JP2003323873A - Connection structure of plate batteries - Google Patents

Abstract

(57) [Problem] To provide a connection structure of a plate-shaped battery capable of shortening a wiring distance of a lead wire and a bus bar when arranging a battery pack including the plate-shaped battery in a battery box. thing. SOLUTION: A plurality of lithium ion secondary batteries 1 (hereinafter abbreviated as plate batteries) constituting an assembled battery 2 are arranged in a battery box 3 provided with a positive electrode output part 3a and a negative electrode output part 3b on one surface 3c. I do. That is, the assembled battery 2 is configured by connecting the first assembled battery 2a and the second assembled battery 2b.
The electrode of the plate battery at one end and the electrode of the plate battery at the other end are
They are arranged so as to be located near the positive output section 3a and the negative output section 3b, respectively. At this time, the plate battery of the first assembled battery 2a and the plate battery of the second assembled battery 2b are
The width of the battery box 3 can also be reduced by arranging them so that they alternate from one surface 3c toward the surface 3d facing the one surface 3c.

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 connection structure in which an electric power generating element is enclosed in an exterior material such as a laminate sheet.

[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.
On the other hand, a plate-shaped lithium-ion secondary battery has been developed, which is a laminate sheet in which both sides of a metal layer are covered with a resin layer as an exterior material, and a power generating element is enclosed in the exterior sheet, which can be repeatedly used.

[0004]

In order to obtain a high voltage using the above-mentioned plate-shaped lithium ion secondary battery, it is necessary to connect a plurality of plate-shaped batteries in series or in parallel. Generally, for example, as shown in FIG. 3, a plurality of plate-shaped batteries 101 are stacked in a battery box 103 from one surface 103c thereof toward a surface 103d opposite to the one surface 103c,
The assembled battery 102 is configured by connecting the electrodes of each plate-shaped battery 101 in series or in parallel. By the way, the assembled battery 102
The positive electrode output part 103a and the negative electrode output part 103b for taking out electric power from the battery box 103 are generally provided on the one surface 103c of the battery box 103 for reasons such as electric power supply. Therefore, for example, in FIG. 3, the negative terminal of the plate-shaped battery 101 located at the end of the surface 103d opposite to the one surface 103c has a length equal to the total thickness of the plurality of plate-shaped batteries 101 and a conductor 104b or a bus.・ Depending on the bar, negative electrode output section 1
It is necessary to connect to 03b. However, if the conductor 104b and the bus bar are wired as described above, power loss due to the resistance of the conductor and an increase in the weight of the bus bar will occur.

SUMMARY OF THE INVENTION An object of the present invention is to provide a plate-shaped battery connection structure that can shorten the wiring distance of a conductor wire or a bus bar in an assembled battery composed of the plate-shaped batteries as described above. .

[0006]

In order to solve the above problems, the invention according to claim 1 stores an assembled battery composed of a plurality of plate-shaped batteries in a battery box, and one surface of the battery box is provided. A structure is provided in which the electrodes of the plate-shaped battery at one end and the electrodes of the plate-shaped battery at the other end that constitute the assembled battery are respectively connected to the provided positive and negative output parts, and the assembled battery is divided into a plurality of groups. , An electrode of the plate-shaped battery at one end that constitutes one assembled battery group and an electrode of the plate-shaped battery at one end that constitutes another assembled battery group are arranged in the vicinity of the output section, and between the assembled battery groups. It is characterized by connecting electrodes.

According to the first aspect of the invention, among the assembled batteries divided into a plurality of groups, the electrode of the plate-shaped battery at one end forming one assembled battery group and the one end forming another assembled battery group The electrode of the plate battery is located near the output parts of the positive electrode and the negative electrode provided on one surface of the battery box.
Therefore, in the battery box, by connecting the electrode of the plate-shaped battery at one end constituting one assembled battery group and the electrode of the plate-shaped battery at one end constituting the other assembled battery group to the output section, respectively. , The conductors and bus bars for them can be made extremely short. Therefore, it is possible to reduce the power loss due to the resistance of the conductor and to suppress the weight increase due to the bus bar.

According to a second aspect of the present invention, in the plate-shaped battery connection structure according to the first aspect, the plate-shaped batteries that form the first assembled battery group and the plate-shaped batteries that form the second assembled battery group. The battery and the battery are alternately arranged with the respective electrodes facing to the opposite side.

According to the second aspect of the present invention, in the battery box, the plate-like batteries forming the first assembled battery group and the plate-like batteries forming the second assembled battery group have respective electrodes. Since they are alternately arranged toward the opposite side, the storage space is saved and the width of the battery box can be kept small.

[0010]

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 following embodiments, as shown in FIGS. 1 and 2, a lithium ion secondary battery 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 plate-shaped batteries 1) are connected in series to form an assembled battery. The plate-shaped battery having a laminate sheet as an exterior material is designed to be lighter and thinner than a conventional plate-shaped battery having a metal case as an exterior material.

[First Embodiment] In the present embodiment, as shown in FIG. 1, a plurality of lithium-ion secondary batteries 1 constituting an assembled battery 2 include a positive electrode output part 3a and a negative electrode output part 3b. Are arranged in a battery box 3 including

The battery box 3 is provided with a positive electrode output portion 3a and a negative electrode output portion 3b on one surface 3c thereof. Examples of the constituent material of the battery box 3 include, but are not limited to, metal, wood, plastic, resin and the like.

The assembled battery 2 is composed of a first assembled battery 2a and a second assembled battery 2b connected in series, and each of the first assembled battery 2a and the second assembled battery 2b is a plurality of batteries. The lithium ion secondary battery 1 is stacked in the thickness direction,
Adjacent lithium ion secondary batteries 1 are connected in series.

Each lithium ion secondary battery 1 is provided with a leaf spring-shaped positive electrode terminal (electrode) 1a and a negative electrode terminal (electrode) 1b protruding upward. The leaf spring-shaped positive electrode terminal 1a or negative electrode terminal 1b of each lithium ion secondary battery 1 is
The positive electrode terminal 1a or the negative electrode terminal 1b having a leaf spring shape of the lithium ion secondary battery 1 adjacent to the lithium ion secondary battery 1 is biased and connected by a spring force. The positive electrode terminal 1a of the adjacent lithium ion secondary battery 1
The negative electrode terminal 1b and the negative electrode terminal 1b may be connected by a conductive wire (not shown).

The first assembled battery 2a and the second assembled battery 2b are arranged in parallel in the battery box 3 from one surface 3c thereof to a surface 3d facing the one surface 3c. The positive electrode terminal 1a of the lithium ion secondary battery 1 located at one end of the first assembled battery 2a is located near the positive electrode output portion 3a on the one surface 3c of the battery box 3. Further, the negative electrode terminal 1b of the lithium ion secondary battery 1 located at one end of the second assembled battery 2b is located near the negative electrode output portion 3b.

Then, the positive electrode terminal 1a of the lithium ion secondary battery 1 located at the one end of the first assembled battery 2a and the positive electrode output portion 3a are connected by a conductive wire 4a. Further, the negative electrode terminal 1b of the lithium-ion secondary battery 1 located at the one end of the second assembled battery 2b and the negative electrode output part 3b are connected by a lead wire 4b. The conductors 4a, 4b
May be a bus bar.

Further, the negative electrode terminal 1b of the lithium ion secondary battery 1 located at the other end of the first assembled battery 2a and the lithium ion secondary battery 1 located at the other end of the second assembled battery 2b.
Is connected to the positive electrode terminal 1a of the above by a conducting wire 4c.
The conductor 4c may be a bus bar.

[Second Embodiment] As shown in FIG. 2, the present embodiment has a configuration similar to that of [first embodiment], and the same configuration as that of [first embodiment] is the same. The reference numerals are given and the description is omitted.

That is, also in this embodiment, the positive electrode output portion 3a and the negative electrode output portion 3 are provided on the one surface 3c of the battery box 3.
b and are provided. And [first embodiment]
Similarly to the above, the assembled battery 2 is configured by connecting the first assembled battery 2a and the second assembled battery 2b in series. These first assembled battery 2
The a and the second assembled battery 2b are each configured by stacking a plurality of lithium ion secondary batteries 1 in the thickness direction and connecting adjacent lithium ion secondary batteries 1 in series.

In this embodiment, the first assembled battery 2
The lithium ion secondary battery 1 of a and the lithium ion secondary battery 1 of the second assembled battery 2b are arranged in the battery box 3 from one surface 3c thereof toward a surface 3d facing the one surface 3c.
The positive electrode terminals 1a and the negative electrode terminals 1b are arranged so as to be alternately overlapped so as to face the opposite sides. Then, the first assembled battery 2 is provided near the one surface 3c of the battery box 3.
Both the positive electrode terminal 1a of the lithium ion secondary battery 1 located at one end of a and the negative electrode terminal 1b of the lithium ion secondary battery 1 located at one end of the second assembled battery 2b are located. Further, the lithium ion secondary battery 1 of the first assembled battery 2a and the lithium ion secondary battery 1 of the second assembled battery 2b are arranged alternately so that the storage space is saved and the battery box is reduced. The width of 3 can be kept small.

According to the first and second embodiments, 2
Among the assembled batteries 2 divided into two groups, the positive electrode terminal 1a of the lithium ion secondary battery 1 at one end of the first assembled battery 2a
Is located near the positive electrode output portion 3a. Further, the negative electrode terminal 1b of the lithium ion secondary battery 1 at one end of the second assembled battery 2b is located near the negative electrode output portion 3b. Therefore, the positive electrode terminal 1a of the lithium ion secondary battery 1 at one end of the first assembled battery 2a and the negative electrode terminal 1b of the lithium ion secondary battery 1 at one end of the second assembled battery 2b are respectively connected to the positive electrode output portion 3a. By connecting to the negative electrode output section 3b, the conductors 4a to 4c and the bus bar for them can be made extremely short. Therefore, it is possible to reduce the power loss due to the resistance of the conductor and to suppress the weight increase due to the bus bar.

According to the second embodiment, the battery box 3 includes the lithium ion secondary battery 1 of the first assembled battery 2a.
And the lithium-ion secondary battery 1 of the second assembled battery 2b,
Since the positive electrode terminals 1a and the negative electrode terminals 1b are alternately arranged so as to face the opposite side, the storage space is saved and the width of the battery box 3 can be suppressed to be small.

The present invention is not limited to the above-described embodiments, and various improvements and design changes may be made without departing from the spirit of the present invention. For example, in each of the above embodiments, the lithium ion secondary battery 1 is described as an example of the plate battery, but any plate battery such as the lithium ion secondary battery 1 may be used. Good.

Further, in each of the above embodiments, the lithium ion secondary batteries 1 are connected in series, but the present invention is not limited to this, and it is also possible to connect plate batteries in parallel. Applicable. In addition, it goes without saying that a specific detailed structure and the like can be appropriately changed.

[0026]

According to the first aspect of the invention, in the battery box, the electrode of the plate-shaped battery at one end that constitutes one assembled battery group and the plate-shaped battery at one end that constitutes another assembled battery group By connecting each of the electrodes to the output section, the conductor wire and bus bar for them can be made extremely short. Therefore, it is possible to reduce the power loss due to the resistance of the conductor and to suppress the weight increase due to the bus bar.

According to the invention of claim 2, claim 1
Of course, the same effects as those of the invention described in (1) above can be obtained, and in the battery box, the plate-shaped batteries forming the first assembled battery group and the plate-shaped batteries forming the second assembled battery group are provided. , The electrodes are alternately arranged so as to face the opposite side, so that the storage space can be saved and the width of the battery box can be reduced.

[Brief description of drawings]

FIG. 1 is a perspective view and FIG. 1B is a schematic view showing an embodiment of a plate-shaped battery connection structure according to the present invention.

FIG. 2 is a perspective view showing an example of an embodiment of a connection structure for a plate-shaped battery according to the present invention.

FIG. 3 is a perspective view and (b) is a schematic view showing an example of a conventional connecting structure for a plate-shaped battery.

[Explanation of symbols]

1 Lithium-ion secondary battery (plate-shaped battery) 1a Positive electrode terminal (electrode) 1b Negative electrode terminal (electrode) 2 batteries 2a First battery pack 2b Second battery pack 3 battery box 3a Positive output part 3b Negative electrode output section 3c One side 3d surface facing one surface 4a lead wire 4b lead wire 4c conductor

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Mitsunori Ishii             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) 5H029 AJ06 BJ04 BJ06 BJ23 DJ02                       DJ05 EJ01                 5H040 AA19 AA22 AS07 AT04 AT06                       AY05 DD03 DD05 LL01

Claims (2)

[Claims] 1. An assembled battery composed of a plurality of plate-shaped batteries is housed in a battery box, and an electrode of a plate-shaped battery at one end of the assembled battery is provided at positive and negative output parts provided on one surface of the battery box. And a plate-shaped battery electrode at the other end are respectively connected, and the assembled battery is divided into a plurality of groups, and one plate-shaped battery electrode at one end and another assembled battery group that constitutes one assembled battery group And a plate-shaped battery electrode at one end constituting the above-mentioned battery is arranged in the vicinity of the output part to connect electrodes between the assembled battery groups. 2. A plate-shaped battery forming a first assembled battery group and a plate-shaped battery forming a second assembled battery group are alternately arranged with their electrodes facing opposite sides. The plate-shaped battery connection structure according to claim 1.