Battery devices, electrical devices and connectors

Abstract

The present application discloses a battery device, an electrical device and a connector. The battery device includes: a box body having a receiving cavity; at least one battery cell assembly, received in the receiving cavity; a connector, at least partly located in the receiving 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 connection terminal and a second connection terminal, the first connection terminal has an elastic contact piece, the second connection terminal has a contact surface, the elastic contact piece contacts the contact surface so that the first connection terminal is electrically connected to the second connection terminal, the elastic contact piece includes a main body and an extension portion, a variable angle is formed between the two, and the elastic contact piece is configured to be elastically deformable in a first direction and elastically deformable along the contact surface, wherein the first direction is perpendicular to the contact surface. Therefore, the connection reliability of the connector is improved, thereby improving the reliability of the battery device.

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 installed in a battery device to temporarily disconnect the battery's high voltage system during maintenance. The manual service disconnect usually includes a connector, and the reliability of the connector connection affects the reliability of the battery device. Therefore, how to improve the reliability of the connector connection in the battery device has become one of the industry's issues. Summary of the invention

[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 terminal and a second connecting terminal, the first connecting terminal having an elastic contact piece, the second connecting terminal having a contact surface, the elastic contact piece contacting the contact surface so that the first connecting terminal is electrically connected to the second connecting terminal, the elastic contact piece comprising a main body and an extension portion, the main body being connected to the extension portion and forming an angle, the angle changing under the action of the pushing force of the contact surface on the extension portion, the elastic contact piece being configured to be elastically deformable in a first direction and elastically deformable along the contact surface, wherein the first direction is perpendicular to the contact surface.

[0007] Since the first connecting terminal and the second connecting terminal are electrically connected through the contact between the elastic contact piece and the contact surface, and the elastic contact piece can be elastically deformed in the first direction and can be elastically deformed along the contact surface, electrical connection can be achieved through the connector only by making the elastic contact piece reliably contact the contact surface through simple actions; moreover, the elastic contact piece can be deformed in a direction perpendicular to the contact surface, so that it can absorb assembly errors in the first direction and can always be reliably in contact with the contact surface under the action of the deformation restoring force; the elastic contact piece can also be elastically deformed along the contact surface, thereby absorbing assembly errors along the direction of the contact surface, so that the elastic contact piece and the contact surface can always be in a state of reliable contact, thereby improving the reliability of the battery device.

[0008] In some embodiments, the extension portion includes a first extension portion and a second extension portion, the contact surface includes a first contact surface for contact with the first extension portion and a second contact surface for contact with the second extension portion, the main body portion is connected to the first extension portion and forms a first angle, and the first angle can change under the action of the pushing pressure of the first contact surface on the first extension portion; the main body portion is connected to the second extension portion and forms a second angle, and the second angle can change under the action of the pushing pressure of the second contact surface on the second extension portion.

[0009] Thus, in the contact state, the first extension part, the main body part, the second extension part, the first contact surface and the second contact surface can make the electrical circuit connected; in addition, because the first angle and the second angle can change under the action of the pushing force of the contact surface on the extension part, the contact position of the first extension part on the first contact surface and the contact position of the second extension part on the second contact surface can change within a certain range relative to the main body part, thereby absorbing the assembly error between the elastic contact piece and the contact surface along the contact surface direction. In addition, the assembly error in a larger range can be absorbed by designing the contact surface to be larger.

[0010] In some embodiments, the first extension portion and the second extension portion are symmetrically disposed on both sides of the main body portion.

[0011] This allows the elastic contact piece to deform evenly, which helps maintain stable contact.

[0012] In some embodiments, the first extension portion has a connected first extension section and a first bend section, the first bend section bends from the end of the first extension section on the side away from the main body toward the side away from the first contact surface along the first direction, and the second extension portion has a connected second extension section and a second bend section, the second bend section bends from the end of the second extension section on the side away from the main body toward the side away from the second contact surface along the first direction, the connecting part between the first extension section and the first bend section can contact the first contact surface, and the connecting part between the second extension section and the second bend section can contact the second contact surface.

[0013] In this way, the first extension portion and the second extension portion can be in reliable and stable contact with the first contact surface and the second contact surface respectively. Moreover, since the connecting part between the extension section and the folded section can be in tangential contact with the contact surface, the contact impedance can be kept stable, and the contact impedance is not likely to change due to changes in the contact area.

[0014] In some embodiments, a connection portion between the first extension segment and the first return segment is formed into an arcuate shape, and a connection portion between the second extension segment and the second return segment is formed into an arcuate shape.

[0015] Thus, the connection part of the extended section and the return section can be more reliably contacted with the contact surface in a tangential manner, so that the contact impedance can be more reliably kept stable. Moreover, the arc-shaped connection part contacts the contact surface, which is not easy to damage the contact surface.

[0016] In some embodiments, a first raised portion is formed at a connection between the first extension segment and the first bend segment, and a raised surface of the first raised portion is formed into an arc shape; a second raised portion is formed at a connection between the second extension segment and the second bend segment, and a raised surface of the second raised portion is formed into an arc shape; the raised surface of the first raised portion contacts the first contact surface, and the raised surface of the second raised portion contacts the second contact surface.

[0017] As a result, when the raised surface of the raised portion contacts the contact surface, a point-to-surface contact form can be formed, so that the contact impedance can be more reliably kept stable, thereby improving the contact stability.

[0018] In some embodiments, the first connecting terminal includes a first plug-in portion and the elastic contact piece connected to the first plug-in portion, the second connecting terminal includes a second plug-in portion and a contact plate provided on the second plug-in portion, the contact plate has the contact surface, and one of the first plug-in portion and the second plug-in portion is at least partially inserted into the other of the first plug-in portion and the second plug-in portion.

[0019] Therefore, the first connection terminal and the second connection terminal can be connected and disconnected by plugging and unplugging, which is easy to operate.

[0020] In some embodiments, the first connecting terminal further includes an elastic pressing portion, and the elastic contact piece is connected to the first plug-in portion via the elastic pressing portion.

[0021] Due to the elastic pressing portion, the assembly error in the first direction can be absorbed within a larger range, and the elastic contact piece can be in contact with the contact surface more stably and reliably, thereby greatly reducing the risk of poor connection.

[0022] In some embodiments, the elastic pressing portion includes a spring member and a floating member, the spring member is connected between the first plug-in portion and the floating member and is in a compressed state at least when the elastic contact member is in contact with the contact surface, the floating member is installed to be able to float along the first direction relative to the first plug-in portion, and the elastic contact member is connected to a side of the floating member that is away from the spring member along the first direction.

[0023] Since the spring member applies an urging force to the elastic contact member via the floating member, the elastic pressing portion can be realized with a simple structure and can be easily assembled.

[0024] In some embodiments, the first plug-in portion has a cylindrical wall and an end wall connected to one end of the cylindrical wall, the elastic pressing portion is located in the space enclosed by the cylindrical wall, the inner circumferential surface of the cylindrical wall is provided with a first protrusion protruding radially inward, the outer circumferential surface of the floating member is provided with a second protrusion protruding radially outward, and the floating member is installed so that the second protrusion is located between the first protrusion and the end wall and the first protrusion and the second protrusion block each other in the first direction.

[0025] Since the elastic pressing portion is located in the space surrounded by the cylindrical wall, the connector can be minimized in the first direction while realizing the plug-in structure; in addition, through the mutual cooperation of the first protrusion and the second protrusion, the floating of the floating part can be easily achieved, and the floating part is not easy to accidentally fall out of the first plug-in part.

[0026] In some embodiments, the second connection terminal further has an electrical connection portion connected to the contact plate, and the electrical connection portion is used to access the electrical circuit and / or the electrical circuit control circuit.

[0027] Thus, the electrical connection portion can be connected to the battery management system (BMS: Battery Management System) of the battery device through the wiring harness, thereby sending a signal to the battery management system (BMS: Battery Management System) to cut off the high-voltage electrical circuit.

[0028] 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 elastic contact piece is in contact with the contact surface, the electrical circuit can be connected; when the first contact and the second contact are separated and / or the elastic contact piece is not in contact with the contact surface, the electrical circuit is disconnected.

[0029] Thereby, an electrical connector with an interlocking function can be formed, thereby further improving the protective effect of the connector.

[0030] In some embodiments, the connector further includes a connector cover and a connector base, the first contact is disposed on the connector cover, the second contact and the second connecting terminal are disposed on the connector base, and the first connecting terminal is separately disposed relative to the connector cover.

[0031] Thus, the first connecting terminal and the second connecting terminal can be turned on and off independently of the first contact and the second contact. In this way, the connection between the first connecting terminal and the second connecting terminal can be disconnected first to put the electrical circuit into a power-off state, and then the connection between the first contact and the second contact can be disconnected in the power-off state. Therefore, compared with the case of disconnecting the connection between the first contact and the second contact in the power-on state, the risk of electric shock during operation is reduced.

[0032] 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 terminal is connected to the cover body.

[0033] Thus, as the cover is separated from the box, the connection between the first connection terminal and the second connection terminal 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.

[0034] 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.

[0035] 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.

[0036] 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 that 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 terminal is connected to the second cover body.

[0037] 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 terminal and the second connecting terminal is disconnected, so that the second accommodating cavity can be operated in the power-off state.

[0038] In some embodiments, the opening of the second accommodating cavity is configured as a maintenance port of the battery device.

[0039] This enables maintenance to be carried out in a power-off state.

[0040] 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.

[0041] 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.

[0042] A third aspect of the present application provides a connector for controlling the on and off of an electrical circuit, the connector comprising a first connection terminal and a second connection terminal for accessing the electrical circuit, the first connection terminal having an elastic contact piece, the second connection terminal having a contact surface, the elastic contact piece contacts the contact surface so that the first connection terminal is electrically connected to the second connection terminal, the elastic contact piece comprises a main body and an extension portion, the main body portion is connected to the extension portion and forms an angle, the angle changes under the action of the pushing force of the contact surface on the extension portion, the elastic contact piece is configured to be able to elastically deform along a first direction and to be able to elastically deform along the contact surface, wherein the first direction is perpendicular to the contact surface.

[0043] Since the first connecting terminal and the second connecting terminal are electrically connected through the contact between the elastic contact piece and the contact surface, and the elastic contact piece can be elastically deformed in the first direction and can be elastically deformed along the contact surface, the electrical connection can be achieved through the connector only by a simple action to make the elastic contact piece reliably contact the contact surface; moreover, the elastic contact piece can be deformed in a direction perpendicular to the contact surface, so it can absorb the assembly error in the first direction and can always be reliably in contact with the contact surface under the action of the deformation restoring force; the elastic contact piece can also be elastically deformed along the contact surface, thereby absorbing the assembly error along the direction of the contact surface, so that the elastic contact piece and the contact surface can always be in a state of reliable contact.

[0044] 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

[0045] 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:

[0046] Figure 1 A schematic diagram of the structure of a vehicle provided in some embodiments of the present application;

[0047] Figure 2 A schematic diagram of a partial structure of a battery device provided in some embodiments of the present application;

[0048] Figure 3 A schematic diagram of a three-dimensional structure of a cover body connected to a first connection terminal provided in some embodiments of the present application;

[0049] 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;

[0050] Figure 5 A schematic diagram of a partial three-dimensional structure of a connector provided in some embodiments of the present application;

[0051] Figure 6 A schematic top view of a connector in a connected state provided for some embodiments of the present application;

[0052] Figure 7 for Figure 6 AA cross-sectional view of ;

[0053] Figure 8 A schematic top view of a first connecting terminal provided in some embodiments of the present application;

[0054] Fig. 9 for Figure 8 BB cross-sectional view;

[0055] Fig.10 A schematic diagram of an exploded structure of a first connecting terminal provided in some embodiments of the present application;

[0056] Fig.11 A schematic diagram of a three-dimensional structure of a contact state between an elastic contact member and a contact surface provided in some embodiments of the present application;

[0057] Fig.12 A schematic top view of a battery device provided for some embodiments of the present application;

[0058] Fig.13 for Fig.12 An exploded schematic diagram of the structure shown in the CC cross-sectional diagram.

[0059] Description of Reference Numerals

[0060] 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 terminal; 111 first plug-in portion; 1111 cylindrical wall; 1112 end wall; 1113 first protrusion; 1114 mounting flange; 112 elastic contact member; 1123 main body; 1124 first extension portion; 1125 second extension portion; 1124a first extension section; 1124b first return section; 1125a second extension section; 1125b second return section; 1126 through hole; 1127 first protrusion; 1128 second protrusion; 113 elastic pressing portion; 114 spring member; 115 floating member; 1151 second protrusion; 12 second connecting terminal; 121 second plug-in portion; 122 contact surface; 1221 first contact surface; 1222 second contact surface; 123 electrical connection portion; 124 contact plate; 13 contact terminal; 131 first contact; 132 second contact; 14 connector cover; 15 connector base; X first direction; Y second direction; Z third direction; θ1 first angle; θ2 second angle. DETAILED DESCRIPTION

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] 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.

[0068] 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.

[0069] 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.

[0070] Below, the embodiments of the present application are described in detail.

[0071] 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.

[0072] A manual service switch (MSD: Manual Service Disconnect) is usually provided in the battery device, which is used to temporarily disconnect the battery high voltage system 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 connectors in battery devices has become one of the industry's needs.

[0073] 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.

[0074] In order to achieve the above-mentioned purpose, an embodiment of the present application provides a battery device, which includes: 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 terminal and a second connecting terminal, the first connecting terminal has an elastic contact piece, the second connecting terminal has a contact surface, the elastic contact piece contacts the contact surface so that the first connecting terminal is electrically connected to the second connecting terminal, and the elastic contact piece is configured to be able to elastically deform along a first direction and to be able to elastically deform along the contact surface, wherein the first direction is perpendicular to the contact surface.

[0075] Since the first connection terminal and the second connection terminal are electrically connected through the contact between the elastic contact piece and the contact surface, and the elastic contact piece can be elastically deformed in the first direction and can be elastically deformed along the contact surface, the electrical connection can be achieved through the connector by simply making the elastic contact piece reliably contact the contact surface; moreover, the elastic contact piece can be deformed in a direction perpendicular to the contact surface, so it can absorb the assembly error in the first direction, and can always reliably contact the contact surface under the action of the deformation restoring force; the elastic contact piece can also be elastically deformed along the contact surface, thereby absorbing the assembly error along the direction of the contact surface, so that the elastic contact piece and the contact surface can always be in a state of reliable contact. Therefore, the connector provided in the embodiment of the present application can absorb tolerance to a greater extent, improve the connection reliability, and thus improve the use reliability of the battery device.

[0076] 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.

[0077] 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.

[0078] 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.

[0079] The connector according to the embodiment of the present application may be applicable to a battery device.

[0080] 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.

[0081] Figure 1The 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.

[0082] 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.

[0083] Figure 2 A schematic diagram of the partial structure of a battery device provided in some embodiments of the present application.

[0084] 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.

[0085] In some embodiments, a battery cell assembly is generally formed by arranging a plurality of battery cells.

[0086] 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.

[0087] 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.

[0088] 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.

[0089] 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.

[0090] 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.

[0091] 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.

[0092] 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.

[0093] In some embodiments, the opening of the second receiving chamber S2 is configured as a maintenance port for the battery device 100 .

[0094] When the second cover 105 is opened, maintenance personnel or maintenance tools can enter the maintenance opening to perform operations.

[0095] 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.

[0096] Below, refer to Figures 3 to 13 The battery devices of some embodiments of the present application are described in detail.

[0097] Figure 3 A schematic diagram of a three-dimensional structure of a cover body connected to a first connection terminal 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 5A schematic diagram of a partial three-dimensional structure of a connector provided in some embodiments of the present application; Figure 6 A schematic top view of a connector in a connected state provided for some embodiments of the present application; Figure 7 for Figure 6 AA cross-sectional view of ; Figure 8 A schematic top view of a first connecting terminal provided in some embodiments of the present application; Fig. 9 for Figure 8 BB cross-sectional view; Fig.10 A schematic diagram of an exploded structure of a first connecting terminal provided in some embodiments of the present application; Fig.11 A schematic diagram of a three-dimensional structure of a contact state between an elastic contact member and a contact surface provided in some embodiments of the present application; Fig.12 A schematic top view of a battery device provided for some embodiments of the present application; Fig.13 for Fig.12 An exploded schematic diagram of the structure shown in the CC cross-sectional diagram.

[0098] In the description of the embodiment 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 connecting terminal and the second connecting terminal”, the direction of the arrow Y represents the “second direction”, and the direction of the arrow Z represents the “third direction”. The contact surface 122 is generally located in the plane where the arrows Y and Z are located, and the “first direction”, the “second direction” and the “third direction” intersect each other.

[0099] like Figures 2 to 11 As shown, the battery device 100 of the embodiment of the present application includes: the battery device 100 includes: a box body 101, having a storage chamber S; at least one battery cell assembly (not shown), which is accommodated in the storage chamber S; a connector 1, which is at least partially located in the storage chamber S and is 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 connection terminal 11 and a second connection terminal 12; the first connection terminal 11 has an elastic contact member 112; the second connection terminal 12 has a contact surface 122; the elastic contact member 112 contacts the contact surface 122 so that the first connection terminal 11 is electrically connected to the second connection terminal 12; the elastic contact member 112 includes a main body portion 1123 and an extension portion (e.g. Fig.10 The first extension portion 1124 and / or the second extension portion 1125 shown in the figure, the main body 1123 is connected to the extension portion and forms an angle (for example Fig.10 The first angle θ1 and / or the second angle θ2 shown in FIG. 1 are the angles between the contact surface 122 and the extension portion (eg Fig.10The elastic contact member 112 is configured to be elastically deformable along a first direction X and elastically deformable along a contact surface 122, wherein the first direction X is perpendicular to the contact surface 122.

[0100] In the connector 1 of the embodiment of the present application, the first connection terminal 11 and the second connection terminal 12 are used to access the electrical circuit, so that the connector 1 can be used to control the on and off of the electrical circuit.

[0101] In some embodiments, the electrode terminals of the battery cell 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 loop. Of course, the electrical loop 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 directly electrically connected to the battery cell assembly; the connector 1 can also be indirectly connected to the power supply circuit and indirectly 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. 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 (such as interconnected contact terminals) to form a connector with an interlocking function.

[0102] 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.

[0103] 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 electrical circuit can also be turned on and off 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 end of the connector 1. Of course, the connector 1 can also include a high-voltage connection end connected to the high-voltage electrical circuit. The power on or off of the low-voltage connection end can be directly or through other control circuits to control the power on or off of the high-voltage connection end, 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.

[0104] 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.

[0105] The first connection terminal 11 and the second connection terminal 12 are electrically connected by the contact between the elastic contact member and the contact surface. In order to maintain the contact state between the elastic contact member and the contact surface, the first connection terminal 11 and the second connection terminal 12 are connected to each other and fixed to each other. For example, the first connection terminal 11 and the second connection terminal 12 can be connected by plugging and can be disconnected by pulling. Exemplarily, the first connection terminal 11 and the second connection terminal 12 can be a plug and a socket, respectively.

[0106] The elastic contact member 112 can be elastically deformed. In some embodiments, the elastic contact member 112 can be made of a material (such as metal) that can generate a deformation recovery force, such as copper, aluminum, copper alloy, etc. with good conductivity. In other embodiments, the elastic contact member 112 can be implemented by being configured as a structure with a deformation recovery force. Exemplarily, the elastic contact member 112 is a copper member, and is configured as a structure with a deformation recovery force.

[0107] Since the first connection terminal 11 and the second connection terminal 12 are electrically connected through the contact between the elastic contact piece 112 and the contact surface 122, and the elastic contact piece 112 can be elastically deformed along the first direction and can be elastically deformed along the contact surface 122, therefore, electrical connection can be achieved through the connector 1 by simply making the elastic contact piece 112 reliably contact the contact surface 122; moreover, the elastic contact piece 112 can be deformed in a direction perpendicular to the contact surface 122, thereby absorbing assembly errors in the first direction X, and the elastic contact piece 112 can always be reliably in contact with the contact surface under the action of the deformation restoring force; the elastic contact piece 112 can also be elastically deformed along the contact surface 122, thereby absorbing assembly errors along the contact surface direction, so that the elastic contact piece and the contact surface can always be in a state of reliable contact, thereby improving the reliability of the battery device 100.

[0108] In some embodiments, Figures 9 to 11As shown, the extension portion includes a first extension portion 1124 and a second extension portion 1125, and the contact surface 122 includes a first contact surface 1221 for contact with the first extension portion 1124 and a second contact surface 1222 for contact with the second extension portion 1125. The main body 1123 is connected to the first extension portion 1124 and forms a first angle θ1, which can be changed under the action of the pushing force of the first contact surface 1221 on the first extension portion 1124; the main body 1123 is connected to the second extension portion 1125 and forms a second angle θ2, which can be changed under the action of the pushing force of the second contact surface 1222 on the second extension portion 1125.

[0109] The first extension portion 1124 and the second extension portion 1125 are respectively connected to the main body 1123, and may be connected by integral formation or by welding or other connection methods. The first extension portion 1124 and the second extension portion 1125 extend in a direction away from the main body 1123, and get closer to the contact surface 122 as they get away from the main body 1123. When the elastic contact member 112 is in a natural state without deformation, the parts of the first extension portion 1124 and the second extension portion 1125 that are used to contact the contact surface 122 are closer to the contact surface 122 than the main body 1123.

[0110] like Figures 9 to 11 As shown, the main body 1123 is formed into a groove shape with an opening toward the contact surface 122, and the first extension portion 1124 and the second extension portion 1125 are respectively formed in the groove width direction ( Fig.10 The first extension portion 1124 and the second extension portion 1125 respectively form a first angle θ1 and a second angle θ2 with the groove sidewalls on the corresponding sides. The first extension portion 1124 and the second extension portion 1125 can change the angles of the first angle θ1 and the second angle θ2 under the action of an external force along the first direction X. The external force that changes the first angle θ1 and the second angle θ2 can be an external force pressing the main body 1123 along the first direction X and an external force pushing the first extension portion 1124 and the second extension portion 1125 along the first direction X.

[0111] In a natural state, the first angle θ1 may be less than 90°, the second angle θ2 may be less than 90°, and the first angle θ1 and the second angle θ2 may be equal or different. Fig.10 In the illustrated embodiment, the first angle θ1 and the second angle θ2 are substantially equal. Under the action of the pushing force along the first direction X, the first angle θ1 and the second angle θ2 may become larger, so that the first extension portion 1124 and the second extension portion 1125 are respectively in contact with the contact surface 122 at a distance. The first angle θ1 and the second angle θ2 in the deformed state do not exceed 90°, and may be less than 90°.

[0112] In a specific embodiment, Fig.10 As shown, the first extension portion 1124 may extend in the second direction Y and the third direction Z in a direction away from the main body portion 1123. The second extension portion 1125 may extend in the second direction Y and the third direction Z in a direction away from the main body portion 1123. The first extension portion 1124 and the second extension portion 1125 may be arranged opposite to each other in the second direction Y.

[0113] In some embodiments, Fig.11 As shown, the first extension portion 1124 and the second extension portion 1125 may be plate-shaped, and the first extension portion 1124 and the second extension portion 1125 may both have a through hole 1126 (only the through hole 1126 of the second extension portion 1125 is shown). Therefore, the material fluidity of the first extension portion 1124 and the second extension portion 1125 is good and can be easily deformed relative to the main body portion 1123.

[0114] like Fig.11 As shown, the contact surface 122 on the side of the second connection terminal 12 includes a first contact surface 1221 and a second contact surface 1222, and the two contact surfaces are arranged separately from each other and separated by a certain insulation distance. The first contact surface 1221 contacts the first extension portion 1124, and the second contact surface 1222 contacts the second extension portion 1125. The first contact surface 1221 and the second contact surface 1222 both have a certain area. In an embodiment in which the first extension portion 1124 and the second extension portion 1125 are arranged relative to each other along the second direction Y and can be separated from each other along the second direction Y by changing the angle, the first contact surface 1221 and the second contact surface 1222 are respectively formed to have a longer dimension along the second direction Y, so that the first extension portion 1124 and the second extension portion 1125 can contact the first contact surface 1221 and the second contact surface 1222 even if they are deformed.

[0115] In some embodiments, the first contact surface 1221 and the second contact surface 1222 may be surfaces of a structure made of a conductive material, and the conductive material may be, for example, a metal, such as copper, copper alloy, etc. The materials of the first contact surface 1221 and the second contact surface 1222 may be the same or different. Fig.11 In the illustrated embodiment, the first contact surface 1221 and the second contact surface 1222 are made of the same material.

[0116] In some embodiments, the first contact surface 1221 and the second contact surface 1222 are connected to the positive terminal and the negative terminal, respectively. Of course, the first contact surface 1221 and the second contact surface 1222 can also be connected to the negative terminal and the positive terminal, respectively.

[0117] Optionally, when viewed along the first direction X, the shapes of the first contact surface 1221 and the second contact surface 1222 may be the same or different, for example, they may be square, rectangular, other shapes with curved edges, or irregular shapes.

[0118] Thus, in the contact state, the first extension part 1124, the main body 1123, the second extension part 1125, the first contact surface 1221 and the second contact surface 1222 can make the electrical circuit connected; in addition, since the first angle θ1 and the second angle θ2 can change under the action of the pushing force of the contact surface 122 on the extension part, the contact position of the first extension part 1124 on the first contact surface 1221 and the contact position of the second extension part 1125 on the second contact surface 1222 can change within a certain range relative to the main body 1123, thereby absorbing the assembly error between the elastic contact member 112 and the contact surface 122 along the direction of the contact surface 122. In addition, the assembly error in a larger range can be absorbed by designing the contact surface 122 to be larger.

[0119] In some embodiments, Figures 9 to 11 As shown, the first extension portion 1124 and the second extension portion 1125 are symmetrically arranged on both sides of the main body portion 1123 .

[0120] Thus, the elastic contact member 112 can be deformed in a balanced manner, which helps to maintain stable contact.

[0121] In some embodiments, Fig.10 As shown, the first extension portion 1124 has a connected first extension section 1124a and a first bend section 1124b, the first bend section 1124b is bent from the end of the first extension section 1124a on the side away from the main body 1123 toward the side away from the first contact surface 1221 along the first direction X, the second extension portion 1125 has a connected second extension section 1125a and a second bend section 1125b, the second bend section 1125b is bent from the end of the second extension section 1125a on the side away from the main body 1123 toward the side away from the second contact surface 1222 along the first direction X, the connection portion between the first extension section 1124a and the first bend section 1124b can contact the first contact surface 1221, and the connection portion between the second extension section 1125a and the second bend section 1125b can contact the second contact surface 1222.

[0122] like Fig.10As shown, the first extension portion 1124 has a first extension section 1124a extending obliquely from the main body 1123 along the first direction X toward the direction close to the first contact surface 1221, and the first extension section 1124a is inclined in a manner of getting further away from the main body 1123 along the second direction Y as it approaches the first contact surface 1221 along the first direction X. A first folding section 1124b connected to the first extension section 1124a is provided at the end away from the main body 1123. The connection portion between the first extension section 1124a and the first folding section 1124b forms a protruding portion protruding toward the first contact surface 1221, so that the protruding portion becomes a position in contact with the first contact surface 1221. In other words, the protruding portion contacts the first contact surface 1221 in a manner tangent to the first contact surface 1221.

[0123] In addition, the first extension section 1124a and the first folding section 1124b can be smoothly connected. The first folding section 1124b can be formed to be folded back along the first direction X away from the first contact surface 1221 relative to the first extension section 1124a; Fig.10 As shown, it also has a portion extending along the second direction Y toward the direction close to the main body 1123.

[0124] The second extension portion 1125 has a second extension section 1125a and a second return section 1125b. The second extension portion 1125 may be formed symmetrically to the first extension portion 1124, so a detailed description of the second extension portion 1125 is omitted here.

[0125] In this way, the first extension portion 1124 and the second extension portion 1125 can be in reliable and stable contact with the first contact surface 1221 and the second contact surface 1222 respectively. Moreover, since the connecting part between the extension section and the folded section can contact the contact surface in a tangential manner, the contact impedance can be kept stable, and it is not easy to cause the contact impedance to change due to changes in the contact area.

[0126] In some embodiments, Fig.10 As shown, the connection portion between the first extension section 1124a and the first bend section 1124b is formed into an arc shape, and the connection portion between the second extension section 1125a and the second bend section 1125b is formed into an arc shape.

[0127] Optionally, the connection portion may be formed into an arc surface, and the contact position between the connection portion and the contact surface may be the position of a generatrix on the arc surface.

[0128] When the first extension portion 1124 and the second extension portion 1125 contact the first contact surface 1221 and the second contact surface 1222 respectively, they may first contact a busbar position on the arc surface. As the elastic contact piece 112 is pressed, the position on the arc surface that contacts the contact surface changes slightly, and the contact surface may contact another busbar position that is closer to the main body 1123 than the initial busbar position.

[0129] Thus, the connection portion between the extended section and the folded section can more reliably contact the contact surface in a tangential manner, thereby more reliably maintaining the contact impedance stable. Moreover, the arc-shaped connection portion contacts the contact surface 122, which is not easy to damage the contact surface 122.

[0130] In some embodiments, Fig.10 and Fig.11 As shown, a first raised portion 1127 is formed at the connection portion between the first extension section 1124a and the first bend section 1124b, and a raised surface of the first raised portion 1127 is formed into an arc shape; a second raised portion 1128 is formed at the connection portion between the second extension section 1125a and the second bend section 1125b, and a raised surface of the second raised portion 1128 is formed into an arc shape; the raised surface of the first raised portion 1127 contacts with the first contact surface 1221, and the raised surface of the second raised portion 1128 contacts with the second contact surface 1222.

[0131] like Fig.10 and Fig.11 As shown, a first raised portion 1127 raised toward the first contact surface 1221 is formed at the connection portion between the first extension section 1124a and the first bend section 1124b, and the raised surface of the first raised portion 1127 is formed into an arc surface, and the raised surface of the first raised portion 1127 is in contact with the first contact surface 1221, thereby forming point / line and surface contact, so that the contact impedance remains stable and the contact stability is improved; a second raised portion 1128 raised toward the second contact surface 1222 is formed at the connection portion between the second extension section 1125a and the second bend section 1125b, and the raised surface of the second raised portion 1128 is formed into an arc surface, and the raised surface of the second raised portion 1128 is in contact with the second contact surface 1222, thereby forming point / line and surface contact, so that the contact impedance remains stable and the contact stability is improved.

[0132] As a result, when the raised surface of the raised portion contacts the contact surface, a point / line and surface contact form can be formed, so that the contact impedance can be more reliably kept stable, thereby improving the contact stability.

[0133] In some embodiments, Figure 3 , Figure 5 , Fig.10 and Fig.11As shown, the first connecting terminal 11 includes a first plug-in portion 111 and an elastic contact piece 112 connected to the first plug-in portion 111, and the second connecting terminal includes a second plug-in portion 121 and a contact plate 124 arranged on the second plug-in portion 121, the contact plate has a contact surface 122, and one of the first plug-in portion 111 and the second plug-in portion 121 is at least partially inserted into the other of the first plug-in portion 111 and the second plug-in portion 121.

[0134] exist Figure 7 In the specific embodiment shown, part of the second plug-in portion 121 is inserted into the inner cavity of the first plug-in portion 111. Optionally, the outer circumference of the second plug-in portion 121 and the inner circumference of the first plug-in portion 111 may be interference fit, so as to achieve a stable connection between the two plug-in portions. Optionally, at least one of the outer circumference of the second plug-in portion 121 and the inner circumference of the first plug-in portion 111 may be provided with a snap-fit ​​portion, and the stable connection between the two plug-in portions is achieved by matching with the other.

[0135] The second plug-in portion 121 has a contact plate 124, and the surface of the contact plate 124 at least on the side in contact with the elastic contact member 112 is formed in a flat shape. Fig.11 In the specific embodiment shown, the contact plate 124 is formed as a flat plate. The two contact plates 124 are spaced apart from each other and insulated from each other. The two contact plates 124 can be connected to the positive terminal side and the negative terminal side of the circuit respectively.

[0136] Therefore, the first connection terminal 11 and the second connection terminal 12 can be connected and disconnected by plugging and unplugging, which is easy to operate.

[0137] In some embodiments, Figures 7 to 10 As shown, the first connection terminal 11 further includes an elastic pressing portion 113 , and the elastic contact member 112 is connected to the first plug-in portion 111 via the elastic pressing portion 113 .

[0138] like Fig. 9 or Fig.10 As shown, along the first direction X, the inner surface of the first plug-in portion 111, the elastic pressing portion 113 and the elastic contact piece 112 are connected in sequence. During the plugging process of the first plug-in portion 111 and the second plug-in portion 121, the contact surface 122 applies force to the elastic contact piece 112, so that the elastic contact piece 112 applies force to the elastic pressing portion 113. Driven by the elastic pressing portion 113, the elastic contact piece 112 can float along the first direction X relative to the cylindrical wall 1111 along the first direction X, thereby absorbing the assembly error of the connector along the first direction X.

[0139] Optionally, the elastic contact member 112 and the elastic pressing portion 113 may be directly connected or indirectly connected, and the first plug-in portion 111 and the elastic pressing portion 113 may be directly connected or indirectly connected.

[0140] Due to the elastic pressing portion 113 , the assembly error in the first direction can be absorbed within a larger range, and the elastic contact piece can be in contact with the contact surface more stably and reliably, thereby greatly reducing the risk of poor connection.

[0141] In some embodiments, Figures 7 to 10 As shown, the elastic pressing portion 113 includes a spring member 114 and a floating member 115. The spring member 114 is connected between the first plug-in portion 111 and the floating member 115 and is in a compressed state at least when the elastic contact member 112 is in contact with the contact surface 122. The floating member 115 is installed to be able to float along the first direction X relative to the first plug-in portion 111. The elastic contact member 112 is connected to the side of the floating member 115 along the first direction X that is away from the spring member 114.

[0142] In some embodiments, the spring member 114 is an elastic component, and the spring member 114 can be compressed under the action of an external force and return to its original state after the external force is removed. For example, the spring member 114 can be a spring.

[0143] Along the first direction X, the inner surface of the first plug-in portion 111 , the spring member 114 , the floating member 115 and the elastic contact member 112 are sequentially connected, wherein the connection between any two components may be direct or indirect.

[0144] Optionally, when the elastic contact member 112 is not in contact with the contact surface 122 , the spring member 114 may be in a compressed state or in an uncompressed state; however, when the elastic contact member 112 is in contact with the contact surface 122 , the spring member 114 is in a compressed state.

[0145] In some embodiments, driven by the spring member 114 , the floating member 115 can float along the first direction X relative to the first plug-in portion 111 .

[0146] In some embodiments, during the plug-in process between the first plug-in portion 111 and the second plug-in portion 121, the contact surface 122 applies force to the elastic contact member 112, the elastic contact member 112 applies force along the first direction X to the floating member 115, and the floating member 115 applies force along the first direction X to the spring member 114. As a result, the spring member 114 can be compressed along the first direction X and drive the floating member 115 to move along the first direction, thereby driving the elastic contact member 112 to move along the first direction.

[0147] Optionally, the floating member 115 may be plate-shaped, and the plate-shaped floating member may be arranged perpendicular to the first direction X. The floating member 115 may also be cylindrical, and the accommodating portion of the cylindrical floating member 115 accommodates at least part of the spring member 114. Of course, the floating member 115 may also be other shapes.

[0148] Since the spring member applies an urging force to the elastic contact member via the floating member, the elastic pressing portion can be realized with a simple structure and can be easily assembled.

[0149] In some embodiments, Fig. 9 and Fig.10 As shown, the first plug-in portion 111 has a cylindrical wall 1111 and an end wall 1112 connected to one end of the cylindrical wall 1111, the elastic pressing portion 113 is located in the space enclosed by the cylindrical wall 1111, the inner circumferential surface of the cylindrical wall 1111 is provided with a first protrusion 1113 protruding radially inwardly, the outer circumferential surface of the floating member 115 is provided with a second protrusion 1151 protruding radially outwardly, and the floating member 115 is installed so that the second protrusion 1151 is located between the first protrusion 1113 and the end wall 1112 and the first protrusion 1113 and the second protrusion 1151 block each other in the first direction X.

[0150] In some embodiments, Fig. 9 and Fig.10 As shown, the end wall 1112 is connected to one end of the cylindrical wall 1111 in the first direction away from the elastic pressing portion 113. In the first direction X, the end wall 1112, the spring member 114, the floating member 115 and the elastic contact member 112 are connected in sequence.

[0151] Optionally, the first protrusions 1113 may be continuously arranged along the inner circumference of the cylindrical wall 1111 , or a plurality of first protrusions 1113 may be arranged at intervals along the inner circumference of the cylindrical wall 1111 .

[0152] In some embodiments, Fig. 9 As shown, the cylindrical wall 1111 can be a cylindrical side wall with a hollow interior. The cylindrical wall 1111 has a cylindrical extension body connected to the cylindrical wall body and extending along the first direction X. The cylindrical extension body is located in the cylindrical wall body, and when observed along the third direction Z, the cylindrical wall body and the cylindrical extension body are arranged at intervals along the second direction Y. The first protrusion 1113 is provided at one end of the cylindrical extension body away from the cylindrical wall body along the second direction Y. Further, the first protrusion 1113 is provided at one end of the cylindrical extension body away from the end wall 1112 along the first direction X. Further, the end of the cylindrical extension body away from the end wall 1112 along the first direction does not exceed the end of the cylindrical wall body away from the end wall 1112 along the first direction. Further, the side of the first protrusion 1113 away from the end wall 1112 along the first direction X is formed into an arc surface. Therefore, when the cylindrical wall 1111 and the floating member 115 are assembled, the first protrusion 1113 can move along the second direction Y and away from the second protrusion 1151, so that the assembly of the cylindrical wall 1111 and the floating member 115 is simple and labor-saving.

[0153] Optionally, the first protrusion 1113 can be set at one end of the inner circumference of the cylindrical wall 1111 along the first direction X away from the end wall 1112, or the first protrusion 1113 can be set at a substantially middle position of the inner circumference of the cylindrical wall 1111 along the first direction X.

[0154] Optionally, the second protrusions 1151 may be continuously arranged along the outer circumference of the floating member 115 , or a plurality of second protrusions 1151 may be arranged at intervals along the outer circumference of the floating member 115 .

[0155] In some embodiments, Fig. 9 As shown, the floating member 115 has a cylindrical side wall parallel to the first direction X, and the cylindrical side wall has a gap extending along the first direction. The gap passes through one end of the cylindrical side wall along the first direction and away from the elastic contact member 112. Therefore, when the cylindrical wall 1111 and the floating member 115 are assembled, the second protrusion 1151 can move along the second direction Y and away from the first protrusion 1113, making the assembly of the cylindrical wall 1111 and the floating member 115 simple and labor-saving.

[0156] Optionally, the second protrusion 1151 can be set at one end of the outer circumference of the floating member 115 along the first direction X close to the end wall 1112, and the second protrusion 1151 can also be set at a substantially middle position of the outer circumference of the floating member 115 along the first direction X.

[0157] In some embodiments, the shapes of the first protrusion 1113 and the second protrusion 1151 may be the same or different.

[0158] In some embodiments, along the first direction X, the second protrusion 1151 is located between the first protrusion 1113 and the end wall 1112, and along the first direction X, the first protrusion 1113 and the second protrusion 1151 block each other, which can reduce the probability of the floating member accidentally coming out of the first plug-in portion. Since the elastic pressing portion is located in the space surrounded by the cylindrical wall, the connector can be miniaturized as much as possible in the first direction while realizing the plug-in structure; in addition, through the mutual cooperation of the first protrusion and the second protrusion, the floating member can be easily floated, and the floating member is not easy to accidentally come out of the first plug-in portion.

[0159] In some embodiments, Fig.11 As shown, the second connection terminal 12 further has an electrical connection portion 123 connected to the contact plate 124 , and the electrical connection portion 123 is used to access an electrical circuit or an electrical circuit control circuit.

[0160] In some embodiments, the electrical connection portion 123 is electrically connected to the contact plate 124 , and the contact plate 124 is connected to the electrical circuit and / or the electrical circuit control circuit through the electrical connection portion 123 .

[0161] In some embodiments, the electrical connection portion 123 is electrically connected to the contact plate 124 , and the contact plate 124 is connected to the electrical circuit and the electrical circuit control circuit through the electrical connection portion 123 .

[0162] In some embodiments, the electrical connection portion 123 is electrically connected to the contact plate 124 , and the contact plate 124 is connected to the electrical circuit through the electrical connection portion 123 .

[0163] In some embodiments, the electrical connection portion 123 is electrically connected to the contact plate 124 , and the contact plate 124 is connected to the electrical circuit control circuit through the electrical connection portion 123 .

[0164] like Fig.11 As shown, in a specific embodiment, the electrical connection portion 123 is in the shape of a long strip extending along the first direction X, one end of the electrical connection portion 123 along the first direction X is electrically connected to the contact plate 124, and the other end of the electrical connection portion 123 along the first direction X is electrically connected to the electrical circuit. The electrical circuit control circuit may be a control circuit or controller in a battery management system (BMS: Battery Management System) for controlling the on-off of an electrical circuit of a battery cell outputting electrical energy.

[0165] Thus, the electrical connection portion 123 can be connected to the battery management system (BMS) of the battery device through the wiring harness, thereby sending a signal of cutting off the high-voltage electrical circuit to the battery management system.

[0166] In some embodiments, Figure 4 , Figure 5 and Figure 7 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 elastic contact piece 112 is in contact with the contact surface 122, the electrical circuit can be connected; when the first contact 131 and the second contact 132 are separated and / or the elastic contact piece 112 is not in contact with the contact surface 122, the electrical circuit is disconnected.

[0167] In some embodiments, the connector may include two, three or four contact terminals 13 .

[0168] 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.

[0169] In a specific embodiment, Figure 4 and Figure 5 As shown, the first contact 131 and the second contact 132 are arranged in the form of a plug and a socket.

[0170] In some embodiments, when the first contact 131 is connected to the second contact 132 and the elastic contact piece 112 is in contact with the contact surface 122, the electrical circuit can be connected; when the first contact 131 is separated from the second contact 132 and the elastic contact piece 112 is not in contact with the contact surface 122, the electrical circuit is disconnected; when the first contact 131 is separated from the second contact 132 and the elastic contact piece 112 is in contact with the contact surface 122, the electrical circuit is disconnected; when the first contact 131 is connected to the second contact 132 and the elastic contact piece 112 is not in contact with the contact surface 122, the electrical circuit is disconnected.

[0171] 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.

[0172] Thereby, an electrical connector with an interlocking function can be formed, thereby further improving the protective effect of the connector.

[0173] In some embodiments, Figures 4 to 7 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 terminal 12 are disposed on the connector base 15 , and the first connection terminal 11 is separately disposed relative to the connector cover 14 .

[0174] In some embodiments, Figure 7As shown, the first contact 131 is disposed on one side of the connector cover 14 close to the connector base 15 along the first direction, and the second contact 132 and the second connection terminal 12 are both disposed on one side of the connector base 15 close to the connector cover 14 along the first direction. Further, the second contact 132 and the second connection terminal 12 can be arranged in a row along the second direction.

[0175] In some embodiments, the first connection terminal 11 is separately arranged relative to the connector cover 14. Optionally, the first connection terminal 11 and the connector cover 14 can be arranged along the second direction Y, or the connector cover 14 can have a notch, and the first connection terminal 11 can pass through the notch on the connector cover 14 to be electrically connected to the second connection terminal 12.

[0176] Thus, the first connecting terminal 11 and the second connecting terminal 12 can be turned on and off independently of the first contact 131 and the second contact 132. In this way, the connection between the first connecting terminal 11 and the second connecting terminal 12 can be disconnected first to put the electrical circuit into a power-off state, and then the connection between the first contact 131 and the second contact 132 can be disconnected in the power-off state. Therefore, compared with the case of disconnecting the connection between the first contact and the second contact in the power-on state, the risk of electric shock during operation is reduced.

[0177] In some embodiments, Figure 2 , Fig.12 and Fig.13 As shown, the battery device 100 further includes: a cover 106 connected to the box body 101 and enclosing the accommodating cavity S, and the first connecting terminal 11 is connected to the cover 106 .

[0178] In some embodiments, Figure 2 or Fig.13 As shown, the accommodating chamber S has an opening 103 , and a cover 106 is used to close the opening 103 .

[0179] 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.

[0180] In some specific embodiments, Figure 2 or Fig.13 As shown, the battery monomer components are concentrated in a certain space (e.g. Fig.13In the first accommodation 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 assembly, and the opening 103 exposes the second accommodation cavity S2.

[0181] In some embodiments, the first connection terminal 11 and the cover body can be directly connected or indirectly connected. The first connection terminal 11 and the cover body can be fixedly connected by bolts, rivets or glue. Fig. 9 or Fig.10 As shown, the outer circumferential surface of the cylindrical wall 1111 of the first connecting terminal 11 is provided with a mounting flange 1114 protruding radially outward, and the first connecting terminal 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 circumferential surface of the cylindrical wall 1111 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 connecting terminal 12 can be directly connected to the box body 101, or indirectly connected.

[0182] Thus, as the cover is separated from the box, the connection between the first connection terminal and the second connection terminal 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.

[0183] In some embodiments, the accommodating chamber S includes a first accommodating chamber S1 and a second accommodating chamber S2 , the battery cell assembly 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.

[0184] In some embodiments, the cover is used to close the first accommodating cavity S1 and the second accommodating cavity S2.

[0185] 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.

[0186] In some implementations, such as Figure 2 , Fig.12 and Fig.13 As shown, 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 terminal 11 is connected to the second cover body 105.

[0187] 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 terminal and the second connecting terminal is disconnected, so that the second accommodating cavity can be operated in the power-off state.

[0188] In some embodiments, the opening 103 of the second receiving chamber S2 is configured as a maintenance port for the battery device 100 .

[0189] This enables maintenance to be carried out in a power-off state.

[0190] 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.

[0191] 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.

[0192] In some embodiments, the electric device comprises an electric vehicle.

[0193] 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.

[0194] 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 an electrical appliance of the electric vehicle, and the second contact 132 is connected to a power supply circuit, when the first contact 131 and the second contact 132 are connected and the elastic contact piece 112 is in contact with the contact surface 122, 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 elastic contact piece 112 is not in contact with the contact surface 122, the electrical circuit is disconnected so that the battery device 100 does not provide electrical energy.

[0195] Therefore, when the first connection terminal and the second connection terminal are disconnected 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 and reduce the risk of electric shock.

[0196] The third aspect of the present application provides a connector 1 for controlling the on and off of an electrical circuit, the connector 1 comprising a first connection terminal 11 and a second connection terminal 12 for accessing the electrical circuit, the first connection terminal 11 having an elastic contact 112, the second connection terminal 12 having a contact surface 122, the elastic contact 112 being in contact with the contact surface 122 so that the first connection terminal 11 is electrically connected to the second connection terminal 12. The elastic contact 112 comprises a main body 1123 and an extension portion, the main body 1123 being connected to the extension portion and forming an angle, the angle changing under the action of the pushing force of the contact surface 122 on the extension portion, the elastic contact 112 being configured to be elastically deformable along a first direction X and elastically deformable along the contact surface 122, wherein the first direction X is perpendicular to the contact surface 122.

[0197] Since the first connecting terminal 11 and the second connecting terminal 12 are electrically connected through the contact between the elastic contact piece 112 and the contact surface 122, and the elastic contact piece can be elastically deformed in the first direction and can be elastically deformed along the contact surface, the electrical connection can be achieved through the connector 1 by simply making the elastic contact piece reliably contact the contact surface; moreover, the elastic contact piece 112 can be deformed in a direction perpendicular to the contact surface 122, so that it can absorb the assembly error in the first direction X, and can always be reliably in contact with the contact surface under the action of the deformation restoring force; the elastic contact piece can also be elastically deformed along the contact surface, thereby absorbing the assembly error along the direction of the contact surface, so that the elastic contact piece and the contact surface can always be in a state of reliable contact.

[0198] The embodiment of the present invention discloses a novel floating connection scheme, such as Figures 2 to 13 As shown, it includes a connector 1, and the connector 1 includes a first connection terminal 11, a second connection terminal 12 and a contact terminal 13. The contact terminal 13 realizes power connection, and the first connection terminal 11 and the second connection terminal 12 realize interlocking function through spring contact.

[0199] In some embodiments, a spring sheet is designed on the first connecting terminal 11, and the spring sheet has a first extension portion 1124 and a second extension portion 1125 arranged along the second direction Y. The first extension portion 1124 contacts the first contact surface 1221 of the second connecting terminal 12, and the second extension portion 1125 contacts the second contact surface 1222 of the second connecting terminal 12, thereby realizing electrical connection of the circuit.

[0200] In some embodiments, the size from the center to the edge of the first contact surface 1221 is greater than the assembly error of the system, and the size from the center to the edge of the second contact surface 1222 is greater than the assembly error of the system. The assembly error of the system can be 1mm to 40mm, the assembly error of the system can also be 2mm to 20mm, and the assembly error of the system can also be 2mm to 10mm. When there is an error in the system size, the spring sheet on the connector 1 moves on the contact surface of the second connection terminal 12, and always contacts the contact surface of the second connection terminal 12, thereby absorbing the assembly error.

[0201] In some embodiments, a spring is designed on the connector, and the spring can provide elastic force in a first direction, thereby ensuring that the spring sheet on the connector is in stable contact with the first contact surface and the second contact surface of the second connecting terminal.

[0202] 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 comprises a first connection terminal and a second connection terminal, wherein the first connection terminal has an elastic contact piece, and the second connection terminal has a contact surface, wherein the elastic contact piece contacts the contact surface so that the first connection terminal is electrically connected to the second connection terminal, and the on / off of the electrical circuit is controlled by connecting or disconnecting the first connection terminal and the second connection terminal. The elastic contact piece includes a main body and an extension portion, the main body is connected to the extension portion and forms an angle, the angle changes under the action of the pushing force of the contact surface on the extension portion, and the elastic contact piece is configured to be able to elastically deform in a first direction and along the contact surface, wherein the first direction is perpendicular to the contact surface.

2. The battery device according to claim 1, characterized in that: The extension portion includes a first extension portion and a second extension portion, The contact surface includes a first contact surface for contact with the first extension portion and a second contact surface for contact with the second extension portion, The main body is connected to the first extension and forms a first angle, and the first angle can be changed under the action of the pushing force of the first contact surface to the first extension; The main body is connected to the second extension portion and forms a second angle. The second angle can be changed under the action of the pushing force of the second contact surface on the second extension portion.

3. The battery device according to claim 2, characterized in that: The first extension portion and the second extension portion are symmetrically arranged on two sides of the main body portion.

4. The battery device according to claim 2, characterized in that: The first extension portion comprises a first extension section and a first folded section connected to each other, wherein the first folded section folds back from an end of the first extension section on a side away from the main body toward a side away from the first contact surface along the first direction. The second extension portion has a second extension section and a second folded section connected to each other, wherein the second folded section folds back from an end of the second extension section on a side away from the main body toward a side away from the second contact surface along the first direction. A connection portion between the first extending section and the first folded section can contact the first contact surface, and a connection portion between the second extending section and the second folded section can contact the second contact surface.

5. The battery device according to claim 4, characterized in that: A connection portion between the first extension segment and the first return segment is formed in an arc shape, and a connection portion between the second extension segment and the second return segment is formed in an arc shape.

6. The battery device according to claim 5, characterized in that: A first raised portion is formed at a connection portion between the first extension section and the first folded section, and a raised surface of the first raised portion is formed in an arc shape; A second raised portion is formed at a connection portion between the second extension section and the second folded section, and a raised surface of the second raised portion is formed in an arc shape; The raised surface of the first raised portion contacts the first contact surface, and the raised surface of the second raised portion contacts the second contact surface.

7. The battery device according to claim 1, characterized in that: The first connecting terminal includes a first plug-in portion and the elastic contact piece connected to the first plug-in portion, the second connecting terminal includes a second plug-in portion and a contact plate arranged on the second plug-in portion, the contact plate has the contact surface, and one of the first plug-in portion and the second plug-in portion is at least partially inserted into the other of the first plug-in portion and the second plug-in portion.

8. The battery device according to claim 7, characterized in that: The first connecting terminal further includes an elastic pressing portion, and the elastic contact piece is connected to the first plug-in portion via the elastic pressing portion.

9. The battery device according to claim 8, characterized in that: The elastic pressing part includes a spring member and a floating member. The spring member is connected between the first plug-in portion and the floating member and is in a compressed state at least when the elastic contact member is in contact with the contact surface. The floating member is installed to be able to float relative to the first plug-in portion along the first direction, and the elastic contact member is connected to a side of the floating member that is away from the spring member along the first direction.

10. The battery device according to claim 9, characterized in that: The first plug-in portion has a cylindrical wall and an end wall connected to one end of the cylindrical wall, and the elastic pressing portion is located in a space surrounded by the cylindrical wall. The inner circumferential surface of the cylindrical wall is provided with a first protrusion protruding radially inward, and the outer circumferential surface of the floating member is provided with a second protrusion protruding radially outward. The floating member is installed so that the second protrusion is located between the first protrusion and the end wall and the first protrusion and the second protrusion block each other in the first direction.

11. The battery device according to claim 7, characterized in that: The second connection terminal also has an electrical connection portion connected to the contact plate, and the electrical connection portion is used to access the electrical circuit and / or the electrical circuit control circuit.

12. The battery device according to claim 11, 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 elastic contact piece is in contact with the contact surface, the electrical circuit can be connected; when the first contact is separated from the second contact and / or the elastic contact piece is not in contact with the contact surface, the electrical circuit is disconnected.

13. The battery device according to claim 12, characterized in that: The connector further comprises a connector cover and a connector base, the first contact is arranged on the connector cover, the second contact and the second connection terminal are arranged on the connector base, and the first connection terminal is separately arranged relative to the connector cover.

14. 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 terminal is connected to the cover body.

15. The battery device according to claim 14, 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.

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 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 terminal is connected to the second cover body.

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

18. An electrical device, characterized in that: A battery device comprising any one of claims 1 to 17, wherein the battery device is used to store or provide electrical energy.

19. A connector for controlling the on / off of an electrical circuit, characterized in that: The connector includes a first connection terminal and a second connection terminal for connecting to the electrical circuit, the first connection terminal has an elastic contact piece, the second connection terminal has a contact surface, the elastic contact piece contacts the contact surface so that the first connection terminal is electrically connected to the second connection terminal, and the electrical circuit is controlled by connecting or disconnecting the first connection terminal and the second connection terminal. The elastic contact member includes a main body and an extension portion, wherein the main body is connected to the extension portion and forms an angle, and the angle changes under the action of the pushing force of the contact surface against the extension portion. The elastic contact member is configured to be elastically deformable along a first direction and along the contact surface, wherein the first direction is perpendicular to the contact surface.

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