JP2006310061A - Underwater travelling vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an underwater travelling vehicle on which a storage battery for exchange cab be quickly and safely mounted, without requiring specific device for battery exchange, even on a boat. <P>SOLUTION: The underwater travelling vehicle is provided with a battery case 2 in which the battery 1 is stored, and a case-receiving part 3 formed on a body 10a of the underwater travelling vehicle, on which the battery case can be mounted detachably. The battery case 2 has a positive electrode terminal 6a and a negative electrode terminal 7a to be connected to the battery 1. The case-receiving part 3 has a terminal 11a for the positive electrode to be connected to the terminal 6a, when the battery case is mounted, and a terminal 12a for the negative electrode to be connected to the terminal 7a. Waterproof means 6, 7, 11, 12 waterproofing the terminal 6a connected to the terminal 12a and the terminal 7a connected to the terminal 12a for the negative electrode so that the positive electrode terminal and the negative electrode terminal can be insulated, even if the surroundings thereof are wetted. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an underwater vehicle such as an exploration device capable of self-propelled underwater or a torpedo target. More specifically, the present invention does not require a dedicated facility for battery replacement and can be replaced quickly and safely on a ship. It is related with the underwater vehicle which can attach the storage battery of to an underwater vehicle body.

  For example, Patent Documents 1 and 2 describe technologies related to a storage battery used in an underwater vehicle such as a probe or a torpedo target that travels underwater with its own power.

  In patent document 1, when installing the storage battery for propulsion of an underwater vehicle in the power supply room of an underwater vehicle, the outer skin of this power supply room and the battery case in which a storage battery is stored are shared. That is, the storage battery is directly stored in the outer skin of the power supply chamber, and the outer skin and the storage battery are integrated. Further, the power supply chamber is provided with a maintenance port at the top of the outer skin, and the maintenance port can be opened and closed with a lid. This makes it possible to eliminate the work of removing the battery case from the power supply room when carrying out maintenance work such as discharging the remaining capacity of the storage battery and charging after running the underwater vehicle, and maintenance is performed simply by removing the lid. Can work. Furthermore, since the outer skin of the power supply chamber and the storage battery are integrated, the strength against vibration and impact is increased.

In Patent Document 2, when electricity is supplied to the storage battery, the storage battery is heated by causing both electrodes of the storage battery to conduct through the current limiting resistor, and then the power is actually supplied to the load. Thereby, since the storage battery supplies electric power to the load in a warmed state, a large electromotive force can be output to the load from the start of power supply.
Japanese Patent Laid-Open No. 8-339791 "Rechargeable battery for underwater vehicle" JP 2003-153458 A "Power Supply Method from Storage Battery and Power Supply Circuit from Storage Battery"

  In the case of Patent Document 1, the storage battery is replaced by removing the storage battery from the power supply chamber outer skin of the underwater vehicle. Then, when the replaced new storage battery is incorporated in the power supply chamber and the maintenance port of the power supply chamber is covered, the power supply chamber is evacuated and nitrogen gas is sealed in the power supply chamber for explosion prevention and drying. In other words, in order to assemble a power supply chamber in which a storage battery is incorporated, work such as evacuation and nitrogen filling and dedicated equipment for the work are required, so battery replacement is usually performed in land facilities.

  When this battery is exchanged on the ship, work space and dedicated equipment such as removal of the storage battery, evacuation and nitrogen filling are required, and there is a risk of the storage battery getting wet and short-circuiting. Battery must be changed after drying in the cabin. Therefore, when the battery is replaced on the ship, the number of times that the underwater vehicle can be sailed in one day is limited due to the inconvenience of battery replacement. It is not practical to replace the battery. In addition, the invention described in Patent Document 2 is not intended to facilitate battery replacement on a ship.

  Under such circumstances, conventionally, the replacement of the storage battery for the underwater vehicle has been performed at a facility equipped with land-based dedicated equipment, and the battery could not be quickly replaced on board.

  Accordingly, an object of the present invention is to provide an underwater vehicle capable of attaching a replacement storage battery to an underwater vehicle body quickly and safely on a ship without the need for dedicated battery replacement equipment. There is.

  In order to achieve the above object, according to the present invention, an underwater vehicle on which a storage battery for power supply is replaceably attached, the battery case containing the storage battery inside, and the main body of the underwater vehicle A case receiving portion to which the battery case is detachably attached, and the battery case includes a positive electrode terminal connected to a positive electrode of the storage battery and a negative electrode terminal connected to a negative electrode of the storage battery. The case receiving portion includes a positive power receiving terminal connected to the positive terminal and a negative power receiving terminal connected to the negative terminal, respectively, when the battery case is attached to the case receiving portion. The positive terminal connected to the power receiving terminal for the positive electrode and the negative terminal connected to the power receiving terminal for the negative electrode, even if the periphery of the positive terminal and the negative terminal is wet, Absolute When the battery case is attached to the case receiver, before the waterproofing, at least one of the positive electrode terminal and the positive electrode of the storage battery, and the negative electrode terminal and the negative electrode of the storage battery is Short-circuit preventing means for connecting the positive terminal and the positive electrode of the storage battery and connecting the negative terminal and the negative electrode of the storage battery after being disconnected and waterproofed, An underwater vehicle is further provided.

  In this underwater vehicle, since both the positive terminal and the negative terminal are connected to the storage battery after the positive terminal and the negative terminal are waterproofed, the battery case is attached to the underwater vehicle body. Sometimes, even if the case receiving part or the battery case is wet, it is possible to reliably prevent a short circuit from occurring between the positive electrode terminal and the negative electrode terminal. Moreover, a new storage battery can be attached to the underwater vehicle body simply by attaching the battery case to the case receiver. Therefore, it is possible to attach the replacement storage battery to the underwater vehicle body quickly and safely on the ship without the need for dedicated battery replacement equipment.

  According to a preferred embodiment of the present invention, the short-circuit preventing means is provided in the case receiving portion and the battery case, and the battery case is attached to the case receiving portion. The actuated part that is actuated by the motor and the actuated part are actuated so that the positive electrode terminal and the positive electrode of the storage battery are connected, and the negative electrode terminal and the negative electrode of the storage battery are connected. A switch part to be mounted, the positive electrode terminal, the negative electrode terminal, the positive and negative power receiving terminals, the operating part, the actuated part, and the mounting position of the waterproof means are attached to the case receiving part. It is determined that the operation is performed after the waterproofing during the movement.

  This mounting position activates the actuated part after the positive electrode terminal and the negative electrode terminal are waterproofed, and the positive electrode terminal, the negative electrode terminal, and the storage battery are electrically connected. A short circuit between the positive electrode terminal and the negative electrode terminal can be reliably prevented.

  Further, according to a preferred embodiment of the present invention, the short-circuit prevention means is provided in the battery case and the operation part provided in the case receiver, and when the battery case is attached to the case receiver, An actuated part that is actuated by the actuating part, a timer part that starts counting time by actuation of the actuated part, and a connection between the positive electrode terminal and the positive electrode of the storage battery after a predetermined time has elapsed from the start of counting And a switch part for enabling connection between the negative electrode terminal and the negative electrode of the storage battery.

  Thus, if the predetermined time for the timer to expire is set to be longer than the time required for the installation work, the positive terminal and the negative terminal will not be short-circuited by waterproof means during installation. Can be installed.

  According to a preferred embodiment of the present invention, the waterproof means is a waterproof connector provided with the positive terminal, the negative terminal, the positive and negative power receiving terminals, and the short prevention means is provided in the battery case. A contact switch provided on the case receiving portion; and when the battery case is attached to the case receiving portion, a first operating portion that contacts the contact switch and closes the contact switch; and A connection switch having a pair of terminals provided; and provided in the case receiver, and when the battery case is attached to the case receiver, the connection is made to the pair of terminals to short-circuit the pair of terminals. When both the second operating part that closes the switch and both the contact switch and the connection switch are closed, the positive electrode terminal and the positive electrode of the storage battery are contacted. And a switch part that allows the negative electrode terminal and the negative electrode of the storage battery to be connected, and the positive electrode terminal, the negative electrode terminal, the positive and negative power receiving terminals, the contact switch, and the connection switch. The mounting positions of the first and second actuating parts and the waterproof means are such that both the contact switch and the connection switch are closed after the waterproofing is performed while the battery case is attached to the case receiving part. Determined.

  If both of the two contact switches and the connection switch having the short-circuit prevention function are not activated, the positive terminal, the negative terminal and the storage battery are not electrically connected, so that the safety when the battery case is attached is further increased.

  As described above, according to the present invention, the positive electrode terminal, the negative electrode terminal, and the storage battery are not electrically connected unless the positive electrode terminal and the negative electrode terminal are waterproofed by the waterproof means. When attaching to the case, even if the case receiving part or the battery case is wet, it is possible to reliably prevent a short circuit. Moreover, since a new storage battery can be attached to the underwater vehicle body simply by attaching the battery case to the case receiving portion, work can be performed quickly. Therefore, it is possible to attach the replacement storage battery to the underwater vehicle body quickly and safely on the ship without the need for dedicated battery replacement equipment.

  A preferred embodiment of the present invention will be described with reference to the drawings. In addition, the same code | symbol is attached | subjected to the common part in each figure, and the overlapping description is abbreviate | omitted.

  FIG. 1 is a diagram showing an underwater vehicle of the present invention that can quickly and safely change batteries on a ship. As shown in FIG. 1, the underwater vehicle 10 has a battery case 2 in which a storage battery is housed. The battery case 2 is attached to the case receiving part 3 by being fitted into a case receiving part 3 formed as a recess in the main body 10 a of the underwater vehicle 10. FIG. 2 is an enlarged view of the case receiving portion of FIG. In order to fix the battery case 2 to the case receiving portion 3, for example, as shown in FIGS. 1 and 2, a bolt may be inserted into the bolt hole 5 and tightened.

  FIG. 3 shows a circuit wired to the battery case 2. As shown in FIG. 3, the back surface 2a of the battery case 2 is provided with a positive waterproof connector 6 having a positive terminal 6a exposed to the outside and a negative waterproof connector 7 having a negative terminal 7a. The positive electrode terminal 6 a is connected to the positive electrode of the storage battery 1 housed in the battery case 2 via the power supply switch 9, and the negative electrode terminal 7 a is connected to the negative electrode of the storage battery 1. When the battery case 2 is attached to the case receiving part 3, the positive terminal 6a is connected to the positive power receiving terminal 11a incorporated in the waterproof connector 11 provided in the case receiving part 3 shown in FIGS. The negative terminal 7a is connected to a negative power receiving terminal 12a incorporated in a waterproof connector 12 provided in the case receiving portion 3, so that power can be supplied from the storage battery 1 to the underwater vehicle body 10a. .

  The waterproof connector used for the positive electrode terminal 6a will be briefly described. FIG. 4 shows a configuration example of the waterproof connector. In the example of FIG. 4, one waterproof connector 13 includes a connection terminal 13 a and a waterproof part 13 b made of rubber surrounding the periphery of the terminal. The other waterproof connector 14 also has an insertion hole 14a into which the connection terminal 13a is inserted, and a waterproof part 14b made of rubber surrounding the insertion hole 14a. When the connection terminal 13a is inserted into the insertion hole 14a and these waterproof connectors 13 and 14 are connected, the waterproof portions 13b and 14b come into close contact with each other so that water cannot enter the internal connection terminal 13a. ing. A conductive film is formed on the inner wall of the insertion hole 14a, and the connection terminal 13a comes into contact with the film to be electrically connected. In addition, the waterproof connector used by this invention is not limited to the example of FIG. 4, Other suitable waterproof connectors can also be used.

  The connection terminal 9a of the power supply switch 9 in FIG. 3 is normally connected to the off terminal 9c, and is excited from a later-described exciting coil to be connected from the off terminal 9c to the on terminal 9b, and the negative terminal 7a. And the negative electrode of the storage battery 1 are connected.

  In order to operate the power supply switch 9, the contact switch 16 and the connection switch 20 described below must be operated.

  As shown in FIG. 3, a contact switch 16 having a pair of terminals 16 a and 16 b is provided on the back surface 2 a of the battery case 2. When the battery case 2 is normally attached to the case receiving portion 3 of the underwater vehicle body 10a, the pair of terminals 16a and 16b are made of, for example, a contact made of a conductive material provided at a predetermined position of the case receiving portion 3. Contact with the plate 17 and short circuit with each other. That is, the contact switch 16 is in a closed state when the pair of terminals 16 a and 16 b come into contact with the contact plate 17.

  In order to operate the power supply switch 9, the connection switch 20 must be operated in addition to the contact switch 16. The connection switch 20 is configured by incorporating a pair of terminals 20a and 20b into the waterproof connector 20, and is provided on the back surface 2a of the battery case 2 so as to be exposed to the outside. The pair of terminals 20a and 20b of the connection switch 20 are a pair of short-circuit terminals incorporated in a waterproof connector 21 provided at a predetermined position of the case receiver 3 when the battery case 2 is normally attached to the case receiver 3. 21a and 21b. Since the short-circuit terminals 21a and 21b of the case receiver 3 are a pair of short-circuited terminals, the connection switch 20 is closed when the pair of terminals 20a and 20b of the connection switch 20 is connected to the short-circuit terminal.

  As described above, when the battery case 2 is normally attached to the case receiving portion 3, both the contact switch 16 and the connection switch 20 are closed. As a result, as understood from FIG. 3, current is supplied from the power source 23 to the timer relay 22. When a current is supplied to the timer relay 22, a timer incorporated in the timer relay 22 starts counting time, and when a predetermined time elapses, a current flows through the excitation coil incorporated in the timer relay 22, and the excitation coil is turned on. Excited. By the excitation of the exciting coil, the power supply switch 9 is operated so as to come into contact with the ON terminal 9b. That is, the connection terminal 9a of the power supply switch 9 is normally biased toward the off terminal 9c by a spring or the like, and is connected to the on terminal 9b by the magnetic force of the excited exciting coil. The diodes 24 and 25 in FIG. 3 are for preventing the occurrence of back electromotive force.

  According to the embodiment of the present invention, the positive terminal 6a, the negative terminal 7a, the contact switch 16 and the connection switch 20 provided in the battery case 2 and the power receiving terminals 11a and 12a provided in the case receiver 3 corresponding to these terminals. The attachment positions of the contact plate 17 and the short-circuit terminals 21a and 21b are determined as follows. When the battery case 2 is attached to the case receiving portion 3, the positive terminal 6a and the negative terminal 7a are first connected to the power receiving terminals 11a and 12a, respectively, and the positive terminal 6a and the negative terminal are connected by the waterproof connectors 6, 7, 11, and 12, respectively. The terminal 7a is waterproofed so as to be insulated even if its periphery is wet, and then the contact switch 16 comes into contact with the contact plate 17 to be closed, and finally the terminal of the connection switch 20 is connected to the short-circuit terminal. Thus, the attachment position is determined so that the connection switch 20 is closed.

  Therefore, after the positive electrode terminal 6a and the negative electrode terminal 7a and the positive and negative power receiving terminals 11a and 12a are waterproofed by the waterproof connectors 6, 7, 11, and 12, depending on the mounting position, the power supply switch 9 is Since it is closed, even when the case receiving part 3 or the battery case 2 is wet when the battery case 2 is attached, it is possible to reliably prevent a short circuit between the positive electrode terminal 6a and the negative electrode terminal 7a due to water. .

  At the time of attachment, the contact switch 16 and the connection switch 20 are sequentially operated after the positive electrode terminal 6a and the negative electrode terminal 7a are connected to the power receiving terminals 11a and 12a, respectively, and the positive electrode terminal 6a and the negative electrode terminal 7a are waterproofed. In order to make this smooth, the necessary ones of the positive terminal 6a, the negative terminal 7a, the power receiving terminals 11a and 12a, the contact switch 16, the contact plate 17, the connection switch 20, and the short-circuit terminals 21a and 21b are connected to the battery case 2. It can be attached to the battery case 2 or the case receiving part 3 via an elastic body such as a spring that can be elastically displaced so as to be displaced according to the contact pressure between the case receiving part 3 and the case receiving part 3.

  Further, when the battery case 2 is normally attached to the case receiving portion 3 as described above, the contact switch 16 and the connection switch 20 are closed, the timer in the relay timer is activated, and when a predetermined time elapses, the exciting coil As a result, the power supply switch 9 is closed. Therefore, if the predetermined time is set to be longer than the work time required for attaching the battery case 2 to the case receiving portion 3, even if the case receiving portion 3 is wet, power is supplied to the positive terminal 6a and the negative terminal 7a. Since it is not supplied, it is reliably prevented that the positive electrode terminal 6a and the negative electrode terminal 7a are short-circuited by water during the mounting operation.

  Next, the structure of the battery case 2 and the case receiving part 3 having the above functions will be described. FIG. 5 is a schematic diagram showing the configuration of the battery case 2. 5A is a vertical cross-sectional view of the battery case, FIG. 5B is a view taken along the line BB in FIG. 5A, and FIG. 5C is a view taken along line C in FIG. FIG. As shown in FIG. 5, the back surface 2a of the battery case 2 is provided with a prevention connector 6 incorporating a positive terminal 6a and a waterproof connector 7 incorporating a negative terminal 7a so as to be exposed to the outside. . FIG. 2 is an enlarged view of the case receiving portion 3 of FIG. 1. As shown in FIG. 2, the case receiving portion 3 includes a positive terminal 6 a, a negative terminal 7 a, a contact switch 16, and a connection switch 20 of the battery case 2. The positive power receiving terminal 11a, the negative power receiving terminal 12a, the contact plate 17, and the short-circuit terminals 21a and 21b are respectively attached to the positions. The power receiving terminals 11a and 12a and the short-circuit terminals 21a and 21b are incorporated in the waterproof connectors 11, 12, and 21, respectively.

  Further, the contact switch 16 having the above-described pair of terminals 16a and 16b is provided on the back surface 2a of the battery case 2 so as to be exposed to the outside.

  Further, a connection switch 20 having a pair of terminals 20a and 20b is provided on the back surface 2a of the battery case 2 so as to be exposed to the outside.

  The shape of the outer shell 26 of the battery case 2 is matched with the outer shell shape of the underwater vehicle 10. Thereby, when the battery case 2 is attached to the case receiving part 3, the outer shell shape of the battery case 2 is matched with the outer shell shape of the underwater vehicle 10, so that the fluid resistance is not increased by the shape of the battery case 2. You can

  On the outer shell side of the battery case 2, a seal 28 such as rubber extending along the outer periphery is attached. When the battery case 2 is attached to the case receiving portion 3 by the seal 28, the battery case 2 is also waterproofed, so that the waterproof function of the waterproof connectors 6, 7, 11 and 12 is doubled and the waterproof property is enhanced.

  FIG. 6 is an enlarged view of FIG. 5C. As shown in FIG. 6, the battery case 2 is provided with a handle 30 that is gripped when the battery case 2 is removed from the underwater vehicle body 10a. The handle 30 is housed inside the cover 31 while the underwater vehicle 10 is traveling. The cover 31 is fixed to the battery case 2 with screws or the like. When the handle 30 is used, the cover 31 can be removed by removing the screw, and the handle 30 can be pulled out from the inside. In use, the handle 30 is prevented from being released by the enlarged diameter portion 30 a being locked by the locking member 32.

  Nitrogen gas can be enclosed in the battery case 2 in advance, so that when the battery case 2 is attached to the case receiving portion 3, the operation of filling nitrogen gas becomes unnecessary, and the battery can be replaced quickly. Can do.

  In addition, this invention is not limited to embodiment mentioned above, Of course, a various change can be added in the range which does not deviate from the summary of this invention.

  For example, the relay timer may be operated without either the contact switch 16 or the connection switch 20 described above.

  In some cases, the timer function of the timer relay 22 may be omitted. Conversely, if the predetermined time from the count of the timer to the closing of the power supply switch 9 is sufficiently long without omitting the timer function, it is not necessary to follow the mounting position described above. That is, the positive terminal 6a, the negative terminal 7a, the power receiving terminals 11a and 12a, the contact switch 16, and the contact plate 17 are closed so that the contact switch 16 and the connection switch 20 are closed after the positive terminal 6a and the negative terminal 7a are waterproofed. The attachment positions of the connection switch 20 and the short-circuit terminal need not be determined.

  Although the case where the connection switch 20 is closed after the contact switch 16 is closed has been described above, the attachment positions of the terminals and the like may be determined so that the contact switch 16 is closed after the connection switch 20 is closed.

  The waterproof connectors 6, 7, 11, and 12 constitute a waterproof means, but other appropriate ones may constitute the waterproof means. Further, the contact switch 16, the contact plate 17, the connection switch 20, the short-circuit terminals 21a and 21b, the power source 23, the timer relay 21 and the power supply switch 9 constitute a short-circuit prevention means, but an appropriate combination of these or other appropriate The short prevention means may be configured with anything. At least one of the contact plate 17 and the short-circuit terminals 21a and 21b constitutes an operating part, and at least one of the contact switch 16 and the connection switch 20 constitutes an actuated part. You may comprise a to-be-actuated part. The power source 23, the timer relay 22 and the power supply switch 9 constitute a switch unit, but the switch unit may be composed of other appropriate ones. Although the timer of the timer relay 22 constitutes a timer part, the timer part may be constituted by other appropriate ones.

1 is a configuration diagram of an underwater vehicle capable of battery replacement according to an embodiment of the present invention. It is an enlarged view of the case receiving part of FIG. It is a block diagram of the short-circuit prevention function of the battery case of FIG. It is a figure explaining the example of a waterproof connector. 5A is a vertical cross-sectional view of the battery case, FIG. 5B is a BB line arrow diagram of FIG. 5A, and FIG. 5C is C diagram of FIG. 5A. FIG. FIG. 6 is an enlarged view of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Storage battery 2 Battery case 3 Case receiving part 5 Bolt hole 6a Positive electrode terminal 7a Negative electrode terminal
DESCRIPTION OF SYMBOLS 9 Power supply switch 9a Connection terminal 9b ON terminal 9c OFF terminal 10 Underwater vehicle 11a, 12a Power receiving terminal 13a Connection terminal 13b, 14b Waterproof part 14a Insertion hole 16 Contact switch 16a, 16b A pair of terminal 17 Contact board 20 Connection switch 20a, 20b A pair of terminals 21a, 21b Short-circuit terminal 22 Timer relay 23 Power supply 24, 25 Diode
26 Outer shell 28 Seal 30 Handle 30a Expanded diameter portion 31 Cover 32 Locking member

Claims (4)

An underwater vehicle to which a storage battery for power supply is replaceably attached,
A battery case with a storage battery inside,
A case receiver provided on the body of the underwater vehicle, to which the battery case is detachably attached,
The battery case has a positive electrode terminal connected to the positive electrode of the storage battery, and a negative electrode terminal connected to the negative electrode of the storage battery,
The case receiving portion, when the battery case is attached to the case receiving portion, respectively, a positive power receiving terminal connected to the positive terminal, a negative power receiving terminal connected to the negative terminal, Have
The positive terminal connected to the positive power receiving terminal and the negative terminal connected to the negative power receiving terminal are waterproof so that they can be insulated even if the periphery of the positive terminal and the negative terminal is wet. Waterproof means,
At the time of attaching the battery case to the case receiving portion, before the waterproofing, at least one of the positive electrode terminal and the positive electrode of the storage battery and the negative electrode terminal and the negative electrode of the storage battery is disconnected, and the waterproofing is performed. And a short-circuit prevention means for connecting the positive electrode terminal and the positive electrode of the storage battery and connecting the negative electrode terminal and the negative electrode of the storage battery. Running body. The short-circuit prevention means includes
An operating portion provided in the case receiving portion;
Provided in the battery case, and when the battery case is attached to the case receiving part, the actuated part actuated by the actuating part,
The actuated part is actuated to provide a connection between the positive electrode terminal and the positive electrode of the storage battery, and a switch part that allows connection between the negative electrode terminal and the negative electrode of the storage battery.
The positive electrode terminal, the negative electrode terminal, the positive and negative electrode power receiving terminals, the operating portion, the operated portion, and the mounting position of the waterproofing means were waterproofed while the battery case was attached to the case receiving portion and moved. The underwater vehicle according to claim 1, wherein the underwater vehicle is determined to be operated later. The short-circuit prevention means includes
An operating portion provided in the case receiving portion;
Provided in the battery case, and when the battery case is attached to the case receiving part, an actuated part actuated by the actuating part,
A timer unit that starts counting time by the operation of the operated unit;
A switch unit that connects the positive electrode terminal and the positive electrode of the storage battery and connects the negative electrode terminal and the negative electrode of the storage battery after a predetermined time has elapsed from the start of counting. The underwater vehicle according to claim 1, wherein The waterproof means is a waterproof connector provided with the positive terminal, the negative terminal, the positive and negative power receiving terminals,
The short-circuit prevention means includes
A contact switch provided on the battery case;
Provided in the case receiver, and when the battery case is attached to the case receiver, a first operating part that contacts the contact switch and closes the contact switch;
A connection switch having a pair of terminals provided in the battery case;
Provided in the case receiving portion, and when the battery case is attached to the case receiving portion, a second operating portion connected to the pair of terminals to short-circuit the pair of terminals and to close the connection switch;
When both the contact switch and the connection switch are closed, a switch unit is provided that connects the positive electrode terminal and the positive electrode of the storage battery and connects the negative electrode terminal and the negative electrode of the storage battery. And
The positive electrode terminal, the negative electrode terminal, the positive and negative power receiving terminals, the contact switch, the connection switch, the first and second actuating parts, and the mounting position of the waterproof means are moved by attaching the battery case to the case receiving part. The underwater vehicle according to claim 1, wherein both the contact switch and the connection switch are closed after the waterproofing.

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