JP2000323109A - Battery module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the holding characteristic of battery while improving the rigidity of the whole of a battery module, and to facilitate the handling of battery module by holding plural batteries integrally with each other while connecting them to each other so as to structure the battery module. SOLUTION: A battery module is formed of plural batteries 11-14 having electrodes 11a-14a, 11b-14b in both end surfaces thereof and arranged in parallel with each other so that one electrode is positioned in one flat surface and that the other electrode is positioned in the other flat surface, plate-like insulating bodies 21, 31 for covering one electrode of the plural batteries, and two holding members 20, 30 integrally formed with the insulating bodies and having at least one conductive part 25-27, 34, 36 for electrically communicating at least two electrodes of the one battery with each other. One and the other electrodes of each battery are fixed to one conductive part of one and the other holding member, and each battery is electrically connected in parallel or in series with/to each other through a conductive part, and all the batteries are integrally held by two holding members.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery module integrally holding a plurality of batteries arranged in parallel.

[0002]

2. Description of the Related Art Today, with the spread of information-related equipment such as personal computers, it is required to reduce the size and density of batteries, and high-performance batteries such as lithium ion secondary batteries have been put to practical use. . When these high-performance batteries are used, for example, as a power source for electric vehicles, a large capacity (instantaneous large output) is required. To satisfy this demand, dozens of batteries must be electrically connected. They must be connected and integrated. Under these circumstances, a battery module has been made by integrally holding a large number of batteries. In a first conventional method for electrically connecting a large number of batteries, a plurality of batteries are connected one by one with a fastening member, and a conductive nut is passed between the electrodes of each pair of adjacent batteries. Both ends were fixed to the electrodes with conductive bolts. still,
The integration of a plurality of batteries has been performed by housing the batteries in a box-shaped case or by bundling the batteries with a band-shaped member. On the other hand, in the second conventional method, a conductive nut is passed between the electrodes of each pair of adjacent batteries, and both ends thereof are fastened to the electrodes with conductive bolts, or each adjacent pair of batteries is connected. Each of the electrodes of the battery was resistance-welded to a conductive plate to form one module, and then several tens of modules were electrically connected with another conductive bolt and nut. The integration of the plurality of batteries in this case is the same as in the above-described conventional example.

[0003]

However, in the above-mentioned first method, it is necessary to connect the electrodes of the adjacent batteries by the nuts at the number of batteries minus one and at both ends of the bolts, which is inconvenient. In addition, work efficiency is poor. Also, in electrical connection by bolts and nuts, the contact resistance between the electrode and the bolts and nuts increases,
This is not desirable for a battery requiring a large output instantaneously, such as an electric vehicle. Furthermore, when a case is used to integrate a plurality of batteries, the weight and cost increase, and the outline of the plurality of batteries does not always match the shape of the housing space of the case. If there is a gap between the two, space is wasted.

[0004] Among the second methods, the method of connecting adjacent batteries with bolts and nuts and then connecting several tens of modules with bolts and nuts has the same problems as described above. On the other hand, in a method in which a conductive plate is resistance-welded between each pair of batteries to form one module, and then several tens of modules are connected by bolts and nuts, the number of connection points by bolts and nuts is reduced by half, and contact is made. There is no problem of resistance. However, there is a problem similar to the above-described conventional example regarding the integration of a plurality of batteries. SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems in the conventional example, and to improve the rigidity of a battery module while increasing the density of a battery, to enhance the retention of a battery, and to facilitate the handling of a battery module. It is a thing. In particular, the present invention aims at modularizing a large-capacity, relatively large-sized battery used for an electric vehicle power supply or the like.

[0005]

In order to achieve the above object, according to the present invention, a battery module includes a plurality of batteries having electrodes on both end surfaces and arranged in parallel with each other, and one of the plurality of batteries. Having a plate-shaped insulator covering the electrodes, and at least one conductive portion formed integrally with the insulator and electrically connecting at least two electrodes of one of the electrodes.
And two holding members. And one electrode of each battery is fixed to one conductive part of one holding member,
The other electrode is fixed to one conductive part of the other holding member, each battery is electrically connected in parallel or in series via the conductive part, and all the batteries are integrated by two holding members. Is held in. ADVANTAGE OF THE INVENTION According to this invention, the electrode of an adjacent battery can be connected easily, the rigidity of the whole battery module improves, the holding property of a battery increases, and also the handling of a battery module becomes easy.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention include the following aspects. 1) Battery The number of batteries can be any number of two or more, and the direction is not limited as long as they are parallel to each other. Therefore, both a serial connection and a parallel connection are possible (however, when there are two batteries, only a parallel connection is used). The batteries can be arranged one-dimensionally or two-dimensionally, but in the latter case, it is possible to increase the rigidity of the battery module by assembling them so that there is no gap between adjacent batteries (to bundle firewood), Desirable for easy handling. The diameter and length of the battery are not particularly limited,
The present invention is useful in batteries having a relatively elongated shape.
The sectional shape of the battery may be rectangular or elliptical in addition to circular.

2) Holding Member The insulating portions of a pair of holding members arranged on each end face of the battery are:
It can be formed of a synthetic resin plate or the like, and its shape can be rectangular or square, corresponding to the outline of a plurality of batteries. At least one conductive portion is provided on the insulating portion in accordance with the number of batteries to be connected, and electrodes (a positive electrode and a negative electrode,
(Positive electrodes or negative electrodes). Therefore, the shape of the conductive portion only needs to have a length and a width that can connect at least adjacent electrodes. If the arrangement direction of the batteries and the connection method of the electrodes are devised, the shape of the insulating portion and the conductive portion can be made the same for both holding members. When the insulating portion is a synthetic resin plate, the conductive portion can be integrally attached to the insulating portion during injection molding. However, the conductive portion can be attached to the insulating portion by bonding without using injection molding.

3) Fixing the conductive part to the electrode When fixing the conductive part of the holding member to the battery electrode (positive electrode or negative electrode), welding or brazing is desirable from the viewpoint of reducing the contact resistance, but the end face of the battery is preferably used. After the hole of the conductive portion is fitted in the male screw portion formed on the head of the electrode protruding from the nut, a nut can be screwed into the male screw portion.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings, taking a comparatively large battery used as a power source for an electric vehicle as an example. <First Embodiment> In the first embodiment, four batteries are arranged one-dimensionally (so that the axis of each battery is located in one plane) and connected in series, and the conductive portion of the holding member is connected. Is attached to the insulating part by integral molding, and the conductive part is joined to the electrode by welding. As shown in FIGS. 1 (a), (b) and (c), the battery module comprises four cylindrical batteries 11 , 12,1
3 and 14 and a pair of holding members 20 and 30 arranged on upper and lower end surfaces of the battery. More specifically, the first to fourth batteries 11 to 14 (all used in the present embodiment have a diameter of 33 mm and a height of 190 mm) are arranged in parallel with a slight gap, and the first batteries 11 and 14 Third battery 1
3 is a positive electrode 11 protruding from the upper end face and the lower end face, respectively.
a and 13a and negative electrodes 11b and 13b, and the second battery 12 and the fourth battery 14 have negative electrodes 12a and 14a and positive electrodes 12b and 14b on upper and lower end surfaces, respectively.
Here, the positive electrodes 11a, 12b,
13a and 14b and negative electrodes 11b, 12a, 13b and 1
4a have the same shape.

The upper holding member 20 (35 mm in width and 140 mm in length used in this embodiment) includes a holding plate (insulating portion) 21 made of synthetic resin and a holding plate 21 integrally attached thereto. Three conductive plates 25, 2 having substantially the same thickness
6 and 27 (the conductive plate 25 corresponds to the conductive portion). In the case of the present embodiment, the holding plate 21 is manufactured by injection molding of a resin material, and is an elongated rectangular thin plate that covers the four batteries 11 to 14. The holding plate 21 is formed with a long rectangular hole 21a at the center and short rectangular holes 21b and 21c at both sides, and rectangular plate-like conductive plates 25 to 27 are mounted in each rectangular hole.

The central conductive plate 25 has two round holes 25a,
25b, one round hole 26a, 27a is formed in each of the side conductive plates 26, 27, and each round hole 25a, 25
b, 26a, 27a are connected to the electrodes 11a of the batteries 11 to 14,
12a, 13a and 14a penetrate. The electrodes 11a to 14a are connected to the conductive joints 11c, 12c, 1
It is joined to the conductive plates 25 to 27 by 3c and 14c. Thereby, the conductive plates 26 and 27 are connected to the first battery 1.
The first positive electrode 11a and the negative electrode 14a of the fourth battery 14 are connected to external terminals 29a,
29b, and the conductive plate 25 is electrically connected to the second battery 12b.
And the positive electrode 13 of the third battery 13 are electrically connected.

The lower holding member 30 includes a holding plate 31 made of synthetic resin and two conductive plates 35 and 36 which are integrally attached to the holding plate 31. The holding plate 31 is also manufactured by injection molding of a resin material and has the same shape as the upper holding plate 21. The holding plate 31 has rectangular holes 31a, 31b having the same shape as the rectangular holes 21a at portions deviated on both sides from the center.
Are formed therein, and conductive plates (conductive portions) 35 and 36 having the same shape as the conductive plate 25 are mounted therein. Two round holes 35a, 35 are provided on both sides of both conductive plates 35, 36.
b, 36a, and 36b are formed, and the electrodes 11b to 14b of the batteries 11 to 14 penetrate through the respective round holes. Electrode 11
b to 14b and the conductive plates 35 and 36 are joined by conductive joints 11d to 14d on the upper surface of the conductive plate. Thus, the conductive plate 35 electrically connects the negative electrode 11b of the first battery 11 and the positive electrode 12b of the second battery 12, and the conductive plate 36 connects the negative electrode 13b of the third battery 13 and the fourth battery 14. The positive electrode 14b is electrically connected.

At the time of manufacturing the battery module, first, the conductive plates 25, 26, 27 and 35, 36 are attached to the holding plates 21, 3, respectively.
The holding members 20 and 30 are manufactured by integrally forming the holding members 20 and 30. That is, the conductive plates 25 to 27 are set in a cavity (not shown) of a mold at the time of injection molding of the upper holding plate 21, and the conductive materials 25 to 27 are held by injecting a resin material into the cavity. What is necessary is just to integrate with the board 21. Similarly, the conductive plates 35 and 36 are set in the mold cavity when the holding plate 31 is injection-molded. Next, the heads of the electrodes 11a to 14a and 11b to 14b protruding from the holding plates 21 and 31 by welding (resistance welding, laser welding or spot welding) or the like and the surfaces of the conductive plates 25 to 27 and 35 and 36. Between the annular joints 11d to 14d and 11e to 14e
To form electrodes 11a to 14a and 11b to 14b.
b is joined to the conductive plates 25 to 27 and 35, 36.

According to the battery module of this embodiment, the first
The conductive plates 25 to 27 and 35, 36 are
Since it is integrally attached to the holding plates 21 and 31 at the time of forming the mold 1, it is easy to attach the conductive plates 25 to 27 and 35 and 36 to the holding plates 21 and 31. Second, electrode 1
1a to 14a and 11b to 14b are connected to the conductive plates 25 to 2 by the joints 11c to 14c and 11d to 14d.
7 and 35, 36, the contact resistance can be reduced. Third, since a pair of holding members 20 and 30 are present at both ends of the batteries 11 to 14, in other words, both holding members 20, 30 are held by the four batteries 11 to 14, the rigidity of the battery module is improved. Is improved. In particular, the first
Between the positive electrode 11a of the battery 11 and the negative electrode 12a of the second battery 12, the positive electrode 12b of the second battery 12 and the negative electrode 1 of the third battery 13
3b, and between the positive electrode 13a of the third battery 13 and the negative electrode 14a of the fourth battery 14, portions that do not need to be electrically connected are also connected to each other by the holding members 21 and 31. The rigidity of the holding members 20 and 30 is improved. As a result, it is not necessary to house a plurality of batteries in a case for integration or bundle them with a band-shaped member as in the related art.

Fourth, although the cross-sectional shape of each of the batteries 11 to 14 is circular, the conductive plates 25 to 27 and 35, 36
Are attached to the holding plates 21 and 31 having shapes corresponding to the outlines of the four batteries 11 to 14, so that the battery module can be handled as a rectangular module, and handling is improved. Fifth, the upper holding member 2
0 conductive plate 25 and conductive plates 35, 3 of lower holding member 30.
6 is the same shape and can be shared. Upper holding member 2
The 0 conductive plates 26 and 27 can be shared in the same shape.

Note that, as shown in FIG.
a (11b) is made to protrude from the conductive plate 26 (35), and a male screw portion 11e is formed at the tip thereof, and the conductive plate 26 (35)
After covering the nut, the nut 38 can be screwed together. This makes it easy to attach and detach the conductive plate 26 and the like to and from the electrode 11a and the like. As shown in FIG. 2B, a small mounting hole 25c is formed in the conductive plate 25 (35), and the small diameter portion 12g of the head of the electrode 12a (12b) of the battery 12 is inserted into the mounting hole 25c. However, the joint 12c can be formed by plug welding on the surface of the conductive plate 25 or the like. Further, as shown in FIG. 2C, the electrodes 11a (11
b) does not project from the end face of the battery 11 and is flush with this,
This electrode may be joined to the conductive plate 26 (35).

<Second Embodiment> The second embodiment shown in FIGS. 3A and 3B is different from the first embodiment in that guide portions are provided on the holding plates 41 and 46 of the upper and lower holding members 40 and 45. 41a to 4
1d and 46a to 46d and peripheral wall portions 41e, 46e
Is formed, the conductive plates 43, 44 outside the upper holding member 40 are connected to the main bodies 43a, 44a and the external terminals 43b,
44b and the electrodes 11a to 14a and 11b to 14b of the batteries 11 to 14
5, 43, 44 and 35, 36 are not protruded from the mounting holes. Hereinafter, these different points will be mainly described, and substantially the same members and elements as those of the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

On the lower surface of the holding plate 41 of the upper holding member 40, four ring-shaped guide portions 41a to 41d and a square wall portion 41e are formed. Similarly, four guide portions 46a to 46d and a square wall portion 46e are formed on the upper surface of the holding plate 46 of the lower holding member 45. The guide portions 41a to 41d and 46a to 46d are fitted to the outer peripheral surface of the upper end or lower end of the batteries 11 to 14. The outer conductive plates 43, 44 of the upper holding member 41 have a constant width, an L-shaped cross section, and vertically extending portions 43b, 4b.
4b is an external terminal. Electrodes 11a to 14a and 11b to 14 on the upper and lower surfaces of batteries 11 to 14
b is inserted into the mounting holes of the conductive plates 25, 43, and 44 so as to be flush with the surface thereof, and the joints 11 around the mounting holes are formed.
They are joined by c to 14c and 11d to 14d.

As an effect unique to the second embodiment, since the guide portions 41a to 41d and 46a to 46d are formed, the holding of the batteries 11 to 14 by the holding members 40 and 45 becomes more reliable, and the square wall portions 41e and 41e are formed. The holding plates 41 and 46 are reinforced by 46e, and deformation can be prevented. Further, the external terminals 43b, 44 are simultaneously formed when the conductive plates 43, 44 are manufactured.
This is convenient because b is formed. The external terminal 4
Instead of 3b, 44b, as shown in FIG. 4, pins 48a, 48b may be provided on conductive plates 43, 44 on the side of holding plate 41 to serve as external terminals.

<Third Embodiment> In a third embodiment shown in FIGS. 5A and 5B, four batteries 11 to 14 are two-dimensionally arranged (for example, the axis of each battery is located at the vertex of a square). And the upper and lower two square holding members 5
0 and 55 are connected in series. That is, the first and third
Batteries 11 and 13 have positive electrodes 11a and 13a on the upper end surface side,
The second and fourth batteries 12 and 14 are oriented such that the negative electrodes 12a and 14a are on the upper end face side and the positive electrodes 12b and 14b are on the lower end face side such that the negative electrodes 11b and 13b are on the lower end face side. . The resin holding plates 51 and 56 of the upper and lower holding members 50 and 55 are formed in a square shape corresponding to the outline of the four batteries 11 to 14. The conductive plate 52 of the upper holding member 50 is relatively long, and is integrally mounted in a mounting hole 51a formed diagonally on the holding plate 51, and the negative electrode 12a of the second battery 12 and the third battery 13 with the positive electrode 13a. The two holding plates 57, 58 of the lower holding member 56 are relatively short, and mounting holes 56a, 56 formed parallel to each other along the sides of the holding plate 56.
b, and the first holding plate 57 is connected to the negative electrode 11 b of the first battery 11 and the positive electrode 12 of the second battery 12.
b, and the second holding plate 58 connects the negative electrode 13 b of the third battery 13 and the positive electrode 14 b of the fourth battery 14.

According to the third embodiment, the first battery 1
The first and second batteries 12 are adjacent to each other, and the third and fourth batteries 13 and 14 are adjacent to each other.
And third battery 13, and second battery 12 and fourth battery 1
4 are also adjacent to each other, and therefore have a large rigidity as a whole.

When four batteries are arranged two-dimensionally, the configuration shown in FIGS. 6A and 6B can be adopted. Here, the first and third batteries 11 and 13 are such that the positive and negative electrodes 11a and 13a are on the upper end face side and the negative electrodes 11b and 13b are on the lower end face side.
Numeral 14 denotes a negative electrode 12a, 14a having an upper end face side and a positive electrode 12b, 1
4b is disposed on the lower end surface side, and the upper holding member 6
0 of the second battery 1 with the conductive plate 62 attached to the holding plate 61 of the first battery.
The second negative electrode 12a is connected to the positive electrode 13a of the third battery 13, and the first negative electrode 12a is attached to the holding plate 66 of the lower holding member 65.
The negative electrode 11b of the first battery 11 and the positive electrode 12b of the second battery 12 are connected by the conductive plate 67, and the negative electrode 13b of the third battery 13 and the positive electrode of the fourth battery 14 are connected by the second conductive plate 68. 14
b.

<Fourth Embodiment> A fourth embodiment is shown in FIG. 7, in which two batteries 71, 72 are connected in parallel by two upper and lower holding members 73, 76. Both batteries 71, 7
2 are arranged in the same direction, the holding member 71 on the positive electrode side comprises a rectangular holding plate 72 and a conductive plate 73 buried thereon and connecting the positive electrodes, and the holding member 76 on the negative electrode side has a rectangular holding plate. It comprises a plate 77 and a conductive plate 78 fixed thereon and connecting the negative electrodes to each other.

<Fifth Embodiment> A fifth embodiment is shown in FIG.
3B, three batteries 81 to 83 are connected in series by two upper and lower holding members 84 and 87.
The first battery 81 and the third battery 83 have the positive electrode on the upper end face side and the negative electrode on the lower end face side, and the second battery 82 has the positive electrode on the upper end face side and the negative electrode on the lower end face side. The batteries are oriented so that each battery is located at the vertex of an equilateral triangle. The upper holding member 84 is provided with an equilateral triangular holding plate 8.
5 and a conductive plate 86 integrally mounted in the mounting hole
The conductive plate 86 connects the negative electrode of the second battery 82 and the positive electrode of the third battery 83. The lower holding member 87 is composed of an equilateral triangular holding plate 88 and a conductive plate 88 integrally attached to the mounting hole, and the conductive plate 88 is formed by the negative electrode of the first battery 81 and the second battery 82. Is connected to the positive electrode. Among the triangles, the equilateral triangle has a mechanically stable shape and can be modularized by arranging the cylindrical batteries in a close-packed state. In particular, when the number of cylindrical batteries is large (5 or more), the equilateral triangle is formed. It is desirable to use a unit. Next, such an embodiment will be described.

<Sixth Embodiment> In the sixth embodiment shown in FIGS. 9A and 9B, seven batteries 91 to 97 are arranged in triangular units and connected in series. In the seven batteries, the third battery 93 is located at the center of the circle, and the first, second, fourth,
Fifth, sixth and seventh batteries 91, 92, 94, 95, 9
6 and 97 are arranged at positions that divide the circle into six equal parts. As is clear from this, the first to third batteries 9
1 to 93; third to fifth batteries 93 to 95;
Third and seventh batteries 92, 93 and 97, third and fifth batteries
And the sixth batteries 93, 95 and 96 each form an equilateral triangle. First, third, fifth and seventh batteries 9
In 1, 93, 95 and 97, the positive electrode is on the upper end face side and the negative electrode is on the lower end face side, and in the second, fourth and sixth batteries 92, 94 and 96, the positive electrode is on the lower end face side and the negative electrode is on the upper end face side. Oriented.

The upper holding member 100 includes a hexagonal holding plate 101 and three conductive plates 1 attached to the mounting holes.
02 to 104, and the first conductive plate 102
The positive electrode of the battery 91 is connected to the negative electrode of the second battery 92, the second conductive plate 103 connects the positive electrode of the third battery 93 and the negative electrode of the fourth battery 94, and the third conductive plate 104 is connected to the fifth battery 95. And the negative electrode of the sixth battery 96 are connected. The lower holding member 105 is composed of a hexagonal holding plate 106 and three conductive plates 107 to 109 mounted in the mounting holes thereof,
The first conductive plate 107 has a positive electrode of the second battery 92 and a positive electrode of the third battery 93.
The second conductive plate 108 connects the positive electrode of the fourth battery 94 and the negative electrode of the fifth battery 95, and the third conductive plate 108
Reference numeral 9 connects the positive electrode of the sixth battery 96 and the negative electrode of the seventh battery 97. The upper and lower holding plates are formed by connecting a plurality of small equilateral triangular holding plates to form hexagonal holding plates 100 and 1 shown in FIG.
05 may be configured. According to this embodiment, a large number of batteries 91 to 97 can be compactly integrated with high rigidity.

<Application Example of Battery Module> 1) Series Connection FIG. 10A shows that the two battery modules 49 shown in FIG. Is a battery package connected by When connecting the battery modules 49 in this manner, the external terminals 48a and 48b each having a male screw formed at the end are used. Here, as shown in FIGS. 10B and 10C, an elongated rectangular connecting plate 1 which is conductive and has round holes 111a at both ends.
11 is connected to the external terminal 4 of the negative electrode of the first battery module 49.
8b and the positive external terminal 48 of the second battery module 49
a between the pins 48a and 4a in the round hole 111a.
After inserting 8b, the nut 112 is screwed. According to this battery package, only two battery modules 4
Only by connecting the connecting members 9 with the connecting member 110, a larger electric power can be obtained.

In addition, as the connecting plate, other than the connecting plate shown in FIG.
Various modifications as shown in (a) to (d) can be adopted. In the connecting plate 112 of FIG.
2a and a round hole 112b are formed. FIG. 11B
The connecting plate 113 is composed of two connecting pieces 113a and 113b each having a semicircular recess formed on the opposing surface. FIG.
In the connecting plate 114 of (c), two cut holes 114a of the same direction are formed. Then, in the connecting plate 115 of FIG.
a, 115b are formed. FIG. 3 (a)
The battery module having the flat type external terminals 43a and 43b shown in (b) can be connected by the various connecting members to form a battery package.

2) Parallel connection In the battery package shown in FIG. 12A, the negative external terminals 122 and 124 of the first and second battery modules 121 and 123 arranged in parallel are connected to each other by the connecting plate 126 and the nut 127. Are connected by a connecting member 125 composed of The external terminals of the positive electrodes of the first and second battery modules 121 and 123 are not shown. In the battery package shown in FIG. 12B, the positive external terminals 132, 1 of the two battery modules 131, 136 arranged in parallel.
37 are connected to each other by a first connecting member 141, and the negative external terminal 1
33 and 138 are connected to each other by a second connecting member 142. According to the battery package in which a plurality of battery modules are connected in parallel, the life of the battery is extended.
In FIGS. 12A and 12B, one or more battery modules can be further connected in parallel. In this case, the planar shape of the battery package should be made as close to a square as possible to improve the rigidity. It is desirable from the point of view. 3) Others The series connection shown in FIG. 10 and the parallel connection shown in FIG. 12 can be combined.

[Brief description of the drawings]

1A and 1B show a first embodiment of the present invention, wherein FIG. 1A is a front sectional view, FIG. 1B is a plan view, and FIG. 1C is a bottom view.

FIGS. 2A, 2B, and 2C are cross-sectional views of main parts showing different modifications of the first embodiment.

FIG. 3 shows a second embodiment of the present invention, wherein (a) is a perspective view,
(B) is a front sectional view.

FIG. 4 is a perspective view of a main part showing a modification of the second embodiment.

5A and 5B show a third embodiment of the present invention, wherein FIG. 5A is a plan view of a main part, and FIG. 5B is a bottom view of the main part.

6A and 6B show a modification of the third embodiment, in which FIG. 6A is a plan view of a main part, and FIG. 6B is a bottom view of the main part.

FIG. 7 is a front sectional view showing a fourth embodiment of the present invention.

8A and 8B show a fifth embodiment of the semi-invention, wherein FIG. 8A is a plan view of a main part and FIG. 8B is a bottom view of the main part.

9A and 9B show a sixth embodiment of the present invention, wherein FIG. 9A is a plan view of a main part, and FIG. 9B is a bottom view of the main part.

10A and 10B show a first application example of the present invention, wherein FIG. 10A is a perspective view, FIG. 10B is a sectional view of a main part, and FIG. 10C is a plan view of a main part.

11 (a), (b), (c) and (d) show FIG.
It is a principal part top view which shows the different modification of (b).

FIGS. 12 (a) and (b) are plan views showing separate second applied examples of the present invention.

[Explanation of symbols]

11, 12, 13, 14: batteries 11a, 11b, 12a, 12b, 13a, 13b, 1
4a, 14b: Electrodes 11c, 11d, 12c, 12d, 13c, 13d, 1
4c, 14d: Joint 20, 30: Holding member 21, 31: Holding plate (insulating portion) 25, 26, 27, 35, 36: Conductive plate

Claims (3)

[Claims] 1. A plurality of batteries having electrodes on both end surfaces and arranged in parallel with each other, a plate-shaped insulator covering one of the electrodes of the plurality of batteries, and one formed integrally with the insulator. At least two of said electrodes
Two holding members having at least one conductive portion electrically connecting the two electrodes, wherein one electrode of each of the batteries is fixed to one conductive portion of one of the holding members; The other electrode is fixed to the conductive part of one of the other holding members, each of the batteries is electrically connected in parallel or in series through the conductive part, and all the batteries are two of the two. A battery module, which is integrally held by a holding member. 2. The battery module according to claim 1, wherein the holding member has a guide that contacts an outer peripheral surface of the battery. 3. The battery module according to claim 1, wherein the holding member has a peripheral wall portion that covers an outer peripheral surface side of the battery group arranged in parallel.