JPH11195442A - Power connecting device and power-supply device using power connecting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power connecting device that allows the battery replacement of an uninterruptive power supply to be carried out simply and securely within a short time. SOLUTION: This power-supply device is composed by placing a battery box 18 movably forward and backward in a battery storing part 16 of a case 15 having a power supply circuit storing part 17, mounting either one of a contact socket 32 of the battery box 18 side or a contact pin 31 of the case 15 side with a play and the other fixedly, and making the contact socket 32 and the contact pin 31 to come into contact with or separate from each other in response to the forward and backward movement of the battery box 18. In the case of replacing a battery 14, when the battery box 18 is taken out from the front of the case 15, the contact socket 32 is disconnected and separated electrically from the contact pin 31. In this condition, the old battery 14 is replaced with a new one. After the replacement, the battery box 18 is inserted into the case 15 again and the electrical connection is thereby secured as well.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power connection device and a power supply device using the power connection device.
More particularly, the present invention relates to an improvement in a battery box or a power connector and a case of an uninterruptible power supply for easily performing a backup battery replacement operation in a case of the uninterruptible power supply.

[0002]

2. Description of the Related Art As shown in FIG. 7, in recent various electronic devices in which a microcomputer 11, a display unit 12, and the like are mounted on a rack 10, an uninterruptible power supply 13 is used for a semiconductor memory such as a personal computer and a work station. It is widely used as a backup power supply for data protection. The uninterruptible power supply, as shown in FIG.
The case 15 including the bottom plate 27, the front plate 20, and the back plate 21 is partitioned by a middle partition plate 22 at a position substantially halfway, and a battery storage unit 16 and a power supply circuit storage unit 17 such as an inverter are provided. Inside, a plurality of batteries 14 such as lead seals connected in series are housed,
When the commercial power supply fails, 100 V AC is generated from the battery 14 by the power supply circuit housing 17 such as an inverter, and stable power is supplied to the load device to prevent data loss of the information processing device due to the power failure.

[0003] However, the backup battery 14 used in the uninterruptible power supply 13 has a life, and needs to be replaced approximately every three years in order to satisfy the function of the uninterruptible power supply 13. The number of uninterruptible power supply units 13 to be installed has increased with the increase in electronic devices to back up power,
The number of battery replacements is also increasing.

[0004]

As shown in FIG. 6, a battery 14 of a conventional uninterruptible power supply 13 is mounted in a battery box 18, covered with a battery cover 19,
It is housed in the battery housing part 16 of the uninterruptible power supply 13 from above, and is fixed at fixed edges 29, 28 and 26 with screws.

[0005] In the battery replacement work due to the life, first, the cover 23 of the uninterruptible power supply 13 is removed, and then the battery fixing screw between the battery box 18 and the case 15 is removed. Then, the battery box 18 is removed from the case 15 while holding the battery cover 19 serving as a handle while the battery 14 is stored in the battery box 18. After removing the wiring 25 of the battery 14, the screws between the fixed edge portion 29 of the battery cover 19 and the fixed edge portion 28 of the battery box 18 are removed, and the individual batteries 14 are replaced.

[0006] As described above, the replacement work of the battery 14 is performed as follows.
A step of completely removing the uninterruptible power supply 13 from the rack 10, a step of removing the device cover 23 from the case 15, a step of removing the battery box 18 from the case 15, a step of removing the battery 14 together with the battery box 18, and a step of removing the battery from the battery box 18. Cover 1
After the step of removing the battery 9, the battery 14 is replaced for the first time. After replacement, assembly must be performed again in the reverse order of the above operations. As described above, the replacement of the battery 14 required a complicated and long time.

The current capacity of a general power connection device (power connector) for connecting the battery box 18 and the uninterruptible power supply 13 will be described. The current flowing through the battery 14 is, for example, 5 Ah × 0.2 C if charging at 0.2 C for a general capacity of 12 V and 5 Ah at the time of charging.
= 1 A, but when backing up as the uninterruptible power supply 13, if the output power factor is set to about 0.7 for an output of 1 kVA, the effective output power becomes 70
When the conversion efficiency is about 90% when the DC / DC converter circuit section is a non-insulated boost type and the conversion efficiency is about 85% when the DC / AC inverter section is a high-frequency insulation type, the following equation is obtained. Needs to perform power conversion of about 915W. 1000VA × 0.7 ÷ 0.9 ÷ 0.85 = 915W

On the other hand, six DC12V batteries 14 are connected in series to provide a DC voltage of 72V, and up to a terminal voltage DC60V of the battery 14 at backup (DC12V is 10V).
If used, a DC current of about 15 A is output from the battery 14 as shown in the following equation, and the power connection device (power connector) requires a large current capacity. 915W ÷ 60V = 15.25A

The reason why the six batteries 14 are connected in series is as follows.
It is determined from the step-up ratio and the exchange efficiency of the DC / DC converter circuit section and the overall price of the uninterruptible power supply 13 including the battery 14, and is a general number as the uninterruptible power supply 13 of 1 kVA. If the number is reduced, the output current capacity from the battery 14 further increases.

From these facts, the current capacity is 20 A
It is necessary to form a fitting connection between the battery box 18 and the case 15 of the uninterruptible power supply 13 using a corresponding floating rivet terminal.

In a conventional power connection device (power connector), there are many floating rivet types in which a mechanical dimensional margin is provided in a mounting portion of one of the terminals and a plurality of terminals are integrated and the whole is movable. Connector, but the current capacity is 5A ~ 1
It was as small as about 0 A and could not be used for the battery wiring part of the uninterruptible power supply 13.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide an uninterruptible power supply that can easily and reliably replace a battery in a short time. It is assumed that.

[0013]

SUMMARY OF THE INVENTION The present invention relates to an uninterruptible power supply 13 having a battery housing 16 and a power supply circuit housing 17 formed in a case 15 and a battery housing a battery 14 in the battery housing 16. The box 18 is provided so as to be able to move forward and backward, and the contact socket 32 of the power connection device 30 provided in the direction of movement of the battery box 18 is attached to the battery box 18. The contact pins 31 are attached and these contact sockets 32
And one of the contact pins 31 is attached with play and the other is fixedly attached.
8 is a power supply device using a power connection device, wherein a contact socket 32 and a contact pin 31 are brought into contact with and separated from each other in accordance with the movement of the contact socket 8 into and out of the battery storage section 16.

In the case of replacement of the battery 14, after stopping the uninterruptible power supply 13, the battery box 18 is moved to the case 1.
Remove from 5. When the battery box 18 is taken out frontward, the contact socket 32 comes off from the contact pin 31 of the power connection device 30 and is electrically separated. Therefore, without removing the case 15 from the rack 10, removing the device cover 23 of the case 15, or removing the connector 24, the removed battery box 1 is removed.
Replace the old battery 14 in 8 with a new one. The entire battery box 18 can be replaced with a new battery 14. After replacement, the battery box 18
Is inserted into the case 15 to be electrically connected.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The apparatus of the present invention can be used to pull out an uninterruptible power supply
3 without removing the device cover 23 from the battery storage portion 16 of the case 15.
Can be electrically connected / disconnected by the power connection device 30 just by directly attaching / detaching the battery 14, and the battery 14 can be easily and reliably replaced.

Hereinafter, the present invention will be described in detail with reference to the drawings. FIG.
In the figure, reference numeral 15 denotes a case of the uninterruptible power supply 13, and this case 15 includes a bottom plate 27, a back plate 21, a front plate 20, a battery front plate 33, a device cover 23, and the like. The battery compartment 16 and the power supply circuit compartment 17 are partitioned.

The power supply circuit housing 17 has a DC / DC converter circuit and the like mounted therein, and has contact pins 31 of the power connection device 30 mounted on the pin mounting pieces 51 in the battery housing 16. Is connected to the circuit section in advance, and is covered with a device cover 23. The device cover 23 is not removed even when the battery 14 is replaced.

A battery box 18 is inserted into and pulled out of the battery housing 16 from the front side. The battery box 18 includes a right side plate 34, a left side plate 35, a front edge portion 36, and a rear edge portion 37. When a plurality of batteries 14 are stored, the battery box 18 is held so as not to rattle. The electrode 38 of the battery 14 faces the electrode escape notch 40 of the right side plate 34, and is sequentially connected by the battery wiring 25. Further, two contact sockets 32 are attached to the socket attaching piece 42 on the outer side of the right side plate 34 in the inserting and removing directions.
Are connected to the electrodes 38 at both ends of the battery 14 by the battery wiring 25. After the battery 14 is stored in the battery box 18 thus configured, the locking projections 44 of the battery cover 19 are fitted into the locking holes 41 of the right side plate 34, and the fixed edges 45 and 43 are screwed. Fix with.

In this state, when the battery box 18 is inserted into the battery storage section 16 from the front, the right side plate 34 of the battery box 18 is guided by the guide rails 46 and sent inside, and the rear end of the battery box 18 is The positioning piece 47 is positioned while being guided, and the locking projection 39 is inserted into the locking hole 48 to be set at an accurate position.

At the same time, the contact pins 31 of the pin mounting pieces 51 and the contact sockets 3 of the socket mounting pieces 42
2 are fitted and electrically connected. At this time, as will be described later, the contact socket 32 is
2 has a play because it is loosely fitted, and the insertion pin 57 of the contact pin 31 is hemispherical, so that the connection can be easily and reliably made.

When the battery box 18 is in the battery housing 1
After it is completely inserted into 6, the front edge 36 is fixed to the battery box mounting piece 49 with screws. Further, the battery front plate 33 is fitted into the front surface of the battery housing portion 16 and fixed to the battery front plate mounting piece 50 by screws.

In the case of replacing the battery 14, after stopping the uninterruptible power supply 13, the battery front plate 33 is removed from the battery front plate mounting piece 50, and the front edge 36 is removed from the battery box mounting piece 49. When the battery box 18 is pulled out forward, the contact pins 3
The contact socket 32 comes off from 1 and is electrically separated. The battery 14 can be replaced by removing the battery cover 19 from the drawn battery box 18. The entire battery box 18 can be replaced with a new battery 14. Therefore, as in the conventional case, the case 15 is pulled out of the rack 10 or the device cover 2 of the case 15 is removed.
Without removing 3 or connector 24,
The battery 14 can be replaced.

Next, a detailed configuration of the power connection device 30 including the contact pins 31 and the contact sockets 32 will be described. The contact pin 31 shown in FIG. 3A is obtained by covering a part of the outer periphery of a pin electrode portion 56 made of a conductive metal round bar such as brass with an insulating portion 62. The insertion pin 57 has a hemispherical shape, and has a constricted portion 58 slightly inward from the insertion pin 57.
Then, an elastic contact piece 59 is put on the constricted portion 58, and a connection terminal portion 63 is formed on the other end of the pin electrode portion 56.

The elastic contact piece 59 is used to improve the electrical contact with the contact socket 32.
(B) As shown in (c), a metal plate of about 0.2 mm thickness having conductivity and elasticity, such as beryllium copper, is cut into a diamond shape, and a large number (specifically, 6 to 12) ) Is cut into a cylindrical shape and the central portion is rounded so as to form a bulging portion 60.
9 is fitted into the constricted portion 58 of the pin electrode portion 56.

The contact socket 32 shown in FIG.
Is formed by coating an insulating portion 55 on one end of an outer peripheral portion of a socket electrode portion 52 made of a conductive metal cylinder, and forming an insertion hole 53 that contacts the elastic contact piece 59 of the contact pin 31 from this one end portion. A connection terminal 54 is formed on the other end.

When the contact pin 31 is inserted into the insertion hole 53 of the contact socket 32 thus formed from the insertion pin 57 side, since the insertion pin 57 has a hemispherical shape, it is easily guided to the insertion hole 53. The bulging portion 60 of the elastic contact piece 59 is pressed into the inner wall of the insertion hole 53. At this time, since the cut groove 61 of the elastic contact piece 59 is formed obliquely in the vertical direction, by sliding over a larger portion of the inner wall of the insertion hole 53, the contact is good and the electric resistance is reduced, and a large current is reduced. Can be shed. Incidentally, by applying gold plating or the like to the contact pins 31 and the contact sockets 32 as necessary, a terminal having a contact resistance of about 0.4 mΩ with respect to a passing current of 25 A could be realized.

The contact pin 3 configured as described above
1 and the contact socket 32 are shown in FIGS.
As shown in the figure, the pin mounting piece 51 and the socket mounting piece 4
2, the contact pin 31 is fixed to the pin mounting piece 51 without play since the contact pin 31 is mounted on the partition plate 22 of the case 15 on the fixed side. Because it is attached to the right side plate 34 of the battery box 18 which is the side,
When the battery box 18 is attached to the socket attachment piece 42, the battery box 18 is attached with some play so that the displacement at the time of insertion can be absorbed.

A jig as shown in FIG. 5 is used to assemble the contact pins 31 and the contact sockets 32 into the pin mounting pieces 51 and the socket mounting pieces 42, respectively. First, in the case of the contact pin 31, the pin mounting piece 51 is inserted into the pin assembly hole 65 of the assembly jig 64.
With the insulating portion 62 facing the contact hole 78, the guide pin portion 74 of the first press fitting 70 is inserted into the insulating portion 62, and the upper end of the first press fitting 70 is hit, At the first end 72 at the lower end, a ridge on the outer periphery of the insulating portion 62 is pressed into the close contact hole 78. Next, the pin electrode portion 56
Into the insulating portion 62, cover the insertion pin 57 with the pin escape hole 75 of the second press-fitting tool 71, and
The pin electrode portion 56 is press-fitted into the insulating portion 62 at the portion. In this manner, the contact pin 31 is fixedly attached to the pin attachment piece 51.

Next, in the case of the contact socket 32, the first washer 68 is fitted into the washer assembling hole 67 at the upper end of the socket assembling hole 66 of the assembling jig 64. Is placed facing the socket assembling hole 66, and the second washer 69 is further placed thereon. At this time, the washer assembly hole 67
Is formed to be slightly deeper than the thickness of the first washer 68, so that a gap 79 is formed between them. The holes of the first washer 68 and the second washer 69 are slightly smaller than the ridges on the outer periphery of the insulating portion 55 so as to be pressed into the insulating portion 55.
The second loose fitting hole 77 is slightly larger than the ridge on the outer periphery of the insulating portion 55 so as to be a play portion. First washer 6
8 and the burr-free portion of the hole of the second washer 69 is set upward.

The reason for defining the burr direction of the washers 68 and 69 is to increase the fitting force between the insulating portion 55 of the contact socket 32 and the press-fitting portions of the washers 68 and 69 to increase the mechanical strength. First and second washers 6
The sum of the distances between the sockets 8 and 69 and the socket mounting piece 42 is preferably 0.2 mm to 0.3 mm so that the contact socket 32 on the battery box 18 and the contact pin 31 on the case 15 can be satisfactorily fitted while centering. Optimal.

In such a setting state, the guide pin portion 74 of the first press-fitting tool 70 is inserted into the insulating portion 55, and the upper end of the first press-fitting device 70 is hit. Are pressed into the holes of the second washer 69 and the first washer 68. At this time, since the loose fitting hole 77 is larger than the insulating portion 55 and has the gap 79, the socket mounting piece 42 has a play in all directions.
Next, the socket electrode part 52 is inserted into the insulating part 55,
Insert the guide pin portion 74 of the first press-fitting tool 70, and
The socket electrode part 52 is press-fitted into the insulating part 55 at the end 73. In this manner, the contact socket 32 is attached to the socket attachment piece 42 with play.

In the above embodiment, the contact socket 32 on the battery box 18 side is mounted with play, and the contact pin 31 on the case 15 side is fixedly mounted.
However, the present invention is not limited to this. Conversely, the contact socket 32 on the battery box 18 side may be fixedly mounted, and the contact pin 31 on the case 15 side may be mounted with play.

[0033]

(1) The contact pin 31 of the power connection device 30 covers the pin electrode portion 56 made of a conductive metal rod with the insulating portion 62, and is slightly inside the insertion pin 57 at one end of the pin electrode portion 56. A constricted portion 58 is formed in the direction, and a plurality of diagonally vertical cutting grooves 61 are formed in a metal plate having conductivity and elasticity in the constricted portion 58 to form a cylindrical shape. The contact socket 32 is formed by covering the elastic contact piece 59 which is rounded so that
It is inserted into the contact pin 31 while being easily guided, and is pressed into the inner wall. At this time, the cut groove 6 of the elastic contact piece 59
Since 1 is formed obliquely in the vertical direction, by sliding over a larger area of the inner wall of the contact socket 32, good contact is achieved, electric resistance is reduced, and a large current can flow. Incidentally, a terminal having a contact resistance of about 0.4 mΩ with respect to a passing current of 25 A could be realized in the contact pin 31 and the contact socket 32.

(2) Since one of the attachment of the contact socket 32 to the battery box 18 and the attachment of the contact pin 31 to the case 15 is provided with play, and the other is fixedly attached, the power is reduced. Connection device 3
0 realizes a floating terminal of a large current, and by using this, the battery replacement operation of the uninterruptible power supply 13 can be performed by removing only the fixing screws of the battery box 18, thereby easily removing the battery box 18. Thus, the work of replacing the battery 14 or the work of replacing the entire battery box 18 can be performed in a short time.

(3) A battery box 18 is provided in the battery housing 16 so that it can be inserted and pulled out from the front side of the case 15. After a plurality of batteries 14 are housed in the battery box 18, the battery cover 19 Of the locking protrusion 4 of the side plate 34 of the battery box 18.
1 and the fixed edge 45 of the battery cover 19 and the fixed edge 43 of the battery box 18 are fixed.
Of the power connection device 30 to the socket mounting piece 42 outside the
The two contact sockets 32 of the power connection device 30 are attached to the battery housing portion 16 side of the case 15 with the two contact pins 31 of the power connection device 30 and the battery box A guide rail 46 for inserting and removing the battery 18 from the front into and out of the battery housing 16, a positioning piece 47 for positioning the rear end of the battery box 18, and a locking projection 39 of the battery box 18 are fitted. And the contact socket 32 and the contact pin 31 are attached with play, and the battery box 1
The contact socket 32 and the contact pin 31 are brought into contact with and separated from each other when the case 15 is moved into and out of the battery storage section 16 from the front side of the case 15.
Without removing the unit 1 from the rack 10 or removing the device cover 23 of the uninterruptible power supply 13.
5, the battery box 18 can be electrically connected and detached by the power connection device 30 only by directly attaching and detaching the battery box 18 from the battery storage section 16, and the battery 14 can be easily and reliably replaced.

[Brief description of the drawings]

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

FIG. 2 is a front view showing a connection state between a contact pin 31 and a contact socket 32 of the power connection device 30 according to the present invention.

3A and 3B show a contact pin 31 and a contact socket 32 according to the present invention, wherein FIG. 3A is a perspective view of the contact pin 31 with a part cut away, and FIG.
9, (c) is a front view of the elastic contact piece 59,
(D) is a perspective view of the contact socket 32 with a part cut away.

FIG. 4 is a front view showing a state in which two (+ and-) contact pins 31 and a contact socket 32 of the power connection device 30 according to the present invention are not connected.

FIG. 5 is an explanatory view of a state in which the contact pin 31 and the contact socket 32 of the power connection device 30 according to the present invention are assembled by holding an assembly jig 64;

FIG. 6 is an exploded perspective view of a conventional power connection device and a power supply device.

FIG. 7 is a perspective view of a state where the uninterruptible power supply 13 is housed in a rack 10.

[Explanation of symbols]

10 rack, 11 microcomputer, 12 display unit, 13
Uninterruptible power supply, 14 ... battery, 15 ... case, 16
... Battery storage section, 17 ... Power supply circuit storage section such as inverter, 18 ... Battery box, 19 ... Battery cover,
20 front plate, 21 back plate, 22 partition plate, 23 device cover, 24 connector, 25 battery wiring, 26
... fixed edge, 27 ... bottom plate, 28 ... fixed edge, 29 ... fixed edge, 30 ... power connection device, 31 ... contact pin, 3
2 contact socket, 33 battery front plate, 34
Right side plate, 35 ... Left side plate, 36 ... Front edge, 37 ... Rear edge,
38: electrode, 39: locking projection, 40: electrode escape notch, 41: locking hole, 42: socket mounting piece, 43: fixed edge, 44: locking projection, 45: fixed edge, 46: guide rail, 47: alignment piece, 48: locking hole, 49:
Battery box mounting piece, 50: Battery front plate mounting piece, 51: Pin mounting piece, 52: Socket electrode section, 53
... insertion holes, 54 ... connection terminal parts, 55 ... insulation parts, 56
... pin electrode part, 57 ... insertion pin, 58 ... constricted part,
59 ... elastic contact piece, 60 ... bulging part, 61 ... cut groove, 62
... Insulating part, 63 ... Connection terminal part, 64 ... Assembly jig, 65
... Pin assembly hole, 66 ... Socket assembly hole, 67 ... Washer assembly hole, 68 ... First washer, 69 ... Second washer, 70 ... First press-fitting tool, 71 ... Second press-fitting tool, 7
2. First end portion 73 Second end portion 74 Guide pin portion
75 ... pin escape hole, 76 ... end, 77 ... loose fitting hole, 78 ...
Close contact hole, 79 ... gap.

Claims (5)

[Claims] In a power connection device comprising a contact pin and a contact socket, the contact pin covers a part of an outer periphery of a pin electrode portion made of a conductive metal rod with an insulating portion. Pin electrode section 56
A constricted portion 5 slightly inward from the insertion pin 57 at one end of the
8, a plurality of oblique vertical cutting grooves 61 are formed in a metal plate having conductivity and elasticity in the constricted portion 58 to form a cylindrical shape, and a central portion of the cylindrical portion is formed as a bulging portion. 60. A power connection device comprising an elastic contact piece 59 which has been rounded to 60. 2. An uninterruptible power supply 13 having a battery housing 16 and a power supply circuit housing 17 formed in a case 15.
A battery box 18 containing the battery 14 is provided in the battery storage section 16 so as to be able to move forward and backward, and a contact socket 32 of a power connection device 30 provided in the battery box 18 in a direction in which the battery box 18 moves forward and backward. Attach with play, on the case 15 side,
The contact pin 31 of the power connection device 30 is fixedly attached, and the battery housing 1 of the battery box 18 is
6. A power supply device using a power connection device, wherein the contact socket 32 and the contact pin 31 are brought into contact with and separated from each other as the vehicle advances and retreats to 6. 3. An uninterruptible power supply 13 having a battery housing 16 and a power supply circuit housing 17 formed in a case 15.
A battery box 18 containing the battery 14 is provided in the battery storage section 16 so as to be able to move forward and backward, and a contact socket 32 of a power connection device 30 provided in the battery box 18 in a direction in which the battery box 18 moves forward and backward. The contact pin 31 of the power connection device 30 is attached with play to the case 15 side, and the battery housing 1 of the battery box 18 is fixed.
6. A power supply device using a power connection device, wherein the contact socket 32 and the contact pin 31 are brought into contact with and separated from each other as the vehicle advances and retreats to 6. 4. An uninterruptible power supply 13 having a battery housing 16 and a power supply circuit housing 17 formed in a case 15.
A battery box 18 is inserted into and pulled out of the battery housing 16 from the front side of the case 15. After a plurality of batteries 14 are stored in the battery box 18, a battery cover 19 is locked. Projection part 4
4 is fitted into the locking hole 41 of the side plate 34 of the battery box 18, and the fixed edge 45 of the battery cover 19 and the fixed edge 43 of the battery box 18 are fixed.
The two contact sockets 32 of + and-of the power connection device 30 are attached to the socket attachment pieces 42 outside the case 4 in the forward and backward directions of the battery box 18.
Of the power connection device 30 in the battery storage unit 16
And two contact pins 31; a guide rail 46 for inserting and removing the battery box 18 into and out of the battery storage section 16 from the front; an alignment piece 47 for positioning the rear end of the battery box 18; A locking hole 48 for fitting and holding the position of the locking projection 39 of the box 18 is provided. Either the contact socket 32 or the contact pin 31 is attached with play, and the battery of the battery box 18 is mounted. A power supply device using a power connection device, wherein a contact socket (32) and a contact pin (31) are brought into contact with and separated from each other as the case (15) advances and retreats from the front side of the case (15) to the storage part (16). 5. After the battery box 18 is completely inserted into the battery storage section 16 of the case 15, the front edge 36 of the battery box 18 is fixed to the battery box mounting piece 49 of the case 15, and The power supply device using the power connection device according to claim 4, wherein the plate (33) is fitted into the front surface of the battery storage part (16) of the case (15) and fixed to the battery front plate mounting piece (50).