Electrical connection device, battery box, and box-type battery for ships

Abstract

The present invention provides an electrical connection device, a battery box, and a box-type battery for ships. The electrical connection device is arranged on the battery box and is used to electrically connect to an external electrical connection device to realize charging and discharging of the battery box. The connection device includes: an electrical connector portion, which is used to electrically connect to the external electrical connection device; a floating mechanism, which is arranged on the battery box and is used to install the electrical connector portion. The floating mechanism drives the electrical connector portion to move within its plane and / or along the electrical connection direction to electrically connect to the external electrical connection device. When the electrical connection device on the battery box and the external electrical connection device are docked, the electrical connector portion is compressed and floats under the action of the floating mechanism, so that the electrical connector portion can move within its plane and / or move along the electrical connection direction for alignment, thereby enabling the electrical connection device on the battery box and the external electrical connection device to align with each other, facilitating docking between the two and improving docking efficiency and stability.

Description

Technical Field

[0001] The present invention relates to the field of ship battery replacement, and in particular to an electrical connection device, a battery box, and a box-type battery for ships. Background Art

[0002] To promote the oil-to-electricity strategy, new energy technologies are rapidly becoming popular, and electric-powered ships are gradually entering the public eye. However, inland ports lack the infrastructure to build charging stations, and ships are large and consume a lot of power, so charging ship batteries takes a considerable amount of time. Therefore, battery swapping has become the main technical approach. Charging stations are built about 3 kilometers from the port, and short-distance delivery vehicles are used. When the battery is exhausted, the original battery is removed and replaced with a new one to achieve longer driving time. However, existing swappable battery solutions have the following shortcomings:

[0003] When the battery is docked with the interface on the ship, due to the deviation in the placement of the power-consuming end and the power-supply end, it is difficult to completely align the electrical connector of the power-consuming end with the electrical connector of the power-supply end at the beginning, which can easily cause docking failure and reduce docking efficiency and stability.

[0004] Furthermore, to enable quick battery swaps, the battery box is typically locked on the ship's deck, leaving it exposed to the open air. This makes the battery box susceptible to external influences, such as the ship's swaying in the water and water flow that can easily wash into the ship or onto the battery box. These factors pose significant challenges to the stability and safety of the electrical connections during battery swaps on board ships. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the defects of the prior art such as easy docking failure and low docking efficiency, and to provide an electrical connection device, a battery box and a box-type battery for ships.

[0006] The present invention solves the above technical problems through the following technical solutions:

[0007] An electrical connection device is provided on a battery box and is used to electrically connect to an external electrical connection device to realize charging and discharging of the battery box, the connection device comprising:

[0008] an electrical connector portion, the electrical connector portion being used to establish an electrical connection with the external electrical connection device;

[0009] A floating mechanism is provided on the battery box and is used to install the electrical connector. The floating mechanism drives the electrical connector to move within its plane and / or along the electrical connection direction to electrically connect with the external electrical connection device.

[0010] When the electrical connection device on the battery box is docked with the external electrical connection device, the electrical connector is compressed and floats under the action of the floating mechanism, so that the electrical connector can move within its plane and / or move along the electrical connection direction for alignment, thereby enabling the electrical connection device on the battery box and the external electrical connection device to be aligned with each other, facilitating the docking of the two and improving the docking success rate.

[0011] Preferably, the floating mechanism includes:

[0012] a connecting seat, to which the electrical connector is fixedly connected;

[0013] A rotating mechanism, wherein the rotating mechanism rotates the connecting base to connect to the battery box;

[0014] A limiting mechanism is movably connected to the connecting seat and is used to limit the rotation range of the connecting seat.

[0015] The rotation mechanism is used to achieve relative rotation between the connecting base and the battery box; the limiter is used to limit the rotation range of the connecting base to avoid damage to the electrical connection head caused by excessive rotation of the connecting base, thereby improving the service life of the electrical connection device.

[0016] Preferably, the rotation angle allowed by the limiting mechanism is smaller than the rotation angle allowed by the rotating mechanism.

[0017] By cooperating with the limiting mechanism and the rotating mechanism, reliable and stable floating within a certain rotation angle range is achieved.

[0018] Preferably, the limiting mechanism includes a plurality of limiting columns, and the plurality of limiting columns are arranged around the rotating mechanism with the rotating mechanism as the center.

[0019] The symmetrical arrangement makes the electrical connection device simple in structure, evenly stressed, and stable in operation.

[0020] Preferably, the rotating mechanism is composed of a spherical protrusion and a spherical groove.

[0021] Through the cooperation of the spherical protrusion and the spherical groove, the connecting seat can swing in any direction and rotate relative to the battery box, which has higher flexibility and freedom; and the structure is reliable and easy to manufacture and install.

[0022] Preferably, the floating mechanism further comprises a support plate, and the floating mechanism is fixed to the battery box via the support plate;

[0023] The support plate has a spherical protrusion on its end surface facing the connecting seat, and the connecting seat has a spherical groove adapted to the spherical protrusion, and the spherical protrusion and the spherical groove cooperate to realize the rotational connection of the connecting seat relative to the support plate;

[0024] Alternatively, the support plate has a spherical groove on its end surface facing the connecting seat, and the connecting seat has a spherical protrusion adapted to the spherical groove, and the spherical protrusion cooperates with the spherical groove to realize the rotational connection of the connecting seat relative to the support plate;

[0025] Alternatively, the support plate and the connecting seat have spherical grooves on their respective opposing surfaces, and the connecting seat is rotatably connected to the support plate by a rotating member arranged in any of the spherical grooves.

[0026] The rotational connection between the connecting seat and the supporting plate is achieved by the mutual cooperation of the spherical protrusion and the spherical groove.

[0027] Preferably, the spherical protrusion and the spherical groove are arranged at a certain distance.

[0028] The spherical protrusion and the spherical groove can be displaced to a certain extent along the electrical connection direction, thereby leaving a movable margin for the connecting seat along the electrical connection direction, avoiding rigid collision between the two and causing damage to the electrical connection parts of the two. The existence of this gap also allows tiny position errors and further improves the freedom of the connecting seat.

[0029] Preferably, the electrical connector further comprises a rotating support, the rotating support being fixed to the side of the connecting seat facing the support plate and / or the side of the support plate facing the connecting seat, and the spherical groove is provided on the rotating support.

[0030] Thus, the spherical groove and the supporting plate or the connecting seat are fixed by rotating the support.

[0031] Preferably, the limiting mechanism includes a plurality of limiting columns, and both ends or any one end of the plurality of limiting columns are movably connected to the support plate and the connecting seat.

[0032] Thus, the limiting column can guide and limit the connecting seat along the electrical connection direction.

[0033] Preferably, one end of the limiting column is fixedly connected to the support plate, the connecting seat is provided with a limiting hole which is clearance-matched with the limiting column, and one end of the limiting column extending out of the connecting seat is provided with a limiting plate.

[0034] The gap between the connecting base and the limiting column reserves space for the connecting base to move along its plane direction, thereby enabling the electrical connection portion placed on the connecting base to be displaced along its plane direction.

[0035] Preferably, the electrical connector further comprises a reset member, which is provided between the connecting seat and the support plate, and is used for providing a force to move the connecting seat away from the support plate.

[0036] The reset member can reset the connection seat from a floating state to an initial state to facilitate the next connection of the electrical connection device.

[0037] Preferably, the reset member is a spring sleeved on the limiting column, and the reset of the connecting seat is achieved by the elastic force of the spring.

[0038] Preferably, one end of the limiting column is fixedly connected to the support plate via a mounting seat, and the mounting seat has a fixing portion fixedly connected to the support plate and a limiting convex ring sleeved on the periphery of the reset member.

[0039] The connection between the limiting column and the support plate is achieved through the fixing portion, and the limiting convex ring is used to achieve the limiting fixation of the reset member and the retraction limiting of the connecting seat.

[0040] Preferably, an elastic member is provided between the limiting plate and the connecting seat.

[0041] On the one hand, the elastic member can retract when the connecting seat rotates to release the rotation space, and on the other hand, it can serve as a buffer between the limit plate and the connecting seat to prevent the connecting seat and the limit plate from touching each other and causing noise and vibration.

[0042] Preferably, the electrical connector and the floating mechanism are located inside the battery case. The floating mechanism further includes a support plate, through which the floating mechanism is secured to the battery case. The support plate, which faces the electrical connector, is fixedly connected to the inner wall of the battery case opening via a first sealing member. This ensures that the electrical connector is generally located inside the battery case, rather than protruding from it, which improves protection for the electrical connector.

[0043] Preferably, the support plate has a through hole for passing the cable of the electrical connection portion, and a second sealing member is provided in the through hole, which is tightly sleeved on the cable to achieve a seal between the cable and the through hole. Thus, the second sealing member achieves a seal between the cable and the through hole.

[0044] Preferably, the floating mechanism further comprises a positioning structure, and the positioning structure is used to achieve guiding alignment when the electrical connector portion is docked with the external electrical connection device.

[0045] The positioning structure is used for guiding during docking to improve docking efficiency and docking success rate.

[0046] Preferably, the positioning structure includes a positioning hole provided on the connecting seat, the opening of the positioning hole is located on the side of the connecting seat facing the electrical connector, and the positioning hole is used to achieve guiding alignment when cooperating with a positioning pin of an external electrical connection device.

[0047] The positioning hole can be used for inserting an external positioning pin to achieve guiding alignment during docking.

[0048] Preferably, the electrical connector portion includes two electrical connector components, and the two electrical connector components are symmetrically arranged along the rotation center of the connecting seat.

[0049] Using two electrical connector assemblies can share the working current and avoid overheating; arranging the two electrical connector assemblies in a symmetrical middle arrangement can improve the docking accuracy.

[0050] The present invention further provides a battery box comprising the electrical connection device described above. The battery box using the electrical connection device has a higher docking success rate and docking efficiency.

[0051] The present invention also provides a box-type battery for ships, comprising the battery box as described above. The box-type battery for ships using the battery box has a higher docking success rate and docking efficiency.

[0052] The positive progress effect of the present invention is:

[0053] When the electrical connection device on the battery box is docked with the external electrical connection device, the electrical connector is compressed and floats under the action of the floating mechanism, so that the electrical connector can move within its plane and / or move along the electrical connection direction for alignment, thereby enabling the electrical connection device on the battery box and the external electrical connection device to be aligned with each other, facilitating the docking of the two and improving the docking success rate, efficiency and stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 is a three-dimensional diagram of the electrical connection device of the present invention;

[0055] Figure 2 is a top view of the electrical connection device of the present invention;

[0056] Figure 3 for Figure 2 AA section view in the figure;

[0057] Figure 4 for Figure 2 BB surface cross-sectional view in;

[0058] Figure 5 It is a rear view of the electrical connection device of the present invention;

[0059] Description of reference numerals:

[0060] Electrical connector 100

[0061] Floating mechanism 200

[0062] Connecting seat 210

[0063] Limiting hole 211

[0064] Rotating mechanism 220

[0065] Limiting mechanism 230

[0066] Spherical groove 240

[0067] Rotating support 241

[0068] Spherical protrusion 250

[0069] Support plate 260

[0070] Through hole 261

[0071] Second sealing member 262

[0072] Rotating member 270

[0073] Limiting mechanism 300

[0074] Limit column 310

[0075] Limiting plate 311

[0076] Mounting Block 312

[0077] Fixing portion 313

[0078] Limiting convex ring 314

[0079] Reset 320

[0080] Elastic member 330

[0081] First sealing member 400

[0082] Positioning hole 500 DETAILED DESCRIPTION

[0083] A preferred embodiment is given below and the present invention is described more clearly and completely in conjunction with the accompanying drawings.

[0084] Combine Figure 1 and Figure 2 An electrical connection device is provided on a battery box and is used to electrically connect to an external electrical connection device on a ship to realize charging and discharging of the battery box. The electrical connection device includes:

[0085] An electrical connector 100, which is used to electrically connect to an external electrical connection device on a ship to transmit electrical energy to the ship;

[0086] The floating mechanism 200 is arranged on the battery box and is used to install the electrical connector 100, so that the electrical connector head can move within its plane and / or along the electrical connection direction driven by the floating mechanism 200 to electrically connect with an external electrical connection device. The plane referred to here is a plane perpendicular to the electrical connection direction.

[0087] When the electrical connection device on the battery box is docked with the external electrical connection device on the ship, the electrical connector part 100 is pressurized and floats under the action of the floating mechanism 200, so that the electrical connector part 100 can move within its plane and / or move along the electrical connection direction for alignment, thereby enabling the electrical connection device on the battery box and the external electrical connection device to be aligned with each other, facilitating the docking of the two and improving the docking success rate.

[0088] Combine Figure 1 and Figure 3 In this embodiment, the floating mechanism 200 includes a connecting seat 210 , a rotating mechanism 220 and a limiting mechanism 300 .

[0089] The connecting base 210 is a rectangular plate, and the electrical connector 100 is fixedly connected to the middle portion of the connecting base 210 .

[0090] The rotating mechanism 220 rotatably connects the connecting base 210 to the battery box, so that the connecting base 210 can rotate relative to the battery box.

[0091] The limiting mechanism 300 is movably connected to the connecting base 210 , and the rotation angle allowed by the limiting mechanism 300 is smaller than the rotation angle allowed by the rotating mechanism 220 .

[0092] With the above structure, the connector 210 can rotate within a predetermined range while maintaining the connection. If the predetermined range is exceeded, the limiting mechanism 300 can limit the rotation of the connector 210. This limits the rotation range of the connector 210, allowing the connector 210 to float stably and reliably within a certain rotation angle range. In addition, it prevents excessive rotation of the connector 210, which may cause damage to the cable, thereby improving reliability and service life.

[0093] In this embodiment, the rotating mechanism 220 is composed of a spherical protrusion 250 and a spherical groove 240. Through the cooperation of the spherical protrusion 250 and the spherical groove 240, the connecting seat 210 can swing in any direction within a certain angle range relative to the battery box and rotate relative to the battery box. It has a good degree of freedom, so that the connecting seat 210 can be smoothly adjusted to an appropriate connection posture to achieve docking with an external electrical connection device, and the structure is reliable and easy to manufacture and install.

[0094] In this embodiment, the floating mechanism 200 also includes a support plate 260, and the floating mechanism 200 is fixed to the battery box through the support plate 260. The support plate 260 has a spherical protrusion 250 on the end face facing the connecting seat 210, and the connecting seat 210 has a spherical groove 240 that is compatible with the spherical protrusion 250. After the spherical protrusion 250 and the spherical groove 240 cooperate, the connecting seat 210 can be rotated relative to the support plate.

[0095] Of course, in other alternatives, the spherical groove 240 can also be provided on the end surface of the support plate 260 facing the connecting seat 210, and the spherical protrusion 250 can be provided on the connecting seat 210 and adapted to the spherical groove 240. The spherical protrusion 250 and the spherical groove 240 cooperate to realize the rotational connection of the connecting seat 210 relative to the support plate.

[0096] Because spherical surface machining requires very high precision, it is preferred that, in the present invention, the support plate 260 and the connecting seat 210 have spherical grooves 240 on their respective opposing surfaces, and the connecting seat 210 is rotatably connected relative to the support plate 260 via a rotating member 270 disposed within the spherical grooves 240. The rotating member 270 can be a spherical bearing ball, or it can include a rotating body and a plurality of rollers embedded in the rotating body. In this case, the contact surface between the rotating member 270 and the spherical grooves 240 constitutes the spherical protrusion 250. This solution has the advantages of lower cost and higher yield rate compared to directly using spherical components.

[0097] Specifically, the depth of the spherical groove 240 provided on the end surface of the connecting base 210 is less than the depth of the spherical groove 240 provided on the support plate 260. This design increases the distance between the connecting base 210 and the support plate 260, leaving more room for the connecting base 210 to move, allowing the connecting base 210 to swing at a wider angle. The greater depth of the spherical groove 240 on the support plate 260 can better accommodate the rotating member 270, preventing it from falling out.

[0098] In this embodiment, the spherical protrusion 250 and the spherical groove 240 are spaced a certain distance apart, with the spacing being 1 mm to 2 mm. This allows the spherical protrusion 250 and the spherical groove 240 to move in the electrical connection direction, thereby leaving a margin of movement for the connector 210 in the electrical connection direction and preventing damage to the electrical connector 100 caused by rigid collision between the two. The presence of this gap also allows for slight positional errors and further provides the connector 210 with an additional degree of freedom in the electrical connection direction, enabling the electrical connector 100 placed on the connector 210 to better rotate into a position that matches the external electrical connection device, further improving the docking success rate.

[0099] In this embodiment, the electrical connector further includes a rotating support 241, which is fixed to the side of the connecting base 210 facing the support plate 260 and / or the side of the support plate 260 facing the connecting base 210. The spherical groove 240 is integrally formed on the rotating support 241. The rotating support 241 has lugs extending to both sides and is bolted to the support plate 260 and / or the connecting base 210 via the lugs. Thus, the spherical groove 240 is fixed to the support plate 260 or the connecting base 210 via the rotating support 241.

[0100] Combine Figure 1 、 Figure 2 and Figure 4 In this embodiment, the limiting mechanism 300 includes four limiting columns 310, which are arranged around the rotating mechanism 220 with the rotating mechanism 220 as the center. Through the symmetrical arrangement, the rotation angle of the rotating mechanism 220 in various directions can be kept basically consistent, and the working stability is higher.

[0101] One end of the limiting column 310 is connected to the support plate 260, and the other end is movably connected to the four corners of the connecting base 210. In this way, the connecting base 210 can be guided and limited along the electrical connection direction without affecting the swing of the connecting base 210.

[0102] Of course, the present invention is not limited to the above solution. In other alternative solutions, one end of the limiting post 310 may be fixedly connected to the connecting base 210, and the other end may be movably connected to the support plate 260. Alternatively, both ends of the limiting post 310 may be movably connected to both the support plate 260 and the connecting base 210, and a retaining member disposed on the limiting post 310 and located between the support plate 260 and the connecting base 210 prevents the limiting post 310 from moving out of the support plate 260 or the connecting base 210.

[0103] In this embodiment, the movable connection between the limiting post 310 and the connecting base 210 is achieved in the following manner: the connecting base 210 is provided with a limiting hole 211 that is clearance-matched with the limiting post 310, and the limiting hole 211 limits the movement of the limiting post 310, constituting the first level of limitation on the connecting base 210; the end of the limiting post 310 extending out of the connecting base 210 is provided with a limiting plate 311. This enables the limiting post 310 to move relative to the connecting base 210 in the direction of electrical connection. At the same time, the gap between the connecting base 210 and the limiting post 310 also leaves space for the connecting base 210 to move along its planar direction, so that the electrical connection portion placed on the connecting base 210 can be displaced along its planar direction. The limiting plate 311 can limit the limiting post 310 to prevent it from moving out of the limiting plate 311.

[0104] In this embodiment, the electrical connector further includes a reset member 320, which is disposed between the connection base 210 and the support plate 260. The reset member 320 is configured to provide a force to pull the connection base 210 away from the support plate 260. The reset member 320 can reset the connection base 210 from a floating state to an initial state to ensure the next connection of the electrical connection device.

[0105] In the present invention, the reset member 320 is a spring sleeved on the limiting column 310, and the elastic force of the spring is used to reset the connecting seat 210. Of course, the reset member 320 is not limited to using a spring, and a damping rod or elastic rope or other devices can also be used to achieve the reset action.

[0106] In this embodiment, the limiting post 310 is fixedly connected to the support plate 260 via a mounting seat 312. The mounting seat 312 includes a fixing portion 313 and a limiting protrusion 314. The fixing portion 313 is disc-shaped and extends radially outward. Bolts are arranged along the circumference to achieve a fixed connection to the support plate 260. The limiting protrusion 314 is cylindrical and is sleeved around the outer periphery of the reset member 320. One end of the limiting protrusion 314 is fixed to the mounting seat 312, and the other end is spaced apart from the connecting seat 210.

[0107] The limiting collar 314 counteracts the swinging motion of the connector 210 when it exceeds a predetermined range, thereby providing a second level of positional restraint for the connector 210. This dual restraint mechanism further enhances the reliability of the structure and improves the operational stability of the electrical connector. The limiting collar 314 also houses the reset element 320, ensuring it remains in a relatively closed environment, protecting it from moisture and extending its service life.

[0108] In this embodiment, an elastic member 330, which may be a rubber pad or a spring, is disposed between the limiting plate 311 and the connecting base 210. The elastic member 330 retracts when the connecting base 210 swings in the connection direction, freeing up rotational space. Furthermore, the elastic member 330 acts as a buffer between the limiting plate 311 and the connecting base 210, preventing the connecting base 210 and the limiting plate 311 from contacting and causing noise and vibration.

[0109] Combine Figure 1 and Figure 5 In this embodiment, the electrical connector 100 and floating mechanism 200 are located inside the battery case. An opening (not shown) corresponding to the electrical connector 100 is provided on the battery case panel. The floating mechanism 200 is secured to the battery case via a support plate 260. The side of the support plate 260 facing the electrical connector 100 is secured to the inner wall of the battery case opening via a first sealing member 400. The sealing member in this invention is a rubber gasket that prevents water from seeping into the battery case through the gap between the support plate 260 and the battery case panel.

[0110] The above design allows the electrical connector to be generally recessed within the battery case, rather than protruding from the outside, which helps protect the electrical connector. It also facilitates the installation of a waterproof sliding door on the battery case to enclose the electrical connector, making the structure more reasonable.

[0111] In this embodiment, the support plate 260 has a through hole 261 for passing a cable connected to the electrical connection portion. A second sealing member 262 is provided in the through hole 261. The second sealing member 262 is a rubber ring that is tightly wrapped around the cable to achieve a seal between the cable and the through hole 261, thereby preventing water from seeping into the battery box through the wiring hole.

[0112] In this embodiment, the floating mechanism 200 further includes a positioning structure for guiding alignment when the electrical connector 100 is mated with an external electrical connection device. This positioning structure includes a positioning hole 500 provided on the connector base 210. The opening of the positioning hole 500 is located on the side of the connector base 210 facing the electrical connector 100. The positioning hole 500 is used to guide alignment when mated with a positioning pin of the external electrical connection device.

[0113] In this embodiment, the electrical connector portion 100 includes two electrical connector assemblies, which are symmetrically arranged along the rotation center of the connecting seat 210; the use of two electrical connector assemblies can share the working current and avoid overheating; arranging the two electrical connector assemblies in a middle symmetrical arrangement can improve the docking accuracy and make the layout more reasonable.

[0114] The present invention further provides a battery box comprising the electrical connection device described above. The battery box using the electrical connection device has a higher docking success rate, efficiency and stability.

[0115] The present invention also provides a box-type battery for ships, comprising the battery box as described above. The box-type battery for ships using the battery box has a higher docking success rate, efficiency, and stability.

[0116] Although specific embodiments of the present invention have been described above, those skilled in the art will appreciate that these are merely illustrative and that the scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, and such changes and modifications are intended to fall within the scope of the present invention.

Claims

1. An electrical connection device, provided on a battery box, for electrically connecting to an external electrical connection device to realize charging and discharging of the battery box, characterized in that: The electrical connection device comprises: an electrical connector portion, the electrical connector portion being used to establish an electrical connection with the external electrical connection device; a floating mechanism, the floating mechanism being provided on the battery box and being used to mount the electrical connector, and driving the electrical connector to move within its plane and / or along an electrical connection direction to establish an electrical connection with the external electrical connection device; The floating mechanism comprises: a connecting seat, to which the electrical connector is fixedly connected; A rotating mechanism, wherein the rotating mechanism rotates the connecting base to connect to the battery box; a limiting mechanism, the limiting mechanism being movably connected to the connecting seat and being used to limit the rotation range of the connecting seat; The rotation angle allowed by the limiting mechanism is smaller than the rotation angle allowed by the rotating mechanism; The limiting mechanism includes a plurality of limiting columns, and the plurality of limiting columns are arranged around the rotating mechanism with the rotating mechanism as the center.

2. The electrical connection device according to claim 1, wherein: The rotating mechanism is composed of a spherical protrusion and a spherical groove.

3. The electrical connection device according to claim 2, wherein: The floating mechanism further includes a support plate, and the floating mechanism is fixed to the battery box via the support plate; The support plate has a spherical protrusion on its end surface facing the connecting seat, and the connecting seat has a spherical groove adapted to the spherical protrusion, and the spherical protrusion and the spherical groove cooperate to realize the rotational connection of the connecting seat relative to the support plate; Alternatively, the support plate has a spherical groove on its end surface facing the connecting seat, and the connecting seat has a spherical protrusion adapted to the spherical groove, and the spherical protrusion cooperates with the spherical groove to realize the rotational connection of the connecting seat relative to the support plate; Alternatively, the support plate and the connecting seat have spherical grooves on their respective opposing surfaces, and the connecting seat is rotatably connected to the support plate by a rotating member arranged in any of the spherical grooves.

4. The electrical connection device according to claim 2, wherein: The spherical protrusion and the spherical groove are arranged at a certain distance.

5. The electrical connection device according to claim 3, wherein: The electrical connection device further comprises a rotating support fixed to the side of the connection base facing the support plate and / or the side of the support plate facing the connection base, and the spherical groove is provided on the rotating support.

6. The electrical connection device according to claim 1, wherein: The limiting mechanism includes a plurality of limiting columns, and both ends or any one end of the plurality of limiting columns are movably connected to the support plate and the connecting seat.

7. The electrical connection device according to claim 6, wherein: One end of the limiting column is fixedly connected to the support plate, the connecting seat is provided with a limiting hole which is clearance-matched with the limiting column, and one end of the limiting column extending out of the connecting seat is provided with a limiting plate.

8. The electrical connection device according to claim 7, wherein: The electrical connection device further includes a reset member, which is disposed between the connection seat and the support plate and is used to provide a force to move the connection seat away from the support plate.

9. The electrical connection device according to claim 8, wherein: The reset component is a spring sleeved on the limiting column.

10. The electrical connection device according to claim 9, wherein: One end of the limiting column is fixedly connected to the support plate through a mounting seat, and the mounting seat has a fixing portion fixedly connected to the support plate and a limiting convex ring sleeved on the periphery of the reset member.

11. The electrical connection device according to claim 7, wherein: An elastic member is provided between the limiting plate and the connecting seat.

12. The electrical connection device according to claim 1, wherein: The electrical connector and the floating mechanism are located inside the battery box; the floating mechanism also includes a support plate, and the floating mechanism is fixed to the battery box through the support plate. The support plate is fixedly connected to the inner wall of the opening of the battery box around one side facing the electrical connector through a first sealing member.

13. The electrical connection device according to claim 12, wherein: The support plate has a through hole for passing the cable of the electrical connection device. A second sealing member is provided in the through hole and is tightly sleeved on the cable to achieve sealing between the cable and the through hole.

14. The electrical connection device according to claim 1, wherein: The floating mechanism further comprises a positioning structure, and the positioning structure is used to achieve guiding alignment when the electrical connector portion is docked with an external electrical connection device.

15. The electrical connection device according to claim 14, wherein: The positioning structure includes a positioning hole provided on the connection seat, the opening of the positioning hole is located on the side of the connection seat facing the electrical connector, and the positioning hole is used to achieve guiding alignment when cooperating with a positioning pin of an external electrical connection device.

16. The electrical connection device according to claim 1, wherein: The electrical connector portion includes two electrical connector components, and the two electrical connector components are symmetrically arranged along the rotation center of the connecting seat.

17. A battery box, characterized in that: The battery box comprises the electrical connection device according to any one of claims 1 to 16.

18. A box-type battery for ships, characterized in that: The box-type battery for ships comprises the electrical connection device according to any one of claims 1 to 16 or the battery box according to claim 17.

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