JP2003045409A - Power source device - Google Patents

Power source device

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Publication number
JP2003045409A
JP2003045409A JP2001232006A JP2001232006A JP2003045409A JP 2003045409 A JP2003045409 A JP 2003045409A JP 2001232006 A JP2001232006 A JP 2001232006A JP 2001232006 A JP2001232006 A JP 2001232006A JP 2003045409 A JP2003045409 A JP 2003045409A
Authority
JP
Japan
Prior art keywords
negative electrode
positive electrode
connecting portion
battery
conductor layer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP2001232006A
Other languages
Japanese (ja)
Other versions
JP4001730B2 (en
Inventor
Tomohiro Ikeda
Satoki Masuda
Sakai Yagi
境 八木
悟己 増田
智洋 池田
Original Assignee
Yazaki Corp
矢崎総業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Yazaki Corp, 矢崎総業株式会社 filed Critical Yazaki Corp
Priority to JP2001232006A priority Critical patent/JP4001730B2/en
Publication of JP2003045409A publication Critical patent/JP2003045409A/en
Application granted granted Critical
Publication of JP4001730B2 publication Critical patent/JP4001730B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage
    • Y02E60/12Battery technologies with an indirect contribution to GHG emissions mitigation

Abstract

(57) [Problem] To provide a power supply device capable of suppressing size reduction and cost increase. A power supply device includes a battery assembly and a measurement unit. The battery assembly 2 includes a plurality of batteries 4. The battery 4 has a positive electrode 6 and a negative electrode 7. The battery 4 is stacked with the positive electrode 6 and the negative electrode 7 alternately reversed. The positive electrode 6 and the negative electrode 7 adjacent to each other are
And the plurality of batteries 4 are connected in series. The measurement section 3 includes an FPC 10. The FPC 10 includes a conductive conductor layer 14 and first and second insulating layers 15 and 16.
It has. The FPC 10 has a positive electrode connecting portion 18 on one edge 17a and a negative electrode connecting portion 19 on the other edge 17b.
Is provided. The positive electrode connecting portion 18 is connected to the positive electrode 6 of the battery 4 and the negative electrode connecting portion 19 is connected to the negative electrode 7 of the battery 4,
C10 is attached to the battery assembly 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply device which is obtained by connecting a plurality of batteries in series and which is mounted on a hybrid vehicle or an electric vehicle which can be driven by the power of both an internal combustion engine and an electric motor.

[0002]

2. Description of the Related Art A hybrid vehicle, an electric vehicle, or the like, which can be driven by the power of both an internal combustion engine and an electric motor, is equipped with a power supply device 100 shown in FIG. 4, for example. The power supply device 100 illustrated in FIG. 4 includes a plurality of batteries 101, an inner case 102, a plurality of bus bars 109 set in the inner case 102, and an electrode cover 104.

The battery 101 has a positive electrode (hereinafter referred to as a positive electrode) 105 at one end and a negative electrode (hereinafter referred to as a negative electrode) 106 at the other end. The battery 101 is stacked such that the positive electrode 105 and the negative electrode 106 are adjacent to each other. In the batteries 101 adjacent to each other, the positive electrode 105 and the negative electrode 106 are adjacent to each other. That is,
The plurality of batteries 101 are stacked in a state where the positive electrodes 105 and the negative electrodes 106 are alternately arranged in opposite directions.

The inner case 102 is attached to the ends of the batteries 101 that are stacked on each other. The inner case 102 houses a plurality of voltage detection terminals 107. An electric wire 108 is connected to the voltage detection terminal 107. The voltage detection terminals 107 are attached to every other positive electrode 105 or negative electrode 106 along the direction in which the batteries 101 are arranged. A plurality of bus bars 109 are attached to the inner case 102.

The bus bar 109 has positive electrodes 10 adjacent to each other.
5 and the negative electrode 106 are connected, and the batteries 101 are connected in series with each other. The electrode cover 104 is made of insulating synthetic resin and is attached to the inner case 102. The electrode cover 104 covers the positive electrode 105, the negative electrode 106, the above-mentioned bus bar 109, and the like. Power supply device 100 having the configuration described above
Measures the potential difference between the positive electrode 105 and the negative electrode 106 of each battery 101 via the voltage detection terminal 107 and the electric wire 108 attached to the voltage detection terminal 107.

[0006]

In the above-described conventional power supply device 100, the voltage detection terminal 107 is arranged between the inner case 102 and the outer case 103, and
An electric wire 108 connected to the voltage detection terminal 107 is arranged. Therefore, when assembling the conventional power supply device 100, the electric wire 108 is connected to the inner case 102 and the electrode cover 104.
It was necessary to route it between

Further, it is necessary to attach the voltage detection terminal 107 to the desired positive electrode 105 and negative electrode 106.
Therefore, the number of steps for assembling is increased, and the cost is soared. Furthermore, the inner case 102 and the electrode cover 1
It was necessary to secure a space for arranging the above-mentioned electric wire 108 between the terminal 04 and the like. Therefore, the power supply device 100
The size itself tended to increase.

[0008] Therefore, an object of the present invention is to provide a power supply device which can be miniaturized and can suppress a cost increase.

[0009]

In order to solve the problems and achieve the object, a power supply device according to the present invention is a battery having a positive electrode at one end and a negative electrode at the other end. In a power supply device provided with a plurality of battery assembly, and a measuring unit for measuring the potential difference between the positive electrode and the negative electrode of each battery constituting the battery assembly, the measuring unit,
A flat circuit body having a conductor layer, a first insulating layer laminated on one surface of the conductor layer, and a second insulating layer laminated on the other surface of the conductor layer; The circuit body is characterized by including a positive electrode connecting portion connecting the conductor layer and the positive electrode, and a negative electrode connecting portion connecting the conductor layer and the negative electrode.

According to a second aspect of the power source device of the present invention, in the power source device according to the first aspect, both surfaces of the conductor layer are exposed at the positive electrode connecting portion and the negative electrode connecting portion. It has a feature.

According to a third aspect of the power source device of the present invention, in the power source device according to the first or second aspect, each of the batteries has a rectangular battery body, and the positive electrode and Negative electrodes are parallel to each other and project in the same direction from one end face of the battery body, the flat circuit body is overlaid on the one end face, the positive electrode connecting portion is attached to the positive electrode, and The negative electrode connecting portion is attached to the negative electrode.

According to a fourth aspect of the present invention, there is provided the power supply device according to any one of the first to third aspects, wherein the batteries are arranged along one direction and the one direction. A positive electrode of one battery located at one end of the battery and a negative electrode of the other battery located at the other end in the one direction are connected by a connecting member between the positive electrode and the negative electrode adjacent to each other. Connected, the batteries are connected in series with each other, the positive electrode connecting portion is arranged in one edge of the flat circuit body along the one direction and overlaps all of the one edge. The negative electrode connecting portions are provided corresponding to the respective positive electrodes, and all the negative electrode connecting portions are arranged on the other edge portion of the flat circuit body along the one direction and overlap with the other edge portion. Provided corresponding to each electrode It is characterized in that there.

According to the present invention described in claim 1, the measuring means for measuring the potential difference between the positive electrode and the negative electrode of each battery is provided with a flat circuit body. The flat circuit body has a positive electrode connecting portion and a negative electrode connecting portion. The positive circuit connection part can be attached to the positive electrode, the negative electrode connection part can be attached to the negative electrode, and the flat circuit body can be attached to the battery assembly.

According to the second aspect of the present invention, the surface of the conductor layer is exposed at the positive electrode connecting portion and the negative electrode connecting portion. Therefore, the conductor layer can be reliably connected to the positive electrode at the positive electrode connecting portion, and the conductor layer can be surely connected to the negative electrode at the negative electrode connecting portion.

According to the present invention as set forth in claim 3, the positive electrode and the negative electrode project from the battery body in the same direction. The flat circuit body is attached so as to be stacked on one end surface of the battery body. Therefore, the flat circuit body is attached to the battery assembly without bending the conductor layer.

According to the present invention as set forth in claim 4, the positive electrode connecting portion is provided corresponding to all the positive electrodes provided on one edge of the flat circuit body and overlapping with the one edge. Has been. The negative electrode connecting portion is provided on the other edge portion of the flat circuit body and is provided corresponding to all the negative electrodes overlapping with the other edge portion. Therefore, the potential difference between the positive electrode and the negative electrode of each battery is measured by measuring the potential difference between the positive electrode connecting portion and the negative electrode connecting portion that face each other along the direction intersecting the one direction in which the batteries are arranged. You can measure reliably.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A power supply device according to an embodiment of the present invention will be described with reference to FIGS. The power supply device 1 shown in FIG. 1 is mounted on a hybrid vehicle that can be driven by the driving force of both the internal combustion engine and the electric motor, or an electric vehicle that can be driven by the driving force of the electric motor.

As shown in FIG. 1, the power supply device 1 includes a battery assembly 2 and a measuring unit 3 as a measuring means for measuring a potential difference between a positive electrode 6 and a negative electrode 7 of each battery 4 described later. I have it. The battery assembly 2 includes a plurality of batteries 4. The battery 4 includes a rectangular battery body 5, a positive electrode (hereinafter referred to as a positive electrode) 6, a negative electrode (hereinafter referred to as a negative electrode) 7,
Is equipped with.

The positive electrode 6 is provided at one end of the battery body 5. The negative electrode 7 is provided on the other end of the battery body 5.
The positive electrode 6 and the negative electrode 7 are formed in a rod shape and protrude in the same direction from one end face (hereinafter referred to as one end face, shown in FIG. 3 and the like) 8 of the battery body 5. The positive electrode 6 and the negative electrode 7 are parallel to each other and have thread grooves formed on the outer peripheral surface.

The plurality of batteries 4 are arranged in one direction (arrow H in FIG. 1) with the positive electrode 6 and the negative electrode 7 being adjacent to each other and the one end faces 8 being on the same plane. ing. In the batteries 4 adjacent to each other, the positive electrode 6 and the negative electrode 7 are adjacent to each other. That is, the plurality of batteries 4
The positive electrode 6 and the negative electrode 7 are stacked in a state in which they are alternately opposite to each other.

The measuring section 3 includes a measuring section body 9 and a flexible printed circuit (Flexib) as a flat circuit body.
le Printed Circuit: hereinafter referred to as FPC) 10. The flat circuit body described in this specification is
A flat conductor is shown, including a conductor and an insulator covering the conductor. The measuring unit main body 9 is made of insulating synthetic resin and is formed in a plate shape. Electrode through holes 11 (shown in FIG. 3 and the like) through which the positive electrode 6 and the negative electrode 7 of each battery 4 arranged as described above can pass are formed in the measurement portion main body 9.

The measuring portion main body 9 is placed on the one end face 8 of the battery 4 constituting the battery assembly 2 by passing the positive electrode 6 and the negative electrode 7 through the electrode through hole 11. When the measuring unit main body 9 is placed on the one end surface 8, the surface 9a is exposed to the outside.
In addition, a plurality of bus bar accommodating chambers 12 are provided. The bus bar accommodating chamber 12 is formed by a plurality of partition walls 13 standing from the surface 9a. An electrode through hole 11 for passing one positive electrode 6 and an electrode through hole 11 for passing one negative electrode 7 are opened in the bus bar housing chamber 12. That is, the positive electrode 6 and the negative electrode 7 of the batteries 4 adjacent to each other enter the bus bar housing chamber 12 through the electrode through holes 11.

The bus bar accommodating chamber 12 has a positive electrode 6 (hereinafter referred to as reference numeral 6a) of one battery 4 (hereinafter referred to as reference numeral 4a) located at one end of the plurality of batteries 4 arranged along the one direction H.
And the other battery 4 located at the other end.
It is arranged at a position excluding the position where it overlaps with the negative electrode 7 (indicated by reference numeral 4b below) (indicated by reference numeral 7a below).

The FPC 10 has a thin conductor layer 14 made of a conductive metal such as copper, as shown in FIG.
It comprises a thin first insulating layer 15 laminated on one surface of the conductor layer 14 and a thin second insulating layer 16 laminated on the other surface of the conductor layer 14. In addition, the FPC 10
As shown in FIGS. 1 and 2, the circuit body main body 17 has a substantially rectangular planar shape, a positive electrode connecting portion 18, and a negative electrode connecting portion 19. The circuit body 17 includes the conductor layer 14 and the first
The insulating layer 15 and the second insulating layer 16 are laminated on each other.

The positive electrode connecting portion 18 is the circuit body 17 or F.
The one edge 17a located on the front side in FIG. 1 of the PC 10 is arranged along the one direction H. Positive electrode connecting portion 18
2 protrudes outward from the one edge 17a of the circuit body 17 as shown in FIG.
The positive electrode connecting portion 18 is arranged at a position overlapping with all the positive electrodes 6 of the battery 4 overlapping with the one edge portion 17a. A positive electrode through hole 20 through which the positive electrode 6 can pass is opened in the positive electrode connecting portion 18. The conductor layer 14 is exposed around the positive electrode through hole 20 over the entire circumference of the positive electrode through hole 20.

As shown in FIGS. 2 and 3, a circular hole 21 is formed in the first insulating layer 15 on the back surface side of the positive electrode connecting portion 18 facing the battery 4. The circular hole 21 is the positive electrode through hole 2
Greater than zero. The seat (root) 27 of the positive electrode 6 penetrates into the round hole 21. The seat 27 of the positive electrode 6 contacts the conductor layer 14. On the surface side of the positive electrode connecting portion 18, the second insulating layer 1
6 has been removed. When a bus bar 22 described later overlaps the positive electrode connecting portion 18, the bus bar 22 contacts the conductor layer 14. Thus, in the positive electrode connecting portion 18, both surfaces of the conductor layer 14 are exposed.

The negative electrode connecting portion 19 is the circuit body 17 or F.
It is arranged along the one direction H on the other edge 17b of the PC 10 located on the far side in FIG. Negative electrode connection portion 19
2 protrudes outward from the other edge 17b of the circuit body 17 as shown in FIG.
The negative electrode connecting portion 19 is arranged at a position overlapping with each of all the negative electrodes 7 of the battery 4 overlapping with the other edge portion 17b. The negative electrode connecting portion 19 has a negative electrode through hole 23 through which the negative electrode 7 can pass. The conductor layer 14 is exposed around the negative electrode through hole 23 over the entire circumference of the negative electrode through hole 23.

As shown in FIGS. 2 and 3, a round hole 24 is formed in the first insulating layer 15 on the back surface side of the negative electrode connecting portion 19 facing the battery 4. The round hole 24 is the negative electrode through hole 2
Greater than 3. The seat 27 of the negative electrode 7 penetrates into the round hole 24. The seat 27 of the negative electrode 7 contacts the conductor layer 14. The second insulating layer 16 is removed from the surface side of the negative electrode connecting portion 19. When the bus bar 22 overlaps with the negative electrode connecting portion 19, the bus bar 22 contacts the conductor layer 14. Thus, both surfaces of the conductor layer 14 are exposed at the negative electrode connecting portion 19.

The power supply device 1 also includes a bus bar 22 as a connecting member. The bus bar 22 is made of a conductive metal and is formed in a strip plate shape. Bus bar 22
Are housed in the bus bar housing chamber 12. The bus bar 22 is
A pair of holes 25 through which the positive electrode 6 and the negative electrode 7 can pass are provided.

A plurality of batteries 4 are stacked so that the positive electrode 6 and the negative electrode 7 are adjacent to each other. Then, the positive electrode 6 and the negative electrode 7 are inserted into the electrode through holes 11 so that the measuring unit main body 9 is attached to the battery 4
On one end face 8. Then, the positive electrode 6 is passed through the positive electrode through hole 20 of the positive electrode connecting portion 18 and the negative electrode 7 is passed through the negative electrode connecting portion 19, and the FPC 10 is further stacked on the measuring portion main body 9.
In this way, the FPC 10 is superposed on the one end face 8 via the measuring section main body 9.

A positive electrode 6 and a negative electrode 7 adjacent to each other in the hole 25.
A bus bar 22 is further stacked on the FPC 10 so that the FPC 10 can be passed through and is housed in the bus bar housing chamber 12. That is,
The FPC 10 is sandwiched between the seat 27 and the bus bar 22. The FPC 10 is placed below the bus bar 22 in FIG. Then, a nut 26 or the like is screwed into the outer periphery of each of the positive electrode 6 and the negative electrode 7, and the battery 4, the measurement unit main body 9, the FPC 10 are connected.
Then, the bus bar 22 is fixed, and the power supply device 1 having the above-described configuration is assembled.

Thus, the positive electrode connecting portion 18 and the negative electrode connecting portion 1
As shown in FIG. 3, the conductor layer 1 is provided at a position where the conductor layer 1 is provided.
4 and the bus bar 22 overlaps. Therefore, the conductor layer 14 and the bus bar 22 are electrically connected to each other. Further, the conductor layer 14 of the positive electrode connecting portion 18 overlaps with the positive electrode 6 and the conductor layer 14 of the negative electrode connecting portion 19 overlaps with the negative electrode 7. Therefore, the positive electrode 6 and the negative electrode 7 are electrically connected to the bus bar 22 via the conductor layer 14 at the locations where the positive electrode connecting portion 18 and the negative electrode connecting portion 19 are provided.

Further, the positive electrode connecting portion 18 and the negative electrode connecting portion 19
The bus bar 22 directly overlaps with the positive electrode 6 or the negative electrode 7 at a position where is not provided. Therefore, in a place where the positive electrode connecting portion 18 and the negative electrode connecting portion 19 are not provided,
Of course, the positive electrode 6 and the negative electrode 7 are electrically connected to the bus bar 22.

Therefore, except for the positive electrode 6a of one battery 4a located at one end in the one direction H and the negative electrode 7a of the other battery 4b located at the other end in the one direction H, the bus bar 22 is used. The positive electrode 6 and the negative electrode 7 adjacent to each other are electrically connected. Then, the batteries 4 are electrically connected to each other in series.

Further, as shown in FIG. 3, the conductor layer 14 of the positive electrode connecting portion 18 overlaps with the positive electrode 6 and the conductor layer 14 of the negative electrode connecting portion 19 overlaps with the negative electrode 7. Then, the conductor layer 14 of the FPC 10 is electrically connected to each of the positive electrode 6 and the negative electrode 7. In addition, the conductor layer 14 of the FPC 10 is not shown by E
It is electrically connected to a CU (Electronic Control Unit). The conductor layer 14 allows the measuring unit 3 to measure the potential difference between the positive electrode 6 and the negative electrode 7 of each battery 4. In this way, the measuring unit 3 can measure the remaining amount of each battery 4 and the like.

According to this embodiment, the positive electrode connecting portion 18 is connected to the positive electrode 6 and the negative electrode connecting portion 19 is connected to the negative electrode 7,
The FPC 10 is attached to the battery assembly 2. FPC1 in which the positive electrode connecting portion 18 and the negative electrode connecting portion 19 are integrally formed
When 0 is attached to the battery assembly 2, the measuring unit 3 can measure the potential difference between the positive electrode 6 and the negative electrode 7 of each battery 4.

Therefore, the positive electrode 6 and the negative electrode 7 of each battery 4 are
Therefore, it is possible to suppress the time and effort required to electrically connect the positive electrode 6 and the negative electrode 7 to the measuring unit 3 so that the potential difference between the measuring unit 3 and the positive electrode 6 can be measured. Therefore, the number of steps required for assembling the power supply device 1 can be suppressed, and the cost increase of the power supply device 1 can be suppressed.

Further, the measuring unit 3 uses the FPC 10 and
The positive electrode 6 and the negative electrode 7 are electrically connected. Therefore, the mechanical size of the measuring unit 3 can be suppressed. Therefore, the power supply device 1 can be downsized.

In the positive electrode connecting portion 18 and the negative electrode connecting portion 19, both surfaces of the conductor layer 14 are exposed. Therefore, in the positive electrode connecting portion 18, the conductor layer 14 can be reliably electrically connected to the positive electrode 6. In the negative electrode connecting portion 19, the conductor layer 14 can be reliably electrically connected to the negative electrode 7. Therefore, the FPC 10 can be reliably electrically connected to both the positive electrode 6 and the negative electrode 7, and the measuring unit 3 can reliably measure the potential difference between the positive electrode 6 and the negative electrode 7 of each battery 4.

The positive electrode 6 and the negative electrode 7 project from one end face 8 of the battery body 5. The FPC 10 is attached to the battery assembly 2 by being stacked on the one end surface 8. Therefore, the FPC 10 is attached to the battery assembly 2 without bending the conductor layer 14. Therefore, the conductor layer 14 of the FPC 10 can be prevented from being broken, and the measuring unit 3 can reliably measure the potential difference between the positive electrode 6 and the negative electrode 7 of each battery 4.

The positive electrode connecting portion 18 is provided on one edge 17a of the FPC 10 and is provided corresponding to all the positive electrodes 6 overlapping the one edge 17a. Negative electrode connection part 1
9 is provided corresponding to all the negative electrodes 7 provided on the other edge 17b of the FPC 10 and overlapping with the other edge 17b.

For this reason, the potential difference between the positive electrode 6 and the negative electrode 7 of each battery 4 is measured by measuring the potential difference between the positive electrode connecting portion 18 and the negative electrode connecting portion 19 which are opposed to each other along the direction intersecting the one direction H. Can be measured reliably. Therefore, the measurement unit 3 can reliably measure the potential difference between the positive electrode 6 and the negative electrode 7 of each battery 4.

Further, as shown in FIG. 3, the positive electrode connecting portion 18
At the location where the negative electrode connection portion 19 and the negative electrode connection portion 19 are provided, the conductor layer 1
4 is overlaid with the bus bar 22 and the conductor layer 14 is overlaid with the positive electrode 6 or the negative electrode 7. Therefore, neither the first insulating layer 15 nor the second insulating layer 16 made of synthetic resin or the like is sandwiched between the nut 26 and the one end surface 8 of the battery 4. Therefore, even when the nut 26 is screwed into the positive electrode 6 and the negative electrode 7, both the first insulating layer 15 and the second insulating layer 16 do not deform in the direction of decreasing the thickness.

Therefore, the first insulating layer 15 and the second insulating layer 15
The insulating layer 16 is deformed in a direction in which the thickness of the insulating layer 16 becomes thinner, and the nut 26 is used to connect the bus bar 22, the conductor layer 14, and the battery 4.
It is possible to surely prevent the force for bringing the one end surface 8 and the one end surface 8 closer to each other from weakening. Therefore, the conductor layer 14 and the positive electrode 6 or the negative electrode 7 can be reliably electrically connected, and the bus bar 22 and the positive electrode 6 or the negative electrode 7 can be reliably electrically connected.

In the above-described embodiment, the FPC 10 is used as the flat circuit body. However, in the present invention, it goes without saying that a flexible flat cable (FFC) may be used as the flat circuit body.

Further, the FPC 10 may be equipped with a control unit or the like for controlling the voltages of the plurality of batteries 4 evenly. In this case, the equalized voltage is
Is output toward.

Further, in this embodiment, the FPC 10 is installed in the seat 2
It is sandwiched between 7 and bus bar 22. That is, the FPC 10
Are stacked below the bus bar 22 in FIG. However, in the present invention, the FPC 10 is provided with the nut 26 and the bus bar 22.
You can put it between and. That is, the FPC 10 is connected to the bus bar 22.
The upper part of FIG. Of course, in this case, FPC10
The conductor layer 14 and the electrodes 6 and 7 are surely electrically connected.

[0048]

As described above, according to the present invention as set forth in claim 1, the measuring means for measuring the potential difference between the positive electrode and the negative electrode of each battery is provided with the flat circuit body. The flat circuit body has a positive electrode connecting portion and a negative electrode connecting portion. Attach the positive electrode connection to the positive electrode,
The negative electrode connection part can be attached to the negative electrode to attach the flat circuit body to the battery assembly.

Therefore, when the flat circuit body is attached, the potential difference between the positive electrode and the negative electrode of each battery can be measured. Therefore, it is possible to suppress the number of man-hours required to attach the measuring means, and it is possible to suppress the cost increase. Further, since the flat circuit body is used, the mechanical size of the measuring means can be reduced. Therefore, the size of the power supply device can be reduced.

According to the second aspect of the present invention, both surfaces of the conductor layer are exposed at the positive electrode connecting portion and the negative electrode connecting portion. Therefore, the conductor layer can be reliably connected to the positive electrode at the positive electrode connecting portion, and the conductor layer can be surely connected to the negative electrode at the negative electrode connecting portion. Therefore, in addition to miniaturization and suppression of soaring costs, the flat circuit body can be reliably connected to both the positive electrode and the negative electrode, and the potential difference between the positive electrode and the negative electrode of each battery can be ensured. Can be measured.

According to the third aspect of the present invention, the positive electrode and the negative electrode project in the same direction from the battery body. The flat circuit body is stacked on one end surface of the battery body. Therefore, the flat circuit body is attached to the battery assembly without bending the conductor layer. Therefore, in addition to miniaturization and suppression of cost increase, disconnection of the conductor layer of the flat circuit body can be reliably prevented, and the potential difference between the positive electrode and the negative electrode of each battery can be reliably measured.

According to the fourth aspect of the present invention, the positive electrode connecting portion is provided at one edge of the flat circuit body and is provided corresponding to all the positive electrodes overlapping the one edge. . The negative electrode connecting portion is provided on the other edge portion of the flat circuit body and is provided corresponding to all the negative electrodes overlapping with the other edge portion. Therefore, the potential difference between the positive electrode and the negative electrode of each battery is measured by measuring the potential difference between the positive electrode connecting portion and the negative electrode connecting portion that face each other along a direction intersecting with one direction in which the batteries are arranged. You can measure reliably. Therefore, in addition to miniaturization and suppression of cost increase, the potential difference between the positive electrode and the negative electrode of each battery can be reliably measured.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a power supply device according to an embodiment of the present invention.

FIG. 2 is a plan view showing a main part of an FPC of the power supply device shown in FIG.

FIG. 3 is a cross-sectional view of a mounting location of an FPC, electrodes, and a bus bar of the power supply device shown in FIG.

FIG. 4 is an exploded perspective view of a conventional power supply device.

[Explanation of symbols]

1 power supply 2 Battery assembly 3 Measuring unit (measuring means) 4 batteries 4a One battery 4b other batteries 5 Battery body 6 Positive electrode (positive electrode) 7 Negative electrode (negative electrode) 8 one end face 10 FPC (flat circuit body) 14 Conductor layer 15 First insulating layer 16 Second insulating layer 17a One edge 17b The other edge 18 Positive connection 19 Negative electrode connection 22 Bus bar (connection member) H one direction

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Sakai Yagi             206-1 Nunobikihara, Haibara-cho, Haibara-gun, Shizuoka Prefecture Yazaki             Parts Co., Ltd. F term (reference) 5H022 AA01 AA04 CC02 CC21 KK04                 5H030 AA06 AS08 FF43 FF44                 5H040 AA01 AS07 AT01 AY06 DD05                       DD08

Claims (4)

[Claims]
1. A battery assembly comprising a plurality of batteries each having a positive electrode at one end and a negative electrode at the other end; and a positive electrode and a negative electrode of each battery constituting the battery assembly. In a power supply device including a measuring unit for measuring a potential difference, the measuring unit includes a conductor layer, a first insulating layer laminated on one surface of the conductor layer, and the other surface of the conductor layer. A flat circuit body having a laminated second insulating layer is provided, and the flat circuit body has a positive electrode connecting portion connecting the conductor layer and the positive electrode, the conductor layer and the negative electrode. A power supply device, comprising: a negative electrode connecting portion connected to an electrode.
2. The positive electrode connecting portion and the negative electrode connecting portion,
The power supply device according to claim 1, wherein both surfaces of the conductor layer are exposed.
3. The batteries each include a rectangular battery body, wherein the positive electrode and the negative electrode are parallel to each other and project from one end surface of the battery body in the same direction, and the flat electrode is flat. 3. The circuit body is stacked on the one end face, the positive electrode connecting portion is attached to the positive electrode, and the negative electrode connecting portion is attached to the negative electrode. Power supply.
4. The batteries are arranged along one direction, and a positive electrode of one battery is located at one end of the one direction and a negative electrode of another battery is located at the other end of the one direction. Except that the positive electrode and the negative electrode adjacent to each other are connected by a connecting member, the batteries are connected in series, and the positive electrode connecting portion is one edge portion of the flat circuit body. Is provided corresponding to each of all the positive electrodes arranged along the one direction and overlapping the one edge portion, and the negative electrode connecting portion is provided at the other edge portion of the flat circuit body. 4. The negative electrode, which is arranged along one direction and overlaps with the other edge, is provided in correspondence with each of the negative electrodes. 4. Power supply.
JP2001232006A 2001-07-31 2001-07-31 Power supply Active JP4001730B2 (en)

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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
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Publication Number Publication Date
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JP4001730B2 JP4001730B2 (en) 2007-10-31

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JP2010056035A (en) * 2008-08-29 2010-03-11 Sanyo Electric Co Ltd Battery system
JP2010080135A (en) * 2008-09-24 2010-04-08 Sanyo Electric Co Ltd Battery system
JP2010114025A (en) * 2008-11-10 2010-05-20 Denso Corp High voltage detection module device of battery pack
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