JP2013098141A - Method for installing bracket in battery pack and assembly jig - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for installing a battery pack bracket capable of easily positioning the bracket on an undersurface of a stack assembly, and an assembly jig using for the installation method.SOLUTION: An upper side bracket 10 is positioned and arranged at a prescribed position in one end part of an undersurface 20a of a stack assembly 20, a lower side bracket 11 is held in an assembly jig 1, and the assembly jig 1 is positioned and held relative to the stack assembly 20. Thereby, the lower side bracket 11 is positioned and arranged at a prescribed position in the other end part of the undersurface 20a of the stack assembly 20, the assembly jig 1 is placed to abut on a surface opposite to a surface where the stack assemble 20 is located, and a bracket 9 (each of the bracket 10 and 11) is coupled with the undersurface 20a of the stack assembly 20.

Description

  The present invention relates to a method for assembling a bracket used for fixing a lower case in a battery pack, and a technique for an assembling jig therefor.

  A battery pack mounted on a vehicle such as a hybrid vehicle or an electric vehicle includes an assembled battery (stack) that secures a predetermined capacity by connecting a plurality of unit cells (battery modules) made of one or a plurality of single cells. The stack is sandwiched between a pair of end plates to constitute an assembly (hereinafter referred to as a stack assembly). In general, the stack assembly or the like is accommodated in a battery case to constitute a battery pack. The battery case includes a lower case on which the stack assembly is placed and an upper case that covers the stack assembly. The stack assembly is fastened to the lower case.

In the operation of fastening the stack assembly and the lower case, the stack assembly faces the side (the direction facing the worker) of the lower surface of the stack assembly where the lower case is fastened in order to optimize the working posture of the worker. Therefore, it is preferable to arrange it in a state where it is appropriately tilted forward at an angle at which it is easy to work.
Then, after positioning the lower case on the side surface (lower surface) facing the side of the stack assembly and aligning the bolt holes of the lower case and the stack assembly, the bolts are inserted from the lower case side toward the stack assembly side. Therefore, both members are fastened.
When performing this operation, a device for maintaining the positioning state of the stack assembly and the lower case (hereinafter referred to as a positioning device) is generally used.

However, when the lower case becomes larger, it becomes difficult for the operator to lift the lower case, and it is necessary to increase the capability (clamping force) of the positioning device.
For this reason, in order to cope with a larger lower case, a technology has been developed in which an intermediate member (bracket) is provided between the stack assembly and the lower case, and the stack assembly and the lower case are fastened via the bracket. The technique is disclosed in Patent Document 1 shown below and is publicly known.

JP 2006-185815 A

  However, in the battery pack according to the related art disclosed in Patent Literature 1, the bracket is assembled in such a manner that the bracket is attached to two side surfaces of the stack assembly. In this case, in order to attach a pair of brackets, it is necessary to perform the assembling work from two directions (both side surfaces).

  As described above, the technique disclosed in Patent Document 1 cannot be operated only from the lower surface direction with the lower surface fastening the lower case in the stack assembly directed to the side surface (direction facing the operator). The assembly work has not been realized.

Here, in the aspect in which the lower surface of the stack assembly is held sideways (direction facing the operator), it is difficult to hold the bracket while positioning the bracket on the lower surface of the stack assembly. In particular, when the stack assembly is enlarged, the bracket is also enlarged accordingly, so that it is more difficult to hold while positioning.
For this reason, a means for maintaining the state in which the bracket is positioned with respect to the stack assembly is required. However, the positioning device used for positioning the lower case is too large to be used for the bracket. Since the shape of the lower case is different, it is difficult to divert the conventional positioning device as it is for the bracket.

  The present invention has been made in view of such a problem of the present situation, and it is possible to easily position the bracket on the lower surface of the stack assembly in order to further facilitate the assembly work of the bracket to the stack assembly. It is an object of the present invention to provide an assembly method for the battery pack bracket and an assembly jig used for the assembly method.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

  That is, in Claim 1, a bracket fixed between the stack assembly and the battery case is attached to a stack assembly having an assembled battery formed by connecting a plurality of unit cells made of one or a plurality of unit cells. A method of assembling, wherein the first bracket is positioned and arranged at a predetermined position on one end of the lower surface of the stack assembly, the second bracket is held with respect to a jig, and the stack assembly is By positioning and holding the jig, the second bracket is positioned and arranged at a predetermined position on the other end of the lower surface of the stack assembly, and the jig is placed on the stack of the first bracket. The first and second brackets are placed on the lower surface of the stack assembly in contact with the surface opposite to the surface where the assembly is located. It is intended to sintering.

  According to a second aspect of the present invention, the jig includes holding means constituted by a magnet, and the jig is positioned and held with respect to the stack assembly by magnetizing the stack assembly with the holding means. It is something to be made.

  According to a third aspect of the present invention, the jig includes a positioning pin for holding the second bracket, and the second pin is inserted into the hole formed in the second bracket, whereby the second The bracket is positioned and held with respect to the jig.

  In Claim 4, the assembly for assembling the bracket fixed between the said stack assembly and a battery case to the stack assembly which has the assembled battery formed by connecting the unit battery which consists of one or several single cells. A holding jig that is a means that can be fixed to a predetermined position of the stack assembly, and the holding means is positioned and fixed at a predetermined position of the stack assembly. A first bracket positioned and disposed at one end of the lower surface; a contact portion that is a portion that contacts a surface opposite to a surface on which the stack assembly is located; and a second bracket at the other end of the lower surface of the stack assembly. And a positioning part that is a part for holding the second bracket while positioning the second bracket.

  According to a fifth aspect of the present invention, the holding means is composed of a magnet, and is fixed to the stack assembly by magnetizing a predetermined position of the stack assembly.

  According to a sixth aspect of the present invention, the positioning portion is constituted by a positioning pin having a ball plunger, and holds the second bracket by being inserted through a hole formed in the second bracket.

  As effects of the present invention, the following effects can be obtained.

According to the first aspect, the bracket can be easily assembled to the lower surface of the stack assembly which is difficult to hold while positioning the bracket.
In particular, since the assembly jig positions and holds the second bracket on the stack assembly and abuts on the first bracket, the first bracket can also be stably held.

  According to the second aspect, the assembling jig can be easily held with respect to the stack assembly.

  According to the third aspect, the bracket can be easily held with respect to the assembling jig.

According to the fourth aspect, the posture of the bracket can be easily held on the lower surface of the stack assembly, which is difficult to hold while positioning the bracket. Thereby, a bracket can be assembled | attached easily.
In particular, the first bracket can be stably held by positioning and holding the second bracket on the stack assembly by the positioning portion and by contacting the first bracket by the contact portion.

  According to the fifth aspect, the assembling jig can be easily held with respect to the stack assembly.

  According to the sixth aspect, the bracket can be easily held with respect to the assembling jig.

1 is a schematic view showing a stack assembly to which a bracket assembly method according to an embodiment of the present invention is applied; (a) a schematic perspective view showing an overall configuration of the stack assembly; and (b) a perspective view showing a stack assembly arranged in an assembled state. Pattern diagram. The perspective schematic diagram which shows the stack assembly and bracket concerning application of the assembly | attachment method of the bracket which concerns on one Embodiment of this invention. The schematic diagram which shows the whole structure of the assembly | attachment jig | tool which concerns on one Embodiment of this invention, (a) The schematic diagram seen from the surface side, (b) The schematic diagram seen from the back surface side. The perspective schematic diagram which shows the whole structure of the assembly | attachment jig | tool which concerns on one Embodiment of this invention. The schematic diagram which shows the positioning state of the lower bracket by a positioning pin. The schematic diagram which shows the holding state of the jig | tool for an assembly | attachment with respect to the magnetic adhesion part by a holding means. The schematic diagram which shows the arrangement | positioning state of the upper side bracket with respect to a stack assembly, (a) A schematic perspective view, (b) The detailed view of the A section in Fig.7 (a). The perspective schematic diagram which shows the holding state of the lower bracket in the jig | tool for an assembly | attachment. The perspective view schematic diagram which shows the positioning state of the jig | tool for an assembly | attachment with respect to a stack assembly, and a lower bracket. The schematic diagram which shows the arrangement | positioning state of the lower bracket with respect to a stack assembly, (a) The detailed view of the B section in FIG. 9 which shows the positioning state by a dowel, (b) The detailed drawing of the C section in FIG. 9 which shows the positioning state by a nail | claw. The perspective schematic diagram which shows the holding | maintenance state of the bracket by the assembly | attachment jig | tool with respect to a stack assembly. FIG. 12 is a detailed view of a portion D in FIG. 11.

Next, embodiments of the invention will be described.
First, a stack assembly and a bracket to which a bracket assembly method using an assembly jig according to an embodiment of the present invention is applied will be described with reference to FIGS. 1 and 2.
1A, 1B, and 2, the stack assembly is held in a posture in which the lower surface thereof is directed to the side. Moreover, the direction shown by the arrow X described in FIGS. 1A and 1B and FIG. 2 indicates the upper side of the stack assembly and the bracket arranged in the assembled state (hereinafter the same).

  As shown in FIG. 1 (a), a stack assembly 20 to which a bracket assembly method using an assembly jig according to an embodiment of the present invention is applied is a unit battery 21 or 21 composed of one or a plurality of unit cells. Are stacked, and a pair of end plates 22 and 23 are disposed adjacent to the unit cells 21 and 21 located at both ends in the stacking direction.

The end plates 22, 23 are connected by connecting members 24, 24... By changing the screwing positions of the end plates 22, 23 with respect to the connecting members 24, 24. The distance between 22 and 23 can be adjusted.
And the separation state of each end cell 22 * 23 is made small, and each unit battery 21 * 21 ... is clamped toward the lamination direction, and the lamination | stacking state of each unit battery 21 * 21 ... is hold | maintained. It is configured to do.

  In the assembled state of the bracket, as shown in FIG. 1B, the stack assembly 20 is held by the temporary fastening clamps 7 and 7 so that the lower surface 20a is held in a lateral direction. The worker performs the assembly work at a position facing the lower surface 20a.

A plurality of bolt holes 21a, 21a,... For assembling the bracket are formed in the upper portion (side 20b side) of the lower surface 20a in the assembled state, and the lower portion (side surface 20c side) in the assembled state of the lower surface 20a. Are formed with a plurality of bolt holes 21b, 21b,... For assembling the bracket.
A dowel 22a projects from the upper end of the surface corresponding to the lower surface 20a of the stack assembly 20 in one end plate 22, and the lower end of the surface corresponding to the lower surface 20a of the stack assembly 20 in the other end plate 23. The dowel 23a protrudes.
A claw 22b is formed at the lower surface side end of the surface corresponding to the side surface 20c of the stack assembly 20 in one end plate 22, and the lower surface of the surface corresponding to the side surface 20b of the stack assembly 20 in the other end plate 23. A claw 23b is formed at the side end.
In addition, it is preferable to hold the stack assembly 20 in the assembled state in such a manner that the stack assembly 20 is slightly tilted forward to the worker side in consideration of the workability of the worker.

  As shown in FIG. 2, the bracket 9 to which the bracket assembly method according to the embodiment of the present invention is applied is an upper bracket 10 that is a bracket disposed on the upper surface (side 20b side) of the lower surface 20a in the assembled state. And the lower bracket 11 that is a bracket disposed on the lower portion (side surface 20c side) of the lower surface 20a in the assembled state.

  Further, the upper bracket 10 is formed with holes 10a, 10a,... Corresponding to a plurality of bolt holes 21a, 21a,. .. Corresponding to the plurality of bolt holes 21b, 21b,... Arranged below the lower surface 20a.

Further, the upper bracket 10 is formed with a dowel hole 10c corresponding to the dowel 22a and a hook 10d corresponding to the claw 23b, and the lower bracket 11 has a dowel hole 11c corresponding to the dowel 23a, A hook 11d corresponding to the claw 22b is formed.
Further, the lower bracket 11 is formed with positioning holes 11e and 11e which are portions to be locked by the assembling jig.

  In the upper bracket 10, the dowels 22a are inserted into the dowel holes 10c, and the hooks 10d are engaged with the claws 23b so that the holes 10a, 10a,... Correspond to the bolt holes 21a, 21a,. Thus, it can be positioned at a predetermined position above the lower surface 20a.

  Similarly, in the lower bracket 11, the hooks 11d are engaged with the claws 22b while the dowels 23a are inserted into the dowel holes 11c, so that the holes 11a, 11a,. Can be positioned at a predetermined position below the lower surface 20a.

The upper bracket 10 is in an unstable arrangement state simply by engaging the hook 10d with the claw 23b while inserting the dowel 22a through the dowel hole 10c, and may easily tilt forward. .
Further, the lower bracket 11 is also in an unstable arrangement state by simply engaging the hook 11d with the claw 22b while inserting the dowel 23a through the dowel hole 11c, and may easily fall off.

  For this reason, in the bracket assembling method according to the present invention, each bracket disposed at a predetermined position (upper and lower) with respect to the lower surface 20a of the stack assembly 20 held with the lower surface 20a facing sideways. It is set as the structure using the jig | tool (assembly jig | tool) which can hold | maintain 10 * 11 easily.

Next, the overall configuration of the assembly jig used in the bracket assembly method according to the embodiment of the present invention will be described with reference to FIGS.
Note that the direction of the arrow X described in FIGS. 3A and 3B and FIG. 4 indicates the upward direction in the usage state of the assembly jig, and coincides with the upward direction in the assembled state of the stack assembly 20.

  An assembling jig 1 according to an embodiment of the present invention is used in a bracket assembling method according to an embodiment of the present invention. As shown in FIGS. 3A and 3B and FIG. 2a, bracket holding portions 2b and 2b, plate 2 having bracket holding portions 2c and 2c, holding means 3 and 3, positioning portions 4 and 4, handle portion 6 and the like.

In the following description, the surface on the side provided with the handle portion 6 shown in FIG. 3 (a) is defined as the surface 1a of the assembling jig 1, and FIG. 3 (b). The surface opposite to the front surface 1a shown in FIG.
In the state where the assembling jig 1 is in use, the operator grasps the handle 6 and makes the assembling jig 1 face the back surface 1b stack assembly 20 with the front surface 1a facing the operator. It is configured to use.

The plate 2 is a member that forms the skeleton of the assembling jig 1, and includes a base 2a, bracket pressing portions 2b and 2b (corresponding to contact portions in claims), bracket holding portions 2c and 2c, and the like. .
The plate 2 is made of a material such as a resin plate in order to reduce the weight so that the operator can easily handle it while ensuring the rigidity necessary to press the brackets 10 and 11. Is preferred.

The bracket pressing portions 2b and 2b are portions for pressing the upper bracket 10 arranged on the upper portion of the stack assembly 20, and project from the base portion 2a to the upper side in the usage state of the assembly jig 1 as a pair of left and right projections. Has been.
Further, the bracket pressing portions 2b and 2b have notches 2d and 2b at positions corresponding to the positions of the holes 10a and 10a formed in the upper bracket 10 when the upper bracket 10 is pressed. 2d is formed so that the holes 10a, 10a,... Are not blocked by the bracket pressing portions 2b, 2b.

The bracket holding portions 2c and 2c are portions for holding the lower bracket 11 at the lower portion of the stack assembly 20, and project from the base portion 2a to the lower side in the usage state of the assembly jig 1 as a pair of left and right. Has been.
The bracket holding portions 2c and 2c are provided with positioning portions 4 and 4 for holding the lower bracket 11 by the bracket holding portions 2c and 2c so as to protrude from the bracket holding portions 2c and 2c on the back surface 1b side. Yes.

As shown in FIG. 5, the positioning part 4 is a part for positioning the lower bracket 11 with respect to the assembling jig 1, and includes a base part 4a fixed to the bracket holding part 2c by a bolt, and the base part. Positioning pins 4b and the like protruding from 4a are provided. The positioning pin 4b protrudes to the back surface 1b side of the assembly jig 1.
Then, as shown in FIG. 5, by inserting the positioning pins 4b and 4b into the positioning holes 11e and 11e of the lower bracket 11, the lower bracket 11 can be held while being positioned in the bracket holding portions 2c and 2c. It is configured as possible.

A ball plunger 5 is provided on the outer peripheral surface of the positioning pin 4b.
The ball plunger 5 is provided with a substantially hemispherical locking portion 5a that is a portion protruding from the outer peripheral surface of the positioning pin 4b in a steady state, and the protruding portion of the locking portion 5a in the positioning pin 4b The outer dimension is larger than the inner diameter dimension of the positioning hole 11 e formed in the lower bracket 11.

Further, an elastic member 5b made of a spring or the like is interposed in the locking portion 5a inside the positioning pin 4b. For this reason, the latching | locking part 5a is restored to the state which protrudes from the outer peripheral surface of the positioning pin 4b, while immersing inside the positioning pin 4b by being pressed, and releasing a press.
In the state where the locking portion 5a is immersed in the positioning pin 4b, the outer dimension of the positioning pin 4b at the portion where the locking portion 5a exists is equal to or smaller than the inner diameter of the hole 11a formed in the lower bracket 11. It becomes the composition which becomes.

  With such a configuration, when the positioning pin 4b is inserted from the front surface side to the back surface side with respect to the holes 11a and 11a formed in the lower bracket 11, the locking portion 5a is inserted into the holes 11a and 11a. Since it is pressed by the peripheral surface and immerses into the positioning pin 4b, the positioning pin 4b can be inserted into the hole 11a.

Moreover, when the latching | locking part 5a passes through each hole 11a * 11a and arrives at the back surface side of the lower bracket 11, the latching | locking part 5a is restored | restored to the state which protrudes from the outer peripheral surface of the positioning pin 4b.
And in the site | part with the latching | locking part 5a of the positioning pin 4b, since the external dimension of the positioning pin 4b becomes large compared with the internal diameter dimension of the hole 11a, it can latch the lower bracket 11 by the latching | locking part 5a. It is possible to prevent the lower bracket 11 from easily coming off the positioning pins 4b and 4b.
With such a configuration, the lower bracket 11 can be reliably held in the assembling jig 1 (more specifically, the bracket holding portions 2c and 2c) while being easily detachable.

  Further, the bracket holding portions 2c and 2c are notched at positions corresponding to the positions of the holes 11a, 11a,... Formed in the lower bracket 11 in a state where the lower bracket 11 is held. 2d and 2d are formed, so that the holes 11a, 11a,... Are not blocked by the bracket holding portions 2c and 2c.

The holding means 3 is a part for holding the assembly jig 1 while being positioned with respect to the stack assembly 20, and a pair of magnets 3 a protruding from the left and right ends of the base 2 a on the back surface 1 b side. I have.
As shown in FIG. 6, the magnet 3 a is magnetically attached to a magnetic attachment portion 7 a made of a magnetic material formed in a part of a temporary clamp 7 (see FIG. 1B) for holding the stack assembly 20. Thus, the assembly jig 1 can be held while being positioned with respect to the stack assembly 20.

In addition, in this embodiment, although the magnet 3a which has a substantially hexagonal column shape is illustrated, the form of the magnet with which the assembly | attachment jig | tool which concerns on this invention is provided is not limited to this.
In this embodiment, the magnetized portion 7a is made of a magnetic material, and the assembly jig 1 is provided with a magnet 3a having magnetic force. However, a magnet, an electromagnet, or the like is disposed on the temporary clamp 7 side. It is also possible to adopt a configuration (only the magnetic body is disposed on the assembly jig side).

The magnet 3a is fixed to the plate 2 via an adjuster 3b that can adjust the protruding length of the bolt. For this reason, the magnet 3 a can adjust the separation distance from the plate 2.
Then, by adjusting the distance between the magnet 3a and the plate 2 with the adjuster 3b, the bracket holding portions 2b and 2b are aligned with the upper bracket 10, and the lower bracket 11 held by the bracket holding portions 2c and 2c. The degree of pressing against the stack assembly 20 can be adjusted.

Next, a method for assembling the bracket 9 using the assembling jig 1 according to one embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 7A, in the method of assembling the bracket 9 using the assembling jig 1, first, the stack assembly 20 held in a predetermined posture by the temporary fastening clamps 7 and 7 The upper bracket 10 is arranged and prepared at a predetermined position on the upper surface of the lower surface 20a.

At this time, the upper bracket 10 inserts the dowel 22a of the end plate 22 into the dowel hole 10c and engages the hook 10d with the claw 23b of the end plate 23 as shown in FIG. It is trying to position in the position of.
.. Are formed in the upper bracket 10 at positions corresponding to the bolt holes 21a, 21a,... Formed in the stack assembly 20 (substantially coincide with each other in the line of sight of the operator). Position).

  On the other hand, as shown in FIG. 8, the assembling jig 1 has the positioning pins 4b and 4b provided in the bracket holding portions 2c and 2c inserted into the positioning holes 11e and 11e of the lower bracket 11, thereby Prepare with the side bracket 11 held.

  That is, in the method of assembling the bracket in the battery pack according to the embodiment of the present invention, the assembling jig 1 includes the positioning pins 4b and 4b for holding the lower bracket 11, and is formed on the lower bracket 11. The lower bracket 11 is positioned and held with respect to the assembly jig 1 by inserting the positioning pins 4b and 4b into the positioning holes 11e and 11e.

Further, in the assembling jig 1 used in the bracket assembling method according to the embodiment of the present invention, the positioning portion 4 is constituted by the positioning pin 4b having the ball plunger 5 and is formed in the lower bracket 11. The lower bracket 11 is held by being inserted through 11e and 11e.
With such a configuration, the bracket 9 (the upper bracket 10 and the lower bracket 11) can be easily held with respect to the assembly jig 1.

Next, as shown in FIGS. 9 and 10, the operator moves the assembly jig 1 along the lower surface 20 a while gripping the handle portion 6, so that the dowel hole 11 c of the lower bracket 11 is moved. The assembling jig 1 is arranged so that the hook 11d is engaged with the claw 22b of the end plate 22 while the dowel 23a of the end plate 23 is inserted therethrough.
Then, when the assembly jig 1 is arranged at a predetermined position using the dowel hole 11c and the hook 11d of the lower bracket 11, the magnets 3a and 3a provided in the assembly jig 1 are magnetized portions 7a. -It is arrange | positioned in the predetermined position magnetized by 7a, and the assembly jig 1 is hold | maintained in the state positioned with respect to the stack assembly 20. FIG.

At this time, as shown in FIGS. 11 and 12, since the bracket pressing portions 2b and 2b of the assembling jig 1 are brought into contact with the upper bracket 10, a stable arrangement state without tilting is maintained. .
Further, since the lower bracket 11 is held by the bracket holding portions 2c and 2c (positioning pins 4b and 4b) of the assembling jig 1, a stable arrangement state that does not easily fall off is held. .

  That is, in the method for assembling the bracket in the battery pack according to the embodiment of the present invention, the assembling jig 1 includes the holding means 3 constituted by magnets, and the stack assembly 20 is magnetically attached by the magnet 3a. The assembly jig 1 is positioned and held with respect to the stack assembly 20.

In the assembling jig 1 used in the bracket assembling method according to the embodiment of the present invention, the holding means 3 is constituted by a magnet 3a as a magnet, and a stacking position is obtained by magnetizing a predetermined position of the stack assembly 20. It is fixed to the assembly 20.
With such a configuration, the assembling jig 1 can be easily held with respect to the stack assembly 20.

When the bracket 9 (the upper bracket 10 and the lower bracket 11) is held by the assembly jig 1 with respect to the stack assembly 20, the worker releases his hand from the assembly jig 1. be able to.
And the bolts (not shown) with good workability in the state where the upper holes 10a, 10a,... And the lower holes 11a, 11a are arranged at the position facing the worker (nearly). Thus, the bracket 9 can be fastened to the stack assembly 20.

  That is, in the method for assembling the bracket in the battery pack according to one embodiment of the present invention, a stack assembly having an assembled battery formed by connecting a plurality of unit cells 21, 21. 20 is a method of assembling the bracket 9 fixed between the stack assembly 20 and the battery case, and the upper bracket 10 serving as the first bracket is placed at a predetermined position on one end of the lower surface 20a of the stack assembly 20. The lower assembly 11 as a second bracket is held with respect to the assembly jig 1, and the assembly jig 1 is positioned and held with respect to the stack assembly 20 to thereby hold the stack assembly. The lower bracket 11 is positioned and arranged at a predetermined position on the other end portion of the lower surface 20a of 20, The bracket 9 (the brackets 10 and 11) is fastened to the lower surface 20a of the stack assembly 20 with the assembly jig 1 in contact with the surface of the upper bracket 10 opposite to the surface where the stack assembly 20 is located. To do.

  The assembly jig 1 used in the bracket assembly method according to the embodiment of the present invention is an assembled battery formed by connecting a plurality of unit cells 21, 21. A holding means 3 which is a jig for assembling the bracket 9 fixed between the stack assembly 20 and the battery case to the stack assembly 20 having the holding means 3 and can be fixed to a predetermined position of the stack assembly 20; 3 is positioned and fixed at a predetermined position of the stack assembly 20, and is positioned and arranged at one end (the bolt holes 21a, 21a,...) Of the lower surface 20a of the stack assembly 20. A bracket that is a contact portion that is a portion that contacts the surface opposite to the surface on which the stack assembly 20 of the upper bracket 10 serving as the bracket is located. It is a part for positioning and holding the lower bracket 11 as the second bracket at the other end portions (the respective bolt holes 21a, 21a...) Of the even portions 2b and 2b and the lower surface 20a of the stack assembly 20. And positioning pins 4b and 4b which are positioning portions.

With such a configuration, the posture of the bracket 9 can be easily held on the lower surface 20a of the stack assembly 20 where it is difficult to hold the bracket 9 while positioning it. Thereby, the bracket 9 can be easily assembled.
In particular, the lower bracket 11 is positioned and held on the stack assembly 20 by the positioning pins 4b and 4b, and the upper bracket 10 is also stably held by contacting the upper bracket 10 by the bracket pressing portions 2b and 2b. be able to.

  In this embodiment, the case where the bracket 9 is assembled to the upper and lower portions of the lower surface 20a of the stack assembly 20 with the lower surface 20a facing sideways is illustrated. It is also possible to adopt a mode in which brackets are assembled to both ends of the lower surface 20a in the left-right direction with respect to the stack assembly 20 with the side 20a facing sideways.

DESCRIPTION OF SYMBOLS 1 Assembling jig 2 Plate 2b Bracket holding part 2c Bracket holding part 3 Holding means 3a Magnet 4 Positioning part 4b Positioning pin 5 Ball plunger 9 Bracket 10 Upper bracket (first bracket)
11 Lower bracket (second bracket)
11e Positioning hole 20 Stack assembly 20a Lower surface 21 Unit battery 21a Bolt hole 21b Bolt hole 22 End plate 22a Dowel 22b Claw 23 End plate 23a Dowel 23b Claw

Claims (6)

In a stack assembly having an assembled battery formed by connecting a plurality of unit cells composed of one or a plurality of unit cells,
An assembly method for assembling a bracket fixed between the stack assembly and the battery case,
The first bracket is positioned and arranged at a predetermined position on one end of the lower surface of the stack assembly,
The second bracket is held at a predetermined position on the other end of the lower surface of the stack assembly by holding the second bracket with respect to the jig and positioning and holding the jig with respect to the stack assembly. In a state where the jig is positioned, and the jig is brought into contact with the surface of the first bracket opposite to the surface on which the stack assembly is positioned, the first and second surfaces are placed on the lower surface of the stack assembly. Fasten the bracket of
Assembling method of the bracket characterized by this. The jig is
Comprising holding means composed of magnets,
By magnetizing the stack assembly with the holding means,
Positioning and holding the jig relative to the stack assembly;
The method for assembling the bracket according to claim 1. The jig is
A positioning pin for holding the second bracket;
By inserting the positioning pin through the hole formed in the second bracket,
Positioning and holding the second bracket with respect to the jig;
The method for assembling the bracket according to claim 1 or 2, wherein: An assembly jig for assembling a bracket fixed between a stack assembly and a battery case to a stack assembly having an assembled battery formed by connecting a plurality of unit cells each composed of one or a plurality of unit cells. ,
Holding means which is means capable of being fixed to a predetermined position of the stack assembly;
In the state where the holding means is positioned and fixed at a predetermined position of the stack assembly,
An abutting portion that is a portion that abuts on a surface opposite to the surface on which the stack assembly is positioned of the first bracket that is positioned and arranged at one end of the lower surface of the stack assembly;
A positioning part which is a part for positioning and holding the second bracket at the other end of the lower surface of the stack assembly;
Comprising
An assembly jig characterized by that. The holding means is
Composed of magnets,
By adhering to a predetermined position of the stack assembly, it is fixed to the stack assembly.
The assembling jig according to claim 4, wherein: The positioning part is
It consists of a locating pin with a ball plunger,
The second bracket is held by being inserted through a hole formed in the second bracket.
The assembling jig according to claim 4 or 5, wherein the assembling jig is provided.

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