Low-voltage plug-in connection components, battery devices and electrical equipment

Abstract

This disclosure provides a low-voltage plug-in connection assembly, a battery device, and an electrical appliance. The low-voltage plug-in connection assembly includes: a fixing device comprising a housing with an internal accommodating space, the housing including a first sidewall with a first opening; a circuit board including a first main body and a second main body connected at an angle to each other, the first main body located within the accommodating space and the second main body located outside the accommodating space; and a low-voltage plug-in located within the accommodating space and fixedly connected to the first main body, the plug-in's socket being configured to communicate with the outside of the fixing device through the first opening. This low-voltage plug-in connection assembly utilizes the first main body to change the orientation of the low-voltage plug-in, allowing the plug-in to change its orientation according to the size of the space outside the socket, thereby reducing the restriction of the insertion direction by narrow spaces.

Description

Technical Field

[0001] This disclosure relates to the field of power battery technology, and in particular to a low-voltage plug-in connection assembly, a battery device, and an electrical device. Background Technology

[0002] New energy vehicles use battery devices (such as power batteries) as their core power source. The battery device includes modules such as battery modules, battery management system, thermal management system and high-voltage electrical components, which can efficiently store and release electrical energy to provide continuous and stable power output for the electric motor.

[0003] Battery modules typically utilize low-voltage connectors to transmit signals, control commands, and provide low-voltage power. As new energy vehicles trend towards smaller size and lighter weight, the space available for battery module placement is decreasing. The small gaps between the low-voltage connector's ports and other structures limit the port's orientation. Summary of the Invention

[0004] In view of the above problems, this application provides a low-voltage plug connection component, a battery device, and an electrical device, aiming to solve the problem of the limited orientation of the low-voltage plug of the battery.

[0005] This disclosure provides a low-voltage plug-in connection assembly, comprising: a fixing device including a housing, the housing having an accommodating space inside, the housing including a first sidewall and having a first opening on the first sidewall; a circuit board including a first main body portion and a second main body portion connected at an angle to each other, the first main body portion being located within the accommodating space and the second main body portion being located outside the accommodating space; and a low-voltage plug-in, located within the accommodating space and fixedly connected to the first main body portion, the plug-in's socket being configured to communicate with the outside of the fixing device through the first opening.

[0006] In the technical solution of this application embodiment, the low-voltage plug-in connection assembly includes a fixing device, a circuit board, and a low-voltage plug-in. The circuit board includes a first main body and a second main body connected at an angle to each other. The first main body is located within an accommodating space inside the housing of the fixing device, and the second main body is located outside the accommodating space. The low-voltage plug-in is fixedly connected to the first main body, and the socket of the low-voltage plug-in communicates with the outside of the fixing device through a first opening. This low-voltage plug-in connection assembly reduces the circuit board located inside the fixing device by changing the angle of the first and second main bodies, thereby helping to reduce the volume of the fixing device. In addition, by utilizing the first main body at an angle to the second main body, the low-voltage plug-in is also set at an angle to the second main body. Compared to a low-voltage plug-in connected to a flat circuit board, this low-voltage plug-in connection assembly allows the low-voltage plug-in to change the setting direction of its socket in its plane to adapt to the size of the space outside the socket, thereby reducing the restriction of the insertion direction by narrow spaces. In addition, the first main body and the low-pressure plug are both located within the housing space, which helps the housing to protect and limit the first main body and the low-pressure plug, thereby improving the stability and durability of the first main body and the low-pressure plug.

[0007] In some embodiments, the fixing device further includes a limiting portion located within the accommodating space and configured to limit the low-voltage plug.

[0008] The limiting part constrains the position of the low-voltage plug in the accommodating space, which is beneficial to the installation stability of the low-voltage plug, reduces the shaking of the low-voltage plug during the operation of new energy vehicles, thus helps to avoid poor contact between the socket and the plug, and also helps to reduce the deformation stress at the connection point between the low-voltage plug and the circuit board.

[0009] In some embodiments, the limiting portion includes an elastic element configured to apply an elastic force to the low-pressure insert to secure it.

[0010] Incorporating elastic elements improves the installation stability of low-voltage connectors. By applying elastic force, the elastic element both constrains the displacement of the low-voltage connector and allows for minor deformation during insertion and removal within the housing space, thus buffering vibrations or impacts. Furthermore, the elastic force helps to adaptively compensate for assembly tolerances or dimensional differences caused by manufacturing processes within the housing space.

[0011] In some embodiments, the first body portion includes a first groove; the elastic element and the low-pressure insert are respectively located on both sides of the first body portion along the thickness direction, and the elastic element is configured to pass through the first groove and abut against the low-pressure insert.

[0012] By creating a first groove in the first main body and allowing the elastic element to pass through the first groove and abut against the low-pressure plug, it is beneficial to make full use of the space within the fixing device and improve space utilization. The elastic element and the low-pressure plug are positioned on opposite sides of the thickness direction of the first main body, and the elastic element passes through the first groove and abuts against the low-pressure plug, which helps to reduce the size of the fixing device along the thickness direction of the first main body.

[0013] In some embodiments, the housing includes a second sidewall and a third sidewall, the third sidewall being disposed opposite to the first sidewall, and the second sidewall being connected between the first sidewall and the third sidewall on the side away from the circuit board; the limiting portion includes: a first limiting plate, close to the third sidewall and spaced apart from the third sidewall; and a second limiting plate, connected to the first limiting plate, the second limiting plate being close to the second sidewall and disposed opposite to it.

[0014] The first and second limiting plates help to create a more compact space around the low-voltage component, further restricting its position within the accommodating space and limiting its displacement towards the second and third sidewalls. Furthermore, the first and second limiting plates facilitate the formation of a double-layer structure with the second and third sidewalls respectively, improving the housing's resistance to deformation. Additionally, the asymmetrical structure of the first and second limiting plates allows operators to quickly install circuit boards and low-voltage components based on their positions within the accommodating space.

[0015] In some embodiments, the pins of the low-voltage plug are located within the space enclosed by the first main body, the first limiting plate, and the second limiting plate.

[0016] In related technologies, the pins of low-voltage connectors are exposed and easily damaged by impacts from external objects, leading to malfunctions. To avoid this problem, adhesive is typically applied to the pins; however, this results in additional processes and manufacturing costs. In this application, the space enclosed by the first main body, the first limiting plate, and the second limiting plate provides protection for the pins, preventing them from being damaged by external objects. Furthermore, it saves on the adhesive application process and improves manufacturing efficiency.

[0017] In some embodiments, the limiting portion includes an elastic element configured to apply an elastic force to the low-pressure insert to fix the low-pressure insert; the elastic element and the second limiting plate are respectively located on both sides of the first opening.

[0018] The elastic element and the second limiting plate are located on opposite sides of the first opening, which helps to make full use of the space within the housing. Furthermore, this arrangement facilitates the limiting of the low-pressure plug in two directions, improving the installation stability of the low-pressure plug.

[0019] In some embodiments, the housing includes a third sidewall and a fourth sidewall, the third sidewall being disposed opposite to the first sidewall, and the fourth sidewall being connected between the first sidewall and the third sidewall on the side near the circuit board; the limiting portion includes: a third limiting plate connected to the inner wall of the fourth sidewall; and a fourth limiting plate disposed opposite to and spaced apart from the third sidewall, with one side of the fourth limiting plate connected to the inner wall of the fourth sidewall; wherein the third limiting plate, the fourth limiting plate, and the fourth sidewall form a second groove.

[0020] The second groove formed by the fourth sidewall, the third limiting plate and the fourth limiting plate is conducive to placing the welding structure located on the side of the circuit board away from the low-voltage plug-in, which is conducive to improving the structural integration within the fixing device, making full use of the space within the housing, and thus helping to reduce the size of the fixing device.

[0021] In some embodiments, the housing includes a second opening at the top of the housing; the fixing device further includes a support portion connected to the second opening of the housing and extending outward, configured to support the second main body portion.

[0022] The support section helps prevent the second main body from shifting due to vibration or external forces when suspended in the external environment. Furthermore, since the second main body is located outside the accommodating space, its connection with the first main body is prone to stress concentration due to lack of support, potentially leading to fatigue fracture. The support section helps to support the free end of the second main body, thereby helping to prevent electrical connection failures within the circuit board.

[0023] In some embodiments, the low-voltage plug connection assembly includes a connector configured to securely connect the support portion to the second body portion.

[0024] The support part and the second main body are fixedly connected by connectors, which helps to prevent the low-voltage plug from being pulled by the circuit board due to shaking, which could cause the pins to become unsoldered and the sampling function to fail.

[0025] In some embodiments, a cover plate is also included, which is detachably attached to the top of the housing and covers the second opening.

[0026] Covering the second opening with a cover plate helps to create a semi-enclosed receiving space, preventing dust from falling into the receiving space and protecting the pins, which helps to extend the service life of low-voltage plugs.

[0027] In some embodiments, the low-voltage plug includes a plug body and a bent pin, with a first end of the pin connected to a side wall of the plug body away from the socket, and a second end of the pin electrically connected to the first body portion.

[0028] Bending the pins helps to make the low-voltage plug-in structure more compact and improves its integration in the fixture. In addition, the bent pins can be arranged along the contour of the inner wall of the housing (e.g., close to the inner wall or avoiding protruding structures), thereby reducing the volume occupied by the low-voltage plug-in and enabling compact installation of the low-voltage plug-in within the housing space.

[0029] In some embodiments, a plug portion is further included, which protrudes outward relative to the bottom surface of the housing and is used to mount the fixing device.

[0030] The outward-protruding connector facilitates quick positioning and assembly, and also improves installation stability.

[0031] Secondly, this application provides a battery device comprising: the low-voltage plug connection assembly of the above embodiments; and a plug configured to be pluggably connected to the low-voltage plug via the socket.

[0032] In some embodiments, the low-voltage plug-in connection assembly further includes a plug portion that protrudes outward relative to the bottom surface of the housing; the battery device includes a base that includes a slot that mates with the plug portion.

[0033] The slot and connector fit together to facilitate rapid assembly of the low-voltage plug-in connection assembly with the base. In addition, the sidewall of the slot provides circumferential constraint to the connector, which helps absorb multi-directional loads from insertion and removal operations or external vibrations, making the fit between the connector and the base more stable and preventing poor contact caused by vibration loosening of the plug and low-voltage connector.

[0034] Thirdly, this application provides an electrical device that includes the low-voltage plug-in connection assembly and / or the battery device in the above embodiments.

[0035] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0036] The accompanying drawings, which are included to provide a further understanding of this disclosure and form part of this application, illustrate exemplary embodiments of this disclosure and are used to explain this disclosure, but do not constitute an undue limitation of this disclosure. In the drawings:

[0037] Figure 1 This is a schematic diagram of the structure of an electrical device according to some embodiments of this application, showing the location where the battery device is installed.

[0038] Figure 2This is an exploded structural diagram of a battery device according to some embodiments of this application.

[0039] Figure 3 This is a structural schematic diagram of a portion of the low-voltage plug-in connection assembly according to some embodiments of this application, showing the fixing device, plug-in portion and cover plate.

[0040] Figure 4 This is a schematic diagram of a low-voltage plug-in connection assembly mounted on a base according to some embodiments of this application, showing a fixedly connected low-voltage plug-in connection assembly and base.

[0041] Figure 5 for Figure 4 The diagram shows an exploded view of the low-voltage plug-in connection component.

[0042] Figure 6 This is a schematic diagram of the structure of a low-voltage plug connection assembly of a battery device according to some embodiments of this application, where the plug is inserted into the base.

[0043] The reference numerals in the detailed embodiments are as follows:

[0044] D. Vehicle; B. Battery device;

[0045] 100. Box body; 200. Box lid; C. Storage space;

[0046] 20. Battery pack; 201. Battery cell;

[0047] 1. Fixing device; 1A. Accommodating space; 1a. First opening; 1b. Second groove; 10. Housing; 10b. Second opening; 101. First side wall; 102. Second side wall; 103. Third side wall; 104. Fourth side wall; 11. First limiting plate; 12. Second limiting plate; 12a. Groove; 13. Third limiting plate; 14. Fourth limiting plate; 15. Elastic element; 16. Support part; 16a. First mounting hole; 2. Cover plate; 3. Insertion part; 5. Low-voltage plug; 5a. Socket; 51. Plug body; 511. Slot; 52. Pin; 6. Base; 6a. Slot; 7. Circuit board; 71. First main body part; 72. Second main body part;

[0048] 8. Plug. Detailed Implementation

[0049] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this disclosure or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0050] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of this disclosure. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0051] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0052] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0053] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0054] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0055] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0056] In the description of this disclosure, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are generally based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this disclosure and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this disclosure; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0057] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0058] Low-voltage connectors are critical electrical interfaces used to connect battery management systems, sensors, communication modules, and other control units, primarily responsible for transmitting signals, power, and data. The voltage range of low-voltage connectors is typically 12V to 24V, and their functions include real-time monitoring of battery status (such as temperature, voltage, and current), enabling inter-module communication (such as CAN bus), and controlling charging and discharging logic. The pins and body of low-voltage connectors are mostly made of corrosion-resistant alloys and engineering plastics.

[0059] In the low-voltage plug-in connection assembly, the fixing device is used to fix the low-voltage plug-in to prevent the low-voltage plug-in from becoming loose or falling off during the handling or operation of the electrical equipment, thereby reducing the impact of vibration and impact on the low-voltage plug-in and thus improving the reliability and durability of the battery device.

[0060] However, as new energy vehicles trend towards miniaturization, the internal space of battery devices is becoming increasingly limited. This necessitates the integration of multiple components or modules within a confined space to meet assembly efficiency requirements. While mounting devices in related technologies can secure the low-voltage connectors, they occupy a significant amount of space. Furthermore, these mounting devices need to guide the insertion orientation of the low-voltage connectors to a space where there is no interface interference between the connectors and other devices, thereby improving the space utilization of the power battery system. Therefore, space constraints often restrict the insertion direction.

[0061] To improve the limitations of low-voltage plug-in socket placement, embodiments of this disclosure provide a low-voltage plug-in connection assembly for a battery device. The low-voltage plug-in connection assembly includes a fixing device, a circuit board, and a low-voltage plug-in. The circuit board includes a first main body and a second main body connected at an angle to each other. The first main body is located within an accommodating space inside the housing of the fixing device, and the second main body is located outside the accommodating space. The low-voltage plug-in is fixedly connected to the first main body, and its socket communicates with the outside of the fixing device through a first opening. This low-voltage plug-in connection assembly, by changing the angle of the first and second main bodies, reduces the amount of circuit board within the fixing device, thereby reducing the size of the fixing device. Simultaneously, by using the first main body to change the orientation of the low-voltage plug-in, the low-voltage plug-in can change its socket orientation along its plane according to the size of the space outside the socket, thereby reducing the limitations of narrow spaces on the insertion direction.

[0062] This disclosure also provides a battery device including the low-voltage plug connection assembly and plug described above. The plug is configured to be pluggably connected to the low-voltage plug via a socket.

[0063] The battery device in the embodiments of this application refers to a single physical module comprising one or more battery cells to provide higher voltage and capacity. The battery device mentioned in this application may include battery modules or battery packs, etc. The battery pack includes a battery case for encapsulating one or more battery cells, the battery case including a case body and a case cover. The battery case can prevent liquids or other foreign matter from affecting the charging or discharging of the battery cells.

[0064] In this application, the battery cell may include lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-metal hydride batteries, nickel-cadmium batteries, lead-acid batteries, etc., and the embodiments of this application are not limited to these. The battery cell may be flat, cuboid, or other shapes, and the embodiments of this application are not limited to these. The battery cell is generally packaged as a square battery cell or a pouch battery cell, and the embodiments of this application are not limited to these.

[0065] This disclosure also provides an electrical device. The electrical device includes the low-voltage plug-in connection assembly described above and / or the battery device described above. The battery device is configured to provide electrical power to the electrical device. The electrical device can be, but is not limited to, mobile phones, portable devices, laptops, electric vehicles, electric cars, ships, spacecraft, electric toys, and power tools, etc. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers. The electrical device can be any of the aforementioned devices or systems that utilize a battery device.

[0066] In the following description, "before" refers to Figure 3 "Rear" refers to the side perpendicular to the first sidewall and close to the first sidewall; "rear" refers to the side opposite to "front," and "left" and "right" correspond to... Figure 3 The left and right directions in the middle.

[0067] According to some embodiments of this application, a low-voltage plug-in connection component is provided. For example... Figures 3 to 5 As shown, the low-voltage plug-in connection assembly includes a fixing device 1, a circuit board 7, and a low-voltage plug-in 5. The fixing device 1 includes a housing 10. The housing 10 has an accommodating space 1A inside. The housing 10 includes a first sidewall 101, and a first opening 1a is formed on the first sidewall 101. The circuit board 7 includes a first main body portion 71 and a second main body portion 72 connected at an angle to each other. The first main body portion 71 is located within the accommodating space 1A, and the second main body portion 72 is located outside the accommodating space 1A. The low-voltage plug-in 5 is located within the accommodating space 1A and is fixedly connected to the first main body portion 71. The socket 5a of the low-voltage plug-in 5 is configured to communicate with the outside of the fixing device 1 through the first opening 1a.

[0068] Optionally, further refer to Figure 3 The first main body 71 is arranged vertically, and the side of the second main body 72 connected to the first main body 71 is arranged horizontally. By vertically arranging the first main body 71 of the circuit board 7, it forms a perpendicular angle with a portion of the second main body 72, thereby making the socket 5a of the low-voltage plug 5 vertical. This helps to align the plug insertion path with the vertical space, freeing up redundant area in the limited horizontal space, thus helping to avoid interference from surrounding components. In practical applications, especially in the compact layout inside the power battery pack, the vertical arrangement of the socket 5a helps to improve the plug insertion efficiency and the reliability of the insertion structure.

[0069] Optionally, in some embodiments (not shown), the second main body portion 72 may be arranged in a horizontal direction, and the first main body portion 71 may be arranged in a direction that forms an obtuse angle with the second main body portion 72.

[0070] Optionally, in some embodiments (not shown), the first main body portion 71 and the second main body portion 72 may both be arranged at an angle to the horizontal direction.

[0071] The low-voltage plug-in connection assembly disclosed herein includes a fixing device 1, a circuit board 7, and a low-voltage plug-in 5. The circuit board 7 includes a first main body portion 71 and a second main body portion 72 connected at an angle to each other. The first main body portion 71 is located within an accommodating space 1A inside the housing 10 of the fixing device 1, and the second main body portion 72 is located outside the accommodating space 1A. The low-voltage plug-in 5 is fixedly connected to the first main body portion 71, and the insertion port 5a of the low-voltage plug-in 5 communicates with the outside of the fixing device 1 through a first opening 1a. This low-voltage plug-in connection assembly reduces the number of circuit boards 7 located inside the fixing device 1 by changing the angle of the first main body portion 71 and the second main body portion 72, thereby helping to reduce the size of the fixing device 1. Furthermore, this low-voltage plug-in connection assembly utilizes a first main body 71 angled to the second main body 72, allowing the low-voltage plug-in 5 to also be angled to the second main body 72. Compared to a low-voltage plug-in connected to a flat circuit board, this low-voltage plug-in connection assembly allows the low-voltage plug-in 5 to change the orientation of its socket 5a within its plane, adapting to the size of the space outside the socket 5a, thereby reducing the restriction of the insertion direction by narrow spaces. Additionally, both the first main body 71 and the low-voltage plug-in 5 are located within the accommodating space 1A of the housing 10, which facilitates the housing 10 in providing protection and limiting the first main body 71 and the low-voltage plug-in 5, thereby improving the stability and durability of the first main body 71 and the low-voltage plug-in 5.

[0072] According to some embodiments of this application, the fixing device 1 may optionally include a limiting portion. The limiting portion is located within the accommodating space 1A and is configured to limit the low-voltage plug 5.

[0073] Optionally, in some embodiments (not shown), the limiting part is embedded in the receiving space 1A, for example, by engaging or abutting to limit the movement of the low-voltage plug 5 in the receiving space 1A.

[0074] The limiting part constrains the position of the low-voltage plug-in within the accommodating space 1A, which is beneficial to the installation stability of the low-voltage plug-in 5, reduces the shaking of the low-voltage plug-in 5 during the operation of new energy vehicles, thus helps to avoid poor contact between the socket 5a and the plug, and also helps to reduce the deformation stress at the connection point between the low-voltage plug-in 5 and the circuit board 7.

[0075] According to some embodiments of this application, optionally, such as Figures 3 to 5As shown, the limiting part includes an elastic element 15. The elastic element 15 is configured to apply an elastic force to the low-pressure plug 5 to fix the low-pressure plug 5. The elastic element 15 is, for example, an elastic clip, a spring, etc.

[0076] The elastic element 15 improves the installation stability of the low-voltage plug-in 5. By applying an elastic force, the elastic element 15 both constrains the displacement of the low-voltage plug-in 5 and allows for minor deformation during insertion and removal within the accommodating space 1A to buffer vibrations or impacts. Furthermore, the elastic force helps to adaptively compensate for assembly tolerances or dimensional differences caused by manufacturing processes within the accommodating space 1A.

[0077] According to some embodiments of this application, optionally, such as Figures 3 to 5 As shown, the first main body 71 includes a first groove. An elastic element 15 and a low-pressure insert 5 are located on opposite sides of the first main body 71 along its thickness direction. The elastic element 15 is configured to pass through the first groove and abut against the low-pressure insert 5.

[0078] Optionally, further refer to Figures 3 to 5 The elastic element 15 is positioned near the first opening 1a, and the first groove is formed on the front side of the first main body 71. The proximity of the elastic element 15 to the first opening 1a improves the installation stability of the low-voltage plug-in 5 near the socket, thereby enhancing the insertion stability of the plug-in structure. Furthermore, the first groove on the front side of the first main body 71 visually assists operators in quickly locating the installation orientation of the circuit board 7.

[0079] The first groove is formed in the first main body 71, and the elastic element 15 passes through the first groove and abuts against the low-pressure plug 5. This helps to make full use of the space inside the fixing device 1 and improve space utilization. The elastic element 15 and the low-pressure plug 5 are respectively placed on both sides of the thickness direction of the first main body 71, and the elastic element 15 passes through the first groove and abuts against the low-pressure plug 5. This helps to reduce the size of the fixing device 1 along the thickness direction of the first main body 71.

[0080] According to some embodiments of this application, optionally, such as Figures 3 to 5 As shown, the housing 10 includes a second sidewall 102 and a third sidewall 103. The third sidewall 103 is disposed opposite to the first sidewall 101. The second sidewall 102 is connected between the first sidewall 101 and the third sidewall 103 on the side away from the circuit board 7. The limiting portion includes a first limiting plate 11 and a second limiting plate 12. The first limiting plate 11 is close to the third sidewall 103 and is disposed opposite to the third sidewall 103. The second limiting plate 12 is connected to the first limiting plate 11, and the second limiting plate 12 is close to the second sidewall 102 and is disposed opposite to it.

[0081] Optionally, further refer to Figure 3The second limiting plate 12 may include a groove 12a communicating with the first opening 1a. The groove 12a of the second limiting plate 12 is configured to mate with the shape of at least a portion of the plug body 51 of the low-voltage plug 5, so that the plug body 51 is installed in the groove 12a of the second limiting plate 12. This arrangement helps to improve the installation stability of the low-voltage plug 5 and prevents the connection position of the socket 5a and the plug 8 from becoming loose.

[0082] The first limiting plate 11 and the second limiting plate 12 facilitate the formation of a more compact space around the low-voltage plug-in 5, further restricting the position of the low-voltage plug-in 5 within the accommodating space 1A and limiting its displacement towards the second sidewall 102 and the third sidewall 103. Furthermore, the first limiting plate 11 and the second limiting plate 12 facilitate the formation of a double-layer structure with the second sidewall 102 and the third sidewall 103 respectively, which improves the deformation resistance of the housing 10. Additionally, the asymmetrical structure of the first limiting plate 11 and the second limiting plate 12 allows operators to quickly install the circuit board 7 and the low-voltage plug-in 5 based on their positions within the accommodating space 1A.

[0083] According to some embodiments of this application, optionally, such as Figures 3 to 5 As shown, the pin 52 of the low-voltage plug 5 is located within the space enclosed by the first main body 71, the first limiting plate 11, and the second limiting plate 12.

[0084] In related technologies, the pins of low-voltage connectors are exposed and easily damaged by impacts from external objects, leading to malfunctions. To avoid this problem, adhesive is typically applied to the pins; however, this results in additional processes and manufacturing costs. In this application, the space enclosed by the first main body 71, the first limiting plate 11, and the second limiting plate 12 provides protection for the pins 52, preventing them from being damaged by external objects. Furthermore, it saves on the adhesive application process and improves manufacturing efficiency.

[0085] According to some embodiments of this application, optionally, such as Figures 3 to 5 As shown, the elastic element 15 and the second limiting plate 12 are located on both sides of the first opening 1a, respectively.

[0086] The elastic element 15 and the second limiting plate 12 are located on both sides of the first opening 1a, which helps to make full use of the space inside the housing 10. In addition, this arrangement helps to limit the low-pressure plug 5 in two directions, improving the installation stability of the low-pressure plug 5.

[0087] According to some embodiments of this application, optionally, such as Figures 3 to 5As shown, the housing 10 includes a third sidewall 103 and a fourth sidewall 104. The third sidewall 103 is disposed opposite to the first sidewall 101, and the fourth sidewall 104 is connected between the first sidewall 101 and the third sidewall 103 on the side near the circuit board 7. The limiting part includes a third limiting plate 13 and a fourth limiting plate 14. The third limiting plate 13 is connected to the inner wall of the fourth sidewall 104. The fourth limiting plate 14 is disposed opposite to and spaced apart from the third sidewall 103, and one side of the fourth limiting plate 14 is connected to the inner wall of the fourth sidewall 104. The third limiting plate 13, the fourth limiting plate 14, and the fourth sidewall 104 form a second groove 1b. The second groove 1b formed by the fourth sidewall 104, the third limiting plate 13, and the fourth limiting plate 14 is beneficial for placing the welding structure located on the side of the circuit board 7 away from the low-voltage plug-in 5, which is beneficial for improving the structural integration within the fixing device 1, and for making full use of the space within the housing 10, thereby reducing the size of the fixing device 1.

[0088] Optionally, in some embodiments (not shown), the limiting portion may also include a boss protruding from the inner wall of the housing 10 into the accommodating space 1A.

[0089] According to some embodiments of this application, optionally, such as Figures 3 to 5 As shown, the housing 10 includes a second opening 10b, which is formed at the top of the housing 10. The fixing device 1 also includes a support 16, which is connected to the position of the second opening 10b of the housing 10 and extends outward, and is configured to support the second main body 72.

[0090] The support portion 16 helps to prevent the second main body portion 72 from shifting due to vibration or external force interference when suspended in the external environment. In addition, since the second main body portion 72 is located outside the accommodating space 1A, its connection with the first main body portion 71 is prone to stress concentration due to lack of support, which may lead to fatigue fracture. The support portion 16 helps to support the free end of the second main body portion 72, thereby helping to prevent electrical connection failure within the circuit board 7.

[0091] According to some embodiments of this application, optionally, such as Figures 3 to 5 As shown, the low-voltage plug-in connection assembly includes a connector. The connector is configured to securely connect the support portion 16 to the second main body portion 72.

[0092] The support part 16 and the second main body part 72 are fixedly connected by a connector, which helps to prevent the circuit board 7 from shaking and pulling the low-voltage plug 5, causing the pin 52 to become unsoldered and the sampling function to fail.

[0093] According to some embodiments of this application, optionally, such as Figures 3 to 5 As shown, the low-pressure plug connection assembly also includes a cover plate 2. The cover plate 2 is detachably attached to the top of the housing 10 and covers the second opening 10b.

[0094] Covering the second opening 10b with the cover plate 2 helps to form a semi-enclosed accommodating space 1A, preventing dust from falling into the accommodating space 1A and protecting the pin 52, which helps to extend the service life of the low-voltage plug 5.

[0095] According to some embodiments of this application, optionally, such as Figures 3 to 5 As shown, the low-voltage plug 5 includes a plug body 51 and a bent pin 52. The first end of the pin 52 is connected to the side wall of the plug body 51 away from the socket 5a, and the second end of the pin 52 is electrically connected to the first body portion 71.

[0096] Optionally, further refer to Figure 3 and Figure 5 The low-voltage plug 5 has a pin 52 comprising a first pin segment and a second pin segment. The first pin segment extends in a direction parallel to the second limiting plate 12, with one end connected to the side wall of the plug body 51 away from the socket 5a, and the other end connected to the second pin segment. The second pin segment extends in a direction parallel to the first limiting plate 11, with one end connected to the first pin segment and the other end electrically connected to the first body portion 71.

[0097] Optionally, further refer to Figure 5 A slot 511 is provided on the side of the plug body 51 away from the first body part 71. The slot 511 is configured to cooperate with the buckle on the plug 8 to fix the plug 8 and the low-voltage plug 5 in place, which helps to improve the stability of the connection between the plug 8 and the low-voltage plug 5.

[0098] The bending of the pin 52 helps to make the low-voltage plug 5 compact and improves the integration of the low-voltage plug 5 in the fixing device 1. In addition, the bent pin 52 can be arranged along the contour of the inner wall of the housing 10 (e.g., close to the inner wall or avoiding the protruding structure), thereby reducing the volume occupied by the low-voltage plug 5 and realizing the compact installation of the low-voltage plug 5 within the accommodating space 1A.

[0099] According to some embodiments of this application, optionally, such as Figures 3 to 5 As shown, the low-voltage plug-in connection assembly also includes a plug-in portion 3. The plug-in portion 3 protrudes outward relative to the bottom surface of the housing 10 and is used to install the fixing device 1.

[0100] The outwardly protruding insertion part 3 facilitates quick positioning and assembly, and also improves installation stability.

[0101] According to some embodiments of this application, this application also provides a battery device including a low-voltage plug connection assembly and a plug 8 as described in any of the above embodiments. The plug 8 is configured to be pluggably connected to the low-voltage plug 5 via a socket 5a.

[0102] According to some embodiments of this application, optionally, such as Figures 3 to 5As shown, the battery device includes a base 6. The base 6 includes a slot 6a, which mates with the insertion part 3.

[0103] The engagement of slot 6a with connector 3 facilitates rapid assembly of the low-voltage plug-in connection assembly with base 6. Furthermore, the sidewall of slot 6a provides circumferential constraint to connector 3, which helps absorb multi-directional loads from insertion / removal operations or external vibrations, resulting in a more stable fit between connector 3 and base 6. This helps prevent poor contact between plug 8 and low-voltage plug 5 due to vibration-induced loosening.

[0104] Optionally, in some embodiments (not shown), the connector 3 and the base 6 can also be fixed by means of bolts, clips, rivets, adhesives, etc. For example, a clip can be provided on the connector 3, and a slot can be provided on the base 6.

[0105] According to some embodiments of this application, this application also provides an electrical device including the battery device and / or low-voltage plug-in connection assembly described in any of the above embodiments.

[0106] The following combination Figures 1 to 5 The present application will provide a more detailed description of a low-voltage plug-in connection assembly, a battery device B having the low-voltage plug-in connection assembly, and an electrical device having the battery device B, according to some embodiments of the present application.

[0107] Please refer to Figure 1 . Figure 1 This is a schematic diagram of the structure of an electrical device—vehicle D—provided in some embodiments of this application. Vehicle D can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended vehicles, etc. Figure 2 The vehicle D has a battery device B installed inside it. The battery device B is located at the bottom of the vehicle D, or it can be located at the front or rear (not shown). The battery device B can be used to power the vehicle D, for example, it can be used as the operating power source for the vehicle D.

[0108] In some embodiments of this application, the battery device B can not only serve as the operating power source for the vehicle D, but also as the driving power source for the vehicle D, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle D.

[0109] Please refer to Figure 2 . Figure 2 This is an exploded structural diagram of the battery device B provided in some embodiments of this application. The battery device B is in the form of a battery pack, and its battery box includes a box body 100, a box cover 200 fastened to the box body 100, and a plurality of battery cells 201 housed in the housing space C enclosed by the box body 100 and the box cover 200.

[0110] Battery device B includes a low-voltage plug connection assembly, a plug 8, and a base 6.

[0111] like Figure 2 As shown in the above embodiments, the housing 100 and the cover 200 are generally rectangular parallelepipeds. In embodiments not shown, the housing 100 may also be other shapes, such as a cylinder. In some embodiments, the housing 100 may be part of the vehicle's chassis structure. For example, a portion of the housing 100 may be at least a portion of the vehicle's floor, or a portion of the housing 100 may be at least a portion of the vehicle's crossbeams and longitudinal beams.

[0112] The battery cell 201 mainly includes a cell, a casing, and an end cap assembly. The cell may include one, two, or more electrode assemblies. The cell is encapsulated within the casing's receiving space by the end caps of the end cap assembly, and electrolyte is added to the receiving space. The electrode assemblies are disposed within the receiving space of the casing. The electrode assemblies are the components in the battery cell 201 where electrochemical reactions occur.

[0113] In battery device B, there are multiple battery cells 201, which can be connected in series, parallel, or in a mixed manner. A mixed connection means that multiple battery cells 201 are connected in both series and parallel configurations. Multiple battery cells 201 can be directly connected in series, parallel, or in a mixed manner, and then the entire assembly of these multiple battery cells 201 is housed within the housing space C.

[0114] like Figure 2 As shown, the battery device B can be composed of multiple battery cells 201 connected in series, parallel, or in a mixed configuration to form a battery pack 20. The battery pack 20 can be in the form of a battery module. Multiple battery packs 20 can then be connected in series, parallel, or in a mixed configuration to form a whole, which is housed within the housing space C. The battery device B may also include other structures; for example, the battery device B may also include a busbar component for realizing electrical connections between the multiple battery cells 201.

[0115] In battery device B, to ensure the safety and performance of battery cells 201 within battery device B, a heat exchange component (not shown) is provided in the housing space C of battery device B. The heat exchange component contains coolant to exchange heat between the heat exchange component and the battery cells 201, thereby improving the safety and operational reliability of battery device B.

[0116] like Figures 3 to 5 As shown, the low-voltage connection assembly includes a fixing device 1, a circuit board 7, a low-voltage plug 5, a connector, a plug-in portion 3, and a cover plate. The fixing device 1 includes a housing 10. The housing 10 has an accommodating space 1A inside. The housing 10 includes a first side wall 101, and a first opening 1a is formed on the first side wall 101.

[0117] The circuit board 7 includes a first main body portion 71 and a second main body portion 72 connected at an angle to each other. The first main body portion 71 is located within the accommodating space 1A, and the second main body portion 72 is located outside the accommodating space 1A. The sides of the first main body portion 71 and the second main body portion 72 connected to the first main body portion 71 are perpendicular to each other, and the first main body portion 71 is vertically located within the accommodating space 1A. This arrangement helps to reduce the number of circuit boards 7 located within the fixing device 1, thereby helping to reduce the size of the fixing device 1.

[0118] The low-voltage plug 5 is located within the accommodating space 1A and is fixedly connected to the first main body 71. The socket 5a of the low-voltage plug 5 is configured to communicate with the outside of the fixing device 1 through the first opening 1a. By changing the orientation of the low-voltage plug 5 using the first main body 71, the low-voltage plug 5 can change the setting direction of the socket 5a along the plane according to the size of the space outside the socket 5a, thereby reducing the restriction of the insertion direction on the narrow space.

[0119] The connector is configured to fix the support portion 16 to the second main body portion 72. The fixed connection between the support portion 16 and the second main body portion 72 by the connector helps to prevent the circuit board 7 from shaking and pulling the low-voltage plug-in 5, which could cause the pin 52 to become detached and result in sampling function failure.

[0120] The housing 10 includes a second opening 10b, which is located at the top of the housing 10. The first main body 71 is installed into the receiving space 1A through the second opening 10b. The cover 2 is detachably connected to the top of the housing 10 and covers the second opening 10b. Covering the second opening 10b with the cover 2 helps to form a semi-enclosed receiving space 1A, preventing dust from falling into the receiving space 1A and protecting the pin 52, which in turn helps to extend the service life of the low-voltage plug 5.

[0121] The insertion part 3 protrudes outward relative to the bottom surface of the housing 10. The insertion part 3 is a triangular pyramid, and the cross-section of the insertion part 3 perpendicular to the protrusion direction is triangular. Please refer to... Figure 3 The base 6 includes a slot 6a. The slot 6a is shaped to fit the insertion part 3, and the slot 6a and the insertion part 3 are interference-fitted.

[0122] like Figure 3 As shown, the fixing device 1 includes a housing 10, a limiting part, and a supporting part 16. The housing 10 includes a first sidewall 101, a second sidewall 102, a third sidewall 103, and a fourth sidewall 104 that are perpendicular to each other. The first sidewall 101 is located on the front side of the housing 10. The third sidewall 103 is disposed opposite to the first sidewall 101. The second sidewall 102 connects the first sidewall 101 and the third sidewall 103 and is located on the right side of the housing 10. The fourth sidewall 104 connects the first sidewall 101 and the third sidewall 103 and is located on the left side of the housing 10.

[0123] like Figure 3 and Figure 5 As shown, the limiting part includes a first limiting plate 11, a second limiting plate 12, a third limiting plate 13, a fourth limiting plate 14, and an elastic element 15. The first limiting plate 11 is located near the third side wall 103 and is spaced apart from the third side wall 103. The rear end of the second limiting plate 12 is connected to the right end of the first limiting plate 11. The front end of the second limiting plate 12 is connected to the first side wall 101. The second limiting plate 12 is located near the second side wall 102 and is spaced apart from it.

[0124] like Figure 3 and Figure 5 As shown, the third limiting plate 13 is fitted to the fourth side wall 104, and one side of the third limiting plate 13 is connected to the first side wall 101.

[0125] like Figure 3 and Figure 5 As shown, the fourth limiting plate 14 is close to the third side wall 103 and is spaced apart from the third side wall 103. The left side of the fourth limiting plate 14 is connected to the fourth side wall 104, and the right side is spaced apart from the first limiting plate 11.

[0126] A second groove 1b is formed between the third limiting plate 13, the fourth limiting plate 14, and the fourth side wall 104. The first main body 71 is located in the accommodating space in a direction parallel to the second side wall 102 and the fourth side wall 104. The left side of the first main body 71 has a welding structure, which is accommodated in the second groove 1b.

[0127] like Figure 3 and Figure 5 As shown, the elastic element 15 is an elastic snap-fit. The elastic element 15 is connected to the side of the third limiting plate 13 facing away from the third sidewall 103 along the thickness direction. The first main body 71 includes a first groove. The elastic element 15 and the low-pressure plug 5 are respectively located on both sides of the first main body 71 along the thickness direction. The elastic element 15 is configured to pass through the first groove and abut against the low-pressure plug 5, and apply pressure to the left side of the low-pressure plug 5 to fix the low-pressure plug 5.

[0128] The low-voltage plug 5 includes a plug body 51 and a bent pin 52. The socket 5a of the low-voltage plug 5 is located on the front side of the plug body 51. The pin 52 is located within the space enclosed by the first body 71, the first limiting plate 11, and the second limiting plate 12.

[0129] The insert 52 includes a first insert segment and a second insert segment. The first insert segment extends in a direction parallel to the second limiting plate 12, with one end connected to the side wall of the insert body 51 away from the socket 5a, and the other end connected to the second insert segment. The second insert segment extends in a direction parallel to the first limiting plate 11, with one end connected to the first insert segment and the other end electrically connected to the first body portion 71.

[0130] like Figure 3 and Figure 5 As shown, the second limiting plate 12 may include a groove 12a, which is disposed on the front side of the second limiting plate 12 and communicates with the right side of the first opening 1a. The groove 12a of the second limiting plate 12 is configured to mate with the shape of a portion of the plug body 51 of the low-voltage plug 5, so that the low-voltage plug 5 is installed in the groove 12a of the second limiting plate 12.

[0131] The elastic element 15 fits against the side of the low-voltage plug-in 5, pressing the plug-in body 51 firmly within the groove 12a. This helps to counteract vibrations caused by factors such as those experienced by new energy vehicles, and avoids the risk of breakage due to hard impacts between the pins 52 of the low-voltage plug-in 5 and the solder joints of the circuit board 7. Furthermore, the springback characteristics of the elastic element 15 can adaptively adjust the position of the low-voltage plug-in 5 when operators frequently plug and unplug it, which helps to improve structural compactness, installation stability, and operational fault tolerance.

[0132] like Figures 3 to 5 As shown, the fixing device 1 also includes a support portion 16, which is connected to the second opening 10b of the housing 10 and extends outward, configured to support the second main body portion 72. The support portion 16 has a first mounting hole 16a. The second main body portion 72 has a second mounting hole corresponding to the position of the first mounting hole 16a. A connecting member includes a bolt. The connecting member passes through the first mounting hole 16a and the second mounting hole to securely connect the support portion 16 and the second main body portion 72 together.

[0133] The description of the various embodiments above tends to emphasize the differences between the various embodiments. The similarities or similarities between them can be referred to, and for the sake of brevity, they will not be repeated here.

[0134] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and not to limit them; although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this disclosure or equivalent substitutions can be made to some technical features, all of which should be covered within the scope of the technical solutions claimed in this disclosure.

Claims

1. A low voltage plug-in connection assembly, characterized in that The low-voltage plug-in connection assembly comprises: a fixing device (1) comprising a shell (10) and a limiting part, an accommodating space (1A) being arranged in the shell (10), the limiting part being arranged in the accommodating space (1A), the shell (10) comprising a first side wall (101), and a first opening (1a) being arranged on the first side wall (101); a circuit board (7) comprising a first main body part (71) and a second main body part (72) which are connected at an angle, the first main body part (71) being arranged in the accommodating space (1A), and the second main body part (72) being arranged outside the accommodating space (1A); and a low-voltage plug-in (5) arranged in the accommodating space (1A) and fixedly connected to the first main body part (71), a plug opening (5a) of the low-voltage plug-in (5) being configured to communicate with the outside of the fixing device (1) through the first opening (1a); wherein the limiting part is configured to limit the low-voltage plug-in (5).

2. The low voltage plug-in connection assembly according to claim 1, characterized in that The limiting part comprises an elastic element (15) configured to apply an elastic force to the low-voltage plug-in (5) to fix the low-voltage plug-in (5).

3. The low-voltage plug-in connection assembly according to claim 2, wherein: the first main body part (71) comprises a first groove; the elastic element (15) and the low-voltage plug-in (5) are respectively arranged on two sides of the first main body part (71) in the thickness direction, and the elastic element (15) is configured to abut against the low-voltage plug-in (5) through the first groove.

4. The low voltage plug-in connection assembly according to claim 1, characterized in that The shell (10) comprises a second side wall (102) and a third side wall (103), the third side wall (103) being arranged opposite to the first side wall (101), and the second side wall (102) being connected to one side of the first side wall (101) and the third side wall (103) away from the circuit board (7); the limiting part comprises: a first limiting plate (11) arranged close to the third side wall (103) and spaced apart from the third side wall (103) oppositely; and a second limiting plate (12) connected to the first limiting plate (11), the second limiting plate (12) being arranged close to the second side wall (102) oppositely.

5. The low voltage plug-in connection assembly according to claim 4, characterized in that The pin (52) of the low-voltage plug-in (5) is arranged in a space surrounded by the first main body part (71), the first limiting plate (11) and the second limiting plate (12).

6. The low-voltage plug-in connection assembly according to claim 4, wherein: the limiting part comprises an elastic element (15) configured to apply an elastic force to the low-voltage plug-in (5) to fix the low-voltage plug-in (5); the elastic element (15) and the second limiting plate (12) are respectively arranged on two sides of the first opening (1a).

7. The low voltage plug-in connection assembly according to claim 1, characterized in that The shell (10) comprises a third side wall (103) and a fourth side wall (104), the third side wall (103) is arranged opposite to the first side wall (101), and the fourth side wall (104) is connected to the first side wall (101) and the third side wall (103) and is arranged on the side close to the circuit board (7); the limiting part comprises: a third limiting plate (13) connected to the inner wall of the fourth side wall (104); and a fourth limiting plate (14) arranged opposite to and spaced from the third side wall (103), and one side of the fourth limiting plate (14) is connected to the inner wall of the fourth side wall (104); wherein the third limiting plate (13), the fourth limiting plate (14) and the fourth side wall (104) form a second groove (1b).

8. The low-voltage plug-in connection assembly according to any one of claims 1 to 7, wherein the shell (10) comprises a second opening (10b) formed on the top of the shell (10); the fixing device (1) further comprises a support part (16) connected to the position of the second opening (10b) of the shell (10) and extending outward, configured to support the second main body part (72).

9. The low voltage plug-in connection assembly according to claim 8, characterized in that The low-voltage plug-in connection assembly comprises a connecting piece configured to fixedly connect the support part (16) and the second main body part (72).

10. The low voltage plug-in connection assembly according to claim 8, characterized in that Further comprising a cover plate (2) detachably connected to the top of the shell (10) and covering the second opening (10b).

11. The low voltage plug-in connection assembly according to any of claims 1-7, characterized in that, The low-voltage plug-in (5) comprises a plug-in main body (51) and a bent pin (52), the first end of the pin (52) is connected to the side wall of the plug-in main body (51) away from the socket (5a), and the second end of the pin (52) is electrically connected to the first main body part (71).

12. The low voltage plug-in connection assembly according to any of claims 1-7, characterized in that, Further comprising a plug-in part (3) protruding outward relative to the bottom surface of the shell (10) and used for mounting the fixing device (1).

13. A battery device characterized by comprising: comprising: the low-voltage plug-in connection assembly according to any one of claims 1 to 12; and a plug (8) configured to be plug-in connectable with the low-voltage plug-in (5) through the socket (5a).

14. The battery device according to claim 13, wherein the low-voltage plug-in connection assembly further comprises a plug-in part (3) protruding outward relative to the bottom surface of the shell (10); the battery device comprises a base (6) comprising a slot (6a) matched with the plug-in part (3). comprising the low-voltage plug-in connection assembly according to any one of claims 1 to 12, or the battery device according to claim 13 or 14.

15. An electrical device, characterized by ​

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