DE29711556U1 - Power supply device for a motorized two-wheeler - Google Patents

Description

SYSTEM-ELEKTROTECHNIK G. KELLER GmbH 2 July 1997

D-71154 NUFRINGEN, GERMANY SET-14

Power supply device for a motorized two-wheeler Description:

The present invention relates to a power supply device for motorized two-wheelers, for example for motorcycles or scooters ■; Without intending to be limited, the invention is explained below with reference to motorcycles;

Modern motorcycles are typically equipped with a starter battery, which, due to the limited space and weight, is designed for a capacity of 10 to 14 ampere hours depending on the type and class of the motorcycle. Such a starter battery is typically housed inside the fairing and is therefore not easily accessible. The two battery poles are each connected via an electrically insulated cable to a mounting box, which is permanently attached to the tubular rod or to the fairing of the motorcycle. Such a mounting box is typically provided with a socket part in which there are at least two plug contacts that are electrically connected to the two cables. To protect against dirt, such a mounting box is also provided with a hinged hinged lid, which can be opened under

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the spring tension of a coil spring is pressed against the peripheral edge of the socket part and seals it splash-proof - Typically, such a socket part is designed with a circular and a flat peripheral section so that when a power supply device is connected, the correct polarity is automatically and automatically ensured when connecting the current-carrying connection cable;

Often, and depending on the weather conditions, motorcycles and scooters are only used for longer periods of time. Due to the very limited capacity of the starter battery, there is a risk that sufficient battery voltage will not be available. There is therefore a need for an easy-to-use and universally applicable power supply device for a motorized two-wheeler that is equipped with a starter battery and a splash-proof installation socket that is permanently mounted on the vehicle, the plug contacts of which are arranged within a socket part with a circular and a flat peripheral section and are connected to the positive and negative poles of the starter battery via an insulated cable.

,4 The object of the present invention is to provide a power supply device for a motorized two-wheeler equipped in this way;

To solve this problem, the present invention provides two different embodiments of a power supply device for a motorized two-wheeler; A first embodiment according to the invention is characterized by the following combination of features:

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A power supply device for a motorized two-wheeler, with

a first and a second, each electrically insulated cable, a plug part arranged at the head of the cable, which has:

an elongated, essentially radially symmetrical molded body, at one end of which a protruding plug socket is integrally molded, aligned coaxially with the longitudinal axis of the molded body, which has a closed peripheral wall with a circular segment and with a flat segment, - at least two metal plug pins that protrude over a plug socket base and are arranged parallel and at a distance from one another within the plug socket cavity and which are each provided in one piece with a connection terminal penetrating the plug socket base, which are arranged in a protected manner within the molded body and are electrically connected to the first or second cable, and with a terminal clamp at each other cable end, which is designed for connection to a battery pole of a conventional motor vehicle battery.

With this first embodiment of a power supply device according to the invention for a motorized two-wheeler, a jump-start procedure can be carried out easily and quickly from any motor vehicle, typically a passenger car, in order to supply the starter battery on the motorized two-wheeler with sufficient current and/or voltage so that the engine on the two-wheeler can be started. This first embodiment of a power supply device according to the invention is clearly a jump-start cable of a specific design that is attached to the head-

end of the two cables has a specifically designed plug part with a socket, which is designed for connection to the socket part on the installation box permanently mounted on the two-wheeler, and which has a terminal clamp on each of the other two cable ends, which is designed for connection to a battery terminal of a conventional vehicle battery, here in particular the battery in a car i

Advantageous embodiments and further developments of this jump start cable according to the invention for a motorized two-wheeler emerge from the subclaims.

Each cable is preferably designed as a low-voltage cable having an insulated copper conductor with a copper cross-section of

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at least 6 mm or approximately 6 mm - When jump-starting a 60 Ah car battery, currents of 10 to 30 A can easily flow and such a copper cross-section is required to avoid excessive heating and/or other damage to the cable.

Furthermore, it is useful if each cable has a length of more than 150 cm, for example a length of around 160 cm. Since the two-wheeler can easily be positioned quite close to the vehicle providing the jump start, this type of cable length has proven to be very suitable in practice.

Preferably, each terminal clamp is a fully insulated terminal clamp in accordance with DIN 72 553; this ensures an optimal safety standard.

A second embodiment of a power supply device according to the invention for a motorized two-wheeler is

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characterized by the following combination of features:

A power supply device for a motorized two-wheeler, with

an insulated strand with at least two wires, a plug part arranged at the head of the strand, which has:

- an elongated, essentially radially symmetrical molded body, at one end of which a protruding plug socket is integrally formed, aligned coaxially with the molded body's longitudinal axis, which has a closed peripheral wall with a circular segment and'-with a flat segment,

- at least two metal plug pins which protrude from a socket base and are arranged parallel and at a distance from one another within the socket cavity and which are each provided with a connection terminal penetrating the socket base, which are arranged in a protected manner within the molded body and are each electrically connected to a separate wire of the stranded wire and with

a charger that is equipped with at least a two-pin plug for connection to a conventional mains socket and that has at least two outputs, each of which is connected to a wire of the strand.

It is clear that this embodiment of the invention provides an adapted charger which has a specifically designed plug part on the head end of the wire, which enables connection to the specifically designed and fixedly mounted installation socket on the two-wheeler. Advantageous embodiments and further developments of this second embodiment arise from the subclaims.

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Preferably, a so-called universal charger of conventional, commercially available design can be used as the charger, which supplies direct current of a low, selectable voltage after the two-pin plug has been plugged into a conventional mains socket of the usual 220 volt, 50 Hz power supply network. Preferably, this charger is equipped with a voltage selector switch in order to be able to tap a voltage between 3 and 14 volts at the outputs. The maximum current is typically 300 mA. This makes it possible to adapt to the charging voltage, typically 6 V or 12 V, of the majority of starter batteries typically used for motorized two-wheelers. ^% '-

Alternatively, the charger can be a so-called continuous maintenance device that

is activated when the battery voltage falls below a lower voltage limit and begins a charging process;

during a charging process, with increasing voltage, the battery is charged with decreasing current until an upper voltage limit is reached and then the charging process is terminated; and

If the battery voltage drops again, for example if the motorized two-wheeler is not used for a long period of time, below the lower voltage limit, it is reactivated and a new charging process is carried out.

For a typically used 14-volt battery, the lower voltage limit is preferably about 13.5 volts and the upper voltage limit is about 13.9 volts.

In addition, this continuous maintenance device can be equipped with a light indicator that only lights up during

a charging process is activated and displays it.

Such a long-term maintenance device can remain connected to the battery for a very long period of time, for example over the entire winter, during which the motorized two-wheeler is typically not used, because the precise voltage control excludes excessively high battery voltage, which could cause the battery to gas.

Both the first and second embodiments of a power supply device according to the invention can be equipped with the same plug part. Preferably, the two cables or the strand are inserted into the molded body of the plug part in a splash-proof manner. This ensures the necessary safety, even if a jump start procedure has to be carried out under rough weather conditions.

According to a preferred embodiment, the plug part is made of two parts, with a molded body having the socket, the pins and the connection terminals, which is provided with an external thread section on its outer circumference. In addition, an adapted sleeve part is provided, which is provided with a splash-proof inlet section for the head ends of the cable or strand and with a threaded section on its inner circumference that can be screwed onto the external thread section on the molded body. With the help of such a two-part plug part, the cable or strand ends can be connected quickly and easily to the easily accessible connection terminals, and then after screwing on the sleeve part, these connections are protected within a closed molded body cavity.

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According to an alternative embodiment, the plug part is designed as a one-piece "injected" plug. The elongated molded body is an injection molded body, in whose hardened injection molding compound the connection terminals and the head ends of the cables or stranded wires are embedded. To produce it, these head ends of the cables or stranded wires are first electrically and mechanically permanently connected to a connection terminal. The connection terminals prepared in this way are then arranged in an injection mold for the plug, and injection molding compound is then introduced into the mold and hardened. Apart from the plug pins, all other bare and current-carrying parts are protected and insulated within the injection molding compound.

Furthermore, it is preferably provided that a circumferential, radially protruding flange is integrally formed on the plug part, for example on its sleeve part or on its injection-molded body. With the help of this flange, the plug part can easily be plugged onto the installation box that is permanently mounted on the vehicle and, after the power supply process has ended, can be removed from this installation box again without putting strain on the cable or the stranded wire and its connection to the connection terminals.

Finally, a plug part is preferably provided whose molded body has three plug pins that protrude beyond the closed socket base and are arranged within the socket cavity parallel and at a distance from one another essentially in the corners of an equilateral triangle, the base line of which runs parallel and at a distance from the flat socket peripheral segment; here, the two plug pins adjacent to the flat socket peripheral segment preferably serve to supply power.

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supply of the starter battery and the plug pin that is further away from the flat plug socket peripheral segment serves as a protective contact and can be electrically connected to the wheel rods via a ground connection. The current-carrying plug pins can have a larger diameter than the plug pin assigned to the protective contact.

The two embodiments of a power supply device according to the invention are explained in more detail below with reference to the drawings, the latter showing:

Figure la in a schematic, perspective view a mounting box for fixed installation on a motorized two-wheeler;

Figure 1b in a schematic, perspective representation a first embodiment of a plug part of a power supply device according to the invention for insertion into the installation box according to Figure la;

Figure 2a shows an exploded sectional view of a screw part and a schematic side view of a molded body of the plug part according to Figure 1b;

Figure 2b is a plan view of an expanded, slotted sleeve part on the molded body of the plug part according to Figure 2a;

Figure 2c is a front view of the two unfolded sleeve halves of the arrangement according to Figure 2b;

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Figure 3 shows a schematic sectional view of a first embodiment of the power supply device according to the invention with a pole clamp at each of the other cable ends;

Figure 4 shows a perspective, exploded view of a terminal clamp of the embodiment according to Figure 3;

Figure 5 shows a schematic sectional view of a second embodiment of the power supply device according to the invention with a charger at the other ends of the strand;

Figure 6 shows a perspective view of the charger of the embodiment according to Figure 5;

Figure 7 in a schematic perspective view a second embodiment of a plug part of a power supply device according to the invention for insertion into the installation box according to Figure la;

Figure 8 is a side view of the plug part according to Figure 7;

Figure 9 is a front view of the plug part according to Figure 7; and

Figure 10 is a schematic representation of a step along the step line X-X from Figure 9 of the plug part according to Figure 7.

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A splash-proof installation box 10 is fixed to the rods or to the fairing of the motorized two-wheeler. The installation box 10 shown in Figure 1a essentially consists of an injection-molded body 11 and a hinged lid 40 attached to it. A socket part 12, a mounting flange 24 and a cylindrical sleeve section 28 are formed on the injection-molded body 11. The socket part 12 has a stamp-shaped socket base 13 which is delimited by a circular peripheral section 14 and a flat peripheral section 15. Two current-carrying plug contacts 16 and 16' as well as a further plug contact 17 are inserted into the socket base 13, to which a protective conductor or ground contact can be connected. The socket base 13 is surrounded at a distance by a cylindrical socket shield 18, so that a ring-shaped gap 20 remains between the socket base 13 and the socket shield 18. The socket shield 18 is bevelled at its ring-shaped edge, so that a cutting edge 19 is formed there.

A U-profile 21 protruding at a right angle is formed in one piece on the socket shield 18, on the end side wall sections of which an eyelet 22, 22' is formed, which serve as a bearing for a shaft 23 to which the hinged cover 40 is hinged.

Furthermore, a mounting flange 24 is formed in one piece on this bushing part 12, which has two side arms 25, 25' protruding in opposite directions, in each of which a hole 26, 26* is recessed. Fastening means (not shown) can be inserted into these holes 26, 26', with the help of which the mounting flange 24 is attached to mounting straps (not shown), which in turn are attached to the rods of the two-wheeler or to its fairing.

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A protruding sleeve section 28 is formed on the mounting flange 24, in the outer circumference of which - adjacent to the mounting flange 24 - a circumferential groove 29 is cut out. The connection terminals are located within this sleeve section 28, wherein Figure 1a only shows the connection terminals 30, 30' to which the insulated cables 32 and 34 are crimped. These can be, for example, 65 cm long copper cables, each with a copper cross-section of 6 mm, and each provided with an eyelet 33, 35 at its other end, which is intended for connection to a battery terminal of the starter battery on the motorized two-wheeler. A sleeve 36 made of flexible plastic is pulled over the head end sections of the cables 32, 34 and has a circumferential, inwardly protruding projection 37 at one end that can snap into the groove 29 on the sleeve section 28. The other sleeve end 38 tightly surrounds the cables 32, 34 so that a splash-proof arrangement is created.

This installation box 10 also includes a hinged lid 40 - shown in Figure 1a in an open configuration - which is pivotably connected to the shaft 23. Inside this hinged lid 40 is a ring 41 made of soft plastic, which rests against the cutting edge 19 when the hinged lid 40 assumes its closed position. A coil spring 42 surrounds the shaft 23, one spring end 43 of which is fixed to the U-profile 21, and the other spring end 44 of which is held on an inner wall section of the hinged lid 40. The spring tension of this coil spring 42 tries to press the hinged lid into its closed position so that the plug contacts 16, 16', 17 are protected from dirt and water.

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A built-in socket 10 described in detail above is typically fixed to the rods or the fairing of a motorized two-wheeler and connected to the pole terminals of the starter battery of the two-wheeler via the connecting cables 32, 34. A power supply device according to the invention can be connected with its plug part 50 or 150 to such a built-in socket 10 in order to charge the starter battery on the motorized two-wheeler and/or to supply it with current/voltage during a jump start process.

A first embodiment 1 of a power supply device according to the invention for a motorized two-wheeler is shown schematically in Figure 3. This power supply device 1 includes a first cable 80 and a second cable 81. Both cables 80, 81 are designed as low-voltage cables and each have a copper conductor 83 provided with insulation 82, which has a copper

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cross-section of 6 mm. The head of the two cables 80, 81 is connected to a plug part 50 or 150. The other end of the two cables 80, 81 is connected to a terminal clamp 85 or 85'.

A second embodiment 100 of a power supply device according to the invention for a motorized two-wheeler is shown schematically in Figure 5. This power supply device 100 includes an insulated two-wire strand 105, which is connected at its head end to a plug part 50 or 150 and which is connected at its other end to a charger 110.

A first embodiment of such a plug part 50 is explained below with reference to Figures 1a, 2a, 2b and 2c.

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In any case, the plug part 50 or 150 provided according to the invention is designed and adapted to form an electrical plug connector together with the installation box 10 explained above. A first embodiment of the plug part 50 provided according to the invention for this purpose and shown in Figures 1b, 2a, 2b and 2c is designed in two parts and essentially consists of an elongated, essentially radially symmetrical molded body 51 and a screw part 71. A plug socket 52 and a sleeve part 62 are formed on the molded body 51. The plug socket 52 has a closed peripheral wall 53 with a circular segment 54 and a flat segment 55, which are connected to one another via rounded sections. This plug socket peripheral wall 53 can be introduced into the gap 20 between the socket base 13 and the socket shield 18 on the installation box 10. Furthermore, this socket peripheral wall 53 and a socket base 57 delimit a socket cavity 56, into which at least two metallic plug pins 58, 58', arranged parallel and at a distance from one another, serve to conduct current, protrude, which protrude beyond the closed socket base 57^. In addition, a further plug pin 59 can be provided, which is intended for a protective contact or ground connection. In the embodiment shown, three plug pins 58, 58' and 59 are provided, which are arranged essentially in the corners of an equilateral triangle, the base line of which runs parallel and at a distance from the flat socket peripheral segment 55.

A circumferential, radially protruding projection 60 is formed on the outer circumference of the molded body 51, approximately flush with the socket base 57, which serves as a support for a sealing ring 61.

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Furthermore, the molded body 51 has a substantially radially symmetrical sleeve part 62 which delimits a molded body cavity 65 in which the connecting terminals are accommodated. The sleeve part 62 is preferably slotted so that one sleeve part half 63 is at least partially detachable and removable, but remains integrally connected to the rest of the sleeve part 62 via a flexible web 64. After folding away the sleeve part half 63, access to the connecting terminals is easier. At least two connecting terminals 68 and 68' are provided which protrude through the socket base 57 and are integrally connected to the plug pins 58 and 58'. In addition, a further connecting terminal 69 can be present which is integrally connected to the further plug pin 59. The end sections of the copper conductors 83 of the cables 80 and 81, which have been freed from their insulation 82, can be inserted into the connection terminals 58, 58' and then crimped on. Typically, a separating plate 66 can be provided between the two connection terminals 58 and 58', which is integrally formed on the inner wall of the sleeve part 62 and the socket base 57. A protective contact conductor (not shown) can be connected to the further connection terminal 59. After the head-side end sections of the cables 80 and 81 have been connected in this way, the deflected sleeve part half 63 is returned to its original position in order to create a closed molded body cavity 65. An external thread section 70 is formed on the outer circumference of the sleeve part 62.

Furthermore, the plug part 50 includes a sleeve-shaped screw part 71, which is provided with an internal thread section 72 on its inner circumference. The screw part can be screwed onto the sleeve part 62 on the

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The molded body 51 can be screwed on and secured in place. In addition, the screw part 71 can be provided on its outer circumference with a ribbing 73 aligned parallel to the molded body's longitudinal axis, which makes it easier to screw on and unscrew the screw part 71. When screwing on the screw part 71, the sealing ring 61 is clamped between the projection 60 and the circumferential end face 74 on the screw part 71.

Furthermore, a circumferential, radially projecting flange 75 is integrally formed on the screw part 71, which facilitates plugging the plug part 50 onto the installation box 10 _or removing the plug part 50 from this installation box 10.

Adjoining the flange 75, the screw part 71 has a cylindrical end section 76, which forms a splash-proof inlet for the cable ends into the plug part 50. For this purpose, a flexible, easily pierced plastic membrane can be provided in the end section 76. Alternatively, a pierced, flexible plastic plug 77 can be provided within this end section 76, through whose hole 78 the two cables 80, 81 are guided. When the screw part 71 is screwed onto the molded body 51, this plug 77 is squeezed together and seals the cables 80, 81 against the screw part 71.

As an alternative to the two-part plug part 50 described in detail above, a power supply device according to the invention could also be equipped with a similar but one-part plug part which is provided with a socket part which ensures an electrical plug connection to a mounting box 10.

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Such a second embodiment of a plug part 150 according to the invention is shown in Figures 7 to 10. In contrast to the first embodiment explained above, this is a one-piece, "injected" plug. This one-piece plug part 150 has an elongated, essentially radially symmetrical injection-molded body 151, on the front end of which a plug socket 152 is molded. The plug socket 152 has a closed peripheral wall 153 with a circular segment 154 and a flat segment 155, which are connected to one another via rounded sections. This plug socket peripheral wall 153 can be inserted into the gap 20 between the socket base 13 and the socket shield 18 on the installation box 10. Furthermore, this socket peripheral wall 153 and a socket base 157 delimit a socket cavity 156 into which at least two metallic plug pins 158, 158', arranged parallel and spaced apart from one another, serve to conduct current and protrude beyond the closed socket base 157. In addition, a further plug pin 159 can be provided, which is intended for a protective contact or ground connection. In the embodiment shown, three plug pins 158, 158' and 159 are provided, which are arranged essentially in the corners of an equilateral triangle, the base line of which runs parallel and spaced apart from the flat socket peripheral segment 155.

Each plug pin 158, 158' is connected in one piece to a connection terminal 168 or 168', respectively, which protrude through the socket base 157. In addition, a further connection terminal can be present, which is connected in one piece to the further plug pin 159. The end sections of the copper conductors 83 of the cables 80 or 81, which have been freed from their insulation 82, are inserted into the connection terminals 158 158'.

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placed and crimped on. A protective contact conductor (not shown) can be connected to the additional connection terminal 159. The head ends of the cables 80, 81, which are thus electrically connected to the connection terminals 158, 158', and these connection terminals 158, 158' are embedded in a hardened mass 160, which forms the body of the injection-molded body 151. A circumferential, radially protruding flange 175 is integrally formed on this injection-molded body, which makes it easier to plug the plug part onto the installation box 10 or to pull the plug part off this installation box 10.

A pole clamp 85 or 85' is attached to the other end section of the first and second cable 80, 81; these pole clamps 85, 85' have a matching, preferably fully insulated structure, which is explained below with reference to Figure 4 using the pole clamp 85. This pole clamp 85 essentially consists of two shell sections 86 and 87 and a spring 88. Each shell section 86, 87 consists of a dimensionally stable, electrically non-conductive plastic, such as polyethylene, polypropylene or polyamide and has a handle 90, a clamping jaw 91 and two bearing disks 92 or 92'. In the center of the externally arranged bearing disks 92, a hole 93 is recessed into each of which a pin 94 serving as a bearing protrudes, which protrudes from the center of the other bearing disks 92'. An elongated metal plate 95 is inserted into one of the shell sections 86, which extends from the handle 90 to the clamping jaw 91. Two connection terminals 96 and 96' are integrally formed on the end section of the metal plate 95 arranged in the handle 90, into which the end section of a copper conductor 83 of the cable 80, freed from its insulation 82, is inserted. The connection terminals 96, 96' are then crimped.

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so that an electrically conductive and mechanically strong connection is ensured between cable 80 and metal plate 95. These connection terminals 96 and 96' are covered by a cover plate 97 made of insulating plastic - shown partially broken away in Figure 4 - which is held within the U-shaped handle 90 by means of a clamping piece 98. The quite strong helical spring 88 has two long spring legs 89 and 89', which are each inserted into a handle 90 of the shell sections 86 and 87; the spring force of the spring 88 tries to press the clamping jaws 91 on each shell section 86 and 87 together with great force.

Before use, the engine of the vehicle providing jump start must first be started. The user then presses the two handles 90 of a terminal clamp 85 together with one hand against the spring force of the spring 88, opening the two clamping jaws 91. The opened clamping jaws 91 are placed on the terminal of a vehicle battery providing jump start, creating an electrically conductive contact between the battery terminal and the metal plate 95. The handles 90 are then released and the spring force of the spring 88 ensures that the clamping jaws 91 are firmly clamped onto the battery terminal. This process is repeated for the other terminal clamp 85'. The plug part 50 or 150 is then plugged onto the socket part 12 of the installation box 10, which is fixed to the rods or to the casing of the motorized two-wheeler.

Figures 5 and 6 show a second embodiment of a power supply device according to the invention. This power supply device 100 essentially consists of the plug part 50 explained above.

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or 150 which is connected to a conventional charger 110 via an insulated, two-wire strand 105. This strand 105 is designed for the transport of low current and can typically have a length of about 1.5 to 2 m. The charger 110 is a so-called universal charger of conventional, commercially available design and is provided with a plug 111 for connection to the usual power supply network (220 volts, 50 hertz alternating current). Such a charger or power supply 110 is usually provided with a two-pole output 112 to which the strand 105 is connected. This output 112 provides direct current with a maximum current of 300 mA and a selectable voltage between 3 and 14 V. In addition, the charger 110 is provided with a voltage selector switch 115, with which the charging voltage appropriate for the starter battery on the two-wheeler can be selected.

To use, the correct battery charging voltage is first selected using the voltage selector switch 115 on the charger 110, typically 6 or 12 V depending on the type of starter battery on the motorized two-wheeler. The plug part 50 or 150 is then inserted into the socket part 12 of the installation socket 10 on the two-wheeler. The plug 111 on the charger 110 is then plugged into a conventional mains socket. Typically, such a charging process is not carried out for longer than 14 days in order to avoid overcharging the battery on the two-wheeler.

In an alternative embodiment, the charger explained above is replaced by a similarly constructed long-term maintenance device, which is also provided with a plug that can be plugged into a conventional mains socket. Such a long-term maintenance device is preferably provided with a light indicator, for example in the form of LEDs (light emitting diodes), which is activated in the event of a charging process (charging indicator).

Claims (1)

"*: 'PATENT ATTORNEYS : A U.::! ^si ..KERN:;BREHM & PARTNER Albert-Roßhaupter-Str. 73 · D-8000 Munich 70 · Telephone (0 89) 7 60 55 20/ 7 60 55 26 · Telecopy (0 89) 7 60 55 59 ■ Telex 5 214 950 isar d SYSTEM-ELEKTROTECHNIK G. KELLER GmbH 2 July 1997 D-71154 NDFRINGEN, GERMANY SET-14 Power supply device for a motorized two-wheeler Protection claims: 1. Power supply device (1) for a motorized two-wheeler,
with a first and a second electrically insulated cable (80 and 81), a plug part (50.; 150) arranged at the head of the cable (80, 81), which has: an elongated, essentially radially symmetrical molded body (51; 151) at one end of which a protruding plug socket (52; 152) aligned coaxially with the molded body longitudinal axis is integrally formed, which has a closed peripheral wall (53; 153) with a circular segment (54; 154) and with a flat segment (55; 155), at least two metal plug pins (58, 58'; 158, 158') which protrude beyond a socket base (57; 157) and are arranged parallel and at a distance from one another within the socket cavity (56; 156) and which are integrally formed with a respective pin passing through the socket base (57; 157) urgent connection terminal (68, 68'; 168, 168') which are arranged in a protected manner within the molded body (51; 151) and are electrically connected to the first or second cable (80, 81), and with one terminal clamp (85, 85') at each other end of the cable, which is designed for connection to a battery terminal of a conventional vehicle battery. 2i Power supply device according to claim 1, characterized in that each cable (80, 81) is ^designed as a low-voltage line having a copper conductor (83) provided with insulation (82) and having a copper cross-section of at least 6 mm. 3. Power supply device according to claim 1 or 2, characterized in that each cable (80, 81) has a length of more than 150 cm, preferably a length of about 160 cm. 4. Power supply device according to one of claims 1 to 3, characterized in that each pole clamp (85, 85') is a fully insulated pole clamp according to DIN 72 553, item 5.3, whose handles (90) and clamping jaws (91) are made of a dimensionally stable, electrically non-conductive plastic such as polyethylene, polypropylene or polyamide. 5i Power supply device (100) for a motorized two-wheeler
with one, each insulated, at least two-core strand (105), a plug part (50; 150) arranged at the head of the strand (105), which has: an elongated, essentially radially symmetrical molded body (51; 151), at one end of which a protruding plug socket (52; 152) is integrally formed, which is aligned coaxially with the molded body's longitudinal axis and has a closed peripheral wall (53; 153) with a circular segment (54; 154) and with a flat segment (55; 155), at least two metal plug pins (58, 58; 158, 158')/ which protrude beyond a socket base (57; 157) and are arranged parallel and at a distance from one another within the socket cavity (56; 156) and which are provided in one piece with a connection terminal (68, 68'; 168, 168') penetrating the socket base (57; 157), which are arranged in a protected manner within the molded body (51; 151) and are each electrically conductively connected to a separate wire of the strand (105), and with a charger (110) which is equipped with at least a two-pole plug (111) for connection to a conventional mains socket and which has at least two outputs (112) to each of which a core of the stranded wire (105) is connected. 6. Power supply device according to claim 5, characterized in that the charger (110) is equipped with a voltage selector switch (115) in order to be able to tap a voltage between 3 and 14 volts at the outputs. 7. Power supply device according to claim 5 or 6, characterized in that the charger (110) supplies direct current with a maximum current of 300 mA. 8- Power supply device according to claim 5, characterized in that the charger (110) is a so-called continuous maintenance device, which is activated when the battery voltage drops below a lower voltage limit and begins a charging process? during a charging process, when the voltage increases, the battery is charged with a decreasing current until an upper voltage limit is reached and then this charging process is terminated; and if the battery voltage drops again, for example if the motorized two-wheeler is not used for a long period of time, below the lower voltage limit, it is reactivated and a new charging process is carried out. 9. Power supply device according to claim 8 , characterized in that the lower voltage limit is approximately 13.5 volts and the upper voltage limit is approximately 13.9 volts. 10. Power supply device according to claim 8 or 9, characterized in that the long-term maintenance device is additionally equipped with a light indicator that is only activated during a charging process and indicates this. 11. Power supply device according to one of claims 1 to 10, characterized in that the two cables (80, 81) or the strand (105) are each inserted in a molded body cavity (65) on the molded body (51) of the plug part (50) in a splash-proof manner. 12. Power supply device according to one of claims 1 to 11, characterized in that the plug part (50) is designed in two parts, - with a molded body (51) having the plug socket (52), the plug pins (58, 58') and the connection terminals (68, 68'), which is provided on its outer circumference with an external thread section (70), and with a screw part (71) which is designed with an inlet section (76) for the head ends of the cables (80, 81) or the strand (105), and which is provided on its inner circumference with an internal thread section (72) which can be screwed onto the external thread section (70) on the molded body (51). 13. Power supply device according to claim 12, characterized in that a slotted sleeve part (62) is integrally formed on the molded body (51), which has an at least partially removable or swingable sleeve part half (63) in order to facilitate access to the connection terminals (68, 68'). 14. Power supply device according to claim 12 or 13, characterized in that a circumferential, radially projecting flange (75) is integrally formed on the screw part (71). 15. Power supply device according to one of claims 1 to 10, characterized in that the plug part (150) is formed in one piece and has an injection-molded body (151) on the front end of which the socket (152) is molded, in which the plug pins (158, 158', 159) are located; and this injection-molded body (151) consists of a hardened injection-molded compound (160) in which the connection terminals (168, 168') with the head ends of the cables (80, 81) or the stranded wires (105) are embedded. 16. Power supply device according to claim 15, characterized in that a circumferential, radially projecting flange (175) is integrally formed on the injection-moulded body (151). 17. Power supply device according to one of claims 1 to 16, characterized in that the plug part (50; 150) has three plug pins (58, 58', 59; 158, 158', 159) which protrude beyond the closed socket base (57; 157) and are arranged within the socket cavity (56; 156) parallel and at a distance from one another essentially in the corners of an equilateral triangle, the base line of which runs parallel and at a distance from the flat socket peripheral segment (55; 155).