JP2022176498A - Insulation ring and battery pack - Google Patents

Abstract

To implement an insulation ring that inhibits a structure and assembly work from being complicated to make it possible to obtain a battery pack having high safety.SOLUTION: An insulation ring 1 is attached to one end surface side of a battery pack including a group of cylindrical batteries provided in parallel. The insulation ring 1 includes an insulating base plate 10 and a wiring layer 20 provided thereon. The base plate 10 comprises: ring parts 11 corresponding to respective electrode surfaces of the group of cylindrical batteries; and coupling parts 12 coupling the ring parts. The wiring layer 20 is provided on the base plate 10's main surface 10b on a side opposite to a side to be made to face the group of cylindrical batteries. On the wiring layer 20, protection components such as a diode are mounted and connection of tabs to be connected to predetermined electrode surfaces of the group of cylindrical batteries and connection of lead wiring for connection between the predetermined electrode surfaces of the group of cylindrical batteries and for external connection of the battery pack is performed. Use of the insulation ring 1 inhibits a structure and assembly work from being complicated to make it possible to obtain the battery pack having high safety.SELECTED DRAWING: Figure 2

Description

The present invention relates to an insulating ring and an assembled battery.

A battery pack including a plurality of batteries is known. For example, with respect to an assembled battery, a first terminal having a cap portion covering a convex terminal of one battery in an adjacent battery group and a second terminal connected to a flat terminal of the other battery are interposed between the first terminal and the second terminal. A technique of arranging a ring-shaped PTC (Positive Temperature Coefficient) element through which a cap portion of a terminal is inserted is known.

In addition, a technique of interconnecting a plurality of batteries by means of connecting bases fitted on the anode side and the cathode side of a plurality of batteries, and a technique of integrally forming a terminal plate for electrically connecting the electrodes of each battery to the connecting bases are known. It is

In addition, a technique of connecting the other end sides of a plurality of storage elements having a positive electrode terminal and a negative electrode terminal on one end side with an insulating connecting member made of an elastic material, and connecting the insulating connecting member to a plurality of cap bodies. A technique is known in which a plurality of connecting bodies are provided and a deformation-resistant strip-shaped thermometer is inserted through them.

Japanese Utility Model Laid-Open No. 6-38157 JP-A-6-223803 Japanese Patent Application Laid-Open No. 2004-186232

By the way, in order to ensure the safety of an assembled battery including a plurality of cylindrical batteries arranged side by side, electronic parts such as current fuses, diodes, and PTC elements may be attached as protective parts. For example, an axial type electronic component having axial leads is placed between the electrode surfaces on one end surface side and the other end surface side of the assembled battery, or between the electrode surfaces on one end surface side of the assembled battery. It is connected between predetermined electrode surfaces of the battery group.

In such assembled batteries, insulation measures are taken to avoid contact of electronic parts with surfaces other than the predetermined electrode surfaces, and short circuits and accidents resulting therefrom. For example, in accordance with the position of the electronic component, a flat plate-shaped insulating ring in which the ring portions corresponding to each of the cylindrical battery groups are connected is provided on the end surface of the cylindrical battery group, or the side peripheral surface of the cylindrical battery group or the adjacent ring is provided. Insulation measures such as attaching insulating tape to the valleys between the cylindrical batteries are taken.

However, with conventional insulation measures, in order to achieve sufficient insulation, the number of parts required for insulation measures increases and the work becomes complicated. .

In one aspect, an object of the present invention is to realize an insulating ring capable of obtaining an assembled battery with high safety by suppressing complication of structure and assembly work. Another object of the present invention is to realize an assembled battery with high safety by using such an insulating ring and suppressing complication of structure and assembly work.

In one aspect, a ring portion corresponding to each electrode surface provided on one end surface side of the cylindrical battery group of an assembled battery including a group of cylindrical batteries arranged side by side and the adjacent ring portions are connected. and a wiring layer provided on a second main surface of the substrate opposite to the first main surface facing the cylindrical battery group. is provided.

Also, in one aspect, an assembled battery using the insulating ring as described above is provided.

In one aspect, it is possible to realize an insulating ring capable of obtaining an assembled battery with high safety while suppressing complication of structure and assembly work. In one aspect, using such an insulating ring makes it possible to realize an assembled battery with high safety by suppressing complication of structure and assembly work.

It is a figure explaining an example of an assembled battery. FIG. 4 is a diagram illustrating an example of an insulating ring according to the first embodiment; FIG. FIG. 2 is a diagram (part 1) illustrating a configuration example of an insulating ring according to the first embodiment; FIG. 2 is a diagram (part 2) illustrating a configuration example of an insulating ring according to the first embodiment; FIG. 10 is a diagram illustrating a first example of an assembled battery according to a second embodiment; FIG. It is a figure explaining an example of the connection member which concerns on 2nd Embodiment. FIG. 10 is a diagram illustrating a second example of the assembled battery according to the second embodiment; FIG. 10 is a diagram illustrating a third example of the assembled battery according to the second embodiment;

First, an example of an assembled battery will be described.
FIG. 1 is a diagram illustrating an example of an assembled battery. FIG. 1A shows a schematic plan view of an essential part of an example of an assembled battery. FIG. 1B schematically shows a main part side view of an example of the assembled battery.

The assembled battery 1000 shown in FIGS. 1A and 1B includes a group of three cylindrical batteries 1010 arranged in a line. Each cylindrical battery 1010 included in the assembled battery 1000 is a battery with a positive terminal provided on one end face side and a negative terminal provided on the other end face side. Here, the end surface of the cylindrical battery 1010 on which the positive terminal is provided is also referred to as "electrode surface" or "positive surface", and the end surface on which the negative terminal is provided is also referred to as "electrode surface" or "negative surface".

In the assembled battery 1000 shown in FIGS. 1A and 1B, a group of three cylindrical batteries 1010 are arranged in a line such that the negative surfaces and the positive surfaces are alternately arranged and connected in series. It is an example of an assembled battery. A group of three cylindrical batteries 1010 are fixed using an insulating ring 1020 provided on at least one of one end face side and the other end face side, for example, insulating rings 1020 provided on both end face sides respectively. . The insulating ring 1020 is a plate-shaped substrate in which a group of three ring portions 1021 corresponding to each electrode surface (positive electrode surface or negative electrode surface) provided on the end surface of the three cylindrical batteries 1010 group is connected. Each ring portion 1021 is provided with an opening leading to the electrode surface of the corresponding cylindrical battery 1010 . The insulating ring 1020 is formed on both sides so that each ring portion 1021 faces each electrode surface of the cylindrical battery 1010 group, and a part of the corresponding electrode surface is exposed from the opening provided in each ring portion 1021 . It is attached to the end surface of the cylindrical battery 1010 group using tape, adhesive, or the like. The group of cylindrical batteries 1010 is fixed with an insulating ring 1020 attached and arranged side by side in a row.

A tab 1030, which is a conductor member, is attached to each of the electrode surfaces exposed from the opening of the insulating ring 1020 of the group of cylindrical batteries 1010 fixed using the insulating ring 1020 using a method such as soldering or welding. The insulating ring 1020 prevents contact and short circuit between the tab 1030 and the electrode surface other than the electrode surface to which it is attached. For tab 1030, a dedicated tab with a relatively complex shape is used, with extensions 1031 extending into valleys between adjacent cylindrical cells 1010. FIG. For example, a tab 1030 is attached to each electrode surface of a group of cylindrical cells 1010 arranged side by side. Tabs 1030 attached to a given adjacent cylindrical battery 1010 may be connected by additional tabs 1040 . A pair of positive and negative lead wires 1050 for external connection of the assembled battery 1000 is soldered to some of the tabs 1030, for example, the tabs 1030 connected to the cylindrical batteries 1010 arranged at both ends of the row. For the pair of lead wires 1050 , a lead wire 1050 is used in which the connecting portions at the ends are exposed and the intermediate portions connected to the ends are covered with an insulating covering material (insulating covering material). One of the pair of lead wires 1050 is routed over the tab 1030 and the other is routed to extend into the valley between adjacent cylindrical cells 1010 . In assembled battery 1000, in order to avoid exposure of tab 1030 and the soldered portion between tab 1030 and lead wire 1050, and to avoid contact between tabs 1030 and 1040 and lead wire 1050, insulating tape 1060 is used. is pasted.

To ensure the safety of assembled battery 1000, an axial diode 1070 is connected as a protective component to extended portion 1031 of tab 1030 extending in a valley between adjacent cylindrical batteries 1010. FIG. Axial leads 1071 of diode 1070 are soldered to extensions 1031 of tabs 1030 that extend into valleys between adjacent cylindrical cells 1010 . In the valleys between adjacent cylindrical cells 1010, the sides of the cylindrical cells 1010 contact the diode 1070 and its axial lead 1071, the contact with the extended portion 1031 of the tab 1030, and the contact between the axial lead 1071 and the extended portion 1031. An insulating tape 1061 is applied to avoid contact with the soldered portion of the . One of the pair of lead wires 1050 is routed so as to extend into the valley between the adjacent cylindrical batteries 1010, and between the lead wire 1050 and the tab 1030 to which it is connected, a protective component , a current fuse 1090 is connected via the SPC connector 1080 . The SPC connector 1080 and current fuse 1090 are covered with insulating tubing 1062 to avoid contact with the sides of the cylindrical battery 1010 in the valley. Furthermore, the assembled battery 1000 is entirely covered with an outer insulating tube 1063 in order to prevent the soldered portion between the axial lead 1071 of the diode 1070 and the extended portion 1031 of the tab 1030 from being exposed.

In order to ensure the safety of the assembled battery 1000 as described above, in addition to the insulating ring 1020, insulating tapes 1060 and 1061, an insulating tube 1062, and an outer insulating tube 1063 are used for insulation. Insufficient insulation measures may lead to short circuits and accidents caused by short circuits.

However, in the assembled battery 1000 as described above, in order to achieve sufficient insulation, the number of parts required for insulation measures increases and the work becomes complicated. However, the structure and assembly work of the device may be complicated. Moreover, in the assembled battery 1000 as described above, when the axial lead 1071 of the diode 1070 and the extended portion 1031 of the tab 1030 are soldered, the heat may damage the insulating tape 1061 and cause a short circuit. In addition, in the assembled battery 1000 as described above, the lead wire 1050 routed over the tab 1030 collides with the tabs 1030 and 1040 due to vibrations during transportation and use, and the insulating coating material is damaged. and sometimes caused a short circuit.

In view of the above-described points, here, an insulation ring that can obtain an assembled battery with high safety while suppressing complication of the structure and assembly work is realized by a technique shown as an embodiment below. In addition, by using such an insulating ring, an assembled battery with high safety is realized by suppressing complication of structure and assembly work.

[First embodiment]
FIG. 2 is a diagram illustrating an example of an insulating ring according to the first embodiment. FIG. 2A schematically shows a plan view of essential parts of an example of the insulating ring according to the first embodiment. FIG. 2B schematically shows a main part side view of an example of the insulating ring according to the first embodiment. FIG. 2C schematically shows a bottom view of essential parts of an example of the insulating ring according to the first embodiment.

The insulating ring 1 shown in FIGS. 2(A) to 2(C) is an insulating ring attached to the three cylindrical battery groups of the assembled battery including the three cylindrical battery groups arranged side by side in one row. An example of a ring. Each cylindrical battery included in the assembled battery is a battery provided with a positive electrode terminal on one end face side and a negative electrode terminal on the other end face side. Here, the end surface of the cylindrical battery on which the positive electrode terminal is provided is also referred to as "electrode surface" or "positive electrode surface", and the end surface on which the negative electrode terminal is provided is also referred to as "electrode surface" or "negative electrode surface".

The insulating ring 1 shown in FIGS. 2A to 2C has a substrate 10, a wiring layer 20 and an insulating layer 30. FIG.
The substrate 10 is an insulating substrate. For the substrate 10, various insulating materials, for example, resin materials such as epoxy resins and phenol resins, or materials in which such resin materials are combined with fibers or sheets such as glass are used. Polycarbonate, polyethylene terephthalate, polypropylene, polyethylene, or the like may be used as the resin material of the substrate 10 . A material such as ceramics may be used for the substrate 10 . A flexible material having flexibility may be used for the substrate 10 . The thickness of the substrate 10 is, for example, approximately 0.1 mm to 1 mm. The substrate 10 connects the ring portions 11 corresponding to the respective electrode surfaces (positive electrode surface or negative electrode surface) provided on one end surface side of the three cylindrical battery groups of the assembled battery, and the adjacent ring portions 11. and a connecting portion 12 . Each ring portion 11 is provided with an opening 11a leading to the electrode surface of the corresponding cylindrical battery. The diameter of the opening 11a of the ring portion 11 of the substrate 10 is, for example, approximately 10 mm.

A wiring layer 20 having a predetermined pattern is provided on one main surface 10 a of the substrate 10 . When the substrate 10 is attached to the cylindrical battery group of the assembled battery, the main surface 10b opposite to the main surface 10a on which the wiring layer 20 is provided faces the cylindrical battery group. can be attached to For example, the main surface 10b of the substrate 10 on the side facing the cylindrical battery group can be configured without a conductor layer such as the wiring layer 20, as shown in FIGS. ) (and FIG. 3A described later) show an example of such a configuration. Various conductor materials such as metal materials such as copper (Cu) are used for the wiring layer 20 . Aluminum (Al), nickel (Ni), silver (Ag), gold (Au), or the like may be used as the metal material of the wiring layer 20 . The wiring layer 20 may be formed from a conductive paste obtained by mixing powder of a conductive material with a resin material.

FIG. 2A shows, as an example, a wiring layer having a first pattern 21, a second pattern 22, a third pattern 23, a fourth pattern 24, and a fifth pattern 25 which are separated from each other. 20 is shown. The pattern of the wiring layer 20 of the insulating ring 1 is not limited to that shown in FIG. 2(A). The arrangement and connection method of the cylindrical battery group of the assembled battery in which the insulating ring 1 is used, that is, the positive surface of the cylindrical battery group is aligned and arranged side by side on the side facing the insulating ring 1, or the negative surface is arranged side by side. Whether the cylindrical battery groups are connected in series or in parallel depends on whether they are aligned and arranged side by side or arranged side by side so that the positive electrode surface and the negative electrode surface are alternately arranged. Accordingly, the number, shape, layout, etc. of patterns of the wiring layer 20 of the insulating ring 1 are appropriately changed.

An insulating layer 30 having an opening 30a communicating with a predetermined portion of the wiring layer 20 is provided on the main surface 10a of the substrate 10 on which the wiring layer 20 is provided. For the insulating layer 30, various insulating materials such as organic materials such as resists and solder resists are used. Inorganic materials such as silicon oxide (SiO) and silicon nitride (SiN) may be used for the insulating layer 30 . Parts of the wiring layer 20 exposed through the openings 30a of the insulating layer 30 are provided with electronic components such as diodes and current fuses, tabs for connection with the cylindrical battery group of the assembled battery, and external connections of the assembled battery, as will be described later. A lead wire or the like for is connected.

For example, the insulating ring 1 has a configuration as shown in FIGS. A single-sided wiring type printed circuit board is provided with an insulating layer 30 such as a resist so as to partially cover it. The insulating ring 1 may be a single-sided wiring type printed circuit board having flexibility, that is, a so-called flexible circuit board.

3 and 4 are diagrams for explaining a configuration example of the insulating ring according to the first embodiment. FIG. 3A schematically shows a cross-sectional view of a main part of a first structural example of the insulating ring according to the first embodiment. FIG. 3B schematically shows a cross-sectional view of a main part of a second structural example of the insulating ring according to the first embodiment. FIG. 3C schematically shows a cross-sectional view of a main part of a third structural example of the insulating ring according to the first embodiment. Further, FIG. 4A schematically shows a plan view of a main part of a fourth structural example of the insulating ring according to the first embodiment. FIG. 4B schematically shows a plan view of a main portion of a fifth structural example of the insulating ring according to the first embodiment.

As shown in FIGS. 2(A) to 2(C), when the insulating ring 1 is a single-sided printed circuit board, the insulating ring 1 may be formed as shown in FIG. 3(A), for example. It can be configured to have a cross-sectional structure. That is, the insulating ring 1 includes a wiring layer 20 such as copper having a predetermined pattern on one main surface 10a of the substrate 10, and an insulating layer such as a resist having openings 30a leading to predetermined portions of the wiring layer 20. 30 is provided. Electronic components, tabs, lead wires, and the like are connected to portions of the wiring layer 20 exposed through the openings 30 a of the insulating layer 30 . The main surface 10b of the insulating ring 1, which is opposite to the main surface 10a of the substrate 10 on which the wiring layer 20 and the insulating layer 30 partially covering the wiring layer 20 are provided, faces the cylindrical battery group of the assembled battery. and attached to these cylindrical battery groups using double-sided tape, adhesive, or the like.

Further, the insulating ring attached to the cylindrical battery group of the assembled battery is not limited to the configuration like the insulating ring 1 shown in FIGS. 2A to 2C and 3A. configuration may be employed.

For example, the insulating ring attached to the cylindrical battery group of the assembled battery may adopt a configuration like the insulating ring 1a shown in FIG. 3(B). The insulating ring 1a shown in FIG. 3B is a single-sided wiring type printed circuit board, and has another main surface 10b on the side opposite to the main surface 10a of the substrate 10 on which the wiring layer 20 and the insulating layer 30 are provided. It has a configuration in which an insulating layer 31 is provided. For the insulating layer 31 provided on the main surface 10b side of the substrate 10, the same material as the insulating layer 30 provided on the main surface 10a side of the substrate 10, that is, an insulating material such as resist can be used. The insulating layer 31 has a function of protecting the main surface 10b of the substrate 10 of the insulating ring 1a, and has an adhesion strength when the cylindrical battery group and the insulating ring 1a are adhered using a double-sided tape, an adhesive, or the like. can be provided with a function to enhance

Moreover, the insulating ring attached to the cylindrical battery group of the assembled battery may adopt a configuration like the insulating ring 1b shown in FIG. 3(C). The insulating ring 1b shown in FIG. 3(C) is a double-sided wiring type printed board, and a predetermined It has a configuration in which another wiring layer 26 having a pattern and another insulating layer 31 covering the entire wiring layer 26 are provided. The substrate 10 is provided with vias 27 (or via holes) that penetrate between the main surface 10a and the main surface 10b and connect the wiring layer 20 on the main surface 10a and the wiring layer 26 on the main surface 10b. be done. The wiring layer 26 provided on the main surface 10b side of the substrate 10 is made of the same material as the wiring layer 20 provided on the main surface 10a side of the substrate 10, that is, a metal material such as copper, a conductor paste, or the like. can be used. Similarly, the via 27 can be made of a metallic material such as copper, a conductive paste, or the like. An insulating material such as resist can be used for the insulating layer 31 provided on the main surface 10b side of the substrate 10 . As in the insulating ring 1b shown in FIG. 3C, by using a double-sided wiring type printed circuit board, the number of patterns of the wiring layer 20 provided on the main surface 10a of the substrate 10 is increased, and the degree of freedom of the pattern shape is improved. In addition, it is possible to improve the degree of freedom of layout of the portion exposed from the insulating layer 30 (the portion to which the electronic parts or the like are connected).

For example, the printed circuit board of the insulating ring 1 as shown in FIGS. 2A to 2C and FIG. 3A, the insulating ring 1a shown in FIG. Any printed circuit board of the insulating ring 1b shown can be formed using a subtractive method or an additive method.

The insulating rings 1, 1a, 1b, etc. (also referred to as the insulating rings 1, etc.) as described above are provided with electronic components, such as diodes and current fuses, which are used as protective parts of the assembled battery, prior to attachment to the cylindrical battery group of the assembled battery. Components may be pre-mounted. As an example in FIG. 4A, three surface-mounted diodes 40 and one current fuse 50 are mounted on the portion of the wiring layer 20 exposed from the opening 30a of the insulating layer 30 of the insulating ring 1. configuration. The insulating ring 1 is mounted with surface mount type electronic components such as a diode 40 and a current fuse 50 shown in FIG. 4A, instead of axial type electronic components having axial leads. The diode 40 and the current fuse 50 are joined to the wiring layer 20 in the opening 30 a of the insulating layer 30 using a jointing material 60 such as solder, and are connected to the wiring layer 20 . In the example of FIG. 4A, between the first pattern 21 and the second pattern 22, between the second pattern 22 and the third pattern 23, between the fourth pattern 24 and the first pattern 21 , and diodes 40 are connected respectively. A current fuse 50 is connected between the fourth pattern 24 and the fifth pattern 25 .

As shown in FIG. 4(A), if the diode 40 and the current fuse 50 are mounted in advance before the assembled battery is attached to the cylindrical battery group, the diode 40 and the current fuse 50 are mounted on the insulating ring 1 after attachment to the cylindrical battery group. The step of mounting 40 and current fuse 50 becomes unnecessary. Moreover, if the diode 40 and the current fuse 50 are mounted in advance, it is tested whether the diode 40 and the current fuse 50 are properly mounted on the insulating ring 1 before attaching the assembled battery to the cylindrical battery group. It is also possible to By attaching the insulating ring 1 in which the diode 40 and the current fuse 50 are properly mounted to the cylindrical battery group of the assembled battery, the diode 40 and the current fuse 50 are mounted after the mounting to the cylindrical battery group. It becomes possible to avoid connection errors and connection failures.

Further, as shown in FIG. 4B, the insulation ring 1 on which the diode 40 and the current fuse 50 are mounted is further attached with a tab 70 and a lead wire 80 in advance before the assembled battery is attached to the cylindrical battery group. MAY be implemented.

For example, the other end (connection portion 70b) of the tab 70, one end (connection portion 70a) of which is connected to each electrode surface (positive electrode surface or negative electrode surface) of the cylindrical battery group, is connected to the opening of the insulating layer 30 of the insulating ring 1. The portion of the wiring layer 20 exposed from the portion 30a is connected using a joining material such as solder or a technique such as welding. The tab 70 can be a relatively simple flat rectangular tab. The insulating ring 1 may be pre-mounted with tabs for connecting between the electrode surfaces of different ones of the cylindrical battery groups. Such a method is used when an intermediate portion between (connecting portions) is mounted on the insulating ring 1 and, for example, an insulating ring 1d as shown in FIG. 7, which will be described later, is prepared in advance.

For example, as the lead wiring 80, one ends (connecting portions 81a, 82a) of a pair of positive and negative lead wirings 81, 82 for external connection of the assembled battery are exposed from the opening 30a of the insulating layer 30 of the insulating ring 1. , using a bonding material such as solder or using a technique such as welding. In addition, as the lead wire 80, the other end (connection portion 83b) of the lead wire 83, one end (connection portion) of which is connected to the electrode surface of the predetermined cylindrical battery or the tab connected thereto, is connected to the insulating layer 30 of the insulating ring 1. The portion of the wiring layer 20 exposed from the opening 30a is connected using a bonding material such as solder or a technique such as welding.

In this manner, the diode 40 and the current fuse 50 may be mounted in advance on the insulating ring 1 (FIG. 4A), and the tab 70 and the lead wire 80 may be further mounted (FIG. 4B). ). In addition to the diode 40 and the current fuse 50 , only one of the tab 70 and the lead wire 80 may be mounted on the insulating ring 1 . Although the insulating ring 1 is used as an example here, the diode 40 and the current fuse 50 can be similarly mounted on the insulating rings 1a and 1b (FIGS. 3(B) and 3(C)). Further tabs 70 and lead wires 80 can be mounted.

The insulating ring 1 and the like as described above are used to assemble the assembled battery. According to the insulating ring 1 and the like, as will be described later, an increase in the number of parts required for insulation measures and complication of work, for example, an increase in work man-hours and mistakes in assembly work are suppressed, and the structure of the assembled battery and complication of assembly work are suppressed. can be suppressed to obtain a highly safe assembled battery that realizes sufficient insulation. In addition, according to the insulating ring 1 and the like, the use of axial type electronic components and the use of special tabs with relatively complicated shapes are not required, and the use of insulating members (insulating tape, lead wiring, etc.) that may occur with their use is eliminated. It is possible to avoid a short circuit or the like caused by damage of the insulation coating material).

[Second embodiment]
Here, an example of an assembled battery using an insulating ring having the above configuration will be described as a second embodiment.

FIG. 5 is a diagram illustrating a first example of the assembled battery according to the second embodiment. FIG. 5A schematically shows a plan view of essential parts of a first example of the assembled battery according to the second embodiment. FIG. 5B schematically shows a main part side view of the first example of the assembled battery according to the second embodiment. FIG. 5C schematically shows a bottom view of essential parts of the first example of the assembled battery according to the second embodiment.

An assembled battery 100A shown in FIGS. 5A to 5C is an example of an assembled battery including a group of three cylindrical batteries 110 arranged in a line. Each cylindrical battery 110 included in the assembled battery 100A is a battery having a positive electrode terminal provided on one end face side and a negative electrode terminal provided on the other end face side. A lithium primary battery, for example, is used for each cylindrical battery 110 . A lithium secondary battery, a nickel-metal hydride battery, an alkaline dry battery, or the like may be used for each cylindrical battery 110 . Here, the end surface of the cylindrical battery 110 on which the positive terminal is provided is also referred to as "electrode surface" or "positive surface", and the end surface on which the negative terminal is provided is also referred to as "electrode surface" or "negative surface".

FIGS. 5A to 5C show, as an example, an assembled battery 100A in which a group of cylindrical batteries 110 are connected in series. For example, in the group of cylindrical batteries 110, the negative surface 110b of the group of cylindrical batteries 110 is aligned with one end surface of the assembled battery 100A, and the positive surface 110a of the group of cylindrical batteries 110 is aligned with the other end surface of the assembled battery 100A. They are arranged side by side in one row. For example, the insulating ring 1 of the printed circuit board as described in the first embodiment is attached to the end surface side of the assembled battery 100A where the negative surfaces 110b of the cylindrical batteries 110 are aligned using double-sided tape or the like. be done. On the end face side of the assembled battery 100A where the positive electrode faces 110a of the cylindrical batteries 110 are aligned, for example, a normal flat insulating ring 2 formed using a resin material such as polycarbonate is attached using double-sided tape or the like. can be installed. A negative electrode surface 110b (negative terminal provided there) of the cylindrical battery 110 group is exposed from the opening 11a of the insulating ring 1 attached to the cylindrical battery 110 group. Through the opening 2a of the insulating ring 2 attached to the cylindrical battery 110 group, the positive electrode surface 110a (positive electrode terminal provided there) of the cylindrical battery 110 group is exposed. The insulating ring 1 and the insulating ring 2 fix a group of cylindrical batteries 110 arranged side by side in a row.

The insulating ring 1 of the printed circuit board includes an insulating substrate 10, a wiring layer 20 having a predetermined pattern provided on the substrate 10, and an insulating layer 30 having an opening 30a communicating with a predetermined portion of the wiring layer 20. include. Diodes 40 and current fuses 50 are mounted on the insulating ring 1 in advance before attachment to the group of cylindrical batteries 110 . The tab 70 and lead wires 81 , 82 , 83 may be connected to the insulating ring 1 in advance before being attached to the group of cylindrical batteries 110 . The tab 70 and the lead wires 81, 82, 83 may be connected to the insulating ring 1 after attachment to the cylindrical battery 110 group.

In assembled battery 100A, tab 70 is connected to each of negative electrode surfaces 110b of cylindrical battery 110 group exposed from opening 11a of insulating ring 1 . The tab 70 is a relatively simple planar rectangular plate-like conductor member that connects each of the negative surfaces 110b of the group of cylindrical batteries 110 to a predetermined portion of the wiring layer 20 of the insulating ring 1, respectively. One connecting portion 70a of the flat tab 70 is connected to the negative electrode surface 110b of the cylindrical battery 110, and the other connecting portion 70b is connected to a predetermined portion of the wiring layer 20 of the insulating ring 1. FIG. The tab 70 is connected to the negative surface 110b of the cylindrical battery 110 and a predetermined portion of the wiring layer 20 of the insulating ring 1 using a bonding material such as solder or a technique such as welding.

In the assembled battery 100A, a pair of positive and negative lead wires 81 and 82 for external connection of the assembled battery 100A and a positive electrode surface 110a of a prescribed cylindrical battery 110 are provided at predetermined portions of the wiring layer 20 of the insulating ring 1. lead wire 83 is connected. Connection portions 81a and 82a of a pair of positive and negative lead wires 81 and 82 for external connection and connection portion 83b of a lead wire 83 for connection to the positive electrode surface 110a of the cylindrical battery 110 are connected to the wiring layer 20 of the insulating ring 1. Connected to a predetermined site. The lead wires 81, 82 and 83 are connected to predetermined portions of the wiring layer 20 of the insulating ring 1 using a bonding material such as solder or a technique such as welding.

In the assembled battery 100A, tabs 71, which are flat conductor members, are connected to each of the positive surfaces 110a of the cylindrical batteries 110 exposed from the opening 2a of the insulating ring 2. As shown in FIG. The tab 71 is connected to the positive electrode surface 110a of the cylindrical battery 110 using a bonding material such as solder or a technique such as welding. The other connection portion 83 a of the lead wire 83 , one connection portion 83 b of which is connected to a predetermined portion of the wiring layer 20 of the insulating ring 1 , is connected to the tab 71 connected to the positive electrode surface 110 a of the cylindrical battery 110 . be. Lead wires 83 are arranged along the valleys between adjacent cylindrical batteries 110 . The position of the portion of the wiring layer 20 to which one connection portion 83b is connected so that the lead wire 83 can be arranged along the valley between the adjacent cylindrical batteries 110 (the position of the opening 30a of the insulating layer 30) is set.

In the case of the assembled battery 100A in which a group of cylindrical batteries 110 are connected in series, for example, among the group of cylindrical batteries 110 arranged side by side in the horizontal direction of the drawing, the negative electrode surface 110b of the leftmost cylindrical battery 110 is connected to the tab. The lead wire 83 connected to the first pattern 21 of the wiring layer 20 of the insulating ring 1 through 70 is connected to the positive electrode surface 110a of the central cylindrical battery 110 through the tab 71. be. The negative surface 110b of the central cylindrical battery 110 is connected to the second pattern 22 of the wiring layer 20 of the insulating ring 1 through the tab 70, and the lead wiring 83 connected to the second pattern 22 is connected to the rightmost cylindrical battery. It is connected to the positive surface 110 a of the battery 110 through the tab 71 . The negative surface 110b of the cylindrical battery 110 on the right end is connected through the tab 70 to the third pattern 23 of the wiring layer 20 of the insulating ring 1 to which the lead wiring 81 for external connection is connected. The positive surface 110a of the leftmost cylindrical battery 110 is connected to the fourth pattern 24 of the wiring layer 20 of the insulating ring 1 through the tab 71 and the lead wire 83 connected thereto, and the fourth pattern 24 is a current fuse. 50, it is connected to the fifth pattern 25 of the wiring layer 20 of the insulating ring 1 to which the lead wiring 82 for external connection is connected. Diodes 40 are provided between the first pattern 21 and the second pattern 22, between the second pattern 22 and the third pattern 23, and between the fourth pattern 24 and the first pattern 21, respectively. Connected.

In the assembled battery 100A, a group of cylindrical batteries 110, an insulating ring 1 on which a diode 40 and a current fuse 50 are mounted, an insulating ring 2, tabs 70 and 71, and lead wires 83 are arranged so that the lead wires 81 and 82 are led out to the outside. is covered with an outer insulation tube 90 .

In the assembled battery 100A having the above configuration, the wiring layer 20 is provided on the insulating ring 1 that fixes the group of cylindrical batteries 110, and the surface of the insulating ring 1 as a protective component is connected to the wiring layer 20. A mounted diode 40 and a current fuse 50 are mounted. Furthermore, in the assembled battery 100A, the negative electrode surface 110b of the group of cylindrical batteries 110 is connected to the wiring layer 20 of the insulating ring 1 by a tab 70 having a relatively simple plane rectangular flat plate shape. The assembled battery 100A does not require the use of axial electronic components as protective components. In addition, a dedicated tab with a relatively complex shape such as that used when connecting axial electronic components to the electrode surfaces of a given cylindrical battery 110 by placing them in the valleys between adjacent cylindrical batteries 110 ( It is not necessary to prepare the tab 1030 or the like shown in FIG. 1(A).

In assembled battery 100A, lead wires 81 and 82 are connected to insulating ring 1 attached to negative electrode surface 110b of cylindrical battery 110 group, and lead wire 83 is connected to insulating ring 1 and the positive electrode surface of cylindrical battery 110 group. It is connected to the tab 71 attached to the 110a side. For the lead wires 81, 82 and 83, the ends that are connected to the insulating ring 1 and the tab 71 are exposed and the intermediate portions connected to the ends are covered with an insulating coating material. In the assembled battery 100A, the connecting portions of the lead wires 81, 82 and 83 to the insulating ring 1 and the tab 71 are not arranged on the side surface of the cylindrical battery 110 group. Therefore, it is not necessary to attach an insulating tape to the side surface of the cylindrical battery 110 group.

Since the assembled battery 100A does not require the use of axial electronic components or the preparation of dedicated tabs therefor, after fixing the cylindrical battery 110 group with the insulating ring 1, such dedicated tabs are attached to the electrode surfaces. It eliminates the need to connect and mount axial electronic components on dedicated tabs. In addition, in the assembled battery 100A, it becomes unnecessary to attach an insulating tape to the side surface of the cylindrical battery 110 group, and it becomes unnecessary to mount an axial type electronic component and prepare a dedicated tab for that purpose. Also, it is possible to avoid the occurrence of a defect such as a short circuit caused by damage to the insulating tape due to heat generated when the electronic component is soldered to the dedicated tab.

In the assembled battery 100A, the lead wires 81 and 82 are connected to the wiring layer 20 of the insulating ring 1, and routed by the wiring layer 20 to a predetermined cylindrical battery 110 position. Since the lead wires 81 and 82 are not routed over the tab 70, the collision between the lead wires 81 and 82 and the tab 70 is avoided, and the breakage of the insulation coating material of the lead wires 81 and 82 due to the collision and the resulting short circuit are prevented. Avoided.

In the assembled battery 100A, the negative electrode surfaces 110b of the cylindrical batteries 110 are aligned on one end surface side, and the positive electrode surfaces 110a are aligned on the other end surface side, and arranged in a row. By aligning the polarities of the cylindrical batteries 110 in this way, it is possible to reduce the risk of erroneously short-circuiting during the assembly work.

According to the assembled battery 100A using the insulating ring 1, an increase in the number of parts required for insulation measures and complication of work, for example, an increase in work man-hours and mistakes in assembly work can be suppressed, and the complexity of the structure and assembly work of the assembled battery can be suppressed. degeneration is suppressed. As a result, the assembled battery 100A with sufficient insulation and high safety is obtained.

Here, an assembled battery 100A in which a group of cylindrical batteries 110 arranged side by side with the same polarity is connected in series using the insulating ring 1 is shown, but the pattern of the wiring layer 20 of the insulating ring 1, etc. may be changed as appropriate. Thus, it is possible to obtain an assembled battery in which a group of cylindrical batteries 110 arranged in parallel with the same polarity are connected in parallel.

Also, although an example using the insulating ring 1 is shown here, an assembled battery can be similarly obtained using the insulating rings 1a, 1b and the like.
In this example, the insulating ring 1 of the printed circuit board is attached to the negative electrode surface 110b side of the cylindrical battery 110, and the normal insulating ring 2 is attached to the positive electrode surface 110a side. An insulating ring of a printed circuit board can also be attached to the surface 110a side. It is also possible to connect the tab 71 and the lead wiring 83 to the wiring layer of the insulating ring of the printed circuit board attached to the positive surface 110a side, and to mount electronic components such as the surface-mounted diode 40 and the current fuse 50. .

Moreover, the connection between the positive electrode surface 110a of the cylindrical battery 110 and the wiring layer 20 of the insulating ring 1 of the printed circuit board attached to the negative electrode surface 110b side is not limited to the lead wire 83 and the tab 71. It is also possible to use a connection member as shown in .

FIG. 6 is a diagram illustrating an example of a connecting member according to the second embodiment. FIG. 6A schematically shows a main part front view of an example of the connection member according to the second embodiment. FIG. 6B schematically shows a main part side view of an example of the connection member according to the second embodiment.

The connection member 84 shown in FIGS. 6(A) and 6(B) is an insulating covering material covering a flat tab 84a and an intermediate portion between both ends 84aa and 84ab and connected to the both ends 84aa and 84ab. 84b. One end portion 84ab of the tab 84a is connected to the wiring layer 20 of the insulation ring 1 of the printed circuit board attached to the negative electrode surface 110b side of the cylindrical battery 110 group, using a bonding material such as solder or a method such as welding. is used to connect. The other end 84aa of the tab 84a is connected to the positive electrode surface 110a of the cylindrical battery 110 group using a bonding material such as solder or a technique such as welding. The insulating coating material 84b of the tab 84a has one end 84ab connected to the wiring layer 20 of the insulating ring 1 and the other end 84aa connected to the positive electrode surface 110a. avoid. Various insulating materials such as fluorine resin, polyimide resin, and silicone rubber can be used for the insulating coating material 84b.

Instead of the lead wires 83 and the tabs 71 as described above, a connecting member 84 including a tab 84a and an insulating coating material 84b as shown in FIGS. It is possible to reduce the number of parts and reduce the number of man-hours.

The cylindrical batteries 110 may be arranged side by side with the polarities aligned as described above, or may be arranged side by side so that the polarities alternate between positive and negative.
FIG. 7 is a diagram illustrating a second example of the assembled battery according to the second embodiment. FIG. 7A schematically shows a plan view of essential parts of a second example of the assembled battery according to the second embodiment. FIG. 7B schematically shows a bottom view of essential parts of a second example of the assembled battery according to the second embodiment.

The assembled battery 100B shown in FIGS. 7(A) and 7(B) is a set in which a group of three cylindrical batteries 110 are arranged side by side in a line such that the negative electrode surface 110b and the positive electrode surface 110a are alternately arranged. An example of a battery. In the assembled battery 100B, the insulating ring 1d of the printed circuit board is attached to one end surface of the group of cylindrical batteries 110 arranged in parallel in this way, and the ordinary insulating ring 2 is attached to the other end surface of the cylindrical battery 100B. A group of shaped batteries 110 are connected in series.

In the assembled battery 100B, for example, among the cylindrical batteries 110 arranged side by side in the horizontal direction of the drawing, the negative electrode surface 110b of the leftmost cylindrical battery 110 is connected to the positive electrode surface of the central cylindrical battery 110 through the tab 70. It is connected to surface 110a. The negative surface 110b of the central cylindrical battery 110 is connected through a tab 71 to the positive surface 110a of the rightmost cylindrical battery 110 . The positive surface 110a of the rightmost cylindrical battery 110 is connected to the second pattern 22 of the wiring layer 20 of the insulating ring 1d through the tab 71 and the lead wire 83 connected thereto, and the negative surface 110a of the rightmost cylindrical battery 110 is connected to the second pattern 22 of the wiring layer 20 of the insulating ring 1d. 110b is connected through tab 70 to third pattern 23 of wiring layer 20 of insulating ring 1d to which lead wiring 81 for external connection is connected. The positive surface 110a of the leftmost cylindrical battery 110 is connected to the fourth pattern 24 of the wiring layer 20 of the insulating ring 1d through the tab 71 and the lead wire 83 connected thereto, and the fourth pattern 24 is a current fuse. 50, it is connected to the fifth pattern 25 of the wiring layer 20 of the insulating ring 1d to which the lead wiring 82 for external connection is connected. Diodes 40 are provided between the first pattern 21 and the second pattern 22, between the second pattern 22 and the third pattern 23, and between the fourth pattern 24 and the first pattern 21, respectively. Connected.

Although illustration is omitted here, in the assembled battery 100B, a group of cylindrical batteries 110, an insulating ring 1d mounted with a diode 40 and a current fuse 50, an insulating ring 2, an insulating ring 2, Tabs 70, 71 and lead wires 83 are covered with an outer insulation tube.

In the assembled battery 100B, the polarities of the group of cylindrical batteries 110 are alternated. 1 tab 71 and 1 lead wire 83 can be eliminated. According to the assembled battery 100B, further reduction in the number of parts makes it possible to further suppress complication of the structure of the assembled battery and assembly work.

Here, an example is shown in which the insulating ring 1d of the printed circuit board is attached to one end surface side of the cylindrical battery 110 group, and the ordinary insulating ring 2 is attached to the other end surface side. The insulating ring of the printed circuit board can also be attached to the side. It is also possible to connect the tab 71 and the lead wiring 83 to the wiring layer of the insulating ring of the printed circuit board attached to the other end face side, and mount electronic components such as the surface-mounted diode 40 and the current fuse 50. .

In the assembled battery 100B, instead of the lead wires 83 and the tabs 71, the connection members 84 shown in FIGS. 6A and 6B can be used. This makes it possible to reduce the number of parts of the assembled battery 100B and reduce the number of working steps.

In the above description, the assembled batteries 100A and 100B including three cylindrical battery 110 groups arranged side by side in one row are shown, but the number of cylindrical battery 110 groups included in the assembled battery is three. It is not limited.

FIG. 8 is a diagram illustrating a third example of the assembled battery according to the second embodiment. FIG. 8A schematically shows a plan view of essential parts of a third example of the assembled battery according to the second embodiment. FIG. 8B schematically shows a bottom view of essential parts of a third example of the assembled battery according to the second embodiment.

An assembled battery 100C shown in FIGS. 8A and 8B includes a group of seven cylindrical batteries 110 arranged in a line. 8(A) and 8(B) show, as an example, an assembled battery 100C in which a group of cylindrical batteries 110 arranged side by side with negative electrode surfaces 110b and positive electrode surfaces 110a arranged alternately are connected in series. showing.

In the assembled battery 100C, the insulating ring 1e of the printed circuit board is attached to one end surface of the cylindrical battery 110 group, and the normal insulating ring 2 is attached to the other end surface. The tab 70 connects the negative surface 110b and the positive surface 110a of the adjacent cylindrical battery 110 on the end surface side where the insulating ring 1e of the printed circuit board is attached, and the adjacent cylindrical battery 110b and the positive surface 110a are connected by the tab 70 on the end surface side where the normal insulating ring 2 is attached. A tab 71 connects the positive electrode surface 110 a and the negative electrode surface 110 b of the battery 110 . The positive electrode surface 110a on the end surface side to which the insulating ring 2 is attached of the cylindrical battery 110 group is connected to the wiring layer 20 of the insulating ring 1e through the tab 71 connected thereto and the lead wire 83 connected to the tab 71. be done. The negative electrode surface 110b of the cylindrical battery 110 at the right end of the cylindrical batteries 110 arranged in a row in the horizontal direction of the drawing is connected to the lead wiring 81 for external connection through the tab 70, and is connected to the wiring layer of the insulating ring 1e. 20. The wiring layer 20 of the insulating ring 1e to which the positive electrode surface 110a of the leftmost cylindrical battery 110 is connected through the tab 71 and the lead wire 83 is connected to the lead wire 82 for external connection through the current fuse 50. is connected to the wiring layer 20 of Diodes 40 are connected between predetermined patterns of the wiring layer 20 of the insulating ring 1e.

Although illustration is omitted here, in the assembled battery 100C, a group of cylindrical batteries 110, an insulating ring 1d mounted with a diode 40 and a current fuse 50, an insulating ring 2, an insulating ring 2, Tabs 70, 71 and lead wires 83 are covered with an outer insulation tube.

In the assembled battery 100C, by alternating the polarities of the cylindrical batteries 110, the number of tabs 70 and 71 and the number of lead wires 83 to be used can be reduced compared to the case where the polarities are aligned. be possible. As a result, the structure of the assembled battery and the complication of assembly work can be suppressed.

Here, an example is shown in which the insulating ring 1e of the printed circuit board is attached to one end surface side of the cylindrical battery 110 group, and the ordinary insulating ring 2 is attached to the other end surface side. The insulating ring of the printed circuit board can also be attached to the side. It is also possible to connect the tab 71 and the lead wiring 83 to the wiring layer of the insulating ring of the printed circuit board attached to the other end face side, and mount electronic components such as the surface-mounted diode 40 and the current fuse 50. .

In the assembled battery 100C, instead of the lead wires 83 and tabs 71, connection members 84 as shown in FIGS. 6A and 6B can be used. As a result, it is possible to reduce the number of parts of the assembled battery 100C and reduce the number of working steps.

It is also possible to arrange a group of seven cylindrical batteries 110 arranged in a line with their polarities aligned and connected in series or in parallel.
Further, the number of cylindrical batteries 110 included in the assembled battery is not limited to 3 or 7, and may be 4 to 6 or 8 or more.

In the above description, an assembled battery in which a group of cylindrical batteries 110 are arranged side by side in one row is taken as an example. A substrate 10 including a ring portion 11 connected in accordance with the arrangement of the cylindrical battery 110 group, an insulating ring of a printed circuit board having a wiring layer 20 and an insulating layer 30 is attached, and a plurality of rows of cylindrical battery 110 groups are connected in series or Parallel connection is also possible.

Reference Signs List 1, 1a, 1b, 1d, 1e, 2, 1020 insulating ring 2a, 11a, 30a opening 10 substrate 10a, 10b main surface 11, 1021 ring portion 12 connecting portion 20, 26 wiring layer 21, 22, 23, 24, 25 pattern 27 via 30, 31 insulating layer 40, 1070 diode 50, 1090 current fuse 60 joining material 70, 71, 84a, 1030, 1040 tab 70a, 70b, 81a, 82a, 83a, 83b connecting portion 80, 81, 82, 83, 1050 Lead wire 84 Connection member 84aa, 84ab End 84b Insulating coating material 90 Exterior insulating tube 100A, 100B, 100C, 1000 Battery assembly 110, 1010 Cylindrical battery 110a Positive electrode surface 110b Negative electrode surface 1031 Extension 1060, 1061 Insulating tape 1062 Insulating tube 1063 Outer insulating tube 1071 Axial lead 1080 SPC connector

Claims (11)

In an assembled battery including cylindrical battery groups arranged in parallel, a ring portion corresponding to each electrode surface provided on one end surface side of the cylindrical battery group and a connecting portion connecting the adjacent ring portions are provided. an insulating substrate comprising;
and a wiring layer provided on a second main surface of the substrate opposite to the first main surface facing the cylindrical battery group. 2. The insulating ring according to claim 1, wherein the insulating ring is a printed board having the wiring layer provided on the second main surface of the board. 3. The insulating ring according to claim 1, further comprising an electronic component mounted on said wiring layer. 4. The insulating ring according to any one of claims 1 to 3, wherein the insulating ring is flexible. a group of cylindrical batteries arranged side by side;
a first insulating ring attached to one end face side of the cylindrical battery group,
The first insulating ring is
An insulative first ring comprising a first ring portion corresponding to each first electrode surface provided on the one end surface side of the cylindrical battery group, and a first connecting portion connecting the adjacent first ring portions. 1 substrate;
and a first wiring layer provided on a second main surface of the first substrate opposite to the first main surface facing the cylindrical battery group. 6. The assembled battery according to claim 5, wherein the first insulating ring is a printed circuit board having the first wiring layer provided on the second main surface of the first substrate. 7. The assembled battery according to claim 5, wherein said first insulating ring has an electronic component mounted on said first wiring layer. The assembled battery according to any one of claims 5 to 7, wherein the first insulating ring has flexibility. A plate-shaped conductor member including a first connection portion connected to the first wiring layer and a second connection portion connected to the first electrode surface located inside the first ring portion. The assembled battery according to any one of claims 5 to 8. a second ring portion attached to the other end surface side of the cylindrical battery group and corresponding to each second electrode surface provided on the other end surface side of the cylindrical battery group; 10. The assembled battery according to any one of claims 5 to 9, comprising a second insulating ring having an insulating second substrate with a connecting second connecting portion. a third connection portion connected to the first wiring layer;
a fourth connection portion connected to the second electrode surface located inside the second ring portion;
an intermediate portion connected to the third connection portion and the fourth connection portion, extending along a side surface between the one end surface and the other end surface of the cylindrical battery group, and covered with an insulating covering material; 11. The assembled battery according to claim 10, comprising a connecting member comprising:

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