JP2010257944A - Module terminal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent interference of a male screw screwed to a module terminal. <P>SOLUTION: The module terminal 1 includes a terminal body 10 made of a metal plate and an interference prevention member 20 which is installed on the terminal body 10 and has insulation property. The terminal body 10 is electrically connected to an electrode of a battery pack 3 at one end 11, and is formed integrally as its female screw part 15 is penetrated through the terminal part 12. A male screw 5 screwed to the female screw 15 penetrates through the terminal part 12 of the terminal body 10 and its top end is arranged at a position opposed to the end face of the battery pack 3. Since the interference prevention member 20 is arranged between the top end of the male screw 5 and the end face of the battery pack 3, it avoids that the male screw 5 interferes with a body of a lamination battery cell 2 and its terminals or the like. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a module terminal incorporated to input / output electric power to / from a secondary battery module and the like. For example, a plurality of modules are connected to form a secondary battery of an electric vehicle (including a hybrid car). The present invention relates to a terminal suitable for a module.

  In recent years, attention has been focused on low-emission vehicles equipped with a secondary battery having a charging function due to increasing awareness of environmental protection. Therefore, research and development for the purpose of increasing the charging capacity of the secondary battery has also progressed, and for example, a lithium ion secondary battery module as shown in Patent Document 1 has been proposed.

  In the same document, a secondary battery cell constituting a secondary battery module has a structure in which positive electrodes and negative electrodes (internal electrode pairs) are alternately stacked with a separator interposed therebetween, and an electrolytic solution is sealed with an insulating bag-shaped envelope. With this, the density of the charged energy is increased. As described above, the secondary battery module is further increased in capacity by stacking a plurality of secondary battery cells (hereinafter also referred to as laminated battery cells) and connecting them in series.

JP 2004-111098 A

  Now, in a secondary battery module composed of a plurality of laminated battery cells as in Patent Document 1, a male screw for fixing electrical wiring is screwed into a terminal provided in the laminated battery cell. If the male screw is not screwed in at this time, the tip of the male screw will collide with the main body of the stacked battery cell and damage the battery cell, or the tip of the male screw may contact the terminals and electrodes of the stacked battery cell. Could cause a short circuit.

  The present invention has been made in view of such a situation, and provides a module terminal in which a male screw screwed into a female screw portion of a terminal main body does not interfere with the main body of the laminated battery cell and its terminals. Objective.

In order to achieve the above object, the invention of claim 1 is a module terminal incorporated as a terminal for inputting and outputting power to a module incorporating a battery pack formed by connecting a plurality of stacked battery cells,
A terminal body made of a metal plate, having a terminal portion for fixing electric wiring in cooperation with the male screw, and electrically connected to the electrode of the assembled battery;
Including an interference preventing member having insulating properties attached to the terminal body,
The terminal main body or the interference prevention member has a female screw portion into which the male screw is screwed, and the male screw screwed into the female screw portion is arranged at a position where the tip faces the end face of the assembled battery. ,
The interference preventing member is disposed between a tip of a male screw screwed into the female screw portion and an end surface of the assembled battery, and is attached to the terminal body in a detachable manner, and the female screw portion. And a wall portion disposed between the front end of the screwed male screw and the end face of the assembled battery.

The invention of claim 2 is based on the premise of claim 1,
The terminal body has a configuration in which one end portion forms the terminal portion and the terminal portion has the female screw portion.

Further, the invention of claim 3 is based on the description of claim 2,
The terminal body is formed with a flat mounting region,
The attachment portion of the interference preventing member is disposed in parallel with a flat base and a bottom surface of the base at a predetermined interval, and is connected to the base at one side edge and can be flexibly elastically bent. A clip-shaped mounting piece, and
The interference preventing member is slidably attached to the attachment region with the attachment region of the terminal body sandwiched between the base and the attachment piece.

The invention of claim 4 is based on the premise of claim 3,
The mounting portion of the interference preventing member is fitted into the mounting region of the terminal body from the other side edge of the base and the mounting piece, and the mounting region of the terminal body is mounted on the other side edge of the base and the mounting piece. A disengagement prevention claw that engages with the edge of the head is formed.

The invention of claim 5 is based on the premise of claim 3 or 4,
The terminal main body is formed with a bent end position near the other end in the mounting region, and the bent portion constitutes a stopper that regulates a sliding range of the interference preventing member.

The invention of claim 6 is based on the description of any one of claims 2 to 5,
An urging means for urging the interference preventing member toward the terminal portion where the female thread portion of the terminal body is formed is provided.

And the invention of claim 7 is based on the description of any one of claims 2 to 6,
The terminal body is characterized in that a cylindrical bulging portion is drawn from the terminal portion and the female screw portion is formed on an inner peripheral surface of the bulging portion.

The invention of claim 8 is based on the premise of claim 1,
The interference preventing member is configured to have the female screw portion facing the wall portion.

The invention of claim 9 is based on the premise of claim 8,
The female screw portion includes a female screw holding portion formed at a portion facing the wall portion and a nut member attached to the female screw holding portion.

The invention of claim 10 is based on the premise of claim 9,
The module includes a casing that houses the assembled battery, and the casing is formed with a rectangular tube-shaped extending portion,
The female screw holding portion is inserted and disposed in the rectangular tube-like extension portion, and is configured to abut against the inner peripheral surface of the extension portion with respect to a rotational moment received from the male screw and restrict the accompanying rotation. It is characterized by that.

The invention of claim 11 is based on the premise of claim 10,
The interference prevention member has side walls on both the left and right side surfaces, and each side wall is connected to the wall portion and the female screw holding portion, and is inserted and arranged in the rectangular tube-shaped extension portion. The rotating moment received from the male screw is configured to abut against the inner peripheral surface of the extending portion and restrict the accompanying rotation.

The invention of claim 12 is characterized in that, on the premise of the description of claim 10 or 11, the following configurations (a) to (e) are further provided.
(A) The terminal main body has one end portion forming the terminal portion, and a mounting region for the interference preventing member is formed in a portion other than the one end portion.
(B) The female screw holding portion has a front wall portion disposed opposite to the terminal portion of the terminal body, and a peripheral wall portion covering the periphery of the terminal portion, and the front wall portion and the peripheral wall portion are connected to each other. Yes.
(C) The interference prevention member has a locking claw that elastically engages with the mounting region of the terminal body at the attachment portion,
The female screw holding part is formed with a notch part for introducing and guiding the terminal part of the terminal main body to a position opposed to the front wall part in a part of the peripheral wall part,
In the process of introducing the terminal portion of the terminal main body from the notch and guiding the terminal portion to a position opposite to the front wall portion, the locking claw is elastically engaged with the mounting region of the terminal main body. It has a configuration.
(D) the terminal body has a positioning hole in the mounting region;
The interference preventing member has a positioning pin inserted into the positioning hole,
The positioning pin is inserted into the positioning hole in the process of introducing the terminal portion of the terminal main body from the notch portion and guiding the terminal portion to the facing position of the front wall portion.
(E) The positioning pin is formed in a pyramid shape that tapers from the root toward the tip, and the top of each side at the root is set to a dimension that maintains a contact state with the inner periphery of the positioning hole. is there.

The invention of claim 13 is based on the premise of any one of claims 1 to 12,
The terminal body is formed by three-dimensionally bending a band-shaped metal plate, and has a twisted portion that is caused by twisting the metal plate and extending in a perpendicular direction at the intermediate portion. Features.

  According to the first, second, and eighth inventions described above, the interference preventing member is interposed between the tip of the male screw screwed into the female screw portion and the end surface of the assembled battery. For this reason, since the front-end | tip of the screwed male screw contact | abuts to an interference prevention member, interference with the main body of a laminated battery cell, its terminal, etc. can be avoided. Moreover, simply by attaching the interference prevention member mounting portion to the terminal body, the wall portion can be disposed between the front end of the male screw screwed into the female screw portion and the end face of the assembled battery. Thus, it is possible to form an interference prevention structure with the main body of the laminated battery cell and its terminals.

  According to the invention of claim 3, the interference prevention member can be easily attached to the terminal body simply by sandwiching the attachment region of the terminal body between the base portion of the interference prevention member and the mounting piece. In addition, since the interference preventing member is slidable with respect to the mounting area of the terminal main body, even if the protruding length of the male screw tip is different, it can flexibly cope with it.

  According to the fourth aspect of the present invention, the disengagement prevention claw formed on the interference preventing member engages with the edge of the mounting region of the terminal body, whereby the interference preventing member can be prevented from unintentionally falling off.

  According to the invention of claim 5, by restricting the sliding range of the interference preventing member with the stopper, the interference preventing member comes into contact with the main body of the laminated battery cell, its terminal, etc. with the pressing force transmitted from the male screw, The risk of damaging the laminated battery cell and its terminals can be avoided.

  According to the invention of claim 6, since the interference preventing member is urged toward the terminal portion of the terminal body by the urging means, the tip of the male screw screwed into the female screw portion formed in the terminal portion of the interference preventing member In addition, the interference member comes into contact with the urging force. Therefore, even if it receives vibration from the outside, it is possible to prevent the interference preventing member from rattling or unintentional free sliding.

  According to the seventh aspect of the present invention, since the internal thread portion is integrally formed by simple machining on one end portion (terminal portion) of the terminal body made of a metal plate, the nut member is welded to one end portion of the terminal body. The number of parts is small compared to the configuration such as, and it is also suitable for mass production.

  On the other hand, according to the ninth aspect of the present invention, since the female thread portion is configured simply by incorporating the nut member into the female thread holding portion formed in the interference preventing member, the assembly work can be easily performed. For example, if the interference prevention member is manufactured by resin molding, the female screw holding part can be formed integrally, and further, it is not necessary to thread the terminal member or weld the nut member, so the manufacturing process can be simplified. It is.

  According to the invention of claim 10, when the male screw is screwed into the female screw portion, the female screw holding portion abuts against the inner peripheral surface of the extending portion of the casing to restrict the accompanying member and the terminal body to which the interference member is attached. Therefore, there is no possibility that the terminal body moves and breaks the electrical connection state between the assembled battery electrodes.

  According to the eleventh aspect of the present invention, the side wall formed on the interference preventing member abuts on the inner peripheral surface of the extending portion of the casing and restricts the interference member and the terminal body to which the interference member is attached. The member is not affected by the torsional moment, and the electrical connection state between the terminal body and the electrode of the assembled battery can be maintained more stably.

According to the twelfth aspect of the present invention, the periphery of the terminal portion of the terminal main body is covered with the peripheral wall portion formed in the female screw holding portion of the interference preventing member, so that the terminal portion comes into contact with the inner peripheral surface of the extending portion of the casing. Metal hitting sound can be prevented.
In addition, simply by introducing the terminal part of the terminal body from the notch formed in the female screw holding part and guiding the terminal part to the opposite position of the front wall part, the locking claw is attached to the terminal body. Since it is guided so as to be elastically engaged with the mounting area, the locking claw can be engaged with the mounting area of the terminal body in an appropriate posture. In addition, the positioning pin is also inserted into the positioning hole in an appropriate posture during the assembly process. Accordingly, there is no possibility that excessive stress acts on the locking claw and the positioning pin to damage them.

  According to the invention of claim 13, since the terminal body is formed by bending the belt-shaped metal plate, there is less material waste compared to the punching process, the material yield is good, and the material cost can be kept low. It becomes possible.

  As described above, according to the module terminal of the present invention, there is no possibility that the male screw screwed into the female screw part interferes with the main body of the laminated battery cell, its terminal, etc., and the laminated battery cell main body, its terminal, etc. A remarkable effect can be exerted in preventing breakage and preventing short circuit of the laminated battery cell.

It is a disassembled perspective view which shows the secondary battery comprised by the module provided with the module terminal which concerns on 1st Embodiment of this invention, and the module. It is a perspective view which shows the external appearance of the module provided with the terminal for modules which concerns on 1st Embodiment of this invention. It is a perspective view which shows the internal structure of the module shown in FIG. It is the schematic which shows the electrical connection relationship of the laminated battery cell accommodated in the inside of the module shown in FIG. It is a perspective view showing the whole module terminal composition concerning a 1st embodiment of the present invention. It is a projection view of the module terminal which concerns on 1st Embodiment of this invention, (a) is a top view, (b) is a front view, (c) is a side view. It is the perspective view and projection view which show the terminal main body of the module which concerns on 1st Embodiment of this invention. It is the perspective view and projection view which show the interference prevention member of the module which concerns on 1st Embodiment of this invention. It is side surface sectional drawing which showed sequentially the operation | movement which screws in a male screw with respect to the module terminal which concerns on 1st Embodiment of this invention. It is a fragmentary perspective view which shows the screwing state of the module terminal and male screw which concern on 1st Embodiment of this invention. (A) is side sectional drawing which shows the screwing state of the terminal for modules and a male screw, (b) is side sectional drawing which illustrates the case where there is no interference prevention member. It is the perspective view and projection view which show the modification of the module terminal which concerns on 1st Embodiment of this invention. It is a perspective view which shows the other modification of the module terminal which concerns on 1st Embodiment of this invention. It is a perspective view which shows the external appearance of the module provided with the terminal for modules which concerns on 2nd Embodiment of this invention. It is a disassembled perspective view which shows the internal structure of the module shown in FIG. It is a perspective view which shows the electrical connection relation of the laminated battery cell accommodated in the module shown in FIG. 14, and the terminal for modules. In 2nd Embodiment of this invention, it shows three types of module terminals integrated in a module, (a) and (b) looked at one of the module terminals for power input / output from a different direction, respectively. (C) (d) is the perspective view which looked at the module terminal for intermediate voltage measurement from a different direction, respectively. (E) and (f) show another one of the module terminals for power input / output. It is the perspective view seen from each different direction. It is a disassembled perspective view which shows the terminal for modules which concerns on 2nd Embodiment of this invention. It is a figure for demonstrating the structure of the terminal main body which concerns on 2nd Embodiment of this invention, (a) is a top view which shows the metal plate (material) before a process, (b) is a perspective view of a terminal main body. It is a figure for demonstrating the structure of the interference prevention member which concerns on 2nd Embodiment of this invention, (a) is a perspective view of an interference prevention member, (b) is a perspective view which shows the state which assembled | attached the interference prevention member to the terminal main body. FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[First Embodiment]
1 to 13 are diagrams for explaining a module terminal according to the first embodiment of the present invention.
The module terminal 1 of the present embodiment is incorporated as a terminal for inputting / outputting electric power to a module 4 including an assembled battery 3 formed by connecting a plurality of stacked battery cells 2. The module 4 is used as a secondary battery 100 mounted on an electric vehicle, for example.

FIG. 1 is an exploded perspective view showing a module including module terminals according to the present embodiment and a secondary battery constituted by the module.
For example, as shown in FIG. 1, the secondary battery 100 mounted in an electric vehicle is assembled by arranging a plurality of modules 4 in the horizontal direction and connecting adjacent modules 4 in series. In this connection, the male screw 5 is screwed into the module terminal 1 via the conductive plate 6 a of the bus bar 6. In the bus bar 6, the conductive plates 6 a are arranged in advance so that the modules 4 are connected in series, and the secondary battery 100 can be configured only by screwing the male screw 5. The secondary battery 100 is increased in capacity by a plurality of modules 4 connected in series, and becomes a power supply source suitable for an electric vehicle.
The module 4 is not limited to the application to the secondary battery 100 of an electric vehicle, but can be applied to, for example, UPS (uninterruptible power supply), power load leveling, etc. is there.

FIG. 2 is a perspective view showing an external appearance of a module including the module terminal according to the present embodiment, and FIG. 3 is a perspective view showing an internal configuration of FIG.
As shown in FIGS. 2 and 3, the module 4 includes an assembled battery 3 configured by connecting a plurality of stacked battery cells 2, a casing 30 that covers the assembled battery 3, and power input / output of the assembled battery 3. And a module terminal 1 incorporated for use.

  The laminated battery cell 2 constituting the assembled battery 3 uses a lithium ion battery having high energy density and high sealing performance. The lithium ion battery of this embodiment is a sheet-like battery in which an internal electrode pair, a separator, and an electrolytic solution (both not shown) are planar rectangular and sealed by a flexible bag-shaped outer package 2a. Since the internal structure and principle of this lithium ion battery are well known, detailed description thereof will be omitted. The bag-like outer package 2a is formed of a laminate film including an inner layer surface made of thermoplastic resin, an intermediate layer made of metal foil, and an outer surface layer made of insulating resin. Since the laminated battery cell 2 is sealed in the bag-shaped outer package 2a, electrical insulation is ensured except for the positive electrode terminal 2b and the negative electrode terminal 2c extending to the outside of the package.

As shown in FIG. 3, the assembled battery 3 is configured by stacking the stacked battery cells 2 in a plurality of layers (three layers in the present embodiment) and arranging a plurality of rows (two rows in the present embodiment). For example, as shown in FIG. 4, in the plurality of stacked battery cells 2, a positive electrode terminal 2b and a negative electrode terminal 2c are electrically connected via a conductive member 3a. Thereby, the assembled battery 3 is formed with a circuit configuration in which the stacked battery cells 2 are connected in series. The module terminal 1 is incorporated as a terminal structure for inputting / outputting electric power to the terminal laminated battery cell 2 constituting both electrodes of the assembled battery 3.
When the assembled battery 3 is configured by connecting, for example, two rows and two layers of stacked battery cells 2, the positive electrode terminal 2 b and the negative electrode terminal 2 c are electrically connected as shown in FIG. 4 of Patent Document 1. be able to. Moreover, the method shown by FIG. 5, FIG. 6 of the same literature is employable also about the connection method between each terminal of the laminated battery cell 2. FIG.

  The casing 30 constitutes an external part of the module 4 as shown in FIG. The assembled battery 3 is accommodated in the casing 30. The casing 30 includes a cylindrical body 31 formed in a rectangular shape, and lid bodies 32 that are attached to both ends of the cylindrical body 31. The cylindrical body 31 can be formed using an aluminum alloy in consideration of, for example, strength sufficient to hold a rectangular shape and weight reduction of the module 4. On the other hand, the lid body 32 is made of a synthetic resin having electrical insulation, and has a housing space (not shown) that can reliably insulate between the positive electrode terminal 2b and the negative electrode terminal 2c of each stacked battery cell 2 constituting the assembled battery 3. Is formed. With this lid 32, for example, the secondary battery 100 is mounted on an electric vehicle, and contact between the terminals of each stacked battery cell 2 can be prevented even when vibration during traveling, impact during collision, or the like is applied. .

  FIG. 5 is a perspective view showing the overall configuration of the module terminal according to the present embodiment, FIG. 6 is a projection view of the module terminal, (a) is a top view, (b) is a front view, (C) is a side view. 7 is a perspective view and a projected view showing a terminal body of the module, and FIG. 8 is a perspective view and a projected view showing an interference preventing member of the module.

As shown in FIGS. 5 to 8, the module terminal 1 includes a terminal body 10 and an interference prevention member 20.
The terminal body 10 is formed of a copper metal plate and has a structure having conductivity and plasticity. The terminal body 10 is formed by bending a metal plate into a stepped shape as shown in FIG. The terminal body 10 includes a terminal portion 12 formed by bending one end portion thereof at a substantially right angle, a second end portion 11 formed on a flat end surface, and a root of the terminal portion 12 from the other end portion via a bent portion 16. And a flat mounting region 13 extending up to a distance.

  The other end 11 of the terminal body 10 is inserted into the end-side stacked battery cell 2 constituting the assembled battery 3 and connected to the internal electrode pair in the bag-like outer package 2a. Thereby, the module terminal 1 is electrically connected as a terminal for inputting / outputting electric power to / from the assembled battery 3.

  The mounting region 13 extends from the end surface of the assembled battery 3 with respect to the other end portion 11 connected to the assembled battery 3. As will be described later, an interference preventing member 20 is attached to the attachment region 13.

  One end portion constitutes a terminal portion 12 for fixing the electrical wiring in cooperation with the male screw 5. The terminal portion 12 is formed in a substantially square flat plate shape, and a bulging portion 14 is formed at the center portion thereof. The bulging portion 14 is formed by drawing the terminal portion 12 into a cylindrical shape, and an internal thread portion 15 is formed on the inner peripheral surface thereof. In this way, the female screw portion 15 is integrally formed by simply drawing the other end portion of the terminal body 10 and threading the inner peripheral surface thereof. The open end surface of the female screw portion 15 faces the assembled battery 3. The male screw 5 is screwed into the female screw portion 15 from the opening on the base end side.

  On the other hand, as shown in FIG. 8, the interference preventing member 20 is a resin molded product using an insulating synthetic resin material, and the mounting portion 21 and the wall portion 22 are integrally formed. The attachment portion 21 is formed by a flat base portion 21a and attachment pieces 21b arranged in parallel with the bottom surface of the base portion 21a with a certain distance. The base 21a and the attachment piece 21b are connected at one side edge and are formed in a substantially U shape as a whole. And the attachment piece 21b becomes the clip shape which can be bent elastically. The base portion 21a and the mounting piece 21b of the mounting portion 21 are respectively formed with disengagement prevention claws 27 on the other side edges (side edges opposite to the connected edge portions).

  The interference prevention member 20 is slidably attached to the terminal body 10 by sandwiching the attachment region 13 between the base portion 21a and the attachment piece 21b. At this time, the disengagement prevention claw 27 engages with the edge of the mounting region 13 in the terminal body 10 to prevent the interference prevention member 20 from unintentionally falling off. On the other hand, the interference preventing member 20 can be easily removed from the mounting region 13 simply by bending the mounting piece 21b to widen the gap with the base 21a and releasing the engagement of the disengagement prevention claw 27 with respect to the terminal body 10. It has become. Thus, the interference preventing member 20 is detachable with a simple structure, can be easily assembled to the terminal body 10, and has good workability.

  The mounting piece 21b has a rib 23 on the surface facing the base portion 21a. The rib 23 bends the attachment piece 21b to increase its elastic force, and improves the frictional force between the base portion 21a and the mounting region 13 of the attachment portion 21. Thereby, the interference preventing member 20 is prevented from freely moving on the mounting region 13.

  The wall portion 22 protrudes from the rear end portion of the mounting portion 21 in the orthogonal direction and is formed in a flat plate shape. Supporting walls 24 are integrally formed on both sides of the wall portion 22 to reinforce the rigidity against pressing in the front-rear direction (see FIG. 8). The front end surface of the male screw 5 faces the support wall 24 when the male screw 5 described later is screwed and in a screwed state.

Next, a method for assembling the module terminal 1 of this embodiment will be described.
In the manufacturing process of the laminated battery cell 2, the terminal body 10 is electrically connected by inserting the other end portion 11 into the laminated battery cell 2 in advance. The module terminal 1 is assembled by attaching the interference preventing member 20 to the terminal body 10 extending from the laminated battery cell 2. Specifically, as shown in FIG. 6, the mounting portion 21 is adjusted by adjusting the posture of the interference preventing member 20 so that the wall portion 22 faces the terminal portion 12 and is positioned closer to the laminated battery cell 2. It is sandwiched in the mounting area 13. Thereby, the interference preventing member 20 is mounted such that the mounting portion 21 is slidable on the mounting region 13 (see FIG. 6C).

In the assembled state of the module terminal 1, the wall portion 22 is positioned closer to the stacked battery cell 2, so that a sufficient movement section of the interference preventing member 20 is ensured.
Here, the terminal body 10 is bent at the end position near the other end portion 11 in the mounting region 13, and the bent portion 16 constitutes a stopper that regulates the sliding range of the interference preventing member 20. Thereby, the attachment part 21 becomes slidable between the terminal part 12 and the bending part 16 (namely, on the mounting area | region 13).

  In the assembled state, the wall portion 22 of the interference preventing member 20 faces the end edge of the bulging portion 14 extending from the terminal portion 12 in a parallel posture. Thus, the wall portion 22 is interposed as a partition wall between the female screw portion 15 on the inner peripheral surface of the bulging portion 14 and the end surface of the assembled battery 3.

  The module terminal 1 assembled in this way is engaged and fixed to the lid 32 of the casing 30 when the assembled battery 3 is accommodated in the casing 30. As shown in FIG. 2, the casing 30 has a pair of rectangular tube-like extending portions 33 formed at predetermined positions on the side surface of the lid 32, and an insertion hole 34 formed in the extending portion 33. Inside, the module terminal 1 is inserted.

As described above, the terminal body 10 has the terminal portion 12 formed in a substantially square shape. The interference prevention member 20 also has a shape including a square portion on the front surface due to the attachment piece of the attachment portion 21 and the support wall 24. Therefore, as shown in FIG. 2, when the module terminal 1 is inserted into the rectangular hole-shaped insertion hole 34, the inner peripheral surface of the insertion hole 34 fits into the terminal portion 12 and the interference prevention member 20. The terminal 1 can be arranged in a rotation stopped state. Thus, when the module terminal 1 is in the rotation stopped state, the screwing operation of the male screw 5 with respect to the female screw portion 15 can be performed more efficiently.
By assembling as described above, the module 4 is completed as a configuration including the module terminal 1.

FIG. 9 is a side cross-sectional view sequentially showing the operation of screwing the male screw into the module terminal according to the present embodiment. Next, with reference to the figure, the operation | movement and effect | action at the time of screwing the male screw 5 in the module terminal 1 are demonstrated.
When connecting the module 4 having the above-described configuration to the bus bar 6, the conductive plate 6a of the bus bar 6 and the terminal portion 12 are overlapped so that the screw hole of the conductive plate 6a and the female screw portion 15 of the terminal portion 12 are aligned. The male screw 5 is inserted into and screwed together (see FIG. 9A).

When the male screw 5 is screwed in this state, the tip surface comes into contact with the wall portion 22 of the interference preventing member 20 (see FIG. 9B). At this time, the cylindrical bulge portion 14 can guide the insertion direction of the male screw 5, and can effectively abut the male screw 5 against the wall portion 22.
Further, when the male screw 5 is screwed, the wall portion 22 is pressed by the tip surface of the male screw 5. Here, since the insertion direction of the male screw 5 and the extending direction of the mounting region 13 are the same direction, the module terminal 1 can smoothly move the mounting portion 21 in parallel with the pressing of the wall portion 22. it can.

The attachment portion 21 is moved by being pushed to the side of the laminated battery cell 2 by a necessary amount in accordance with the insertion of the male screw 5, and in a state where the male screw 5 completely fastens the conductive plate 6 a and the module terminal 1. The movement is also stopped (see FIG. 9C). In a state in which the male screw 5 is fastened to the module terminal 1, the wall portion 22 is in a position in contact with the male screw 5, and a sufficient space on the assembled battery 3 side in the module 4 can be secured. Therefore, for example, if the space is designed to be minimized, the module 4 itself can be downsized.
Further, since the interference preventing member 20 is slidable with respect to the mounting region 13, even if the protruding length of the tip of the male screw 5 is different, it can be flexibly dealt with and is excellent in versatility.

FIG. 10 is a partial perspective view showing a screwed state of the module terminal and the male screw according to the present embodiment, FIG. 11A is a side sectional view showing the same state, and FIG. 11B is an interference preventing member. It is side surface sectional drawing which illustrates the case where there is no.
As shown in FIGS. 10 and 11A, the module terminal 1 has the wall portion 22 of the interference prevention member 20 between the front end of the male screw 5 and the end surface of the assembled battery 3 in a state where the male screw 5 is fastened. Will be intervened. That is, the wall portion 22 prevents the male screw 5 screwed into the female screw portion 15 from interfering with the positive electrode terminal 2b and the negative electrode terminal 2c (and the conductive member 3a) of the stacked battery cell 2 connected as the assembled battery 3. .

  Here, for example, as shown in FIG. 11 (b), when there is no interference preventing member 20, the male screw 5 screwed into the female screw portion 15 penetrates the terminal portion 12 of the terminal body 10 and the tip of the assembled battery 3. It arrange | positions in the position facing an end surface. In this state, when vibration or impact is applied to the module 4, the stacked battery cell 2 connected as the assembled battery 3 is moved, and the terminals 2 b and 2 c (including the conductive member 3 a) of the stacked battery cell 2 are externally threaded 5. There was a possibility of interfering with the tip. Thus, when the external thread 5 interferes, a part of circuit structure which connected the some laminated battery cell 2 in series will be short-circuited. When this short circuit occurs, the supply voltage of the module 4 decreases, and the energy density as a battery becomes unstable. In addition, the module 4 may cause heat generation or ignition due to a short circuit.

  However, as shown in FIG. 11A, if the wall 22 is interposed between the tip of the male screw 5 and the end face of the assembled battery 3, the terminals 2b and 2c (and the conductive member 3a) of the stacked battery cell 2 are connected. And the male screw 5 can be easily prevented. Thereby, the energy density of the module 4 can be easily stabilized without causing a short circuit in the connection between the stacked battery cells 2. Furthermore, damage to the laminated battery cell 2 and the terminals 2b and 2c (and the conductive member 3a) caused by the interference of the male screw 5 can be prevented.

[Modification 1]
FIG. 12 is a perspective view and a projection view showing a modification of the module terminal according to the present embodiment.
When the interference preventing member 20 is resin-molded, the module terminal 1 can be integrally molded with an elastic piece (biasing means) 25 in the mounting portion 21 (see FIGS. 12C and 12D). When the elastic piece 25 moves the attachment portion 21 to the side of the laminated battery cell 2, the tip portion thereof comes into contact with the bent portion 16 of the terminal body 10 and is elastically bent. As a result, the urging force acts in the direction opposite to the moving direction of the attachment portion 21 (the direction of the terminal portion 12), and the interference preventing member 20 can be elastically pushed back. Therefore, as shown in FIG. 12 (e), when the male screw 5 is screwed into the female screw portion 15 of the module terminal 1, the wall portion 22 is in contact with the tip of the male screw 5 with a biasing force. Therefore, even if it receives vibration from the outside, it is possible to prevent the interference preventing member 20 from rattling or unintentional free sliding.

  Also, as shown in FIGS. 12A and 12B, the module terminal 1 may include a side wall 26 that extends from the peripheral edge of the protruding wall portion 22 in parallel with the base portion 21 a of the mounting portion 21. . In a state where the interference preventing member 20 is positioned on the terminal portion 12 side, the female screw portion 15 is inserted into a space formed by the wall portion 22 and the side wall 26 (see FIG. 12D). As a result, the inside of the insertion hole 34 before the male screw 5 is screwed is closed by the wall portion 22 and the side wall 26 of the interference preventing member 20, and dust and dust are prevented from entering the module 4 from the female screw portion 15. be able to.

  Moreover, the side wall 26 is disposed in the insertion hole 34 of the lid 32 shown in FIG. 2 together with the terminal portion 12 of the terminal body 10, and is rotated by the inner peripheral surface (the inner wall of the extending portion 33 provided in the periphery). Is blocked. That is, when the male screw 5 is screwed into the female screw portion 15, the rotational force of the male screw 5 is transmitted to the interference preventing member 20 through the terminal body 10. The rotational force is received by the side wall 26 and the terminal portion 12 of the terminal body 10 being in contact with the inner peripheral surface of the insertion hole 34 (see FIG. 2), and functions as a detent for the terminal body 10 and the interference prevention member 20. .

[Modification 2]
FIG. 13 is a perspective view showing another modification of the module terminal according to the present embodiment.
As shown in FIG. 13, the interference preventing member 20 may have a shape in which arm portions 28 corresponding to the plate thickness of the mounting region 13 of the terminal body 10 extend from both end portions of the base portion 21a. A disengagement prevention claw 27 that engages the edge of the mounting region 13 is provided at the tip of each arm portion 28, and the interference preventing member 20 can be easily attached to the terminal body 10 by sandwiching each arm portion 28 in the mounting region 13. Can be attached to.
That is, the interference preventing member 20 only needs to be interposed between the tip of the male screw 5 and the end surface of the assembled battery 3 to prevent the male screw 5 from interfering, and the shape and the like of the mounting portion 21 and the wall portion 22 can be appropriately designed. .

[Second Embodiment]
Next, a second embodiment of the present invention will be described in detail with reference to the drawings.
14 to 20 are diagrams for explaining a module terminal according to the second embodiment of the present invention. In addition, the same code | symbol is attached | subjected to the same part as 1st Embodiment demonstrated previously, or the part corresponding, and the detailed description of the part may be abbreviate | omitted.

  FIG. 14 is a perspective view showing an external appearance of a module including module terminals according to the present embodiment, and FIG. 15 is a perspective view showing an internal configuration of the module shown in FIG. FIG. 16 is an exploded perspective view showing an electrical connection relationship between the laminated battery cells housed in the module shown in FIG. 14 and the module terminals.

  As shown in FIG. 14, the module terminal 1 of this embodiment also has power compared to the module 4 including the assembled battery 3 formed by connecting a plurality of stacked battery cells 2 as in the first embodiment. It is incorporated as a terminal that inputs and outputs.

  As shown in FIGS. 14 and 15, the module 4 includes an assembled battery 3 configured by connecting a plurality of stacked battery cells 2, a casing 30 that covers the assembled battery 3, and power input / output of the assembled battery 3. And a module terminal 1 incorporated for use. In addition, about the structure of the laminated battery cell 2 which comprises the assembled battery 3, it is as having already stated in 1st Embodiment.

As shown in FIG. 15, the assembled battery 3 stacks the stacked battery cells 2 in a plurality of layers (four layers in the present embodiment) and a plurality of rows (not shown, but in the present embodiment also in the first embodiment). Like two things, it is arranged side by side. Although not shown in the figure, each of the stacked battery cells 2 arranged side by side on the same flat plate is connected to the positive electrode terminal 2b and the negative electrode by the conductive member 3a at the rear end as in the first embodiment. Terminal 2c is electrically connected (see FIG. 4).
On the other hand, on the front end side, as shown in FIG. 16, the positive electrode terminal 2 b and the negative electrode terminal 2 c of each of the stacked battery cells 2 stacked from the bottom and two from the top are electrically connected by the module terminal 1. Connected to. Further, the module 4 of the present embodiment includes a module terminal (1A in FIG. 16) for measuring an intermediate voltage of the assembled battery 3. The module terminal 1A is electrically connected to the electrode terminals (positive electrode terminal 2b or negative electrode terminal 2c) of four stacked battery cells 2 stacked in four layers.
In the present embodiment, two module terminals 1 (arranged on the left and right) for power input and output and a module terminal 1 for intermediate voltage measurement (arranged in the center) are incorporated in the module 4.

FIGS. 17A and 17B show three types of module terminals incorporated in the module according to the present embodiment. FIGS. 17A and 17B are perspective views of one of the power input / output module terminals viewed from different directions. Figures (c) and (d) are perspective views of module terminals for measuring intermediate voltages from different directions, and (e) and (f) show other ones of module terminals for power input and output, respectively. It is the perspective view seen from another direction.
As shown in the figure, the three types of module terminals 1 are different in the shape of the terminal body 10 and the size and part of the shape of the interference preventing member 20. However, since the characteristic configuration is common, one of these three types of module terminals 1 will be described in detail below.

18 to 20 are diagrams showing the module terminal according to the present embodiment, FIG. 18 is an exploded perspective view, FIG. 19 is a diagram for explaining the configuration of the terminal body, and FIG. 20 is an interference prevention member. It is a perspective view for demonstrating the structure of this.
As shown in FIG. 18, the module terminal 1 according to the present embodiment also includes a terminal body 10 and an interference prevention member 20.

The terminal body 10 is formed by three-dimensionally bending a copper metal plate 110 having a strip shape as shown in FIG. 19 (a), and twisting the metal plate in the middle portion to extend in a perpendicular direction. A twisted portion 111 is provided.
Also in this embodiment, the terminal body 10 has one end portion bent at a substantially right angle to form a terminal portion 12 (see FIG. 19B). The terminal portion 12 has a substantially square flat plate shape, and fixes the electric wiring in cooperation with the male screw 5. A through hole 112 through which the male screw 5 is inserted is formed in the approximate center of the terminal portion 12.
Further, a certain region from the base of the terminal portion 12 is a flat mounting region 13, and the interference preventing member 20 is mounted on the mounting region 13.
Moreover, in this embodiment, the appropriate place of the terminal main body 10 is bent and formed into a step shape (see FIG. 17), and the flat surface 114 continuous from the step portions 113 is the laminated battery cell 2 shown in FIG. The electrode terminal 2a or 2b is electrically connected.

The interference prevention member 20 is a resin molded product using an insulating synthetic resin material, and has a female screw portion 120 facing the wall portion 22 as shown in FIGS. 18 and 20. The female screw portion 120 includes a female screw holding portion 121 formed at a portion facing the wall portion 22, and a nut member 122 attached to the female screw holding portion 121.
That is, the female screw holding portion 121 has a front wall portion 123 that faces the wall portion 22, and an inner shape corresponding to the outer shape of the nut member (that is, a hexagonal shape) is fitted in the center portion of the front wall portion 123. A mating recess 124 is formed. The nut member 122 is press-fitted and attached to the fitting recess 124 (see FIG. 18). Further, a through hole 125 is formed in the front wall portion 123 at a portion facing the screw hole of the nut member 122 press-fitted into the fitting recess 124 in this way.
The front end of the male screw 5 screwed into the nut member 122 and penetrating through the through hole 125 faces the wall portion 22.

The female screw holding portion 121 and the wall portion 22 are connected to each other at both left and right edges by a pair of side walls 126 and 126, respectively. And the latching claws 127 and 127 are extended from the edge of these side walls 126 and 126 (lower end edge of FIG. 18). These locking claws 127 and 127 are opposed to each other, and the interval thereof corresponds to the width of the mounting region 13 in the terminal body 10. These locking claws 127 and 127 are elastically engaged with both end edges of the mounting region 13, respectively, and the interference preventing member 20 is mounted on the flat surface of the mounting region 13 (see FIG. 20B). .
In the present embodiment, the bottom portion of the interference preventing member 20 including the edges of the side walls 126 and 126 from which the locking claws 127 and 127 extend constitutes an attachment portion to the terminal body 10.

  When the interference preventing member 20 is mounted on the mounting region 13 of the terminal body 10, the terminal portion 12 of the terminal body 10 is disposed to face the front wall portion 123 of the female screw holding portion 121. And the through-hole 112 formed in the terminal part 12 opposes the screw hole of the nut member 122.

  A peripheral wall portion 128 extends forward from the outer peripheral edge of the front wall portion 123 formed on the female screw holding portion 121, and the peripheral wall portion 128 surrounds the terminal portion 12 arranged to face the front wall portion 123. It is configured to cover. The peripheral wall portion 128 extends from both side edges and the upper edge of the front wall portion 123, and the vicinity of the lower edge is a notch portion 129 in which the peripheral wall portion 128 is not formed.

  The interference preventing member 20 is assembled to the terminal body 10 such that the terminal portion 12 of the terminal body 10 is guided from the notch 129 and guided along the front wall portion 123. In the process, the locking claws 127 and 127 are elastically engaged with the mounting region 13 of the terminal body 10 in an appropriate posture.

As shown in FIG. 20, the interference preventing member 20 has a positioning pin 130 on the bottom surface constituting the mounting portion. On the other hand, the terminal body 10 is provided with a positioning hole 131 in the mounting region 13, and the interference preventing member 20 is positioned and fixed with respect to the terminal body 10 by inserting a positioning pin 130 into the positioning hole 131. . The positioning pin 130 is formed in a pyramid shape that tapers from the root toward the tip, and is set to a dimension that keeps the top of each side in contact with the inner periphery of the positioning hole 131 at the root.
Here, the positioning pin 130 is also inserted into the positioning hole 131 in an appropriate posture in the process of assembling the interference preventing member 20 by introducing the terminal portion 12 of the terminal body 10 from the notch portion 129 as described above. It has a configuration.

Similarly to the first embodiment, the module terminal 1 of the present embodiment is also an extension in which the terminal portion 12 of the terminal body 10 and the interference prevention member 20 are formed on the lid 32 of the casing 30 as shown in FIG. It is inserted and arranged in the portion 33.
At this time, the outer peripheral edge and the side wall 126 of the female screw holding portion 121 formed on the interference prevention member 20 abut against the inner peripheral surface of the extension portion 33 with respect to the rotational moment received from the male screw, and the terminal portion 12 and the interference prevention member. Regulates 20 turns. Therefore, there is no possibility that the terminal main body 10 moves and the electrical connection state between the electrode terminals 2a or 2b of the laminated battery cell 2 is broken.
Further, since the peripheral wall portion 128 formed on the female screw holding portion 121 of the interference prevention member 20 covers the periphery of the terminal portion 12 of the terminal main body 10 as described above, the terminal portion 12 is included in the extension portion 33 of the lid body 32. There is no contact with the peripheral surface, and therefore metal hitting can be prevented from occurring.
In the module terminal 1 of this embodiment, the interference preventing member 20 is interposed between the tip of the male screw 5 and the assembled battery 3 as in the first embodiment. For this reason, since the front-end | tip of the screwed male screw 5 contacts the interference prevention member 20, interference with the main body of the laminated battery cell 2, its terminal, etc. can be avoided.

  The interference preventing member 20 of the second embodiment and the related structure can be applied to the module terminal 1 of the first embodiment described above, and conversely, the first embodiment is applied to the module terminal 1 of the second embodiment. The interference prevention member 20 and its related structure can also be applied.

1: Module terminal, 2: Stacked battery cell, 2a: Bag-shaped outer package, 2b: Positive electrode terminal, 2c: Negative electrode terminal, 3: Battery assembly, 3a: Conductive member, 4: Module, 5: Male screw, 6: Bus bar 6a: conductive plate,
10: terminal body, 11: other end portion, 12: terminal portion, 13: mounting region, 14: bulging portion, 15: female screw portion, 16: bent portion,
20: Interference prevention member, 21: Attachment portion, 21a: Base portion, 21b: Attachment piece, 22: Wall portion, 23: Rib, 24: Support wall, 25: Elastic piece, 26: Side wall, 27: Removal prevention claw, 28 : Arm,
30: casing, 31: cylinder, 32: lid, 33: extension part, 34: insertion hole,
100: secondary battery,
110: Metal plate, 111: Twisted part, 112: Through hole, 113: Step part, 114: Flat surface,
120: female screw part, 121: female screw holding part, 122: nut member, 123: front wall part, 124: fitting recess, 125: through hole, 126: side wall, 127: locking claw, 128: peripheral wall part, 129: Notch, 130: positioning pin, 131: positioning hole

Claims (13)

A module terminal incorporated as a terminal for inputting and outputting power to a module incorporating a battery pack formed by connecting a plurality of stacked battery cells,
A terminal body made of a metal plate, having a terminal portion for fixing electric wiring in cooperation with the male screw, and electrically connected to the electrode of the assembled battery;
Including an interference preventing member having insulating properties attached to the terminal body,
The terminal main body or the interference prevention member has a female screw portion into which the male screw is screwed, and the male screw screwed into the female screw portion is arranged at a position where the tip faces the end face of the assembled battery. ,
The interference preventing member is disposed between a tip of a male screw screwed into the female screw portion and an end surface of the assembled battery, and is attached to the terminal body in a detachable manner, and the female screw portion. A module terminal comprising: a wall portion disposed between a front end of a screwed male screw and an end surface of the assembled battery. 2. The module terminal according to claim 1, wherein the terminal main body has a configuration in which one end portion forms the terminal portion and the terminal portion has the female screw portion. The terminal body is formed with a flat mounting region,
The attachment portion of the interference preventing member is disposed in parallel with a flat base and a bottom surface of the base at a predetermined interval, and is connected to the base at one side edge and can be flexibly elastically bent. A clip-shaped mounting piece, and
3. The module terminal according to claim 2, wherein the interference preventing member is slidably mounted on the mounting region with the mounting portion of the terminal body sandwiched between the base and the mounting piece. The mounting portion of the interference preventing member is fitted into the mounting region of the terminal body from the other side edge of the base and the mounting piece, and the mounting region of the terminal body is mounted on the other side edge of the base and the mounting piece. 4. The module terminal according to claim 3, further comprising an anti-disengagement claw that engages with an edge of the module. The terminal body is formed with a bent end position near the other end in the mounting region, and the bent portion constitutes a stopper that regulates a sliding range of the interference preventing member. Item 3 or 4 module terminal. 6. The module according to claim 2, further comprising: an urging unit that urges the interference preventing member toward a terminal portion in which the female thread portion of the terminal body is formed. Terminal. 7. The terminal body according to claim 2, wherein a cylindrical bulging portion is drawn from the terminal portion, and the female screw portion is formed on an inner peripheral surface of the bulging portion. The module terminal according to one item. The module terminal according to claim 1, wherein the interference prevention member has the female screw portion facing the wall portion. 9. The module terminal according to claim 8, wherein the female screw portion includes a female screw holding portion formed at a portion facing the wall portion, and a nut member attached to the female screw holding portion. The module includes a casing that houses the assembled battery, and the casing is formed with a rectangular tube-shaped extending portion,
The female screw holding portion is inserted and disposed in the rectangular tube-like extension portion, and is configured to abut against the inner peripheral surface of the extension portion with respect to a rotational moment received from the male screw and restrict the accompanying rotation. The module terminal according to claim 9. The interference prevention member has side walls on both the left and right side surfaces, and each side wall is connected to the wall portion and the female screw holding portion, and is inserted and arranged in the rectangular tube-shaped extension portion. 11. The module terminal according to claim 10, wherein the module terminal is configured to abut against an inner peripheral surface of the extension portion with respect to a rotational moment received from the male screw to restrict the accompanying rotation. The module terminal according to claim 10 or 11, further comprising the following configurations (a) to (e).
(A) The terminal main body has one end portion forming the terminal portion, and a mounting region for the interference preventing member is formed in a portion other than the one end portion.
(B) The female screw holding portion has a front wall portion disposed opposite to the terminal portion of the terminal body, and a peripheral wall portion covering the periphery of the terminal portion, and the front wall portion and the peripheral wall portion are connected to each other. Yes.
(C) The interference prevention member has a locking claw that elastically engages with the mounting region of the terminal body at the attachment portion,
The female screw holding part is formed with a notch part for introducing and guiding the terminal part of the terminal main body to a position opposed to the front wall part in a part of the peripheral wall part,
In the process of introducing the terminal portion of the terminal main body from the notch and guiding the terminal portion to a position opposite to the front wall portion, the locking claw is elastically engaged with the mounting region of the terminal main body. It has a configuration.
(D) the terminal body has a positioning hole in the mounting region;
The interference preventing member has a positioning pin inserted into the positioning hole,
The positioning pin is inserted into the positioning hole in the process of introducing the terminal portion of the terminal main body from the notch portion and guiding the terminal portion to the facing position of the front wall portion.
(E) The positioning pin is formed in a pyramid shape that tapers from the root toward the tip, and the top of each side at the root is set to a dimension that maintains a contact state with the inner periphery of the positioning hole. is there. The terminal body is formed by three-dimensionally bending a band-shaped metal plate, and has a twisted portion that is caused by twisting the metal plate and extending in a perpendicular direction at the intermediate portion. The module terminal according to claim 1, wherein the module terminal is a module terminal.

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