WO2023232060A1 - 布线单元 - Google Patents

布线单元 Download PDF

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Publication number
WO2023232060A1
WO2023232060A1 PCT/CN2023/097353 CN2023097353W WO2023232060A1 WO 2023232060 A1 WO2023232060 A1 WO 2023232060A1 CN 2023097353 W CN2023097353 W CN 2023097353W WO 2023232060 A1 WO2023232060 A1 WO 2023232060A1
Authority
WO
WIPO (PCT)
Prior art keywords
terminal
main body
bent plate
protector
wiring unit
Prior art date
Application number
PCT/CN2023/097353
Other languages
English (en)
French (fr)
Inventor
杨文兵
白玉龙
付方凯
何亚飞
高田孝太郎
中山治
宫崎克司
望月光一郎
辻大辉
井泽贵美
中井昌之
柳原康宏
Original Assignee
远景动力技术(江苏)有限公司
远景睿泰动力技术(上海)有限公司
株式会社自动网络技术研究所
住友电装株式会社
住友电气工业株式会社
株式会社Aesc日本
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
Priority claimed from CN202210625672.6A external-priority patent/CN115032550A/zh
Application filed by 远景动力技术(江苏)有限公司, 远景睿泰动力技术(上海)有限公司, 株式会社自动网络技术研究所, 住友电装株式会社, 住友电气工业株式会社, 株式会社Aesc日本 filed Critical 远景动力技术(江苏)有限公司
Publication of WO2023232060A1 publication Critical patent/WO2023232060A1/zh

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
    • G01R1/02—General constructional details
    • G01R1/04—Housings; Supporting members; Arrangements of terminals
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/385—Arrangements for measuring battery or accumulator variables
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/396—Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
    • 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
    • H01M50/258—Modular batteries; Casings provided with means for assembling
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/569—Constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals

Definitions

  • the present disclosure relates to a wiring unit.
  • Patent Document 1 Japanese Patent Application Publication No. 2020-527848
  • the battery module described in Patent Document 1 includes: a plurality of battery cell assemblies laminated in the left and right direction, each of the battery cell assemblies having electrode leads at its front end and rear end; and a module casing configured in four directions from top to bottom, left and right.
  • the internal space formed by the side walls accommodates the battery core assembly; and the end frame is assembled at the front and rear of the battery core assembly to connect the battery core assembly with external devices.
  • Patent Document 1 Japanese Patent Publication No. 2020-527848
  • the battery cell assembly has a portion that allows the electrode leads of adjacent battery cells to be bent, overlapped, and electrically connected to each other. Since it has this portion, there is no need to provide a bus bar to connect the electrode leads to each other. , so that the electrode leads are electrically connected to the module terminals provided on the end frame.
  • the electrode leads are electrically connected to the module terminals provided on the end frame.
  • large manufacturing tolerances are likely to occur in the portions where the electrode leads are connected to each other, especially in the front-rear direction.
  • the module terminal when the electrode lead and the module terminal are connected by laser welding or the like, the module terminal may not be aligned with the electrode due to the large manufacturing tolerance in the front-rear direction of the electrode lead.
  • the leads are in full contact. In this state where the module terminal and the electrode lead are not in sufficient contact, the electrical connection between the electrode lead and the module terminal may become poor.
  • the wiring unit of the present disclosure is mounted on a battery stack in which a plurality of laminated batteries equipped with electrode leads are laminated.
  • the battery stack includes the electrode leads of the laminated batteries.
  • the wiring unit is provided with a terminal, a wire connected to the terminal, and a protector that holds the terminal and the wire.
  • the terminal is provided with a main body and a connecting portion.
  • the main body part is extended and connected oppositely to the electrode lead constituting the joint part in the first direction; and at least one bent plate part is laminated from the main body part to the lamination in the first direction.
  • the protector has: a protector main body; and at least one recessed portion recessed toward the laminated battery side in the first direction relative to the protector main body to accommodate the bent plate portion , the bent plate portion is inserted into the recessed portion and can move in the first direction, so that the connecting portion can be in contact with the electrode lead.
  • FIG. 1 is a perspective view showing the front part of the power storage module according to Embodiment 1.
  • Figure 2 is a front view of the power storage module.
  • FIG. 3 is an enlarged view showing the periphery of the terminal in FIG. 2 .
  • Fig. 4 is a cross-sectional view taken along line A-A in Fig. 2 .
  • FIG. 5 is a B-B cross-sectional view of FIG. 3 .
  • FIG. 6 is a diagram showing the first position of the terminal in the B-B cross section of FIG. 3 .
  • FIG. 7 is a diagram showing the second position of the terminal in the B-B cross section of FIG. 3 .
  • FIG. 8 is a view of the B-B cross section of FIG. 3 with the terminals omitted.
  • FIG. 9 is a CC cross-sectional view of FIG. 3 .
  • FIG. 10 is a D-D cross-sectional view of FIG. 5 .
  • FIG. 11 is a perspective view showing the periphery of the terminal accommodating portion in the electric storage module.
  • FIG. 12 is a diagram of FIG. 11 with the terminals omitted.
  • FIG. 13 is a perspective view of the front part of the battery stack.
  • FIG. 14 is a perspective view showing the main part of the laminated battery.
  • Fig. 15 is a perspective view of a terminal for connecting electric wires.
  • FIG. 16 is a perspective view showing an example of a terminal according to Embodiment 2.
  • FIG. 16 is a perspective view showing an example of a terminal according to Embodiment 2.
  • FIG. 17 is a perspective view showing an example of a terminal according to Embodiment 2 that is different from FIG. 16 .
  • FIG. 18 is a perspective view of the terminal according to Embodiment 3.
  • FIG. 18 is a perspective view of the terminal according to Embodiment 3.
  • FIG. 19 is a perspective view of the terminal according to Embodiment 4.
  • FIG. 19 is a perspective view of the terminal according to Embodiment 4.
  • FIG. 20 is a perspective view of the terminal according to Embodiment 5.
  • FIG. 20 is a perspective view of the terminal according to Embodiment 5.
  • FIG. 21 is a cross-sectional view of the power storage module, showing a cross-section corresponding to FIG. 9 in Embodiment 1.
  • FIG. 21 is a cross-sectional view of the power storage module, showing a cross-section corresponding to FIG. 9 in Embodiment 1.
  • FIG. 22 is a cross-sectional view of the power storage module, showing a cross-section corresponding to FIG. 10 in Embodiment 1.
  • FIG. 22 is a cross-sectional view of the power storage module, showing a cross-section corresponding to FIG. 10 in Embodiment 1.
  • FIG. 23 is a front view of the front part of the power storage module according to Embodiment 6.
  • FIG. 23 is a front view of the front part of the power storage module according to Embodiment 6.
  • FIG. 24 is a perspective view of a terminal according to Embodiment 6.
  • FIG. 24 is a perspective view of a terminal according to Embodiment 6.
  • Fig. 25 is a perspective view of the protector main body of (6)-(7) in Embodiment 6 and other examples.
  • FIG. 26 is an enlarged view of area D in FIG. 25 .
  • FIG. 27 is a perspective view of the terminal according to Embodiment 7.
  • FIG. 27 is a perspective view of the terminal according to Embodiment 7.
  • the wiring unit of the present disclosure is mounted on a battery stack composed of a plurality of laminated batteries equipped with electrode leads, and the electrode leads of the laminated batteries are overlapped with each other.
  • the wiring unit is provided with a terminal; a wire connected to the terminal; and a protector that holds the terminal and the wire, and the terminal is provided with a main a body part; a connection part extending from the main body part and connected oppositely to the electrode lead constituting the joint part in the first direction; and at least one bent plate part extending from the main body part to the third
  • the protector has: a protector main body; and at least one recessed portion, relative to the protector main body, toward the laminated battery side in the first direction. The recess accommodates the bent plate portion, and the bent plate portion is inserted into the recessed portion and can move in the first direction, so that the connecting portion can be in contact with the electrode lead.
  • the connecting portion can move in the first direction relative to the protector. Therefore, the connecting portion can be connected to the electrode lead constituting the joint portion. Even if there is a manufacturing tolerance in the first direction of the electrode lead, the connecting portion can be brought into contact with the electrode lead. This can improve the reliability of the electrical connection between the connecting portion and the electrode lead.
  • the terminal includes: a bent portion connecting an end edge of the main body portion and an end edge of the bent plate portion; and a folded portion connecting the main body portion, the bent portion and the bent plate portion.
  • the plate part is connected and overlaps with the main body part, the bent part and the bent plate part.
  • the strength of the curved portion can be improved by the folded portion.
  • the terminal is provided with a bent portion connecting an end edge of the main body portion and an end edge of the bent plate portion, and the thickness direction of the bent portion increases from the main body portion toward the bent plate portion.
  • the plate portion continuously changes from the first direction to a direction orthogonal to the first direction, and the curved portion is provided with a protruding portion protruding from the curved portion in the plate thickness direction of the curved portion.
  • the strength of the curved portion can be improved by the protruding portion.
  • the bent plate portion is provided with a protrusion protruding from the bent plate portion toward the inner wall of the recessed portion in a direction orthogonal to the first direction, and protruding in the first direction. Extending, the protruding portion and the protruding portion are formed continuously.
  • the protrusion part by forming the protrusion part, the portion where the bent plate part and the inner wall of the recessed part come into contact with each other can be reduced, so even if the bent plate part comes into contact with the inner wall of the recessed part, the bent plate part becomes easy to slide.
  • the protruding portion and the protruding portion are formed continuously, the protruding portion and the protruding portion are easily formed.
  • a protrusion is provided on the side wall of the recess, and the protrusion is in contact with the Said bending plate part.
  • the contact surface between the recessed portion and the bent plate portion is reduced. Compared with the case where the entire plane of the bent plate portion is in contact with the recessed portion, it is more convenient for the bent plate portion to be placed in the recessed portion. Sliding in the recess.
  • the terminal includes a plurality of bent plate portions.
  • the shape of the terminal can be easily controlled.
  • the protector includes a contact portion that contacts the terminal from the side of the laminated battery in the first direction.
  • the movement of the terminal toward the laminated battery side in the first direction can be restricted by the contact portion.
  • the protector includes a locking portion that locks with the terminal from a side opposite to the laminated battery side in the first direction.
  • the movement of the terminal to the side opposite to the laminated battery side in the first direction can be restricted by the locking portion.
  • the protector is provided with a flexible piece extending from the protector main body and capable of flexural deformation in a direction orthogonal to the first direction, and a front end portion of the flexible piece is provided with the
  • the locking portion is arranged in the recessed portion, the bent plate portion is formed with an opening penetrating the bent plate portion, and an edge portion of the opening portion is provided with a locking portion that locks with the locking portion.
  • the main body of the protector is provided with a limiting column
  • the terminal is provided with a through hole
  • the limiting column is inserted into the through hole.
  • the limiting column includes a column and a Along the height direction of the column connected to the column head, the projected area of the column head is greater than the projected area of the through hole, and the projected area of the through hole is greater than the projected area of the column.
  • the through hole on the terminal pass through the column, but also the terminal can move along the height direction of the column.
  • the limiting column and the protector body jointly limit the forward and backward movement of the terminal.
  • the terminal includes an electric wire connecting portion extending from the main body portion and connected to the electric wire, and the electric wire connecting portion includes a base portion; and a crimping piece extending from the base portion, so that The electric wire is arranged on the side of the laminated battery in the first direction with respect to the base, and is crimped by the crimping piece.
  • the electric wire is arranged closer to the laminated battery side in the first direction with respect to the base portion, it is easier to reduce the reverse flow from the main body of the electric wire connecting portion to the laminated battery side in the first direction. Side protrusion size. Thereby, the size of the wiring unit in the first direction can be reduced.
  • the terminal is provided with an extended wire connecting portion
  • the protector body is provided with a wire connecting portion accommodating portion
  • the wire connecting portion is provided in the wire connecting portion accommodating portion.
  • the terminal can be prevented from rotating during the welding process with the electrode lead, thereby improving the stability of the terminal and avoiding welding defects.
  • an arc-shaped connection part is provided on the connection part, a plurality of strip holes are opened in the arc-shaped connection part, and the arc-shaped connection part is configured to absorb the expansion amount of the electrode lead.
  • the arc-shaped connection part can absorb the displacement of the electrode lead caused by the expansion of the battery core, and avoid the problem of the terminal being pulled when the battery core expands and deforms. Risk of terminal structure instability, falling off or even breaking.
  • Embodiment 1 of the present disclosure will be described with reference to FIGS. 1 to 15 .
  • the power storage module 10 including the wiring unit 20 of this embodiment is mounted on a vehicle such as an electric vehicle or a hybrid vehicle, and is used as a driving source of the vehicle.
  • a vehicle such as an electric vehicle or a hybrid vehicle
  • the reference numerals of other components are omitted.
  • the direction indicated by the arrow line X is the front
  • the direction indicated by the arrow line Y is the left
  • the direction indicated by the arrow line Z is the upward direction.
  • the front-rear direction is an example of the first direction.
  • the power storage module 10 includes the battery stack 11L shown in FIG. 13 and the wiring unit 20 attached to the battery stack 11L as shown in FIG. 1 .
  • the power storage module 10 of this embodiment further includes a case 15 that covers the battery stack 11L from the top, bottom, left, and right sides.
  • the case 15 is composed of a bottom portion 15A disposed on the lower surface side of the battery stack 11L, a top portion 15B disposed on the upper surface side of the battery stack 11L, and a pair of side portions 15C connecting the bottom portion 15A and the top portion 15B on both left and right sides. .
  • the battery stack 11L is configured by stacking a plurality of (18 in this embodiment) laminated batteries 11 in the left-right direction.
  • the laminated battery 11 is formed in a shape that is long in the front-rear direction and flat in the left-right direction.
  • a power storage element (not shown) is accommodated inside the laminated battery 11 .
  • a pair of electrode leads 12 are arranged on both sides of the laminated battery 11 in the front-rear direction and protrude in opposite directions to each other.
  • the pair of electrode leads 12 are plate-shaped and have mutually opposite polarities.
  • the battery stack 11L is provided with a joint portion 13 for electrically connecting the four electrode leads 12 of the laminated batteries 11 continuously arranged in the left-right direction. That is, the four electrode leads 12 are bent to the left or right at a substantially right angle, overlapped, and joined by laser welding to form the joint portion 13 .
  • the electrode lead 12 constituting the joint portion 13 is the connection electrode lead 12A.
  • the two connection electrode leads 12A arranged on the right side and the two connection electrode leads 12A arranged on the left side have opposite polarities.
  • the two connecting electrode leads 12A on the right are positive electrodes
  • the two connecting electrode leads 12A on the left are negative electrodes.
  • the joint portion 13 connects the two laminated batteries 11 connected in parallel in series.
  • the battery stack 11L has four joint portions 13 at the front.
  • the battery stack 11L also has four joint portions 13 at the rear.
  • the process of forming the joint portion 13 includes bending processing, laser welding, etc. of the electrode lead 12, so the tolerance in the front-rear direction of the joint portion 13 (and the connecting electrode lead 12A) tends to increase.
  • the tolerance in the front-rear direction of the joint portion 13 (and the connecting electrode lead 12A) is about ⁇ several mm, which is about five times the thickness of the electrode lead 12 .
  • the battery stack 11L includes an output unit 14 at the left end of the front portion. Although not shown in the figure, the battery stack 11L also includes an output unit 14 at the right end of the rear portion.
  • the output portion 14 is configured by joining two electrode leads 12 that do not constitute the joining portion 13 among the electrode leads 12 .
  • the electrode lead 12 constituting the output portion 14 is referred to as the output electrode lead 12B.
  • the two output electrode leads 12B constituting one output unit 14 have the same polarity.
  • the output unit 14 constitutes the positive electrode or the negative electrode of the entire battery stack 11L. That is, for example, when the front output unit 14 is the overall positive electrode of the battery stack 11L, the rear output unit 14 is the overall negative electrode of the battery stack 11L.
  • the wiring unit 20 of this embodiment includes a terminal 30 connected to the connection electrode lead 12A, a bus bar 40 connected to the output electrode lead 12B, an electric wire 45 connected to the terminal 30, and a protector 50 holding Terminals 30, bus bars 40 and wires 45.
  • the structure of the wiring unit 20 arranged on the front side of the power storage module 10 will be described in detail.
  • the wiring unit 20 arranged on the rear side of the power storage module 10 has the same structure as the wiring unit 20 arranged on the front side of the power storage module 10 .
  • the bus bar 40 has a plate-like shape and is formed by processing a conductive metal plate. As shown in FIG. 2 , the bus bar 40 includes a first portion 40A extending in the up-down direction and a second portion 40B connected to the upper end of the first portion 40A. The first part 40A is flat in the front-rear direction. The second part 40B extends rightward from the upper end of the first part 40A and is flat in the vertical direction. The bus bar 40 is held by the bus bar holding portion 53 of the protector 50 and is connected to the output electrode lead 12B at the vertical center portion of the first portion 40A. A busbar-side connecting portion 41 is provided at the right end of the second portion 40B.
  • the busbar side connecting portion 41 has a through hole 41A through which a bolt is inserted.
  • External connection terminals (not shown) are stacked on the busbar side connecting portion 41 and are fastened to the busbar side connecting portion 41 with bolts. Thereby, the busbar-side connection part 41 is electrically connected to the external connection terminal.
  • the external connection terminal is used to connect an external device (not shown) to the power storage module 10 .
  • the electric wire 45 has a core wire 46 and an insulating cover 47 covering the core wire 46 .
  • One end of the electric wire 45 is connected to the terminal 30 .
  • the other ends of the electric wires 45 are bundled and connected to the connector 48 .
  • the electric wire 45 is wired in the wiring recess 50A of the protector 50 and is wired at a predetermined position.
  • the connector 48 includes an insulating synthetic resin housing 48A and a male terminal 48B housed in the housing 48A.
  • the connector 48 is fitted with a counterpart connector (not shown) having a female terminal.
  • the target-side connector is connected to an external ECU (Electronic Control Unit) or the like via a wire (not shown).
  • the ECU is a component equipped with a microcomputer, components, etc., and is a well-known structure equipped with functions such as detecting voltage, current, temperature, etc. of each laminated battery 11 and controlling charge and discharge of each laminated battery 11 .
  • the terminal 30 is formed by processing a conductive metal plate material.
  • the terminal 30 includes: a main body 31; a connecting part 32 extending rightward from the main body 31; a bent plate part 33 extending rearward from the lower part of the main body 31; and an electric wire connecting part 34 extending upward from the main body 31.
  • the main body portion 31 is arranged on the left side of the terminal 30 and has a rectangular shape in front view. The main body portion 31 is accommodated in the terminal accommodating portion 54 so that the plate thickness direction becomes the front-rear direction.
  • the connecting portion 32 has a rectangular shape that is long in the left-right direction, and is formed on the same plane as the main body portion 31 .
  • the connecting portion 32 protrudes upward and downward in the vertical direction relative to the main body portion 31 .
  • the connection portion 32 is formed in surface contact with the joint portion 13 or a part of the connection electrode lead 12A constituting the joint portion 13 to be connected. That is, the terminal 30 is not used to connect the adjacent connection electrode leads 12A, but is used to connect the previously connected connection electrode leads 12A. (Joint portion 13) A component connected to the electric wire 45. Therefore, the vertical dimension of the connecting portion 32 may be smaller than the vertical dimension of the connecting electrode lead 12A.
  • the bent plate portion 33 is bent substantially vertically with respect to the main body portion 31 and extends rearward.
  • the bent plate portion 33 is arranged so that the plate thickness direction becomes the up-down direction.
  • the lower end of the main body part 31 and the front end of the bent plate part 33 are connected via the bent part 35 .
  • the thickness direction of the bent portion 35 changes from the front-rear direction to the up-down direction from the main body portion 31 toward the bent plate portion 33 .
  • An opening 36 is formed through the bent plate portion 33 in the up-down direction.
  • the opening 36 is arranged at the left-right center portion of the bent plate portion 33 .
  • the lip portion on the rear side is provided as a locking receiving portion 36A.
  • the locking receiving portion 36A can be locked with the locking portion 65A of the flexure piece 62 described later.
  • the opening 36 has an expansion opening 36B that expands to the main body 31 side.
  • the electric wire connecting part 34 includes a base part 34A that is flush with the main body part 31 and crimping pieces 34B extending from both ends of the base part 34A in the left-right direction.
  • the crimping piece 34B includes a first crimping piece 34C and a second crimping piece 34D arranged at a distance from the first crimping piece 34C in the up-down direction.
  • the first crimping piece 34C is arranged on the main body portion 31 side of the electric wire connecting portion 34 and is crimped to the core wire 46 of the electric wire 45 .
  • the second crimping piece 34D is disposed at the upper end of the electric wire connecting portion 34 and is in crimp contact with the insulation cover 47 of the electric wire 45 .
  • the electric wire connecting portion 34 is simplified in the illustrations.
  • the crimping piece 34B crimps the electric wire 45 behind the base 34A.
  • the electric wire connection part 34 arranged behind the main body part 31 is arranged in the electric wire connection part accommodating part 57 mentioned later. With such a configuration, the size of the wiring unit 20 in the front-rear direction can be reduced.
  • the protector 50 is made of insulating synthetic resin and has a plate shape.
  • the protector main body 51 is provided and is positioned relative to the case 15 (and the battery stack 11L).
  • electrode accommodating recessed portions 52 are arranged in parallel in the left-right direction at the center portion of the protector main body 51 in the up-down direction.
  • the electrode accommodating recessed portion 52 is formed through in the front-rear direction and has a rectangular shape that is long up and down.
  • the electrode accommodation recess 52 is composed of a connection electrode accommodation recess 52A that receives the joint portion 13 and the connection electrode lead 12A, and an output electrode accommodation recess 52B that receives the output electrode lead 12B and the output portion. 14.
  • bus bar holding portions 53 for holding the bus bar 40 are provided on the upper and lower sides of the output electrode accommodation recess 52B.
  • a bolt tightening portion 53A for bolt tightening the bus bar 40 is provided on the right side of the upper bus bar holding portion 53 .
  • a terminal accommodating portion 54 accommodating a part of the terminal 30 is provided on the left oblique lower side of the connection electrode accommodating recess 52A.
  • the terminal accommodating portion 54 is formed to be recessed rearward from the protector main body 51 .
  • the terminal accommodating part 54 includes a main body accommodating part 55, a recessed part 56, and a wire connection part accommodating part 57.
  • the main body accommodating part 55 is arranged at a lower part of the terminal accommodating part 54 .
  • the main body accommodating part 55 has a bottom wall part 55A, a left wall part 55B extending forward from the left end part of the bottom wall part 55A, and a communication hole 55C opening to the right.
  • the communication hole 55C communicates with the connection electrode accommodation recess 52A.
  • the main body portion accommodating portion 55 accommodates the main body portion 31 of the terminal 30 . As shown in FIG.
  • the front surface of the bottom wall portion 55A is a contact portion 58 that contacts the terminal 30 from behind.
  • a portion of the main body 31 on the connecting portion 32 side is arranged in the communication hole 55C, and the connecting portion 32 is arranged inside the connecting electrode accommodation recess 52A.
  • a recessed portion 56 is formed below the main body accommodating portion 55 .
  • the recessed portion 56 is recessed rearward of the main body accommodating portion 55 .
  • the recessed portion 56 is formed through the protector 50 in the front-rear direction.
  • the inner wall 59 constituting the recess 56 includes a first inner wall 59A and a second inner wall 59B that face each other in the up-down direction, and two side walls 59C that face each other in the left-right direction.
  • the first inner wall 59A is arranged above the second inner wall 59B (on the main body accommodating portion 55 side).
  • the size between the first inner wall 59A and the second inner wall 59B is set to be equal to the thickness of the bent plate portion 33 (in the vertical direction). size), or slightly larger.
  • the size between the two side walls 59C is set to be the same as or slightly larger than the size of the bent plate portion 33 in the left-right direction.
  • the bent plate portion 33 is accommodated inside the recessed portion 56 so that the bent plate portion 33 can be in sliding contact with the inner wall 59 of the recessed portion 56 . As the bent plate portion 33 comes into sliding contact with the inner wall 59 of the recessed portion 56, as shown in FIGS. 5 to 7 and 9 , the terminal 30 can move in the front-rear direction relative to the protector body 51 .
  • a guide portion 60 is formed on the front side of the lower end portion of the bottom wall portion 55A.
  • the guide portion 60 inclines downward toward the rear.
  • the guide portion 60 guides the rear end portion of the bent plate portion 33 into the recessed portion 56 .
  • the electric wire connection part accommodating part 57 is arranged continuously above the main body part accommodating part 55 .
  • the electric wire connecting portion accommodating portion 57 is formed to be recessed toward the rear of the bottom wall portion 55A. Specifically, in a state where the main body portion 31 of the terminal 30 arranged in the terminal accommodating portion 54 is in contact with the front surface (contact portion 58) of the bottom wall portion 55A, the front surface of the wire connection portion accommodating portion 57 is set to Position it so that the electric wire connecting portion 34 does not hit it.
  • the upper part of the electric wire connection part accommodating part 57 is connected to the wiring recessed part 50A in which the electric wire 45 is wired.
  • a flexure piece receiving recessed portion 61 is formed to be recessed rearward from the protector main body 51 .
  • the second inner wall 59B between the recessed portion 56 and the flexure receiving recessed portion 61 is formed with an inlet 61A that is recessed rearward from the front end of the second inner wall 59B.
  • the recess 56 communicates with the flexure receiving recess 61 through the inlet 61A.
  • the flexure piece 62 extends upward from the lower inner wall of the flexure piece accommodation recess 61 . As shown in FIG. 12 , by arranging part of the flexure piece 62 inside the inlet 61A, the front end portion of the flexure piece 62 enters the recessed portion 56 .
  • the flexure piece 62 includes a plurality of plate portions 63 that are long in the front-rear direction and flat in the up-down direction, and a connecting portion 64 that connects two adjacent plate portions 63 .
  • the plurality of plate portions 63 include a distal end plate portion 63A disposed on the distal end side (upper side) of the flexible piece 62 and a proximal end side disposed on the proximal end side (lower side) of the flexible piece 62 . It is composed of plate portion 63B.
  • the front end side plate portion 63A and the base end side plate portion 63B are arranged to overlap each other with a gap in the up and down direction.
  • the front end portion of the front end side plate portion 63A and the front end portion of the base end side plate portion 63B are connected in a stepless manner through the arch-shaped connecting portion 64 . states are connected smoothly.
  • the rear end portion of the base end side plate portion 63B is connected to the lower inner wall of the flexure piece accommodation recess 61 .
  • the flexure piece 62 can be flexibly deformed in the up and down direction.
  • the front end side plate part 63A is provided with the locking protrusion 65 which protrudes upward from the upper surface of the front end side plate part 63A.
  • the locking protrusion 65 is arranged at the rear end portion of the front end side plate portion 63A.
  • the rear end surface of the locking protrusion 65 is formed as a locking portion 65A.
  • An inclined portion 65B is arranged on the front side of the locking protrusion 65 .
  • the inclined portion 65B is inclined upward toward the rear.
  • the locking portion 65A and the inclined portion 65B are arranged to be connected in the front-rear direction.
  • the locking protrusion 65 is arranged in the space on the front side within the recess 56 .
  • the structure of the protector 50 that accommodates the terminal 30 and the structure of the terminal 30 are as described above, and the movement of the terminal 30 relative to the protector 50 in the front-rear direction will be described below.
  • the connection portion 32 of the terminal 30 can also move in the front-rear direction to match the position of the joint portion 13 in the front-rear direction. . This ensures that the terminal 30 is in contact with the connection electrode lead 12A, and therefore the reliability of the electrical connection between the terminal 30 and the connection electrode lead 12A by laser welding can be improved.
  • the bent plate portion 33 of the terminal 30 is disposed in the recessed portion 56 of the terminal accommodating portion 54 , so that the terminal 30 can move in the front-rear direction relative to the protector 50 .
  • the terminal 30 is movable in the front-rear direction between a first position (refer to FIG. 6 ) and a second position (refer to FIG. 7 ) relative to the protector body 51 .
  • the first position is the rearmost position where the terminal 30 can move
  • the second position is the forwardmost position to which the terminal 30 can move.
  • FIG. 6 when the terminal 30 is arranged in the first position, the rear surface of the main body 31 is in contact with the contact portion 58 . Thereby, the terminal 30 is restricted from moving backward.
  • FIG. 7 when the terminal 30 is arranged in the second position, the locking receiving portion 36A of the terminal 30 is locked with the locking portion 65A of the flexure piece 62 . This restricts the terminal 30 from moving forward.
  • the length in the front-rear direction between the first position and the second position is set to be the same as or greater than the length obtained by multiplying the tolerance in the front-rear direction of the connecting electrode lead 12A by twice.
  • the intermediate position between the first position and the second position is the average position in the front-rear direction of the connecting electrode lead 12A.
  • the terminal 30 moves in the front-rear direction in accordance with the connecting electrode lead 12A. This ensures that the connection portion 32 and the connection electrode lead 12A are in close contact, so that the laser welding of the connection portion 32 and the connection electrode lead 12A can be performed satisfactorily.
  • the wiring unit 20 according to Embodiment 1 is attached to the battery stack 11L, which is composed of a plurality of laminated batteries 11 each having an electrode lead 12 .
  • the battery stack 11L includes the electrode lead of the laminated battery 11 .
  • 12 is a joint portion 13 formed by overlapping and joining each other.
  • the wiring unit 20 includes: a terminal 30; an electric wire 45 connected to the terminal 30; and a protector 50 that holds the terminal 30 and the electric wire 45.
  • the terminal 30 includes: a main body 31;
  • the connection part 32 extends from the main body part 31 and is connected oppositely to the electrode lead 12 constituting the joint part 13 in the first direction (front and rear direction); and at least one bent plate part 33 extends from the main body part 31
  • the protector 50 has: a protector main body 51; and at least one recessed portion 56.
  • the battery 11 side is recessed to accommodate the bent plate portion 33 .
  • the bent plate portion 33 is inserted into the recessed portion 56 and can move in the first direction. Therefore, the connecting portion 32 can be connected to the electrode lead 12 touch.
  • the bent plate portion 33 can be moved in the first direction by being inserted into the recessed portion 56, so that the connecting portion 32 can move in the first direction relative to the protector 50. Therefore, the connecting portion 32 and the joint portion are configured When the electrode lead 12 of 13 is connected, the connecting portion 32 can be brought into contact with the electrode lead 12 even if the electrode lead 12 has a manufacturing tolerance in the first direction. This can improve the reliability of the electrical connection between the connecting portion 32 and the electrode lead 12 .
  • the protector 50 includes the contact portion 58 that contacts the terminal 30 from the laminated battery 11 side in the first direction.
  • the contact portion 58 can restrict the movement of the terminal 30 toward the laminated battery 11 side in the first direction.
  • the protector 50 is provided with the locking part 65A, and is locked with the terminal 30 from the side (front side) opposite to the laminated battery 11 side in the first direction.
  • the movement of the terminal 30 to the side opposite to the laminated battery 11 side in the first direction can be restricted by the locking portion 65A.
  • the protector 50 is provided with the flexible piece 62 which extends from the protector main body 51 and can be flexibly deformed in the direction orthogonal to the first direction (up-and-down direction), and the front end portion of the flexible piece 62 is provided with the flexible piece 62 .
  • the locking portion 65A is arranged in the recessed portion 56.
  • the bent plate portion 33 is formed with an opening 36 penetrating the bent plate portion 33.
  • the edge of the opening 36 is provided with a locking receiving portion 36A that locks with the locking portion 65A. .
  • the terminal 30 includes an electric wire connecting portion 34 extending from the main body 31 and connected to the electric wire 45.
  • the electric wire connecting portion 34 includes a base portion 34A and a crimping piece 34B extending from the base portion 34A.
  • the electric wire 45 is arranged It is crimped to the crimping piece 34B at a position closer to the laminated battery 11 side in the first direction than the base portion 34A.
  • the electric wire 45 is disposed closer to the laminated battery 11 side in the first direction than the base portion 34A, it is easy to reduce the distance from the main body 31 of the electric wire connecting portion 34 to the first direction.
  • the protruding dimension on the side opposite to the laminated battery 11 side Thereby, the size of the wiring unit 20 in the first direction can be reduced.
  • Embodiment 2 of the present disclosure will be described with reference to FIGS. 16 and 17 .
  • the same structures as those in Embodiment 1 are denoted by the same reference numerals as in Embodiment 1, and descriptions may be omitted. In addition, description of the same functions and effects as those in Embodiment 1 will be omitted.
  • the terminal 130 according to Embodiment 2 includes two bent plate portions 33 . By increasing the number of bent plate portions 33 compared to Embodiment 1, it is easier to stabilize the movement of the terminal 130 relative to the protector 50 .
  • the two bent plate portions 33 extend in the same direction as the main body portion 31 of the terminal 130, that is, in the front-rear direction in which the terminal 130 can move.
  • the two bent plate portions 33 may be arranged on the lower side and the left side of the main body portion 31 .
  • the two bent plate portions 33 may be arranged on the lower side and the upper side of the main body portion 31 to face each other.
  • the protector 50 has recessed portions 56 at positions corresponding to the two bent plate portions 33 . That is, two recessed portions 56 are formed in the protector 50 for one terminal 130 .
  • the terminal 130 includes a plurality of (two) bent plate portions 33 .
  • the shape of the terminal 130 can be easily controlled.
  • Embodiment 3 of the present disclosure will be described with reference to FIG. 18 .
  • the same structures as those in Embodiment 1 are denoted by the same reference numerals as in Embodiment 1, and descriptions may be omitted. In addition, description of the same functions and effects as those in Embodiment 1 will be omitted.
  • the terminal 230 according to Embodiment 3 is provided with a folded-back portion 237 at the left end portion of the terminal 230 .
  • the folded portion 237 is folded so as to overlap the left end portion of the main body portion 31 , the left end portion of the curved portion 35 , and the left end portion of the bent plate portion 33 .
  • the terminal 230 is provided with: a bent portion 35 that connects the end edge of the main body portion 31 and the end edge of the bent plate portion 33; and a folded portion 237 that is connected to the main body portion 31, the bent portion 35, and the bent plate portion 33 and is connected to the main body portion 31 and the bent plate portion 33. 35 and the bent plate portion 33 overlap.
  • the folded portion 237 can improve the strength of the curved portion 35 .
  • Embodiment 4 of the present disclosure will be described with reference to FIG. 19 .
  • the same structures as those in Embodiment 1 are assigned the same reference numerals as those in Embodiment 1, and descriptions may be omitted.
  • description of the same functions and effects as those in Embodiment 1 will be omitted.
  • the terminal 330 according to Embodiment 4 includes a protruding portion 337 at the left end portion of the terminal 330 .
  • the protruding portion 337 has at least a portion protruding from the outer curved surface of the curved portion 35 in the thickness direction of the curved portion 35 .
  • the protruding portion 337 of Embodiment 4 further includes a portion protruding forward from the front surface of the main body portion 31 and a portion protruding downward from the lower surface of the bent plate portion 33 .
  • the protruding portion 337 in Embodiment 4 is formed by hammering.
  • the terminal 330 includes the bent portion 35 connecting the end edge of the main body portion 31 and the end edge of the bent plate portion 33 .
  • the thickness direction of the bent portion 35 changes from the first to the bent plate portion 33 from the main body portion 31 to the bent plate portion 33 .
  • One direction (the front-rear direction) continuously changes to a direction (up-and-down direction) orthogonal to the first direction, and the curved portion 35 is provided with a protruding portion 337 protruding from the curved portion 35 in the thickness direction of the curved portion 35 .
  • the strength of the curved portion 35 can be improved by the protruding portion 337 .
  • the terminal 430 according to the fifth embodiment includes: a protruding portion 437 protruding from the bent portion 35 like the protruding portion 337 of the fourth embodiment; and a protruding portion formed continuously with the protruding portion 437 on the bent plate portion 33 . Section 438.
  • the protruding portion 437 of the fifth embodiment is smaller in the left-right direction than the protruding portion 337 of the fourth embodiment.
  • the terminal 430 of Embodiment 5 is provided with two protrusions arranged in the left-right direction. Outlet portion 437.
  • Two protruding portions 437 are formed at the left end portion and the right end portion of the curved portion 35.
  • the protruding portion 437 has at least a portion protruding from the outer curved surface of the curved portion 35 in the thickness direction of the curved portion 35 .
  • the protruding portion 437 of Embodiment 5 further includes a portion protruding forward from the front surface of the main body 31 .
  • two protruding portions 438 are formed on the left end portion and the right end portion of the bent plate portion 33 .
  • the protrusion portion 438 is formed elongated in the front-rear direction and protrudes downward from the lower surface of the bent plate portion 33 .
  • the front end of the protrusion 438 is continuous with the lower end of the protrusion 437 .
  • the protruding portion 437 and the ridge portion 438 of the fifth embodiment are formed by reinforcing processing.
  • the protruding portion 437 and the protruding portion 438 contribute to improving the strength of the curved portion 35 in the same manner as the protruding portion 337 of the fourth embodiment.
  • the protruding portion 438 is accommodated in the recessed portion 56 of the protector 50 .
  • the protruding portion 438 is arranged to be opposed to the second inner wall 59B of the protector 50 and to be in sliding contact.
  • the entire lower surface of the bent plate portion 33 is in surface contact and sliding contact with the second inner wall 59B.
  • the lower portion of the protrusion portion 438 in the bent plate portion 33 is in sliding contact with the second inner wall 59B.
  • the inner wall 59B is in surface contact and sliding contact in a manner similar to so-called line contact.
  • Embodiment 5 compared with Embodiment 1, the frictional resistance involved in the sliding contact between the terminal 430 and the inner wall 59 of the recess 56 becomes smaller, and the terminal 430 becomes easier to move in the front-rear direction with respect to the protector body 51 move.
  • the bent plate portion 33 is provided with a protrusion portion 438 that protrudes from the bent plate portion 33 toward the inner wall 59 (second inner wall 59B) of the recessed portion 56 in a direction (downward) orthogonal to the first direction and extends along the first direction. Extending in one direction, the protruding portion 438 and the protruding portion 437 are formed continuously.
  • the protrusion portion 438 by forming the protrusion portion 438, the portion where the bent plate portion 33 and the inner wall 59 of the recessed portion 56 come into contact with each other can be reduced. Therefore, even if the bent plate portion 33 comes into contact with the inner wall 59 of the recessed portion 56, the bent plate portion 33 can be easily bent. slide. In addition, since the protruding portion 438 and the protruding portion 437 are formed continuously, the protruding portion 438 and the protruding portion 437 are easily formed.
  • Embodiment 6 will be described with reference to FIGS. 23 to 26 .
  • the same reference numerals as those in Embodiment 1 are assigned to the components, and descriptions may be omitted. In addition, description of the same functions and effects as those in Embodiment 1 will be omitted.
  • a wire connecting portion 34 extends from the terminal 30 , a wire connecting portion accommodating portion 57 is provided on the protector body 50 , and the wire connecting portion 34 is provided in the wire connecting portion accommodating portion 57 .
  • the terminal 30 can be prevented from rotating during the welding process with the electrode lead 12, thereby improving the stability of the terminal 30 and avoiding welding defects.
  • connection part 32 is provided with an arc-shaped connection part 32A, and the arc-shaped connection part 32A is configured to absorb the displacement of the electrode lead 12 . Furthermore, several strip holes are opened in the arc-shaped connection part 32A, so that the arc-shaped connection part 32A forms a comb-tooth shape, which is conducive to the deformation of the arc-shaped connection part 32A and absorbing the electrode lead 12 when the electrode lead 12 is displaced. amount of displacement.
  • the electrode lead 12 is connected to the end of the laminated battery 11.
  • the electrode lead 12 will also follow the battery core to a certain degree of displacement.
  • the arc-shaped connection portion 32A By providing the arc-shaped connection portion 32A on the connection portion 32 of the terminal 30, the arc-shaped connection portion 32A can absorb the displacement of the electrode lead 12, thus preventing the terminal 30 from being pulled and causing the terminal 30 structure when the electrode lead 12 is displaced. Risk of instability, falling off or even breaking.
  • the joint portion 13 is composed of four electrode leads 12 joined together, but it is not limited to this.
  • the bonding portion only needs to be constituted by wire bonding of a plurality of electrodes.
  • the terminal 30 is configured to have an opening 36 , and the edge of the opening 36 is provided with a locking socket. part 36A, but is not limited to this.
  • the terminal may not have an opening, but may have a locking receiving portion protruding from the bent plate portion.
  • the protector 50 is provided with the flexible piece 62 and the flexible piece 62 is provided with the locking portion 65A, but it is not limited to this.
  • the protector can also lock the terminal from the front side using a component different from the flexure piece.
  • the electric wire connecting part 34 of Embodiment 1 extends upward from the main body part 31, but may also extend downward from the main body part 31 as shown in FIGS. 23 and 24 .
  • the bent plate part 33 is located at the lower end of the main body part 31, but it may be located above the main body part 31 as shown in FIGS. 23 and 24 .
  • a protruding portion 56A is protruding from the side wall of the recessed portion 56, and the protruding portion 56A is in contact with the flat surface.
  • the protector body 50 is provided with a limiting post 66
  • the terminal 30 is provided with a limiting post 66.
  • the through hole 37 has the limiting post 66 passing through the through hole 37 .
  • the limiting column 66 includes a column 66A and a column head 66B connected to the column 66A.
  • the projected area of the column head 66B is larger than the projected area of the through hole 37
  • the projected area of the through hole 37 is larger than the projected area of the column.
  • the projected area of the body 66A is not only able to allow the through hole 37 on the terminal 30 to pass through the column 66A, but also the terminal 30 can move along the height direction of the column 66A.
  • the column head 66B and the protector body jointly protect the front and rear of the terminal 30 Move to limit.

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Abstract

提供一种端子(30)与电极引线(12,12A)的电连接可靠性优异的布线单元(20)。布线单元(20)被安装于电池堆叠体(11L)，电池堆叠体(11L)是将多个具备电极引线(12,12A,12B)的层压型电池(11)层叠构成，具备将层压型电池(11)的电极引线(12,12A)彼此重叠接合的接合部(13)，布线单元(20)具备：端子(30)；与端子(30)连接的电线(45)；以及保持端子(30)与电线(45)的保护器(50)，端子(30)具备：主体部(31)；连接部(32)，从主体部(31)延伸设置，与构成接合部(13)的电极引线(12,12A)在第一方向上对置连接；以及至少1个弯板部(33)，从主体部(31)向第一方向上的层压型电池(11)侧延伸，保护器(50)具有：保护器主体(51)；和至少1个相对于保护器主体(51)向第一方向上的层压型电池(11)侧凹陷并容纳弯板部(33)的凹部(52A)，弯板部(33)被插入凹部(52A)而能够在第一方向上移动，从而连接部(32)能够与电极引线(12,12A)接触。

Description

布线单元 技术领域
本公开内容涉及一种布线单元。
背景技术
在电动汽车、混合动力汽车等所使用的高压的电池包中通常层叠有多个电池电芯，通过布线单元串联或并联电连接。作为这样的布线单元，以往已知有日本专利特表2020-527848号公报(下述专利文献1)所记载的布线单元。专利文献1所记载的电池模组具备：沿左右方向层叠有多个的电芯组件，该电芯组件在其前端部及后端部具备电极引线；模组外壳，构成为在由上下左右四个侧壁构成的内部空间中并容纳有电芯组件；以及端架，组装于电芯组件的前后，使电芯组件与外部器件连接。
现有技术文献
专利文献
专利文献1：日本专利特表2020-527848号公报
发明内容
发明所要解决的技术问题
上述构成中，电芯组件具有使相邻的电池电芯的电极引线以相互靠近的方式弯折、重叠并电连接的部分，由于具有该部分，因此不需要设置将电极引线彼此连接的汇流排，使得电极引线与设置于端架的模组端子电连接。但是，由于电极引线的弯折加工、电极引线彼此的焊接，容易在电极引线彼此连接的部分、尤其在前后方向上产生较大的制造公差。
上述构成中，在通过激光焊接等连接电极引线和模组端子时，由于电极引线的前后方向的制造公差较大，因此有时无法使模组端子相对于电极 引线充分接触。像这样在模组端子与电极引线未充分接触的状态下，有可能导致电极引线与模组端子的电连接变得不良。
用于解决技术问题的手段
本公开内容的布线单元被安装于电池堆叠体，所述电池堆叠体是将多个具备电极引线的层压型电池层叠构成，该电池堆叠体具备将所述层压型电池的所述电极引线彼此重合并接合的接合部，所述布线单元具备：端子；电线，与所述端子连接；以及保护器，保持所述端子与所述电线，所述端子具备：主体部；连接部，从所述主体部延伸设置，与构成所述接合部的所述电极引线在第一方向上对置连接；以及至少一个弯板部，从所述主体部向所述第一方向上的所述层压型电池侧延伸，所述保护器具有：保护器主体；以及至少一个凹部，相对于所述保护器主体向所述第一方向上的所述层压型电池侧凹陷，容纳所述弯板部，所述弯板部被插入所述凹部而能够在所述第一方向上移动，从而使所述连接部能与所述电极引线接触。
发明效果
根据本公开内容，能够提供端子与电极引线的电连接可靠性优异的布线单元。
附图说明
图1是示出实施方式1涉及的蓄电模组的前部的立体图。
图2是蓄电模组的主视图。
图3是将图2中的端子周边放大示出的图。
图4是图2的A-A截面图。
图5是图3的B-B截面图。
图6是示出图3的B-B截面中端子的第一位置的图。
图7是示出图3的B-B截面中端子的第二位置的图。
图8是图3的B-B截面中省略了端子的图。
图9是图3的C-C截面图。
图10是图5的D-D截面图。
图11是示出蓄电模组中端子容纳部周边的立体图。
图12是图11中省略了端子的图。
图13是电池堆叠体的前部的立体图。
图14是示出层压型电池的主要部分的立体图。
图15是连接电线的端子的立体图。
图16是示出实施方式2涉及的端子的一例的立体图。
图17是示出与图16不同的实施方式2涉及的端子的一例的立体图。
图18是实施方式3涉及的端子的立体图。
图19是实施方式4涉及的端子的立体图。
图20是实施方式5涉及的端子的立体图。
图21是蓄电模组的截面图，是示出与实施方式1的图9对应的截面的图。
图22是蓄电模组的截面图，是示出与实施方式1的图10对应的截面的图。
图23是实施方式6涉及的蓄电模组的前部的主视图。
图24是实施方式6涉及的端子的立体图。
图25是实施方式6及其他实施例中(6)-(7)的保护器主体的立体图。
图26是图25中D区域的放大图。
图27是实施方式7涉及的端子的立体图。
具体实施方式
首先，列举本公开内容的实施方式进行说明。
(1)本公开内容的布线单元被安装于电池堆叠体，所述电池堆叠体将多个具备电极引线的层压型电池层叠构成，具备将所述层压型电池的所述电极引线彼此重合接合的接合部，所述布线单元具备：端子；电线，与所述端子连接；以及保护器，保持所述端子与所述电线，所述端子具备：主 体部；连接部，从所述主体部延伸设置，与构成所述接合部的所述电极引线在第一方向上对置连接；以及至少一个弯板部，从所述主体部向所述第一方向上的所述层压型电池侧延伸，所述保护器具有：保护器主体；以及至少一个凹部，相对于所述保护器主体向所述第一方向上的所述层压型电池侧凹陷，容纳所述弯板部，所述弯板部被插入所述凹部而能够在所述第一方向上移动，从而所述连接部可与所述电极引线接触。
根据这样的构成，通过将弯板部插入凹部使其能够在第一方向上移动，从而连接部能够相对于保护器在第一方向上移动，因此在将连接部与构成接合部的电极引线连接时，即使在电极引线的第一方向上存在制造公差的情况下，也能够使连接部与电极引线接触。由此，能够使连接部与电极引线的电连接的可靠性提高。
(2)优选地，所述端子具备：弯曲部，连接所述主体部的端缘与所述弯板部的端缘；以及折返部，与所述主体部、所述弯曲部以及所述弯板部连接，并且与所述主体部、所述弯曲部以及所述弯板部重叠。
根据这样的构成，通过折返部能够使弯曲部的强度提高。
(3)优选地，所述端子具备弯曲部，连接所述主体部的端缘与所述弯板部的端缘，所述弯曲部的板厚方向随着从所述主体部朝向所述弯板部而从所述第一方向向与所述第一方向正交的方向连续变化，所述弯曲部具备突出部，从所述弯曲部向所述弯曲部的板厚方向突出。
根据这样的构成，通过突出部能够使弯曲部的强度提高。
(4)优选地，所述弯板部具备突条部，在与所述第一方向正交的方向上从所述弯板部向所述凹部的内壁突出，并且在所述第一方向上延伸，所述突条部和所述突出部连续形成。
根据这样的构成，通过形成突条部，能够减小弯板部与凹部的内壁相互接触的部分，因此即使弯板部与凹部的内壁接触，弯板部也变得容易滑动。另外，由于突条部和突出部连续形成，因此容易形成突条部和突出部。
(5)优选地，所述凹部的侧壁上凸设有凸起部，所述凸起部抵接于所 述弯板部。
根据这样的构成，通过在凹部的侧壁上凸设有凸起部，使得凹部和弯板部的接触面减小，相对于弯板部整个平面和凹部接触的情况，更加便于弯板部在凹部内的滑动。
(6)优选地，所述端子具备多个所述弯板部。
根据这样的构成，通过形成多个弯板部，容易控制端子的形态。
(7)优选地，所述保护器具备抵接部，从所述第一方向上的所述层压型电池侧与所述端子抵接。
根据这样的构成，通过抵接部能够限制端子向第一方向上的层压型电池侧移动。
(8)优选地，所述保护器具备卡止部，从所述第一方向上与所述层压型电池侧相反的一侧与所述端子卡止。
根据这样的构成，通过卡止部能够限制端子在第一方向上向与层压型电池侧的相反侧移动。
(9)优选地，所述保护器具备挠曲片，从所述保护器主体延伸出，能够向与所述第一方向正交的方向挠曲变形，所述挠曲片的前端部具备所述卡止部，配置于所述凹部内，在所述弯板部形成有贯通所述弯板部的开口部，所述开口部的口缘部具备与所述卡止部卡止的卡止承接部。
根据这样的构成，通过设有具备卡止部的挠曲片，能够顺畅地进行弯板部向凹部的插入以及端子相对于保护器的卡止。
(10)优选地，所述保护器主体上设置有限位柱，所述端子上开设有通孔，所述限位柱穿设在所述通孔中，所述限位柱包括柱体以及与所述柱体连接的柱头，沿所述柱体的高度方向，所述柱头的投影面积大于所述通孔的投影面积，所述通孔的投影面积大于所述柱体的投影面积。
根据这样的构成，不仅能够使得端子上的通孔穿过柱体，而且端子能够沿着柱体高度的方向进行活动，限位柱和保护器主体共同对端子的前后移动进行限位。
(11)优选地，所述端子具备电线连接部，从所述主体部延伸设置，并与所述电线连接，所述电线连接部具备基部；和从所述基部延伸出的压接片，所述电线配置于相对于所述基部更靠所述第一方向上的所述层压型电池侧，被所述压接片压接。
根据这样的构成，由于电线被配置于相对于基部更靠第一方向上的层压型电池侧，因此容易减小从电线连接部的主体部向第一方向上的层压型电池侧的相反侧突出的尺寸。由此，能够减小布线单元在第一方向上的尺寸。
(12)优选地，所述端子具备延伸设置的电线连接部，所述保护器主体上设置有电线连接部容纳部，所述电线连接部设置在所述电线连接部容纳部中。
根据这样的构成，通过电线连接部和电线连接部容纳部的配合设置，使得端子在与电极引线焊接的过程中，能够避免端子旋转，提高端子的稳定性，避免焊接不良。
(13)优选地，在连接部上设置有弧形连接部，所述弧形连接部上开设有若干个条形孔，所述弧形连接部被配置为吸收所述电极引线的膨胀量。
根据这样的构成，通过在端子的连接部设置弧形连接部，使得弧形连接部能够吸收电芯膨胀时引起的电极引线的位移，避免在电芯发生膨胀变形时，端子被拉扯而出现的端子结构不稳定、脱落甚至断裂的风险。
[本公开内容的实施方式的详细说明]
以下，对本公开的实施方式进行说明。本公开内容并不限定于这些例示，而是由权利要求书所示出，其旨在包含与权利要求书等同的含义以及保护范围内的全部变更。
＜实施方式1＞
参照图1至图15对本公开内容的实施方式1进行说明。具备本实施方式的布线单元20的蓄电模组10例如搭载于电动汽车或混合动力汽车等车辆，被用作车辆的驱动来源。在以下的说明中，对于多个相同部件，有时 仅对一部分部件标注附图标记，而省略其他部件的附图标记。以下，将箭头线X所示的方向设为前方，箭头线Y所示的方向设为左方，箭头线Z所示的方向设为上方来进行说明。在本实施方式中，前后方向是第一方向的一例。
[电池堆叠体]
蓄电模组10具备：图13所示的电池堆叠体11L；和如图1所示安装于电池堆叠体11L的布线单元20。如图1所示，本实施方式的蓄电模组10还具备从上下左右的四周覆盖电池堆叠体11L的壳体15。壳体15由配置于电池堆叠体11L的下表面侧的底部15A、配置于电池堆叠体11L的上表面侧的顶部15B、以及在左右两侧连接底部15A和顶部15B的一对侧部15C构成。
[层压型电池，电极引线]
如图13所示，电池堆叠体11L通过沿左右方向层叠多个(在本实施方式中为18个)层压型电池11而构成。另外，在图13中，仅示出电池堆叠体11L的前侧部分。如图14所示，层压型电池11形成为在前后方向上较长而在左右方向上扁平的形状。在层压型电池11的内部容纳有蓄电元件(未图示)。在层压型电池11的前后方向的两侧配置有一对电极引线12，以彼此朝向相反方向的方式突出。一对电极引线12呈板状，具有彼此相反的极性。
[接合部]
如图4及图13所示，在电池堆叠体11L上设有将沿左右方向连续排列的层压型电池11的4个电极引线12电连接的接合部13。即，4个电极引线12以大致直角向左或向右弯折、重叠，通过激光焊接接合，由此构成接合部13。构成接合部13的电极引线12为连接电极引线12A。在4个连接电极引线12A中，配置于右侧的2个连接电极引线12A和配置于左侧的2个连接电极引线12A具有相反的极性。例如，右侧的2个连接电极引线12A为正极，左侧的2个连接电极引线12A为负极。由此，在电池堆叠体11L中，接合部13将并联连接的2个层压型电池11串联连接。如图13所示， 电池堆叠体11L在前部具备4个接合部13。另外，虽然未图示，但电池堆叠体11L在后部也具备4个接合部13。
在接合部13的形成工序中包括电极引线12的弯折加工、激光焊接等，因此特别是接合部13(以及连接电极引线12A)在前后方向上的公差容易变大。例如，在本实施方式中，接合部13(以及连接电极引线12A)在前后方向上的公差为±数mm左右，为电极引线12的厚度的5倍左右。
如图4及图13所示，电池堆叠体11L在前部的左端部具备输出部14。另外虽然未图示，电池堆叠体11L在后部的右端部也具备输出部14。输出部14通过将电极引线12中、不构成接合部13的2个电极引线12接合而构成。构成输出部14的电极引线12被设为输出电极引线12B。构成1个输出部14的2个输出电极引线12B具有彼此相同的极性。输出部14构成电池堆叠体11L整体的正极或负极。即，例如在前部的输出部14是电池堆叠体11L的总正极的情况下，则后部的输出部14是电池堆叠体11L的总负极。
[布线单元]
如图1所示，本实施方式的布线单元20具备：端子30，与连接电极引线12A连接；汇流排40，与输出电极引线12B连接；电线45，与端子30连接；以及保护器50，保持端子30、汇流排40和电线45。以下，对配置于蓄电模组10的前侧的布线单元20的构成进行详细说明。虽然未图示，但配置在蓄电模组10的后侧的布线单元20与配置在蓄电模组10的前侧的布线单元20同样地构成。
汇流排40呈板状的形状，通过对导电性的金属板材进行加工形成。如图2所示，汇流排40具备沿上下方向延伸的第一部分40A和与第一部分40A的上端部连接的第二部分40B。第一部分40A在前后方向上呈扁平。第二部分40B从第一部分40A的上端部向右延伸，在上下方向上呈扁平。汇流排40被保护器50的汇流排保持部53所保持，在第一部分40A的上下方向中央部与输出电极引线12B连接。在第二部分40B的右端部设有汇流排侧连接部41。
如图1所示，汇流排侧连接部41具有供螺栓插通的贯通孔41A。在汇流排侧连接部41上重叠有未图示的外部连接端子，通过螺栓紧固于汇流排侧连接部41。由此，汇流排侧连接部41与外部连接端子电连接。外部连接端子用于连接未图示的外部设备与蓄电模组10。
[电线]
如图6和图15所示，电线45具有芯线46和包覆芯线46的绝缘包覆件47。电线45的一个端部与端子30连接。如图1所示，电线45的另一端部被汇集成一束，与连接器48连接。电线45被排线于保护器50的布线凹部50A，且被排线于规定位置处。
如图2所示，连接器48具备绝缘性的合成树脂制的外壳48A和被容纳于外壳48A内部的公端子48B。连接器48与具有母端子的对象侧连接器(未图示)嵌合。对象侧连接器经由未图示的电线与外部的ECU(Electronic Control Unit：电子控制单元)等连接。ECU是搭载有微型计算机、元件等的部件，是具备用于进行各层压型电池11的电压、电流、温度等的检测、各层压型电池11的充放电控制等功能的公知构成。
[端子]
如图15所示，端子30是对导电性的金属板材进行加工而设的。端子30具备：主体部31；从主体部31向右延伸设置的连接部32；从主体部31的下部向后方延伸设置的弯板部33；以及从主体部31向上方延伸的电线连接部34。如图3所示，主体部31被配置在端子30的左侧，在主视时呈矩形。主体部31以板厚方向成为前后方向的方式被容纳于端子容纳部54。
[连接部]
如图15所示，连接部32呈在左右方向上较长的矩形状，与主体部31形成为同一平面。连接部32在上下方向上比主体部31更向上方及下方突出。如图4所示，连接部32形成为与接合部13或构成接合部13的连接电极引线12A的一部分面接触而连接的方式。即，端子30不是用于连接相邻的连接电极引线12A之间的部件，而是用于将预先连接的连接电极引线12A (接合部13)与电线45之间连接的部件。因此，连接部32的上下方向的尺寸也可以比连接电极引线12A的上下方向的尺寸小。
[弯板部，弯曲部]
如图15所示，弯板部33相对于主体部31大致垂直地弯曲，向后方延伸形成。弯板部33以板厚方向成为上下方向的方式配置。主体部31的下端部与弯板部33的前端部经由弯曲部35相连。弯曲部35的板厚方向随着从主体部31朝向弯板部33而从前后方向向上下方向变化。
[开口部，卡止承接部]
在弯板部33上沿上下方向贯通形成有开口部36。开口部36配置于弯板部33的左右方向中央部。开口部36的口缘部中、后侧的口缘部设为卡止承接部36A。如图7所示，卡止承接部36A能够与后述的挠曲片62的卡止部65A卡止。如图15所示，开口部36具有扩展至主体部31侧的扩张开口部36B。通过形成扩张开口部36B，在端子30相对于保护器50沿前后方向移动时，主体部31的下端部不会与挠曲片62发生干涉(参照图6)。
[电线连接部]
如图6以及图15所示，电线连接部34具备：与主体部31为同一平面的基部34A；以及从基部34A的左右方向的两端延伸出的压接片34B。压接片34B具备：第一压接片34C；和在上下方向上与第一压接片34C隔开间隔配置的第二压接片34D。第一压接片34C配置于电线连接部34的主体部31侧，与电线45的芯线46压接。第二压接片34D配置于电线连接部34的上端部，与电线45的绝缘包覆件47压接。另外，除了图5至图7以及图15之外，电线连接部34被简化图示。
如图6所示，压接片34B在基部34A的后方压接电线45。配置于主体部31的后方的电线连接部34被配置于后述的电线连接部容纳部57内。通过这样的构成，能够减小布线单元20的前后方向的尺寸。
[保护器]
如图1所示，保护器50由绝缘性的合成树脂构成，呈板状。保护器50 具备相对于壳体15(及电池堆叠体11L)定位的保护器主体51。如图2所示，在保护器主体51的上下方向的中央部沿左右方向并列设有电极容纳凹部52。电极容纳凹部52沿前后方向贯通形成，呈上下较长的矩形状。电极容纳凹部52由连接电极容纳凹部52A和输出电极容纳凹部52B构成，所述连接电极容纳凹部52A接收接合部13和连接电极引线12A，所述输出电极容纳凹部52B接收输出电极引线12B和输出部14。
如图2所示，在输出电极容纳凹部52B的上侧和下侧设有保持汇流排40的汇流排保持部53。在上侧的汇流排保持部53的右侧设置有用于将汇流排40螺栓紧固的螺栓紧固部53A。在连接电极容纳凹部52A的左斜下侧设有容纳端子30的一部分的端子容纳部54。
[抵接部]
如图12所示，端子容纳部54从保护器主体51向后方凹陷形成。端子容纳部54具备主体部容纳部55、凹部56和电线连接部容纳部57。主体部容纳部55被配置在端子容纳部54的下侧部分。主体部容纳部55具有：底壁部55A；从底壁部55A的左端部向前方延伸的左壁部55B；以及向右方开口的连通孔55C。连通孔55C与连接电极容纳凹部52A连通。如图11所示，主体部容纳部55容纳端子30的主体部31。如图6所示，底壁部55A的前表面为从后方与端子30抵接的抵接部58。如图11所示，在连通孔55C配置有主体部31的连接部32侧的部分，在连接电极容纳凹部52A的内侧配置有连接部32。
[凹部]
如图8及图12所示，在主体部容纳部55的下方形成有凹部56。凹部56比主体部容纳部55更向后方凹陷。凹部56在前后方向上贯通保护器50而形成。如图10所示，构成凹部56的内壁59具备：沿上下方向相互对置的第一内壁59A和第二内壁59B；以及沿左右方向相互对置的2个侧壁59C。第一内壁59A配置于第二内壁59B的上方(主体部容纳部55侧)。第一内壁59A与第二内壁59B之间的尺寸被设定为与弯板部33的板厚(上下方向 的尺寸)相同，或者比其稍大。2个侧壁59C之间的尺寸被设定为与弯板部33的左右方向的尺寸相同，或者比其稍大。在凹部56的内部收纳有弯板部33，使弯板部33与凹部56的内壁59能够滑动接触。通过弯板部33与凹部56的内壁59滑动接触，如图5至图7及图9所示，端子30能够相对于保护器主体51沿前后方向移动。
如图5所示，在底壁部55A的下端部的前侧形成有引导部60。引导部60随着朝向后方而向下侧倾斜。在将弯板部33插通于凹部56内时，引导部60进行引导以使得弯板部33的后端部被引向凹部56内。
如图12所示，电线连接部容纳部57与主体部容纳部55的上方相连地配置。如图6所示，电线连接部容纳部57形成为向底壁部55A的后方凹陷。具体而言，在配置于端子容纳部54内的端子30的主体部31与底壁部55A的前表面(抵接部58)抵接的状态下，将电线连接部容纳部57的前表面设定于电线连接部34不会碰到的位置。电线连接部容纳部57的上部与排线有电线45的布线凹部50A相连。
[挠曲片]
如图12所示，在凹部56的下方，挠曲片容纳凹部61从保护器主体51向后方凹陷形成。在凹部56与挠曲片容纳凹部61之间的第二内壁59B形成有从第二内壁59B的前端向后方凹陷的进入口61A。凹部56与挠曲片容纳凹部61通过进入口61A连通。如图8所示，挠曲片62从挠曲片容纳凹部61的下侧的内壁向上方延伸。如图12所示，通过在进入口61A的内部配置挠曲片62的一部分，从而挠曲片62的前端部进入凹部56内。
如图8所示，挠曲片62具备：在前后方向上较长且在上下方向上扁平的多个板部63；和连结相邻的2个板部63的连结部64。在本实施方式中，多个板部63由配置于挠曲片62的前端侧(上侧)的前端侧板部63A和配置于挠曲片62的基端侧(下侧)的基端侧板部63B构成。前端侧板部63A和基端侧板部63B被配置为在上下方向上隔开间隔而重叠。前端侧板部63A的前端部和基端侧板部63B的前端部通过呈拱状的连结部64以无阶差的状 态平滑地连结。基端侧板部63B的后端部与挠曲片容纳凹部61的下侧的内壁连接。挠曲片62能够在上下方向上挠曲变形。
[卡止部]
前端侧板部63A具备从前端侧板部63A的上表面向上方突出的卡止突起65。卡止突起65被配置在前端侧板部63A的后端部。卡止突起65的后端面被设为卡止部65A。在卡止突起65的前侧部分配置有倾斜部65B。倾斜部65B随着朝向后方而向上侧倾斜。卡止部65A和倾斜部65B被配置为在前后方向上相连。卡止突起65被配置于凹部56内的前侧的空间。
在将弯板部33插入凹部56时，若使弯板部33的后端部与卡止突起65的倾斜部65B抵接的同时向后方移动，则挠曲片62逐渐向下方挠曲。在卡止突起65的后端面(卡止部65A)被配置于弯板部33的开口部36内时，挠曲片62从弹性变形状态恢复到自然状态，卡止部65A和卡止承接部36A成为沿前后方向对置且能够卡止的状态(参照图7)。这样，通过设置倾斜部65B，能够顺畅地进行弯板部33向凹部56的插入以及弯板部33与卡止部65A的卡止。
[端子相对于保护器在前后方向的移动]
容纳端子30的保护器50的构成以及端子30的构成如上文所述，下面对端子30相对于保护器50在前后方向的移动进行说明。如前文所述，由于接合部13(以及连接电极引线12A)在前后方向的公差容易变大，因此端子30的连接部32也能够匹配接合部13在前后方向上的位置而在前后方向上移动。由此，能够确保端子30与连接电极引线12A接触的状态，因此能够使利用激光焊接的端子30与连接电极引线12A的电连接的可靠性得到提高。
在本实施方式中，端子30的弯板部33被配置在端子容纳部54的凹部56内，由此端子30能够相对于保护器50沿前后方向移动。端子30能够相对于保护器主体51在第一位置(参照图6)与第二位置(参照图7)之间沿前后方向移动。在此，第一位置是端子30能够移动的最后方的位置，且 第二位置是端子30能够移动的最前方的位置。如图6所示，在端子30被配置于第一位置的状态下，主体部31的后表面与抵接部58抵接。由此，限制端子30向后方移动。如图7所示，在端子30被配置于第二位置的状态下，端子30的卡止承接部36A与挠曲片62的卡止部65A卡止。由此，限制端子30向前方移动。
第一位置与第二位置之间在前后方向上的长度被设定为与将连接电极引线12A的前后方向上的公差乘以二倍后的长度相同或比其大。另外，第一位置与第二位置之间的中间位置为连接电极引线12A的前后方向上的平均位置。通过这样设定第一位置和第二位置，在将布线单元20的保护器主体51相对于电池堆叠体11L固定后，端子30能够追随连接电极引线12A。详细而言，在对端子30与连接电极引线12A进行激光焊接时，通过夹具等对应于连接电极引线12A按压端子30的连接部32。此时，端子30与连接电极引线12A相匹配地沿前后方向移动。由此，能够确保连接部32与连接电极引线12A为紧密接触的状态，使连接部32与连接电极引线12A的激光焊接良好地进行。
[实施方式1的作用效果]
根据实施方式1，产生了以下的作用、效果。实施方式1所涉及的布线单元20被安装于电池堆叠体11L，该电池堆叠体11L是将多个具备电极引线12的层压型电池11层叠而构成，具备将层压型电池11的电极引线12彼此重叠并接合而成的接合部13，所述布线单元20具备：端子30；电线45，与端子30连接；以及保护器50，保持端子30与电线45，端子30具备：主体部31；连接部32，从主体部31延伸设置，与构成接合部13的电极引线12在第一方向(前后方向)上对置连接；以及至少1个弯板部33，该弯板部从主体部31向第一方向上的层压型电池11侧(后侧)延伸，保护器50具有：保护器主体51；以及至少1个凹部56，相对于保护器主体51向第一方向上的层压型电池11侧凹陷，并容纳弯板部33，弯板部33插入凹部56而能够在第一方向上移动，由此，连接部32能够与电极引线12 接触。
根据这样的构成，通过将弯板部33插入凹部56而能够在第一方向上移动，从而连接部32能够相对于保护器50在第一方向上移动，因此在将连接部32与构成接合部13的电极引线12连接时，即使在电极引线12在第一方向上存在制造公差的情况下，也能够使连接部32与电极引线12接触。由此，能够提高连接部32与电极引线12的电连接的可靠性。
在实施方式1中，保护器50具备抵接部58，从第一方向上的层压型电池11侧与端子30抵接。
根据这样的构成，通过抵接部58，能够限制端子30向第一方向上的层压型电池11侧移动。
在实施方式1中，保护器50具备卡止部65A，从第一方向上的层压型电池11侧的相反侧(前侧)与端子30卡止。
根据这样的构成，能够通过卡止部65A限制端子30向第一方向上的层压型电池11侧的相反侧移动。
在实施方式1中，保护器50具备挠曲片62，从保护器主体51延伸出并能够在与第一方向正交的方向(上下方向)上挠曲变形，挠曲片62的前端部具备卡止部65A，被配置于凹部56内，在弯板部33形成有贯通弯板部33的开口部36，开口部36的口缘部具备卡止承接部36A，与卡止部65A卡止。
根据这样的构成，通过设置具备卡止部65A的挠曲片62，从而能够顺畅地进行弯板部33向凹部56的插入以及端子30相对于保护器50的卡止。
在实施方式1中，端子30具备电线连接部34，从主体部31延伸设置并与电线45连接，电线连接部34具备：基部34A；和从基部34A延伸出的压接片34B，电线45配置于比基部34A更靠第一方向上的层压型电池11侧的位置，压接于压接片34B。
根据这样的构成，由于电线45被配置于比基部34A更靠第一方向上的层压型电池11侧，因此容易减小从电线连接部34的主体部31向第一方向 上的层压型电池11侧的相反侧的突出尺寸。由此，能够减小布线单元20在第一方向上的尺寸。
＜实施方式2＞
参照图16以及图17对本公开内容的实施方式2进行说明。对于与实施方式1相同的构成，标注与实施方式1相同的附图标记，有时省略说明。另外，对于与实施方式1相同的作用效果省略说明。实施方式2涉及的端子130具备2个弯板部33。通过使弯板部33的个数比实施方式1多，从而容易使端子130相对于保护器50移动的形态更稳定。
2个弯板部33在与端子130的主体部31相同的方向、即端子130能够移动的前后方向上延伸配置。例如，如图16所示，2个弯板部33也可以配置于主体部31的下侧和左侧。另外，如图17所示，2个弯板部33也可以以相互对置的方式配置在主体部31的下侧和上侧。虽未图示，但保护器50在与2个弯板部33对应的位置具有凹部56。即，在保护器50上相对于1个端子130形成有2个凹部56。
[实施方式2的作用效果]
根据实施方式2，产生了以下的作用、效果。在实施方式2中，端子130具备多个(2个)弯板部33。
根据这样的构成，通过形成多个弯板部33，从而容易控制端子130的形态。
＜实施方式3＞
参照图18对本公开内容的实施方式3进行说明。对于与实施方式1相同的构成，标注与实施方式1相同的附图标记，有时省略说明。另外，对于与实施方式1相同的作用效果省略说明。实施方式3涉及的端子230在端子230的左端部具备折返状的折返部237。折返部237以与主体部31的左端部、弯曲部35的左端部以及弯板部33的左端部重叠的方式折返。
[实施方式3的作用效果]
根据实施方式3，产生了以下的作用、效果。在实施方式3中，端子 230具备：弯曲部35，连接主体部31的端缘与弯板部33的端缘；以及折返部237，与主体部31、弯曲部35以及弯板部33连接并且与主体部31、弯曲部35以及弯板部33重叠。
根据这样的构成，通过折返部237，能够提高弯曲部35的强度。
＜实施方式4＞
参照图19对本公开内容的实施方式4进行说明。对于与实施方式1相同的结构，标注与实施方式1相同的附图标记，有时省略说明。另外，对于与实施方式1相同的作用效果省略说明。实施方式4涉及的端子330在端子330的左端部具备突出部337。突出部337至少具备从弯曲部35的外侧的曲面向弯曲部35的板厚方向突出的部分。实施方式4的突出部337还具备从主体部31的前表面向前方突出的部分和从弯板部33的下表面向下方突出的部分。实施方式4的突出部337通过敲打加工形成。
[实施方式4的作用效果]
根据实施方式4，产生了以下的作用、效果。在实施方式4中，端子330具备连接主体部31的端缘与弯板部33的端缘的弯曲部35，弯曲部35的板厚方向随着从主体部31朝向弯板部33而从第一方向(前后方向)连续地变化为与第一方向正交的方向(上下方向)，弯曲部35具备从弯曲部35向弯曲部35的板厚方向突出的突出部337。
根据这样的构成，通过突出部337，能够提高弯曲部35的强度。
＜实施方式5＞
参照图20至图22对本公开内容的实施方式5进行说明。对于与实施方式1相同的构成标注与实施方式1相同的附图标记，有时省略说明。另外，对于与实施方式1相同的作用效果省略说明。如图20所示，实施方式5涉及的端子430具备：与实施方式4的突出部337同样地从弯曲部35突出的突出部437；和与突出部437连续地形成于弯板部33的突条部438。
实施方式5的突出部437与实施方式4的突出部337相比，左右方向的尺寸较小。另外，实施方式5的端子430具备沿左右方向排列的2个突 出部437。2个突出部437形成于弯曲部35的左端部和右端部。突出部437至少具备从弯曲部35的外侧的曲面向弯曲部35的板厚方向突出的部分。实施方式5的突出部437还具备从主体部31的前表面向前方突出的部分。
在实施方式5中，在弯板部33的左端部和右端部形成有2个突条部438。突条部438在前后方向上细长地形成，从弯板部33的下表面向下方突出。突条部438的前端部与突出部437的下端部连续。实施方式5的突出部437和突条部438通过补强加工形成。突出部437和突条部438与实施方式4的突出部337同样有助于提高弯曲部35的强度。
如图21及图22所示，在实施方式5的蓄电模组410(布线单元420)中，突条部438容纳于保护器50的凹部56内。突条部438被配置为与保护器50的第二内壁59B对置且能够滑动接触。在实施方式1中，弯板部33的下表面整体与第二内壁59B面接触而滑动接触，与此相对，在实施方式5中，弯板部33中的突条部438的下部与第二内壁59B面接触，以类似于所谓的线接触的方式滑动接触。由此，与实施方式1相比，在实施方式5中，端子430与凹部56的内壁59的滑动接触所涉及的摩擦阻力变小，端子430相对于保护器主体51变得容易在前后方向上移动。
[实施方式5的作用效果]
根据实施方式5，产生了以下的作用、效果。在实施方式5中，弯板部33具备突条部438，在与第一方向正交的方向(下方)上从弯板部33朝向凹部56的内壁59(第二内壁59B)突出并且沿第一方向延伸，突条部438与突出部437连续地形成。
根据这样的构成，通过形成突条部438，能够减小弯板部33与凹部56的内壁59相互接触的部分，因此即使弯板部33与凹部56的内壁59接触，弯板部33也容易滑动。另外，由此突条部438与突出部437连续地形成，因此容易形成突条部438和突出部437。
＜实施方式6＞
参照图23至图26对实施方式6进行说明。对于与实施方式1相同的 构成标注与实施方式1相同的附图标记，有时省略说明。另外，对于与实施方式1相同的作用效果省略说明。如图24及图26所示，在端子30上延伸有电线连接部34，保护器主体50上设置有电线连接部容纳部57，电线连接部34设置在电线连接部容纳部57中。
[实施方式6的作用效果]
根据这样的构成，通过电线连接部34和电线连接部容纳部57的配合设置，使得端子30在与电极引线12焊接的过程中，能够避免端子30旋转，提高端子30的稳定性，避免焊接不良。
＜实施方式7＞
参照图27对实施方式7进行说明。对于与实施方式1相同的构成标注与实施方式1相同的附图标记，有时省略说明。另外，对于与实施方式1相同的作用效果省略说明。连接部32上设置有弧形连接部32A，弧形连接部32A被配置为吸收电极引线12的位移量。进一步地，弧形连接部32A上开设有若干个条形孔，进而使得弧形连接部32A形成梳齿形状，从而有利于当电极引线12发生位移时弧形连接部32A发生变形吸收电极引线12的位移量。
[实施方式7的作用效果]
根据这样的构成，通过电极引线12与层压型电池11的端部连接，在层压型电池11发生膨胀变形时，电极引线12也会跟随电芯发生一定程度的位移，然而本实施例中通过在端子30的连接部32上设置弧形连接部32A，这样使得弧形连接部32A能够吸收电极引线12位移量，进而避免在电极引线12发生位移时，端子30被拉扯而出现端子30结构不稳定、脱落甚至断裂的风险。
＜其他实施方式＞
(1)在上述实施方式中，接合部13由4个电极引线12接合构成，但并不限定于此。接合部只要由多个电极引线接合构成即可。(2)在实施方式1中，端子30构成为具有开口部36，开口部36的口缘部具备卡止承接 部36A，但并不限定于此。例如，端子也可以构成为不具有开口部，而具备从弯板部突出的方式的卡止承接部。(3)在上述实施方式中，保护器50具备挠曲片62，该挠曲片62具备卡止部65A，但并不限定于此。保护器也可以通过与挠曲片不同的部件从前侧对端子进行卡止。(4)实施方式1的电线连接部34从主体部31向上方延伸，但也可以如图23、图24那样从主体部31向下方延伸。(5)在实施方式1中，弯板部33位于主体部31的下端，但也可以如图23、图24那样位于主体部31的上方。(6)作为实施方式5的另外一种替代方案，如图25、26所示，在本实施例中，凹部56的侧壁上凸设有凸起部56A，凸起部56A抵接于平片状的弯板部33，减小凹部56和弯板部33的接触面积，便于弯板部33在凹部56中的活动。(7)作为实施方式1中的卡止部65A的另外一种替代方案，如图25、26所示，在本实施方式中，保护器主体50上设置有限位柱66，端子30上开设有通孔37，限位柱66穿设在通孔37中。具体地，限位柱66包括柱体66A以及与柱体66A连接的柱头66B，沿柱体66A的高度方向，柱头66B的投影面积大于通孔37的投影面积，通孔37的投影面积大于柱体66A的投影面积，这样不仅能够使得端子30上的通孔37穿过柱体66A，而且端子30能够沿着柱体66A高度的方向进行活动，柱头66B和保护器主体共同对端子30的前后移动进行限位。
附图标记说明
10，410：蓄电模组
11：层压型电池
11L：电池堆叠体
12：电极引线
12A：连接电极引线
12B：输出电极引线
13：接合部
14：输出部
15：壳体
15A：底部
15B：顶部
15C：侧部
20，420：布线单元
30，130，230，330，430：端子
31：主体部
32：连接部
32A：弧形连接部
33：弯板部
34：电线连接部
34A：基部
34B：压接片
34C：第一压接片
34D：第二压接片
35：弯曲部
36：开口部
37：通孔
36A：卡止承接部
36B：扩张开口部
40：汇流排
40A：第一部分
40B：第二部分
41：汇流排侧连接部
41A：贯通孔
45：电线
46：芯线
47：绝缘包覆件
48：连接器
48A：壳体
48B：公端子
50：保护器
50A：布线凹部
51：保护器主体
52：电极容纳凹部
52A：连接电极容纳凹部
52B：输出电极容纳凹部
53：汇流排保持部
53A：螺栓紧固部
54：端子容纳部
55：主体部容纳部
55A：底壁部
55B：左壁部
55C：连通孔
56：凹部
56A：凸起部
57：电线连接部容纳部
58：抵接部
59：内壁
59A：第一内壁
59B：第二内壁
59C：侧壁
60：引导部
61：挠曲片容纳凹部
61A：进入口
62：挠曲片
63：板部
63A：前端侧板部
63B：基端侧板部
64：连结部
65：卡止突起
65A：卡止部
65B：倾斜部
66：限位柱
66A：柱体
66B：柱头
237：折返部
337，437：突出部
438：突条部。

Claims (13)

  1. 一种布线单元，被安装于电池堆叠体，该电池堆叠体由多个具备电极引线的层压型电池层叠构成，所述层压型电池具备将所述层压型电池的所述电极引线彼此重叠接合的接合部，该布线单元的特征在于，具备：
    端子；
    电线，与所述端子连接；
    以及保护器，保持所述端子与所述电线，
    所述端子具备：主体部；连接部，从所述主体部延伸设置，与构成所述接合部的所述电极引线在第一方向上对置连接；以及至少1个弯板部，从所述主体部向所述第一方向上的所述层压型电池侧延伸，
    所述保护器具有：保护器主体；以及至少1个凹部，相对于所述保护器主体向所述第一方向上的所述层压型电池侧凹陷，并容纳所述弯板部，所述弯板部插入所述凹部而能够在所述第一方向上移动，从而所述连接部能够与所述电极引线接触。
  2. 根据权利要求1所述的布线单元，其特征在于，
    所述端子具备：弯曲部，将所述主体部的端缘与所述弯板部的端缘连接；以及折返部，与所述主体部、所述弯曲部以及所述弯板部连接，并且与所述主体部、所述弯曲部以及所述弯板部重叠。
  3. 根据权利要求1所述的布线单元，其特征在于，
    所述端子具备弯曲部，连接所述主体部的端缘与所述弯板部的端缘，所述弯曲部的板厚方向随着从所述主体部朝向所述弯板部而从所述第一方向向与所述第一方向正交的方向连续地变化，所述弯曲部具备突出部，从所述弯曲部沿所述弯曲部的板厚方向突出。
  4. 根据权利要求3所述的布线单元，其特征在于，
    所述弯板部具备突条部，在与所述第一方向正交的方向上从所述弯板部朝向所述凹部的内壁突出，并且在所述第一方向上延伸，所述突条部与所述突出部连续地形成。
  5. 根据权利要求1所述的布线单元，其特征在于，
    所述凹部的侧壁上凸设有凸起部，所述凸起部能够抵接于所述弯板部。
  6. 根据权利要求1至4中任一项所述的布线单元，其特征在于，
    所述端子具备多个所述弯板部。
  7. 根据权利要求1至4中任一项所述的布线单元，其特征在于，
    所述保护器具备抵接部，从所述第一方向上的所述层压型电池侧与所述端子抵接。
  8. 根据权利要求1至4中任一项所述的布线单元，其特征在于，
    所述保护器具备卡止部，从所述第一方向上的所述层压型电池侧的相反侧与所述端子卡止。
  9. 根据权利要求8所述的布线单元，其特征在于，
    所述保护器具备挠曲片，从所述保护器主体延伸出，能够向与所述第一方向正交的方向挠曲变形，所述挠曲片的前端部具备所述卡止部，被配置于所述凹部内，在所述弯板部形成有贯通所述弯板部的开口部，所述开口部的口缘部具备与所述卡止部卡止的卡止承接部。
  10. 根据权利要求1所述的布线单元，其特征在于，
    所述保护器主体上设置有限位柱，所述端子上开设有通孔，所述限位柱穿设在所述通孔中；
    所述限位柱包括柱体以及与所述柱体连接的柱头，沿所述柱体的高度方向，所述柱头的投影面积大于所述通孔的投影面积，所述通孔的投影面积大于所述柱体的投影面积。
  11. 根据权利要求1至4中任一项所述的布线单元，其特征在于，
    所述端子具备电线连接部，从所述主体部延伸设置，连接所述电线，所述电线连接部具备基部和从所述基部延伸出的压接片，所述电线被配置于比所述基部更靠所述第一方向上的所述层压型电池侧，被所述压接片压接。
  12. 根据权利要求1所述的布线单元，其特征在于，
    所述端子上延伸有电线连接部，所述保护器主体上设置有电线连接部容纳部，所述电线连接部设置在所述电线连接部容纳部中。
  13. 根据权利要求1所述的布线单元，其特征在于，
    所述连接部上设置有弧形连接部，所述弧形连接部上开设有若干个条形孔，所述弧形连接部被配置为吸收所述电极引线的位移量。
PCT/CN2023/097353 2022-06-02 2023-05-31 布线单元 WO2023232060A1 (zh)

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JP2012243649A (ja) * 2011-05-20 2012-12-10 Auto Network Gijutsu Kenkyusho:Kk 電池配線モジュール
CN103250270A (zh) * 2010-12-07 2013-08-14 株式会社自动网络技术研究所 带端子的板、板组装体及电池组件
CN107004822A (zh) * 2014-12-17 2017-08-01 株式会社自动网络技术研究所 电池配线模块
CN110192293A (zh) * 2016-11-07 2019-08-30 远景Aesc日本有限公司 间隔件、组电池以及组电池的制造方法
CN110892552A (zh) * 2017-12-19 2020-03-17 株式会社Lg化学 具有汇流条组件的电池模块
CN114041238A (zh) * 2019-07-05 2022-02-11 株式会社自动网络技术研究所 连接模块

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103250270A (zh) * 2010-12-07 2013-08-14 株式会社自动网络技术研究所 带端子的板、板组装体及电池组件
JP2012243649A (ja) * 2011-05-20 2012-12-10 Auto Network Gijutsu Kenkyusho:Kk 電池配線モジュール
CN107004822A (zh) * 2014-12-17 2017-08-01 株式会社自动网络技术研究所 电池配线模块
CN110192293A (zh) * 2016-11-07 2019-08-30 远景Aesc日本有限公司 间隔件、组电池以及组电池的制造方法
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