CN110739562A - Bus bar and electric wire connecting structure and bus bar module - Google Patents
Bus bar and electric wire connecting structure and bus bar module Download PDFInfo
- Publication number
- CN110739562A CN110739562A CN201910644524.7A CN201910644524A CN110739562A CN 110739562 A CN110739562 A CN 110739562A CN 201910644524 A CN201910644524 A CN 201910644524A CN 110739562 A CN110739562 A CN 110739562A
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- Prior art keywords
- bus bar
- arm portion
- electric wire
- wire
- jig
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/505—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising a single busbar
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/02—Soldered or welded connections
- H01R4/027—Soldered or welded connections comprising means for positioning or holding the parts to be soldered or welded
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
- H01R12/50—Fixed connections
- H01R12/59—Fixed connections for flexible printed circuits, flat or ribbon cables or like structures
- H01R12/63—Fixed connections for flexible printed circuits, flat or ribbon cables or like structures connecting to another shape cable
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R25/00—Coupling parts adapted for simultaneous co-operation with two or more identical counterparts, e.g. for distributing energy to two or more circuits
- H01R25/16—Rails or bus-bars provided with a plurality of discrete connecting locations for counterparts
- H01R25/161—Details
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/28—Clamped connections, spring connections
- H01R4/48—Clamped connections, spring connections utilising a spring, clip, or other resilient member
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/28—Clamped connections, spring connections
- H01R4/50—Clamped connections, spring connections utilising a cam, wedge, cone or ball also combined with a screw
- H01R4/5066—Clamped connections, spring connections utilising a cam, wedge, cone or ball also combined with a screw mounted in an insulating housing having a cover providing clamping force
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/02—Soldered or welded connections
- H01R4/023—Soldered or welded connections between cables or wires and terminals
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- 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
Abstract
Provided are a connection structure capable of improving reliability of electrical connection at a connection position therebetween, and a bus bar module using the connection structure. The connection structure 5 includes the electric wire 1, the bus bar 11, and the connection jig 70. The bus bar 11 is electrically connected to the conductor core wire 2 of the electric wire 1. The bus bar 11 includes a bus bar main body 12 and an arm portion 13 extending from the bus bar main body 12. The attaching jig 70 is configured to set the electric wire 1 at a predetermined position in the extending direction and the width direction of the arm portion 13 by engaging with the arm portion 13 while holding the electric wire 1. When the electric wire 1 is disposed at a predetermined position, the conductor core wire 2 is electrically connected to the bus bar 11.
Description
Cross Reference to Related Applications
This application is based on and claims the benefit of priority from Japanese patent application No.2018-135075 filed on 7/18 of 2018, the entire contents of which are incorporated herein by reference.
Technical Field
The present invention relates to a connection structure for connecting a bus bar to an electric wire using a connection jig, and a bus bar module using the connection structure.
Background
For example, in of such ｃA connection structure, when the conductor core wire is ultrasonically bonded to the arm portion, the wire is bent from the extension portion of the side surface of the arm portion toward the wire, and the wire is held pressed against the arm portion by the extension portion (see, for example, JP-A-2016-048635).
In the above-described connection structure, when the operator bends the extension portion to press the electric wire against the arm portion, the position of the electric wire with respect to the arm portion may not always be as designed (i.e., positional deviation may occur). Even if the electric wire is held at the designed position, the holding force may not always be kept sufficient due to elastic recovery of the shape of the extended portion, which may cause positional deviation of the electric wire during ultrasonic bonding. When a positional deviation of the electric wire with respect to the arm portion occurs for this reason, the conductor core wire and the arm portion may not be sufficiently electrically connected, resulting in a decrease in reliability of the electrical connection therebetween.
Disclosure of Invention
The present invention has been made in view of the above circumstances, and an object thereof is to provide types of bus bar-to-wire connection structures that can improve the reliability of electrical connection at the connection position between a bus bar and a wire, and a bus bar module using the connection structure.
In order to achieve the above object, the connecting structure and the bus bar module according to the present invention have the following features (1) to (5).
(1) The th aspect of the invention provides connection structures comprising:
a bus bar;
an electric wire having a conductor core wire; and
the clamp is connected with the base plate and the clamping plate,
wherein, the busbar includes:
a bus bar main body; and
an arm portion extending from the bus bar main body;
wherein the connection jig is configured to set the electric wire at a predetermined position in an extending direction and a width direction of the arm portion by engaging with the arm portion while holding the electric wire; and is
Wherein the conductor core wire is electrically connected to the bus bar in a state where the electric wire is disposed at a predetermined position.
(2) In the connection structure according to (1), the connection jig includes:
a holding portion configured to hold an electric wire;
a holding portion configured to restrict the connecting jig from being displaced in the width direction with respect to the arm portion by holding the arm portion in the width direction; and
an abutting portion configured to restrict displacement of the attaching jig in the extending direction relative to the arm portion by abutting against the abutted portion of the arm portion in the extending direction.
(3) In the connection structure according to (2), the arm portion includes a wide portion serving as an abutted portion and a curved portion;
wherein the bent portion is positioned closer to the extending end of the attaching jig than the engaging position of the attaching jig, and is bent in a thickness direction of the arm portion; and is
Wherein the wide portion is positioned closer to the base end of the arm portion than the engaging position, and a width of the wide portion is larger than a gripping width of the gripping portion in the engaging position.
(4) In the connection structure according to any of (1) to (3), the conductor core wire is ultrasonically bonded to the bus bar, and
wherein the bus bar is configured such that an angle between a side surface of the arm portion in the width direction and a side surface of the bus bar main body is larger than a right angle by gradually increasing a width of the arm portion toward the base end in the vicinity of the base end of the arm portion.
(5) A second aspect of the present invention provides bus bar modules, comprising:
a wire wiring body attached to a battery assembly including a plurality of unit batteries; and
and a bus bar that is accommodated and held in a bus bar accommodating portion provided in the electric wire wiring body, wherein the conductor core of the electric wire wired in the electric wire wiring body is electrically connected to the bus bar.
The bus bar and the conductor core of the electric wire are connected by the connection structure according to any of (1) to (4).
According to the connection structure having the structure in (1), the electric wire is fixed to the bus bar by the connection jig engageable with the arm portion of the bus bar, and the conductor core wire of the electric wire is connected to the bus bar after the electric wire is fixed to the bus bar by the connection jig engageable with the arm portion of the bus bar. Therefore, compared with the connection structure in the related art, the electric wire can be reliably provided to the arm portion at the design position; the holding force can be reliably maintained even after the electric wire is fixed. Therefore, the positional deviation of the electric wire can be prevented as compared with the connection structure in the related art. Therefore, the connection structure having the above configuration can improve the reliability of the electrical connection at the connection position between the bus bar and the electric wire.
According to the connection structure having the structure in (2), while the electric wire is held by the holding portion of the connection jig, the positional displacement of the connection jig with respect to the arm portion can be prevented by the clamping portion and the abutting portion. In addition, the holding portion, the clamping portion, and the abutting portion may be separate members independent of each other and constitute a connecting jig; two of the holding portion, the clamping portion, and the abutting portion may be an integral member, and the connecting jig is constituted by assembling the remaining members; and all of the holding portion, the clamping portion and the abutment portion may be a unitary member.
According to the connection structure having the structure in (3), the connection jig is prevented from being displaced toward the extended end by the curved portion of the arm portion, and the connection jig is prevented from being displaced toward the base end by the wide portion of the arm portion. Therefore, the positional deviation of the attaching jig with respect to the arm portion (in other words, the position of the electric wire with respect to the arm portion) can be prevented.
According to the connection structure having the structure in (4), in the vicinity of the base end portion of the arm portion, an angle between a side surface of the arm portion in the width direction and a side surface of the bus bar main body may be larger than an angle in a case where the width of the arm portion is uniform. Therefore, stress concentration is less likely to occur in the base end portion of the arm portion during ultrasonic wave joining, as compared with the case where the width of the arm portion is uniform. As a result, damage to the bus bar due to stress concentration can be prevented.
According to the bus bar module having the configuration in (5), compared with the case of using the connection structure in the related art, it is possible to obtain a bus bar module that prevents positional deviation of the electric wire with respect to the bus bar and improves reliability of electrical connection at the connection position between the bus bar and the electric wire.
According to the present invention, it is possible to provide a connection structure of a bus bar and an electric wire, which can improve reliability of electrical connection at a connection position therebetween, and a bus bar module using such a connection structure.
Mode for the invention the details of the present invention will be further clarified by reading a mode for carrying out the present invention described below (hereinafter, referred to as "embodiment") with reference to the drawings.
Drawings
Fig. 1 is a perspective view showing a connection structure of a bus bar and an electric wire according to an embodiment;
fig. 2A is a side view of a main part of the connection structure of fig. 1; fig. 2B is a plan view of the main part; fig. 2C is a plan view of an arm portion of the bus bar;
fig. 3 is an exploded perspective view of a main part of the connection structure of fig. 1;
fig. 4A is an enlarged side view of a portion a of fig. 3 when viewed from the width direction; fig. 4B is an enlarged side view of a portion B of fig. 3 when viewed from the width direction;
fig. 5 is a plan view of a power supply device to which a bus bar module to which the connection structure of fig. 1 is applied;
fig. 6 is a plan view around the connection structure of fig. 1 applied to the bus bar module of fig. 5;
fig. 7A is an exploded perspective view of a main part of a connecting structure according to a modification of the embodiment; fig. 7B is a perspective view of the main portion.
Detailed Description
< example >
Hereinafter, a connection structure of a bus bar and an electric wire according to an embodiment of the present invention, and a bus bar module using the same will be described with reference to the accompanying drawings.
As shown in fig. 1 to 4, the connection structure 5 according to the embodiment of the present invention includes an electric wire 1, a bus bar 11, and a connection jig 70. The bus bar 11 is electrically connected to the conductor core wire 2 of the electric wire 1.
Hereinafter, for convenience of description, the x-axis direction, the y-axis direction, and the z-axis direction are defined as shown in fig. 1 to 4. The x-axis direction, the y-axis direction, and the z-axis direction are orthogonal to each other, and are also referred to as an extension direction, a width direction, and an up-down direction. First, the structures of the electric wire 1, the bus bar 11, and the connection jig 70 will be described below.
The electric wire 1 includes a conductor core wire 2 made of metal (typically made of copper) and a resin insulation coating 3 covering the outer periphery of the conductor core wire 2. in the present embodiment, the conductor core wire 2 includes bundles of a plurality of wires, but may also include wires.at a predetermined length from the end of the electric wire 1, the insulation coating 3 is removed to expose the conductor core wire 2. an exposed end portion 2a of the conductor core wire 2, which will be described below, is ultrasonically bonded to the bus bar 11.
As described below, from the viewpoint of improving the reliability of electrical connection when attaching the bus bar 11 to a target (e.g., the unit cell 42 in fig. 5), the bus bar 11 is pressed here to be stamped from the lower surface toward the upper surface (in the z-axis positive direction). as a result, as shown in fig. 4A and 4B (enlarged side views of portions a and B in fig. 3), the upper surface end portions a1 and B1 on the end surface (stamping surface) of the bus bar 11 are deformed to extend in the stamping direction.
The bus bar main body 12 has a rectangular flat plate shape the arm portion 13 is a rectangular flat plate portion which extends outward (x-axis negative direction) in the width direction from a middle portion (side surface in the x-axis negative direction) of the side surface of the bus bar main body 12, the shape of the bus bar main body 12 is not limited to the rectangular flat plate shape, and may be an elliptical flat plate shape or the like.
Specifically, as shown in fig. 2A, 2C, 3 and 4, the arm portion 13 includes a tapered portion 13a extending in a flat plate shape from a side surface of the bus bar main body 12, a parallel portion 13b continuing in a flat plate shape from an extending end of the tapered portion 13a, and a bent portion 13C at an extending end of the parallel portion 13 b.
The width of the tapered portion 13a gradually increases from the extending end thereof toward the base end along the extending direction. The width of the parallel portion 13b is constant throughout the extending direction as the width of the tapered portion 13a at the extending end. The bent portion 13c is a portion in which the extended end of the parallel portion 13b is bent downward (negative z-axis direction). By bending the bent portion 13c in this way, as shown in fig. 2, the electric wire 1 and a sharp burr (an upper surface end a1 on the end surface of the bent portion 13c shown in fig. 4A) generated during pressing can be isolated so that the burr (an upper surface end a1) does not contact the electric wire 1.
Further, since the base end portion of the arm portion 13 is constituted by the tapered portion 13a, an angle θ (refer to fig. 2C) between a side surface of the base end portion of the arm portion 13 in the width direction and a side surface of the bus bar main body 12 may be larger than 90 °. In other words, the angle θ is larger than an angle (═ 90 °) between a side surface of the base end portion of the arm portion in the width direction and a side surface of the bus bar main body 12 in a pattern in which the width of the arm portion is constant in the entire extending direction.
The resin attaching jig 70 is used to fix the electric wire 1 to a predetermined position of the arm portion 13. Specifically, the connection jig 70 includes the wire holder 20 and the bus bar holder 30, as shown in fig. 3.
The wire holder 20 includes a rectangular parallelepiped holder body 21, the holder body 21 includes, in an intermediate portion of a center of a lower surface in a width direction, a wire holding portion 22 recessed in a semi-cylindrical shape over an entire area in an extending direction, the holder body 21 includes, on both side surfaces in the width direction, pairs of protruding portions 23 extending in the extending direction, an inner diameter of the wire holding portion 22 is slightly smaller than an outer diameter of the insulating coating 3 of the wire 1, and therefore, by accommodating the wire 1 (the insulating coating 3 of the wire 1) in the wire holding portion 22, the wire 1 can be held by the wire holder 20.
The bus bar holder 30 includes rectangular bottom plate portions 31 and and upright wall portions 32, the upright wall portions 32 extending upward from both ends in the width direction of the bottom plate portion 31 and facing each other in the width direction, each upright wall portion 32 includes pairs of post portions 33 extending upward from the ends in the width direction of the bottom plate portion 31, and a coupling portion 34 integrally coupling the upper ends of pairs of post portions 33 and extending in the extending direction.
The interval in the width direction between pairs of the upright wall portions 32 (more specifically, the column portions 33) (the interval between the end surfaces facing each other in the width direction, hereinafter referred to as "clamping width") is slightly larger than the width of the parallel portion 13b of the arm portion 13 of the bus bar 11 the length of the bottom plate 31 in the extending direction is slightly smaller than the length of the parallel portion 13b in the extending direction, therefore, the bus bar holder 30 can be placed on the upper surface of the bottom plate portion 31 so as to clamp the parallel portion 13b of the arm portion 13 of the bus bar 11 between pairs of upright wall portions 32.
The width of the tapered portion 13a of the arm portion 13 is larger than the grip width in a range from a position slightly shifted toward the base end from the extended end of the tapered portion 13a to the base end of the tapered portion 13a, that is, the width of the tapered portion 13a is larger than the width of the parallel portion 13b in a range from a position slightly shifted toward the base end from the extended end of the tapered portion 13a to the base end of the tapered portion 13a, therefore, the bus bar holder 30 is prevented from being displaced to approach the base end of the tapered portion 13a in the extending direction of the bus bar 11 (details will be described below). the holder main body 21 (rectangular parallelepiped portion) of the wire holder 20 has a width in the width direction slightly smaller than the grip width, and a width in the width direction between the protruding ends of to the protruding portion 23 is slightly larger than the grip width.a length in the extending direction of the protruding portion 23 is smaller than an interval in the extending direction of to the column portion 33 (an interval between end faces facing.
The structures of the electric wire 1, the bus bar 11, and the connecting jig 70 have been described above.
Next, a process of obtaining the connecting structure 5 (see fig. 1) by electrically connecting the conductor core wire 2 of the electric wire 1 to the bus bar 11 will be described with reference to fig. 2A to 2C and 3, first, as shown in fig. 3, the electric wire 1 is held in the electric wire holder 20 by accommodating the insulating coating 3 near the conductor core wire 2 exposed at the end of the electric wire 1 in the electric wire holding portion 22 of the electric wire holder 20, the exposed conductor core wire 2 of the electric wire 1 protrudes outward in the extending direction (x-axis positive direction) from the holder main body 21.
Next, the bus bar holder 30 places the parallel portion 13b of the arm portion 13 of the bus bar 11 on the upper surface of the bottom plate portion 31 to sandwich the parallel portion 13b between pairs of the upright wall portions 32 next, the holder main body 21 of the wire holder 20 holding the electric wire 1 is pushed down from above to a space between pairs of the upright wall portions 32 of the bus bar holder 30 in which the arm portion 13 is placed.
At this time, the presses the pair of standing wall portions 32 (more specifically, the pair of coupling portions 34) first against the protruding portion 23. therefore, the pair of standing wall portions 32 are elastically deformed outward in the width direction (in the direction away from each other). by further the holder body 21 is pushed, when the pair of protruding portions 23 enter below the pair of coupling portions 34, elastically restores the shape of the elastically deformed standing wall portions 32 (see fig. 2A).
When the shape of the erected wall portion 32 is elastically restored in this way, is engaged with the protruding portions 23 and with the coupling portion 34, as a result, the parallel portion 13b of the arm portion 13 is sandwiched in the up-down direction by the wire holder 20 and the bus bar holder 30, and therefore, the electric wire 1 is appropriately fixed to a predetermined position (e.g., a design position) on the upper surface of the arm portion 13, so that the exposed conductor core wire 2 of the electric wire 1 extends on the upper surface of the arm portion 13 in the extending direction.
In this state, clamps the arm portion 13 in the width direction against the upright wall portion 32, and therefore, the connection jig 70 (the wire holder 20+ the bus bar holder 30) is restricted from being displaced in the width direction relative to the arm portion 13. furthermore, the end surface of the bottom plate portion 31 of the bus bar holder 30 in the extending direction (the end surface in the x-axis negative direction) abuts against the curved portion 13c of the arm portion 13 in the extending direction, and therefore, the connection jig 70 (the wire holder 20+ the bus bar holder 30) is restricted from being displaced in the extending direction relative to the arm portion 13 to the end thereof (the x-axis negative direction). further, of the bus bar holder 30 abuts against the side surface of the tapered portion 13a of the arm portion 13 in the width direction against the other ends (the ends in the x-axis positive direction) of the post portion 33 in the extending direction, and therefore, the connection jig 70 (the wire holder 20+ the bus bar holder 30) is restricted from being displaced in the extending direction relative to the other end thereof (the x-axis positive direction) relative to.
In the present embodiment, the holder main body 21 and the bottom plate portion 31 correspond to a "holding portion" in the present invention, the pair of the upright wall portions 32 correspond to a "holding portion" in the present invention, the end surface of the bottom plate portion 31 in the extending direction (end surface in the negative x-axis direction) and the other end portion of the pair of the upright wall portions 32 in the extending direction (end portion in the positive x-axis direction) correspond to an "abutting portion" in the present invention, the curved portion 13c of the arm portion 13 corresponds to an "abutted portion" and a "curved portion" in the present invention, the tapered portion 13a of the arm portion 13 corresponds to an "abutted portion" and a "wide portion" in the present invention, and the parallel portion 13b of the arm portion 13 corresponds to an "engaging position" in the present invention.
Next, as described above, the distal end portion 2a of the exposed conductor core wire 2 of the wire 1 is joined to the upper surface of the arm portion 13 by a known method, with the electric wire 1 fixed at a predetermined position on the upper surface of the arm portion 13. Generally, ultrasonic bonding can be employed as the bonding method. However, the present invention is not limited thereto, and other bonding methods such as welding may be used.
The connection structure 5 according to the embodiment shown in fig. 1 can be obtained by the above-described process.
Next, a case where the connection structure 5 according to the embodiment is applied to the bus bar module 41 will be described with reference to fig. 5 and 6.
As shown in fig. 5, the bus bar module 41 is attached to a battery assembly 43 including a plurality of unit batteries 42 to constitute a power supply device 44. The power supply device 44 is mounted on, for example, an electric vehicle that runs using a motor and a hybrid vehicle that runs using a combination of an engine and a motor, so as to supply power to the motor.
The bus bar module 41 includes a wire wiring body 45 made of resin, the bus bar 11 is held in the wire wiring body 45 (specifically, see fig. 6), the bus bar 11 is soldered to electrodes (not shown) protruding from each of a plurality of unit cells 42 constituting the battery assembly 43, the bus bar 11 is connected to, for example, terminals of the electric wire 1, which are connected to a voltage detection device (not shown), the bus bar 11 and the electrodes of the unit cells 42 do not necessarily need to be soldered, for example, when the electrodes of the unit cells 42 are inserted into through-holes provided in the bus bar 11, the bus bar 11 and the electrodes of the unit cells 42 may be fastened by nuts or the like.
As shown in fig. 6, the electric wire wiring body 45 includes the bus bar accommodating part 51 having a frame shape such that the bus bar main body 12 of the bus bar 11 is accommodated and held in the bus bar accommodating part 51, the portion constituting the peripheral wall 53 of the bus bar accommodating part 51 is opened such that the arm part 13 of the bus bar 11 is located in the opening portion.
The electric wire wiring body 45 includes an electric wire wiring groove 55, the electric wire wiring groove 55 being connected to the opening portion of the bus bar accommodating portion 51 such that the electric wire 1 is accommodated in the electric wire wiring groove 55, both sides of the electric wire wiring groove 55 are constituted by pairs of side walls 56A and 56B, the electric wire wiring groove 55 includes an electric wire holding portion 61, and the electric wire holding portion 61 holds the electric wire 1 accommodated therein.
As shown in fig. 6, the electric wire wiring body 45 includes pairs of support walls 52 in the opening portion of the bus bar accommodating portion 51 the support walls 52 are provided on both side portions orthogonal to the extending direction of the arm portion 13 extending from the bus bar main body 12, and sandwich pairs of upright wall portions 32 of the bus bar holder 30, pairs of upright wall portions 32 of the bus bar holder 30 hold the electric wires 1 and the arm portion 13 in the width direction.
Therefore, even when an external force acts on the arm portion 13 in a direction (y-axis direction) orthogonal to the extending direction of the arm portion 13, because the electric wire 1 is pulled or the like during the operation thereof, both side portions of the arm portion 13 are supported by the support walls 52 of the electric wire wiring body 45, so that the arm portion 13 can be prevented from being deformed by the external force, further, even when such an external force acts, the external force does not directly reach the terminal portion 2a (ultrasonic bonding position) of the conductor core wire 2 because the electric wire 1 is held by the connecting jig 70, therefore, the terminal portion 2a can be prevented from being separated from the bus bar 11. as a result, the reliability of the electrical connection between the electric wire 1 and the bus bar 11 can be improved by steps.
As described above, according to the connection structure 5 of the embodiment of the present invention, and the bus bar module 41, after the position of the electric wire 1 is fixed by the connection jig 70 (the electric wire holder 20+ the bus bar holder 30) which can be engaged with the arm portion 13 of the bus bar 11, the conductor core wire 2 of the electric wire 1 is electrically connected to the bus bar 11. Therefore, the positional deviation of the electric wire 1 is less likely to occur as compared with the connection structure in the related art. As a result, the reliability of the electrical connection between the bus bar 11 and the electric wire 1 can be appropriately maintained.
Further, since clamps the standing wall portion 32 in the width direction to the arm portion 13, the connecting jig 70 is restricted from being displaced in the width direction with respect to the arm portion 13, since the end surface of the bottom plate portion 31 of the bus bar holder 30 in the extending direction (the end surface in the x-axis negative direction) abuts against the curved portion 13c of the arm portion 13 in the extending direction, the connecting jig 70 is restricted from being displaced in the extending direction with respect to the arm portion 13 to the end portion thereof (the x-axis negative direction). since of the bus bar holder 30 displaces the other end of the standing wall portion 32 in the extending direction (the end in the x-axis positive direction) in the width direction to the side surface of the tapered portion 13a of the arm portion 13 in the extending direction, the connecting jig 70 is restricted from being displaced in the extending direction with respect to the other end thereof (the x-axis positive direction). as a result, the positional displacement of the connecting jig 70 with respect to the arm portion 13 with respect to the wire 1 when the conductor core wire 2 is connected to the bus bar 11 can be reliably prevented.as the end portion 1 is separated from the wire burr by the pressing surface (57) and thus the sharp upper surface shape of the wire 1 can be prevented from being damaged.
Further, in the vicinity of the base end portion of the arm portion 13, an angle θ (refer to fig. 2C) between a side surface of the arm portion 13 (tapered portion 13a) in the width direction and a side surface of the bus bar main body 12 may be larger than that in the case where the width of the arm portion is uniform. As a result, stress concentration hardly occurs in the base end portion of the arm portion 13 during ultrasonic bonding, and damage to the bus bar due to the stress concentration can be prevented.
< other examples >
The present invention is not limited to the above-described embodiments, and various modifications may be adopted within the scope of the present invention. For example, the present invention is not limited to the above-described embodiments, and may be appropriately modified, improved, or the like. The materials, shapes, sizes, numbers, arrangement positions, and the like of the constituent elements in the above-described embodiments are optional as long as the present invention can be implemented, and the present invention is not limited thereto.
For example, in the above-described embodiment, as shown in fig. 3 and the like, the connecting jig 70 includes two members, i.e., the wire holder 20 and the bus bar holder 30, conversely, as shown in fig. 7A and 7B, the connecting jig 70 may include only members, i.e., the wire holder 20.
In the mode shown in fig. 7A and 7B, the holder main body 21 of the electric wire holder 20 includes pairs of the hanging portions 24, the hanging portions 24 extending downward in the width direction from both side surfaces of the holder main body 21 and facing each other in the width direction, each hanging portion 24 is formed at an extended end portion with a protruding portion 25 (lower end portion) protruding inward in the width direction.
In this mode, when the electric wire 1 is fixed to a predetermined position on the upper surface of the arm portion 13, the holder body 21 of the electric wire holder 20 holding the electric wire 1 is first pushed down from above to the parallel portion 13b of the arm portion 13. at this time, first is pressed against the end surface of the protruding portion 25 in the width direction by the parallel portion 13b of the arm portion 13, so that elastically deforms the hanging portion 24 outward in the width direction (in a direction away from each other). by pushing the holder body 21 further by , elastically restores the shape of the elastically deformed hanging portion 24 when brings the protruding portion 25 under the parallel portion 13 b.
When the hanging portion 24 is restored in this manner, is engaged with the protruding portion 25 and the parallel portion 13b of the arm portion 13. as a result, the electric wire holder 20 is held on the arm portion 13 so that the electric wire 1 is fixed in a predetermined position on the upper surface of the arm portion 13.
In the above embodiment, the bent portion 13c is provided on the extended end portion of the arm portion 13. However, the structure for restricting the displacement of the connection jig 70 to the extending end of the arm portion 13 is not limited to the bent portion 13 c. For example, by making the width of the arm portion 13 at a portion closer to the extending end than the engaging position of the attaching jig 70 larger than the clamping width of the attaching jig 70 (larger than the width of the parallel portion 13b), the attaching jig 70 can be restricted from being displaced. Similarly, the structure for restricting the displacement of the attachment jig 70 to the base end of the arm portion 13 is not limited to the tapered portion 13 a. For example, the displacement of the attaching jig 70 may be restricted by providing a protrusion or the like at a predetermined position of the arm portion 13 closer to the base end than the engaging position of the attaching jig 70 and abutting the protrusion and the attaching jig 70. Compared with these modes, the bent portion 13c has an advantage in that the electric wire 1 is isolated from burrs due to the press process. However, when the contact between the burr and the electric wire 1 is allowed, these modes are advantageous in terms of easy processing and the like as compared with the bent portion 13 c.
Here, the features of the connection structure 5 and the bus bar module 41 according to the embodiment of the present invention will be briefly summarized in the following (1) to (5).
(1) A connecting structure (5), comprising:
a bus bar (11);
an electric wire (1) having a conductor core wire (2); and
a connecting clamp (70) is connected with the upper end of the connecting rod,
wherein the bus bar (11) comprises:
a bus bar main body (12); and
an arm portion (13) extending from the bus bar main body (12);
wherein the connection jig (70) is configured to set the electric wire (1) at a predetermined position (1) in an extending direction and a width direction of the arm portion (13) by engaging with the arm portion (13) while holding the electric wire (1); and is
Wherein the conductor core wire (2) is electrically connected to the bus bar (11) in a state where the electric wire (1) is disposed at a predetermined position.
(2) In the connection structure according to (1), the connection jig (70) includes:
a holding portion (21,31) configured to hold the electric wire (1);
a clamping portion (32) configured to restrict the connecting jig (70) from being displaced in the width direction with respect to the arm portion (13) by clamping the arm portion (13) in the width direction; and
an abutting portion configured to restrict displacement of the connecting jig (70) in the extending direction relative to the arm portion (13) by abutting against abutted portions (13a, 13c) of the arm portion (13) in the extending direction.
(3) In the connection structure according to (2), the arm portion (13) includes a wide portion (13a) serving as an abutted portion and a curved portion (13 c);
wherein the bent portion (13c) is positioned closer to an extending end of the attaching jig than an engaging position (13b) of the attaching jig (70), and is bent in a thickness direction of the arm portion (13); and is
Wherein the wide portion (13a) is positioned closer to the base end of the arm portion than the engaging position, and the width of the wide portion is larger than the gripping width of the gripping portion (32) in the engaging position (13 b).
(4) In the connection structure according to any of (1) to (3), the conductor core wire (2) is ultrasonically bonded to the bus bar (11), and
wherein the bus bar (11) is configured such that an angle (theta) between a side surface of the arm portion (13) in the width direction and a side surface of the bus bar main body (12) is larger than a right angle by gradually increasing the width of the arm portion (13) toward the base end in the vicinity of the base end of the arm portion (13).
(5) A bus bar module (41), comprising:
an electric wire wiring body (45) attached to a battery assembly (43) including a plurality of unit batteries (42); and
and a bus bar (11) that is accommodated and held in a bus bar accommodating portion (51) provided in the wire wiring body (45), wherein the conductor core wire (2) of the wire (1) wired in the wire wiring body is electrically connected to the bus bar (11).
The bus bar (11) and the conductor core (2) of the electric wire (1) are connected by the connection structure (5) according to any of (1) to (4).
Claims (5)
1, A connection structure, comprising:
a bus bar;
an electric wire having a conductor core wire; and
the clamp is connected with the base plate and the clamping plate,
wherein the bus bar includes:
a bus bar main body; and
an arm portion extending from the bus bar body;
wherein the attachment jig is configured to dispose the electric wire at a predetermined position in an extending direction and a width direction of the arm portion by engaging with the arm portion while holding the electric wire; and is
Wherein the conductor core wire is electrically connected to the bus bar in a state where the electric wire is disposed at the predetermined position.
2. The connecting structure according to claim 1, wherein,
wherein, the connecting jig includes:
a holding portion configured to hold the electric wire;
a holding portion configured to restrict the connecting jig from being displaced in the width direction with respect to the arm portion by holding the arm portion in the width direction; and
an abutting portion configured to restrict displacement of the connection jig in the extending direction relative to the arm portion by abutting against an abutted portion of the arm portion in the extending direction.
3. The connecting structure according to claim 2, wherein,
wherein the arm portion includes a wide portion serving as the abutted portion and a curved portion;
wherein the bent portion is positioned closer to an extending end of the attaching jig than an engaging position of the attaching jig and is bent in a thickness direction of the arm portion; and is
Wherein the wide portion is positioned closer to the base end of the arm portion than the engagement position, and a width of the wide portion is larger than a width of the arm portion in the engagement position.
4. The connecting structure according to any of claims 1 to 3,
wherein the conductor core wire is ultrasonically bonded to the bus bar; and is
Wherein the bus bar is configured such that an angle between a side surface of the arm portion in the width direction and a side surface of the bus bar main body is larger than a right angle by gradually increasing a width of the arm portion toward the base end in the vicinity of the base end of the arm portion.
A bus bar module of , comprising:
a wire wiring body attached to a battery assembly including a plurality of unit batteries; and
a bus bar that is accommodated and held in a bus bar accommodating portion provided in the electric wire wiring body, wherein a conductor core of the electric wire wired in the electric wire wiring body is electrically connected to the bus bar,
wherein the bus bar and the conductor core of the electric wire are connected by the connection structure of any of claims 1 to 4.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018135075A JP6865717B2 (en) | 2018-07-18 | 2018-07-18 | Connection structure between bus bar and electric wire, and bus bar module |
| JP2018-135075 | 2018-07-18 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110739562A true CN110739562A (en) | 2020-01-31 |
| CN110739562B CN110739562B (en) | 2020-12-11 |
Family
ID=69148444
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910644524.7A Active CN110739562B (en) | 2018-07-18 | 2019-07-17 | Bus bar and electric wire connecting structure and bus bar module |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP6865717B2 (en) |
| CN (1) | CN110739562B (en) |
| DE (1) | DE102019210535A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102021123830A1 (en) * | 2021-09-15 | 2023-03-16 | Md Elektronik Gmbh | Soldering aid, assembly and method for fixing a stranded wire on a contact area of a printed circuit board |
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| US7134893B1 (en) * | 2006-03-23 | 2006-11-14 | Yazaki North America, Inc. | Pull-lock terminal connection system |
| CN1947210A (en) * | 2004-04-30 | 2007-04-11 | 西门子公司 | Connector lug |
| JP2012059500A (en) * | 2010-09-08 | 2012-03-22 | Auto Network Gijutsu Kenkyusho:Kk | Battery module |
| CN103931024A (en) * | 2011-11-11 | 2014-07-16 | 株式会社自动网络技术研究所 | Battery wiring module |
| CN104685723A (en) * | 2012-09-20 | 2015-06-03 | 矢崎总业株式会社 | Pressure-welding connection unit |
| CN105390648A (en) * | 2014-08-27 | 2016-03-09 | 株式会社杰士汤浅国际 | Energy storage apparatus |
| DE102016222703A1 (en) * | 2015-11-20 | 2017-05-24 | Yazaki Corporation | Busbar support structure |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6846624B2 (en) | 2017-02-23 | 2021-03-24 | パナソニックＩｐマネジメント株式会社 | Image display system, image display method and program |
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2018
- 2018-07-18 JP JP2018135075A patent/JP6865717B2/en active Active
-
2019
- 2019-07-17 DE DE102019210535.1A patent/DE102019210535A1/en not_active Withdrawn
- 2019-07-17 CN CN201910644524.7A patent/CN110739562B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS5348984Y1 (en) * | 1969-01-29 | 1978-11-24 | ||
| JP2003047132A (en) * | 2001-07-31 | 2003-02-14 | Yazaki Corp | Installation structure of ptc device to electric junction box |
| CN1947210A (en) * | 2004-04-30 | 2007-04-11 | 西门子公司 | Connector lug |
| US7134893B1 (en) * | 2006-03-23 | 2006-11-14 | Yazaki North America, Inc. | Pull-lock terminal connection system |
| JP2012059500A (en) * | 2010-09-08 | 2012-03-22 | Auto Network Gijutsu Kenkyusho:Kk | Battery module |
| CN103931024A (en) * | 2011-11-11 | 2014-07-16 | 株式会社自动网络技术研究所 | Battery wiring module |
| CN104685723A (en) * | 2012-09-20 | 2015-06-03 | 矢崎总业株式会社 | Pressure-welding connection unit |
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| DE102016222703A1 (en) * | 2015-11-20 | 2017-05-24 | Yazaki Corporation | Busbar support structure |
Also Published As
| Publication number | Publication date |
|---|---|
| JP6865717B2 (en) | 2021-04-28 |
| DE102019210535A1 (en) | 2020-01-23 |
| CN110739562B (en) | 2020-12-11 |
| JP2020013699A (en) | 2020-01-23 |
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