Power battery MSD socket

Abstract

The utility model relates to the technical field of emergency protection devices of power supplies, in particular to a power battery MSD socket. According to the brand-new power battery MSD socket provided by the utility model, an adaptive MSD plug can be inserted into the plugging port of the power battery MSD socket to be mutually plugged with a conductive part, the connection and disconnection of a voltage power supply circuit can be realized by plugging and unplugging the MSD plug, and the power battery MSD socket is also provided with a fixed connection structure, so that the power battery MSD socket can be fixed at a required position of a vehicle body; when the arrangement position is determined, a power supply cable only needs to be led to the position and penetrates through the threading opening to be connected with the conductive component, the influence of the position of the battery box body or the high-voltage distribution box is avoided, meanwhile, the size of the device is small, and the limitation of the arrangement position is small.

Description

Technical Field

[0001] The utility model relates to the technical field of emergency protection devices for power sources, in particular to a power battery MSD socket. Background Art

[0002] In pure electric vehicles, manual maintenance switches (MSDs) are widely used and are mainly installed on high-voltage distribution boxes and battery packs. When the vehicle needs maintenance, the plug of the manual maintenance switch is unplugged from the socket to disconnect the power supply of the vehicle, thereby achieving safe maintenance. Compared with passenger vehicles, commercial vehicles are not only larger in size, but also have higher batteries and high-voltage boxes. In addition, there are more battery packs and higher battery power. Battery packs and high-voltage distribution boxes are often placed on the top of the vehicle, which results in the manual maintenance switch being located higher, making it inconvenient for personnel to operate.

[0003] The Chinese utility model patent with the authorization announcement number CN205971242U discloses a single-system power battery manual maintenance switch device, which includes a box body and a box cover for sealing the bottom opening of the box body, an MSD is fixedly installed on the top plate of the box body, and a total positive input connector and a total positive output connector are respectively installed on the left and right side plates of the box body, and a first connector for connecting the MSD and the total positive input connector and a second connector for connecting the MSD and the total positive output connector are provided in the box body. The device adopts a modular design and is independent of the battery box and the high-voltage distribution box. The MSD can be arranged at any pluggable position of the vehicle, which is not affected by the position of the battery box and the high-voltage distribution box, and solves the problems mentioned above. However, this device needs to be equipped with a box body and the total positive input connector and the total positive output connector need to be installed on both sides of the box body, which is equivalent to configuring a power connection box separately, resulting in a larger volume of the entire device. Although the MSD arrangement position is not affected by the position of the battery box and the high-voltage distribution box, it will be limited by the volume of the device. Utility Model Content

[0004] The utility model aims to provide a power battery MSD socket, so as to solve the problem that the existing MSD socket needs to be separately configured with a power connection box when arranged at other positions outside the battery box or the high-voltage distribution box, which occupies a large space.

[0005] The power battery MSD socket of the utility model comprises a socket housing, the socket housing comprises a threading port and a plug interface, an insulator is fixedly installed in the inner cavity of the socket housing, a pair of conductive components are fixedly arranged in the insulator, the conductive components have a plug end corresponding to the plug interface and a wiring terminal close to the threading port, the threading port is used for the power cable to pass through and connect with the conductive component, the plug interface is used for plugging with an MSD plug, and the socket housing is also provided with a fixed connection structure for fixing it on the installation panel

[0006] Furthermore, the socket housing comprises a first housing portion and a second housing portion, the extension directions of the first housing portion and the second housing portion are perpendicular to each other and the inner cavities are connected, the second housing portion is located at the end of the first housing portion and the two as a whole form an L-shaped bent housing, the insulator is fixedly installed in the inner cavity of the first housing portion, the end opening of the first housing portion constitutes the threading port, the end opening of the second housing portion constitutes the plug-in port, and the fixed connection structure is provided on the side of the first housing portion facing away from the second housing portion.

[0007] Furthermore, the conductive component is a conductive bar, the width direction of the conductive bar extends along the direction of the plug interface, and the two side surfaces of the conductive bar are contact surfaces for plugging and contacting with the plug contacts of the MSD plug.

[0008] Furthermore, the insulator includes a pair of insulating parts, and the two conductive parts of the pair are respectively installed in the two insulating parts. The insulating part is a rectangular cylindrical structure with an opening at one end. The conductive part is fixedly inserted in the inner cavity of the insulating part from the opening. The other end of the insulating part is sealed and a plug-in avoidance port is opened on a side surface close to the sealed end. The plug-in avoidance port is arranged opposite to the plug interface for the plug contact of the MSD plug to be inserted.

[0009] Furthermore, at least one side edge of the conductive bar in the width direction is provided with a positioning recess for positioning and cooperating with the insulating component, so as to achieve relative fixation between the conductive bar and the insulating component in the length direction.

[0010] Furthermore, a shielding component is provided on the outside of the insulating component to shield the conductive component therein, and the shielding component has a wiring shielding portion for connecting with the shielding layer of the power cable and a plug-in shielding portion for connecting with the shielding structure of the adapted MSD socket.

[0011] Furthermore, the shielding component is a shielding shell wrapped around the outer side of the insulating component, and the shielding shell is provided with a front spring claw at the plug-in avoidance opening for elastically contacting the shielding structure of the MSD socket, and the front spring claw constitutes the plug-in shielding part.

[0012] Furthermore, a wire sealing structure is provided at the wire threading port, and the wire sealing structure includes an outer crimping ring and an inner crimping sleeve, and the outer crimping ring and the inner crimping sleeve are used to cooperate inside and outside to be crimped together with the shielding layer of the power cable, and the shielding shell is provided with a rear spring claw for elastically contacting the outer crimping sleeve, and the rear spring claw constitutes a wiring shielding part.

[0013] Furthermore, a protective structure is provided at the plug interface to prevent human hands from accidentally touching the conductive parts.

[0014] Furthermore, the protective structure includes a shielding frame fixedly installed in the inner cavity of the second shell component, the shielding frame is adapted to the shape of the plug-in interface, and the frame hole thereon is used for the contact piece adapted to the MSD plug to pass through so as to engage with the conductive component, and the shielding frame and the insulating component are engaged with each other to achieve anti-slip fixation of the insulating component in the inner cavity of the first shell component.

[0015] The utility model provides a new power battery MSD socket, whose plug interface can be inserted into an adapted MSD plug and plugged into a conductive component. The voltage power supply circuit can be turned on and off by plugging and unplugging the MSD plug. The power battery MSD socket is also provided with a fixed connection structure, which can be fixed at a required position of the vehicle body. When the layout position is determined, it is only necessary to lead the power cable to the position and insert it through the threading port to connect with the conductive component. It is not affected by the position of the battery box or the high-voltage distribution box, and the volume itself is small, and the layout position is less restricted. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of an embodiment of a power battery MSD socket of the utility model and an adapted MSD plug in the plugged state;

[0017] Figure 2 for Figure 1 Schematic diagram of the structure of the power battery MSD socket (handle hidden);

[0018] Figure 3 A schematic diagram showing the power battery MSD socket of the utility model when applied to a vehicle;

[0019] Figure 4 A circuit schematic diagram showing a power battery MSD including the power battery MSD socket of the utility model in a power supply system;

[0020] Figure 5 This is a three-dimensional exploded view of an embodiment of a power battery MSD socket of the utility model;

[0021] Figure 6 To display Figure 5 A schematic diagram of the cooperation between the middle shielding component and the inner shielding ring and the outer shielding sleeve;

[0022] Figure 7 A schematic diagram showing the structure in which a conductive component is installed inside an insulating component;

[0023] Figure 8 This is a schematic diagram of the matching structure of the shielding frame and the insulating components.

[0024] In the figure: 1. MSD adapter plug; 2. MSD power battery socket; 4. Vehicle; 40. Power system; 41. Power cable; 42. Controller; 43. MSD power battery; 201. Handle; 2011. Locking slide; 202. Socket housing; 2021. Fixed bottom plate; 2022. Guide structure; 2023. Ear column; 203. Rubber ring; 204. Blocking frame; 2040. Frame hole; 2041. Elastic hook; 2042 , extension arm; 205, shielding component; 2051, card-mounted spring claw; 2052, front spring claw; 2053, rear spring claw; 206, insulating component; 2061, elastic blocking arm; 2062, card-mounted groove; 2066, plug-in avoidance port; 207, conductive component; 2071, positioning pit; 208, external crimping sleeve; 209, internal crimping ring; 210, wire sealing body; 211, tail wire clamp; 212, tail cover; 2121, anti-sway structure. DETAILED DESCRIPTION

[0025] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0026] The utility model is mainly aimed at existing new energy vehicles 4, especially commercial vehicles, whose power modules have large capacity and are often arranged on the roof, that is, their battery boxes and high-voltage distribution boxes. In this way, the manual maintenance switch (MSD) on the battery box or high-voltage distribution box is also arranged on the roof. Once power is turned off for inspection and maintenance, the operator needs to climb to the roof to disconnect the manual maintenance switch, which is very inconvenient. As in the prior art cited in the background technology, it makes the position of the power battery MSD more free in a certain way, but because it needs to be equipped with a separate power connection box, the volume of the entire device is large and occupies a large installation space.

[0027] The utility model provides a new power battery MSD socket, which can make the layout of the power battery MSD more flexible and free, while reducing the volume of the power battery MSD, thereby reducing its occupied space. The utility model mainly arranges the power battery MSD socket with a fixed connection structure that can be fixed on the installation panel, one port of the socket is used for the power cable to pass through to connect with the conductive parts in the socket, and the other port of the socket has a plug-in cavity, which is a plug-in interface for inserting an adapted MSD plug. By dividing the power cable of a power supply line into sections and connecting pairs of conductive parts respectively, it is equivalent to forming a break between the power cables. When the adapter MSD plug is plugged into the socket, the conductor of the adapter MSD plug connects the pairs of conductive parts in the socket, which is equivalent to connecting the power cable. At this time, normal power supply can be achieved. Pulling out the adapter MSD plug is equivalent to disconnecting the power cable. At this time, safe maintenance can be carried out, thus realizing the product function of the manual maintenance switch. At the same time, since the power cable can be directly connected to the conductive parts in the power battery MSD socket, the position of the power battery MSD socket is not restricted. In theory, the position where the power cable can be laid is the position where the power source MSD socket can be arranged. The key is that this power battery MSD socket is small in size, occupies less space, and is more convenient and flexible to arrange.

[0028] Figure 3-4 That is, it shows the use of the power battery MSD socket 2 of the utility model on the vehicle 4. In the vehicle 4, the power system 40 is arranged at the top of the vehicle 4, and the controller 42 is arranged at the front end of the vehicle 4 near the cockpit. In order to facilitate manual maintenance, the power battery MSD43 is installed on the side panel (i.e., the installation panel) near the front end of the side of the vehicle 4, and then the power battery MSD43 is connected in series to the power cable 41 connecting the power system 40 and the load. The power battery MSD43 is used as an external maintenance switch. Of course, in general, a built-in maintenance switch is also connected in series on the power supply path of the power cable 41 inside the power system 40.

[0029] Specifically speaking, the structure of the power battery MSD socket 2 of the utility model is as follows: Figure 1-2As shown in 5-7, the power battery MSD socket 2 includes a socket shell 202, and the socket shell 202 includes a first shell part and a second shell part. The extension directions of the first shell part and the second shell part are perpendicular to each other and the inner cavities are connected. The second shell part is at the end of the first shell part and the two form an L-shaped curved shell as a whole. An insulator is fixedly installed in the inner cavity of the first shell part, and a pair of conductive components 207 are fixedly arranged in the insulator. The end opening of the first shell part is a threading port for the power cable 41 to pass through, and the end opening of the second shell part is a plug interface for plugging with the adapter MSD plug 1. The conductive component 207 has a plug end corresponding to the plug interface and a wiring terminal close to the threading port. A fixed connection structure for fixing to the installation panel is provided on the first shell part on the side facing away from the second shell part, that is, the fixed base plate 2021 shown in the figure, and a fixed connection hole is provided on the fixed base plate 2021 for matching with the threaded connector to achieve fixed connection.

[0030] In this embodiment, the socket housing 202 is a curved housing, and the openings of the two ports are perpendicular to each other. The main purpose of this design is to facilitate the wiring while facilitating the fixed installation of the socket on the vehicle body 4. Of course, this does not exclude that in other embodiments, the socket housing 202 can be a linear housing, that is, the overall structure is a cylindrical structure with two ends open, one port is a threading port, and the other port is a plug port.

[0031] In the embodiment shown in the figure, the conductive component 207 is a conductive bar, specifically a copper bar, the width direction of the conductive bar extends along the direction of the plug interface, and the two side surfaces of the conductive bar are contact surfaces for plugging and contacting with the clip-type contact pieces adapted to the MSD plug 1. In this way, there is no need to bend the conductive component 207 to adapt to the curved shell, which is more convenient, and the outer dimensions can be flexibly adjusted according to the current carrying capacity and the fixed structure. Of course, in other embodiments, the conductive component 207 can be a conductive pin, in which case the conductive pin needs to be manufactured into an L shape, with one side of the L shape parallel to the first shell part and the other side parallel to the second shell part, so as to facilitate the plugging of the MSD plug 1. This method is also feasible, but the installation of the conductive component 207 in the socket shell 202 will be inconvenient.

[0032] The socket housing 202 generally adopts a metal housing, so it is naturally necessary to ensure the insulation between the conductive component 207 and the socket housing 202, so the conductive component 207 is installed in the insulating component 206, and the conductive component 207 bears a large current and voltage when working. In order to avoid electromagnetic interference and vehicle 4 failure, a shielding component 205 is also provided on the outside of the conductive component 207. The shielding component 205 has a wiring shielding part for connecting with the shielding layer of the power cable 41 and a plug-in shielding part for connecting with the shielding structure of the adapted MSD socket. In the embodiment shown in the figure, two pairs of conductive components 207 are respectively installed in two insulating components 206. The insulating component 206 is a rectangular cylindrical structure with an opening at one end, and has a conductive component 207 insertion slot in its inner cavity. The conductive component 207 is fixedly inserted in the insertion slot in the inner cavity of the insulating component 206 from the opening. The other end of the insulating component 206 is sealed and a plug-in avoidance opening 2066 is opened on a side surface close to the sealed end. The plug-in avoidance opening 2066 is arranged opposite to the plug interface for the plug contact of the MSD plug 1 to be inserted. A shielding component 205 is provided on the outer side of the insulating component 206 to shield the conductive component 207 therein. The shielding component 205 is a shielding shell wrapped around the outer side of the insulating component 206. In this way, the insulating component 206, the conductive component 207, the shielding component 205 and the socket housing 202 are all detachable structures, and each part can be processed independently, which is conducive to industrialization. Of course, in another embodiment, the insulating component 206 can be an integrated structure, and the shielding component 205 is injection molded in the insulating component 206 along with the insulating component 206. Two installation cavities for installing the conductive component 207 are reserved in the insulating component 206, and the shielding component 205 can be arranged around the installation cavity.

[0033] In order to ensure the installation stability of the conductive component 207 in the insulating component 206, at least one side edge of the width direction of the conductive row is provided with a positioning pit 2071 to cooperate with the insulating component 206 in positioning, so as to achieve the relative fixation between the conductive row and the insulating component 206 in the length direction. Specifically, the two side edges of the width direction of the conductive row are respectively provided with positioning pits 2071, and the insulator is designed with elastic blocking arms 2061 facing the positioning pits 2071. When the conductive row is inserted into the insulating component 206, the elastic blocking arms 2061 are inserted into the positioning pits 2071 to stop the conductive row in the direction of disengagement, so as to achieve the fixing of the conductive row in the insulator. Of course, in other embodiments, the conductive row can also be forcibly installed in the insulating component 206, or glued in the insulating component 206.

[0034] The shielding shell is also a cylindrical structure, which is wrapped around the outside of the insulating component 206 as a whole. The shielding shell is fixed outside the insulator through the clamping claw 2051 and the clamping groove 2062 on the insulator. The shielding shell is provided with a front spring claw 2052 corresponding to the plug avoidance port 2066, and a rear spring claw 2053 corresponding to the threading port. The front spring claw 2052 contacts the shielding structure of the MSD plug 1 to achieve shielding conduction between the plug and the socket, and the rear spring claw 2053 indirectly conducts the shielding layer of the power cable 41 to achieve shielding conduction between the power cable 41 and the socket. At this time, the front spring claw 2052 constitutes the plug-in shielding part, and the rear spring claw 2053 constitutes the wiring shielding part.

[0035] A sealing structure is provided at the threading port, so that after the power cable 41 is inserted and connected with the conductive component 207, it can be fixed and sealed at the threading port of the socket housing 202. The sealing structure includes a sealing body 210, a tail wire clamp 211 and a tail cover 212. The sealing body 210, the tail wire clamp 211 and the tail cover 212 are sleeved on the power cable 41, and the sealing of the outlet of the socket is achieved by cooperating with the socket housing 202. The tail wire clamp 211 clamps the wire by cooperating with the tail cover 212 to prevent the torsion of the power cable 41 from affecting the welding between the high-voltage cable and the conductive component 207. The tail cover 212 is used to axially fix the sealing body 210 and the tail wire clamp 211. The sealing structure also includes an anti-sway structure 2121. When the wiring harness is bent, it prevents the wire from extreme swaying, the rubber ring 203 is squeezed unevenly, and the waterproof failure occurs. Since the sealing structure is already a relatively mature technology, it will not be described in detail in this article. However, it should be specially explained that the wire sealing structure includes an outer crimping ring and an inner crimping sleeve, and the outer crimping ring and the inner crimping sleeve are used to cooperate inside and outside to crimp together the shielding layer of the power cable 41, and the outer crimping sleeve 208 has a portion that is sleeved on the shielding component 205, and the rear side spring claw 2053 of the shielding component 205 elastically abuts against the outer crimping sleeve 208, thereby realizing shielding conduction between the shielding component 205 and the power cable 41.

[0036] In order to further improve the insulation protection effect and prevent the conductive component 207 in the socket housing 202 from being exposed after the plug is unplugged, a protective structure is provided at the plug interface to prevent the conductive component 207 from being accidentally touched by a human hand. Figure 8As shown, the protective structure includes a shielding frame 204 fixedly installed in the inner cavity of the second shell component, the shielding frame 204 includes a shielding frame plate adapted to the shape of the plug interface, the outer periphery of the shielding frame plate is sleeved with a rubber ring 203, a frame hole 2040 is reserved on the shielding frame plate, and the frame hole 2040 is used for the contact piece adapted to the MSD plug 1 to pass through to plug and contact with the conductive component 207, and an elastic hook 2041 extends from the edge of the shielding frame plate. When the shielding frame 204 is installed in the inner cavity of the second shell component, the elastic hook 2041 cooperates with the groove on the inside of the second shell component to achieve hook connection, so as to be fixed in the second shell component, and the rubber ring 203 is sandwiched between the shielding frame plate and the inner wall of the plug interface to ensure sealing. The shielding frame plate partially shields the plug interface of the second shell component, and it is not easy for people to reach in, which has high safety.

[0037] Moreover, in this embodiment, the shielding frame 204 also plays a role in preventing the insulating component 206 from falling off and fixing it. As can be seen from the figure, the two opposite edges of the shielding frame plate are also provided with extension arms 2042, and the two extension arms 2042 extend into the edge of the plug-in avoidance opening 2066 of the insulating component 206, so that the insulating component 206 can be blocked in the length direction to prevent it from falling out of the threading opening of the first shell part. A shielding arm is connected between the two extension arms 2042, and the shielding arm blocks the edge of the conductive component 207 facing the plug-in interface, so that the human hand can completely avoid directly touching the conductive component 207. Of course, in other embodiments, the shielding frame 204 can be set independently of the insulating component 206, and the insulating component 206 can be blocked in the inner cavity of the first shell component by the sealing structure set at the threading opening to achieve fixed assembly with the first shell component.

[0038] In addition, in this embodiment, similar to the existing power battery MSD43, the socket housing 202 is designed with a guide structure 2022 and an ear column 2023. When the MSD plug 1 and the socket of the utility model are plugged in, the guide structure 2022 cooperates with the adapter structure on the plug to guide the plug-in, and the handle 201 is rotatably mounted on the ear column 2023. The locking groove 2011 on the handle 201 cooperates with the plug housing to achieve a power assisting effect during the plug-in and unlocking process. This part of the structure is not significantly different from the existing product structure and will not be described in detail.

[0039] The power battery MSD socket of the utility model is mainly used in high-voltage electrical systems and vehicles 4 where the power battery MSD is difficult to operate due to factors such as the power battery MSD being installed at a high position on the equipment body end or being blocked by foreign objects or having limited operating space. By means of a socket that can be wired and a fixed structure on the socket, restrictions on the setting position of the MSD socket are eliminated, making it more flexible and convenient to use.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the description and drawings of the present invention shall be included in the protection scope of the present invention.

Claims

1. Power battery MSD socket, characterized by: It includes a socket shell, which includes a threading port and a plug interface. An insulator is fixedly installed in the inner cavity of the socket shell, and a pair of conductive components are fixedly arranged in the insulator. The conductive components have plugging ends corresponding to the plug interface and wiring ends close to the threading port. The threading port is used for the power cable to pass through and connect with the conductive components, and the plug interface is used for plugging with an adapter MSD plug. The socket shell is also provided with a fixed connection structure for fixing it on the installation panel.

2. The power battery MSD socket according to claim 1, characterized in that: The socket housing comprises a first housing portion and a second housing portion, the extension directions of the first housing portion and the second housing portion are perpendicular to each other and the inner cavities are connected, the second housing portion is located at the end of the first housing portion and the two as a whole form an L-shaped curved housing, the insulator is fixedly installed in the inner cavity of the first housing portion, the end opening of the first housing portion constitutes the threading port, the end opening of the second housing portion constitutes the plug-in port, and the fixed connection structure is provided on the first housing portion on the side facing away from the second housing portion.

3. The power battery MSD socket according to claim 2, characterized in that: The conductive component is a conductive bar, the width direction of the conductive bar extends along the direction of the plug interface, and the two side surfaces of the conductive bar are contact surfaces for plugging and contacting with the plug contacts of the MSD plug.

4. The power battery MSD socket according to claim 3 is characterized in that: The insulator includes a pair of insulating parts, and the two paired conductive parts are respectively installed in the two insulating parts. The insulating part is a rectangular cylindrical structure with an open end. The conductive part is fixedly inserted in the inner cavity of the insulating part from the opening. The other end of the insulating part is sealed and a plug-in avoidance opening is opened on a side surface close to the sealed end. The plug-in avoidance opening is arranged opposite to the plug interface for the plug contact of the MSD plug to be inserted.

5. The power battery MSD socket according to claim 4, characterized in that: At least one side edge of the conductive bar in the width direction is provided with a positioning recess for positioning and cooperating with the insulating component, so as to achieve relative fixation between the conductive bar and the insulating component in the length direction.

6. The power battery MSD socket according to claim 4, characterized in that: A shielding component is arranged outside the insulating component to shield the conductive component inside the insulating component. The shielding component comprises a wiring shielding portion for connecting with the shielding layer of the power cable and a plug-in shielding portion for connecting with the shielding structure of the MSD socket.

7. The power battery MSD socket according to claim 6, characterized in that: The shielding component is a shielding shell wrapped around the outer side of the insulating component. The shielding shell is provided with a front spring claw at the plug-in avoidance opening for elastically contacting the shielding structure of the MSD socket. The front spring claw constitutes a plug-in shielding part.

8. The power battery MSD socket according to claim 7, characterized in that: A wire sealing structure is provided at the wire threading port, and the wire sealing structure includes an outer crimping ring and an inner crimping sleeve. The outer crimping ring and the inner crimping sleeve are used to cooperate with each other inside and outside to be crimped together with the shielding layer of the power cable. The shielding shell is provided with a rear spring claw for elastically contacting the outer crimping sleeve, and the rear spring claw constitutes a wiring shielding part.

9. The power battery MSD socket according to any one of claims 4 to 8, characterized in that: A protective structure is provided at the plug interface to prevent people from accidentally touching the conductive parts.

10. The power battery MSD socket according to claim 9, characterized in that: The protective structure includes a shielding frame fixedly installed in the inner cavity of the second shell component, the shielding frame is adapted to the shape of the plug-in interface, the frame hole thereon is used for the contact piece adapted to the MSD plug to pass through so as to engage with the conductive component, and the shielding frame and the insulating component are engaged with each other to achieve anti-slip fixation of the insulating component in the inner cavity of the first shell component.

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