JP2003323879A - Electrode connecting structure of flat battery - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electrode connecting structure of a flat battery, in which a thin flat electrode of the flat battery provided with a thin flat electrode can be connected easily in a state of a high toughness, a high vibration resistance, and a high impact resistance. <P>SOLUTION: When the electrodes of the flat battery 1 provided with the thin flat electrodes (positive electrode 11 and negative electrode 12) are connected, in a state that positions of slits 21, 31 of two sheets of insulation plates 2, 3 respectively provided with the slits 21, 31 into which a plurality of sheets of the thin plate electrodes 11, 12 are capable of being inserted are coincided and overlapped, a plurality of sheets of the thin flat electrodes 11, 12 are overlapped and inserted into the slits 21, 31. By sliding the one insulation plate 2 against the other insulation plate 3, a plurality of sheets of the thin flat electrodes 11, 12 is mutually overlapped and connected between two sheets of the insulation plates 2, 3. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plate-shaped battery electrode connection structure including thin plate-shaped electrodes.

[0002]

2. Description of the Related Art In recent years, attention has been paid to hybrid vehicles, electric vehicles, load leveling of electric power for effectively utilizing night electric power, and the like due to environmental problems. Therefore,
Various secondary batteries have been developed as batteries used for these.

Since the lithium ion secondary battery has a high energy density, is of a sealed type and is maintenance-free,
It is suitable for use as a battery in hybrid vehicles and electric vehicles, but large ones have not been put to practical use.
Therefore, in order to increase the battery capacity and voltage, it is necessary to connect a plurality of batteries in parallel or in series.

On the other hand, a plate-shaped lithium ion secondary battery has been developed in which a laminate sheet formed by coating both surfaces of a metal layer with a resin layer is used as an exterior material, and a power generating element is enclosed in the exterior sheet. In this plate-shaped secondary battery, the positive electrode and the negative electrode are drawn out as thin plate-shaped leads, so when these are connected to each other to form a battery used in a hybrid vehicle, an electric vehicle, or the like, each secondary battery is used. The thin plate electrode connection structure of the battery needs to have high toughness, vibration resistance, and impact resistance.

Conventionally, as a method of connecting thin plate electrodes of a battery, there are a method of connecting via a metal insulating plate, a method of connecting using a conductive adhesive, and the like. When using a metal insulating plate, it is necessary to process the thin plate electrode tab of the battery. Moreover, the number of parts increases depending on the number of batteries to be connected. When a conductive adhesive is used, the magnitude of its electric resistance and durability may be a problem, and it is difficult to replace the battery after bonding.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to connect thin plate electrodes of a plate battery having thin plate electrodes easily and in a state of high toughness, vibration resistance and impact resistance. It is an object of the present invention to provide an electrode connection structure for a plate-shaped battery.

[0007]

In order to solve the above-mentioned problems, the invention according to claim 1 is an electrode connection structure for a plate-shaped battery provided with thin plate-shaped electrodes, wherein a plurality of the thin plate-shaped electrodes are provided. In a state where the slits of two insulating plates each having an insertable slit are aligned and stacked, the plurality of thin plate electrodes are inserted into the slits, and the one insulating plate is insulated from the other. The plurality of thin plate-shaped electrodes are in a connected state in which the plurality of thin plate-shaped electrodes overlap each other between the two insulating plates in a state of being slid with respect to the plate.

According to the first aspect of the present invention, the slits of the two insulating plates are aligned with each other, and a plurality of thin plate-shaped electrodes are inserted into the slits so that one insulating plate is insulated from the other. Since the plurality of thin plate-shaped electrodes slide on the plate and are in a connection state in which these two insulating plates are overlapped with each other between the two insulating plates, it is possible to insulate the two thin plate-shaped electrodes of the plate-shaped battery without processing. The plate can easily and reliably connect the thin plate electrodes of the plate battery. Also, when replacing the plate battery,
By sliding the two insulating plates in opposite directions, it is possible to easily remove the thin plate electrodes of the plurality of plate batteries connected to each other.

According to a second aspect of the present invention, in the electrode connecting structure for the plate-shaped battery according to the first aspect, the slit has a rounded opening edge on the side where the two insulating plates face each other. It is characterized by being.

According to the invention of claim 2, claim 1
The effect similar to that of the invention described in 1) is obtained, and the opening edge of the slit is rounded on the surface side where the two insulating plates face each other. Therefore, the thin plate of the plate-shaped battery inserted in the slit is inserted. It is possible to prevent the thin plate-shaped electrode from being cut or damaged when the strip-shaped electrode is connected by sliding the insulating plate.

According to a third aspect of the present invention, in the electrode connecting structure for the plate-shaped battery according to the first or second aspect, a holding means is provided for holding the connected state in which the plurality of thin plate-shaped electrodes are overlapped with each other. It is characterized by being Here, as the holding means, a bolt provided to fasten the two insulating plates to each other, a protrusion provided on the surface of the insulating plate for pressing a contact portion of the thin plate-shaped electrode sandwiched between the two insulating plates, , Elastic members such as springs and rubber.

According to the invention of claim 3, claim 1
Alternatively, the same effect as that of the invention described in 2 is obtained, and since holding means for holding the connected state in which a plurality of thin plate-shaped electrodes are overlapped is provided, the thin plate-shaped electrodes of each plate-shaped battery are reliably connected. You can keep the condition.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings.

In each of the embodiments, as shown in FIGS. 1 to 3, a lithium ion secondary battery (plate-shaped) in which a power generating element is housed in a laminate sheet formed by coating both surfaces of a metal layer with a resin layer. A plurality of batteries 1 are stacked in the box 4 in an upright state and are connected in series to form a battery B.
Is configured. As will be described later, the box body 4 of the battery B
A slit 2 for connecting a plurality of thin plate-shaped electrodes (the positive electrode 11 or the negative electrode 12) of the lithium-ion secondary battery 1 in an overlapping state to the insulating plates 2 and 3 which are the lids.
1, 31 are formed. The insulating plates 2 and 3 and the box body 4 are made of an insulating material having a high thermal conductivity such as ceramics, and these are connected to a heat sink to generate heat from each lithium ion secondary battery 1. Is being dissipated.

[First Embodiment] In the present embodiment,
As shown in FIGS. 1, 4 and 5, two positive and negative electrodes 11 and 12 of the two lithium ion secondary batteries 1 adjacent to each other are formed in the slits 21 and 31 of the two insulating plates 2 and 3. And are inserted in layers. Then, one insulating plate 2 is slid with respect to the other insulating plate 3 so that one positive electrode 11 and the other negative electrode 12 of two lithium ion secondary batteries 1 adjacent to each other are placed between these two insulating plates. In, the connection state is such that they overlap each other.

As shown in FIGS. 4 and 5, the slits 21 and 31 formed in the insulating plates 2 and 3, respectively, have a surface 2 where these two insulating plates 2 and 3 face each other.
The opening edges 23 and 33 on the 2 and 23 side are rounded. Without this roundness, as shown in FIG. 5, one insulating plate 2 is slid with respect to the other insulating plate 3, and one positive electrode 11 and the other of the two lithium ion secondary batteries 1 are When the negative electrode 12 and the negative electrode 12 are connected to each other,
Thin plate electrodes 11 and 12 sandwiched between insulating plates 2 and 3
However, there is a possibility that the thin plate-shaped electrodes 11 and 12 may be damaged by bending at the corners of the opening edges of the slits 21 and 31.
By rounding the corners, the thin plate electrode 11,
12 turns smoothly.

[Second Embodiment] In the present embodiment,
As shown in FIG. 6, the insulating plates 2 and 3 are fastened to each other with bolts (holding means) 5 to ensure the connection performance of the thin plate electrodes 11 and 12 sandwiched between the insulating plates 2 and 3. . The bolt 5 may also serve to fix the insulating plates 2 and 3 to the box body 4 shown in FIG.

[Third Embodiment] In the present embodiment,
As shown in FIG. 7, at the positions of the contact surfaces of the thin plate-shaped electrodes 11 and 12 sandwiched between the insulating plates 2 and 3, the insulating plates 2 and 3 are formed with a convex portion 24 and a concave portion 34, respectively. Plates 2A and 3A are used. By increasing the contact area of the thin plate electrodes 11 and 12 sandwiched between the insulating plates 2A and 3A, the thin plate electrodes 11 and 12 are increased.
It is designed to improve the connection performance of. The convex portion 24 and the concave portion 34 are formed so as to have the same cross section in the width direction of the thin plate electrodes 11 and 12, and their surfaces are formed from smooth curves so as not to damage the thin plate electrodes 11 and 12. It is configured.

[Fourth Embodiment] In the present embodiment,
As shown in FIG. 8, a metal pin (holding means) 6 is inserted into the insulating plate 2 at the position of the contact surface of the thin plate electrodes 11 and 12 sandwiched between the insulating plates 2 and 3. Thin plate electrode 1 sandwiched between insulating plates 2 and 3
By pressing 1, 12 with the head of this pin 6,
The connection performance of the thin plate electrodes 11 and 12 is improved. The pins 6 project from the surface of the insulating plate 2 so that the potential of each thin plate electrode can be easily detected and connected to various circuits.

[Fifth Embodiment] In this embodiment, as shown in FIG. 9, a metal pin 6 is used in the fourth embodiment.
A spring (holding means) 7 is attached to the head of the. Thin plate electrode 1 sandwiched between insulating plates 2 and 3
By pressing the heads 1 and 12 with the head of the pin 6 and the spring 7, the connection performance of the thin plate electrodes 11 and 12 is further enhanced.

According to the electrode connection structure of the plate-shaped battery described in the first to fifth embodiments, the two insulating plates 2 (2
A), 3 (3A) slits 21 and 31 are aligned, and a plurality of thin plate-shaped electrodes 1 are fitted into these slits 21 and 31.
1 and 12 are overlapped and inserted, and one insulating plate 2 (2
A) is slid with respect to the other insulating plate 3 (3A) so that a plurality of thin plate electrodes 11 and 12 are connected to each other so that the two insulating plates 2 (2A) and 3 (3A) are overlapped with each other. Therefore, without processing the thin plate electrodes 11 and 12 of the lithium ion secondary battery 1,
The thin plate electrodes 11 and 12 of the lithium ion secondary battery 1 can be easily and reliably connected by the two insulating plates 2 (2A) and 3 (3A). Also, when the lithium ion secondary battery 1 is replaced, the two insulating plates 2
By sliding (2A) and 3 (3A) in the opposite direction,
A plurality of lithium ion secondary batteries 1 connected to each other
It is possible to easily remove the thin plate electrodes 11 and 12.

Further, the two insulating plates 2 (2A) and 3
Since the opening edges 23 and 33 of the slits 21 and 31 are rounded on the surfaces 22 and 32 facing each other (3A), the thin plate of the lithium-ion secondary battery 1 inserted into the slits 21 and 31 in an overlapping manner. The electrodes 11 and 12
It is possible to prevent the thin plate electrodes 11 and 12 from being cut or damaged when the insulating plates 2 (2A) and 3 (3A) are connected by sliding.

Further, according to the electrode connecting structure of the plate-shaped battery described in the second, fourth and fifth embodiments, the holding means for holding the connected state in which the plurality of thin plate-shaped electrodes 11 and 12 are overlapped with each other. Since the (bolts 5, pins 6, springs 7) are provided, the thin plate-shaped electrodes 11, 1 of each lithium-ion secondary battery 1 are provided.
It is possible to maintain the state where the two are securely connected.

The electrode connection structure for a plate-shaped battery of the present invention is not limited to the above-mentioned embodiments, and various modifications and design changes can be made without departing from the spirit of the present invention. good. For example, in each of the above-described embodiments, the lithium ion secondary battery (plate-shaped battery) 1 is connected in series, but the present invention is not limited to this, and when the plate-shaped batteries are connected in parallel. Needless to say, it is also applicable to the connection of the thin plate electrodes. In addition, it goes without saying that a specific detailed structure and the like can be appropriately changed.

[0025]

According to the first aspect of the present invention, the slits of the two insulating plates are aligned with each other, a plurality of thin plate-shaped electrodes are superposedly inserted into the slits, and one insulating plate is inserted into the other. Since the plurality of thin plate-shaped electrodes are in a connected state in which the two thin plate-shaped electrodes are overlapped with each other by sliding with respect to the insulating plate, the two thin plate-shaped electrodes of the plate-shaped battery can be processed without processing. The thin plate electrode of the plate battery can be easily and surely connected by the insulating plate. Also, when replacing the plate battery,
By sliding the two insulating plates in opposite directions, it is possible to easily remove the thin plate electrodes of the plurality of plate batteries connected to each other.

According to the invention of claim 2, claim 1
The effect similar to that of the invention described in 1) is obtained, and the opening edge of the slit is rounded on the surface side where the two insulating plates face each other. Therefore, the thin plate of the plate-shaped battery inserted in the slit is inserted. It is possible to prevent the thin plate-shaped electrode from being cut or damaged when the strip-shaped electrode is connected by sliding the insulating plate.

According to the invention of claim 3, claim 1
Alternatively, the same effect as that of the invention described in 2 is obtained, and since holding means for holding the connected state in which a plurality of thin plate-shaped electrodes are overlapped is provided, the thin plate-shaped electrodes of each plate-shaped battery are reliably connected. You can keep the condition.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of a battery configured by applying an electrode connection structure for a plate-shaped battery according to the present invention.

FIG. 2 is a perspective view showing an arrangement of plate-shaped batteries housed inside the battery shown in FIG.

FIG. 3 is a perspective view showing a state where thin plate electrodes of a plate battery housed inside the battery shown in FIG. 1 are connected by an insulating plate.

FIG. 4 is a cross-sectional view showing a state in which thin plate electrodes of a plate-shaped battery are connected by the electrode connection structure of the plate-shaped battery according to the present invention.

FIG. 5 is a cross-sectional view showing an example of an electrode connection structure for a plate-shaped battery according to the present invention.

FIG. 6 is a cross-sectional view showing an example of an electrode connection structure for a plate-shaped battery according to the present invention.

FIG. 7 is a cross-sectional view showing an example of an electrode connection structure for a plate-shaped battery according to the present invention.

FIG. 8 is a cross-sectional view showing an example of an electrode connection structure for a plate-shaped battery according to the present invention.

FIG. 9 is a cross-sectional view showing an example of an electrode connection structure for a plate-shaped battery according to the present invention.

[Explanation of symbols]

1 Plate battery (lithium ion secondary battery) 2 (2A), 3 (3A) Insulation plate 5 Holding means (bolt) 6 Holding means (pin) 7 Holding means (spring) 11 Thin plate electrode (positive electrode) 12 Thin plate electrode (negative electrode) 21,31 slits 22, 32 Insulation plates face each other 23,33 Opening edge

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Mitsuo Nakamura             1-7-2 Nishi-Shinjuku, Shinjuku-ku, Tokyo Fuji             Heavy Industry Co., Ltd. (72) Inventor Atsushi Namba             1-7-2 Nishi-Shinjuku, Shinjuku-ku, Tokyo Fuji             Heavy Industry Co., Ltd. (72) Inventor Takenori Hashimoto             1-7-2 Nishi-Shinjuku, Shinjuku-ku, Tokyo Fuji             Heavy Industry Co., Ltd. (72) Inventor Shingo Naruse             1-7-2 Nishi-Shinjuku, Shinjuku-ku, Tokyo Fuji             Heavy Industry Co., Ltd. F-term (reference) 5H022 AA19 BB03 CC09 KK04                 5H040 AA03 AA19 AA22 AS01 AS07                       AT06 DD03 JJ03

Claims (3)

[Claims] 1. An electrode connection structure for a plate-shaped battery having thin plate-shaped electrodes, wherein two slits of insulating plates each having a slit into which a plurality of thin plate-shaped electrodes can be inserted are aligned with each other. In this state, the plurality of thin plate-shaped electrodes are inserted into the slits in an overlapping manner, and the one insulating plate is slid with respect to the other insulating plate. An electrode connection structure for a plate-shaped battery, characterized in that the plates are in a connected state in which they overlap each other. 2. The electrode connection structure for a plate-shaped battery according to claim 1, wherein the slit has a rounded opening edge on the side where the two insulating plates face each other. 3. The electrode connection structure for a plate-shaped battery according to claim 1, further comprising holding means for holding a connection state in which the plurality of thin plate-shaped electrodes are overlapped with each other.