Battery device, electric device and connector

Abstract

The utility model discloses a battery device, a power utilization device and a connector. The battery device comprises a box body with an accommodating cavity; the at least one battery monomer assembly is accommodated in the accommodating cavity; at least part of the connector is located in the accommodating cavity, the connector is electrically connected with the battery monomer assembly to form an electrical loop, the connector is used for controlling the on-off of the electrical loop, and the connector comprises a first connecting end and a second connecting end; the first connecting end is provided with a shell, a first inserting part installed on the shell, a plurality of spring pieces connecting the shell and the first inserting part, and a first guiding body connected to the first inserting part. The second connecting end is provided with a second plugging part, the second plugging part and the first plugging part can be plugged or separated along the plugging direction so as to be electrically connected or disconnected, and the first plugging part floats along the direction vertical to the plugging direction relative to the shell under the cooperation of the first guiding body and the second plugging part and is plugged with the second plugging part. Therefore, the connector can absorb assembly errors, and the use reliability of the battery device can be improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery device, an electrical device and a connector. Background Art

[0002] New energy battery devices are increasingly used in life and industry. For example, new energy vehicles equipped with batteries have been widely used. In addition, battery devices are increasingly used in the field of energy storage. In new energy vehicles equipped with batteries, battery devices can be used to provide power in whole or in part. In the field of energy storage, battery devices can be installed in energy storage boxes or directly on the user side.

[0003] A manual service disconnect (MSD) is usually provided in a battery device to temporarily disconnect the battery high voltage system during maintenance. The manual service disconnect usually includes a connector, and the connection reliability of the connector has an impact on the reliability of the battery device. Therefore, how to improve the connection reliability of the connector in the battery device has become one of the industry's issues. Utility Model Content

[0004] In order to solve the above technical problems, the present application provides a battery device, an electrical device and a connector, which can absorb assembly errors when the connector is connected, thereby improving the connection reliability of the connector and further improving the use reliability of the battery device.

[0005] This application is implemented through the following technical solutions.

[0006] The first aspect of the present application provides a battery device, comprising: a box body, having a accommodating cavity; at least one battery cell assembly, accommodated in the accommodating cavity; a connector, at least partially located in the accommodating cavity and electrically connected to the battery cell assembly to form an electrical circuit, the connector being used to control the on and off of the electrical circuit, the connector comprising a first connecting end and a second connecting end, the first connecting end having a shell, a first plug-in portion mounted on the shell, a plurality of spring members connecting the shell and the first plug-in portion, and a first guide body connected to the first plug-in portion; the second connecting end having a second plug-in portion, the second plug-in portion being able to be plugged in or separated from the first plug-in portion along a plug-in direction so as to be electrically connected or disconnected, the first plug-in portion floating relative to the shell in a direction perpendicular to the plug-in direction and plugged in with the second plug-in portion under the cooperation of the first guide body and the second plug-in portion.

[0007] Therefore, with the cooperation of the first guide body and the second plug-in part, the first plug-in part floats relative to the shell in a direction perpendicular to the plug-in direction, so that the first plug-in part and the second plug-in part are quickly aligned, thereby making the first plug-in part and the second plug-in part smoothly plugged in, and being able to absorb the assembly error of the connector, thereby improving the connection reliability of the connector and further improving the use reliability of the battery device.

[0008] In some embodiments, the first plug-in portion includes: a plug-in body, which is located in the shell and connected to the shell through the spring member; a plug-in extension body, which is connected to the plug-in body and passes through the first shell wall of the shell along the plug-in direction and extends out of the shell, and the plug-in extension body can be plugged with the second plug-in portion under guidance.

[0009] Since the first plug-in part includes a plug-in body and a plug-in extension body, and the plug-in body is connected to the housing through a spring member, the first plug-in part is easier to connect to the housing and can float. Since the plug-in extension body penetrates the first housing wall of the housing along the first direction and extends out of the housing and the plug-in extension body is connected to the plug-in body, the plug-in extension body can be driven to float, so that the first plug-in part and the second plug-in part are easier to align and plug, and this structure is simple in design and easy to manufacture.

[0010] In some embodiments, the first guide body is disposed around the plug extension body, and a guide surface is provided on the portion of the first guide body away from the plug main body along the plug direction, and during the plugging process of the first plug part and the second plug part, the second plug part contacts the guide surface. During the plugging process, the second plug part contacts the guide surface, thereby guiding the first plug part to float in a direction perpendicular to the plugging direction during the plugging process, allowing the first plug part and the second plug part to be quickly aligned, so that the first plug part and the second plug part can be plugged smoothly, thereby absorbing the assembly error of the connector, improving the connection reliability of the connector, and further improving the use reliability of the battery device.

[0011] In some embodiments, a first opening is formed in the first shell wall, the first guide body and the plug-in extension body penetrate the first shell wall via the first opening, and a gap is formed between an inner periphery of the first opening and the first guide body.

[0012] Thus, there is a gap between the inner periphery of the first opening and the first guide body, so that the first guide body and the plug extension body can float in a direction perpendicular to the plugging direction with a simple structure, so that the first plug part and the second plug part can be plugged smoothly.

[0013] In some embodiments, the spring member includes a plurality of first spring members, the plurality of first spring members respectively connect the housing and the first plug-in portion along a direction intersecting the plug-in direction, and at least two of the first spring members are disposed opposite to each other with the first plug-in portion interposed therebetween.

[0014] Thus, the first plug portion can be stably floated in a direction intersecting the plugging direction, thereby improving the ability of the connector to absorb assembly errors in the direction intersecting the plugging direction.

[0015] In some embodiments, an even number of the first spring members are provided, and the even number of the first spring members are distributed around the first plug-in portion in a symmetrical manner about an axis.

[0016] As a result, the first plug-in portion can be subjected to balanced force and can float in a stable state, which is beneficial to improving the ability of the connector to absorb assembly errors in a direction intersecting the plug-in direction.

[0017] In some embodiments, four first spring members are provided, and the four first spring members are connected to the plug-in body at equal angles to each other.

[0018] As a result, the force on the first plug-in portion can be further balanced, and the first plug-in portion can float in a stable state, which is beneficial to improving the ability of the connector to absorb assembly errors in a direction intersecting the plug-in direction.

[0019] In some embodiments, the spring member further includes a second spring member, and the second spring member connects the housing and the first plug-in portion along the plug-in direction.

[0020] Thereby, the first plug-in part can float along the plug-in direction, so that the first plug-in part can maintain a good connection state with the second plug-in part under the action of the second spring member, has good electrical connection reliability, and can also absorb assembly errors along the plug-in direction, thereby further improving the connector's ability to absorb assembly errors in the plug-in direction.

[0021] In some embodiments, the first guide body includes a first guide section and a second guide section connected along the plug-in direction, one end of the first guide section is connected to the plug-in body, and the other end is connected to the second guide section, and the second guide section is formed so that the inner diameter increases as it is farther away from the first guide section, and the inner circumferential surface of the second guide section provides the guide surface, and along the plug-in direction, the plug-in extension body does not exceed the first guide section.

[0022] Since the second guide section is formed so that the further away from the first guide section, the larger the inner diameter, it is beneficial for the guide surface of the first guide body to contact the second plug-in portion during plugging, so that the first plug-in portion and the second plug-in portion can be plugged smoothly, thereby absorbing the assembly error within a large range of the connector and improving the reliability of the battery device. In addition, since the plug-in extension body does not exceed the first guide section, the plug-in extension body can be roughly aligned with the second plug-in portion under the guidance of the second guide section before plugging with the second plug-in portion, so that the plug-in extension body can be quickly aligned with the second plug-in portion, reducing the risk of damage to the plug-in extension body due to misaligned plugging.

[0023] In some embodiments, the second connection end further has a second guide body, and the first plug-in portion floats relative to the housing and is plugged into the second plug-in portion under the cooperation of the first guide body and the second guide body.

[0024] Therefore, with the cooperation of the first guide body and the second guide body, the first plug-in portion floats relative to the shell in a direction perpendicular to the plug-in direction, so that the first plug-in portion and the second plug-in portion are quickly aligned, thereby making the first plug-in portion and the second plug-in portion smoothly plugged in, and being able to absorb the assembly error of the connector, thereby improving the connection reliability of the connector and further improving the use reliability of the battery device.

[0025] In some embodiments, the second plug-in portion has a plug-in sleeve extending along the plug-in direction, and the plug-in extension body floats relative to the housing in a direction perpendicular to the plug-in direction under the cooperation of the first guide body and the plug-in sleeve, and the plug-in extension body extends into the plug-in sleeve.

[0026] Therefore, the alignment of the plug-in extension body and the hollow portion of the plug-in sleeve can be achieved through the cooperation between the first guide body and the plug-in sleeve, so that the plug-in can be performed quickly and accurately.

[0027] In some embodiments, the second connecting end further has a second guide body, and the second guide body is protruded from the outer peripheral surface of the plug-in sleeve, and the second guide body is formed so that the farther away from the first plug-in part, the higher the height of the protrusion from the outer peripheral surface is, and when the first plug-in part and the second plug-in part are plugged in, the guide surface contacts the second guide body.

[0028] In this way, under the guidance of the first guide body and the second guide body, the first plug-in part and the second plug-in part can be further aligned. Moreover, since the guide surface is in contact with the second guide body in the plugged state, the possibility of relative shaking between the first plug-in part and the second plug-in part is reduced, which is beneficial to maintaining the plug-in stability and further improving the connection reliability of the connector.

[0029] In some embodiments, the first plug-in portion has a first contact electrode, which is at least partially exposed at the end of the plug-in extension body facing the second plug-in portion; the second plug-in portion has a second contact electrode, which is at least partially exposed at a position in the plug-in sleeve facing the first plug-in portion, the first plug-in portion is plug-connected to the second plug-in portion, and the first contact electrode and the second contact electrode are in contact with each other.

[0030] Thus, the first plug-in portion and the second plug-in portion can be electrically connected by contacting each other, so that the on and off of the electrical circuit can be easily controlled.

[0031] In some embodiments, the connector also includes at least two contact terminals, each contact terminal includes a first contact and a second contact, the first contact and the second contact can be connected or separated, and each contact terminal is used to access the electrical circuit, and when the first contact and the second contact are connected and the first plug-in part and the second plug-in part are plugged in, the electrical circuit can be connected; when the first contact and the second contact are separated and / or the first plug-in part and the second plug-in part are separated, the electrical circuit is disconnected.

[0032] Thereby, an electrical connector with an interlocking function can be formed, thereby further improving the protective effect of the connector.

[0033] In some embodiments, the battery device further includes: a cover body connected to the box body and closing the accommodating cavity, and the first connecting end is connected to the cover body.

[0034] Thus, as the cover is separated from the box, the connection between the first connection end and the second connection end is disconnected, so that once the cover is opened, the connector cuts off the electrical circuit in the battery device, reducing the risk of electric shock after the cover is opened.

[0035] In some embodiments, the accommodating cavity includes a first accommodating cavity and a second accommodating cavity, the battery cell assembly is accommodated in the first accommodating cavity, the connector is accommodated in the second accommodating cavity, and the first accommodating cavity and the second accommodating cavity share a cover.

[0036] Therefore, as long as the cover is opened, the connector cuts off the electrical circuit in the battery device, reducing the risk of electric shock after the cover is opened.

[0037] In some embodiments, the accommodating cavity includes a first accommodating cavity and a second accommodating cavity, the battery cell assembly is accommodated in the first accommodating cavity, the connector is accommodated in the second accommodating cavity, the cover body includes a first cover body and a second cover body which are separately arranged, the first cover body closes the first accommodating cavity, the second cover body closes the second accommodating cavity, and the first connecting end is connected to the second cover body.

[0038] Thus, the second accommodating cavity can be opened independently of the first accommodating cavity accommodating the battery cell assembly, and once the second cover body closing the second accommodating cavity is opened, the connection between the first connecting end and the second connecting end is disconnected, so that the second accommodating cavity can be operated in the power-off state.

[0039] In some embodiments, the opening of the second accommodating cavity is configured as a maintenance port of the battery device.

[0040] This enables maintenance to be carried out in a power-off state.

[0041] A second aspect of the present application provides an electrical device, which includes the battery device of the first aspect of the present application, and the battery device is used to store or provide electrical energy.

[0042] Since the reliability of the battery device is improved, the reliability of the power-consuming device is also improved; moreover, the electrical circuit between the power-consuming device and the battery device can be operated in a power-off state, thereby reducing the risk of electric shock.

[0043] The third aspect of the present application provides a connector, which is used to control the on and off of an electrical circuit. The connector includes a first connection end and a second connection end, the first connection end having a shell, a first plug-in portion installed on the shell, a plurality of spring members connecting the shell and the first plug-in portion, and a first guide body connected to the first plug-in portion; the second connection end has a second plug-in portion, the second plug-in portion can be plugged in or separated from the first plug-in portion along a plug-in direction so as to be electrically connected or disconnected, and the first plug-in portion floats relative to the shell in a direction perpendicular to the plug-in direction and is plugged in with the second plug-in portion under the cooperation of the first guide body and the second plug-in portion.

[0044] Therefore, with the cooperation of the first guide body and the second plug-in part, the first plug-in part floats in a direction perpendicular to the plug-in direction, so that the first plug-in part and the second plug-in part are quickly aligned, thereby making the first plug-in part and the second plug-in part smoothly plugged in, and being able to absorb the assembly error of the connector, thereby improving the connection reliability of the connector and further improving the use reliability of the battery device.

[0045] The beneficial effects of the present application include: being able to absorb the assembly error of the connector, thereby being able to improve the connection reliability of the connector, and further improving the use reliability of the battery device. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0047] Figure 1 A schematic diagram of the structure of a vehicle provided for some embodiments of the present application;

[0048] Figure 2 A schematic diagram of a partial structure of a battery device provided in some embodiments of the present application;

[0049] Figure 3 A schematic diagram of the structure of a connector and a cover body in a connected state provided in some embodiments of the present application;

[0050] Figure 4 A schematic diagram of a three-dimensional structure of a connector in a connected state provided for some embodiments of the present application;

[0051] Figure 5 A schematic diagram of the structure of a first connection end provided for some embodiments of the present application;

[0052] Figure 6 A schematic diagram of a partial three-dimensional structure of a connector provided in some embodiments of the present application;

[0053] Figure 7 A schematic diagram of a partial top view of a connector provided in some embodiments of the present application;

[0054] Figure 8 A bottom view schematic diagram of a first connection end provided for some embodiments of the present application;

[0055] Fig. 9 Some embodiments of the present application provide Figure 8 AA section view;

[0056] Fig.10 Some embodiments of the present application provide Figure 8 BB cross-sectional view;

[0057] Fig.11 A schematic diagram of a side view structure of a first connection end provided in some embodiments of the present application;

[0058] Fig.12 Some embodiments of the present application provide Fig.11 CC section view;

[0059] Fig.13 A schematic top view of a battery device provided for some embodiments of the present application.

[0060] Description of Reference Numerals

[0061] 1000 vehicle; 100 battery device; 200 controller; 300 motor; 101 housing; 102 first cover; 103 opening; 105 second cover; 106 cover; S accommodating chamber; S1 first accommodating chamber; S2 second accommodating chamber; 1 connector; 11 first connecting end; 111 housing; 1111 first opening; 1113 first housing wall; 1114 mounting flange; 112 first plug-in portion; 1121 plug-in main body; 1122 plug-in extension body; 1123 first connection contact electrode; 1124 second contact electrode; 113 spring member; 1131 first spring member; 1132 second spring member; 12 second connection end; 121 second plug-in portion; 1211 plug-in sleeve; 13 contact terminal; 131 first contact; 132 second contact; 14 connector cover; 15 connector base; 21 first guide body; 211 guide surface; 212 first guide section; 213 second guide section; 22 second guide body; X first direction; Y second direction; Z third direction. DETAILED DESCRIPTION

[0062] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0063] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in this application are intended to cover non-exclusive inclusions.

[0064] In the description of the embodiments of the present application, the technical terms "first", "second", "third", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0065] Reference to "embodiment" herein means that a particular feature, structure or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0066] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0067] In the description of the embodiments of the present application, the orientation or position relationship indicated by technical terms such as "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", and "circumferential" are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, they should not be understood as limitations on the embodiments of the present application.

[0068] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0069] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the technical term "contact" should be understood in a broad sense, and may be direct contact or contact through an intermediate medium layer. It may be contact with essentially no interaction force between the two contacting parties, or it may be contact with interaction force between the two contacting parties.

[0070] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the technical terms "parallel" and "perpendicular" are both allowed to have a certain degree of tolerance and / or error, including the situations of being approximately parallel and approximately perpendicular.

[0071] Below, the embodiments of the present application are described in detail.

[0072] New energy battery devices are increasingly used in life and industry. For example, new energy vehicles equipped with batteries have been widely used. In addition, battery devices are increasingly used in the field of energy storage. In new energy vehicles equipped with batteries, battery devices can be used to provide power in whole or in part. In the field of energy storage, battery devices can be installed in energy storage boxes or directly on the user side.

[0073] A manual service switch (MSD: Manual Service Disconnect) is usually provided in the battery device, which is used to temporarily disconnect the high-voltage system of the battery in maintenance and other situations. The manual service switch can be installed between the electrode terminals of the battery cell assembly in the battery device, or can be installed between electrically connected battery modules, or can be installed between the battery device and the electrical appliances in the electrical device. The manual service switch usually includes a connector, and the connection reliability of the connector has an impact on the reliability of the battery device. The connector usually includes at least one pair of connecting terminals. The connecting terminals may have assembly errors during connection due to manufacturing tolerances, manufacturing errors, etc. Such assembly errors may cause the connecting terminals to be unable to maintain a good and stable connection state, and may therefore cause poor connection of the battery device. Therefore, how to improve the connection reliability of the connector in the battery device has become one of the industry's needs.

[0074] According to research, if the connector can absorb assembly errors, it will be beneficial to improve the connection reliability of the connector and even the battery device. In addition, according to research, it is found that the assembly error of the connection terminal in the connector in the plug-in and unplug direction (or the approach and distance direction) may affect the connection reliability, and the assembly error in the direction perpendicular to the plug-in and unplug direction may also affect the connection reliability. Therefore, the embodiment of the present application provides a connector that can absorb assembly errors to a greater extent and thus further improve the connection reliability, and a battery device equipped with such a connector.

[0075] In order to achieve the above-mentioned purpose, an embodiment of the present application provides a battery device, including: a box body, having a accommodating cavity; at least one battery cell assembly, accommodated in the accommodating cavity; a connector, at least partially located in the accommodating cavity and electrically connected to the battery cell assembly to form an electrical circuit, the connector is used to control the on and off of the electrical circuit, the connector includes a first connecting end and a second connecting end, the first connecting end has a shell, a first plug-in portion installed on the shell, a plurality of spring members connecting the shell and the first plug-in portion, and a first guide body connected to the first plug-in portion; the second connecting end has a second plug-in portion, the second plug-in portion can be plugged in or separated from the first plug-in portion along a plug-in direction so as to be electrically connected or disconnected, and the first plug-in portion floats relative to the shell in a direction perpendicular to the plug-in direction and is plugged in with the second plug-in portion under the cooperation of the first guide body and the second plug-in portion.

[0076] Therefore, with the cooperation of the first guide body and the second plug-in part, the first plug-in part floats relative to the shell in a direction perpendicular to the plug-in direction, so that the first plug-in part and the second plug-in part are quickly aligned, thereby making the first plug-in part and the second plug-in part smoothly plugged in, and being able to absorb the assembly error of the connector, thereby improving the connection reliability of the connector and further improving the use reliability of the battery device.

[0077] In addition, the connector of the embodiment of the present application may further include contact terminals for electrical connection, so that it can be used as a connector with an interlocking connection function, for example, it can be used as a manual maintenance switch.

[0078] The battery device of the embodiment of the present application can be applicable to various electrical devices using battery devices, such as mobile phones, portable devices, laptop computers, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, etc. For example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.

[0079] The battery device of the embodiment of the present application is also applicable to an energy storage device, which may be, for example, an energy storage box, an energy storage cabinet, an energy storage container, etc.

[0080] The connector according to the embodiment of the present application may be applicable to a battery device.

[0081] In the following, the electric device of some embodiments of the present application is taken as an example of a vehicle 1000. The following description is made in conjunction with the accompanying drawings.

[0082] Figure 1 The schematic diagram of the structure of a vehicle 1000 provided in some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended range vehicle. Figure 1 As shown, a battery device 100 is disposed inside the vehicle 1000, and the battery device 100 can be disposed at the bottom, head, or tail of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000, for example, the battery device 100 can be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery device 100 to power the motor 300, for example, for the starting, navigation, and working power requirements of the vehicle 1000 during driving.

[0083] In some embodiments of the present application, the battery device 100 can not only serve as an operating power source for the vehicle 1000, but also serve as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0084] Figure 2A schematic diagram of the partial structure of a battery device provided in some embodiments of the present application.

[0085] The battery device (Battery Apparatus) mentioned in the embodiments of the present application may include one or more battery cell components ( Figure 2 The battery cell assembly (not shown) is used to provide voltage and capacity. The battery cell assembly (Battery Cell Assembly) may include multiple battery cells, and the multiple battery cells are connected in series, parallel or mixed through a bus. Multiple battery cells are electrically connected to form a power supply circuit, and the motor 300 of the electric vehicle or other electrical appliances are connected to the power supply circuit to form an electrical loop. In some embodiments, a connector 1 (described in detail later) can be connected to the electrical circuit to control the on and off of the electrical circuit.

[0086] In some embodiments, a battery cell assembly is generally formed by arranging a plurality of battery cells.

[0087] As an example, the battery cell assembly may be a battery module, which is formed by arranging and fixing a plurality of battery cells to form an independent module. As an example, the battery module may be formed by bundling a plurality of battery cells by a cable tie.

[0088] In some embodiments, the battery device may be a battery pack, which includes a case and one or more battery cell assemblies, wherein the battery cell assemblies are accommodated in the case.

[0089] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box by fixing the battery module in the box.

[0090] As an example, the battery cell assembly may also be housed in the case by directly fixing a plurality of battery cells to the case.

[0091] In some embodiments, Figure 2 As shown, the battery device 100 includes a box body 101 and a cover body. The box body 101 has a receiving cavity S, and at least one battery cell assembly (not shown in the figure) is received in the receiving cavity S. The cover body can be connected to the box body 101 and close the receiving cavity S. Optionally, the cover body is connected to the box body 101, for example, by bolt connection.

[0092] In some embodiments, optionally, the box body 101 includes a receiving chamber S, in which the battery cell assembly and the connector 1 (described in detail later) are both received, and the receiving chamber S is closed by a common cover.

[0093] Also optionally, the box 101 has a storage chamber S, which may include a first storage chamber S1 and a second storage chamber S2, the battery cell assembly is stored in the first storage chamber S1, and the connector 1 is stored in the second storage chamber S2. Further optionally, the first storage chamber S1 and the second storage chamber S2 may share a cover to be closed; or the cover includes a first cover and a second cover 105 which are separately arranged, the first cover closes the first storage chamber S1, and the second cover 105 closes the second storage chamber S2. Thus, the second cover 105 can be opened independently of the first cover.

[0094] In some embodiments, the opening of the second receiving chamber S2 is configured as a maintenance port for the battery device 100 .

[0095] When the second cover 105 is opened, maintenance personnel or maintenance tools can enter the maintenance opening to perform operations.

[0096] In some embodiments, the second receiving chamber S2 further receives a battery management module (not shown in the figure). Of course, the battery management module may also be disposed at other appropriate locations.

[0097] Below, refer to Figures 2 to 13 Some embodiments of the present application are described in detail.

[0098] Figure 2 A schematic diagram of a partial structure of a battery device provided in some embodiments of the present application; Figure 3 A schematic diagram of the structure of a connector and a cover body in a connected state provided in some embodiments of the present application; Figure 4 A schematic diagram of a three-dimensional structure of a connector in a connected state provided for some embodiments of the present application; Figure 5 A schematic diagram of the structure of a first connection end provided for some embodiments of the present application; Figure 6 A schematic diagram of a partial three-dimensional structure of a connector provided in some embodiments of the present application; Figure 7 A schematic diagram of a partial top view of a connector provided in some embodiments of the present application; Figure 8 A bottom view schematic diagram of a first connection end provided for some embodiments of the present application; Fig. 9 Some embodiments of the present application provide Figure 8 AA section view; Fig.10 Some embodiments of the present application provide Figure 8 BB cross-sectional view; Fig.11 A schematic diagram of a side view structure of a first connection end provided in some embodiments of the present application; Fig.12 Some embodiments of the present application provide Fig.11 CC section view; Fig.13 A schematic top view of a battery device provided for some embodiments of the present application.

[0099] In the description of the embodiments of the present disclosure, for the convenience of explanation, the direction of the arrow X represents the “first direction” and the “plugging direction of the first connection end and the second connection end”, the direction of the arrow Y represents the “second direction”, and the direction of the arrow Z represents the “third direction”, and the “first direction”, the “second direction” and the “third direction” intersect each other.

[0100] First, as Figures 3 to 12 As shown, the present application provides a battery device 100, which includes: a box body 101, having a accommodating cavity S; at least one battery cell assembly (not shown), accommodated in the accommodating cavity S; a connector 1, at least partially located in the accommodating cavity S and electrically connected to the battery cell assembly (not shown) to form an electrical circuit, the connector 1 is used to control the on and off of the electrical circuit, the connector 1 includes a first connecting end 11 and a second connecting end 12, the first connecting end 11 has a shell 111, a first plug-in portion 112 installed on the shell 111, a plurality of spring members 113 connecting the shell 111 and the first plug-in portion 112, and a first guide body 21 connected to the first plug-in portion 112; the second connecting end 12 has a second plug-in portion 121, the second plug-in portion 121 can be plugged in or separated from the first plug-in portion 112 so as to be electrically connected or disconnected, and the first plug-in portion 112 floats relative to the shell 111 in a direction perpendicular to the plug-in direction under the cooperation of the first guide body 21 and the second plug-in portion 121 and is plugged in with the second plug-in portion 121.

[0101] In some embodiments, the electrode terminals of the battery cells are connected through a busbar or the like to form a power supply circuit, and the connector 1 can be electrically connected to the power supply circuit to form an electrical circuit. Of course, the electrical circuit can also include other components and can also include powered electrical appliances. The connector 1 can be directly connected to the power supply circuit and electrically connected to the battery cell assembly; the connector 1 can also be indirectly connected to the power supply circuit and electrically connected to the battery cell assembly. For example, the connector 1 can be connected to the power supply circuit through a low-voltage circuit to form an electrical circuit, and the connector 1 controls the on-off of the electrical circuit by controlling the on-off of the low-voltage circuit.

[0102] In some embodiments, the connector 1 can control the on / off of the electrical circuit by connecting or disconnecting the first connection terminal 11 and the second connection terminal 12. In other embodiments, the connector 1 can be combined with another connector (eg, interconnected contact terminals) to form a connector with an interlocking function.

[0103] The electrical circuit may be a high voltage circuit or a low voltage circuit. In some embodiments, an electrical circuit with a voltage higher than 36V may be referred to as a high voltage circuit. In other embodiments, an electrical circuit with a voltage higher than 200V may be referred to as a high voltage circuit.

[0104] The on-off of the electrical circuit includes the conduction of the electrical circuit and the disconnection of the electrical circuit. The electrical circuit can be turned on and off by turning on and off the connector 1 itself; the conduction and disconnection of the electrical circuit can also be achieved by controlling other electrical components or mechanical structures through the connector 1. Optionally, the first connection terminal 11 and the second connection terminal 12 of the connector 1 can be connected to the high-voltage circuit of the battery device 100, and the conduction and disconnection of the high-voltage electrical circuit can be directly controlled by turning on and off the two connection terminals. Optionally, the first connection terminal 11 and the second connection terminal 12 can be used as the low-voltage connection terminal of the connector 1. Of course, the connector 1 can also include a high-voltage connection terminal connected to the high-voltage electrical circuit. The power on or off of the low-voltage connection terminal can be directly or through other control circuits to control the power on or off of the high-voltage connection terminal, thereby controlling the conduction and disconnection of the high-voltage electrical circuit. In a specific example, the low-voltage circuit and the high-voltage circuit (such as the power supply circuit) can be coupled by a relay, and the electrical circuit, especially the high-voltage circuit, can be controlled by controlling the on and off of the relay by the connector 1.

[0105] The connection method between the connector 1 and the electrical circuit can adopt an existing connection method, and the embodiment of the present application has no special limitation on this.

[0106] The first connection end 11 and the second connection end 12 can be connected by plugging, and can be disconnected by pulling. Exemplarily, the first connection end 11 and the second connection end 12 can be a plug and a socket respectively.

[0107] In some embodiments, Figure 5 , Figures 8 to 10 As shown, the first connection end 11 has a housing 111 , a first plug-in portion 112 mounted on the housing 111 , a plurality of spring members 113 connecting the housing 111 and the first plug-in portion 112 , and a first guide body 21 connected to the first plug-in portion 112 .

[0108] Optionally, the housing 111 may be formed by a plurality of housing walls. Of course, the housing 111 may also be formed by two housings with openings that are covered and snap-fitted. The spring member 113 and at least part of the first plug-in portion 112 may be located in the accommodation space in the housing 111. The housing 111 may be in the shape of a cuboid, a cylinder, a multi-prism (e.g., a hexagonal prism) or other irregular shapes. The housing may also be in the shape of a flat plate. The spring member 113 may be connected to the housing through a connecting column. Of course, the housing 111 may also be in other structures. Figures 3 to 12 In the illustrated embodiment, for ease of description, the shell 111 is taken as an example in the shape of a rectangular parallelepiped.

[0109] Optionally, the housing 111 may be made of an insulating material or a metal material with an insulating layer on the surface.

[0110] Optionally, the first plug-in portion 112 may be made of insulating material, wherein the first plug-in portion 112 has a structure capable of being electrically connected to the second plug-in portion 121 .

[0111] like Figures 9 to 12 As shown, the spring member 113 may be a spring, such as a coil spring. One end of the spring member 113 is used to connect to the housing 111, which may be directly connected or indirectly connected; the other end of the spring member 113 is used to connect to the first plug-in portion 112, which may be directly connected or indirectly connected. Direct connection may be achieved by bonding or welding, etc., and indirect connection may be achieved by connecting a connecting column or a bolt, etc.

[0112] Optional, such as Figures 9 to 12 As shown, the spring member 113 may be multiple, for example, two, three, four or five, etc. The spring member 113 may connect the shell 111 and the first plug-in portion 112 along the first direction X, or may connect the shell 111 and the first plug-in portion 112 along a direction perpendicular to the first direction X. For example, the shell 111 and the first plug-in portion 112 may be connected along the second direction Y or the third direction Z, or in other directions within a plane including the second direction Y and the third direction Z.

[0113] Optionally, the first guide body 21 and the first plug-in portion 112 may be directly connected or indirectly connected. Furthermore, the first guide body 21 and the first plug-in portion 112 are fixedly connected, and the relative positions of the first guide body 21 and the first plug-in portion 112 are fixed.

[0114] In the present application, the first direction X is the plugging direction of the first plugging portion 112 and the second plugging portion 121, and the first direction X, the second direction Y and the third direction Z intersect each other. The first guide body 21 is connected to the first plugging portion 112 and extends from the connection position along the first direction X toward a side close to the second plugging portion 121 (for example, Figure 4 The first guide body 21 may be connected to a substantially middle position of the first plug-in portion 112. It should be noted that as long as the first guide body 21 can guide the first plug-in portion 112 to float and align with the second plug-in portion 121, there is no particular limitation on the connection position of the first guide body 21 and the first plug-in portion 112.

[0115] Optionally, the first guide body 21 may be made of metal, plastic or other materials. The first guide body 21 will be described in detail later.

[0116] In some embodiments, Figure 3 , Figure 6 and Figure 7 As shown, the second connection end 12 has a second plug-in portion 121, and the second plug-in portion 121 can be connected to the first plug-in portion 112 (see Fig. 9) plug in or disconnect. When the first plug-in portion 112 is plugged in with the second plug-in portion 121, the electrical circuit can be electrically connected; when the first plug-in portion 112 is disconnected from the second plug-in portion 121, the electrical circuit can be powered off.

[0117] In some embodiments, Figure 5 and Figure 6 As shown, under the cooperation of the first guide body 21 and the second plug-in portion 121, the first plug-in portion 112 floats relative to the housing 111 in a direction perpendicular to the first direction X (the second direction Y, the third direction Z, or other directions in the plane formed by the second direction Y and the third direction Z) and plugs into the second plug-in portion 121. Of course, the first plug-in portion 112 can also float relative to the housing 111 in the first direction X.

[0118] Therefore, with the cooperation of the first guide body 21 and the second plug-in portion 121, the first plug-in portion 112 floats relative to the shell 111 in a direction perpendicular to the plug-in direction, so that the first plug-in portion 112 and the second plug-in portion 121 are quickly aligned, so that the first plug-in portion 112 and the second plug-in portion 121 can be plugged in smoothly, and the assembly error of the connector 1 can be absorbed, thereby improving the connection reliability of the connector 1 and further improving the use reliability of the battery device 100.

[0119] In some embodiments, Figures 8 to 10 As shown, the first plug-in portion 112 includes a plug-in body 1121 and a plug-in extension body 1122. The plug-in body 1121 is located in the shell 111 and is connected to the shell 111 through a spring member 113; the plug-in extension body 1122 is connected to the plug-in body 1121 and passes through the first shell wall 1113 of the shell 111 along the plug-in direction (first direction X) and extends out of the shell 111. The plug-in extension body 1122 can be plugged with the second plug-in portion 121 under guidance.

[0120] The first plug-in portion 112 includes a plug-in body 1121 and a plug-in extension body 1122 connected to each other. The plug-in body 1121 may be plate-shaped. When the plug-in body 1121 is observed along the first direction X, the plug-in body 1121 may be rectangular, circular, triangular or other irregular shapes. Fig.12 A rectangular shape is shown; the plug-in extension body 1122 extends along the first direction X, and the plug-in extension body 1122 can be a cylinder, a cuboid, or a polygonal prism (eg, a hexagonal prism), etc.

[0121] Optionally, the connection position between the plug extension body 1122 and the plug body 1121 may be located substantially in the middle of one side of the plug body 1121 , or may be located toward one side of one side of the plug body 1121 .

[0122] like Fig. 9 and Fig.10As shown, the plug-in body 1121 is located in the housing 111, and part of the plug-in extension body 1122 is located in the housing 111. One end of the plug-in extension body 1122 along the first direction X (for example Fig. 9 The upper end or Fig.10 The left end shown in the figure) is connected to the plug-in body 1121, and the other end of the plug-in extension body 1122 along the first direction X (for example Fig. 9 The lower end or Fig.10 The right end as shown in the figure passes through an opening of a shell wall of the shell 111 and is located outside the shell 111. For the convenience of description, the shell wall through which the plug-in extension body 1122 passes is named "first shell wall 1113", and an opening on the first shell wall 1113 is named "first opening 1111", wherein the first shell wall 1113 is perpendicular to the first direction X.

[0123] Here, the first opening 1111 may be a through hole opened on the first shell wall 1113 of the shell 111 , or may be an opening formed by not providing the first shell wall 1113 .

[0124] Under the guidance of the first guide body 21 and the second plug-in portion 121 , the plug-in extension body 1122 is plugged into the second plug-in portion 121 . In addition, the plug-in extension body 1122 has an electrical connection end that can be electrically connected to the electrical connection end of the second plug-in portion 121 .

[0125] Since the first plug-in portion 112 includes a plug-in body 1121 and a plug-in extension 1122, and the plug-in body 1121 is connected to the housing through a spring member 113, the first plug-in portion is easier to connect to the housing and can float. Since the plug-in extension penetrates the first housing wall of the housing along the first direction and extends out of the housing, and the plug-in extension 1122 is connected to the plug-in body 1121, the plug-in extension 1122 can be driven to float, so that the first plug-in portion 112 and the second plug-in portion 121 are easier to align and plug, and this structure is simple in design and easy to manufacture.

[0126] Furthermore, the plug body 1121 is configured in a plate shape, which can limit the relative position of the first plug portion 112 and the housing 111 , so that the first plug portion 112 is not easily flipped relative to the housing 111 under the action of the spring member 113 .

[0127] In some embodiments, Fig. 9 and Fig.10 As shown, the first guide body 21 is disposed around the plug extension body 1122, and the first guide body 21 is away from the plug body 1121 along the plug direction (first direction X) (for example Fig. 9 The lower part shown or Fig.10The right part shown in the figure is provided with a guide surface 211. During the process of the first plug-in portion 112 and the second plug-in portion 121 being plugged in, the second plug-in portion 121 contacts the guide surface 211.

[0128] In some embodiments, the first guide body 21 is formed into a cylindrical shape. Of course, the first guide body 21 can also be formed into a square cylinder or other shapes. The plug-in extension body 1122 is located in the cylindrical first guide body 21 (i.e., the hollow part), and the plug-in extension body 1122 is fixedly connected to the first guide body 21, but there is a gap between the outer circumferential surface of the plug-in extension body 1122 perpendicular to the first direction X and the inner circumferential surface of the first guide body 21 perpendicular to the first direction X. The gap can allow a part of the second plug-in portion 121 (for example, part or all of the plug-in sleeve 1211 described later) to be inserted. During the process of plugging the plug-in extension body 1122 into the second plug-in portion 121, the guide surface 211 of the first guide body 21 can contact the outer surface of the second plug-in portion 121, and under the guidance of the guide surface 211 and the second plug-in portion 121, the plug-in extension body 1122 and the second plug-in portion 121 can be roughly aligned, for example, the plug-in extension body 1122 can be inserted into the second plug-in portion 121, so that the electrical connection part in the plug-in extension body 1122 can be electrically connected to the electrical connection part in the second plug-in portion 121, thereby forming an electrical circuit.

[0129] During the plugging process, the second plug-in portion 121 contacts the guide surface 211, thereby guiding the first plug-in portion 112 to float in a direction perpendicular to the plug-in direction, so that the first plug-in portion 112 and the second plug-in portion 121 are quickly aligned, so that the first plug-in portion and the second plug-in portion are plugged smoothly, thereby absorbing the assembly error of the connector 1, improving the connection reliability of the connector, and further improving the use reliability of the battery device.

[0130] In some embodiments, Figure 5 and Figures 8 to 10 As shown, a first opening 1111 is provided in the first housing wall 1113 , and the first guide body 21 and the plug-in extension body 1122 penetrate the first housing wall 1113 via the first opening 1111 . There is a gap between the inner periphery of the first opening 1111 and the first guide body 21 .

[0131] Optionally, when observing along the first direction X, Figure 8 As shown, the first opening 1111 may be rectangular, circular, triangular or other irregular shapes.

[0132] like Figure 8As shown, the inner periphery of the first opening 1111 is larger than the outer contour of the first guide body 21 near the first opening 1111 when viewed along the first direction X. That is, the first opening 1111 is formed to allow the first guide body 21 to float in the first opening 111 along a direction perpendicular to the first direction X.

[0133] Optionally, along a direction perpendicular to the first direction X, the distance between the inner periphery of the first opening 1111 and the outer contour of the plug-in extension body 1122 may be the same in all directions or may be different.

[0134] Thus, the first guide body and the plug-in extension body can be allowed to float in a direction intersecting the plug-in direction with a simple structure, so that the first plug-in portion and the second plug-in portion can be plugged in smoothly.

[0135] In some embodiments, Fig. 9 , Fig.10 and Fig.12 As shown, the spring member 113 includes a plurality of first spring members 1131, and the plurality of first spring members 1131 are respectively connected to the housing 111 and the first plug-in portion 112 along a direction intersecting the plug-in direction (first direction X), and at least two of the first spring members 113 are arranged opposite to each other across the first plug-in portion. The first direction X is the plug-in direction of the first plug-in portion 112 and the second plug-in portion 121.

[0136] like Fig.12 As shown, the first spring members 1131 may be two, three, four or five, etc. The first spring members 1131 may be distributed at intervals along a direction perpendicular to the first direction X and connect the first plug-in portion 112 and the housing 111. Further, the first spring members 1131 may be evenly distributed (distributed at equal angles) along a circumferential direction perpendicular to the first direction X and respectively connect one end of the first plug-in portion 112 and the housing 111.

[0137] The projection of the first plug-in portion 112 along the first direction X is a rectangle for specific description. In some specific embodiments, such as Fig.12 As shown, when there are two first spring members 1131, one of the first spring members 1131 can be connected to an end portion of the first plug-in portion 112 along the second direction Y (for example Fig.12 The left end portion shown in FIG. 110 and the housing 111, another first spring member 1131 can connect the other end portion of the first plug-in portion 112 along the second direction Y (eg, Fig.12 Of course, the first spring member 1131 can also be connected to an end of the first plug-in portion 112 along the third direction Z (for example Fig.12 Of course, the first spring member 1131 can also be connected to a corner of the first plug-in portion 112 (for example Fig.12 The upper left corner, upper right corner, lower left corner or lower right corner as shown) and the shell 111.

[0138] In a specific embodiment, Fig.12 As shown, there are four first spring members 1131. When observing the first plug-in portion 112 along the first direction X, the first spring members 1131 are respectively connected to the four corners of the first plug-in portion 112 (for example Fig.12 The upper left corner, upper right corner, lower left corner and lower right corner shown) and the shell 111.

[0139] like Fig. 9 , Fig.10 and Fig.12 As shown, the first spring member 1131 can be directly connected to the housing 111 or indirectly connected. The first spring member 1131 can be directly connected to the first plug-in portion 112 or indirectly connected. The direct connection can be achieved by bonding or welding, etc., and the indirect connection can be achieved by connecting columns or bolts. In a specific embodiment, the first spring member 1131 is connected to the housing 111 through a connecting column, and the first spring member 1131 is directly connected to the first plug-in portion 112.

[0140] Thus, the first plug-in portion can be stably floated in a direction intersecting the plug-in direction, thereby improving the connector's ability to absorb assembly errors in the direction intersecting the plug-in direction. In addition, a suitable spring, number of springs, and configuration position can be selected according to the spring coefficient, assembly error range, size of the first plug-in portion, etc.

[0141] In some embodiments, an even number of first spring members 1131 are provided, and the even number of first spring members 1131 are distributed around the first plug-in portion 112 in a symmetrical manner about the axis.

[0142] Optionally, the number of the first spring members 1131 may be two, four, six, etc. When viewed along the first direction, an even number of the first spring members 1131 are symmetrically distributed on two or more sides of the first plug-in portion 112 .

[0143] As a result, the first plug-in portion can be subjected to balanced force and can float in a stable state, which is beneficial to improving the ability of the connector to absorb assembly errors in a direction intersecting the plug-in direction.

[0144] In some embodiments, four first spring members 1131 are provided, and the four first spring members 1131 are connected to the plug-in body 1121 at equal angles.

[0145] In a specific embodiment, Fig.12As shown, the plug body 1121 is formed into a substantially square plate shape, and there are four first spring members 1131, which are respectively connected to the four corners of the plug body 1121. When viewed along the first direction X, the angle between adjacent first spring members 1131 is approximately 90°. Optionally, the plug body 1121 can also be formed into a circular plate shape.

[0146] As a result, the first plug-in portion can be subjected to balanced force and can float in a stable state, which is beneficial to improving the ability of the connector to absorb assembly errors in a direction intersecting the plug-in direction.

[0147] In some embodiments, Fig. 9 and Fig.10 As shown, the spring member 113 further includes a second spring member 1132 , and the second spring member 1132 connects the housing 111 and the first plug-in portion 112 along the plug-in direction.

[0148] like Fig. 9 and Fig.10 As shown, along the first direction X, one end of the second spring member 1132 is connected to the inner surface of the housing 111 , and the other end of the second spring member 1132 is connected to an end of the first plug portion 112 along the first direction X, for example, connected to the plug body 1121 .

[0149] The second spring member 1132 can be directly connected to the housing 111 or indirectly connected. The second spring member 1132 can be directly connected to the first plug-in portion 112 or indirectly connected. The direct connection can be achieved by bonding or welding, and the indirect connection can be achieved by connecting columns or bolts. In a specific embodiment, the second spring member 1132 is directly connected to the housing 111, and the second spring member 1132 is directly connected to the first plug-in portion 112.

[0150] Thereby, the first plug-in portion 112 can float along the first direction X, so that the first plug-in portion 112 can maintain a good connection state with the second plug-in portion 121 under the action of the second spring member 1132, has good electrical connection reliability, and can also absorb assembly errors along the plug-in direction, thereby further improving the ability of the connector 1 to absorb assembly errors in the first direction X.

[0151] In some embodiments, Figure 5 and Figures 9 to 11 As shown, the first guide body 21 includes a first guide section 212 and a second guide section 213 connected along the plug-in direction. One end of the first guide section 212 is connected to the plug-in body 1121, and the other end is connected to the second guide section 213. The second guide section 213 is formed so that the farther away from the first guide section 212, the larger the inner diameter. The inner circumferential surface of the second guide section 213 provides a guiding surface. Along the plug-in direction, the plug-in extension body 1122 does not exceed the first guide section.

[0152] like Figure 5 , Figures 9 to 11 As shown, the first guide body 21 includes a first guide segment 212 and a second guide segment 213 connected to each other. One end of the first guide segment 212 along the first direction X (eg Fig. 9 Shown above or Fig.10 The left end shown in the figure) is connected to the plug-in body 1121, and the other end of the second guide section 213 along the first direction X (for example Fig. 9 The lower end or Fig.10 The right end of the first guide section 212 as shown in the figure is connected to the second guide section 213, and one end of the first guide section 212 away from the plug-in body 1121 along the first direction X is located outside the housing 111.

[0153] The second guide section 213 is formed such that the inner diameter of the second guide section 213 increases as it is further away from the first guide section 212. The inner peripheral surface of the second guide section 213 is the guide surface 211. Figure 5 , Figures 9 to 11 In the illustrated embodiment, the second guide section 213 is formed in a truncated cone shape, wherein the angle formed by the second guide section 213 and the first guide section 212 (the angle formed by the outer peripheral surface) can be set in a range of more than 120 degrees and less than 180 degrees. In addition, the outer peripheral surface of the second guide section 213 may not be formed in a conical shape, as long as the guide surface 211 is formed in a conical shape; other structures may also be provided on the outer peripheral surface of the second guide section 213, such as reinforcing ribs, etc.

[0154] In some embodiments, Fig. 9 and Fig.10 As shown, along the first direction X, the plug extension body 1122 does not exceed the first guide section 212, that is, the end of the plug extension body 1122 away from the plug body 1121 along the first direction X (for example Fig. 9 The lower end or Fig.10 The right end shown in FIG. 1 does not exceed the end of the first guide section 212 away from the plug-in body 1121 along the first direction X (for example Fig. 9 The lower end or Fig.10 The end of the extension body 1122 that is away from the plug-in body 1121 along the first direction X (for example, the right end shown) can be plugged in. Fig. 9 The lower end or Fig.10 The right end shown in FIG. 1 is larger than the end of the first guide section 212 that is farther away from the plug-in body 1121 along the first direction X (eg Fig. 9 The lower end or Fig.10 The right end shown in the figure is closer to the plug-in body 1121, and the end of the extension body 1122 along the first direction X away from the plug-in body 1121 (for example Fig. 9 The lower end or Fig.10The right end shown in FIG. 1 is connected to an end of the first guide section 212 away from the plug-in body 1121 along the first direction X (eg Fig. 9 The lower end or Fig.10 The right end as shown in the figure) is equal or substantially equal to the distance from the plug-in body 1121.

[0155] Since the second guide section 213 is formed so that the further away from the first guide section 212, the larger the inner diameter, it is beneficial for the guide surface 211 of the first guide body to contact the second plug-in portion 121 during plugging, so that the first plug-in portion 112 and the second plug-in portion 121 can be plugged smoothly, thereby absorbing the assembly error within a large range of the connector and improving the reliability of the battery device. In addition, the arrangement of the plug-in extension body 1122 not exceeding the first guide section 212 can make the plug-in extension body 1122 roughly aligned with the second plug-in portion 121 under the guidance of the second guide section 213, and then plugged with the second plug-in portion 121, so that the plug-in extension body 1122 can be quickly aligned with the second plug-in portion 121, reducing the risk of damage to the plug-in extension body 1122 due to misaligned plugging.

[0156] In some embodiments, the second connection end 12 further has a second guide body 22 , and the first plug-in portion 112 floats relative to the housing 111 and is plugged with the second plug-in portion 121 under the cooperation of the first guide body 21 and the second guide body 22 .

[0157] In some embodiments, the first guide body 21 can be a plug-in sleeve, and the second guide body 22 can be arranged around the second plug-in portion 121. During the plug-in process of the first plug-in portion 112 and the second plug-in portion 121, the first guide body 21 and the second guide body 22 are in contact, so that the first plug-in portion 112 floats relative to the shell 111 in a direction perpendicular to the plug-in direction (first direction X), so that the first plug-in portion 112 and the second plug-in portion 121 can be quickly aligned and plugged.

[0158] Therefore, with the cooperation of the first guide body 21 and the second guide body 22, the first plug-in portion 112 floats relative to the shell 111 in a direction perpendicular to the plug-in direction (the first direction X), so that the first plug-in portion 112 and the second plug-in portion 121 are quickly aligned, so that the first plug-in portion 112 and the second plug-in portion 121 can be plugged in smoothly, and the assembly error of the connector 1 can be absorbed, thereby improving the connection reliability of the connector 1, and further improving the use reliability of the battery device 100.

[0159] In some embodiments, Figure 6 As shown, the second plug-in portion 121 has a plug-in sleeve 1211 extending along the plug-in direction. Figure 5 and Figure 6As shown, the plug extension body 1122 floats relative to the housing 111 in a direction perpendicular to the plugging direction under the cooperation of the first guide body 21 and the plug sleeve 1211 , and the plug extension body extends into the plug sleeve 1211 .

[0160] Therefore, the alignment of the plug-in extension body 1122 and the hollow portion of the plug-in sleeve 1211 can be achieved through the cooperation between the first guide body 21 and the plug-in sleeve 1211, so that the plug-in can be achieved quickly and accurately.

[0161] In some embodiments, Figure 6 As shown, the second connecting end 12 also has a second guide body 22, which protrudes from the outer peripheral surface of the plug-in sleeve 1211, and the second guide body 22 is formed so that the farther away from the first plug-in portion 112, the higher the height of the protrusion from the outer peripheral surface. When the first plug-in portion 112 and the second plug-in portion 121 are plugged in, the guide surface 211 is in contact with the second guide body 22.

[0162] Optionally, the second guide body 22 may be made of metal, plastic or other materials.

[0163] like Figure 6 As shown, the second plug-in portion 121 has a plug-in sleeve 1211 extending along the first direction X, and the outer circumference of the plug-in sleeve 1211 may have a protruding structure, and the protruding structure may be arranged on the outer circumference of the plug-in sleeve 1211 at intervals, or the protruding structure may be a continuous structure surrounding the outer circumference of the plug-in sleeve 1211. The protruding structure is the second guide body 22. The protruding structure may be a structural member formed integrally with the plug-in sleeve 1211, or may be formed separately and then connected together by bonding, welding, welding or other connection methods.

[0164] exist Figure 6 In the embodiment shown, the second guide body 22 is formed as a rib-shaped protruding structure, and the farther away from the first plug-in portion 112 (for example, along the first direction X and away from the first plug-in portion 112, for example Figure 6 The higher the protruding height is, the larger the radial dimension (the contour in the direction perpendicular to the plug-in direction) of the second guide body 22 is.

[0165] When the first insertion portion 112 is inserted into the second insertion portion 121, the guide surface 211 is in contact with the second guide body 22. For example, the contact may be surface contact.

[0166] In this way, under the guidance of the first guide body 21 and the second guide body 22, the first plug-in portion 112 and the second plug-in portion 121 can be further aligned. Moreover, since the guide surface 211 is in contact with the second guide body 22 in the plugged state, the possibility of relative shaking between the first plug-in portion 112 and the second plug-in portion 121 is reduced, which is beneficial to maintaining the plug-in stability and further improving the connection reliability of the connector.

[0167] In some embodiments, the plug sleeve is formed into a hollow shape, and when the first plug portion 112 is plugged with the second plug portion 121 , the plug extension body 1122 extends into the plug sleeve 1211 .

[0168] In some embodiments, Figure 7 and Figure 8 As shown, the first plug-in portion 112 has a first contact electrode 1123, and the first contact electrode 1123 is at least partially exposed at the end of the first plug-in portion 112 facing the second plug-in portion 121; the second plug-in portion 121 has a second contact electrode 1124, and the second contact electrode 1124 is at least partially exposed at a position of the second plug-in portion 121 facing the first plug-in portion 112, the first plug-in portion 112 is plug-connected with the second plug-in portion 121, and the first contact electrode 1123 and the second contact electrode 1124 are in contact with each other.

[0169] Optionally, the first plug-in portion 112 is made of insulating material, such as insulating rubber or insulating resin.

[0170] In some embodiments, the first plug-in portion 112 has a conductive wire inside, and the two ends of the conductive wire are connected to, for example, two first contact electrodes 1123 (a positive first contact electrode and a negative first contact electrode), and the first contact electrode 1123 is located at one end of the first plug-in portion 112 along the first direction X (for example Fig. 9 Further, the first contact electrode 1123 may be located at an end of the plug extension body 1122 along the first direction X (eg Fig. 9 As shown in the lower end portion, the first contact electrode 1123 includes a positive first contact electrode and a negative first contact electrode.

[0171] In some embodiments, the second plug-in portion 121 has a second contact electrode 1124 at a position along the first direction X. Furthermore, the second plug-in portion 121 has a hollow plug-in sleeve 1211, and the second contact electrode 1124 is located in the plug-in sleeve. The second contact electrode 1124 includes a positive second contact electrode and a negative second contact electrode.

[0172] The second plug-in portion 121 is plug-connected with the first plug-in portion 112 , the plug-in extension body 1122 extends into the plug-in sleeve 1211 , the positive first contact electrode is electrically connected to the positive second contact electrode, and the negative first contact electrode is electrically connected to the negative second contact electrode.

[0173] Thus, the first plug-in portion and the second plug-in portion can be electrically connected by contacting each other, so that the on and off of the electrical circuit can be easily controlled.

[0174] In some embodiments, Figure 3 and Figure 4 As shown, the connector also includes at least two contact terminals 13, each contact terminal 13 includes a first contact 131 and a second contact 132, the first contact 131 and the second contact 132 can be connected or separated, and each contact terminal 13 is used to access the electrical circuit. When the first contact 131 and the second contact 132 are connected and the first plug-in portion 112 and the second plug-in portion 121 are plugged in, the electrical circuit can be connected; when the first contact 131 and the second contact 132 are separated and / or the first plug-in portion 112 and the second plug-in portion 121 are separated, the electrical circuit is disconnected.

[0175] In some embodiments, the connector may include two, three or four contact terminals 13 .

[0176] In some embodiments, each contact terminal 13 includes a first contact 131 and a second contact 132 that can be connected or separated. The connection between the first contact 131 and the second contact 132 can be an electrical connection. Further, the connection between the first contact 131 and the second contact 132 can be a high-voltage electrical connection.

[0177] In a specific embodiment, Figure 3 and Figure 4 As shown, the first contact 131 and the second contact 132 are arranged in the form of a plug and a socket.

[0178] In some embodiments, Figure 3 and Figure 4 As shown, the connector 1 further includes a connector cover 14 and a connector base 15 , the first contact 131 is disposed on the connector cover 14 , the second contact 132 and the second connection end 12 are disposed on the connector base 15 , and the first connection end 11 is separately disposed relative to the connector cover 14 .

[0179] In some embodiments, when the first contact 131 is connected to the second contact 132 and the first plug-in portion 112 is plugged into the second plug-in portion 121, the electrical circuit can be connected; when the first contact 131 is separated from the second contact 132 and the first plug-in portion 112 is separated from the second plug-in portion 121, the electrical circuit is disconnected; when the first contact 131 is separated from the second contact 132 and the first plug-in portion 112 is plugged into the second plug-in portion 121, the electrical circuit is disconnected; when the first contact 131 is connected to the second contact 132 and the first plug-in portion 112 is separated from the second plug-in portion 121, the electrical circuit is disconnected.

[0180] In some specific embodiments, the contact terminal 13 is a high-voltage connection end, the first plug-in portion 111 and the second plug-in portion 121 are low-voltage connection ends, the high-voltage circuit portion and the low-voltage circuit portion can be coupled by a relay to form an electrical circuit, and the plugging and unplugging of the first plug-in portion 111 and the second plug-in portion 121 can control the on and off of the relay; in addition, the low-voltage connection end can also be connected to the battery management system (BMS: Battery Management System) of the battery device. When the first plug-in portion 111 and the second plug-in portion 121 are electrically connected due to contact, the relay can be turned on to connect the high-voltage circuit portion, and in addition, a signal that the high-voltage electrical circuit can be connected can also be sent to the battery management system, or when the first plug-in portion 111 and the second plug-in portion 121 are disconnected due to non-contact, the relay can be turned off to disconnect the high-voltage circuit portion, and a signal that the high-voltage electrical circuit is cut off can also be sent to the battery management system.

[0181] Thereby, an electrical connector with an interlocking function can be formed, thereby further improving the protective effect of the connector.

[0182] In some embodiments, Figure 2 and Fig.13 As shown, the battery device 100 further includes: a cover 106 connected to the box 101 and enclosing the accommodating cavity S, and the first connecting end 11 is connected to the cover 106 .

[0183] In some embodiments, Figure 2 As shown, the accommodating chamber S has an opening 103 , and a cover 106 is used to close the opening 103 .

[0184] In some embodiments, the specific shape of the opening 103 is not limited, and the cover 106 can close the opening 103. The opening 103 can expose the first accommodating cavity S1 and the second accommodating cavity S2, or the opening 103 can only expose at least a portion of the second accommodating cavity S2. In a specific embodiment, the opening 103 is a maintenance port, the cover 106 is a maintenance port cover, and the cover 106 is sealed and connected to the box body 101. Further, the cover 106 is sealed and connected to the box body 101 through a sealing member.

[0185] In some specific embodiments, Figure 2 As shown, the battery cells are concentrated in a certain space (e.g. Fig.13 In the first accommodating cavity S1 shown in the figure), when the cover and the box body are in a closed state, the connector 1 is located in a space in the box body 101 away from the location of the battery monomer, and the opening 103 makes the second accommodating cavity S2 open to the outside.

[0186] In some embodiments, the first connection end 11 and the cover body can be directly connected or indirectly connected. The first connection end 11 and the cover body can be fixedly connected by bolts, rivets or glue. Fig.12 As shown, a mounting flange 1114 is provided on the outer surface of the housing 111 of the first connection end 11, and the first connection end 11 is connected to the cover body through the mounting flange 1114, and the mounting flange 1114 and the cover body are connected by bolts. In a specific embodiment, there are two mounting flanges 1114, and they are arranged on both sides of the outer surface of the housing 111 along the second direction Y or the third direction Z. Of course, the mounting flange 1114 can also be one, three, four or more. In some embodiments, the second connection end 12 can be directly connected to the box body 101, or indirectly connected.

[0187] Thus, as the cover is separated from the box, the connection between the first connection end and the second connection end is disconnected, so that once the cover is opened, the connector cuts off the electrical circuit in the battery device, reducing the risk of electric shock after the cover is opened.

[0188] In some embodiments, the accommodating chamber S includes a first accommodating chamber S1 and a second accommodating chamber S2 , the battery cell is accommodated in the first accommodating chamber S1 , a connector is accommodated in the second accommodating chamber S2 , and the first accommodating chamber S1 and the second accommodating chamber S2 share a cover.

[0189] In some embodiments, the cover is used to close the first accommodating cavity S1 and the second accommodating cavity S2.

[0190] In some embodiments, the first accommodation cavity S1 and the second accommodation cavity S2 may be arranged along the second direction Y or the third direction Z. Thus, as long as the cover is opened, the connector cuts off the electrical circuit in the battery device, reducing the risk of electric shock after the cover is opened.

[0191] In some embodiments, the accommodating cavity S includes a first accommodating cavity S1 and a second accommodating cavity S2, the battery cell assembly is accommodated in the first accommodating cavity S1, the connector 1 is accommodated in the second accommodating cavity S2, the cover body 106 includes a first cover body 102 and a second cover body 105, the first cover body 102 closes the first accommodating cavity S1, the second cover body 105 closes the second accommodating cavity S2, and the first connecting end 11 is connected to the second cover body 105.

[0192] Thus, the second accommodating cavity can be opened independently of the first accommodating cavity accommodating the battery cell, and once the second cover body closing the second accommodating cavity is opened, the connection between the first connection end and the second connection end is disconnected, so that the second accommodating cavity can be operated in the power-off state.

[0193] In some embodiments, the opening 103 of the second receiving chamber S2 is configured as a maintenance port for the battery device 100 .

[0194] This enables maintenance to be carried out in a power-off state.

[0195] A second aspect of the present application provides an electrical device, which includes the battery device 100 of the first aspect of the present application, and the battery device is used to store or provide electrical energy.

[0196] Since the reliability of the battery device is improved, the reliability of the power-consuming device is also improved; moreover, the electrical circuit between the power-consuming device and the battery device can be operated in a power-off state, thereby reducing the risk of electric shock.

[0197] In some embodiments, the electric device comprises an electric vehicle.

[0198] This can improve the reliability of the electric vehicle, and the battery device in the electric vehicle can be replaced, repaired, etc. in a power-off state, reducing the risk of electric shock.

[0199] In some embodiments, the connector 1 also includes at least two contact terminals 13, each contact terminal 13 includes a first contact 131 and a second contact 132, the first contact 131 and the second contact 132 can be connected or separated, the first contact 131 is connected to the electrical appliance of the electric vehicle, and the second contact 132 is connected to the power supply circuit, when the first contact 131 and the second contact 132 are connected and the first plug-in portion 112 and the second plug-in portion 121 are plugged in, the electrical circuit can be connected so that the battery device 100 can provide electrical energy; when the first contact 131 and the second contact 132 are separated and / or the first plug-in portion 112 and the second plug-in portion 121 are separated, the electrical circuit is disconnected so that the battery device 100 does not provide electrical energy.

[0200] Therefore, when the first connection end is disconnected from the second connection end to cut off the power supply of the electrical circuit between the electric vehicle and the battery device, the first contact and the second contact can be manually operated, which can be operated quickly and accurately while reducing the risk of electric shock.

[0201] The third aspect of the present application provides a connector 1, which is used to control the on and off of an electrical circuit. The connector 1 includes a first connection end 11 and a second connection end 12. The first connection end 11 has a shell 111, a first plug-in portion 112 installed on the shell 111, a plurality of spring members 113 connecting the shell 111 and the first plug-in portion 112, and a first guide body 21 connected to the first plug-in portion 112; the second connection end 12 has a second plug-in portion 121, and the second plug-in portion 121 can be plugged in or separated from the first plug-in portion 112 so as to be electrically connected or disconnected. With the cooperation of the first guide body 21 and the second plug-in portion 121, the first plug-in portion 112 floats relative to the shell 111 in a direction perpendicular to the plug-in direction and is plugged in with the second plug-in portion 121.

[0202] Therefore, with the cooperation between the first guide body 21 and the second plug-in portion, the first plug-in portion 112 floats relative to the shell 111 in a direction perpendicular to the plug-in direction, so that the first plug-in portion 112 and the second plug-in portion 121 are quickly aligned, so that the first plug-in portion 112 and the second plug-in portion 121 can be smoothly plugged in, and the assembly error of the connector 1 can be absorbed, thereby improving the connection reliability of the connector 1, and further improving the reliability of the battery device 100.

[0203] In a specific embodiment, Figures 3 to 12 As shown, the first connection end 11 is connected to the second connection end 12 to achieve power connection, and the plug extension 1122 on the first plug part 112 is connected to the second plug part 121 to achieve interlocking electrical conduction.

[0204] The plug-in body 1121 is connected to the shell body 111 through the second spring member 1132 and the first spring member 1131. The first plug-in part 112 has a first guide body 21. When the first plug-in part 112 is matched with the second plug-in part 121, the plug-in sleeve 1211 of the second plug-in part 121 is first inserted into the frame guide of the first guide body 21 (the hollow cavity of the first guide body 21), thereby driving the spring member 113 to float to the middle position, so that the first connection end 11 and the second connection end 12 can be smoothly matched with each other.

[0205] The above is used to illustrate the technical solution of the present application, rather than to limit it; although the present application is described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that: it is still possible to modify the technical solutions recorded in the aforementioned embodiments, or to replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the present application. In particular, if there is no special description, all embodiments and optional embodiments of the present application can be combined with each other to form a new technical solution. If there is no special description, all technical features and optional technical features of the present application can be combined with each other to form a new technical solution. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the present application.

Claims

1. A battery device, characterized in that: include: A box body having a containing cavity; At least one battery cell assembly is accommodated in the accommodation cavity; A connector, at least partially located in the accommodating cavity and electrically connected to the battery cell assembly to form an electrical circuit, wherein the connector is used to control the on / off of the electrical circuit. The connector includes a first connection end and a second connection end, The first connecting end comprises a housing, a first plug-in portion mounted on the housing, a plurality of spring members connecting the housing and the first plug-in portion, and a first guide body connected to the first plug-in portion; The second connection end has a second plug-in portion, and the second plug-in portion can be plugged into or separated from the first plug-in portion along a plug-in direction so as to be electrically connected or disconnected. The first plug-in portion floats relative to the housing in a direction perpendicular to the plug-in direction under the cooperation of the first guide body and the second plug-in portion and is plug-connected with the second plug-in portion.

2. The battery device according to claim 1, characterized in that: The first plug-in portion comprises: A plug-in body, located in the housing and connected to the housing through the spring member; The plug-in extension body is connected to the plug-in body and penetrates the first shell wall of the shell along the plug-in direction and extends out of the shell. The plug-in extension body can be plugged with the second plug-in part under guidance.

3. The battery device according to claim 2, characterized in that: The first guide body is arranged around the plug extension body, and a guide surface is provided on the portion of the first guide body away from the plug body along the plug direction. During the plugging process of the first plug part and the second plug part, the second plug part contacts the guide surface.

4. The battery device according to claim 3, characterized in that: The first shell wall is provided with a first opening, the first guide body and the plug-in extension body penetrate the first shell wall via the first opening, and a gap is provided between the inner periphery of the first opening and the first guide body.

5. The battery device according to claim 2, characterized in that: The spring member includes a plurality of first spring members, which are respectively connected to the housing and the first plug-in portion along a direction intersecting the plug-in direction, and at least two of the first spring members are arranged opposite to each other with the first plug-in portion interposed therebetween.

6. The battery device according to claim 5, characterized in that: An even number of the first spring members are provided, and the even number of the first spring members are distributed around the first plug-in portion in a symmetrical manner about an axis.

7. The battery device according to claim 6, characterized in that: There are four first spring members, and the four first spring members are connected to the plug-in body at equal angles.

8. The battery device according to claim 2, characterized in that: The spring member further includes a second spring member, and the second spring member connects the housing and the first plug-in portion along the plug-in direction.

9. The battery device according to claim 3, characterized in that: The first guide body comprises a first guide section and a second guide section connected along the plugging direction, One end of the first guide section is connected to the plug body, and the other end is connected to the second guide section. The second guide section is formed such that the further away from the first guide section, the larger the inner diameter thereof is, and the inner circumferential surface of the second guide section provides the guide surface. Along the plugging direction, the plugging extension body does not exceed the first guiding section.

10. The battery device according to claim 1, characterized in that: The second connecting end further has a second guide body, and the first plug-in portion floats relative to the housing and is plugged with the second plug-in portion under the cooperation of the first guide body and the second guide body.

11. The battery device according to claim 3, characterized in that: The second plug-in portion has a plug-in sleeve extending along the plug-in direction. Under the cooperation of the first guide body and the plug-in sleeve, the plug-in extension body floats relative to the housing along a direction perpendicular to the plug-in direction and the plug-in extension body extends into the plug-in sleeve.

12. The battery device according to claim 11, characterized in that: The second connecting end further comprises a second guide body, the second guide body is protruding from the outer peripheral surface of the plug sleeve, and the second guide body is formed so that the farther away from the first plug portion, the higher the height of the protrusion from the outer peripheral surface. When the first insertion portion and the second insertion portion are inserted into each other, the guide surface contacts the second guide body.

13. The battery device according to claim 11, characterized in that: The first plug-in portion has a first contact electrode, and the first contact electrode is at least partially exposed at the end of the plug extension body facing the second plug-in portion; The second plug-in portion has a second contact electrode, and the second contact electrode is at least partially exposed at a position in the plug-in sleeve facing the first plug-in portion. The first plug-in portion is plug-connected with the second plug-in portion, and the first contact electrode and the second contact electrode are in contact with each other.

14. The battery device according to claim 1, characterized in that: The connector further comprises at least two contact terminals, each of which comprises a first contact and a second contact, the first contact and the second contact being connectable or separable, and each of the contact terminals being used to access the electrical circuit. When the first contact is connected to the second contact and the first plug-in part is plugged into the second plug-in part, the electrical circuit can be connected; when the first contact is separated from the second contact and / or the first plug-in part is separated from the second plug-in part, the electrical circuit is disconnected.

15. The battery device according to claim 1, characterized in that: The battery device further comprises: The cover body is connected to the box body and closes the accommodating cavity, and the first connecting end is connected to the cover body.

16. The battery device according to claim 15, characterized in that: The accommodating chamber includes a first accommodating chamber and a second accommodating chamber, the battery monomer assembly is accommodated in the first accommodating chamber, and the connector is accommodated in the second accommodating chamber. The first accommodating cavity and the second accommodating cavity share a cover.

17. The battery device according to claim 15, characterized in that: The accommodating chamber includes a first accommodating chamber and a second accommodating chamber, the battery monomer assembly is accommodated in the first accommodating chamber, and the connector is accommodated in the second accommodating chamber. The cover body includes a first cover body and a second cover body which are separately arranged. The first cover body closes the first accommodating cavity, the second cover body closes the second accommodating cavity, and the first connecting end is connected to the second cover body.

18. The battery device according to claim 16 or 17, characterized in that: The opening of the second accommodating cavity is configured as a maintenance opening of the battery device.

19. An electrical device, characterized in that: The battery device comprises the battery device according to any one of claims 1 to 18, wherein the battery device is used to store or provide electrical energy.

20. A connector, used to control the on and off of an electrical circuit, characterized in that: The connector includes a first connection end and a second connection end, The first connecting end comprises a housing, a first plug-in portion mounted on the housing, a plurality of spring members connecting the housing and the first plug-in portion, and a first guide body connected to the first plug-in portion; The second connection end has a second plug-in portion, and the second plug-in portion can be plugged into or separated from the first plug-in portion along a plug-in direction so as to be electrically connected or disconnected. The first plug-in portion floats relative to the housing in a direction perpendicular to the plug-in direction under the cooperation of the first guide body and the second plug-in portion and is plug-connected with the second plug-in portion.

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