JP2000223098A - Power supply - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To efficiently assemble and mass-produce holder cases and end plates at low cost. Makes maintenance simple and easy and repairs efficiently. Recycle effectively with less time to dispose. A power supply device is connected to a holder case (2) for holding a plurality of power supply modules (1) in parallel, and connected to electrode terminals (5) of the power supply module (1) stored in the holder case (2) to connect adjacent power supply modules (1). A plurality of busbars 4 and an end plate 3 which is an insulating material holding the plurality of busbars 4 in place. Further, the power supply device has a bus bar fitting recess 18 for fitting the bus bar 4 in the end plate 3 and holding the bus bar 4 in a fixed position, and a stopper for preventing the bus bar 4 from coming out of the opening of the bus bar fitting recess 18. Claws 19 are provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply for a large current mainly used for a power supply of a motor for driving a vehicle such as a hybrid vehicle or an electric vehicle.

[0002]

2. Description of the Related Art A large-current power supply device used as a power supply for driving a motor for driving a vehicle drives a large number of batteries in series to increase the output voltage. This is to increase the output of the drive motor. An extremely large current flows in a power supply device used for this type of application. For example, in a hybrid vehicle or the like, when starting or accelerating, the vehicle is accelerated by the output of the battery, so that an extremely large current flows. In a power supply device used for a large current, it is important to reduce the electric resistance of a portion where a battery is connected. This is because the electric resistance of the connecting portion reduces the output power of the battery and wastes the power of the battery.

[0003] In order to reduce the resistance of the connecting portion, a power supply device used for this kind of application is connected to an electrode terminal of a battery.
Busbars made of thick metal plates are connected with set screws. The power supply device in which the bus bar is connected to the electrode terminal with the set screw can reduce the electric resistance of the connection portion, and is convenient for battery replacement. A power supply device that connects a large number of batteries cannot necessarily have the same life for all batteries.
In this type of power supply device, when some of the batteries are deteriorated, the overall performance is significantly reduced. Therefore, a structure in which a deteriorated battery can be replaced is extremely convenient for this type of power supply device.

A large number of batteries are connected in series with a bus bar,
It is important for the power supply device that increases the output voltage to insulate the bus bar. For example, in a power supply device using a nickel-hydrogen battery as a battery, the output voltage of one battery is 1.
Although the voltage is as low as 2V, if 200 of them are connected in series, the output voltage becomes as high as 240V. At such a high voltage, if the connected busbar is exposed, the operator may accidentally touch the high voltage, or when the busbar is screwed and connected, the adjacent busbar may touch and short-circuit. Or danger.

In order to solve such a problem, as shown in FIG. 1, a power supply device has been developed in which an end plate made of a plastic material is fixed between a bus bar and a battery. The end plate 3 in this figure is provided with an opening window 20 into which an electrode terminal of a battery is fitted. Open window 2
Screw the bus bar 4 to the electrode terminal that fits into
Adjacent batteries are connected. The end plate 3 having this structure has a drawback that the assembling is troublesome and the workability is deteriorated. This is because the bus bar 4 and the end plate 3 are separately fixed in place and assembled.

This disadvantage can be prevented by a structure in which a bus bar made of a metal plate is insert-molded and embedded in a plastic end plate, as described in JP-A-10-270006.

[0007]

Since the end plate of this structure has a bus bar inserted therein, the bus bar and the end plate can be fixed together and can be assembled efficiently. However, the power supply device of this structure requires extremely high precision in the manufacture of the holder case for holding a large number of batteries in a fixed position and the end plate in which the bus bar is inserted, and the maintenance becomes extremely difficult. There are drawbacks.

[0008] High precision is required for the holder case and the end plate because, when the relative position between the bus bar inserted in the end plate and the battery held in the holder case shifts, the bus bar is stopped at the battery electrode. This is because an excessive force acts on the battery in a state where the battery is connected with the screw. It is important that batteries used for this type of application be connected so that no excessive force acts on the batteries. This is because an excessive force acting on the battery causes the performance of the battery to deteriorate. In particular, a power supply device used for this kind of application receives vibration when the automobile runs, and if the vibration is applied in a state where an excessive force is applied, the battery has a bad influence.

Further, if the position of the bus bar is displaced, the set screw cannot be easily screwed into the bus bar, so that the connection of the bus bar is troublesome and the assembling work becomes difficult. This is because the through hole of the bus bar does not match the screw hole provided in the electrode of the battery, and the set screw cannot be easily inserted into the through hole of the bus bar and cannot be guided to the screw hole. Forcibly inserting the setscrew will apply excessive force to the battery.

Further, the end plate having the bus bar inserted therein cannot be replaced with a corroded bus bar or the like, and cannot be repaired in a state where various parts inserted into the end plate are exposed to the outside. There is also a disadvantage that it cannot be maintained well. In the power supply device having this structure, for example, when a part inserted into the end plate fails, the entire end plate needs to be replaced, and the repair cost becomes extremely high. Also, since the inserted parts cannot be exposed to the outside,
It is difficult to inspect whether a part inside the end plate has failed, and it is also difficult to find a failed part. Furthermore,
When the power supply device is discarded, the bus bar and the end plate cannot be separated and dismantled. Therefore, in recycling parts, it is difficult to separate metal and plastic, and it is difficult to efficiently and effectively reuse the metal and plastic.

The present invention has been developed to solve such disadvantages of the conventional power supply device. An important object of the present invention is that, in addition to being able to assemble efficiently, the holder case and the end plate can be mass-produced at low cost.
It is still another object of the present invention to provide a power supply device that can be easily and easily maintained and repaired efficiently, and that can be effectively recycled with less trouble of disposal.

[0012]

According to the power supply device of the present invention, a holder case 2 for holding a plurality of power supply modules 1 in parallel and an electrode terminal 5 of the power supply module 1 housed in the holder case 2 are connected. A plurality of bus bars 4 connecting adjacent power supply modules 1 and an end plate 3 which is an insulating material holding the plurality of bus bars 4 at fixed positions. Further, the power supply device has a bus bar fitting recess 18 for fitting the bus bar 4 in the end plate 3 and holding the bus bar 4 in a fixed position.
A stopper claw 19 for preventing the bus bar 4 from coming out is provided in the opening 8.

According to a second aspect of the present invention, there is provided the power supply unit, wherein the end plates are connected to each other in a stacked state.
A and a cover 3B. The main body 3A is arranged on the side facing the power supply module 1, and the cover 3B is arranged and laminated on the back of the main body 3A. Further, the main body 3A is
On the back surface, a bus bar fitting recess 18 for holding the bus bar 4 in a fixed position is provided.

In the power supply unit according to a third aspect of the present invention, bus bar fitting recesses 18 for holding the plurality of bus bars 4 at fixed positions are provided in the main body 3A of the end plate 3 in the vertical and horizontal directions. The end plates 3 having this structure can be the same structure provided on both sides of the holder case 2.

In the power supply unit according to a fourth aspect of the present invention, the main body 3A of the end plate 3 is provided with a lead wire groove 21 for holding the lead wire 9. End plate 3 of this structure
The cover 3B can be connected to the main body 3A by holding the lead wire 9 at a fixed position of the main body 3A. The cover 3B can be easily connected to the main body 3A with the lead wire 9 kept out of the way.

The power supply according to claim 5 of the present invention further comprises:
Since the stopper claw 22 for preventing the lead wire 9 from coming out is provided in the opening of the lead wire groove 21, the lead wire 9 can be efficiently set in the main body 3A. In particular, a plurality of lead wires 9 can be efficiently set on the main body 3A.

According to a sixth aspect of the present invention, there is provided a power supply device comprising:
A and the cover 3B are connected by any one of a fitting structure, spot welding, local bonding, and screwing. The main body 3A and the cover 3B connected by the fitting structure can be easily attached and detached, which is extremely convenient for maintenance. In the structure using spot welding or bonding, the cover portion can be separated from the main body portion by removing the locally welded or bonded portion. Further, the screwed cover can be separated from the main body by removing the set screw.

According to a seventh aspect of the present invention, there is provided a power supply unit comprising:
A peripheral wall 28 is integrally formed along the periphery of A.
The outer shape of the cover portion 3B is substantially equal to the shape of the inside of the peripheral wall 28. The end plate 3 has a cover 3B fitted inside the peripheral wall 28 of the main body 3A to connect the cover 3B to a fixed position of the main body 3A.

The power supply device according to claim 8 of the present invention is located at both end portions of the bus bar fitting concave portion 18 of the end plate 3 and connects the both end portions of the bus bar 4 to the electrode terminals 5 of the power supply module 1. Is provided. Further, a stopper claw 19 is provided between these opening windows 20.

According to a ninth aspect of the present invention, the power supply module 1 held by the holder case 2 includes a plurality of rechargeable batteries 6 connected linearly.

[0021]

Embodiments of the present invention will be described below with reference to the drawings. However, the embodiments described below exemplify a power supply device for embodying the technical idea of the present invention, and the present invention does not specify the power supply device as follows.

Further, in this specification, in order to make it easy to understand the claims, the numbers corresponding to the members shown in the embodiments will be referred to as “claims” and “ In the column of “means”.
However, the members described in the claims are not limited to the members of the embodiments.

As shown in FIG. 2, the power supply device includes a holder case 2 for holding a plurality of power supply modules 1 in parallel,
A bus bar 4 positioned at an end of the holder case 2 and fixed by screwing to an electrode terminal 5 provided at an end of the power supply module 1 housed in the holder case 2; And an end plate 3 fixed to an end of the holder case 2.

The power supply module 1 is formed by connecting a plurality of secondary batteries or supercapacitors having a large capacitance in a straight line. Are connected in series. A power supply module using supercapacitors connects a plurality of supercapacitors in parallel. However, the power supply module can be composed of one secondary battery or a super capacitor. In the power supply module 1 shown in FIG. 2, a cylindrical secondary battery 6 is linearly connected by a dish-shaped connector 7. An electrode terminal 5 composed of a positive terminal and a negative terminal is connected to both ends of the power supply module 1.

FIG. 3 shows a circuit diagram of the power supply device shown in FIG. The power supply device shown in this figure incorporates 8 × 2 rows of power supply modules 1, and each power supply module 1 is connected in series. Bus bar 4 for connecting each power supply module 1
Is connected to a lead wire 9 for detecting the voltage of the power supply module 1 via a fuse 8.

FIGS. 4 and 5 show a structure in which the dish-shaped connecting member 7 connects the batteries 6 linearly. In the power supply module 1 having this structure, the disk portion 7A of the dish-like connection body 7 is connected to the positive electrode of the cylindrical battery 6 by welding. The disk portion 7A of the dish-shaped connection body 7 is provided with a projection 7a to be welded to the positive electrode of the cylindrical battery 6. When the projection 7a of the dish-like connector 7 is welded to the positive electrode, the projection 7a
Is pressed against the upper surface of the electrode. In order to prevent a short circuit between the dish-shaped connector 7 and the cylindrical battery 6, an insulator 10 is sandwiched between the dish-shaped connector 7 and the cylindrical battery 6 in a ring shape.

Further, the dish-shaped connecting member 7 is provided with a flange portion 7B.
And the flange portion 7B is welded to the outer can 6A which is the negative electrode of the cylindrical battery 6. The projection 7a provided on the inner surface of the flange portion 7B is also welded to the outer can 6A, similarly to the disk portion 7A. At this time, the welding electrode rod is pressed against the flange portion 7B outside the projection 7a.

The batteries 6 connected in series include a dish-shaped connecting body 7.
6, the facing surfaces of the U-curved lead plates 11 can be welded to each other and connected as shown in the cross-sectional view of FIG. In the power supply module 1 in this figure, a large current is pulsed in the direction in which the battery 6 is discharged, and the opposite surface of the U-shaped lead plate 11 is welded. The lead plate 11 can be welded, for example, by applying a large current pulse that passes a current of 1 KA for about 15 milliseconds.

Further, as shown in the sectional view of FIG. 7, the battery 6 has a large current pulse in the direction of discharging the battery 6 with the metal plate 12 sandwiched between the + and-electrodes of the battery 6. After the treatment, the metal plate 12 can be welded to the electrode of the battery 6.

Further, as shown in FIG. 8, the positive and negative electrodes of the battery 6 can be directly welded without sandwiching a metal plate between the batteries 6. In this battery 6, a conical projection is provided on the upper surface of a sealing plate serving as a positive electrode terminal, and this projection is welded to a negative electrode terminal of an adjacent battery 6 by applying a large current pulse.

As shown in FIGS. 6 to 8, the + and-electrodes of the battery 6 are directly connected by welding without using the dish-shaped connecting member 7, or the + and-electrodes are connected to both sides of the metal plate. The power supply module 1, which is directly welded to the power supply module, can extremely reduce the electric resistance between the batteries. Another feature is that the connection strength of the battery 6 can be increased.

Power supply modules 1 connected in series to each other
As shown in FIGS. 9 and 10, the positive terminal of the battery 6 is connected to the positive terminal 5A, and the negative terminal of the battery 6 is connected to the negative terminal 5B. The central convex portion of the positive terminal 5A and the negative terminal 5B are shown in FIG.
As shown in FIG. 1 and the perspective view of FIG. The reason why the central convex portion of the positive electrode terminal 5A and the negative electrode terminal 5B are formed into a quadrangular prism shape is that the opening window 2 provided in the end plate 3 is provided.
This is for positioning and connecting the plurality of power supply modules 1 by fitting them into the power supply modules 1. The electrode terminals 5, which are the positive electrode terminal 5 </ b> A and the negative electrode terminal 5 </ b> B, are provided around the female screw holes 5 a connecting the bus bars 4.

The secondary battery 6 of the power supply module 1 is a nickel-metal hydride battery. However, as the secondary battery 6 of the power supply module 1, a nickel-cadmium battery, a lithium ion secondary battery, or the like can be used.

The power supply module 1 is, as shown in FIG.
A temperature sensor 13 is fixed to the surface of each battery 6. The temperature sensor 13 is an element that can detect a battery temperature.
Preferably, PTC is used for the temperature sensor 13 so that the electric resistance changes with the battery temperature. The temperature sensor 13 fixed to the surface of each battery 6 includes a sensor lead 1
The power supply module 1 is connected to the power supply module 1 in a straight line, and is fixed to the surface of the power supply module 1 by extending in the vertical direction. The temperature sensor 13 and the sensor lead 14 are fixed to the surface of the battery 6 with a heat-shrinkable tube or the like covering the surface.

As shown in an exploded perspective view of FIG. 13, the holder case 2 includes upper and lower lid cases 2A and an intermediate case 2B disposed between the upper and lower lid cases 2A. The lid case 2A and the intermediate case 2B are entirely formed of plastic. The cover rib 2A and the intermediate case 2B are integrally formed with a holder rib 15 in order to hold the power supply module 1 in a fixed position. Lid case 2A shown in the figure
The intermediate case 2B has a plurality of rows of holder ribs 15 provided in parallel at both ends and in the middle. Holder rib 15
It is provided on the inner surface of the lid case 2A and on both surfaces of the intermediate case 2B. The holder rib 15 is a cylindrical power supply module 1.
Is provided in a semicircular holding concave portion 15A which is curved along the outer shape of the power supply module 1 in order to hold the power supply module 1 in a fixed position. The cylindrical power supply module 1 is fitted in the holding recess 15A and held in a fixed position in a sandwiched state.

The holder rib 15 is connected to a rubber-like elastic cushioning packing 16 along the holding recess 15A to improve the shock resistance of the battery 6. Holder case 2 in FIG.
Connect buffer cushions 16 to two rows of holder ribs 15. As shown in FIG. 14, the cushioning packing 16
It is formed in a shape along the holder rib 15. The buffer packing 16 shown in FIG. 13 is the same as the buffer packing 1 shown in FIG.
6 shows a state where the concave portions 6 are connected to face each other. The buffer packing 16 holds the power supply module 1 with the power supply module 1 interposed between the concave portions facing each other, in a state of being in close contact with the power supply module 1. The holder case 2 in which the buffer gasket 16 is connected to the holder rib 15 allows the buffer gasket 16 to absorb the vibration, thereby preventing the battery 6 from being vibrated.

The holder rib 15 has a guide groove 17 for guiding the temperature sensor 13 and the sensor lead 14 projecting from the surface of the power supply module 1 in a convex shape at the bottom of the holding recess 15A. The temperature sensor 13 and the sensor lead 14 are inserted into the holding recess 15A, and the holder rib 15 holds the power supply module 1 between the holding recess 15A and holds the power supply module 1 in a fixed position.

The holder case 2 having the above structure is assembled in the following state to hold the power supply module 1 in parallel. The lower lid case 2A is placed horizontally, and the power supply modules 1 are put in the holding recesses 15A of the holder ribs 15 and are arranged in parallel. In the illustrated lid case 2A, 8
The power supply modules 1 are arranged in a row. Power supply module 1
The two end faces are arranged on the holder rib 15 so as to be flush with each other. At this time, the temperature sensor 13 and the sensor lead 14 projecting from the surface of the power supply module 1 are guided to the guide groove 17 of the holder rib 15. The intermediate case 2B is placed on the lower lid case 2A. The intermediate case 2B has a holder rib 15 projecting from the lower surface.
The power supply module 1 is put in the holding recess 15A, and the power supply module 1 is stacked at a predetermined position. The power supply modules 1 are put in the holding recesses 15A of the holder ribs 15 projecting from the upper surface of the intermediate case 2B and are arranged in parallel. Also at this time, the power supply modules 1 are arranged such that both ends of the power supply module 1 are on the same plane. The upper lid case 2A is placed on the power supply module 1, and the lid case 2A is stacked at a fixed position. In this state,
Holder rib 15 protruding from the lower surface of lid case 2A
The power supply module 1 is guided to the holding recess 15A. The upper and lower lid cases 2A are connected by connecting screws (not shown), and the upper and lower lid cases 2A and the intermediate case 2B are connected and fixed. The connecting screw penetrates the upper and lower lid cases 2A and the intermediate case 2B to connect them. The connection screws connect the four corners of the upper and lower lid cases 2A and the middle thereof.

In the above state, the power supply module 1
End plate 3 in holder case 2
Is fixed. End plate 3 is holder case 2
Bus bar 4 for connecting the power supply modules 1 in series. As shown in the exploded perspective views of FIGS. 15 and 16, the end plate 3 that holds the bus bar 4 in a fixed position includes a main body 3A and a cover 3B that are connected to each other in a stacked state. The main body 3A and the cover 3B are manufactured separately and integrally formed of plastic. The main body 3A is provided on the side facing the power supply module 1, and the cover 3B is provided on the back surface of the main body 3A.

The main body 3A has a bus bar 4 on the back side for connecting the power supply modules 1 in series. The bus bar 4 provided here is sandwiched between the main body 3A and the cover 3B, and is held at a fixed position on the end plate 3.

The main body 3A shown in the figure has a busbar fitting recess 18 formed on the back surface for holding the busbar 4 in a fixed position. The busbar fitting concave portion 18 is substantially equal to the outer shape of the rectangular busbar 4 and, more precisely, is a slightly larger rectangle so that the busbar 4 as a metal plate can be fitted in a fixed position. The main body 3A shown in the perspective views of FIGS. 15 and 16 and FIG. 17 has the busbar fitting recess 18 extending in the lateral direction. In the present specification, the vertical and horizontal directions of the bus bar 4 are defined as the longitudinal direction of the bus bar 4, and the direction orthogonal to this direction is defined as the vertical direction. Main unit 3A shown in FIG.
The busbar fitting recess 18 is provided extending in the vertical direction. Further, the main body 3A shown in FIG. 19 is provided with busbar fitting recesses 18 in the vertical and horizontal directions. Busbar fitting recess 18
The bus bar 4 is fitted here, and the power supply modules 1 are connected in series by the bus bar 4.

In the opening of the busbar fitting recess 18, FIG.
As shown in FIG. 0, a stopper claw 19 for preventing the bus bar 4 from coming out is provided integrally with the plastic main body 3A. As shown in the enlarged view of FIG. 21 and the cross-sectional view of FIG. 22, the stopper claw 19 is provided so as to protrude inward from the opening of the busbar fitting recess 18. The stopper claw 19 shown in the figure is a bus bar fitting recess 18 which is open in a rectangular shape.
The opening is provided substantially at the center of the long side so as to face inward so as to protrude inward. Opening windows 20 are provided at both ends of the busbar fitting recess 18 for connecting both ends of the busbar 4 inserted therein to the electrode terminals 5 of the power supply module 1. The bus bar fitting concave portion 18 shown in the figure has a stopper claw 19 provided between the opening windows 20 provided at both ends.

The stopper claw 19 is provided with the bus bar fitting recess 18.
Can be provided at the portions of the opening windows 20 provided at both ends. The main body 3A of this structure has a feature that the stopper claw 19 can be formed by a mold having a simple structure. It is shown in FIG.
As shown in the cross-sectional view of FIG. 5, a mold 35 for forming an opening window 20 opening at both ends of the busbar fitting concave portion 18 is used.
This is because the protruding inner surface of the stopper claw 19 protruding inward can be formed. As shown in FIG.
The mold 35 for molding the inner surface of the protrusion 9 can be moved in the direction indicated by the arrow A to release the molded main body 3A from the mold 35.

If the height of the stopper nail 19 protruding into the opening window 20 is increased, the bus bar 4 can be securely held in the bus bar fitting recess 18, but it is difficult to insert the bus bar 4 into the bus bar fitting recess 18. Become. Conversely, when the stopper claws 19 are lowered, the bus bar 4 can be easily inserted into the bus bar fitting recess 18, but the bus bar 4 can easily come out of the bus bar fitting recess 18. The protrusion amount of the stopper claw 19 is
The bus bar 4 is designed so that it can be smoothly inserted into the bus bar fitting recess 18 and that the bus bar 4 inserted into the bus bar fitting recess 18 can be effectively prevented from coming out.

In the end plate 3 having this structure, as shown by the arrow in FIG.
And hold it in place. When the bus bar 4 is inserted into the bus bar fitting recess 18, the stopper claws 19 are slightly elastically deformed to allow the bus bar 4 to pass. The bus bar 4 fitted in the bus bar fitting recess 18 is, for example, an opening window 20.
Even if the main body 3A is turned upside down, the busbar does not come out from the recess 18. When the bus bar 4 is forcibly taken out from the bus bar fitting recess 18, the stopper claw 19 is slightly elastically deformed and passes through the bus bar 4.

The holder case 2 shown in FIG. 2 has two upper and lower stages, and accommodates eight rows of power supply modules 1 in each stage. The power supply module 1 has one end connected in series with a bus bar 4 built in one end plate 3 in a horizontal direction, and a bus bar 4 built in a vertical direction in the other end plate 3.
And all the power supply modules 1 are connected in series as shown in the schematic diagram of FIG. Therefore, the end plate 3 fixed to one end of the holder case 2 incorporates the bus bar 4 in the lateral direction as shown in FIGS. 15, 16 and 17, and the other end of the holder case 2 As shown in FIG. 18, the end plate 3 fixed to the portion has a bus bar 4 built therein in the vertical direction. FIG.
As shown in the figure, the main body 3A having the busbar fitting recesses 18 in the vertical and horizontal directions can be fixed to both ends of the holder case 2.

The main body 3A has opening windows 20 at both ends of the bus bar fitting recess 18 for connecting the bus bar 4 to the electrode terminals 5 of the power supply module 1. The opening window 20 is opened so that the electrode terminal 5 fixed to the electrode of the battery 6 can be fitted without rotating. The power supply module 1 shown in the figure has square electrode terminals 5 fixed to both ends. In order to fit the electrode terminal 5, the opening window 20 is substantially equal to the outer shape of the electrode terminal 5, and more precisely, has an inner shape slightly larger than the electrode terminal 5. Main body 3A of this structure
Inserts the electrode terminal 5 of the power supply module 1 into the opening window 20 and holds the power supply module 1 so as not to rotate.
The bus bar 4 can be connected.

Further, the main body 3A shown in the figure is provided with a lead wire groove 21 for holding the lead wire in a fixed position. The lead wire groove 21 is provided in parallel with the bus bar fitting recess 18. A stopper claw 22 for preventing the lead wire from coming out is also provided in the opening of the lead wire groove 21. Stopper claw 22
Is disposed at a position facing the opening of the lead wire groove 21. The distance between the opposing stopper claws 22 is substantially equal to the thickness of the lead wire. The stopper claw 22 makes it easy to insert a lead wire into the lead wire groove 21 and makes it difficult for the lead wire to come out of the lead wire groove 21.

The lead wire is connected to the bus bar 4 via a fuse 8 for detecting the voltage of each power supply module 1. The main body 3A has a fuse recess 23 for disposing the fuse 8 at a fixed position. The fuse recess 23 is provided in connection with the lead wire groove 21. In the wall between the fuse recess 23 and the busbar fitting recess 18, there is provided a cutout 24 for disposing a lead plate for connecting the fuse 8 to the busbar 4.

Further, the main body 3A shown in FIGS.
Has a connecting plate fitting recess 26 for holding the sensor connecting plate 25 in a fixed position on the back surface. The connecting plate fitting recess 26 is
The busbar fitting recess 1 is adjacent to the busbar fitting recess 18.
8 and is provided in parallel with the busbar fitting concave portion 18. The main body 3A shown in FIGS. 20 to 22 is integrally formed with a stopper claw 36 for preventing the sensor connecting plate 25 from coming out in the opening of the connecting plate fitting concave portion 26, similarly to the bus bar fitting concave portion 18. It is provided.

The sensor connecting plate 25 fitted in the connecting plate fitting concave portion 26 connects the temperature sensors 13 fixed to the power supply module 1 in series. The power supply module 1 is shown in FIG.
As shown in FIG. 7, the sensor lead 14 is protruded adjacent to the electrode terminal 5. The sensor leads 14 are connected to the sensor connection plate 25, and all the temperature sensors 13
Are connected in series.

The sensor lead 14 is connected to the sensor connecting plate 25
The main body 3A is connected to the sensor lead 14
Through the connection hole 27 that allows the passage of the air. The connection hole 27 is opened to the outside of the connection plate fitting recess 26 adjacent to the end of the connection plate fitting recess 26. The sensor lead 14 protruding from the power supply module 1 is
, And is connected to the sensor connection plate 25 to connect all the temperature sensors 13 in series. The temperature sensors 13 connected in series with each other output a detection signal to the outside via a lead wire. When one of the temperature sensors 13 detects that the battery temperature has become abnormally high, the signal from the temperature sensor 13 is processed by an externally connected protection circuit or the like, and the charge / discharge current of the battery 6, for example, is measured. Or the current is cut off to protect the battery 6.

In order to hold the cover 3B at a fixed position, the main body 3A is provided with a peripheral wall 28 integrally formed along the periphery so as to protrude from the rear surface. Main body 3A with peripheral wall 28
Can be laminated and fixed so that the cover portion 3B is not displaced accurately. Further, the cover 3 is provided inside the peripheral wall 28.
Both B and the waterproof cover 29 can be stacked and connected and fixed in place. A waterproof cover 29 is provided inside the peripheral wall 28.
Has a feature that the outer periphery of the waterproof cover 29 and the inner surface of the peripheral wall 28 are made waterproof, and the end plate 3 can be reliably made waterproof.

The cover portion 3B is laminated and fixed on the back surface of the main body portion 3A, and closes the opening of the bus bar fitting concave portion 18, the connecting plate fitting concave portion 26, and the lead wire groove 21. In this state, the main body 3A and the cover 3B are held at fixed positions with the bus bar 4, the sensor connecting plate 25, and the lead wire held therebetween. In a state where the cover 3B is connected and fixed to the main body 3A, the bus bar 4, the sensor connecting plate 25, and the lead wires are set at fixed positions and do not go outside. The outer shape of the cover 3B is substantially equal to the inner shape of the peripheral wall 28 provided on the main body 3A. The cover part 3
This is for laminating B at a fixed position of the main body 3A.

The cover 3B shown in FIGS. 15 and 16 has the opening window 2 at the same position as the opening window 20 provided in the main body 3A.
0 is open. This end plate 3 is
An opening window 20 is opened at a position where both A and the cover 3B face each other, so that the bus bar 4 incorporated in the end plate 3 can be connected to the electrode terminal 5 of the power supply module 1 with a set screw 30.

Further, the cover portion 3B is provided with a cutout portion 31 for connecting the sensor lead 14 of the power supply module 1 to the sensor connection plate 25 on the outer periphery. Notch 31
Is disposed outside the opening window 20. The cover 3 </ b> B is formed by integrally forming a ridge along the outer periphery and the periphery of the opening window 20. The ridge not only reinforces the cover 3B, but also extends from the opening window 20 and the notch 31 to the end plate 3B.
It effectively prevents water from entering the interior of the device.

The cover 3B shown in FIGS. 15 and 16 has lead-out openings 32 at both ends for leading the lead wires to the outside from the end plate 3. The lead wire set in the lead wire groove 21 is drawn out from the drawing opening 32 to the outside.

The cover 3B is provided with a stopper projection 33 integrally formed on the outer peripheral surface so that the cover 3B can be fitted and connected to the peripheral wall 28 of the main body 3A. The cover portion 3B shown in the figure is formed so that a plurality of stopper projections 33 protrude from each side of the cover portion 3B having a square overall shape. The stopper concave portion 34 for guiding the stopper convex portion 33 is provided on the inner surface of the peripheral wall 28 of the main body 3A. The stopper recess 34 may be a through hole provided in the peripheral wall 28 as shown in FIG. Cover part 3
26B, as shown in FIG. 26, the stopper protrusion 33 is guided to the stopper recess 34, and is connected to a fixed position of the main body 3A and fixed. The end plate 3 shown in FIG.
B is provided with a stopper convex portion 33 and a main body portion 3A is provided with a stopper concave portion 34.
A stopper may be provided on the main body to connect the cover to a fixed position of the main body. Alternatively, a stopper projection may be provided only on the inner surface of the peripheral wall of the main body, and the cover may be pushed inward of the stopper projection to connect the cover to the main body.

In the above fitting structure, the end plate 3 connecting the cover 3B and the main body 3A is connected to the cover 3
There is a feature that B can be easily and easily detached and connected to the main body 3A and quickly. However, the cover may be connected to the main body by a structure such as spot welding, local bonding, or screwing.

The waterproof cover 29 laminated on the back surface of the cover 3B is a plastic plate, and its outer shape is defined by the body 3A.
Are formed substantially equal to the inner shape of the peripheral wall 28, and a lead wire cutout 29A and a power cord outlet hole 29B are opened.

The end plate 3 having the above-described structure includes the bus bar 4, the sensor connecting plate 25, and the fuse 8 in the main body 3A.
Is disposed at the determined position, and the cover 3B is fixed to the rear surface. In this state, the end plate 3 is fixed to the holder case 2 holding the power supply module 1 in a fixed position, and as shown in the sectional view of FIG. The bus bar 4 of the end plate 3 is connected to the electrode terminal 5 of the power module 1. With the end plate 3 connected to the holder case 2,
The bus bar 4 can be easily and efficiently connected to the electrode terminal 5.
However, the end plate 3 can be fixed by connecting the bus bar 4 to the electrode terminal 5 of the power supply module 1 and then to the holder case 2.

The end plate 3 having the above structure connects the main body 3A and the cover 3B, and the bus bar 4
Hold. However, in the power supply device of the present invention, the end plate does not necessarily need to be formed of the main body and the cover. For example, although not shown, the end plate may be configured only with the main body without the cover. The end plate having this structure has a feature that the structure can be simplified and manufactured at lower cost. The end plate of the main body only has the busbar and sensor connection plate exposed to the outside, but fix the plastic waterproof cover on the back of the main body,
The exposed portion can be covered in an insulating state.

[0063]

The power supply device according to the present invention has a feature that, in addition to being able to be efficiently assembled, a holder case and an end plate can be mass-produced inexpensively. That is, the power supply device of the present invention is provided with a bus bar fitting recess for fitting the bus bar into the end plate and holding the bus bar at a fixed position, and a stopper claw for preventing the bus bar from coming out at the opening of the bus bar fitting recess. This is because it is provided. The end plate having this structure can prevent the bus bar from coming out of the bus bar fitting recess by fitting the bus bar into the bus bar fitting recess. For this reason, a plurality of busbars can be mounted at fixed positions on the end plate, and each busbar can be efficiently connected to the electrode terminal of the battery.

Further, the power supply device of the present invention has a feature that maintenance can be simplified and easily performed and the repair can be performed efficiently. That is, the power supply device of the present invention does not fix the bus bar connecting the plurality of power supply modules to the end plate with a structure such as an insert, but inserts the bus bar into the bus bar fitting concave portion provided in the main body portion and uses the stopper claw. This is because it is held in a fixed position so as not to come out. That is, since the main body and the bus bar are separate parts and the bus bar is held at a fixed position of the main body, each bus bar can be easily replaced independently without replacing the main body.

Further, the power supply device of the present invention has a feature that both the bus bar and the end plate can be effectively recycled and reused with less labor for disposal. This is because the bus bar can be separated from the main body, and the metal bus bar and the end plate can be easily separated.

[Brief description of the drawings]

FIG. 1 is a perspective view of an end plate of a conventional power supply device.

FIG. 2 is an exploded perspective view of the power supply device according to the embodiment of the present invention.

FIG. 3 is a circuit diagram of a power supply device according to an embodiment of the present invention.

FIG. 4 is a side view of a power supply module built in the power supply device shown in FIG. 2;

5 is an exploded cross-sectional view showing a connection structure of batteries of the power supply module shown in FIG.

FIG. 6 is a cross-sectional view showing another example of the battery connection structure of the power supply module.

FIG. 7 is a cross-sectional view showing another example of the battery connection structure of the power supply module.

FIG. 8 is a cross-sectional view showing another example of the battery connection structure of the power supply module.

9 is an exploded cross-sectional view showing a connection structure of a positive electrode terminal of the power supply module shown in FIG. 4;

FIG. 10 is an exploded cross-sectional view showing a connection structure of electrode terminals on the negative electrode side of the power supply module shown in FIG. 4;

FIG. 11 is an enlarged perspective view of a positive electrode terminal shown in FIG. 9;

12 is an enlarged perspective view of the negative electrode terminal shown in FIG.

13 is an exploded perspective view of a holder case of the power supply device shown in FIG.

14 is an enlarged perspective view of a cushioning packing connected to a holder rib of the holder case shown in FIG.

15 is an exploded perspective view of an end plate of the power supply device shown in FIG.

16 is an exploded perspective view showing a state where the end plate shown in FIG. 15 is assembled.

17 is a plan view of a main body of the end plate shown in FIG.

FIG. 18 is a plan view showing another example of the main body of the end plate.

FIG. 19 is a plan view showing another example of the main body of the end plate.

FIG. 20 is a plan view showing a state where a bus bar is mounted on a main body of the end plate.

FIG. 21 is an enlarged view of the main body shown in FIG. 20;

22 is a cross-sectional view of the main body shown in FIG. 21 taken along line AA.

FIG. 23 is a cross-sectional view showing a state where a main body according to another embodiment is molded with a mold.

24 is a sectional view showing a state where a bus bar is attached to the main body shown in FIG. 22;

FIG. 25 is a schematic perspective view showing a state in which a plurality of power supply modules are connected in series by a bus bar.

FIG. 26 is a cross-sectional view showing a connection structure between a bus bar of an end plate and a power supply module.

[Explanation of symbols]

1: Power supply module 2: Holder case 2A: Lid case
2B: Intermediate case 3: End plate 3A: Main body 3
B: Cover part 4: Bus bar 5: Electrode terminal 5A: Positive terminal 5
B: negative electrode terminal 5a: female screw hole 6: battery 6A: outer can 7: dish-shaped connection body 7A: disk part 7
B: Flange 7a ... Projection 8 ... Fuse 9 ... Lead wire 10 ... Insulator 11 ... Lead plate 12 ... Metal plate 13 ... Temperature sensor 14 ... Sensor lead 15 ... Holder rib 15A ... Holding recess 16 ... Buffer packing 17 ... Guide groove DESCRIPTION OF SYMBOLS 18 ... Busbar fitting recessed part 19 ... Stopper claw 20 ... Opening window 21 ... Lead wire groove 22 ... Stopper claw 23 ... Fuse recessed part 24 ... Notch 25 ... Sensor connection plate 26 ... Connection plate fitting recessed part 27 ... Connection hole 28 ... Peripheral wall 29 ... waterproof cover 29A ... drawer notch 2
9B: Take-out hole 30: Set screw 31: Notch portion 32: Pull-out opening 33: Stopper convex portion 34: Stopper concave portion 35: Mold 36: Stopper claw

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Ryoji Takasaki 2-5-5 Keihanhondori, Moriguchi-shi, Osaka F-term in Sanyo Electric Co., Ltd. 5H020 AA01 AS04 AS11 BB05 CC06 DD06 5H022 AA19 BB11 BB15 BB16 CC12 CC14 CC27 KK03

Claims (9)

[Claims] The power supply module is connected to an electrode terminal (5) of a power supply module (1) housed in the holder case (2) and a plurality of power supply modules (1). In a power supply device including a plurality of bus bars (4) connecting adjacent power supply modules (1) and an end plate (3) that is an insulating material holding the plurality of bus bars (4) in place, The end plate (3) has a bus bar fitting recess (18) for fitting and holding the bus bar (4) in place, and the bus bar (4) comes out of the opening of the bus bar fitting recess (18). A power supply device having a stopper claw (19) for preventing the power supply. 2. An end plate (3) comprising a main body (3A) and a cover (3B) connected to each other in a stacked state,
The main body (3A) is arranged on the side facing the power supply module (1), the cover (3B) is arranged and laminated on the back of the main body (3A), and the busbar is mounted on the back of the main body (3A). The power supply device according to claim 1, further comprising a bus bar fitting recess (18) for holding (4) in a fixed position. 3. A busbar fitting recess for holding a plurality of busbars (4) in place at a main body (3A) of an end plate (3).
3. The power supply device according to claim 2, wherein (18) is provided in a vertical direction and a horizontal direction. 4. The power supply device according to claim 2, wherein a lead wire groove (21) for holding a lead wire (9) is provided in the main body (3A) of the end plate (3). 5. A lead wire is provided in an opening of the lead wire groove (21).
The power supply device according to claim 4, further comprising a stopper claw (22) for preventing the (9) from coming out. 6. The power supply according to claim 2, wherein the main body (3A) and the cover (3B) are connected by any one of a fitting structure, spot welding, local bonding, and screwing. apparatus. 7. A peripheral wall (28) is integrally formed along a peripheral edge of the main body (3A), and an outer shape of the cover (3B) is formed by the peripheral wall (28).
It is formed almost equal to the inner shape, and the peripheral wall (2
7. The power supply device according to claim 6, wherein the cover (3B) is fitted inside the inside of (8), and the cover (3B) is connected to a fixed position of the main body (3A). 8. An opening for connecting both ends of the bus bar (4) to the electrode terminals (5) of the power supply module (1), wherein the end plates (3) are located at both ends of the bus bar fitting recess (18). Window (20)
The power supply device according to claim 1, further comprising a stopper claw (19) provided between the opening windows (20). 9. The power supply device according to claim 1, wherein the power supply module (1) held in the holder case (2) is formed by connecting a plurality of secondary batteries (6) in a straight line.