Battery monomer, battery device, power utilization device and energy storage device

Abstract

The utility model provides a battery monomer, a battery device, a power utilization device and an energy storage device. The battery cell includes: a housing having an accommodation space, the housing including a first housing wall; the electrode assembly is at least partially arranged in the accommodating space; a first electrode terminal connected to the electrode assembly and having a first terminal plate; a second electrode terminal connected to the electrode assembly and having a second terminal plate; the first insulating part is arranged on the first shell wall, and the first terminal plate and the second terminal plate are arranged on the side, away from the containing space, of the first shell wall; a portion of the first insulator is disposed between the first terminal plate and the first housing wall and between the second terminal plate and the first housing wall in a wall thickness direction of the first housing wall. Thus, provided are a battery cell, a battery device, an electric device, and an energy storage device, each of which has a high electrode terminal bending strength.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to battery cells, battery devices, power-consuming devices, and energy storage devices. Background Art

[0002] With the promotion and popularization of the green development concept, new energy batteries are being used more and more widely in life and industry. For example, new energy vehicles equipped with batteries have been widely used. In addition, batteries are also being increasingly used in energy storage fields.

[0003] In existing battery systems, a battery cell typically consists of a casing, electrode terminals, and an insulator. However, the electrode terminals are susceptible to deformation or breakage. Therefore, improving the strength of the electrode terminals is a key area of ​​research in the industry. Utility Model Content

[0004] In order to solve the above technical problems, the present application provides a battery cell, a battery device, an electrical device and an energy storage device capable of improving the strength of electrode terminals.

[0005] In a first aspect, an embodiment of the present application provides a battery cell, comprising: a shell having a accommodating space, the shell comprising a first shell wall; an electrode assembly, at least partially disposed in the accommodating space; a first electrode terminal, connected to the electrode assembly and having a first terminal plate; a second electrode terminal, connected to the electrode assembly and having a second terminal plate; a first insulating member, disposed on the first shell wall, wherein the first terminal plate and the second terminal plate are disposed on a side of the first shell wall facing away from the accommodating space; along the wall thickness direction of the first shell wall, a portion of the first insulating member is disposed between the first terminal plate and the first shell wall and between the second terminal plate and the first shell wall.

[0006] Due to the above arrangement, when one electrode terminal is subjected to external force or torque, the first insulating member can transfer the force acting on this electrode terminal to the other electrode terminal, and the two electrode terminals jointly resist the external force or torque, which can enhance the deformation resistance of the electrode terminal. Moreover, a part of the first insulating member is located between the first terminal plate and the first shell wall and between the second terminal plate and the first shell wall, which can insulate the first terminal plate and the second terminal plate from the first shell wall, make the shell non-electrical and simplify the number of components.

[0007] In some embodiments, the first insulating member includes a connected insulating bottom wall and a first abutting wall; the insulating bottom wall is arranged between the first terminal plate and the first shell wall and between the second terminal plate and the first shell wall; along the wall thickness direction of the first shell wall, at least part of the first terminal plate and / or at least part of the second terminal plate is arranged between the first abutting wall and the insulating bottom wall.

[0008] Due to the above arrangement, when one electrode terminal is pulled or squeezed in the wall thickness direction, the first insulating member can transfer the force acting on this electrode terminal to the other electrode terminal. By jointly resisting the external force, the deformation resistance of the electrode terminal can be enhanced.

[0009] In some embodiments, the first insulating member is fixed to the first terminal plate and the second terminal plate, and the first abutting wall abuts against at least a portion of the first terminal plate and / or at least a portion of the second terminal plate.

[0010] Since the first abutting wall abuts against at least part of the first terminal plate and / or at least part of the second terminal plate, when one electrode terminal is pulled or squeezed, the first insulating member can better transfer the force acting on this electrode terminal to the other electrode terminal, thereby further enhancing the electrode terminal's anti-deformation ability.

[0011] In some embodiments, the electrode assembly includes a first electrode piece and a second electrode piece with opposite polarities, the first electrode terminal is electrically connected to the first electrode piece, and the second electrode terminal is electrically connected to the second electrode piece.

[0012] Therefore, when the first electrode terminal and the second electrode terminal have opposite polarities, the two electrode terminals can be well insulated from each other and from the housing, and the deformation resistance and strength of the electrode terminals can be improved.

[0013] In some embodiments, along the wall thickness direction of the first shell wall, the projection portions of the first abutting wall, the first terminal plate, and the insulating bottom wall in the same projection plane overlap, and the projection portions of the first abutting wall, the second terminal plate, and the insulating bottom wall in the same projection plane overlap.

[0014] Therefore, both the first terminal plate and the second terminal plate can suppress deformation in the wall thickness direction through the first abutment wall. Therefore, when the first electrode terminal is subjected to a pulling force in the wall thickness direction, the force exerted on the first electrode terminal can be better transferred to the second electrode terminal, and when the second electrode terminal is subjected to a pulling force in the wall thickness direction, the force exerted on the second electrode terminal can be better transferred to the first electrode terminal, further enhancing the deformation resistance of the electrode terminal.

[0015] In some embodiments, the first abutment wall is connected to the insulating bottom wall through a first connecting wall, and the first connecting wall extends along the wall thickness direction; along a direction perpendicular to the wall thickness direction, the first connecting wall is located between the first terminal plate and the second terminal plate.

[0016] The first connecting wall, positioned between the first and second terminal plates, increases the creepage distance between the first and second electrode terminals, improving insulation reliability. Furthermore, the blocking effect of the first connecting wall strengthens the first and second electrode terminals in a direction perpendicular to the thickness of the first housing wall, reducing the likelihood of displacement or deformation of the first and second electrode terminals due to external forces.

[0017] In some embodiments, the first insulating member also includes at least one second abutting wall connected to the insulating bottom wall, and along the wall thickness direction of the first shell wall, the projections of the second abutting wall, the first terminal plate, and the insulating bottom wall in the same projection plane partially overlap, and / or, along the wall thickness direction of the first shell wall, the projections of the second abutting wall, the second terminal plate, and the insulating bottom wall in the same projection plane partially overlap.

[0018] Due to the above arrangement, not only can external force be transmitted through the first insulating member, thereby the two electrode terminals jointly resist the external force, but the added second abutment wall can further enhance the limiting force on the electrode terminal in the wall thickness direction, thereby further enhancing the electrode terminal's ability to resist deformation.

[0019] In some embodiments, the first insulating member also includes a second abutting wall connected to the insulating bottom wall, and along the wall thickness direction of the first shell wall, the projections of the first abutting wall, the first terminal plate, and the insulating bottom wall in the same projection plane overlap, and the projections of the second abutting wall, the second terminal plate, and the insulating bottom wall in the same projection plane overlap.

[0020] Due to the above arrangement, not only can external force be transmitted through the first insulating member, thereby the two electrode terminals jointly resist the external force, but the first abutment wall and the second abutment wall can respectively limit the deformation of the electrode terminal in the wall thickness direction, thereby further enhancing the electrode terminal's anti-deformation ability.

[0021] In some embodiments, the first abutment wall is connected to the insulating bottom wall through a first connecting wall, and the second abutment wall is connected to the insulating bottom wall through a second connecting wall; the first connecting wall and the second connecting wall extend along the wall thickness direction respectively; along the direction perpendicular to the wall thickness direction, the first connecting wall and the second connecting wall are both located between the first terminal plate and the second terminal plate.

[0022] The first and second connecting walls are both located between the first and second terminal plates, increasing the creepage distance between the first and second electrode terminals and improving insulation reliability. Furthermore, the blocking effect of the two connecting walls on the two electrode terminals enhances the strength of the first and second electrode terminals in a direction perpendicular to the thickness of the first housing wall, reducing the probability of displacement or deformation of the first and second electrode terminals due to external forces.

[0023] In some embodiments, the first abutment wall is connected to the insulating bottom wall through a first connecting wall, and the second abutment wall is connected to the insulating bottom wall through a second connecting wall; the first connecting wall and the second connecting wall extend along the wall thickness direction respectively; along the direction perpendicular to the wall thickness direction, at least one of the first terminal plate and the second terminal plate is located between the first connecting wall and the second connecting wall.

[0024] This can improve the degree of freedom in the installation positions of the connecting wall and the abutting wall.

[0025] In some embodiments, the first electrode terminal further includes a first terminal disc, at least a portion of which is disposed on a side of the first shell wall facing the accommodation space, and the second electrode terminal further includes a second terminal disc, at least a portion of which is disposed on a side of the first shell wall facing the accommodation space, and a second insulating member is further provided between the first terminal disc and the first shell wall and between the second terminal disc and the first shell wall along the wall thickness direction of the first shell wall.

[0026] Because the electrode terminals include a terminal plate located outside the battery cell housing and a terminal disc located inside the housing, the electrode terminals can be easily connected to the electrode lugs of the electrode assembly via the terminal disc. Furthermore, the terminal plate can be designed larger to improve heat dissipation, support for the first housing wall, and connection strength to the busbar. This allows for greater freedom in the design of the shapes of the terminal plate and the terminal disc. Furthermore, the terminal plate and the terminal disc each clamp the first housing wall from both the inside and outside of the housing, thereby increasing the bending strength of the first housing wall.

[0027] In some embodiments, the first terminal plate is provided with a first recessed portion, the second terminal plate is provided with a second recessed portion, the first abutting wall at least partially overlaps with the first recessed portion and the second recessed portion along the wall thickness direction of the first shell wall, and at least a portion of the first abutting wall cooperates with the first recessed portion and the second recessed portion.

[0028] Therefore, by cooperating with the first abutting wall and the first recessed portion and the second recessed portion, it is convenient to realize the transmission of force along the wall thickness direction and force perpendicular to the wall thickness direction between the first electrode terminal and the second electrode terminal, which is beneficial to improving the strength of the first electrode terminal and / or the second electrode terminal; by cooperating with the first abutting wall and the first recessed portion and the second recessed portion to reduce the space occupied by the first abutting wall, the space utilization rate is improved, and the rapid alignment between the two electrode terminals and the first insulating member is facilitated.

[0029] In some embodiments, the first terminal plate is provided with a first recessed portion, the second terminal plate is provided with a second recessed portion, the first abutting wall at least partially overlaps with the first recessed portion and the second recessed portion along the wall thickness direction of the first shell wall, and at least a portion of the first abutting wall cooperates with the first recessed portion and the second recessed portion; the first terminal plate or the second terminal plate is also provided with a third recessed portion, the second abutting wall at least partially overlaps with the third recessed portion along the wall thickness direction of the first shell wall, and at least a portion of the second abutting wall cooperates with the third recessed portion.

[0030] Therefore, by cooperating the first abutting wall with the first recessed portion and the second recessed portion, and by cooperating the second abutting wall with the third recessed portion, the force along the wall thickness direction and the force perpendicular to the wall thickness direction between the first electrode terminal and the second electrode terminal can be better transmitted, which is beneficial to improving the strength of the first electrode terminal and / or the second electrode terminal; by cooperating the first abutting wall with the first recessed portion and the second recessed portion, and by cooperating the second abutting wall with the third recessed portion to reduce the space occupied by the first abutting wall and the second abutting wall, the space utilization rate is improved, and it is convenient for the two electrode terminals to be quickly aligned with the first insulating member.

[0031] In some embodiments, the first terminal plate is provided with a first recessed portion, the second terminal plate is provided with a second recessed portion, the first abutting wall and the first recessed portion at least partially overlap along the wall thickness direction of the first shell wall, the second abutting wall and the second recessed portion at least partially overlap along the wall thickness direction of the first shell wall, at least a portion of the first abutting wall cooperates with the first recessed portion, and at least a portion of the second abutting wall cooperates with the second recessed portion.

[0032] Therefore, by cooperating with the first abutting wall and the first recessed portion, the second abutting wall and the second recessed portion, it is convenient to realize the transmission of force along the wall thickness direction and the force perpendicular to the wall thickness direction between the first electrode terminal and the second electrode terminal, which is beneficial to improving the strength of the first electrode terminal and / or the second electrode terminal; by cooperating with the first abutting wall, the second abutting wall and the second recessed portion to reduce the space occupied by the first abutting wall and the second abutting wall, the space utilization is improved, and the rapid alignment between the two electrode terminals and the first insulating member is facilitated.

[0033] In some embodiments, the first recessed portion includes a first step portion and a second step portion, the second recessed portion includes a third step portion and a fourth step portion, the second step portion is arranged on a side of the first step portion away from the second recessed portion, and the fourth step portion is arranged on a side of the third step portion away from the first recessed portion; the first abutment wall is at least partially accommodated in the step space formed by the first step portion and the third step portion.

[0034] Therefore, by cooperating with the first abutting wall and the first step portion and the second step portion, the force transmission along the wall thickness direction between the first electrode terminal and the second electrode terminal is better realized, thereby improving the strength of the first electrode terminal and the second electrode terminal; by cooperating with the first abutting wall and the first step portion and the second step portion, the space occupied by the first abutting wall is reduced, thereby improving the space utilization rate.

[0035] In some embodiments, along the wall thickness direction of the first shell wall, the surface of the first abutting wall on the side facing away from the first shell wall does not exceed the surface of the first terminal plate on the side facing away from the shell wall; and / or, along the wall thickness direction of the first shell wall, the surface of the first abutting wall on the side facing away from the first shell wall does not exceed the surface of the second terminal plate on the side facing away from the first shell wall.

[0036] Thus, the space occupied by the first abutting wall can be reduced, space utilization can be improved, and the influence of the first abutting wall on the connection between the electrode terminal and the busbar can be reduced.

[0037] In some embodiments, along the wall thickness direction of the first shell wall, the surface of the second abutting wall on the side facing away from the first shell wall does not exceed the surface of the first terminal plate on the side facing away from the shell wall; and / or, along the wall thickness direction of the first shell wall, the surface of the second abutting wall on the side facing away from the first shell wall does not exceed the surface of the second terminal plate on the side facing away from the first shell wall.

[0038] Thus, the space occupied by the second abutting wall can be reduced, space utilization can be improved, and the influence of the second abutting wall on the connection between the electrode terminal and the busbar can be reduced.

[0039] In some embodiments, along the wall thickness direction of the first shell wall, the surface of the first abutting wall on the side facing away from the first shell wall does not exceed the surface of the first terminal plate on the side facing away from the shell wall; and / or, along the wall thickness direction of the first shell wall, the surface of the first abutting wall on the side facing away from the first shell wall does not exceed the surface of the second terminal plate on the side facing away from the first shell wall.

[0040] Thus, the space occupied by the first abutting wall and the second abutting wall can be reduced, space utilization can be improved, and the influence of the first abutting wall and the second abutting wall on the connection between the electrode terminal and the busbar can be reduced.

[0041] In some embodiments, the first insulating member is an integrally formed member.

[0042] It is beneficial to reduce the number of parts, improve assembly efficiency and reduce production costs.

[0043] In some embodiments, the first insulating member, the first terminal plate, and the second terminal plate are integrally injection molded.

[0044] It is beneficial to reduce the number of parts, improve assembly efficiency and reduce production costs.

[0045] In some embodiments, along the wall thickness direction of the first shell wall, the thickness of the first abutting wall is not less than 0.4 mm.

[0046] This can improve the strength of the first abutting wall portion, preventing cracks from forming on the first abutting wall portion when the electrode terminals are subjected to excessive force, thereby better transmitting the force acting on one electrode terminal to the other electrode terminal.

[0047] In some embodiments, along the wall thickness direction of the first shell wall, the thickness of the second abutting wall is not less than 0.4 mm.

[0048] This can improve the strength of the second abutting wall portion, preventing cracks from forming on the second abutting wall portion when the electrode terminals are subjected to excessive force, thereby better transmitting the force acting on one electrode terminal to the other electrode terminal.

[0049] In some embodiments, the first terminal plate includes a first main body and a first extension portion connected to each other, and the second terminal plate includes a second main body and a second extension portion connected to each other, along a first direction, at least a portion of the first extension portion and at least a portion of the second extension portion are located between the first main body and the second main body, and the first extension portion and the second extension portion are arranged along a second direction, wherein the first direction and the second direction are perpendicular to each other and are both perpendicular to the wall thickness direction of the first shell wall.

[0050] Thus, by arranging the first and second extensions to overlap in the second direction, the synergistic effect of the two electrode terminals can be utilized to improve the bending strength of the region of the first housing wall where the electrode terminals are located. Furthermore, the first and second electrode terminals can be arranged as compactly as possible, facilitating the utilization of the non-electrode terminal-arranged region of the first housing wall, thereby improving the volume utilization of the battery pack.

[0051] In some embodiments, along the second direction, the first extension portion and the second extension portion have an overlapping portion.

[0052] Thus, by arranging the first and second extensions to overlap in the second direction, the synergistic effect of the two electrode terminals can be utilized to improve the bending strength of the region of the first housing wall where the electrode terminals are located. Furthermore, the first and second electrode terminals can be arranged as compactly as possible, facilitating the utilization of the non-electrode terminal-arranged region of the first housing wall, thereby improving the volume utilization of the battery pack.

[0053] In some embodiments, the first electrode terminal further includes a first terminal disc, at least a portion of which is disposed on a side of the first shell wall facing the accommodation space, and the second electrode terminal further includes a second terminal disc, at least a portion of which is disposed on a side of the first shell wall facing the accommodation space, the first main body and the first terminal disc are directly connected via a first connecting column; the second main body and the second terminal disc are directly connected via a second connecting column.

[0054] Since the terminal plate and the terminal disk can be connected together by the connecting post, they can function as electrode terminals to draw current from the electrode assembly. Moreover, the connecting post is provided on the main body, so that the electrode terminal can be reliably fixed to the first housing wall on the main body.

[0055] In some embodiments, a portion of the first main portion and a portion of the second extension portion are disposed between the first abutting wall and the insulating bottom wall.

[0056] Thus, the first and second electrode terminals can achieve mutual force transmission via the first main body and the second extension. In particular, by blocking the main body and the extension with the first abutment wall, external forces or moments acting on the easily deformable extension can be quickly transmitted to the less easily deformed main body, thereby jointly resisting external forces or moments and improving the overall strength of the electrode terminal.

[0057] In some embodiments, a portion of the second main body portion and a portion of the first extension portion are disposed between the first abutting wall and the insulating bottom wall.

[0058] Thus, the first and second electrode terminals can achieve mutual force transmission through the second main body and the first extension. In particular, the first abutment wall blocks the main body and the extension, allowing external forces or moments applied to the easily deformable extension to be quickly transferred to the less easily deformed main body, thereby jointly resisting external forces or moments and improving the overall strength of the electrode terminal.

[0059] In some embodiments, a portion of the first extension portion and a portion of the second extension portion are disposed between the first abutting wall and the insulating bottom wall.

[0060] Thus, the first and second electrode terminals can achieve mutual force transmission via the second extension portion and the first extension portion. In particular, by blocking the first and second extension portions with the first abutting wall, external forces or moments acting on the easily deformable extension portion can be quickly transmitted to the other electrode terminal, thereby jointly resisting external forces or moments and improving the overall strength of the electrode terminals.

[0061] In some embodiments, the first insulating member also includes at least one second abutting wall connected to the insulating bottom wall, and along the wall thickness direction of the first shell wall, the projections of the second abutting wall, the first main body, and the insulating bottom wall in the same projection plane partially overlap; and / or, along the wall thickness direction of the first shell wall, the projections of the second abutting wall, the first extension, and the insulating bottom wall in the same projection plane partially overlap; and / or, along the wall thickness direction of the first shell wall, the projections of the second abutting wall, the second main body, and the insulating bottom wall in the same projection plane partially overlap; and / or, along the wall thickness direction of the first shell wall, the projections of the second abutting wall, the second extension, and the insulating bottom wall in the same projection plane partially overlap.

[0062] By adding the second abutting wall, the first and second electrode terminals can better transmit force in the wall thickness direction, further enhancing the bending strength of the first and second electrode terminals. Moreover, the above arrangement is flexible, increasing the freedom of the second abutting wall's location.

[0063] In some embodiments, the first extension portion is offset relative to the center position of the first main body portion along the width direction of the first shell wall; and / or the second extension portion is offset relative to the center position of the second main body portion along the width direction of the first shell wall.

[0064] Thus, the dimension of the first housing wall along the second direction can be fully utilized to arrange the first extension portion and the second extension portion along the width direction of the second direction, which is beneficial for compactly arranging the first electrode terminal and the second electrode terminal.

[0065] A second aspect of the present application provides a battery device, comprising a housing and at least two battery cells provided by the first aspect.

[0066] This can improve the bending strength of the electrode terminal, simplify the number of parts, and reduce production costs.

[0067] In some embodiments, at least one box wall of the box body has a boss, which is formed by the box wall bulging in a direction away from the battery cell, and the boss forms a receiving portion on the side facing the battery cell. Along the direction perpendicular to the box wall on which the boss is formed, the projections of the first electrode terminal, the second electrode terminal and the first insulating member do not exceed the projection of the boss, and the first electrode terminal, the second electrode terminal and the first insulating member are at least partially received in the receiving portion.

[0068] Thus, only the height of the box body where the first electrode terminal and the second electrode terminal are located can be increased, thereby reducing the size of the battery device and facilitating improved volume utilization of the battery device.

[0069] A third aspect of the present application provides an electrical device, which includes a plurality of battery cells provided in the first aspect or a battery device provided in the second aspect, wherein the battery cells or the battery device are used to store or provide electrical energy.

[0070] Thus, an electrical device equipped with a battery whose electrode terminals are not easily bent or deformed to a small extent can be provided, thereby improving the reliability of the electrical device and reducing the maintenance time of the electrical device.

[0071] A fourth aspect of the present application provides an energy storage device, which includes a plurality of battery cells provided in the first aspect or a battery device provided in the second aspect, wherein the battery cells or the battery device are used to store or provide electrical energy.

[0072] Thus, an energy storage device using a battery cell whose electrode terminals are not susceptible to bending deformation or have a small degree of bending deformation can be provided, thereby improving the reliability of the energy storage device and reducing the maintenance time of the energy storage device.

[0073] The beneficial effects of the embodiments of the present application include: improving the deformation resistance of the electrode terminal along the wall thickness direction, and improving the strength of the electrode terminal.

[0074] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0075] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference numerals are used throughout the drawings to denote the same components. In the drawings:

[0076] Figure 1 A schematic structural diagram of a vehicle provided for some embodiments of the present application;

[0077] Figure 2 A schematic structural diagram of an energy storage device provided in some embodiments of the present application;

[0078] Figure 3 A schematic exploded perspective view of a battery device provided in some embodiments of the present application;

[0079] Figure 4 A schematic perspective view of a battery cell provided in some embodiments of the present application;

[0080] Figure 5 A schematic diagram of the internal structure of a battery device provided in some embodiments of the present application;

[0081] Figure 6 A schematic top view of a first housing wall provided for some embodiments of the present application;

[0082] Figure 7 Some embodiments of the present application provide Figure 6 AA cross-sectional diagram;

[0083] Figure 8 Some embodiments of the present application provide Figure 7 A local enlarged schematic diagram of the A1 area;

[0084] Figure 9 Some embodiments of the present application provide Figure 7 A local enlarged schematic diagram of the A2 area;

[0085] Figure 10 A schematic structural diagram of a first housing wall provided for other embodiments of the present application;

[0086] Figure 11 Some embodiments of the present application provide Figure 10 BB cross-sectional diagram;

[0087] Figure 12 Some embodiments of the present application provide Figure 10 Schematic diagram of CC cross section;

[0088] Figure 13 Some embodiments of the present application provide Figure 10DD cross-sectional diagram;

[0089] Figure 14 An exploded schematic diagram of a first housing wall provided for some embodiments of the present application;

[0090] Figure 15 A schematic cross-sectional view of a battery device with a boss provided in one embodiment of the present application;

[0091] Figure 16 An exploded schematic diagram of a first terminal plate, a second terminal plate, and a first insulating member provided for some embodiments of the present application.

[0092] Description of Reference Numerals

[0093] 1000 Vehicle; 2000 Energy storage device; 100 Battery device; 200 Controller; 300 Motor; 400 Master control module; 10 Battery cell; 20 Housing; 20A First housing; 20B Second housing; 1 Housing; 11 First housing wall; 12 Accommodation space; 13 First electrode terminal; 131 First terminal plate; 132 First terminal disk; 14 Second electrode terminal; 141 Second terminal plate; 142 Second terminal disk; 15 First insulating member; 151 First abutting wall; 152 Insulating bottom wall; 153 First connecting wall; 154 Second Abutment wall; 155 second connecting wall; 171 first recessed portion; 1711 first step portion; 1712 second step portion; 172 second recessed portion; 1721 third step portion; 1722 fourth step portion; 173 third recessed portion; 2 electrode assembly; 21 first pole tab; 22 second pole tab; 3 busbar; 41 first main body; 51 first extension portion; 42 second main body; 52 second extension portion; 61 first connecting column; 62 second connecting column; 111a boss; 111b accommodating portion; X wall thickness direction; Y first direction; Z second direction. DETAILED DESCRIPTION

[0094] It should be noted that, unless there is a conflict, the embodiments and technical features in the embodiments of this application can be combined with each other, and the detailed description in the specific implementation method should be understood as an explanation of the purpose of this application and should not be regarded as an improper restriction on this application.

[0095] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art 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 the specification of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions.

[0096] In the description of this application, technical terms such as "first," "second," "third," and "fourth" are used solely to distinguish different objects and should not be understood to indicate or imply relative importance or to implicitly indicate the quantity, specific order, or primary and secondary relationship of the technical features indicated. In the description of this application, "plurality" means more than two, unless otherwise specifically defined.

[0097] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0098] In the description of this application, the term "and / or" is simply a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0099] In the description of the embodiments of the present application, the orientations or positional relationships 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 orientations or positional relationships 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 device or element referred to 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.

[0100] In the description of this application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0101] In the description of this application, unless otherwise clearly specified and limited, the technical term "contact" should be understood in a broad sense, and can be direct contact, contact through an intermediate medium layer, contact with essentially no interaction force between the two contacting parties, or contact with interaction force between the two contacting parties.

[0102] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the technical terms "parallel" and "perpendicular" are allowed to have a certain degree of tolerance and / or error, including the situations of being approximately parallel and approximately perpendicular.

[0103] Below, this application is described in detail.

[0104] With the promotion and popularization of the green development concept, new energy batteries are being used more and more widely in life and industry. For example, new energy vehicles equipped with batteries have been widely used. In addition, battery devices are also increasingly used in energy storage fields.

[0105] In existing battery systems, battery cells usually include a casing, electrode terminals, and insulating parts, but the electrode terminals are prone to deformation or breakage. In related technologies, there are too many parts on the casing, which makes the assembly process inefficient and not conducive to cost reduction. Moreover, the electrode terminals are connected to the shell wall or top cover in the casing of the battery cell, which is prone to extrusion deformation. In addition, since the busbar is connected to the electrode terminal, there is a situation where the busbar pulls the electrode terminal due to battery vibration and other reasons, which sometimes causes the electrode terminal to deform or break. Therefore, how to improve the deformation resistance of the electrode terminal while simplifying the parts on the casing is one of the research directions in the industry.

[0106] Research has shown that when one electrode terminal is pulled or squeezed, transferring the force or torque acting on it to another electrode terminal can enhance its resistance to deformation. Using insulating components to conduct the forces between different electrode terminals can reduce the number of parts and improve assembly efficiency.

[0107] Based on such a technical concept, the present application provides a battery cell, which includes a shell having a accommodating space, the shell including a first shell wall; an electrode assembly, at least partially arranged in the accommodating space; a first electrode terminal, connected to the electrode assembly, and having a first terminal plate; a second electrode terminal, connected to the electrode assembly, and having a second terminal plate; a first insulating member, arranged on the first shell wall, wherein the first terminal plate and the second terminal plate are arranged on the side of the first shell wall away from the accommodating space; along the wall thickness direction of the first shell wall, a portion of the first insulating member is arranged between the first terminal plate and the first shell wall and between the second terminal plate and the first shell wall.

[0108] Therefore, when one electrode terminal is subjected to external force or torque, the first insulating member can transfer the force acting on this electrode terminal to the other electrode terminal, and the two electrode terminals jointly resist the external force or torque, which can enhance the electrode terminal's anti-deformation ability. Moreover, a part of the first insulating member is located between the first terminal plate and the first shell wall and between the second terminal plate and the first shell wall, which can insulate the first terminal plate and the second terminal plate from the first shell wall, make the shell non-electrical and simplify the number of components.

[0109] In the embodiment of the present application, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0110] The battery cells may be lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-hydrogen batteries, nickel-cadmium batteries, lead-acid batteries, etc., which are not limited in the embodiments of the present disclosure.

[0111] The technical solutions described in the embodiments of the present application are applicable to various electrical devices that use battery cells or battery devices, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, etc. For example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.

[0112] The technical solutions described in the embodiments of the present application are also applicable to energy storage devices. Energy storage devices can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems. Energy storage devices can store electrical energy as needed and output electrical energy at appropriate times. For example, an energy storage device can store electrical energy during low electricity consumption periods and provide electrical energy to relevant users or electrical equipment during peak electricity consumption periods. The energy storage system provided in the embodiments of the present application can be any power system that requires an energy storage device.

[0113] For the convenience of explanation, the electric device of some embodiments of the present application is taken as an example of a vehicle 1000. The following description is made with reference to the accompanying drawings.

[0114] Figure 1 This is a schematic diagram of the structure of a vehicle provided in some embodiments of the present application. Vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended range vehicle. Figure 1As shown, a battery device 100 is installed inside vehicle 1000. Battery device 100 can be installed at the bottom, front, or rear of vehicle 1000. Battery device 100 can be used to power vehicle 1000. For example, battery device 100 can serve as an operating power source for vehicle 1000. Vehicle 1000 can also include a controller 200 and a motor 300. Controller 200 is used to control battery device 100 to power motor 300, for example, to meet the power requirements of vehicle 1000 during startup, navigation, and driving.

[0115] In some embodiments of the present application, the battery device 100 can serve not only as an operating power source for the vehicle 1000 , but also 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 .

[0116] Figure 2 A schematic diagram of the structure of an energy storage device 2000 provided in some embodiments of the present application. Energy storage device 2000 includes one or more battery clusters to increase the voltage and capacity of the energy storage device. A battery cluster may include multiple battery devices 100, which are connected in series via a busbar to increase the voltage of the energy storage device. When the energy storage device includes multiple battery clusters, the battery clusters are connected in parallel to increase the capacity of the energy storage device.

[0117] In some embodiments, the energy storage device 2000 is an energy storage container or an energy storage cabinet.

[0118] In some embodiments, the energy storage device may include a cabinet and one or more battery clusters housed in the cabinet.

[0119] In some embodiments, the energy storage device may include modules such as a thermal management module, a main control module, a master control module 400 , a power distribution module, and a fire protection module.

[0120] Figure 3 This is a schematic diagram of a three-dimensional exploded view of a battery device provided in some embodiments of the present application. Figure 3 As shown, battery device 100 includes a housing 20, which may include a first housing 20A and a second housing 20B. The first housing 20A and the second housing 20B engage to form an enclosed space within housing 20 for accommodating battery cell assemblies. Enclosed here means covered or closed, and can be either sealed or unsealed. The first housing 20A can be a top cover or a bottom plate.

[0121] As an example, the box may include a top cover, a frame, and a bottom plate, wherein the top cover and the bottom plate are respectively connected to the frame to form a closed space inside the box to accommodate the battery cell assembly.

[0122] As an example, the box body can be used as a part of the chassis structure of the vehicle. For example, the top cover of the box body can become at least a part of the floor of the vehicle, or the frame of the box body can become at least a part of the crossbeam and longitudinal beam of the vehicle.

[0123] The battery apparatus mentioned in the embodiments of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include multiple battery cells, which are connected to each other through a busbar ( Figure 3 (not shown) connected in series, parallel or mixed.

[0124] In some embodiments, a battery cell assembly is generally formed by arranging a plurality of battery cells.

[0125] As an example, the battery cell assembly may be a battery module, which is formed by arranging and fixing multiple battery cells to form an independent module. As an example, the battery module may be formed by bundling multiple battery cells with a cable tie.

[0126] 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 housed in the case.

[0127] 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.

[0128] As an example, the battery cell assembly may also be housed in the box by directly fixing the plurality of battery cells to the box.

[0129] Next, combine Figures 4 to 16 Some embodiments of the present application are described in detail.

[0130] Figure 4 A schematic perspective view of a battery cell 10 provided in some embodiments of the present application; Figure 5 A schematic diagram of the internal structure of a battery device 100 provided in some embodiments of the present application; Figure 6 A schematic top view of the first housing wall 11 provided for some embodiments of the present application; Figure 7 Some embodiments of the present application provide Figure 6 AA cross-sectional diagram; Figure 8 Some embodiments of the present application provide Figure 7 A local enlarged schematic diagram of the A1 area; Figure 9 Some embodiments of the present application provide Figure 7 A local enlarged schematic diagram of the A2 area; Figure 10 A schematic structural diagram of the first housing wall 11 provided in some other embodiments of the present application;

[0131] Figure 11 Some embodiments of the present application provide Figure 10 BB cross-sectional diagram; Figure 12 Some embodiments of the present application provide Figure 10 Schematic diagram of CC cross section; Figure 13 Some embodiments of the present application provide Figure 10 DD cross-sectional diagram; Figure 14 An exploded schematic diagram of the first housing wall 11 provided for some embodiments of the present application; Figure 15 A schematic cross-sectional view of a battery device 100 with a boss provided in one embodiment of the present application; Figure 16 An exploded schematic diagram of the first terminal plate 131 , the second terminal plate 141 and the first insulating member 15 provided in some embodiments of the present application.

[0132] In the description of the embodiments of the present application, for the convenience of explanation, the direction of the arrow X represents the "wall thickness direction of the first shell wall 11" and the "height direction of the battery cell 10", the direction of the arrow Y represents the "length direction of the first shell wall 11", the "length direction of the battery cell 10", and the "first direction", and the direction of the arrow Z represents the "width direction of the first shell wall 11", the "thickness direction of the battery cell 10", and the "second direction".

[0133] The first aspect of the present application provides a battery cell 10, such as Figures 4 to 16 As shown, the battery cell 10 includes a shell 1 having a accommodating space 12, and the shell 1 includes a first shell wall 11; an electrode assembly 2, at least partially arranged in the accommodating space 12; a first electrode terminal 13, connected to the electrode assembly 2, and having a first terminal plate 131; a second electrode terminal 14, connected to the electrode assembly 2, and having a second terminal plate 141; a first insulating member 15, arranged on the first shell wall 11, wherein the first terminal plate 131 and the second terminal plate 141 are arranged on the side of the first shell wall 11 away from the accommodating space 12; along the wall thickness direction X of the first shell wall 11, a portion of the first insulating member 15 is arranged between the first terminal plate 131 and the first shell wall 11 and between the second terminal plate 141 and the first shell wall 11.

[0134] In some embodiments, as Figure 4As shown, the battery cell 10 includes an electrode assembly 2. The electrode assembly 2 includes a positive electrode sheet, a negative electrode sheet, and a separator. During the charge and discharge process of the battery cell 10, active ions (such as lithium ions) are embedded and released back and forth between the positive electrode and the negative electrode. The separator is arranged between the positive electrode sheet and the negative electrode sheet to prevent the positive and negative electrodes from short-circuiting while allowing active ions to pass through. Figure 4 In the embodiment shown, as the electrode assembly 2, two stacked winding bodies formed by stacking and winding the positive electrode sheet, the negative electrode sheet and the separator are shown. However, the electrode assembly 2 is not limited to Figure 4 The winding structure shown may also be, for example, a laminated structure or other structural forms.

[0135] The electrode assembly 2 is provided with tabs, which can lead the current out of the electrode assembly 2. The tabs include positive tabs and negative tabs. Figure 4 In the illustrated embodiment, the electrode assembly 2 includes a first electrode tab 21 and a second electrode tab 22. The first electrode tab 21 and the second electrode tab 22 are disposed on the same side of the electrode assembly 2 along the thickness direction X of the first housing wall 11 and are both disposed near one end of the electrode assembly 2 along the length of the first housing wall 11. Of course, the first electrode tab 21 and the second electrode tab 22 may also be disposed on opposite sides of the electrode assembly 2; the first electrode tab 21 and the second electrode tab 22 may also be disposed near both ends of the electrode assembly 2 along the length of the first housing wall 11.

[0136] In some embodiments, the battery cell 10 includes a shell 1. The shell 1 can be a steel shell, an aluminum shell, a plastic shell (such as polypropylene), a composite metal shell (such as a copper-aluminum composite shell) or an aluminum-plastic film. In some embodiments, the shell can be a sealed structure or a non-sealed structure. As an example, when the shell is a non-sealed structure, the shell plays a role in protecting the electrode assembly, and a sealing bag is further included between the shell and the electrode assembly, which is used to encapsulate the electrode assembly and the electrolyte. Specifically, the sealing bag can be a bag-shaped insulating member or an aluminum-plastic film. When the shell is a sealed structure, it is used to encapsulate components such as the electrode assembly and the electrolyte.

[0137] As an example, the battery cell 10 may be a cylindrical battery cell, a prismatic battery cell, a soft pack battery cell or a battery cell of other shapes, wherein the prismatic battery cell includes a square shell battery cell, a blade-shaped battery cell, a multi-prismatic battery, and the multi-prismatic battery is, for example, a hexagonal battery. Figures 4 to 16 In the illustrated embodiment, for ease of description, a square-shell battery cell is taken as an example.

[0138] In some embodiments, as Figure 4As shown, the housing 1 includes multiple housing walls, some of which enclose a space with an opening. The opening can be closed by another housing wall (e.g., first housing wall 11) to form a receiving space 12 for accommodating the electrode assembly 2 and electrolyte and other substances. The housing 1 can be provided with one or more openings. The housing wall (e.g., first housing wall 11) that closes the opening can also be configured as a top cover.

[0139] In some embodiments, as Figure 4 As shown, the housing 1 is provided with a first electrode terminal 13 and a second electrode terminal 14. The first electrode terminal 13 and the second electrode terminal 14 are both electrically connected to the tabs, either directly or indirectly via a transition component. For ease of description, in this embodiment of the present application, the housing wall where the first electrode terminal 13 and the second electrode terminal 14 are located is referred to as the first housing wall 11.

[0140] Optionally, the first electrode terminal 13 and the second electrode terminal 14 may have the same polarity or opposite polarity. Optionally, the two electrode terminals may be positive and the housing 1 may be negative; the two electrode terminals may be negative and the housing 1 may be positive; or one of the two electrode terminals may be negative and the other positive.

[0141] In some embodiments, the first electrode terminal 13 has a first terminal plate 131, and the second electrode terminal 14 has a second terminal plate 141. The first terminal plate 131 and the second terminal plate 141 are arranged on a side of the first housing wall 11 away from the accommodation space 12 (for example, Figure 4 The first electrode terminal 13 and the second electrode terminal 14 also have a partial structure located inside the housing 1 and electrically connected to the tabs. The electrode terminals are located on a terminal plate outside the housing 1 and are connected to a portion located inside the housing 1. They may be an integrally formed structure or may be connected by connecting columns, etc. This application does not make any specific restrictions on this.

[0142] Optionally, the first terminal plate 131 and the second terminal plate 141 may be in the shape of a cuboid, a triangular prism, an L-shaped (eg Figure 4 The shapes of the first terminal plate 131 and the second terminal plate 141 may be the same or different.

[0143] In some embodiments, as Figure 8 and Figure 16 As shown, a portion of the first insulating member 15 is arranged between the first terminal plate 131 and the first shell wall 11, for insulating the first terminal plate 131 and the first shell wall 11 from each other; a portion of the first insulating member 15 is arranged between the second terminal plate 141 and the first shell wall 11, for insulating the second terminal plate 141 and the first shell wall 11 from each other.

[0144] In some specific embodiments, the first electrode terminal 13 and the second electrode terminal 14 are made of conductive metal, such as copper or aluminum; and the insulating member is made of plastic, for example.

[0145] In some embodiments, at least a portion of the first terminal plate 131 and / or at least a portion of the second terminal plate 141 is disposed between another portion of the first insulating member 15 and the first housing wall 11. Figures 4 to 16 As shown, optionally, at least a portion of the first terminal plate 131 may be located on another portion of the first insulating member 15 (eg Figure 8 The first abutment wall 151 or Figure 9 The second abutment wall 154 shown in FIG. 1 is located between the first housing wall 11; at least a portion of the second terminal plate 141 may be located at another portion of the first insulating member 15 (eg Figure 8 The first abutment wall 151 or Figure 11 The second abutment wall 154 or Figure 12 The second abutment wall 154 shown in FIG. 1 is located between the first housing wall 11; at least a portion of the first terminal plate 131 may be located at another portion of the first insulating member 15 (eg Figure 8 The first abutment wall 151 or Figure 9 and the first housing wall 11, and at least a portion of the second terminal plate 141 is located between another portion of the first insulating member 15 (eg Figure 8 The first abutment wall 151 or Figure 9 Between the second abutment wall 154 shown and the first shell wall 11.

[0146] Due to the above arrangement, when one electrode terminal is subjected to an external force or torque, the first insulating member 15 can transfer the force acting on this electrode terminal to the other electrode terminal, and the two electrode terminals jointly resist the external force or torque, which can enhance the deformation resistance of the electrode terminal. Moreover, a portion of the first insulating member 15 is located between the first terminal plate 131 and the first shell wall 11 and between the second terminal plate 141 and the first shell wall 11, which can insulate the first terminal plate 131 and the second terminal plate 141 from the first shell wall 11, make the shell non-electrical and simplify the number of components.

[0147] In some embodiments, as Figure 8 、 Figure 11 、 Figure 12 and Figure 13As shown, the first insulating member 15 includes a connected insulating bottom wall 152 and a first abutting wall 151; the insulating bottom wall 152 is arranged between the first terminal plate 131 and the first shell wall 11 and between the second terminal plate 141 and the first shell wall 11; along the wall thickness direction X of the first shell wall 11, at least part of the first terminal plate 131 and / or at least part of the second terminal plate 141 is arranged between the first abutting wall 151 and the insulating bottom wall 152.

[0148] In some embodiments, the insulating bottom wall 152 is disposed between the first terminal plate 131 and the first housing wall 11 and between the second terminal plate 141 and the first housing wall 11 to insulate the first terminal plate 131 and the second terminal plate 141 from the first housing wall 11 .

[0149] In some embodiments, there may be one, two, three or four first abutting walls 151 . When there are multiple first abutting walls 151 , the shapes or sizes of the multiple first abutting walls 151 may be the same or different.

[0150] The first abutting wall 151 and the insulating bottom wall 152 can be an integral structure or a separate structure. When they are an integral structure, they can be integrally injection molded. When they are a separate structure, they can be indirectly connected.

[0151] like Figure 6 or Figure 10 As shown, at least a portion of the first terminal plate 131 may be located between the first abutting wall 151 and the insulating bottom wall 152. Alternatively, one end portion of the first terminal plate 131 along the first direction Y (eg Figure 6 or Figure 10 The left end or right end shown in the figure) is located between the first abutting wall 151 and the insulating bottom wall 152, or the two ends of the first terminal plate 131 along the first direction Y (for example Figure 6 or Figure 10 The left end and the right end shown in the figure are respectively located between different first abutting walls 151 and the insulating bottom wall 152. The overlapping portion of the first abutting wall 151 and the first terminal plate 131 along the wall thickness direction X can occupy all or part of the length of the first terminal plate 131 along the second direction Z. Of course, one end of the first terminal plate 131 along the second direction Z (for example Figure 6 or Figure 10 The upper end or lower end shown in the figure) is located between the other first abutting wall 151 and the insulating bottom wall 152, or the two ends of the first terminal plate 131 along the second direction Z (for example Figure 6 or Figure 10The upper end and lower end shown in the figure are respectively located between different first abutment walls 151 and insulating bottom walls 152, wherein the overlapping part of the first abutment wall 151 and the first terminal plate 131 along the wall thickness direction X can occupy all or part of the length of the first terminal plate 131 along the first direction Y.

[0152] Furthermore, the length of the overlapping portion of the first terminal plate 131 and the first abutting wall 151 along the wall thickness direction X in a direction perpendicular to the wall thickness direction X (eg, the first direction Y or the second direction Z) is greater than or equal to 0.3 mm.

[0153] like Figure 6 or Figure 10 As shown, at least a portion of the second terminal plate 141 may be located between the first abutting wall 151 and the insulating bottom wall 152. Alternatively, one end portion of the second terminal plate 141 along the first direction Y (eg Figure 6 The left end portion shown in the figure is located between the first abutting wall 151 and the insulating bottom wall 152, wherein the overlapping portion of the first abutting wall 151 and the second terminal plate 141 along the wall thickness direction X can occupy all or part of the length of the second terminal plate 141 along the second direction Z; of course, one end portion of the second terminal plate 141 along the second direction Z (for example Figure 6 The lower end portion shown in the figure is located between another first abutment wall 151 and the insulating bottom wall 152, wherein the overlapping portion of the first abutment wall 151 and the first terminal plate 131 along the wall thickness direction X can occupy all or part of the length of the first terminal plate 131 along the first direction Y.

[0154] Furthermore, the length of the overlapping portion of the second terminal plate 141 and the first abutting wall 151 along the wall thickness direction X in a direction perpendicular to the wall thickness direction X (eg, the first direction Y or the second direction Z) is greater than or equal to 0.3 mm.

[0155] In a specific embodiment, Figure 8 As shown, at least a portion of the first terminal plate 131 may be located between the first abutting wall 151 and the insulating bottom wall 152, and at least a portion of the second terminal plate 141 may be located between the first abutting wall 151 and the insulating bottom wall 152. Along the first direction Y, the end portion of the first terminal plate 131 close to the second terminal plate 141 (e.g. Figure 8 the right end shown in FIG) and the end of the second terminal plate 141 close to the first terminal plate 131 (eg Figure 8 The left end as shown in FIG. 1 is located between the same first abutting wall 151 and the insulating bottom wall 152 .

[0156] It should be noted that the end refers to the portion of the terminal board close to the edge. Of course, the portion from the middle of the terminal board to the edge can also be called the end. Figure 6 For example, a portion of the first terminal plate 131 / the second terminal plate 141 closer to one edge along the second direction Z to the other edge can also be referred to as an end portion. Of course, a portion of the first terminal plate 131 / the second terminal plate 141 closer to one edge along the first direction Y to the other edge can also be referred to as an end portion. This will not be repeated in the following embodiments.

[0157] Optionally, along the wall thickness direction X, the surface of the first abutting wall 151 facing away from the accommodating space 12 (eg Figure 8 The upper surface shown in FIG. 1 may extend beyond the surface of the first terminal plate 131 and / or the second terminal plate 141 facing away from the accommodation space 12 (eg, Figure 8 Along the wall thickness direction X, the first abutting wall 151 away from the surface of the accommodating space 12 side (eg Figure 8 The upper surface shown in FIG. 1 may be the same as the surface of the first terminal plate 131 and / or the second terminal plate 141 facing away from the receiving space 12 (eg Figure 8 Along the wall thickness direction X, the first abutting wall 151 faces away from the surface of the accommodating space 12 (eg Figure 8 The upper surface shown in FIG. 1 is larger than the surface of the first terminal plate 131 and / or the second terminal plate 141 facing away from the accommodation space 12 (eg Figure 8 The upper surface shown) is closer to the accommodation space.

[0158] Due to the above arrangement, when one electrode terminal is pulled or squeezed in the wall thickness direction, the first insulating member 15 can transfer the force acting on this electrode terminal to the other electrode terminal. By jointly resisting the external force, the deformation resistance of the electrode terminal can be enhanced.

[0159] In some embodiments, as Figure 14 and Figure 16 As shown, the first insulating member 15 is fixed to the first terminal plate 131 and the second terminal plate 141 , and the first abutting wall 151 abuts against at least a portion of the first terminal plate 131 and / or at least a portion of the second terminal plate 141 .

[0160] The fixing method can be one-piece injection molding, bonding, fastening the two together through connecting columns, etc.

[0161] In some embodiments, the first abutting wall 151 abuts against at least a portion of the first terminal plate 131 and / or at least a portion of the second terminal plate 141. The abutment herein includes a situation where the first electrode terminal 13 and / or the second electrode terminal 14 abuts against the first abutting wall 151 due to bending deformation, and also includes a situation where the first electrode terminal 13 and / or the second electrode terminal 14 abut against the first abutting wall 151 due to a pre-tightening force in the initial assembly state.

[0162] Since the first abutting wall 151 abuts against at least part of the first terminal plate 131 and / or at least part of the second terminal plate 141, when one electrode terminal is pulled or squeezed, the first insulating member 15 can better transfer the force acting on this electrode terminal to the other electrode terminal, and can further enhance the deformation resistance of the electrode terminal.

[0163] In some embodiments, as Figure 4 As shown, the electrode assembly 2 includes a first electrode piece and a second electrode piece with opposite polarities, the first electrode terminal 13 is electrically connected to the first electrode piece, and the second electrode terminal 14 is electrically connected to the second electrode piece.

[0164] The first electrode and the second electrode are led out through the tabs and are directly or indirectly connected to the electrode terminals. Figure 4 As shown, the tabs include a first tab 21 and a second tab 22 .

[0165] In some embodiments, the first insulating member 15 is partially disposed between the first electrode terminal 13 and the first housing wall 11. Alternatively, the first electrode terminal 13 and the second electrode terminal 14 are connected to the positive and negative tabs, respectively, with opposite polarities, and the first insulating member 15 is partially disposed between the first electrode terminal 13 and the second electrode terminal 14.

[0166] Optionally, the first electrode terminal 13 and the second electrode terminal 14 are connected to the same electrode tab of the positive electrode tab and the negative electrode tab and have the same polarity, and no insulating member may be provided between the first electrode terminal 13 and the second electrode terminal 14 .

[0167] Therefore, when the first electrode terminal 13 and the second electrode terminal 14 have opposite polarities, the two electrode terminals can be well insulated from each other and from the housing, and the deformation resistance and strength of the electrode terminals can be improved.

[0168] In some embodiments, as Figure 8 As shown, along the wall thickness direction X of the first shell wall 11, the projections of the first abutting wall 151, the first terminal plate 131, and the insulating bottom wall 152 in the same projection plane partially overlap, and the projections of the first abutting wall 151, the second terminal plate 141, and the insulating bottom wall 152 in the same projection plane partially overlap.

[0169] In some embodiments, along the wall thickness direction X of the first shell wall 11, the first abutting wall 151, the first terminal plate 131, and the insulating bottom wall 152 have overlapping portions; along the wall thickness direction X of the first shell wall 11, the first abutting wall 151, the second terminal plate 141, and the insulating bottom wall 152 have overlapping portions.

[0170] In some specific embodiments, Figure 8As shown, along the first direction Y, the end of the first terminal plate 131 close to the second terminal plate 141 (for example Figure 8 the right end shown in FIG) and the end of the second terminal plate 141 close to the first terminal plate 131 (eg Figure 8 The left end portion shown in FIG. 1 is located between the same first abutting wall 151 and the insulating bottom wall 152 .

[0171] Therefore, both the first terminal plate and the second terminal plate can suppress deformation in the wall thickness direction through the first abutment wall. Therefore, when the first electrode terminal 13 is subjected to a pulling force in the wall thickness direction X, the force exerted on the first electrode terminal 13 can be better transferred to the second electrode terminal 14, and when the second electrode terminal 14 is subjected to a pulling force in the wall thickness direction X, the force exerted on the second electrode terminal 14 can be better transferred to the first electrode terminal 13, further enhancing the deformation resistance of the electrode terminals.

[0172] In some embodiments, as Figure 8 or Figure 12 As shown, the first abutting wall 151 is connected to the insulating bottom wall 152 through the first connecting wall 153, and the first connecting wall 153 extends along the wall thickness direction X; along the direction perpendicular to the wall thickness direction X, the first connecting wall 153 is located between the first terminal plate 131 and the second terminal plate 141.

[0173] In some embodiments, the first connecting wall 153 connects the first abutting wall 151 and the insulating bottom wall 152 . The first connecting wall 153 , the first abutting wall 151 , and the insulating bottom wall 152 may be integrally injection molded.

[0174] The first connecting wall 153 is located between the first terminal plate 131 and the second terminal plate 141 in a direction perpendicular to the wall thickness direction X. Optionally, the first connecting wall 153 may be provided in a portion between the first terminal plate 131 and the second terminal plate 141, and further optionally, the first connecting wall 153 may be provided in the entire area between the first terminal plate 131 and the second terminal plate 141.

[0175] The first connecting wall 153 is positioned between the first terminal plate 131 and the second terminal plate 141 to increase the creepage distance between the first electrode terminal 13 and the second electrode terminal 14, thereby improving insulation reliability. Furthermore, the blocking effect of the first connecting wall strengthens the first and second electrode terminals 13 and 14 in a direction perpendicular to the thickness direction X of the first housing wall 11, reducing the probability of displacement or deformation of the first and second electrode terminals 13 and 14 due to external forces.

[0176] In some embodiments, as Figure 7 and Figure 9As shown, the first insulating member 15 also includes at least one second abutting wall 154 connected to the insulating bottom wall 152, and along the wall thickness direction X of the first shell wall 11, the projections of the second abutting wall 154, the first terminal plate 131, and the insulating bottom wall 152 in the same projection plane partially overlap, and / or, along the wall thickness direction X of the first shell wall 11, the projections of the second abutting wall 154, the second terminal plate 141, and the insulating bottom wall 152 in the same projection plane partially overlap.

[0177] In some embodiments, along the wall thickness direction X of the first shell wall 11, the second abutting wall 154, the first terminal plate 131, and the insulating bottom wall 152 have overlapping portions, and / or, along the wall thickness direction X of the first shell wall 11, the second abutting wall 154, the second terminal plate 141, and the insulating bottom wall 152 have overlapping portions.

[0178] In some embodiments, the number of the second abutting wall 154 may be one, two, three, or four. When there are multiple second abutting walls 154 , the shapes or sizes of the multiple second abutting walls 154 may be the same or different.

[0179] The second abutting wall 154 and the insulating bottom wall 152 can be an integral structure or a separate structure. When the integral structure is used, they can be integrally injection molded. When the separate structure is used, they can be indirectly connected.

[0180] In some embodiments, as Figure 6 and Figure 9 As shown, at least a portion of the first terminal plate 131 can be located between the second abutting wall 154 and the insulating bottom wall 152. Optionally, along the wall thickness direction X of the first shell wall 11, the second abutting wall 154 and one end of the first terminal plate 131 along the second direction Z (for example, Figure 6 The upper end or lower end shown in the figure) and the projection portion of the insulating bottom wall 152 in the same projection plane overlap, wherein the overlapping portion of the second abutting wall 154 and the first terminal plate 131 along the wall thickness direction X can occupy all or part of the length of the first terminal plate 131 along the first direction Y; of course, the second abutting wall 154 and one end of the first terminal plate 131 along the first direction Y (for example Figure 6 The left end or right end shown in the figure) and the projection portion of the insulating bottom wall 152 in the same projection plane overlap, wherein the overlapping portion of the second abutment wall 154 and the first terminal plate 131 along the wall thickness direction X can occupy all or part of the length of the first terminal plate 131 along the second direction Z.

[0181] Furthermore, the length of the overlapping portion of the first terminal plate 131 and the second abutting wall 154 along the wall thickness direction X in a direction perpendicular to the wall thickness direction X (eg, the first direction Y or the second direction Z) is greater than or equal to 0.3 mm.

[0182] In some embodiments, as Figure 6 and Figure 9 As shown, at least a portion of the second terminal plate 141 can be located between the second abutting wall 154 and the insulating bottom wall 152. Optionally, along the wall thickness direction X of the first shell wall 11, the second abutting wall 154 and one end of the second terminal plate 141 along the first direction Y (for example, Figure 6 The left end or right end shown in the figure) and the projection portion of the insulating bottom wall 152 in the same projection plane overlap, wherein the overlapping portion of the second abutting wall 154 and the second terminal plate 141 along the wall thickness direction X can occupy all or part of the length of the second terminal plate 141 along the second direction Z; of course, the second abutting wall 154 and one end of the second terminal plate 141 along the second direction Z (for example Figure 6 The upper end and lower end shown in the figure) and the projection portion of the insulating bottom wall 152 within the same projection plane overlap, wherein the overlapping portion of the second abutment wall 154 and the second terminal plate 141 along the wall thickness direction X can occupy all or part of the length of the second terminal plate 141 along the first direction Y.

[0183] Furthermore, the length of the overlapping portion of the second terminal plate 141 and the second abutting wall 154 along the wall thickness direction X in the direction perpendicular to the wall thickness direction X (the first direction Y or the second direction Z) is greater than or equal to 0.3 mm.

[0184] Optional, such as Figure 9 As shown, along the wall thickness direction X, the surface of the second abutting wall 154 facing away from the accommodating space 12 (eg Figure 8 The upper surface shown in FIG. 1 may extend beyond the surface of the first terminal plate 131 and / or the second terminal plate 141 facing away from the accommodation space 12 (eg, Figure 8 along the wall thickness direction X, the second abutment wall 154 away from the surface of the accommodating space 12 side (eg Figure 8 The upper surface shown in FIG. 1 may be the same as the surface of the first terminal plate 131 and / or the second terminal plate 141 facing away from the receiving space 12 (eg Figure 8 Along the wall thickness direction X, the second abutment wall 154 away from the surface of the accommodating space 12 side (eg Figure 8 The upper surface shown in FIG. 1 is larger than the surface of the first terminal plate 131 and / or the second terminal plate 141 facing away from the accommodation space 12 (eg Figure 8 The upper surface shown) is closer to the accommodation space.

[0185] Due to the above arrangement, not only can external force be transmitted through the first insulating member 15, thereby the two electrode terminals jointly resist the external force, but the added second abutment wall 154 can further enhance the limiting force on the electrode terminal in the wall thickness direction, thereby further enhancing the electrode terminal's ability to resist deformation.

[0186] In some embodiments, as Figure 9 、 Figure 11 、 Figure 12 and Figure 13 As shown, the first insulating member 15 also includes a second abutting wall 154 connected to the insulating bottom wall 152. Along the wall thickness direction X of the first shell wall 11, the projections of the first abutting wall 151, the first terminal plate 131, and the insulating bottom wall 152 in the same projection plane overlap, and the projections of the second abutting wall 154, the second terminal plate 141, and the insulating bottom wall 152 in the same projection plane overlap.

[0187] In some embodiments, as Figure 6 and Figure 9 As shown, at least a portion of the first terminal plate 131 can be located between the first abutting wall 151 and the insulating bottom wall 152. Optionally, along the wall thickness direction X of the first shell wall 11, the first abutting wall 151 and the upper end of the first terminal plate 131 along the first direction Y (for example, Figure 6 The left end or right end shown in the figure) and the projection of the insulating bottom wall 152 in the same projection plane overlap. Of course, the first abutting wall 151 and one end of the first terminal plate 131 along the second direction Z (for example Figure 6 The upper end or lower end shown in the figure) and the projection portion of the insulating bottom wall 152 in the same projection plane overlap.

[0188] In some embodiments, as Figure 6 and Figure 9 As shown, at least a portion of the second terminal plate 141 can be located between the second abutting wall 154 and the insulating bottom wall 152. Optionally, along the wall thickness direction X of the first shell wall 11, the second abutting wall 154 and the upper end of the second terminal plate 141 along the first direction Y (for example, Figure 6 The left end or right end shown in the figure) and the projection of the insulating bottom wall 152 in the same projection plane overlap. Of course, the second abutting wall 154 and one end of the second terminal plate 141 along the second direction Z (for example Figure 6 The upper end or lower end shown in the figure) and the projection portion of the insulating bottom wall 152 in the same projection plane overlap.

[0189] Due to the above arrangement, not only can external force be transmitted through the first insulating member 15, thereby the two electrode terminals jointly resist the external force, but also the first abutment wall 151 and the second abutment wall 154 can respectively limit the deformation of the electrode terminal in the wall thickness direction, thereby further enhancing the deformation resistance of the electrode terminal.

[0190] In some embodiments, as Figure 8 and Figure 9 As shown, the first abutting wall 151 is connected to the insulating bottom wall 152 through the first connecting wall 153, and the second abutting wall 154 is connected to the insulating bottom wall 152 through the second connecting wall 155; the first connecting wall 153 and the second connecting wall 155 extend along the wall thickness direction X respectively; along the direction perpendicular to the wall thickness direction X, the first connecting wall 153 and the second connecting wall 155 are both located between the first terminal plate 131 and the second terminal plate 141.

[0191] In some embodiments, the second connecting wall 155 connects the second abutting wall 154 and the insulating bottom wall 152 . The second connecting wall 155 , the second abutting wall 154 , and the insulating bottom wall 152 may be integrally injection molded.

[0192] In some embodiments, the first connecting wall 153 is located between the first terminal plate 131 and the second terminal plate 141 along a direction perpendicular to the wall thickness direction X. Optionally, the first connecting wall 153 may be provided in a portion between the first terminal plate 131 and the second terminal plate 141, and further optionally, the first connecting wall 153 may be provided in the entire area between the first terminal plate 131 and the second terminal plate 141.

[0193] In some embodiments, the second connecting wall 155 is located between the first terminal plate 131 and the second terminal plate 141 along a direction perpendicular to the wall thickness direction X. Optionally, the second connecting wall 155 may be provided in a portion between the first terminal plate 131 and the second terminal plate 141, and further optionally, the second connecting wall 155 may be provided in the entire area between the first terminal plate 131 and the second terminal plate 141.

[0194] In a specific embodiment, Figure 11Taking the shown orientation as an example, along the second direction Z, there are a first connecting wall 153 and a second connecting wall 155 arranged along the second direction Z between the first electrode terminal 13 and the second electrode terminal 14, the first abutting wall 151 and the first connecting wall 153 are connected, and the first abutting wall 151 extends along the second direction Z and close to the direction of the first terminal plate 131, so that the first abutting wall 151, the first terminal plate 131 and the insulating bottom wall 152 have overlapping parts along the wall thickness direction X; the second abutting wall 154 and the second connecting wall 155 are connected, and the second abutting wall 154 extends along the second direction Z and close to the direction of the second terminal plate 141, so that the second abutting wall 154, the first terminal plate 131 and the insulating bottom wall 152 have overlapping parts along the wall thickness direction X.

[0195] The first connecting wall 153 and the second connecting wall 155 are both located between the first terminal plate 131 and the second terminal plate 141, thereby increasing the creepage distance between the first electrode terminal 13 and the second electrode terminal 14 and improving insulation reliability. Furthermore, the blocking effect of the two connecting walls on the two electrode terminals can enhance the strength of the first electrode terminal 13 and the second electrode terminal 14 in a direction perpendicular to the wall thickness direction X of the first housing wall 11, thereby reducing the probability of displacement or deformation of the first electrode terminal 13 and the second electrode terminal 14 due to external forces.

[0196] In some embodiments, the first abutment wall 151 is connected to the insulating bottom wall 152 through the first connecting wall 153, and the second abutment wall 154 is connected to the insulating bottom wall 152 through the second connecting wall 155; the first connecting wall 153 and the second connecting wall 155 extend along the wall thickness direction X respectively; along the direction perpendicular to the wall thickness direction X, at least one of the first terminal plate 131 and the second terminal plate 141 is located between the first connecting wall 153 and the second connecting wall 155.

[0197] In some specific embodiments, such as Figure 13 As shown, along the direction perpendicular to the wall thickness direction X, the first terminal plate 131 can be located between the first connecting wall 153 and the second connecting wall 155. Figure 12 As shown, along the direction perpendicular to the wall thickness direction X, the second terminal plate 141 can also be located between the first connecting wall 153 and the second connecting wall 155. Figure 11 As shown, along the direction perpendicular to the wall thickness direction X, the first electrode terminal 13 and the second terminal plate 141 may also be located between the first connecting wall 153 and the second connecting wall 155 .

[0198] This can improve the degree of freedom in the installation positions of the connecting wall and the abutting wall.

[0199] In some embodiments, as Figure 14As shown, the first electrode terminal 13 also includes a first terminal disc 132, at least a portion of the first terminal disc 132 is arranged on the side of the first shell wall 11 facing the accommodating space 12, and the second electrode terminal 14 also includes a second terminal disc 142, at least a portion of the second terminal disc 142 is arranged on the side of the first shell wall 11 facing the accommodating space 12, and along the wall thickness direction X of the first shell wall 11, a second insulating member is further provided between the first terminal disc 132 and the first shell wall 11 and between the second terminal disc 142 and the first shell wall 11.

[0200] In some embodiments, as Figure 14 As shown, the first electrode terminal 13 includes a first terminal plate 131 and a first terminal disc 132 electrically connected to each other, wherein the first terminal plate 131 is located on the side of the first shell wall 11 away from the accommodating space 12, and the first terminal disc 132 is located on the side of the first shell wall 11 facing the accommodating space 12, and the second electrode terminal 14 includes a second terminal plate 141 and a second terminal disc 142 electrically connected to each other, wherein the second terminal plate 141 is located on the side of the first shell wall 11 away from the accommodating space 12, and the second terminal disc 142 is located on the side of the first shell wall 11 facing the accommodating space 12, and along the wall thickness direction X of the first shell wall 11, a second insulating member is further provided between the first terminal disc 132 and the first shell wall 11 and between the second terminal disc 142 and the first shell wall 11, for insulating the first terminal disc 132 and the second terminal disc 142 from the first shell wall 11.

[0201] The first and second terminal plates 131, 141 are located outside the battery cell 10's housing 1 and are used to connect to the busbar 3 and other components. The first and second terminal plates 132, 142 are located inside the battery cell 10's housing 1 and are used to electrically connect to the tabs. The terminal plates and trays can be made of metal, such as copper or aluminum.

[0202] Optionally, the first terminal plate 131, the second terminal plate 141, the first terminal plate 132, and the second terminal plate 142 are each configured to be substantially flat. The shape of the flat plate can be designed according to the situation, for example, it can be rectangular, circular, Figure 16 L-shaped as shown, etc.

[0203] Optionally, the first terminal plate 131 , the second terminal plate 141 , the first terminal disc 132 , and the second terminal disc 142 may be fixed to the first housing wall 11 by connecting columns or the like.

[0204] Because the electrode terminals include terminal plates located outside the outer casing 1 of the battery cell 10 and terminal discs located within the outer casing 1, the electrode terminals can be easily connected to the tabs of the electrode assembly 2 via the terminal discs. Furthermore, the terminal plates can be designed larger to improve heat dissipation, support for the first housing wall 11, and connection strength to the busbar 3. This allows for greater freedom in the design of the shapes of the terminal plates and terminal discs. Furthermore, the terminal plates and terminal discs, respectively, clamp the first housing wall 11 from both the inside and outside of the outer casing 1, thereby increasing the bending strength of the first housing wall 11.

[0205] In some embodiments, as Figure 8 As shown, the first terminal plate 131 is provided with a first recessed portion 171, the second terminal plate 141 is provided with a second recessed portion 172, the first abutting wall 151 at least partially overlaps with the first recessed portion 171 and the second recessed portion 172 along the wall thickness direction X of the first shell wall 11, and at least part of the first abutting wall 151 cooperates with the first recessed portion 171 and the second recessed portion 172.

[0206] The first recess 171 is a recess formed relative to the surface of the first terminal plate 131 and capable of accommodating at least a portion of the first abutting wall 151. The recess may be formed by a groove or a step. In the case where the recess is formed by a step, it may include a single step, or two or more steps.

[0207] The second recess 172 is a recess formed relative to the surface of the second terminal plate 141 and capable of accommodating at least a portion of the first abutting wall 151. The recess can be formed by a groove or a step. In the case where the recess is formed by a step, it can include a single step, or two or more steps.

[0208] In a specific embodiment, Figure 8 As shown, along the wall thickness direction X, a portion of the first abutting wall 151 overlaps with the first recessed portion 171 , and another portion of the first abutting wall 151 overlaps with the second recessed portion 172 .

[0209] Therefore, by cooperating with the first abutting wall 151 and the first recessed portion 171 and the second recessed portion 172, it is convenient to realize the transmission of force along the wall thickness direction X and the force perpendicular to the wall thickness direction between the first electrode terminal 13 and the second electrode terminal 14, which is beneficial to improving the strength of the first electrode terminal 13 and / or the second electrode terminal 14; by cooperating with the first abutting wall 151 and the first recessed portion 171 and the second recessed portion 172 to reduce the space occupied by the first abutting wall 151, the space utilization is improved, and the rapid alignment between the two electrode terminals and the first insulating member is facilitated.

[0210] In some embodiments, as Figure 8 and Figure 9 As shown, the first terminal plate 131 is provided with a first recessed portion 171, the second terminal plate 141 is provided with a second recessed portion 172, the first abutting wall 151 at least partially overlaps with the first recessed portion 171 and the second recessed portion 172 along the wall thickness direction X of the first shell wall 11, and at least part of the first abutting wall 151 cooperates with the first recessed portion 171 and the second recessed portion 172; the first terminal plate 131 or the second terminal plate 141 is also provided with a third recessed portion 173, the second abutting wall 154 at least partially overlaps with the third recessed portion 173 along the wall thickness direction X of the first shell wall 11, and at least part of the second abutting wall 154 cooperates with the third recessed portion 173.

[0211] like Figure 9 As shown, the third recessed portion 173 is a recess formed relative to the surface of the first terminal plate 131 or the second terminal plate 141 and capable of accommodating at least a portion of the second abutting wall 154. The recess may be formed by a groove or by a step. In the case where the recess is formed by a step, it may include a single step, or may include two or more steps.

[0212] In a specific embodiment, Figures 6 to 9 As shown, along the wall thickness direction X, part of the first abutting wall 151 has an overlapping part with the first recessed portion 171, another part of the first abutting wall 151 also has an overlapping part with the second recessed portion 172, and the second abutting wall 154 has an overlapping part with the third recessed portion 173, wherein the third recessed portion 173 is provided on the first terminal plate 131. Of course, the third recessed portion 173 can also be provided on the second terminal plate 141. Furthermore, the third recessed portion 173 is provided on both the first terminal plate 131 and the second terminal plate 141.

[0213] Therefore, by cooperating the first abutting wall 151 with the first recessed portion 171 and the second recessed portion 172, and by cooperating the second abutting wall 154 with the third recessed portion 173, the force along the wall thickness direction X and the force perpendicular to the wall thickness direction between the first electrode terminal 13 and the second electrode terminal 14 are better transmitted, which is beneficial to improving the strength of the first electrode terminal 13 and / or the second electrode terminal 14; by cooperating the first abutting wall 151 with the first recessed portion 171 and the second recessed portion 172, and by cooperating the second abutting wall 154 with the third recessed portion 173 to reduce the space occupied by the first abutting wall 151 and the second abutting wall 154, the space utilization is improved, and the rapid alignment between the two electrode terminals and the first insulating member is facilitated.

[0214] In some embodiments, the first terminal plate 131 is provided with a first recessed portion 171, the second terminal plate 141 is provided with a second recessed portion 172, the first abutting wall 151 and the first recessed portion 171 at least partially overlap along the wall thickness direction X of the first shell wall 11, the second abutting wall 154 and the second recessed portion 172 at least partially overlap along the wall thickness direction X of the first shell wall 11, at least a portion of the first abutting wall 151 cooperates with the first recessed portion 171, and at least a portion of the second abutting wall 154 cooperates with the second recessed portion 172.

[0215] In some specific embodiments, such as Figures 11 to 13 As shown, along the wall thickness direction X, a portion of the first abutting wall 151 and the first recessed portion 171 have an overlapping portion, and a portion of the second abutting wall 154 and the second recessed portion 172 have an overlapping portion.

[0216] Therefore, by cooperating the first abutting wall 151 and the first recessed portion 171, the second abutting wall 154 and the second recessed portion 172, it is convenient to realize the transmission of force along the wall thickness direction X and the force perpendicular to the wall thickness direction between the first electrode terminal 13 and the second electrode terminal 14, which is beneficial to improving the strength of the first electrode terminal 13 and / or the second electrode terminal 14; by cooperating the first abutting wall 151 and the first recessed portion 171, the second abutting wall 154 and the second recessed portion 172 to reduce the space occupied by the first abutting wall 151 and the second abutting wall 154, the space utilization is improved, and the rapid alignment between the two electrode terminals and the first insulating member is facilitated.

[0217] In some embodiments, the first recessed portion 171 includes a first step portion 1711 and a second step portion 1712, the second recessed portion 172 includes a third step portion 1721 and a fourth step portion 1722, the second step portion 1712 is arranged on the side of the first step portion 1711 away from the second recessed portion 172, and the fourth step portion 1722 is arranged on the side of the third step portion 1721 away from the first recessed portion 171; the first abutment wall 151 is at least partially accommodated in the step space formed by the first step portion 1711 and the third step portion 1721.

[0218] The first step portion 1711 is formed by a portion of the first terminal plate 131 that is lowered toward the side away from the first housing wall 11 along the wall thickness direction X of the first housing wall 11. Figure 8 The first terminal plate 131 is located in the dotted box O2; the first terminal plate 131 is further formed with a second step portion 1712 at a position farther away from the second recessed portion 172 than the first step portion 1711, as shown Figure 8 In the portion of the first terminal plate 131 located in the dotted frame O1 , a portion of the first abutting wall 151 is accommodated in the first step portion 1711 .

[0219] The third step portion 1721 is formed by a portion of the second terminal plate 141 that is lowered toward the side away from the first housing wall 11 along the wall thickness direction X of the first housing wall 11. Figure 8 The portion of the second terminal plate 141 in the dotted box O3; a fourth step portion 1722 is further formed on the second terminal plate 141 at a position farther away from the first recessed portion 171 than the third step portion 1721, as shown Figure 8 The portion of the second terminal plate 141 located in the dotted frame O4, and another portion of the first abutting wall 151 are accommodated in the fourth step portion 1722.

[0220] Therefore, by cooperating with the first abutting wall 151 and the first step portion 1711 and the second step portion 1712, the force transmission along the wall thickness direction X between the first electrode terminal 13 and the second electrode terminal 14 is better realized, thereby improving the strength of the first electrode terminal 13 and the second electrode terminal 14; by cooperating with the first abutting wall 151 and the first step portion 1711 and the second step portion 1712, the space occupied by the first abutting wall 151 is reduced, thereby improving the space utilization.

[0221] In some embodiments, along the wall thickness direction X of the first housing wall 11 , the surface of the first abutting wall 151 on the side facing away from the first housing wall 11 (eg Figure 8 The upper surface shown in FIG. 1 does not exceed the surface of the first terminal plate 131 on the side facing away from the housing wall (eg Figure 8 and / or, along the wall thickness direction X of the first housing wall 11, the surface of the first abutting wall 151 away from the first housing wall 11 on one side (eg Figure 8 The upper surface shown in FIG. 1 does not exceed the surface of the second terminal plate 141 on the side facing away from the first housing wall 11 (eg Figure 8 upper surface shown).

[0222] As a result, the space occupied by the first abutting wall 151 can be reduced, space utilization can be improved, and the influence of the first abutting wall 151 on the connection between the electrode terminal and the busbar 3 can be reduced.

[0223] In some embodiments, along the wall thickness direction X of the first housing wall 11 , the surface of the second abutting wall 154 on the side facing away from the first housing wall 11 (eg Figure 9 、 Figure 11 Figure 12 or Figure 13 The upper surface shown in FIG. 1 does not exceed the surface of the first terminal plate 131 on the side facing away from the housing wall (eg Figure 9 、 Figure 11 Figure 12 or Figure 13and / or, along the wall thickness direction X of the first housing wall 11, the surface of the second abutting wall 154 away from the first housing wall 11 (eg Figure 9 、 Figure 11 Figure 12 or Figure 13 The upper surface shown in FIG. 1 does not exceed the surface of the second terminal plate 141 on the side facing away from the first housing wall 11 (eg Figure 9 、 Figure 11 Figure 12 or Figure 13 upper surface shown).

[0224] As a result, the space occupied by the second abutting wall 154 can be reduced, thereby improving space utilization, and the influence of the second abutting wall 154 on the connection between the electrode terminal and the busbar 3 can be reduced.

[0225] In some embodiments, along the wall thickness direction X of the first housing wall 11 , the surface of the first abutting wall 151 on the side facing away from the first housing wall 11 (eg Figure 8 The upper surface shown in FIG. 1 does not exceed the surface of the first terminal plate 131 on the side facing away from the housing wall (eg Figure 8 and / or, along the wall thickness direction X of the first housing wall 11, the surface of the first abutting wall 151 away from the first housing wall 11 on one side (eg Figure 8 The upper surface shown in FIG. 1 does not exceed the surface of the second terminal plate 141 on the side facing away from the first housing wall 11 (eg Figure 8 upper surface shown).

[0226] The surface of the first abutting wall 151 on the side facing away from the first housing wall 11 (eg Figure 8 The upper surface shown in FIG. 1 ) and the surface of the second abutment wall 154 on the side facing away from the first housing wall 11 (eg Figure 9 、 Figure 11 Figure 12 or Figure 13 The upper surface shown in FIG. 1 does not exceed the surface of the first terminal plate 131 on the side facing away from the first housing wall 11 (eg Figure 8 、 Figure 9 、 Figure 11 Figure 12 or Figure 13 and the surface of the first abutting wall 151 facing away from the first housing wall 11 (e.g. Figure 8 The upper surface shown in FIG. 1 ) and the surface of the second abutment wall 154 on the side facing away from the first housing wall 11 (eg Figure 9 、 Figure 11 Figure 12 or Figure 13 The upper surface shown in FIG. 1 does not exceed the surface of the second terminal plate 141 on the side facing away from the first housing wall 11 (eg Figure 8、 Figure 9 、 Figure 11 Figure 12 or Figure 13 upper surface shown).

[0227] Thus, the space occupied by the first abutting wall 151 and the second abutting wall 154 can be reduced, thereby improving space utilization, and the influence of the first abutting wall 151 and the second abutting wall 154 on the connection between the electrode terminal and the busbar 3 can be reduced.

[0228] In some embodiments, as Figure 16 As shown, the first insulating member 15 is an integrally formed component. Specifically, the first abutting wall 151, the first connecting wall 153, the insulating bottom wall 152, the second abutting wall 154, and the second connecting wall 155 are integrally formed. Furthermore, the first abutting wall 151, the first connecting wall 153, the insulating bottom wall 152, the second abutting wall 154, the second connecting wall 155, the first terminal plate 131, and the second terminal plate 141 are integrally formed. Common molding methods, such as mold molding, can be employed.

[0229] It is beneficial to reduce the number of parts, improve assembly efficiency and reduce production costs.

[0230] In some embodiments, the first insulating member 15 , the first terminal plate 131 , and the second terminal plate 141 are integrally formed by injection molding.

[0231] It is beneficial to reduce the number of parts, improve assembly efficiency and reduce production costs.

[0232] In some embodiments, along the wall thickness direction X of the first housing wall 11, the thickness W1 of the first abutting wall 151 is not less than 0.4 mm. The thickness W1 refers to the surface of the first abutting wall 151 that is perpendicular to the wall thickness direction X and closest to the accommodating space (e.g. Figure 8 The lower surface shown in FIG. 1 ) and the surface of the first abutting wall 151 perpendicular to the wall thickness direction X and facing away from the accommodating space (eg Figure 8 The distance along the wall thickness direction) is the upper surface shown.

[0233] Optional, such as Figure 8 As shown, along the wall thickness direction X of the first shell wall 11, the thickness W1 of the first abutting wall 151 can be 0.4mm, 0.41mm, 0.43mm, 0.48mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm, 2.0mm, or other values ​​within the above range, while taking into account the strength of the first terminal plate 131 along the wall thickness direction X of the first shell wall 11.

[0234] This can improve the strength of the first abutting wall 151 and prevent cracks from forming on the first abutting wall 151 when the electrode terminals are subjected to excessive force, thereby better transmitting the force acting on one electrode terminal to the other electrode terminal.

[0235] In some embodiments, as Figure 9 As shown, along the wall thickness direction X of the first shell wall 11, the thickness W2 of the second abutting wall 154 is not less than 0.4 mm. The thickness W2 refers to the surface of the second abutting wall 154 that is perpendicular to the wall thickness direction X and closest to the accommodating space (e.g. Figure 9 The lower surface shown in FIG. 1 ) and the surface of the second abutting wall 154 perpendicular to the wall thickness direction X and facing away from the accommodating space (eg Figure 8 The distance along the wall thickness direction) is the upper surface shown.

[0236] Optionally, along the wall thickness direction X of the first shell wall 11, the thickness W2 of the second abutment wall 154 can be 0.4mm, 0.41mm, 0.43mm, 0.48mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm, 2.0mm, or other values ​​within the above range, while taking into account the strength of the second terminal plate 141 along the wall thickness direction X of the first shell wall 11.

[0237] This can improve the strength of the second abutting wall 154 and prevent cracks from forming on the second abutting wall 154 when the electrode terminals are subjected to excessive force, thereby better transmitting the force acting on one electrode terminal to the other electrode terminal.

[0238] In some embodiments, as Figure 6 As shown, the first terminal plate 131 includes a first main body portion 41 and a first extension portion 51 connected to each other, and the second terminal plate 141 includes a second main body portion 42 and a second extension portion 52 connected to each other, along the first direction Y, at least a portion of the first extension portion 51 and at least a portion of the second extension portion 52 are located between the first main body portion 41 and the second main body portion 42, and the first extension portion 51 and the second extension portion 52 are arranged along the second direction Z, wherein the first direction Y and the second direction Z are perpendicular to each other and are both perpendicular to the wall thickness direction X of the first shell wall 11.

[0239] The first terminal plate 131 includes a first main body portion 41. Figure 6 In the embodiment, the portion of the first terminal plate 131 within the dotted line frame serves as the first main body portion 41 , and the remaining portion of the first terminal plate 131 serves as the first extension portion 51 . Similarly, the second terminal plate 141 includes a second main body portion 42 and a second extension portion 52 .

[0240] exist Figure 6In the specific example shown, the first main portion 41 and the second main portion 42 are formed into a generally rectangular shape with their long sides extending along the second direction Z. The first main portion 41 and the second main portion 42 are aligned along the first direction Y. The first extension portion 51 and the second extension portion 52 are formed into a generally rectangular shape with their long sides extending along the first direction Y. The first extension portion 51 and the second extension portion 52 are aligned along the second direction Z. Thus, along the first direction Y, the first extension portion 51 and the second extension portion 52 are located between the first main portion 41 and the second main portion 42.

[0241] certainly, Figure 6 The figure is only a specific embodiment, and the shapes and arrangement positions of the first main body 41, the first extension 51, the second main body 42, and the second extension 52 are not limited to Figure 6 The embodiment shown.

[0242] In addition, Figure 6 In the illustrated embodiment, the first main portion 41 and the second main portion 42 are arranged relatively compactly along the first direction Y. That is, the first main portion 41 is relatively close to the second extension portion 52, while the second main portion 42 is relatively close to the first extension portion 51. However, the first main portion 41 and the second extension portion 52 may be relatively far apart, while the second main portion 42 and the first extension portion 51 may be relatively far apart.

[0243] Furthermore, in Figure 6 In the illustrated embodiment, along the second direction Z, the second main portion 42 and the outer edge of the first extension portion 51 (the edge close to the long side of the first housing wall 11) are generally flush, and the outer edges of the first main portion 41 and the second extension portion 52 (the edge close to the long side of the first housing wall 11) are generally flush. However, these may not be flush. Alternatively, one of the outer edges of the second main portion 42 and the outer edge of the first extension portion 51 may be closer to the long side of the first housing wall 11, and / or one of the outer edges of the first main portion 41 and the outer edge of the second extension portion 52 may be closer to the long side of the first housing wall 11.

[0244] Thus, the terminal plate can be designed to have a main body portion and an extension portion, which not only ensures a stable connection of the terminal plate to the first housing wall 11, but also increases the heat dissipation area of ​​the electrode terminals, thereby increasing the connection area and reliability between the electrode terminals and the busbar 3. Furthermore, because the first extension portion 51 and the second extension portion 52 are located between the first main body portion 41 and the second main body portion 42 along the first direction Y, the cooperation of the two terminal plates can enhance the bending strength of the region of the first housing wall 11 where the electrode terminals are located.

[0245] In some embodiments, along the second direction Z, the first extending portion 51 and the second extending portion 52 have an overlapping portion.

[0246] Thus, by arranging the first extension portion 51 and the second extension portion 52 to overlap in the second direction Z, the synergistic effect of the two electrode terminals can be utilized to improve the bending strength of the region of the first housing wall 11 where the electrode terminals are located. Furthermore, the first electrode terminal 13 and the second electrode terminal 14 can be arranged as compactly as possible, which facilitates the utilization of the non-electrode terminal-arrangement region of the first housing wall 11 and, in turn, improves the volume utilization of the battery device 100.

[0247] In some embodiments, as Figure 14 As shown, the first electrode terminal 13 also includes a first terminal disc 132, at least a portion of the first terminal disc 132 is arranged on the side of the first shell wall 11 facing the accommodating space 12, and the second electrode terminal 14 also includes a second terminal disc 142, at least a portion of the second terminal disc 142 is arranged on the side of the first shell wall 11 facing the accommodating space 12, the first main body 41 and the first terminal disc 132 are directly connected through the first connecting column 61; the second main body 42 and the second terminal disc 142 are directly connected through the second connecting column 62.

[0248] The first connecting post 61 can be connected to the first main body 41 or the first terminal plate 132 by means of threaded connection, welding, riveting, etc., or can be formed integrally with the first main body 41 or the first terminal plate 132. The second connecting post 62 can be connected similarly to the first connecting post 61. Therefore, the first connecting post 61 is described in detail here, and the detailed description of the second connecting post 62 is omitted.

[0249] In some embodiments, as Figure 14 As shown, the first connecting post 61 is integrally formed with the first terminal plate 132 and extends perpendicularly to the plate surface of the first terminal plate 132. A through-hole is formed in the first main body 41 of the first terminal plate 131. The first connecting post 61 is inserted into the through-hole and fixedly connected to the first main body 41. This allows the first electrode terminal 13 to be assembled to the first housing wall 11. Furthermore, a terminal seal may be further assembled between the first connecting post 61 and the first main body 41.

[0250] Since the terminal plate and the terminal disk can be connected together by the connecting post, they can function as electrode terminals to draw current from the electrode assembly 2. Moreover, the connecting post is provided in the main body, so that the electrode terminal can be reliably fixed to the first housing wall 11 in the main body.

[0251] In some embodiments, a portion of the first main portion 41 and a portion of the second extension portion 52 are disposed between the first abutting wall 151 and the insulating bottom wall 152 .

[0252] like Figure 6As shown, along the wall thickness direction X, a portion of the first main body portion 41 (eg Figure 6 The right end portion of the first main body portion 41 is located between the first abutting wall 151 and the insulating bottom wall 152, and a portion of the second extending portion 52 (eg Figure 6 The left end portion of the second extending portion 52 is located between the first abutting wall 151 and the insulating bottom wall 152 .

[0253] Thus, the first electrode terminal 13 and the second electrode terminal 14 can achieve mutual force transmission through the first main body 41 and the second extension 52. In particular, by blocking the main body and the extension with the first abutting wall, the external force or torque applied to the easily deformed extension can be quickly transmitted to the less easily deformed main body, thereby jointly resisting the external force or torque and improving the overall strength of the electrode terminal.

[0254] In some embodiments, a portion of the second body portion 42 and a portion of the first extension portion 51 are disposed between the first abutting wall 151 and the insulating bottom wall 152 .

[0255] like Figure 6 As shown, along the wall thickness direction X, a portion of the second main body portion 42 (eg Figure 6 The left end portion of the second main body portion 42 is located between the first abutting wall 151 and the insulating bottom wall 152, and a portion of the first extending portion 51 (eg Figure 6 The right end portion of the first extending portion 51 is located between the first abutting wall 151 and the insulating bottom wall 152 .

[0256] Thus, the first electrode terminal 13 and the second electrode terminal 14 can achieve mutual force transmission through the second main body 42 and the first extension 51. In particular, by blocking the main body and the extension with the first abutting wall, the external force or torque applied to the easily deformable extension can be quickly transmitted to the less easily deformed main body, thereby jointly resisting the external force or torque and improving the overall strength of the electrode terminal.

[0257] In some embodiments, a portion of the first extension portion 51 and a portion of the second extension portion 52 are disposed between the first abutting wall 151 and the insulating bottom wall 152 .

[0258] like Figure 6 As shown, along the wall thickness direction X, a portion of the first extension portion 51 (eg Figure 6 The lower end of the first extension portion 51 is located between the first abutting wall 151 and the insulating bottom wall 152, and a portion of the second extension portion 52 (eg Figure 6 The upper end portion of the second extending portion 52 is located between the first abutting wall 151 and the insulating bottom wall 152 .

[0259] Thus, the first electrode terminal 13 and the second electrode terminal 14 can achieve mutual force transmission through the second extension portion 52 and the first extension portion 51. In particular, by blocking the first extension portion and the second extension portion with the first abutting wall, the external force or torque applied to the easily deformable extension portion can be quickly transmitted to the other electrode terminal, thereby jointly resisting the external force or torque and improving the overall strength of the electrode terminals.

[0260] In some embodiments, the first insulating member 15 also includes at least one second abutting wall 154 connected to the insulating bottom wall 152, and along the wall thickness direction X of the first shell wall 11, the projections of the second abutting wall 154, the first main body 41, and the insulating bottom wall 152 in the same projection plane partially overlap; and / or, along the wall thickness direction X of the first shell wall 11, the projections of the second abutting wall 154, the first extension portion 51, and the insulating bottom wall 152 in the same projection plane partially overlap; and / or, along the wall thickness direction X of the first shell wall 11, the projections of the second abutting wall 154, the second main body 42, and the insulating bottom wall 152 in the same projection plane partially overlap; and / or, along the wall thickness direction X of the first shell wall 11, the projections of the second abutting wall 154, the second extension portion 52, and the insulating bottom wall 152 in the same projection plane partially overlap.

[0261] like Figure 6 As shown, along the wall thickness direction X, the second abutment wall 154 can have an overlapping portion with any one or any several of the first main body portion 41, the second main body portion 42, the first extension portion 51 or the second extension portion 52. Furthermore, along the wall thickness direction X, the second abutment wall 154 can have an overlapping portion with the first main body portion 41, the second main body portion 42, the first extension portion 51 and the second extension portion 52.

[0262] The addition of the second abutting wall 154 can better enable the first electrode terminal 13 and the second electrode terminal 14 to achieve force transmission in the wall thickness direction X, further enhancing the bending strength of the first electrode terminal 13 and the second electrode terminal 14. Furthermore, the above arrangement is flexible, increasing the degree of freedom in the placement of the second abutting wall 154.

[0263] In some embodiments, the first extension portion 51 is offset relative to the center position of the first main body portion 41 along the width direction of the first shell wall 11; and / or, the second extension portion 52 is offset relative to the center position of the second main body portion 42 along the width direction of the first shell wall 11.

[0264] like Figure 5As shown, the position of the dotted line L represents the center position of the first main portion 41 along the second direction Z, the dotted line L1 represents the center position of the first extension portion 51 along the second direction Z, and the dotted line L2 represents the center position of the second extension portion 52 along the second direction Z. The offset distance can be 15% to 27% of the width of the first housing wall 11.

[0265] Thus, the dimension of the first housing wall 11 along the second direction Z can be fully utilized to arrange the first extension portion 51 and the second extension portion 52 along the width direction of the second direction Z, which is beneficial for compactly arranging the first electrode terminal 13 and the second electrode terminal 14 .

[0266] A second aspect of the present application provides a battery device 100 , which includes a box and at least two battery cells 10 provided in the first aspect.

[0267] This can improve the bending strength of the electrode terminal, simplify the number of parts, and reduce production costs.

[0268] In some embodiments, at least one box wall of the box body has a boss 111a, which is formed by the box wall bulging in a direction away from the battery cell 10. The boss 111a forms a receiving portion 111b on the side facing the battery cell 10. Along the direction perpendicular to the box wall on which the boss 111a is formed, the projections of the first electrode terminal 13, the second electrode terminal 14 and the first insulating member 15 do not exceed the projection of the boss 111a, and the first electrode terminal 13, the second electrode terminal 14 and the first insulating member 15 are at least partially received in the receiving portion 111b.

[0269] Thus, only the height of the box body where the first electrode terminal 13 and the second electrode terminal 14 are located can be increased, thereby reducing the size of the battery device 100 and improving the volume utilization of the battery device 100 .

[0270] A third aspect of the present disclosure provides an electrical device, which includes a plurality of battery cells 10 provided in the first aspect or a battery device 100 provided in the second aspect. The battery cells 10 or the battery device 100 are used to store or provide electrical energy.

[0271] Thus, an electric device equipped with a battery device 100 in which the electrode terminals of the battery cells 10 are not easily bent or deformed to a small extent can be provided, thereby improving the reliability of the electric device and reducing the maintenance time of the electric device.

[0272] A fourth aspect of the present application provides an energy storage device, which includes a plurality of battery cells 10 provided in the first aspect or a battery device 100 provided in the second aspect. The battery cells 10 or the battery device 100 are used to store or provide electrical energy.

[0273] Thus, an energy storage device using a battery device 100 in which the electrode terminals of the battery cells 10 are not easily bent or deformed to a small extent can be provided, thereby improving the reliability of the energy storage device and reducing the maintenance time of the energy storage device.

[0274] In a specific embodiment, for example Figures 6 to 9 As shown, Figure 7 As shown in the figure, an upper plastic (first insulating member 15) is provided between the positive and negative electrode riveted blocks (first terminal plate 131 and second terminal plate 141) and the top cover (first shell wall 11) as an insulating component, and the plastic wrap (first connecting wall 153 and first abutting wall 151) both wrap the positive and negative electrode riveted blocks; in the area where the positive and negative electrodes are close to each other, such as Figure 6 As shown, the plastic will extend between the pole rivet blocks and wrap around the top of the pole rivet blocks (e.g. Figure 8 As shown), the positive and negative electrode riveted blocks are fixed together by plastic to improve the overall strength of the pole;

[0275] At the same time, in order to ensure the strength of the plastic wrapping, the plastic thickness in the connection area (thickness along the wall thickness direction X) W1 ≥ 0.4 mm or W2 ≥ 0.4 mm, the plastic front wrapping width (for example Figure 8 The length of the overlapping portion of the first abutting wall 151 and the first terminal plate 131 along the wall thickness direction X along the first direction Y) is greater than or equal to 0.3 mm; in the non-positive and negative electrode junction area (for example Figure 6 As shown, the left end or upper end of the first electrode terminal 13, or the right end or lower end of the second electrode terminal 14), the upper plastic is also provided with an area wrapped to the top (the second abutment wall 154 and the second connecting wall 155), and the rivet block is equivalent to being buckled into the inside of the plastic (the second recessed portion 172), which can improve the overall strength performance of the pole.

[0276] The above embodiments are intended only to illustrate the technical solutions of the present application, and are not intended to limit them. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that they may modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. Such modifications or replacements do not deviate from the essence of the corresponding technical solutions and are intended to be included in the scope of the present application. In particular, as long as there is no structural conflict, the various technical features described in the various embodiments may be combined in any manner.

Claims

1. A battery cell, characterized in that: include: A housing having a receiving space, wherein the housing includes a first housing wall; an electrode assembly, at least partially disposed in the accommodation space; a first electrode terminal connected to the electrode assembly and having a first terminal plate; a second electrode terminal connected to the electrode assembly and having a second terminal plate; A first insulating member is provided on the first shell wall, In which, the first terminal plate and the second terminal plate are arranged on the side of the first shell wall facing away from the accommodating space; along the wall thickness direction of the first shell wall, a part of the first insulating member is arranged between the first terminal plate and the first shell wall and between the second terminal plate and the first shell wall.

2. The battery cell according to claim 1, wherein: The first insulating member includes an insulating bottom wall and a first abutting wall connected to each other; The insulating bottom wall is arranged between the first terminal plate and the first shell wall and between the second terminal plate and the first shell wall; along the wall thickness direction of the first shell wall, at least part of the first terminal plate and / or at least part of the second terminal plate are arranged between the first abutting wall and the insulating bottom wall.

3. The battery cell according to claim 2, characterized in that: The first insulating member is fixed to the first terminal plate and the second terminal plate, The first abutting wall abuts against at least a portion of the first terminal plate and / or at least a portion of the second terminal plate.

4. The battery cell according to claim 2, characterized in that: The electrode assembly includes a first electrode piece and a second electrode piece with opposite polarities. The first electrode terminal is electrically connected to the first electrode piece, and the second electrode terminal is electrically connected to the second electrode piece.

5. The battery cell according to claim 2, characterized in that: Along the wall thickness direction of the first shell wall, the projections of the first abutting wall, the first terminal plate and the insulating bottom wall in the same projection plane overlap, and the projections of the first abutting wall, the second terminal plate and the insulating bottom wall in the same projection plane overlap.

6. The battery cell according to claim 5, characterized in that The first abutting wall is connected to the insulating bottom wall via a first connecting wall. The first connecting wall extends along the wall thickness direction; Along a direction perpendicular to the wall thickness direction, the first connecting wall is located between the first terminal plate and the second terminal plate.

7. The battery cell according to claim 5, characterized in that The first insulating member further includes at least one second abutting wall connected to the insulating bottom wall. Along the wall thickness direction of the first housing wall, the projections of the second abutting wall, the first terminal plate, and the insulating bottom wall in the same projection plane partially overlap, and / or, Along the wall thickness direction of the first housing wall, projections of the second abutting wall, the second terminal plate, and the insulating bottom wall in the same projection plane partially overlap.

8. The battery cell according to claim 2, characterized in that The first insulating member further includes a second abutting wall connected to the insulating bottom wall. Along the wall thickness direction of the first shell wall, the projections of the first abutting wall, the first terminal plate and the insulating bottom wall in the same projection plane overlap, and the projections of the second abutting wall, the second terminal plate and the insulating bottom wall in the same projection plane overlap.

9. The battery cell according to claim 8, characterized in that The first abutting wall is connected to the insulating bottom wall via a first connecting wall, and the second abutting wall is connected to the insulating bottom wall via a second connecting wall; The first connecting wall and the second connecting wall extend along the wall thickness direction respectively; Along a direction perpendicular to the wall thickness direction, the first connecting wall and the second connecting wall are both located between the first terminal plate and the second terminal plate.

10. The battery cell according to claim 8, characterized in that The first abutting wall is connected to the insulating bottom wall via a first connecting wall, and the second abutting wall is connected to the insulating bottom wall via a second connecting wall; The first connecting wall and the second connecting wall extend along the wall thickness direction respectively; At least one of the first terminal plate and the second terminal plate is located between the first connecting wall and the second connecting wall in a direction perpendicular to the wall thickness direction.

11. The battery cell according to any one of claims 1 to 10, characterized in that: The first electrode terminal further includes a first terminal disk, at least a portion of which is disposed on a side of the first housing wall facing the accommodation space. The second electrode terminal further includes a second terminal disk, at least a portion of which is disposed on a side of the first housing wall facing the accommodation space. Along the wall thickness direction of the first housing wall, a second insulating member is further provided between the first terminal plate and the first housing wall, and between the second terminal plate and the first housing wall.

12. The battery cell according to claim 5, characterized in that The first terminal plate is provided with a first recessed portion, the second terminal plate is provided with a second recessed portion, the first abutting wall at least partially overlaps with the first recessed portion and the second recessed portion along the wall thickness direction of the first shell wall, and at least part of the first abutting wall cooperates with the first recessed portion and the second recessed portion.

13. The battery cell according to claim 7, characterized in that The first terminal plate is provided with a first recessed portion, the second terminal plate is provided with a second recessed portion, the first abutting wall at least partially overlaps with the first recessed portion and the second recessed portion along the wall thickness direction of the first housing wall, and at least a portion of the first abutting wall cooperates with the first recessed portion and the second recessed portion; The first terminal plate or the second terminal plate is further provided with a third recessed portion, the second abutting wall and the third recessed portion at least partially overlap along the wall thickness direction of the first shell wall, and at least a portion of the second abutting wall cooperates with the third recessed portion.

14. The battery cell according to claim 8, characterized in that The first terminal plate is provided with a first recessed portion, and the second terminal plate is provided with a second recessed portion. The first abutting wall and the first recessed portion at least partially overlap along the wall thickness direction of the first shell wall, and the second abutting wall and the second recessed portion at least partially overlap along the wall thickness direction of the first shell wall. At least a portion of the first abutting wall cooperates with the first recessed portion, and at least a portion of the second abutting wall cooperates with the second recessed portion.

15. The battery cell according to claim 12 or 13, characterized in that: The first recessed portion includes a first step portion and a second step portion, the second recessed portion includes a third step portion and a fourth step portion, the second step portion is provided on a side of the first step portion away from the second recessed portion, and the fourth step portion is provided on a side of the third step portion away from the first recessed portion; The first abutting wall is at least partially accommodated in a step space formed by the first step portion and the third step portion.

16. The battery cell according to any one of claims 12 to 14, characterized in that: Along the wall thickness direction of the first housing wall, the surface of the first abutting wall facing away from the first housing wall does not exceed the surface of the first terminal plate facing away from the housing wall; and / or, Along the wall thickness direction of the first housing wall, the surface of the first abutting wall facing away from the first housing wall does not extend beyond the surface of the second terminal plate facing away from the first housing wall.

17. The battery cell according to claim 13 or 14, characterized in that: Along the wall thickness direction of the first housing wall, the surface of the second abutting wall facing away from the first housing wall does not exceed the surface of the first terminal plate facing away from the housing wall; and / or, Along the wall thickness direction of the first housing wall, the surface of the second abutting wall on the side facing away from the first housing wall does not extend beyond the surface of the second terminal plate on the side facing away from the first housing wall.

18. The battery cell according to claim 17, characterized in that Along the wall thickness direction of the first housing wall, the surface of the first abutting wall facing away from the first housing wall does not exceed the surface of the first terminal plate facing away from the housing wall; and / or, Along the wall thickness direction of the first housing wall, the surface of the first abutting wall facing away from the first housing wall does not extend beyond the surface of the second terminal plate facing away from the first housing wall.

19. The battery cell according to claim 1, characterized in that The first insulating member is an integrally formed member.

20. The battery cell according to claim 19, characterized in that The first insulating member, the first terminal plate and the second terminal plate are integrally formed by injection molding.

21. The battery cell according to claim 5, characterized in that Along the wall thickness direction of the first shell wall, the thickness of the first abutting wall is not less than 0.4 mm.

22. The battery cell according to claim 7, characterized in that Along the wall thickness direction of the first shell wall, the thickness of the second abutting wall is not less than 0.4 mm.

23. The battery cell according to claim 2, characterized in that The first terminal plate includes a first main body portion and a first extension portion connected to each other, The second terminal plate includes a second main body portion and a second extension portion connected to each other, Along the first direction, at least a portion of the first extension portion and at least a portion of the second extension portion are located between the first main body portion and the second main body portion, and the first extension portion and the second extension portion are arranged along the second direction, wherein the first direction and the second direction are perpendicular to each other and are both perpendicular to the wall thickness direction of the first shell wall.

24. The battery cell according to claim 23, characterized in that Along the second direction, the first extension portion and the second extension portion have an overlapping portion.

25. The battery cell according to claim 23, characterized in that The first electrode terminal further includes a first terminal disk, at least a portion of which is disposed on a side of the first housing wall facing the accommodation space. The second electrode terminal further includes a second terminal disk, at least a portion of which is disposed on a side of the first housing wall facing the accommodation space. The first main body and the first terminal plate are directly connected via a first connecting column; The second main body and the second terminal plate are directly connected via a second connecting column.

26. The battery cell according to claim 23, characterized in that Part of the first main body portion and part of the second extension portion are disposed between the first abutting wall and the insulating bottom wall.

27. The battery cell according to claim 23, characterized in that Part of the second main body portion and part of the first extension portion are disposed between the first abutting wall and the insulating bottom wall.

28. The battery cell according to claim 23, characterized in that A portion of the first extension portion and a portion of the second extension portion are disposed between the first abutting wall and the insulating bottom wall.

29. The battery cell according to any one of claims 26 to 28, characterized in that: The first insulating member further includes at least one second abutting wall connected to the insulating bottom wall. Along the wall thickness direction of the first shell wall, the projections of the second abutting wall, the first main body, and the insulating bottom wall in the same projection plane partially overlap; and / or, Along the wall thickness direction of the first shell wall, the projections of the second abutting wall, the first extension portion, and the insulating bottom wall in the same projection plane partially overlap; and / or, Along the wall thickness direction of the first shell wall, the projections of the second abutting wall, the second main body, and the insulating bottom wall in the same projection plane partially overlap; and / or, Along the wall thickness direction of the first housing wall, projections of the second abutting wall, the second extending portion, and the insulating bottom wall in the same projection plane partially overlap.

30. The battery cell according to claim 29, characterized in that The first abutting wall is connected to the insulating bottom wall via a first connecting wall, and the second abutting wall is connected to the insulating bottom wall via a second connecting wall; The first connecting wall and the second connecting wall extend along the wall thickness direction respectively; Along a direction perpendicular to the wall thickness direction, the first connecting wall and the second connecting wall are both located between the first terminal plate and the second terminal plate.

31. The battery cell according to claim 29, characterized in that The first abutting wall is connected to the insulating bottom wall via a first connecting wall, and the second abutting wall is connected to the insulating bottom wall via a second connecting wall; The first connecting wall and the second connecting wall extend along the wall thickness direction respectively; At least one of the first terminal plate and the second terminal plate is located between the first connecting wall and the second connecting wall in a direction perpendicular to the wall thickness direction.

32. The battery cell according to claim 23, characterized in that Along the width direction of the first shell wall, the first extension portion is offset relative to the center position of the first main body portion; and / or, The second extension portion is offset relative to a center position of the second main body portion along a width direction of the first housing wall.

33. A battery device, characterized in that: The invention comprises a box body and at least two battery cells according to any one of claims 1 to 32.

34. The battery device according to claim 33, characterized in that At least one box wall of the box body has a boss, which is formed by the box wall bulging in a direction away from the battery cell, and the boss forms a receiving portion on a side facing the battery cell. Along a direction perpendicular to the box wall on which the boss is formed, the projections of the first electrode terminal, the second electrode terminal and the first insulating member do not exceed the projection of the boss, and the first electrode terminal, the second electrode terminal and the first insulating member are at least partially accommodated in the accommodating portion.

35. An electrical device, characterized in that: The electrical device comprises a plurality of battery cells according to any one of claims 1 to 32, or a battery device according to claim 33 or 34, wherein the battery cells or the battery device are used to store or provide electrical energy.

36. An energy storage device, characterized in that: The energy storage device comprises a plurality of battery cells according to any one of claims 1 to 32, or a battery device according to claim 33 or 34, wherein the battery cells or the battery device are used to store or provide electrical energy.

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