JPH0480506B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to the structure of a battery storage case.

BACKGROUND OF THE INVENTION Batteries used in cameras and the like are required to have high performance and can be used for long periods of time and can drive large loads such as motors.

Based on these demands, we developed high-performance batteries that are small, large capacity, have low self-discharge properties, and have a long lifespan.
For example, a graphite fluoride lithium battery has been developed, but since this battery is capable of discharging a strong current of up to 1 ampere or more, if the positive and negative electrodes of the battery are short-circuited intentionally or accidentally, a large current will suddenly flow. The battery generates heat due to the flow of water, and if the short circuit continues, there is a risk of fire or explosion.

On the other hand, many recent devices such as cameras use ICs. For this reason, if a battery is loaded into a device with its positive and negative electrodes reversed intentionally or accidentally, not only will the device not work, but there is a risk that the IC will be destroyed.

Furthermore, if a device that uses multiple batteries is loaded with the electrodes of some of the batteries reversed, reverse charging may occur and an accident such as an explosion may occur.

For this reason, conventionally, general consumers are not allowed to replace the batteries in devices that use batteries as mentioned above, and only the manufacturer of the device can replace them. It has become very inconvenient for people.

Purpose The present invention was made in order to eliminate the above-mentioned inconvenience, and its purpose is to prevent fires, explosions, and equipment damage caused by general consumers handling the above-mentioned batteries. This is to prevent destruction from occurring.

Summary The present invention provides a battery storage case for storing large-capacity batteries that poses a risk of an accident due to short circuit or reverse loading, which is provided with an opening or a connecting portion that communicates between the battery electrode and the outside of the case. , the electrode part can be electrically connected to the outside only through the opening or the connection part, and the electrode part or the connection part is arranged inside the outer surface of the outer wall of the case,
It is characterized by preventing short circuits.

Furthermore, a recess is formed along one of the two spaces formed between two cylindrical batteries, and the protrusion of the device is inserted into this recess. It is characterized by preventing reverse loading.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the present invention, the battery is stored in a battery storage case before being sold, so that the consumer does not directly handle the battery. 1 to 3 show a first embodiment of the present invention. 1 is a large-capacity battery that has the risk of explosion if short-circuited. Two batteries are arranged in parallel so that both electrodes face in opposite directions, and one end of each battery is connected to the other electrode. A conductor metal 2 is welded to connect the two batteries, and both batteries are connected in series. Reference numeral 3 denotes a battery storage case, which is divided into upper and lower halves to accommodate the battery 1. The battery storage case 3 holds the batteries, and has narrow openings 3b and 3c with different opening diameters on the top surface (outer wall) of the upper part 3a at positions corresponding to the positive and negative electrodes of the battery 1 to be stored. It is formed to penetrate the surface. In addition, the battery storage case 3 has a recessed portion formed along the outer shape of two batteries arranged in parallel on only one side, and the recessed portion allows the battery storage case 3 to be placed in a device 10 such as a camera.
(hereinafter referred to as the device) is formed with a stepped portion 3d so that it can be inserted only in the correct direction. When storing the battery 1, the battery 1 is first inserted into one of the upper and lower halves of the battery storage case 3, and the other is fitted and the upper and lower parts are fixed so that they cannot be separated, and then sold to general consumers. . As described above, when the battery 1 is handled by a consumer, it is almost completely covered by the battery storage case 3, and the electrode parts 1a and 1b are arranged at the top so that they can contact the outside only through the narrow openings 3b and 3c. It is located inside the surface (outer wall) and will not be accidentally short-circuited. In addition, when selling the battery storage case 3, if a label made of paper or the like is pasted on the top of the battery storage case 3 so as to cover the narrow openings 3b and 3c, it will be safer to handle the battery before use, and it will prevent garbage. It can also prevent the intrusion of Device 10
Connecting pins 11 and 12 supported by biasing springs 15 and 16 are installed in the battery chamber 10a, and a reverse insertion prevention protrusion is provided at a position that fits into the stepped portion 3d when the battery storage case 3 is loaded. 10b is provided, and the battery storage case cannot be loaded unless the stepped portion 3d and the reverse insertion prevention protrusion 10b face each other. The connecting pins 11 and 12 are formed with different thicknesses to correspond to the diameters of the narrow openings 3b and 3c provided in the battery storage case 3, respectively, so that even if you try to load the battery storage case 3 in the opposite direction, the connection pins will not work. Relatively thick connection pin 12 of 12 and 11
is the narrower opening 3c of the narrower openings 3b and 3c.
The electrodes of the battery 1 and the connecting pins 11 and 12 are not connected. Therefore, in a device in which a plurality of battery storage cases 3 are electrically connected in series and used, the battery compartment is arranged so that the stepped portion 3d of one battery storage case faces another battery storage case and is loaded. is configured, the battery storage case cannot control the loading direction by the step part and the reverse insertion prevention protrusion, and it is possible that the battery case will be loaded in the opposite direction.However, even in such a case, no current will flow and the battery will not flow. It is possible to prevent heat generation and explosion accidents caused by current flowing into the low voltage battery due to the potential difference between the two.

In this way, the stepped portion 3d of the battery storage case 3, the reverse insertion prevention protrusion 10b, the connecting pins 11, 12, and the narrow openings 3b, 3c function as a dual reverse insertion prevention device, thereby preventing accidents caused by incorrect loading.

When loading the battery storage case 3 into the battery compartment 10a of the device 10, first insert the battery storage case 3 in the direction in which the stepped portion 3d and the reverse insertion prevention protrusion 10b face each other. 10b
The battery is guided into the battery compartment 10a while its direction is restricted. When the battery storage case 3 is further pushed in, the thinner connecting pin 11 passes through the narrower opening 3b and comes into contact with the positive electrode 1a of the battery 1, and the thicker connecting pin 12 is formed relatively wider. It passes through the narrow opening 3c and comes into contact with the negative electrode 1b of the battery 1, and the biasing springs 15 and 16 are compressed. When the battery storage case 3 is completely loaded into the battery compartment 10a and the battery cover 14 is closed, the connection pins 11 and 12 are connected to the electrodes 1 of the battery 1 by the biasing forces of the biasing springs 15 and 16.
a and 1b, and the connection is maintained. When the battery cover 14 is opened to take out the battery storage case 3, a portion of the battery storage case 3 protrudes from the battery chamber 10a due to the biasing force of the biasing springs 15 and 16, making it extremely easy to take out the battery storage case 3.

FIG. 4 shows a second embodiment of the invention. In this embodiment, the electrodes 1a of the battery 1 are housed between the battery 1 and the openings 3b and 3c of the battery storage case 3,
1b and a connection pin provided on the device is provided, and a diode is used to prevent reverse flow of current. Reference numerals 4 and 5 are connection portions that abut connection pins provided on a device (not shown) through narrow openings 3b and 3c. The connecting portion 5 is formed integrally with an elastic contact piece 5a provided in the battery storage chamber 3e of the battery storage case 3, and is elastically connected to the negative electrode 1b of the battery 1. Further, the connecting portion 4 is connected via a diode 7 to a connecting member 6 which is elastically connected to the positive electrode 1a of the battery 1 through an elastic contact piece 6a. In this example, the first
As in the embodiment, it is possible to prevent short-circuiting of the electrodes 1a and 1b and incorrect loading of the battery storage case 3, and also to prevent low voltage even if there is a potential difference between the batteries when a plurality of battery storage cases 3 are connected in parallel. Since the diode 7 prevents current from flowing into the battery, it is possible to prevent the battery from overheating and exploding.

5 to 8 show a third embodiment of the present invention. In this embodiment, a contact protruding from the battery storage case 3 is provided, and a disconnectable contact piece is provided inside the case 3, and the contact piece is connected to the electrode of the battery 1 only when the case 3 is correctly loaded. The contact piece connected to the contact protruding from the battery case 3 is connected to allow current to flow. 2
Reference numerals 1 and 22 are electrode contacts that are installed so as to protrude from the top of the battery storage case 3, but as shown in FIG. Contact point 2
1 and 22 are never connected in reverse to the contacts on the device side. Figures 7 and 8 are inside the battery storage case 3.
As shown in the figure, first there is a connection member 27 which is elastically connected to the negative electrode 1b of the battery 1 and connected to the electrode contact 22, and a connection which is connected to the positive electrode 1a of the battery 1 by an elastic contact piece 6a. A member 6 is provided. Also, a connecting member 28 has one end fixed to the electrode contact 21, the other end forming a bent end 28a, and connected from the bent end 28a to the contact piece 29 via the diode 7. It is fixed to the inner wall of the battery storage case. Furthermore, the bent end 6 of the connecting member 6
The first contact piece 25a at one end contacts the contact piece 29, and the second contact piece 25b at the other end contacts the contact piece 29, thereby connecting the positive electrode 1a of the battery 1 and the electrode contact 21 of the battery storage case 3. A movable conductor contact piece 25 is installed for establishing a connected state. The conductor contact piece 25 is fixed to a switching member 24 supported by a biasing spring 23, and when the battery storage case 3 is not loaded into the device, the bias spring 23 closes the first contact part of the conductor contact piece 25. 25a and the bent end 6b of the connecting member 6 and between the second contact piece 25b and the contact piece 29 are separated, so the connecting member 6 and the contact piece 29 are not connected, and the electrode Even if the contacts 21 and 22 are connected in a short-circuited state, no current flows and no short-circuit occurs. The switching member 24 is arranged so as to be able to come into contact with the outside through an opening 3f provided to penetrate the top surface of the battery storage case 3.

In this embodiment, when loading the battery storage case 3 into the device (not shown), first insert the battery storage case 3 in the correct direction. ) passes through the opening 3f provided on the top surface of the battery storage case 3 and pushes the switching member 24 downward in the figure against the biasing force of the biasing spring 23. Note that even if an attempt is made to load the battery storage case 3 in the wrong direction, the mounting direction regulating pin will not be inserted into the opening 3f of the case 3 and will come into contact with the top surface of the case 3, making loading impossible.
When the switching member 24 moves downward in the figure, the conductor contact piece 25 moves together, and the first and second contact pieces 25a and 25b of the conductor contact piece 25 respectively contact the contact piece 29 of the connecting member 6. The positive electrode 1a of the battery 1 and the electrode contact 21 are connected. At this time, the colored tail part 24a of the switching member 24 is pushed by a mounting direction regulating pin (not shown), and the step part 3d of the battery storage case 3 is pushed.
It protrudes from the top to indicate that the positive electrode is connected. Further, when the battery storage case 3 is inserted into the device, the electrode contacts 21 and 22 come into contact with the contacts fixedly provided on the device side, and conduction is established, completing the loading.
When the battery storage case 3 is removed from the device, the contact between the mounting direction regulating pin and the switching member 24 is released, so that the switching member 2 is removed by the biasing force of the biasing spring 23.
4 and the conductor contact piece 25 move upward in the figure, and the first
Second contact pieces 25a, 25b and connection member 6 contact piece 29
The positive electrode 1a of the battery 1 and the electrode contact 21 are no longer connected. In this embodiment, short circuit between the electrodes 1a and 1b is prevented as described above, and an accident due to incorrect loading is prevented, and since the diode 7 is provided, a plurality of battery storage cases 3 can be connected in parallel as in the second embodiment. Accidents that may occur when connected and used can be prevented. Alternatively, a voltage detection circuit may be provided in place of the diode 7, and the switching circuit may disconnect the electrode contact 21 from the electrode 1a of the battery 1 when the voltage of the battery 1 drops below a specific level.

9 to 12 show a fourth embodiment of the present invention. In this embodiment, a shielding member is provided between the electrode of the battery and the opening of the battery storage case, so that when the battery storage case is loaded into the device, the shielding member is retracted to enable loading. Reference numeral 30 denotes a shielding member, which is supported by an integrally molded pin 30a in an opening 3g provided on the top surface of the battery storage case 3, and is connected to the openings 3b and 3c of the battery storage case 3.
It is pivoted so that it can rotate between a position where it blocks and a position where it opens. The shielding member 30 has an elastic piece portion 30c in contact with the inner wall of the battery storage case 3, and a finger portion 30b.
The battery storage case 3 protrudes from an opening 3h provided in a portion of the outer wall portion of the case 3 that forms a stepped portion 3d, that is, a portion facing a storage direction regulating member 53 of a camera 50, which will be described later, and faces the opening 3h. The shielding member 30 is stopped in contact with the outer wall portion forming the stepped portion 3d, and in this state, the shielding member 30 shields the openings 3b and 3c on the top surface of the battery storage case 3 as shown in FIG. 12A. . In this embodiment, when loading the battery storage case 3 into the battery compartment 51 of the camera 50, after opening the battery cover 52 of the camera 50 shown in FIG. 5
1, into the battery chamber 51 in the direction facing the storage direction regulating member 53 provided inside the battery chamber 51, that is, with the stepped portion 3d facing downward in the figure and the top surface facing the left side in the figure. Note that the battery storage case 3 is prevented from being loaded in the wrong direction due to the storage direction regulating member 53. When the battery storage case 3 is guided by the storage direction regulating member 53 and placed into the battery chamber 51, the slope 53a of the storage direction regulating member 53
, the protruding portion of the finger portion 30b of the shielding member 30 is pushed, and the shielding member 30 rotates clockwise against the biasing force of the elastic piece portion 30c, so that the top of the battery storage case 3 is pushed as shown in FIG. 12B. The openings 3b and 3c in the surface are opened. When the battery storage case 3 is further pushed in, the connection pins 11 and 12 installed in the battery chamber 51 fit into the openings 3b and 3c, respectively, and the electrodes 1 of the battery 1 are inserted.
a and 1b and are connected. By closing the battery lid 52, the connection pins 11 and 12 are pressed against the electrodes 1a and 1b by the urging force of an urging spring (not shown), and the connection is maintained, as in the first embodiment. Similar to the first embodiment, when the battery cover 52 is opened to take out the battery storage case 3, a portion of the battery storage case 3 protrudes from the battery chamber 51 due to the urging force of the urging spring. In this embodiment, since a recessed portion 3i for removal is provided, it is possible to pull out by placing a finger on the recessed portion 3i, further facilitating removal. When the battery storage case 3 is removed, the shielding member 30 has an elastic piece 30c.
The finger portion 30b rotates counterclockwise due to the elastic biasing force of the opening 30h, and stops when the finger portion 30b comes into contact with the outer wall portion facing the opening 30h, as shown in FIG. 12A.
b, 3c are shielded. Therefore, in this embodiment as well, accidents caused by short circuits between the electrodes 1a and 1b and incorrect loading of the battery storage case 3 can be prevented.

13 to 16 show modifications of the fourth embodiment in which the shape and operation of the shielding member are different. As in the fourth embodiment, a portion of the shielding member protrudes from the opening 3h of the portion of the outer wall portion of the battery storage case 3 forming the stepped portion 3d, and is stopped therein.
The protruding portion is pushed by a storage direction regulating member provided inside the battery chamber, the shielding member is retracted, and the opening on the top surface of the battery storage case 3 is opened. In the example shown in FIG. 13, the shielding member 31,
32 is a pair of members 32, one end of which is pivotally supported by a pin 32a at a position closer to the negative electrode;
shields the positive electrode 1a, and a member 31 whose one end is pivotally supported by a pin 31a at a position near the positive electrode shields the negative electrode 1b, and each shielding portion and the pin 31a,
32a, and the intersecting portion protrudes outside the battery storage case 3 through the opening 3h to form signal portions 31b and 32b. When the signal parts 31b, 32b are pushed by the storage direction regulating member 53, the shielding members 31, 32 are moved to the pins 31a, 32a.
The electrode 1 of the battery 1 is rotated counterclockwise and clockwise, respectively, as shown in FIG.
b, open 1a. When the contact with the storage direction regulating member 53 is released, the shielding members 31 and 32 have elastic pieces 31c and 31c that are in contact with the inner wall of the battery storage case 3, respectively.
The electrodes 1b and 1 are rotated clockwise and counterclockwise by the biasing force of 32c and returned to their initial positions.
Shield a.

In the example shown in FIG. 14, the shielding members 33, 3
4 form a pair, and one end of each is connected to electrode 1.
b, 1a, and pins 33a, 34 in the middle.
It is pivotally supported by a, and the other end protrudes to the outside. A fixing pin 34 is attached to one of the ends protruding to the outside.
d, a bifurcated cam surface 33d is formed on the other side, and the fixing pin 34d and the bifurcated cam surface 33d engage with each other. When the signal portion 33b of the shielding member 33 is pushed by the storage direction regulating member 53, it is pushed by the bifurcated cam surface 33d and the fixed pin 34d rotates, causing the shielding member 33,
34 rotate clockwise and counterclockwise, respectively, to open the electrodes 1b and 1a. Storage direction regulating member 5
3 is released, the shielding member 33 moves back due to the biasing force of the elastic piece 33c and returns to the initial position, and the fixed pin 34d is pushed by the bifurcated cam surface 33d, and the shielding member 34 will return.

In the example shown in FIG. 15, the pair of shielding members 35 and 36 are coaxially supported on a common shaft 37, and one end portions 35b and 36b of each protrude as a signal portion and stop in contact with each other. The signal portions 35b and 36b are controlled by the storage direction regulating member 53.
When is pressed, the shielding members 35 and 36 rotate counterclockwise and clockwise, respectively, to open the electrodes 1b and 1a. When the contact with the storage direction regulating member 53 is released, the shielding members 35 and 36 move back by the urging force of the elastic pieces 35c and 36c and return to their initial positions.
The signal parts 35b and 36b come into contact and stop.

In the example shown in FIG. 16, the shielding member 38 shields the electrodes 1a and 1b at both ends, has an arm in the center, and the tip of the arm protrudes to form a signal part 38b. The arm part is configured to slide while being regulated by a pair of pins 39, 40 arranged to sandwich the signal part 38b and an opening 3h from which the signal part 38b projects. When the signal portion 38b is pushed by the storage direction regulating member 53, the shielding member 38 slides while being regulated by the pins 39, 40, and both ends are retracted from the electrodes 1a, 1b and opened. When the contact with the storage direction regulating member 53 is released, the shielding member 38 releases the elastic pieces 38c formed at both ends thereof.
It moves back by the urging force of , is stopped by a pair of pins 39 and 40, and returns to its initial position.

17 to 19 show a fifth embodiment of the present invention. In this embodiment, the shielding member 41 is installed between the battery storage case and the electrodes 1a and 1b of the battery 1, as in the fourth embodiment, but unlike the fourth embodiment, the shielding member 41 is installed in the device (not shown). Connecting pin 1
1 and 12 so that the shielding member 41 is retracted. As shown in FIG. 17, the shielding member 41 has a shape in which it is connected at the center and divided into two at both ends, and openings 41a and 41b are formed between the connected portion and both ends. In addition, a pair of pins 41c are provided at both ends of the connecting portion of the shielding member 41.
By fitting into the space formed between the battery storage case 3 and the two batteries 1 in which the pins 41d and the pins 41c and 41d are fixed, the shielding member 41 protects the electrodes 1a and 1a of the batteries 1, respectively. 1b and the openings 3b and 3c of the battery storage case 3. The surfaces that abut the connecting pins 11 and 12 at both ends of the two halves form a V-shaped groove, and are divided into two at the bottom of the V-shaped groove. The slopes 41e and 4 are in the opposite direction.
1f, 41g, and 41h. When the battery storage case 3 of this embodiment is loaded into a device (not shown), the connection pins 11 and 12 of the device first pass through the openings 3b and 3c of the case 3 and the shielding member 4 It comes into contact with both ends of the two halves. Next, as shown in FIG. 19B, the connecting pin 11,
Slopes 41e and 41f whose tips form a V-shaped groove
41g and 41h are pushed out and retracted to both sides, and the connecting pins 11 and 12 fit into the divided portions and come into contact with the electrodes 1a and 1b of the battery 1, thereby establishing a connection.
When you take out the battery storage case 3, the connection pins 11 and 12
is retracted, and the two parts of the shielding member 41 return due to the elastic force and come into contact with each other to close the divided parts and form a V-shaped groove again. As shown in the figure, since the openings 3b and 3c of the battery storage case 3 are provided with bent portions facing the inside of the case 3, the bent portions have slopes 41e and 41.
1f, 41g, and 41h come into contact and stop, shielding the electrodes 1a and 1b of the battery 1. As described above, in this embodiment as well, short-circuiting of the electrodes can be prevented as in the fourth embodiment.

20 to 21 show an example of the fifth embodiment described above, in which the shape and operation of the shielding member are different. The shielding member 43 is provided with a pin 43a at the center, and this pin 43a is supported at the center of the openings 3b and 3c on the top surface of the battery storage case 3.
Furthermore, slopes 43b and 43c are formed at both ends of the shielding member 43, respectively, and are inclined in opposite directions, and the slopes 43b and 43c face the openings 3b and 3c, respectively. The connection pins 11 and 12 are connected to the opening 3b,
3c and comes into contact with the slopes 43b, 43c, the ends of the slopes 43b, 43c are pushed in opposite directions, and the shielding member 43 rotates clockwise around the pin 43a and retreats from the electrodes 1a, 1b. , as shown in FIG. 21B, connecting pins 11 and 12
contacts the electrodes 1a and 1b to establish a connection. When the connecting pins 11 and 12 are retracted, the shielding member 43 closes the elastic piece 4 that is in contact with the inner wall of the battery storage case 3.
It rotates counterclockwise by the urging force of 3d,
As shown in FIG. 1A, it comes into contact with the bends provided at the top openings 3b, 3c of the battery storage case 3 and stops, thereby shielding the electrodes 1a, 1b of the battery 1.

Effects As described above, in the present invention, a battery that has a large capacity and high performance but is at risk of explosion or equipment destruction due to shorting of electrodes or reverse loading of the battery can be housed in a battery case. However, since the structure is such that the electrodes of the battery cannot be easily touched, accidents due to short circuits can be prevented.

In addition, we focused on the shape of this battery case, focusing on the fact that when two cylindrical batteries are lined up in parallel, two spaces are formed between them, and by making it a shape with a recess on one side, it is possible to reverse loading. This made it impossible.

Therefore, there is no risk of accidents even if special care is not taken in handling, and it is possible to obtain a battery that general consumers can handle with peace of mind.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view showing the first embodiment of the present invention, Fig. 2 is a vertical sectional view showing the same embodiment inserted into the battery chamber of the device, and Fig. 3 is a completed loading of the above embodiment. FIG. 4 is a vertical cross-sectional view showing the second embodiment of the present invention, FIG. 5 is an exploded perspective view showing the third embodiment of the present invention, and FIG. 6 is the same embodiment as above. FIG. 7 is an explanatory diagram showing the arrangement of the contact pieces in the embodiment same as the above, FIG. 8 is an explanatory diagram showing the arrangement state of the contact pieces in the embodiment same as the above, and FIG. FIG. 10 is a partially cutaway perspective view showing the battery chamber of a device using the fourth embodiment; FIG. 10 is an external perspective view of the same embodiment;
Fig. 1 is an exploded perspective view of the same embodiment, Fig. 12 is a cross-sectional view of the same embodiment, Fig. 13 is a transverse cross-sectional view showing a modification of the above embodiment, and Fig. 14 is another modification of the above embodiment. FIG. 15 is a cross-sectional view showing another modification of the above embodiment, FIG. 16 is a cross-sectional view showing another modification of the above embodiment, and FIG. 17 is a cross-sectional view showing another modification of the above embodiment. A perspective view of the main parts showing the inside of the fifth embodiment, the first
Figure 8 is a cross-sectional view showing the inside of the same embodiment as above;
The figure is a partial vertical cross-sectional view of the same embodiment, FIG. 20 is a perspective view of the main part showing the inside of a modification of the above embodiment, and
The figure is a partial longitudinal cross-sectional view of a modification of the above embodiment. DESCRIPTION OF SYMBOLS 1... Battery, 1a, 1b... Electrode part, 3... Battery storage case, 3b, 3c... Opening, 3d... Step part, 4, 5... Connection part, 7... Diode, 10
... Device, 10b ... Reverse entry prevention protrusion, 11, 12
... Connection pin, 21, 22 ... Electrode contact, 3
0, 31, 32, 33, 34, 35, 36, 3
8, 41, 43...shielding member, 53... storage direction regulating member.

Claims (1)

[Claims] 1. A holding part that holds two cylindrical batteries connected in series in parallel, and an opening facing the electrode of the battery held in the holding part or a battery held in the holding part. The battery has a connecting part connected to the electrode of the battery, and is formed so that connection between the outside and the electrode of the battery is possible only through the opening or the connecting part, and the battery faces the opening. An outer wall part formed in such a way that the electrode or the connection part connected to the electrode is located in a position retracted inward from the outer surface of the outer wall part, and two cylindrical batteries installed together to form an outer wall part between the two cylindrical batteries. A battery storage case characterized by having a recess formed along one of two spaces in which a protrusion formed on a device to be loaded can fit. 2. The battery storage case according to claim 1, wherein the recessed portion is formed with a stepped portion.