the terminal surface 1 ⁇ / b> X of the secondary battery cell 1.
  • a circuit board arrangement region 22B in which the circuit board 5B is arranged is provided.
  • the substrate arrangement region 22B shown in the figure is provided with only the resin molding region 23B without providing a hollow portion, and the circuit board 5B is arranged with the resin molding region 23B as the substrate storage portion 26B.
  • the holder case can also be provided with a hollow portion when the area is widened by changing the design of the substrate housing portion or the like, as indicated by a chain line in the figure.
  • the circuit board 5B shown in the figure has a shape extending in the short direction of the holder case 2B, and a breaker 71, which is a protective element 7, is mounted on the side edge facing the terminal surface 1X of the secondary battery cell 1. Yes.
  • the battery pack 200 connects a plurality of lead wires 6 to fixed positions of the circuit board 5B via a positioning mechanism 60B provided on the peripheral wall 30B of the holder case 2B, and connects the lead wires 6 to which the connector 69 is connected to the outside. It has a structure that draws out.
  • the battery pack 300 shown in FIG. 15 has a battery placement region 21C in which the holder case 2C is composed of a frame portion 27C in which two secondary battery cells 1 are placed at both ends.
  • the circuit board 5 is arranged by providing the board arrangement area 22C between the battery arrangement areas 21C.
  • the battery arrangement region 21 ⁇ / b> C has two batteries including a peripheral wall 30 ⁇ / b> C that surrounds three sides and an intermediate wall 40 that is arranged between adjacent secondary battery cells 1 so that the two secondary battery cells 1 can be accommodated.
  • a storage portion 25 is formed.
  • the substrate arrangement region 22C is formed with a resin molding region 23C in which a resin mold portion is formed and a hollow region 24C.
  • circuit board 15 is provided with the circuit board 5 between the two secondary battery cells 1 arranged in the front in the figure, and the circuit board 5 is arranged in the figure. Between the secondary battery cells 1, a circuit board is not disposed between the secondary battery cells 1, and almost the whole is a hollow region 24C.
  • the circuit board 5 is disposed at a position facing the terminal surface 1X of the two secondary battery cells 1 disposed in the front, and the two two batteries disposed in the rear.
  • the secondary battery cell 1 is structured to be connected to the circuit board 5 via the extension lead plate 17.
  • the region where the extension lead plate 17 is disposed is the resin molding region 23C, and the terminal surface 1X of the secondary battery cell 1 and the extension lead plate 17 are arranged by filling the insulating molding resin. Can be inserted and fixed in the resin mold part.
  • the battery pack of the present invention may have the structure shown in FIGS.
  • a battery pack 400 shown in FIGS. 16 to 20 includes two secondary battery cells 1, a circuit board 5D electrically connected to each of the secondary battery cells 1, and a mold in which the circuit board 5D is embedded. And a molded resin mold portion 4D.
  • the battery pack 400 shown in these drawings has a resin mold portion 4D in which the terminal surface 1X of the two secondary battery cells 1 is arranged at a position facing the circuit board 5D and the circuit board 5D is embedded. A plurality of secondary battery cells 1 arranged in the same plane are connected.
  • connection lead plate 46 welded to the convex electrode 13 which is the positive and negative electrodes 10 is embedded as an anchor portion 47 in the resin mold portion 4D.
  • the connection lead plate 46 is bent in an L shape, and one end is fixed to the convex electrode 13 of the secondary battery cell 1 and the other end is fixed to the circuit board 5D.
  • the L-shaped connection lead plate 46 is connected so that a portion protruding from the convex electrode 13 toward the circuit board 5D is embedded in the resin mold portion 4D and does not come out of the resin mold portion 4D.
  • the connecting lead plate 46 to be the anchor portion 47 can be embedded in the resin mold portion 4D by extending the entire length to provide a protruding portion, or by increasing the lateral width to provide a protruding portion.
  • the circuit board 5D is an epoxy resin reinforced with glass fiber and has sufficient strength as compared with the resin mold portion 4D.
  • the circuit board 5D is embedded in the resin mold portion 4D to reinforce the resin mold portion 4D.
  • the resin mold portion 4D is formed by temporarily fixing the circuit board 5D and the secondary battery cell 1 at a fixed position of the mold and injecting molten resin into the mold forming chamber.
  • the resin mold portion 4D embeds the circuit board 5D, insert-molds the circuit board 5D and each of the secondary battery cells 1, and connects and fixes them in place.
  • the resin mold portion 4D is molded by heating a thermoplastic resin and injecting it into a mold molding chamber in a molten state. The above-mentioned thing can be used for such a thermoplastic resin. *
  • the 17 is formed by integrally molding a wrap portion 4a extending on both surfaces of the secondary battery cell 1.
  • the wrap portion 4 a is in close contact with both surfaces of the secondary battery cell 1 to firmly connect the resin mold portion 4 ⁇ / b> D to the secondary battery cell 1.
  • the wrap part 4a is provided in the vicinity of the terminal surface 1X of the secondary battery cell 1, and is connected to the resin mold part 4D.
  • the secondary battery cell 1 is disposed on both sides of the circuit board 5D, and the circuit board 5D between the secondary battery cells 1 is embedded in the resin mold portion 4D.
  • Each of the secondary battery cells 1 arranged in the same plane is connected by the mold part 4D. Since this battery pack 400 connects the secondary battery cells 1 to both sides of the circuit board 5D, the total length is twice that of one secondary battery cell 1, but a resin mold that connects the secondary battery cells 1 on both sides. Since the portion 4D has sufficient bending strength, the strength is excellent.
  • the battery pack 400 covers the periphery of the secondary battery cell 1 with an exterior sheet 8D.
  • the battery pack 400 in FIG. 16 covers the periphery of each secondary battery cell 1 with an exterior sheet 8D.
  • the circuit board 5D connects a plurality of lead wires 6 and draws them to the outside.
  • the lead wire 6 connected to the circuit board 5D is drawn out from the resin mold portion 4D.
  • the lead wire 6 has a connector 69 connected to the tip.
  • the lead wire 6 is connected to a circuit board 5D that is insert-molded in an insulating molding resin, and is fixed by being insert-molded in the insulating molding resin.
  • the lead wire 6 is fixed in position by a positioning holder 9 in which the end connected to the circuit board 5D is molded from plastic separately from the insulating molding resin of the resin mold 4D.
  • the positioning holder 9 is used as a positioning mechanism 90.
  • the positioning holder 9 is fixed to the insulating molding resin by insert molding.
  • the positioning holder 9 as the positioning mechanism 90 includes a plurality of rows of comb-shaped ribs 91 formed in parallel postures so that the plurality of lead lines 6 can be arranged in parallel postures at predetermined intervals.
  • a plurality of rows of guide grooves 92 are provided between the comb-shaped ribs 91 to be inserted into the lead wires 6 and arranged at fixed positions.
  • the plurality of rows of guide grooves 92 allow each leader line 6 to be inserted separately and independently, and allows the inserted leader lines 6 to move along the comb-shaped ribs 91.
  • the positioning holder 9 inserts the lead lines 6 into the respective guide grooves 92, and arranges the lead lines 6 at regular intervals.
  • the guide groove 92 has a depth and a width into which the lead wire 6 can be inserted, and the opening width of the upper end opening 93 is smaller than the outer shape of the lead wire 6 and larger than the thickness of the core wire 6 a of the lead wire 6. Thus, it is difficult to pull out the inserted leader line 6.
  • the distance between the guide grooves 92 is equal to the distance between the lead wires 6 connected to the connector 69 at the tip.
  • the positioning holder 9 is moved to the end of the lead wire 6 soldered to the circuit board 5D by inserting the lead wire 6 in the vicinity of the connector 69 and then moving the connector 69 away from the positioning holder 9.
  • the circuit board 5D is provided with a plurality of connecting portions 55 at positions where the end portions of the lead wires 6 held by the positioning holder 9 at regular intervals can be soldered. Since the interval between the plurality of connecting portions 55 is equal to the interval at which the positioning holder 9 arranges the lead wires 6, the leading ends of the lead wires 6 are arranged in the connecting portions 55 to be soldered, and the lead wires 6 are efficiently soldered. Can be attached.
  • the circuit board 5D is insert-molded and fixed to the insulating molding resin.
  • the above positioning holder 9 is fixed at a fixed position on the circuit board 5D, and is arranged so that the plurality of guide grooves 92 face the plurality of connecting portions 55.
  • the positioning holder 9 shown in FIG. 20 includes a fitting recess 97 that fits the end of the circuit board 5D and fixes it in place.
  • the positioning holder 9 shown in the drawing is an interior surrounded by a bottom plate 95 and a side wall 96, and is formed with a groove-like recess extending in the horizontal direction below the comb-shaped ribs 91 arranged in a plurality of rows, and the insertion recess 97. It is said.
  • the positioning holder 9 is fixed to a fixed position of the circuit board 5 by inserting the end of the circuit board 5 into the fitting recess 97.
  • the structure in which the circuit board to which one end of the leader line is connected is inserted into the resin mold portion as a battery pack in which a plurality of leader lines having a connector connected to the tip are drawn to the outside has been described in detail.
  • the battery pack does not necessarily need to insert the circuit board into the resin mold part, and may have a structure without the resin mold part.
  • the circuit board to which the lead wire is connected can be covered with, for example, an outer case or an outer sheet. In such a battery pack as well, it is possible to accurately connect to the fixed positions of the circuit board by specifying the positions of the leading ends of the plurality of lead lines via the positioning mechanism in the same manner as described above.
  • each element constituting the present invention may be configured such that a plurality of elements are constituted by the same member and the plurality of elements are shared by one member, and conversely, the function of one member is constituted by a plurality of members. It can also be realized by sharing.
  • the battery pack of the present invention can be firmly connected by arranging the thin secondary battery cell and the circuit board on the same plane, the laptop PC or tablet which requires a thin, high voltage or high battery capacity battery pack, etc. It is suitably used for portable electronic devices.
  • connection lead plate 47 ... anchor part 51 ... notch part 52 ... connection land 52A ... first connection land 52B ... second connection land 53 ... connection plate 53A ... first connection plate 53B ... second connection plate 54 ... connection line 55 ... connection part 56 ... locking part 56a ... slit recess 56b ... locking recess 60, 60B ... positioning mechanism 61 ... comb-shaped rib 62 ... Guide groove 63 ... Upper end opening 64 ... Circular groove 66 ... Drawer recess 69 ... Connector 71 ... Breaker 71A ... Lead plate 71B ... Lead plate 71X ... Main body 7 ... fuse 90 ... positioning mechanism 91 ... comb rib 92 ... guide rib 93 ...
  • top opening 94 circular groove 95 ... bottom plate 96 ; side wall 97 ... insertion recess 99 ... shielding rib 106 ... lead wire 140 ... die 140A ... lower die 140B ... Upper die 141 ... guide groove 142 ... ridge

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

La présente invention a pour objet de disposer avec précision, à des positions prédéterminées sur une carte de circuit imprimé, les parties d'extrémité avant d'une pluralité de fils conducteurs, qui sortent d'une quantité prédéterminée, simplement et rapidement. Ce bloc de batteries comprend un élément de batterie rechargeable (1), une carte de circuit imprimé (5), une partie moulée en résine (4) et une pluralité de fils conducteurs (6) ayant chacun l'une des extrémités raccordée à la carte de circuit imprimé (5) et l'autre extrémité raccordée à un connecteur (69). Le bloc de batteries comporte un mécanisme de positionnement (60) de telle sorte que les fils conducteurs (6) soient disposés à des positions fixes sur la carte de circuit (5). Le mécanisme de positionnement (60) est pourvu d'une pluralité de colonnes de rainures de guidage (62), disposées chacune entre chaque colonne d'une pluralité de colonnes de nervures en forme de peigne (61) de telle sorte que chaque fil conducteur (6) puisse être inséré séparément et indépendamment, et les fils conducteurs insérés (6) peuvent être déplacés le long des nervures en forme de peigne (61). Les rainures de guidage (62) sont ménagées de telle sorte que chacune d'entre elles comporte une ouverture d'extrémité supérieure (63) qui est plus petite que la forme externe de chaque fil conducteur (6) et plus grande que l'épaisseur du fil central (6a) de chaque fil conducteur (6). Le bloc de batteries comporte, incorporée dans ce dernier, la carte de circuit imprimé (5) ayant la pluralité de fils conducteurs (6) reliés à des positions fixes, les fils conducteurs (6) étant sortis de la partie moulée en résine (4) vers l'extérieur.
PCT/JP2016/004928 2015-12-17 2016-11-21 Bloc de batteries et procédé de production de bloc de batteries WO2017104109A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201680071261.XA CN108292721B (zh) 2015-12-17 2016-11-21 电池组以及电池组的制造方法
JP2017556321A JP6965164B2 (ja) 2015-12-17 2016-11-21 電池パック及び電池パックの製造方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2015246417 2015-12-17
JP2015-246417 2015-12-17

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JP2008159501A (ja) * 2006-12-26 2008-07-10 Hitachi Maxell Ltd 電池パック
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017105107A1 (fr) * 2015-12-15 2017-06-22 주식회사 포스코 Matériau d'acier à haute résistance ayant d'excellentes propriétés d'impact de vieillissement sous contrainte à basse température et propriétés d'impact de zone affectée par la chaleur de soudage et procédé de fabrication de celui-ci

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CN108292721B (zh) 2021-09-21

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