Battery cell, battery device, electric device and energy storage device

Abstract

Provided in the present disclosure are a battery cell, a battery device, an electric device and an energy storage device. The battery cell comprises: a casing, which has an accommodating space, wherein the casing comprises a first casing wall; an electrode assembly, which is at least partially disposed in the accommodating space; a first electrode terminal, which is connected to the electrode assembly and has a first terminal plate; a second electrode terminal, which is connected to the electrode assembly and has a second terminal plate; and a first insulating member, which is disposed on the first casing wall, wherein the first terminal plate and the second terminal plate are disposed on the side of the first casing wall facing away from the accommodating space; in the direction of thickness of the first casing wall, part of the first insulating member is disposed between the first terminal plate and the first casing wall and between the second terminal plate and the first casing wall. Thus, in the battery cell, battery device, electric device and energy storage device provided, electrode terminals have high bending resistance.

Description

Battery cell, battery device, electric device and energy storage device

[0001] Cross-reference to Related Applications

[0002] The present disclosure is based on and claims priority to Chinese Patent Application No. 202421980235.7, filed on August 14, 2024, entitled “Battery cell, battery device, electric device and energy storage device”, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0003] The present disclosure relates to the technical field of batteries, and in particular to a battery cell, a battery device, an electric device and an energy storage device. BACKGROUND

[0004] With the popularization and promotion of the concept of green development, new energy batteries are increasingly widely used in life and industry. For example, new energy vehicles equipped with batteries have been widely used, and batteries are also increasingly used in the field of energy storage and the like.

[0005] In the existing battery system, the battery cell usually includes a shell, an electrode terminal and an insulating piece, etc., wherein the electrode terminal has a deformation or fracture defect. Therefore, how to improve the strength of the electrode terminal is one of the research directions in the industry. SUMMARY

[0006] To solve the above technical problems, the present disclosure provides a battery cell, a battery device, an electric device and an energy storage device capable of improving the strength of the electrode terminal.

[0007] In a first aspect, the present disclosure provides a battery cell, comprising: a shell having a containing space, the shell comprising a first shell wall; an electrode assembly at least partially disposed in the containing 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; and a first insulating piece 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 containing space; and a portion of the first insulating piece is disposed between the first terminal plate and the first shell wall and between the second terminal plate and the first shell wall in a wall thickness direction of the first shell wall.

[0008] Due to the above arrangement, when one electrode terminal is subjected to an external force or torque, the first insulating member can transmit the force acting on the electrode terminal to the other electrode terminal, the two electrode terminals jointly resist the external force or torque, the deformation resistance of the electrode terminals can be enhanced, and the first insulating member is partially arranged between the first terminal plate and the first shell wall and between the second terminal plate and the first shell wall, the first terminal plate and the second terminal plate are both insulated from the first shell wall, the shell is not electrified, and the number of components is reduced.

[0009] In some embodiments, the first insulating member comprises a connected insulating bottom wall and 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; 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 along the wall thickness direction of the first shell wall.

[0010] Due to the above arrangement, when one electrode terminal is subjected to a pulling or extrusion in the wall thickness direction, the first insulating member can transmit the force acting on the electrode terminal to the other electrode terminal, the deformation resistance of the electrode terminals can be enhanced by jointly resisting the external force through the two electrode terminals.

[0011] In some embodiments, the first insulating member is fixedly connected with the first terminal plate and the second terminal plate, and the first abutting wall abuts at least part of the first terminal plate and / or at least part of the second terminal plate.

[0012] Due to the arrangement that the first abutting wall abuts at least part of the first terminal plate and / or at least part of the second terminal plate and is fixedly connected with the first terminal plate and the second terminal plate to form an integral structure, the structural strength is improved, when one electrode terminal is subjected to a pulling or extrusion, the first insulating member can better transmit the force acting on the electrode terminal to the other electrode terminal, and the deformation resistance of the electrode terminals can be further enhanced.

[0013] In some embodiments, the electrode assembly comprises first and second pole pieces with opposite polarities, the first electrode terminal is electrically connected to the first pole piece, and the second electrode terminal is electrically connected to the second pole piece.

[0014] Therefore, in the case that the first and second electrode terminals have opposite polarities, the two electrode terminals can be well insulated from each other and the shell, and the deformation resistance and strength of the electrode terminals can be improved.

[0015] In some embodiments, along the wall thickness direction of the first shell wall, the projection parts of the first abutting wall, the first terminal plate, and the insulating bottom wall in the same projection plane overlap, and the projection parts of the first abutting wall, the second terminal plate, and the insulating bottom wall in the same projection plane overlap.

[0016] Thus, the first terminal plate and the second terminal plate can both be inhibited from deforming in the wall thickness direction by the first abutment wall, so that when the first electrode terminal is subjected to a pulling force in the wall thickness direction, the force received by the first electrode terminal can be better transmitted to the second electrode terminal, and when the second electrode terminal is subjected to a pulling force in the wall thickness direction, the force received by the second electrode terminal can be better transmitted to the first electrode terminal, further enhancing the deformation resistance of the electrode terminals.

[0017] In some embodiments, the first abutment wall is connected to the insulating bottom wall by a first connecting wall, the first connecting wall extending along the wall thickness direction; in a direction perpendicular to the wall thickness direction, the first connecting wall is located between the first terminal plate and the second terminal plate.

[0018] The arrangement of the first connecting wall between the first terminal plate and the second terminal plate can increase the creepage distance between the first electrode terminal and the second electrode terminal, improving insulation reliability. Moreover, through the blocking effect of the first connecting wall, the strength of the first electrode terminal and the second electrode terminal in a direction perpendicular to the wall thickness direction of the first housing wall can be enhanced, reducing the probability of displacement or deformation of the first electrode terminal and the second electrode terminal due to external force pulling.

[0019] In some embodiments, the first insulating member further comprises at least one second abutment wall connected to the insulating bottom wall, in the wall thickness direction of the first housing wall, the projection of the second abutment wall, the first terminal plate, and the insulating bottom wall in the same projection plane overlaps, and / or, in the wall thickness direction of the first housing wall, the projection of the second abutment wall, the second terminal plate, and the insulating bottom wall in the same projection plane overlaps.

[0020] Due to the above arrangement, not only can the external force be transmitted through the first insulating member, so that the two electrode terminals jointly resist the external force, but also the added second abutment wall can further enhance the limiting force on the electrode terminals in the wall thickness direction, thus further enhancing the deformation resistance of the electrode terminals.

[0021] In some embodiments, the first insulating member further comprises a second abutment wall connected to the insulating bottom wall, in the wall thickness direction of the first housing wall, the projection of the first abutment wall, the first terminal plate, and the insulating bottom wall in the same projection plane overlaps, and the projection of the second abutment wall, the second terminal plate, and the insulating bottom wall in the same projection plane overlaps.

[0022] Due to the above arrangement, not only can the external force be transmitted through the first insulating member, so that the two electrode terminals jointly resist the external force, but also the first abutment wall and the second abutment wall can respectively limit the deformation of the electrode terminals in the wall thickness direction, thus further enhancing the deformation resistance of the electrode terminals.

[0023] In some embodiments, the first abutting wall is connected to the insulating bottom wall through a first connecting wall, and the second abutting wall is connected to the insulating bottom wall through a second connecting wall; the first connecting wall and the second connecting wall respectively extend along the wall thickness direction; and in a direction perpendicular to the wall thickness direction, the first terminal plate and the second terminal plate are both located between the first connecting wall and the second connecting wall.

[0024] Through the blocking effect of the two connecting walls on the two electrode terminals respectively, the strength of the first electrode terminal and the second electrode terminal in a direction perpendicular to the wall thickness direction of the first shell wall can be enhanced, and the probability of displacement or deformation of the first electrode terminal and the second electrode terminal due to external force pulling can be reduced.

[0025] In some embodiments, the first abutting wall is connected to the insulating bottom wall through a first connecting wall, and the second abutting wall is connected to the insulating bottom wall through a second connecting wall; the first connecting wall and the second connecting wall respectively extend along the wall thickness direction; and in a 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.

[0026] In this way, the positional freedom of the connecting wall and the abutting wall can be improved.

[0027] In some embodiments, the first electrode terminal further comprises a first terminal disc, at least part of the first terminal disc is arranged on the side of the first shell wall facing the accommodation space, the second electrode terminal further comprises a second terminal disc, at least part of the second terminal disc is arranged on the side of the first shell wall facing the accommodation space, and along the wall thickness direction of the first shell wall, a second insulating member is further arranged between the first terminal disc and the first shell wall and between the second terminal disc and the first shell wall.

[0028] Since the electrode terminal comprises a terminal plate located outside the shell of the battery monomer and a terminal disc located inside the shell, the electrode terminal can be easily connected to the tab of the electrode assembly through the terminal disc, and the heat dissipation, the support to the first shell wall and the connection strength to the bus member can be improved by designing the terminal plate to be larger, and the shape design freedom of the terminal plate and the terminal disc is higher. Moreover, the terminal plate and the terminal disc respectively clamp the first shell wall from the inside and outside of the shell, which can improve the bending strength of the first shell wall. In addition, the second insulating member can electrically insulate the terminal disc from the first shell wall, further improving the insulation reliability.

[0029] In some embodiments, the first terminal plate is provided with a first recess, the second terminal plate is provided with a second recess, the first abutting wall at least partially overlaps the first recess and the second recess along the wall thickness direction of the first shell wall, and at least part of the first abutting wall cooperates with the first recess and the second recess.

[0030] Thus, by cooperation of the first abutment wall with the first recess and the second recess, transmission of force between the first electrode terminal and the second electrode terminal in the wall thickness direction and in a direction perpendicular to the wall thickness direction is facilitated, which is conducive to improving the strength of the first electrode terminal and / or the second electrode terminal; by cooperation of the first abutment wall with the first recess and the second recess, the space occupied by the first abutment wall is reduced, space utilization is improved, and rapid alignment between the two electrode terminals and the first insulating member is facilitated.

[0031] In some embodiments, the first terminal plate is provided with a first recess, the second terminal plate is provided with a second recess, the first abutment wall at least partially overlaps the first recess and the second recess in the wall thickness direction of the first housing wall, and at least a portion of the first abutment wall cooperates with the first recess and the second recess; the first terminal plate or the second terminal plate is further provided with a third recess, the second abutment wall at least partially overlaps the third recess in the wall thickness direction of the first housing wall, and at least a portion of the second abutment wall cooperates with the third recess.

[0032] Thus, by cooperation of the first abutment wall with the first recess and the second recess, and cooperation of the second abutment wall with the third recess, transmission of force between the first electrode terminal and the second electrode terminal in the wall thickness direction and in a direction perpendicular to the wall thickness direction is better achieved, which is conducive to improving the strength of the first electrode terminal and / or the second electrode terminal; by cooperation of the first abutment wall with the first recess and the second recess, and cooperation of the second abutment wall with the third recess, the space occupied by the first abutment wall and the second abutment wall is reduced, space utilization is improved, and rapid alignment between the two electrode terminals and the first insulating member is facilitated.

[0033] In some embodiments, the first terminal plate is provided with a first recess, the second terminal plate is provided with a second recess, the first abutment wall at least partially overlaps the first recess in the wall thickness direction of the first housing wall, and the second abutment wall at least partially overlaps the second recess in the wall thickness direction of the first housing wall, at least a portion of the first abutment wall cooperates with the first recess, and at least a portion of the second abutment wall cooperates with the second recess.

[0034] Thus, by cooperation of the first abutment wall with the first recess, the second abutment wall, and the second recess, transmission of force between the first electrode terminal and the second electrode terminal in the wall thickness direction and in a direction perpendicular to the wall thickness direction is facilitated, which is conducive to improving the strength of the first electrode terminal and / or the second electrode terminal; by cooperation of the first abutment wall, the second abutment wall, and the second recess, the space occupied by the first abutment wall and the second abutment wall is reduced, space utilization is improved, and rapid alignment between the two electrode terminals and the first insulating member is facilitated.

[0035] In some embodiments, the first recess includes a first step portion and a second step portion, the second recess includes a third step portion and a fourth step portion, the second step portion is disposed on a side of the first step portion away from the second recess, and the fourth step portion is disposed on a side of the third step portion away from the first recess; and the first abutment wall is at least partially accommodated in a step space formed by the first step portion and the third step portion.

[0036] In this way, the first abutment wall and the first step portion and the second step portion are matched to better achieve the transmission of force between the first electrode terminal and the second electrode terminal in the wall thickness direction, and to improve the strength of the first electrode terminal and the second electrode terminal; and the first abutment wall and the first step portion and the second step portion are matched to reduce the space occupied by the first abutment wall and to improve the space utilization.

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

[0038] In this way, the space occupied by the first abutment wall can be reduced, the space utilization can be improved, and the influence of the first abutment 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 side of the second abutment wall away from the first shell wall does not exceed the surface of the side of the first terminal plate away from the shell wall; and / or, along the wall thickness direction of the first shell wall, the surface of the side of the second abutment wall away from the first shell wall does not exceed the surface of the side of the second terminal plate away from the first shell wall.

[0040] In this way, the space occupied by the second abutment wall can be reduced, the space utilization can be improved, and the influence of the second abutment wall on the connection between the electrode terminal and the busbar can be reduced.

[0041] In some embodiments, along the wall thickness direction of the first shell wall, the surface of the side of the first abutment wall away from the first shell wall does not exceed the surface of the side of the first terminal plate away from the shell wall; and / or, along the wall thickness direction of the first shell wall, the surface of the side of the first abutment wall away from the first shell wall does not exceed the surface of the side of the second terminal plate away from the first shell wall.

[0042] In this way, the space occupied by the first abutment wall and the second abutment wall can be reduced, the space utilization can be improved, and the influence of the first abutment wall and the second abutment wall on the connection between the electrode terminal and the busbar can be reduced.

[0043] In some embodiments, the first insulating member is a one-piece molded member.

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

[0045] In some embodiments, the first insulating member is an integrally injection molded member with the first terminal plate and the second terminal plate.

[0046] It is beneficial to reduce the number of parts, improve assembly efficiency, and reduce production cost.

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

[0048] In this way, the strength of the first abutting wall portion can be improved, and the first abutting wall portion can be prevented from being cracked when the electrode terminal is subjected to excessive force, so that the force acting on one of the electrode terminals can be better transmitted to the other electrode terminal.

[0049] In some embodiments, along the wall thickness direction of the first housing wall, the thickness of the second abutting wall is not less than 0.4mm.

[0050] In this way, the strength of the second abutting wall portion can be improved, and the second abutting wall portion can be prevented from being cracked when the electrode terminal is subjected to excessive force, so that the force acting on one of the electrode terminals can be better transmitted to the other electrode terminal.

[0051] In some embodiments, the first terminal plate includes a first main body portion and a first extension portion connected to each other, and the second terminal plate includes a second main body portion and a second extension portion connected to each other, at least part of the first extension portion and at least part of the second extension portion are located between the first main body portion and the second main body portion along a first direction, 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 perpendicular to the wall thickness direction of the first housing wall.

[0052] In this way, by arranging the first extension portion and the second extension portion to overlap in the second direction, the bending strength of the region in the first housing wall where the electrode terminals are arranged can be improved by the synergistic effect of the two electrode terminals. Moreover, the first electrode terminal and the second electrode terminal can be arranged as compactly as possible, which is beneficial to the utilization of the non-electrode terminal arrangement region of the first housing wall, and further beneficial to the volume utilization rate of the battery pack.

[0053] In some embodiments, along the second direction, the first extension portion and the second extension portion have an overlapping portion.

[0054] Thus, by arranging the first extension portion and the second extension portion to overlap in the second direction, the structural strength, the structural rigidity of the region of the first housing wall where the electrode terminals are arranged can be improved by the synergy of the two electrode terminals, and the bending resistance can be further improved. Moreover, the first electrode terminal and the second electrode terminal can be arranged as compactly as possible, which is conducive to the utilization of the region of the first housing wall where no electrode terminals are arranged, and is conducive to improving the volume utilization rate of the battery pack.

[0055] In some embodiments, the first electrode terminal further comprises a first terminal disc, at least part of the first terminal disc is arranged on the side of the first housing wall facing the accommodation space, the second electrode terminal further comprises a second terminal disc, at least part of the second terminal disc is arranged on the side of the first housing wall facing the accommodation space, the first main body portion and the first terminal disc are directly connected by a first connecting column, and the second main body portion and the second terminal disc are directly connected by a second connecting column.

[0056] Since the terminal plate and the terminal disc can be connected together by the connecting column, the electrode terminals can play a role of leading current from the electrode assembly. Moreover, the connecting column is arranged on the main body portion, so that the electrode terminals can be reliably fixed to the first housing wall at the main body portion.

[0057] In some embodiments, part of the first main body portion and part of the second extension portion are arranged between the first abutment wall and the insulating bottom wall.

[0058] Thus, the first electrode terminal and the second electrode terminal can realize mutual transmission of force through the first main body portion and the second extension portion. In particular, by blocking the main body portion and the extension portion by the first abutment wall, external force or torque received by the extension portion which is easy to deform (e.g., easy to be warped relative to the first housing wall) can be quickly transmitted to the main body portion which is not easy to deform, so as to jointly resist the external force or torque, and improve the strength of the electrode terminals as a whole.

[0059] In some embodiments, part of the second main body portion and part of the first extension portion are arranged between the first abutment wall and the insulating bottom wall.

[0060] Thus, the first electrode terminal and the second electrode terminal can realize mutual transmission of force through the second main body portion and the first extension portion. In particular, by blocking the main body portion and the extension portion by the first abutment wall, external force or torque received by the extension portion which is easy to deform (e.g., easy to be warped relative to the first housing wall) can be quickly transmitted to the main body portion which is not easy to deform, so as to jointly resist the external force or torque, and improve the strength of the electrode terminals as a whole.

[0061] In some embodiments, part of the first extension portion and part of the second extension portion are arranged between the first abutment wall and the insulating bottom wall.

[0062] Thus, the first electrode terminal and the second electrode terminal can realize mutual transmission of force through the second extension part and the first extension part. In particular, by blocking the first extension part and the second extension part through the first abutting wall, external force or torque borne by the extension part (e.g., easy to be warped relative to the first shell wall) that is easy to deform can be quickly transmitted to the other electrode terminal, thereby resisting the external force or torque together, improving the strength of the electrode terminal as a whole.

[0063] In some embodiments, the first insulating piece further comprises at least one second abutting wall connected with the insulating bottom wall, and the projection parts of the second abutting wall, the first main body part, and the insulating bottom wall in the same projection plane overlap in the wall thickness direction of the first shell wall; and / or, the projection parts of the second abutting wall, the first extension part, and the insulating bottom wall in the same projection plane overlap in the wall thickness direction of the first shell wall; and / or, the projection parts of the second abutting wall, the second main body part, and the insulating bottom wall in the same projection plane overlap in the wall thickness direction of the first shell wall; and / or, the projection parts of the second abutting wall, the second extension part, and the insulating bottom wall in the same projection plane overlap in the wall thickness direction of the first shell wall.

[0064] By additionally providing the second abutting wall, the first electrode terminal and the second electrode terminal can better realize transmission of force in the wall thickness direction, further enhancing the bending strength of the first electrode terminal and the second electrode terminal. Moreover, the above arrangement is flexible, improving the degree of freedom of the position of the second abutting wall.

[0065] In some embodiments, the first extension part is arranged offset from the center position of the first main body part in the width direction of the first shell wall; and / or, the second extension part is arranged offset from the center position of the second main body part in the width direction of the first shell wall.

[0066] Thus, the first extension part and the second extension part can be arranged in the width direction along the second direction by making full use of the size of the first shell wall in the second direction, which is conducive to compactly arranging the first electrode terminal and the second electrode terminal.

[0067] The second aspect of the present disclosure provides a battery device, which comprises a box body and at least two battery monomers provided by the first aspect.

[0068] As a result, the bending strength of the electrode terminal can be improved, and the number of parts can be simplified, thereby reducing production costs.

[0069] In some embodiments, at least one of the box walls of the box has a boss formed by bulging the box wall in a direction away from the battery cell, the boss forms a receiving portion on a side facing the battery cell, and the projections of the first electrode terminal, the second electrode terminal, and the first insulating member do not exceed the projection of the boss in a direction perpendicular to the box wall on which the boss is formed, and the first electrode terminal, the second electrode terminal, and the first insulating member are at least partially received in the receiving portion.

[0070] Thus, the height of the box at the positions of the first electrode terminal and the second electrode terminal can be increased only, thereby reducing the size of the battery device and improving the volume utilization of the battery device.

[0071] A third aspect of the present disclosure provides a power utilization device, which comprises a plurality of the battery cells provided in the first aspect or the battery device provided in the second aspect, and the battery cells or the battery device are used to store or provide electric energy.

[0072] Thus, the power utilization device provided with the battery having the electrode terminal less likely to be bent or less likely to be bent to a great extent can be provided, the use reliability of the power utilization device is improved, and the maintenance time of the power utilization device is reduced.

[0073] A fourth aspect of the present disclosure provides an energy storage device, which comprises a plurality of the battery cells provided in the first aspect or the battery device provided in the second aspect, and the battery cells or the battery device are used to store or provide electric energy.

[0074] Thus, the energy storage device provided with the battery having the electrode terminal less likely to be bent or less likely to be bent to a great extent can be provided, the use reliability of the energy storage device is improved, and the maintenance time of the energy storage device is reduced.

[0075] The beneficial effects of the embodiments of the present disclosure include: improving the deformation resistance of the electrode terminal in the thickness direction, and improving the strength of the electrode terminal.

[0076] The above description is only a summary of the technical solutions of the present disclosure, in order to enable one of ordinary skill in the art to better understand the technical means of the present disclosure and to implement the same according to the contents of the description, and in order to enable the above and other purposes, features and advantages of the present disclosure to be more apparent and easy to understand, the following specific embodiments of the present disclosure are described. BRIEF DESCRIPTION OF DRAWINGS

[0077] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of the preferred embodiments and are not meant to limit the present disclosure. Moreover, the same reference numerals in the drawings indicate the same or similar elements. In the drawings:

[0078] FIG. 1 is a structural schematic diagram of a vehicle according to some embodiments of the present disclosure;

[0079] FIG. 2 is a structural schematic diagram of an energy storage device according to some embodiments of the present disclosure;

[0080] FIG. 3 is a perspective exploded schematic diagram of a battery device according to some embodiments of the present disclosure;

[0081] FIG. 4 is a perspective schematic diagram of a battery cell according to some embodiments of the present disclosure;

[0082] FIG. 5 is a structural schematic diagram of the inside of a battery device according to some embodiments of the present disclosure;

[0083] FIG. 6 is a top view schematic diagram of a first housing wall according to some embodiments of the present disclosure;

[0084] FIG. 7 is an A-A cross-sectional schematic diagram of FIG. 6 according to some embodiments of the present disclosure;

[0085] FIG. 8 is a partial enlarged schematic diagram of an A1 region of FIG. 7 according to some embodiments of the present disclosure;

[0086] FIG. 9 is a partial enlarged schematic diagram of an A2 region of FIG. 7 according to some embodiments of the present disclosure;

[0087] FIG. 10 is a structural schematic diagram of a first housing wall according to some other embodiments of the present disclosure;

[0088] FIG. 11 is a B-B cross-sectional schematic diagram of FIG. 10 according to some embodiments of the present disclosure;

[0089] FIG. 12 is a structural schematic diagram of a first housing wall according to yet some other embodiments of the present disclosure;

[0090] FIG. 13 is a C-C cross-sectional schematic diagram of FIG. 12 according to some embodiments of the present disclosure;

[0091] FIG. 14 is a structural schematic diagram of a first housing wall according to still some other embodiments of the present disclosure;

[0092] FIG. 15 is a D-D cross-sectional schematic diagram of FIG. 14 according to some embodiments of the present disclosure;

[0093] FIG. 16 is an exploded schematic diagram of a first housing wall and components located on the first housing wall according to some embodiments of the present disclosure;

[0094] FIG. 17 is a cross-sectional schematic diagram of a battery device with a boss according to an embodiment of the present disclosure;

[0095] FIG. 18 is an exploded schematic diagram of a first terminal plate, a second terminal plate, and a first insulating member according to some embodiments of the present disclosure.

[0096] Explanation of Reference Numerals 1000 vehicle; 2000 energy storage device; 100 battery device; 200 controller; 300 motor; 400 master control module; 10 battery cell; 20 case; 20A first case; 20B second case; 1 housing; 11 first housing wall; 12 accommodation space; 13 first electrode terminal; 131 first terminal plate; 132 first terminal disc; 14 second electrode terminal; 141 second terminal plate; 142 second terminal disc; 15 first insulating member; 151 first abutting wall; 152 insulating bottom wall; 153 first connecting wall; 154 second abutting wall; 155 second connecting wall; 171 first recessed portion; 1711 first stepped portion; 1712 second stepped portion; 172 second recessed portion; 1721 third stepped portion; 1722 fourth stepped portion; 173 third recessed portion; 2 electrode assembly; 21 first tab; 22 second tab; 3 busbar; 41 first main body portion; 51 first extension portion; 42 second main body portion; 52 second extension portion; 61 first connecting column; 62 second connecting column; 111a boss; 111b accommodation portion; X wall thickness direction; Y first direction; Z second direction. DETAILED DESCRIPTION

[0097] It should be noted that the embodiments and technical features in the present disclosure and the technical features in the embodiments can be combined with each other without conflict, and the detailed description in the specific embodiments should be understood as an explanation of the purpose of the present disclosure, and should not be regarded as an improper limitation of the present disclosure.

[0098] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure; the terms "comprising" and "having," and any variations thereof, as used in the specification and the above description of the drawings, are intended to cover not exclusive inclusions.

[0099] In the description of the present disclosure, the technical terms "first", "second", "third", "fourth" and the like are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the present disclosure, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0100] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present disclosure. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily independent or alternative embodiments to each other. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0101] In the description of the present disclosure, the term "and / or" is merely to describe an association relationship of associated objects, which means that there can be three relationships, for example, A and / or B, which can represent three cases of A existing alone, A and B existing simultaneously, and B existing alone. In addition, the character " / " herein generally represents an "or" relationship between the front and rear associated objects.

[0102] In the description of the embodiments of the present disclosure, the technical terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "circumferential", and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the embodiments of the present disclosure and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, operate or be used in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present disclosure.

[0103] In the description of the present disclosure, unless otherwise explicitly specified and limited, the technical terms "mounting", "connection", "connection", "fixing", and the like should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection; can be direct connection, can also be indirect connection through an intermediate medium, can be internal communication of two elements or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present disclosure can be understood according to the specific circumstances.

[0104] In the description of the present disclosure, unless otherwise explicitly specified and limited, the technical term "contact" should be understood broadly, which can be direct contact or contact through an intermediate medium layer, which can be contact between two objects in contact without mutual force, or contact between two objects in contact with mutual force.

[0105] In the description of the embodiments of the present disclosure, unless otherwise explicitly specified and limited, the technical terms "parallel" and "perpendicular" both allow a certain degree of tolerance and / or error, including approximately parallel and approximately perpendicular.

[0106] Next, the present disclosure will be described in detail.

[0107] With the popularization and popularization of the concept of green development, new energy batteries are more and more widely used in life and industry, for example, new energy vehicles equipped with batteries have been widely used, in addition, battery devices are also more and more widely used in the field of energy storage and the like.

[0108] In the existing battery system, the battery cell usually includes a shell, an electrode terminal and an insulating piece, etc., but the electrode terminal has the problem of deformation or breakage. In the related art, there are too many parts on the shell, which makes the assembly process not efficient enough and is not conducive to reducing costs. Moreover, the electrode terminal is connected to the shell wall or the top cover in the shell of the battery cell, and the shell wall or the top cover is prone to extrusion deformation. In addition, since the busbar is connected to the electrode terminal, the busbar will pull the electrode terminal due to battery vibration and other reasons, which may sometimes cause the electrode terminal to deform or break. Therefore, how to simplify the parts on the shell while improving the anti-deformation capability of the electrode terminal is one of the research directions in the industry.

[0109] Through research, it is found that when one electrode terminal is subjected to pulling or extrusion, the force or torque acting on this electrode terminal is transmitted to another electrode terminal, which can enhance the anti-deformation capability of the electrode terminal. If the insulating piece is used to transmit the force between different electrode terminals, the number of parts can be simplified and the assembly efficiency can be improved.

[0110] Based on such a technical concept, the present disclosure provides a battery cell, which includes a shell having a containing space, the shell including a first shell wall; an electrode assembly at least partially disposed in the containing 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; and a first insulating piece 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 containing space; and a portion of the first insulating piece is disposed between the first terminal plate and the first shell wall and between the second terminal plate and the first shell wall along the thickness direction of the first shell wall.

[0111] Therefore, when one electrode terminal is subjected to an external force or torque, the first insulating piece can transmit the force acting on this electrode terminal to another electrode terminal, and the two electrode terminals jointly resist the external force or torque, which can enhance the anti-deformation capability of the electrode terminal. Moreover, a portion of the first insulating piece 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, and can make the shell not electrified and simplify the number of parts.

[0112] In the embodiments of the present disclosure, the battery cell can be a secondary battery, which refers to a battery cell that can be activated by charging after discharging to continue to be used.

[0113] The battery cell can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel-hydrogen battery, a nickel-cadmium battery, a lead-acid battery, etc., and the embodiments of the present disclosure are not limited thereto.

[0114] The technical solutions described in the embodiments of the present disclosure are applicable to various electric devices using battery monomers or battery devices, such as mobile phones, portable devices, notebook computers, electric vehicles, electric toys, electric tools, vehicles, ships, and spacecraft, such as aircraft, rockets, space shuttles, and spacecraft.

[0115] The technical solutions described in the embodiments of the present disclosure are also applicable to energy storage devices. The energy storage device can be used in energy storage power stations, wind power systems, solar power systems, mobile power systems, or temporary power supply systems, etc. The energy storage device can store electrical energy as needed and output electrical energy at an appropriate time. For example, the energy storage device can store electrical energy during the low electricity consumption period, and provide electrical energy for related users or electrical equipment during the peak electricity consumption period. The energy storage system provided by the embodiments of the present disclosure can be any power system that needs to use an energy storage device.

[0116] For convenience of description, the electric device of some embodiments of the present disclosure is taken as a vehicle 1000 for example. The following is described in conjunction with the drawings.

[0117] FIG. 1 is a structural schematic diagram of a vehicle provided by some embodiments of the present disclosure. The vehicle 1000 can be a fuel automobile, a gas automobile, or a new energy automobile, which can be a pure electric automobile, a hybrid electric automobile, or a range extended automobile, etc. As shown in FIG. 1, the vehicle 1000 is internally provided with a battery device 100, which can be arranged at the bottom, the head, or the tail of the vehicle 1000. The battery device 100 can be used for power supply of the vehicle 1000, for example, the battery device 100 can be used as an operating power source of the vehicle 1000. The vehicle 1000 can further include a controller 200 and a motor 300, the controller 200 being used to control the battery device 100 to supply power to the motor 300, for example, for the working power demand of the vehicle 1000 during starting, navigation, and driving.

[0118] In some embodiments of the present disclosure, the battery device 100 can not only be used as an operating power source of the vehicle 1000, but also be used as a driving power source of the vehicle 1000, instead of or partially instead of fuel or natural gas to provide driving power for the vehicle 1000.

[0119] FIG. 2 is a structural schematic diagram of an energy storage device 2000 provided by some embodiments of the present disclosure. The energy storage device 2000 includes one or more battery clusters to improve the voltage and capacity of the energy storage device. The battery cluster can include a plurality of battery devices 100, and the plurality of battery devices 100 are connected in series through a busbar component to improve the voltage of the energy storage device. When the energy storage device includes a plurality of battery clusters, the plurality of battery clusters are connected in parallel to improve the capacity of the energy storage device.

[0120] In some embodiments, the energy storage device 2000 is an energy storage container or an energy storage cabinet.

[0121] In some embodiments, the energy storage device can include a cabinet and one or more battery assemblies, the battery assemblies housed in the cabinet.

[0122] In some embodiments, the energy storage device can include a thermal management module, a master control module, a general control module 400, a power distribution module, a fire control module, and the like.

[0123] FIG. 3 is a perspective exploded view of a battery apparatus, according to some embodiments of the present disclosure. As shown in FIG. 3, the battery apparatus 100 includes a cabinet 20, which can include a first cabinet 20A and a second cabinet 20B. The first cabinet 20A and the second cabinet 20B are fastened together so that an enclosed space is formed inside the cabinet 20 to house the battery cell assemblies. The enclosed here means covered or closed, which can be sealed or unsealed. The first cabinet 20A can be a top cover or a bottom plate.

[0124] As an example, the cabinet can include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected with the frame so that an enclosed space is formed inside the cabinet to house the battery cell assemblies.

[0125] As an example, the cabinet can be part of a chassis structure of a vehicle. For example, the top cover of the cabinet can be at least part of a floor of the vehicle, or the frame of the cabinet can be at least part of a cross beam and a longitudinal beam of the vehicle.

[0126] The battery apparatus mentioned in the embodiments of the present disclosure can include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly can include a plurality of battery cells connected in series, in parallel, or in a mixed connection through busbars (not shown in FIG. 3).

[0127] In some embodiments, the battery cell assembly is generally formed by arranging a plurality of battery cells.

[0128] As an example, the battery cell assembly can be a battery module formed by arranging and fixing a plurality of battery cells into one independent module. As an example, the battery module can be formed by bundling a plurality of battery cells with a cable tie.

[0129] In some embodiments, the battery apparatus can be a battery pack including a cabinet and one or more battery cell assemblies housed in the cabinet.

[0130] As an example, the battery cell assembly can be a battery module, and the battery cell assembly can be accommodated in the case by fixing the battery module in the case.

[0131] As an example, the battery cell assembly can also be accommodated in the case by fixing a plurality of battery cells directly to the case.

[0132] In the following, some embodiments of the present disclosure will be described in detail in conjunction with FIGS. 4-18.

[0133] FIG. 4 is a perspective view of a battery cell 10 according to some embodiments of the present disclosure; FIG. 5 is a structural view of the inside of a battery device 100 according to some embodiments of the present disclosure; FIG. 6 is a top view of a first housing wall 11 according to some embodiments of the present disclosure; FIG. 7 is a cross-sectional view of A-A of FIG. 6 according to some embodiments of the present disclosure; FIG. 8 is a partial enlarged view of an A1 region of FIG. 7 according to some embodiments of the present disclosure; FIG. 9 is a partial enlarged view of an A2 region of FIG. 7 according to some embodiments of the present disclosure; FIG. 10 is a structural view of the first housing wall 11 according to other embodiments of the present disclosure; FIG. 11 is a cross-sectional view of B-B of FIG. 10 according to some embodiments of the present disclosure; FIG. 12 is a structural view of the first housing wall according to further embodiments of the present disclosure; FIG. 13 is a cross-sectional view of C-C of FIG. 12 according to some embodiments of the present disclosure; FIG. 14 is a structural view of the first housing wall according to still further embodiments of the present disclosure; FIG. 15 is a cross-sectional view of D-D of FIG. 14 according to some embodiments of the present disclosure; FIG. 16 is an exploded view of the first housing wall 11 and components positioned at the first housing wall according to some embodiments of the present disclosure; FIG. 17 is a cross-sectional view of a battery device 100 with a boss according to an embodiment of the present disclosure; and FIG. 18 is an exploded view of a first terminal plate 131, a second terminal plate 141, and a first insulating member 15 according to some embodiments of the present disclosure.

[0134] In the description of the embodiments of the present disclosure, the direction of an arrow X represents the "wall thickness direction of the first housing wall 11", the "height direction of the battery cell 10", the direction of an arrow Y represents the "length direction of the first housing wall 11", the "length direction of the battery cell 10", the "first direction", and the direction of an arrow Z represents the "width direction of the first housing wall 11", the "thickness direction of the battery cell 10", the "second direction".

[0135] A first aspect of the present disclosure provides a battery cell 10 as shown in FIGS. 4-18, the battery cell 10 including a case 1 having a housing space 12, the case 1 including a first case wall 11; an electrode assembly 2 disposed at least partially in the housing 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 disposed at the first case wall 11, wherein the first terminal plate 131 and the second terminal plate 141 are disposed at a side of the first case wall 11 facing away from the housing space 12; and a portion of the first insulating member 15 is disposed between the first terminal plate 131 and the first case wall 11 and between the second terminal plate 141 and the first case wall 11 in a wall thickness direction X of the first case wall 11.

[0136] In some embodiments, the battery cell 10 includes the electrode assembly 2 as shown in FIG. 4. The electrode assembly 2 includes a positive electrode sheet, a negative electrode sheet, and a separator. During charging and discharging of the battery cell 10, active ions (e.g., lithium ions) are inserted and extracted between the positive electrode and the negative electrode. The separator is disposed between the positive electrode sheet and the negative electrode sheet, which can prevent the positive and negative electrodes from short-circuiting while allowing the active ions to pass through. In the embodiment shown in FIG. 4, as the electrode assembly 2, two laminated jelly rolls formed by laminating and winding the positive electrode sheet, the negative electrode sheet, and the separator are shown, but the electrode assembly 2 is not limited to the winding structure shown in FIG. 4, and can be, for example, a stacked structure or other structure.

[0137] The electrode assembly 2 is provided with tabs that can conduct current from the electrode assembly 2. The tabs include positive tabs and negative tabs. In the specific embodiment shown in FIG. 4, the electrode assembly 2 is shown as having a first tab 21 and a second tab 22, which are disposed on the same side of the electrode assembly 2 in the wall thickness direction X of the first case wall 11 and are each disposed near one end of the electrode assembly 2 in the length direction of the first case wall 11. Of course, the first tab 21 and the second tab 22 can also be disposed on opposite sides of the electrode assembly 2; the first tab 21 and the second tab 22 can also be disposed near both ends of the electrode assembly 2 in the length direction of the first case wall 11, respectively.

[0138] In some embodiments, the battery cell 10 includes the case 1. The case 1 can be a steel case, an aluminum case, a plastic case (e.g., polypropylene), a composite metal case (e.g., a copper-aluminum composite case), or an aluminum-plastic film, etc. In some embodiments, the case can be a sealed structure or a non-sealed structure. As an example, when the case is a non-sealed structure, the case serves to protect the electrode assembly, and a sealing bag is further included between the case and the electrode assembly, which is used to package the electrode assembly and the electrolyte. Specifically, the sealing bag can be a bag-shaped insulating member or an aluminum-plastic film. When the case is a sealed structure, it is used to package the electrode assembly and the electrolyte, etc.

[0139] As an example, the battery cell 10 can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes, the prismatic battery cell including a square battery cell, a blade battery cell, a multi-prismatic battery cell, for example, a hexagonal battery cell, etc. In the embodiments shown in FIGS. 4-18, for ease of illustration, a square battery cell is taken as an example for illustration.

[0140] In some embodiments, as shown in FIG. 4, the outer shell 1 includes a plurality of shell walls, wherein a part of the shell walls enclose a space with an opening, the opening can be closed by another shell wall (for example, the first shell wall 11) to form a containing space 12 for containing the electrode assembly 2 and electrolyte and other substances. The outer shell 1 can be provided with one or more openings. The shell wall (for example, the first shell wall 11) closing the opening can also be configured as a top cover.

[0141] In some embodiments, as shown in FIG. 4, the outer shell 1 is provided with a first electrode terminal 13 and a second electrode terminal 14, both of which are electrically connected with the tab, which can be directly connected with the tab or indirectly connected with the tab through an adapter. For ease of illustration, in the embodiments of the present disclosure, the shell wall where the first electrode terminal 13 and the second electrode terminal 14 are located is referred to as the first shell wall 11.

[0142] Optionally, the first electrode terminal 13 and the second electrode terminal 14 can have the same polarity or opposite polarity. Optionally, both of the electrode terminals can be positive, and the outer shell 1 is negative; both of the electrode terminals can also be negative, and the outer shell 1 is positive; or one of the electrode terminals can be negative, and the other is positive.

[0143] 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, both of which are arranged on the side (for example, the upper side shown in FIG. 4) of the first shell wall 11 away from the containing space 12, and the first electrode terminal 13 and the second electrode terminal 14 also have a part of the structure electrically connected with the tab inside the outer shell 1, and the terminal plate outside the outer shell 1 and the part inside the outer shell 1 are connected, which can be an integral structure, or connected through a connecting column, etc. Optionally, the connecting column can be integrally connected with the terminal plate.

[0144] Optionally, the first terminal plate 131 and the second terminal plate 141 can have the shape of a cuboid, a triangular prism, an "L"-shaped column (for example, as shown in FIG. 4), or other irregular shapes, etc. The first terminal plate 131 and the second terminal plate 141 can have the same shape or different shapes.

[0145] In some embodiments, as shown in FIG. 8 and FIG. 18, a portion of the first insulating member 15 is arranged between the first terminal plate 131 and the first housing wall 11 to insulate the first terminal plate 131 and the first housing wall 11 from each other; and a portion of the first insulating member 15 is also arranged between the second terminal plate 141 and the first housing wall 11 to insulate the second terminal plate 141 and the first housing wall 11 from each other.

[0146] In some specific embodiments, the first electrode terminal 13 and the second electrode terminal 14 are made of conductive metal material, such as copper or aluminum; and the insulating member is made of plastic material.

[0147] 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 arranged between another portion of the first insulating member 15 and the first housing wall 11. As shown in FIG. 4 to FIG. 18, optionally, at least a portion of the first terminal plate 131 can be arranged between another portion of the first insulating member 15 (such as the first abutting wall 151 shown in FIG. 8 or the second abutting wall 154 shown in FIG. 9) and the first housing wall 11; at least a portion of the second terminal plate 141 can be arranged between another portion of the first insulating member 15 (such as the first abutting wall 151 shown in FIG. 8, the second abutting wall 154 shown in FIG. 11, 13 or 15); at least a portion of the first terminal plate 131 can be arranged between another portion of the first insulating member 15 (such as the first abutting wall 151 shown in FIG. 8 or the second abutting wall 154 shown in FIG. 9) and the first housing wall 11, and at least a portion of the second terminal plate 141 can be arranged between another portion of the first insulating member 15 (such as the first abutting wall 151 shown in FIG. 8 or the second abutting wall 154 shown in FIG. 9) and the first housing wall 11.

[0148] Due to the above arrangement, when one of the electrode terminals is subjected to external force or torque, the first insulating member 15 can transmit the force acting on the electrode terminal to the other electrode terminal, and the two electrode terminals can jointly resist the external force or torque, thereby enhancing the deformation resistance of the electrode terminals. Moreover, the arrangement of the portion of the first insulating member 15 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 can insulate the first terminal plate 131 and the second terminal plate 141 from the first housing wall 11, thereby making the housing not charged and simplifying the number of components.

[0149] In some embodiments, as shown in FIGS. 8, 11, 13 and 15, the first insulation 15 comprises a first abutting wall 151 and an insulation bottom wall 152 connected to each other; the insulation bottom wall 152 is arranged 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; 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 insulation bottom wall 152 along the wall thickness direction X of the first housing wall 11.

[0150] In some embodiments, the insulation bottom wall 152 is arranged 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, so as to insulate the first terminal plate 131 and the second terminal plate 141 from the first housing wall 11.

[0151] Exemplarily, as shown in FIGS. 7, 11, 13 and 15, the insulation bottom wall 152 can be formed in a substantially plate shape and located on the side of the entire first terminal plate 131 and the entire second terminal plate 141 close to the first housing wall 11.

[0152] In some embodiments, the first abutting wall 151 can be one, two, three or four, etc. When the first abutting wall 151 is multiple, the shapes or sizes of the multiple first abutting walls 151 can be the same or different.

[0153] The first abutting wall 151 and the insulation bottom wall 152 can be an integral structure or a split structure. When being an integral structure, it can be integrally injection molded. When being a split structure, it can be indirectly connected.

[0154] As shown in FIGS. 8, 10-15, at least part of the first terminal plate 131 can be located between the first abutment wall 151 and the insulating bottom wall 152. Optionally, one end of the first terminal plate 131 in the first direction Y (e.g., the left end or the right end shown in FIG. 6 or 10) can be located between the first abutment wall 151 and the insulating bottom wall 152, or both ends of the first terminal plate 131 in the first direction Y (e.g., the left end and the right end shown in FIG. 6 or 10) can be located between different first abutment walls 151 and insulating bottom walls 152, respectively, and the overlapping part of the first abutment wall 151 and the first terminal plate 131 in the wall thickness direction X can occupy all or part of the length of the first terminal plate 131 in the second direction Z; of course, one end of the first terminal plate 131 in the second direction Z (e.g., the upper end or the lower end shown in FIG. 6 or 10) can be located between another first abutment wall 151 and insulating bottom wall 152, or both ends of the first terminal plate 131 in the second direction Z (e.g., the upper end and the lower end shown in FIG. 6 or 10) can be located between different first abutment walls 151 and insulating bottom walls 152, respectively, and the overlapping part of the first abutment wall 151 and the first terminal plate 131 in the wall thickness direction X can occupy all or part of the length of the first terminal plate 131 in the first direction Y.

[0155] Further, the length of the overlapping part of the first terminal plate 131 and the first abutment wall 151 in the wall thickness direction X in a direction perpendicular to the wall thickness direction X (e.g., the first direction Y or the second direction Z) is greater than or equal to 0.3 mm.

[0156] As shown in FIGS. 6 and 10, at least part of the second terminal plate 141 can be located between the first abutment wall 151 and the insulating bottom wall 152. Optionally, one end of the second terminal plate 141 in the first direction Y (e.g., the left end shown in FIG. 6) can be located between the first abutment wall 151 and the insulating bottom wall 152, and the overlapping part of the first abutment wall 151 and the second terminal plate 141 in the wall thickness direction X can occupy all or part of the length of the second terminal plate 141 in the second direction Z; of course, one end of the second terminal plate 141 in the second direction Z (e.g., the lower end shown in FIG. 6) can be located between another first abutment wall 151 and insulating bottom wall 152, and the overlapping part of the first abutment wall 151 and the first terminal plate 131 in the wall thickness direction X can occupy all or part of the length of the first terminal plate 131 in the first direction Y.

[0157] Further, the length of the overlapping part of the second terminal plate 141 and the first abutment wall 151 in the wall thickness direction X in a direction perpendicular to the wall thickness direction X (e.g., the first direction Y or the second direction Z) is greater than or equal to 0.3 mm.

[0158] In one specific embodiment, as shown in FIG. 8, at least part of the first terminal plate 131 is located between the first abutting wall 151 and the insulating bottom wall 152, and at least part of the second terminal plate 141 is located between the first abutting wall 151 and the insulating bottom wall 152. In the first direction Y, the end of the first terminal plate 131 close to the second terminal plate 141 (for example, the right end shown in FIG. 8) and the end of the second terminal plate 141 close to the first terminal plate 131 (for example, the left end shown in FIG. 8) are located between the same first abutting wall 151 and the insulating bottom wall 152.

[0159] It should be noted that the end refers to the part of the terminal plate close to the edge, and of course the part from the middle of the terminal plate to the edge can also be referred to as the end, and further, taking FIG. 6 as an example, the part of the first terminal plate 131 / second terminal plate 141 closer to one of the edges in the second direction Z can also be referred to as the end, and of course, the part of the first terminal plate 131 / second terminal plate 141 closer to one of the edges in the first direction Y can also be referred to as the end. In the following embodiments, it will not be described again.

[0160] The abutting area of the first abutting wall 151 to the first terminal plate 131 and the second terminal plate 141 can be the same or different. Generally, it is considered that the larger the abutting area, the more advantageous it is to improve the resistance to external force or torque compared to the smaller abutting area.

[0161] Optionally, in the wall thickness direction X, the surface (for example, the upper surface shown in FIG. 8) of the first abutting wall 151 away from the accommodation space 12 can protrude beyond the surface (for example, the upper surface shown in FIG. 8) of the first terminal plate 131 and / or the second terminal plate 141 away from the accommodation space 12; in the wall thickness direction X, the surface (for example, the upper surface shown in FIG. 8) of the first abutting wall 151 away from the accommodation space 12 can be substantially flush with the surface (for example, the upper surface shown in FIG. 8) of the first terminal plate 131 and / or the second terminal plate 141 away from the accommodation space 12; in the wall thickness direction X, the surface (for example, the upper surface shown in FIG. 8) of the first abutting wall 151 away from the accommodation space 12 can be closer to the accommodation space than the surface (for example, the upper surface shown in FIG. 8) of the first terminal plate 131 and / or the second terminal plate 141 away from the accommodation space 12.

[0162] Due to the above arrangement, when one electrode terminal is pulled or pressed in the wall thickness direction, the first insulating member 15 can transmit the force acting on this electrode terminal to the other electrode terminal, and by the two electrode terminals resisting the external force together, the deformation resistance of the electrode terminal can be enhanced.

[0163] In some embodiments, as shown in FIGS. 6-15, the first insulating member 15 is fixedly connected with the first terminal plate 131 and the second terminal plate 141, and the first abutting wall 151 abuts at least part of the first terminal plate 131 and / or at least part of the second terminal plate 141.

[0164] The fixing manner can be integrally injection molding, bonding, fastening together by connecting columns, etc.

[0165] In some embodiments, the first abutting wall 151 abuts at least part of the first terminal plate 131 and / or at least part of the second terminal plate 141. The abutting here includes the case where the first electrode terminal 13 and / or the second electrode terminal 14 become in abutting with the first abutting wall 151 due to bending deformation, and also includes the case where the first electrode terminal 13 and / or the second electrode terminal 14 are in an abutting state with the first abutting wall 151 due to the pre-tightening force in the initial assembly state.

[0166] Due to the arrangement of the first abutting wall 151 abutting 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 pressed, the first insulating member 15 can better transmit the force acting on this electrode terminal to the other electrode terminal, and can further enhance the deformation resistance of the electrode terminal.

[0167] In some embodiments, as shown in FIG. 4, the electrode assembly 2 includes first and second polar plates with opposite polarities, the first electrode terminal 13 is electrically connected to the first polar plate, and the second electrode terminal 14 is electrically connected to the second polar plate.

[0168] The first and second polar plates are led out by the polar tabs and are directly or indirectly connected with the electrode terminals. As shown in FIG. 4, the polar tabs include first and second polar tabs 21 and 22.

[0169] In some embodiments, the first insulating member 15 is partially arranged between the first electrode terminal 13 and the first housing wall 11. Alternatively, the first and second electrode terminals 13 and 14 are connected with positive and negative polar tabs respectively and have opposite polarities, and the first insulating member 15 is partially arranged between the first and second electrode terminals 13 and 14.

[0170] Alternatively, the first and second electrode terminals 13 and 14 are connected with the same polar tab in the positive and negative polar tabs and have the same polarity, and no insulating member can be arranged between the first and second electrode terminals 13 and 14.

[0171] Therefore, in the case where the first and second electrode terminals 13 and 14 have opposite polarities, the two electrode terminals can be well insulated from each other and the housing, and the deformation resistance and strength of the electrode terminals can be improved.

[0172] In some embodiments, as shown in FIG. 8, along the wall thickness direction X of the first housing wall 11, the projection portions of the first abutment wall 151, the first terminal plate 131 and the insulating bottom wall 152 in the same projection plane overlap, and the projection portions of the first abutment wall 151, the second terminal plate 141 and the insulating bottom wall 152 in the same projection plane overlap.

[0173] In some embodiments, along the wall thickness direction X of the first housing wall 11, the first abutment 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 housing wall 11, the first abutment wall 151, the second terminal plate 141 and the insulating bottom wall 152 have overlapping portions.

[0174] In some specific embodiments, as shown in FIG. 8, along the first direction Y, the end portion (for example, the right end portion shown in FIG. 8) of the first terminal plate 131 close to the second terminal plate 141 and the end portion (for example, the left end portion shown in FIG. 8) of the second terminal plate 141 close to the first terminal plate 131 are located between the same first abutment wall 151 and the insulating bottom wall 152.

[0175] Therefore, the first terminal plate and the second terminal plate can both inhibit deformation in the wall thickness direction through the first abutment wall, so that when the first electrode terminal 13 is subjected to a pulling force in the wall thickness direction X, the force received by the first electrode terminal 13 can be better transmitted 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 received by the second electrode terminal 14 can be better transmitted to the first electrode terminal 13, further enhancing the deformation resistance of the electrode terminal.

[0176] In some embodiments, as shown in FIG. 8 or FIG. 13, the first abutment 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 a 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.

[0177] In some embodiments, the first connecting wall 153 connects the first abutment wall 151 and the insulating bottom wall 152, and the first connecting wall 153, the first abutment wall 151 and the insulating bottom wall 152 can be integrally injection molded.

[0178] Along a 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. Optionally, the first connecting wall 153 can be provided in the portion between the first terminal plate 131 and the second terminal plate 141, and further optionally, the first connecting wall 153 can be provided in the entire region between the first terminal plate 131 and the second terminal plate 141.

[0179] The first connecting wall 153 is arranged between the first terminal plate 131 and the second terminal plate 141, which can increase the creepage distance between the first electrode terminal 13 and the second electrode terminal 14, and improve the insulation reliability. Moreover, the first connecting wall can block the first electrode terminal 13 and the second electrode terminal 14 in the direction perpendicular to the wall thickness direction X of the first shell wall 11, so as to improve the strength of the first electrode terminal 13 and the second electrode terminal 14, and reduce the probability of displacement or deformation of the first electrode terminal 13 and the second electrode terminal 14 due to external force.

[0180] In some embodiments, as shown in FIG. 7 and FIG. 9, the first insulating part 15 further comprises at least one second abutting wall 154 connected with the insulating bottom wall 152, and the projection of the second abutting wall 154, the first terminal plate 131 and the insulating bottom wall 152 in the same projection plane along the wall thickness direction X of the first shell wall 11 overlaps, and / or the projection of the second abutting wall 154, the second terminal plate 141 and the insulating bottom wall 152 in the same projection plane along the wall thickness direction X of the first shell wall 11 overlaps.

[0181] In some embodiments, 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 of the first shell wall 11, and / or the second abutting wall 154, the second terminal plate 141 and the insulating bottom wall 152 have overlapping parts along the wall thickness direction X of the first shell wall 11.

[0182] In some embodiments, the second abutting wall 154 can be one, two, three or four, etc. When the second abutting wall 154 is multiple, the shapes or sizes of the multiple second abutting walls 154 can be the same or different.

[0183] The second abutting wall 154 and the insulating bottom wall 152 can be an integral structure or a split structure. When it is an integral structure, it can be integrally injection molded. When it is a split structure, it can be indirectly connected.

[0184] In some embodiments, as shown in FIG. 6 and FIG. 9, at least a portion of the first terminal plate 131 can be located between the second abutment wall 154 and the insulating bottom wall 152. Optionally, along the wall thickness direction X of the first housing wall 11, the second abutment wall 154, one end portion (e.g., the upper end portion or the lower end portion shown in FIG. 6) of the first terminal plate 131 along the second direction Z, and the projection of the insulating bottom wall 152 in the same projection plane can 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 a portion of the length of the first terminal plate 131 along the first direction Y; of course, the second abutment wall 154, one end portion (e.g., the left end portion or the right end portion shown in FIG. 6) of the first terminal plate 131 along the first direction Y, and the projection of the insulating bottom wall 152 in the same projection plane can also 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 a portion of the length of the first terminal plate 131 along the second direction Z.

[0185] Further, the length of the overlapping portion of the first terminal plate 131 and the second abutment wall 154 along the wall thickness direction X in a direction perpendicular to the wall thickness direction X (e.g., the first direction Y or the second direction Z) is greater than or equal to 0.3 mm.

[0186] In some embodiments, as shown in FIG. 6 and FIG. 9, at least a portion of the second terminal plate 141 can be located between the second abutment wall 154 and the insulating bottom wall 152. Optionally, along the wall thickness direction X of the first housing wall 11, the second abutment wall 154, one end portion (e.g., the left end portion or the right end portion shown in FIG. 6) of the second terminal plate 141 along the first direction Y, and the projection of the insulating bottom wall 152 in the same projection plane can 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 a portion of the length of the second terminal plate 141 along the second direction Z; of course, the second abutment wall 154, one end portion (e.g., the upper end portion and the lower end portion shown in FIG. 6) of the second terminal plate 141 along the second direction Z, and the projection of the insulating bottom wall 152 in the same projection plane can also 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 a portion of the length of the second terminal plate 141 along the first direction Y.

[0187] Further, the length of the overlapping portion of the second terminal plate 141 and the second abutment wall 154 along the wall thickness direction X in a 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.

[0188] Optionally, as shown in FIG. 4 and FIG. 9, along the wall thickness direction X, the surface (e.g., the upper surface shown in FIG. 4) of the second abutting wall 154 on the side away from the accommodation space 12 can protrude beyond the surface (e.g., the upper surface shown in FIG. 4) of the first terminal plate 131 and / or the second terminal plate 141 on the side away from the accommodation space 12; along the wall thickness direction X, the surface (e.g., the upper surface shown in FIG. 4) of the second abutting wall 154 on the side away from the accommodation space 12 can be substantially flush with the surface (e.g., the upper surface shown in FIG. 4) of the first terminal plate 131 and / or the second terminal plate 141 on the side away from the accommodation space 12; along the wall thickness direction X, the surface (e.g., the upper surface shown in FIG. 4) of the second abutting wall 154 on the side away from the accommodation space 12 can be closer to the accommodation space 12 than the surface (e.g., the upper surface shown in FIG. 4) of the first terminal plate 131 and / or the second terminal plate 141 on the side away from the accommodation space 12.

[0189] Thanks to the above arrangement, not only can the external force be transmitted through the first insulating member 15 so that the two electrode terminals jointly resist the external force, but also the added second abutting wall 154 can further enhance the limiting force on the electrode terminals in the wall thickness direction, thus further enhancing the deformation resistance of the electrode terminals.

[0190] In some embodiments, as shown in FIG. 9 to FIG. 15, the first insulating member 15 further comprises a second abutting wall 154 connected to the insulating bottom wall 152, and along the wall thickness direction X of the first housing wall 11, the projection of the first abutting wall 151, the first terminal plate 131, and the insulating bottom wall 152 in the same projection plane overlaps, and the projection of the second abutting wall 154, the second terminal plate 141, and the insulating bottom wall 152 in the same projection plane overlaps.

[0191] In some embodiments, as shown in FIG. 6 and FIG. 8, at least part 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 housing wall 11, the projection of the first abutting wall 151, the first terminal plate 131 on one end portion (e.g., the left end portion or the right end portion shown in FIG. 6) in the first direction Y, and the insulating bottom wall 152 in the same projection plane can overlap, of course, the projection of the first abutting wall 151, the first terminal plate 131 on one end portion (e.g., the upper end portion or the lower end portion shown in FIG. 6) in the second direction Z, and the insulating bottom wall 152 in the same projection plane can overlap.

[0192] In some embodiments, as shown in FIG. 6 and FIG. 9, at least part of the second terminal plate 141 can be located between the second abutment wall 154 and the insulating bottom wall 152. Optionally, along the wall thickness direction X of the first housing wall 11, the second abutment wall 154, the projection of the end portion (e.g. the left end portion or the right end portion shown in FIG. 6) of the second terminal plate 141 along the first direction Y and the projection of the insulating bottom wall 152 can be overlapped in the same projection plane, of course, the projection of the end portion (e.g. the upper end portion or the lower end portion shown in FIG. 6) of the second terminal plate 141 along the second direction Z and the projection of the insulating bottom wall 152 can be overlapped in the same projection plane.

[0193] Due to the above arrangement, not only the external force can be transmitted through the first insulating member 15, so that the two electrode terminals can 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 terminals in the wall thickness direction, so that the deformation resistance of the electrode terminals can be further enhanced.

[0194] In some embodiments, as shown in FIG. 10 and FIG. 11, the first abutment wall 151 is connected with the insulating bottom wall 152 through the first connecting wall 153, and the second abutment wall 154 is connected with the insulating bottom wall 152 through the second connecting wall 155; the first connecting wall 153 and the second connecting wall 155 respectively extend along the wall thickness direction X; along the direction perpendicular to the wall thickness direction X, the first terminal plate 131 and the second terminal plate 141 are both located between the first connecting wall 153 and the second connecting wall 155.

[0195] In some embodiments, the second connecting wall 155 connects the second abutment wall 154 and the insulating bottom wall 152, and the second connecting wall 155, the second abutment wall 154 and the insulating bottom wall 152 can be integrally injection molded.

[0196] In a specific embodiment, as shown in the orientation of FIG. 11, along the second direction Z, between the first connecting wall 153 and the second connecting wall 155 arranged along the second direction Z, there are the first electrode terminal 13 and the second electrode terminal 14; the first abutment wall 151 and the first connecting wall 153 are connected, and the first abutment wall 151 extends along the second direction Z and in the direction close to the first terminal plate 131, so that the first abutment wall 151, the first terminal plate 131 and the insulating bottom wall 152 have an overlapping portion along the wall thickness direction X; the second abutment wall 154 and the second connecting wall 155 are connected, and the second abutment wall 154 extends along the second direction Z and in the direction close to the second terminal plate 141, so that the second abutment wall 154, the first terminal plate 131 and the insulating bottom wall 152 have an overlapping portion along the wall thickness direction X.

[0197] By the blocking effect of the two connecting walls on the two electrode terminals respectively, the strength of the first electrode terminal 13 and the second electrode terminal 14 in the direction perpendicular to the wall thickness direction X of the first housing wall 11 can be enhanced, and the probability of displacement or deformation of the first electrode terminal 13 and the second electrode terminal 14 due to external force pulling can be reduced.

[0198] In some embodiments, as shown in FIG. 14 and FIG. 15, the second connecting wall 155 is located between the first terminal plate 131 and the second terminal plate 141 in the direction perpendicular to the wall thickness direction X. Optionally, the second connecting wall 155 can be provided in part of the region between the first terminal plate 131 and the second terminal plate 141, and further optionally, the second connecting wall 155 can be provided in the entire region between the first terminal plate 131 and the second terminal plate 141.

[0199] In some embodiments, as shown in FIG. 8, FIG. 9, FIG. 12 and FIG. 13, the first connecting wall 153 is located between the first terminal plate 131 and the second terminal plate 141 in the direction perpendicular to the wall thickness direction X. Optionally, the first connecting wall 153 can be provided in part of the region between the first terminal plate 131 and the second terminal plate 141, and further optionally, the first connecting wall 153 can be provided in the entire region between the first terminal plate 131 and the second terminal plate 141.

[0200] In some embodiments, as shown in FIG. 8, FIG. 9, FIG. 12, FIG. 13, FIG. 14 and FIG. 15, 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 respectively extend along the wall thickness direction X; and 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 in the direction perpendicular to the wall thickness direction X.

[0201] In some specific embodiments, as shown in FIG. 7 to FIG. 9 and FIG. 15, the first terminal plate 131 can be located between the first connecting wall 153 and the second connecting wall 155 in the direction perpendicular to the wall thickness direction X. As shown in FIG. 13, the second terminal plate 141 can also be located between the first connecting wall 153 and the second connecting wall 155 in the direction perpendicular to the wall thickness direction X. As shown in FIG. 11, the first electrode terminal 13 and the second terminal plate 141 can also be located between the first connecting wall 153 and the second connecting wall 155 in the direction perpendicular to the wall thickness direction X.

[0202] Thus, the degree of freedom of the arrangement position of the connecting wall and the abutting wall can be improved.

[0203] In some embodiments, as shown in FIG. 16, the first electrode terminal 13 further comprises a first terminal plate 131 located on the side of the first housing wall 11 facing away from the accommodation space 12, and a first terminal disc 132 located on the side of the first housing wall 11 facing the accommodation space 12, and the second electrode terminal 14 further comprises a second terminal plate 141 located on the side of the first housing wall 11 facing away from the accommodation space 12, and a second terminal disc 142 located on the side of the first housing wall 11 facing the accommodation space 12, and further provided between the first terminal disc 132 and the first housing wall 11 and between the second terminal disc 142 and the first housing wall 11 in the wall thickness direction X of the first housing wall 11 is a second insulating member.

[0204] In some embodiments, as shown in FIG. 16, the first electrode terminal 13 further comprises a first terminal plate 131 located on the side of the first housing wall 11 facing away from the accommodation space 12, and a first terminal disc 132 located on the side of the first housing wall 11 facing the accommodation space 12, and the second electrode terminal 14 further comprises a second terminal plate 141 located on the side of the first housing wall 11 facing away from the accommodation space 12, and a second terminal disc 142 located on the side of the first housing wall 11 facing the accommodation space 12, and further provided between the first terminal disc 132 and the first housing wall 11 and between the second terminal disc 142 and the first housing wall 11 in the wall thickness direction X of the first housing wall 11 is a second insulating member.

[0205] The first terminal plate 131 and the second terminal plate 141 are located on the outside of the outer shell 1 of the battery monomer 10, and can be used to connect with the busbar 3 and the like; the first terminal disc 132 and the second terminal disc 142 are located on the inside of the outer shell 1 of the battery monomer 10, and can be used to electrically connect with the tab. The terminal plate and the terminal disc can be of metal material, such as copper, aluminum, etc.

[0206] Optionally, the first terminal plate 131, the second terminal plate 141, the first terminal disc 132, and the second terminal disc 142 each have a generally flat plate shape. The shape of the flat plate can be designed according to the situation, for example, it can be rectangular, circular, L-shaped as shown in FIG. 18, etc.

[0207] Optionally, the first terminal plate 131, the second terminal plate 141, the first terminal disc 132, and the second terminal disc 142 can be fixed together with the first housing wall 11 by connecting columns or the like.

[0208] Since the electrode terminal includes the terminal plate located outside the casing 1 of the battery cell 10 and the terminal disc located inside the casing 1, the electrode terminal can be easily connected with the tab of the electrode assembly 2 through the terminal disc, and the heat dissipation, the support to the first casing wall 11 and the connection strength with the busbar 3 can be improved by designing the terminal plate larger, and the shape design freedom of the terminal plate and the terminal disc is higher. Moreover, the terminal plate and the terminal disc clamp the first casing wall 11 from the inside and outside of the casing 1 respectively, and the bending strength of the first casing wall 11 can be improved.

[0209] In some embodiments, as shown in FIG. 8, the first terminal plate 131 is provided with a first recess 171, the second terminal plate 141 is provided with a second recess 172, the first abutting wall 151 at least partially overlaps the first recess 171 and the second recess 172 along the wall thickness direction X of the first casing wall 11, and at least part of the first abutting wall 151 cooperates with the first recess 171 and the second recess 172.

[0210] The first recess 171 refers to a recess formed with respect to the surface of the first terminal plate 131 and capable of accommodating at least part of the first abutting wall 151. The recess can be formed by a groove or by a step. In the case of being formed by a step, it can include a one-step, a two-step or more steps.

[0211] The second recess 172 refers to a recess formed with respect to the surface of the second terminal plate 141 and capable of accommodating at least part of the first abutting wall 151. The recess can be formed by a groove or by a step. In the case of being formed by a step, it can include a one-step, a two-step or more steps.

[0212] In a specific embodiment, as shown in FIG. 8, along the wall thickness direction X, part of the first abutting wall 151 has an overlapping part with the first recess 171, and another part of the first abutting wall 151 has an overlapping part with the second recess 172.

[0213] In this way, through the cooperation of the first abutting wall 151 with the first recess 171 and the second recess 172, the transmission of the force along the wall thickness direction X and the force in the direction perpendicular to the wall thickness direction between the first electrode terminal 13 and the second electrode terminal 14 is facilitated, which is conducive to improving the strength of the first electrode terminal 13 and / or the second electrode terminal 14; through the cooperation of the first abutting wall 151 with the first recess 171 and the second recess 172, the occupied space of the first abutting wall 151 is reduced, 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, as shown in FIGS. 8 and 9, the first terminal plate 131 is provided with a first recess 171, the second terminal plate 141 is provided with a second recess 172, the first abutting wall 151 at least partially overlaps the first recess 171 and the second recess 172 along the wall thickness direction X of the first housing wall 11, and at least part of the first abutting wall 151 cooperates with the first recess 171 and the second recess 172; the first terminal plate 131 or the second terminal plate 141 is further provided with a third recess 173, and the second abutting wall 154 at least partially overlaps the third recess 173 along the wall thickness direction X of the first housing wall 11, and at least part of the second abutting wall 154 cooperates with the third recess 173.

[0215] As shown in FIG. 9, the third recess 173 refers to a recess formed with respect to the surface of the first terminal plate 131 or the second terminal plate 141, which can accommodate at least part of the second abutting wall 154. The recess can be formed by a groove or by a step. In the case of being formed by a step, it can include a one-step, or a two-step or more steps.

[0216] In a specific embodiment, as shown in FIGS. 6 to 9, along the wall thickness direction X, part of the first abutting wall 151 has an overlapping part with the first recess 171, another part of the first abutting wall 151 further has an overlapping part with the second recess 172, and the second abutting wall 154 has an overlapping part with the third recess 173, wherein the third recess 173 is provided on the first terminal plate 131, of course, the third recess 173 can also be provided on the second terminal plate 141, further, the first terminal plate 131 and the second terminal plate 141 are both provided with the third recess 173.

[0217] Therefore, through the cooperation of the first abutting wall 151 with the first recess 171 and the second recess 172, and the cooperation of the second abutting wall 154 with the third recess 173, the transmission of 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 is better achieved, which is conducive to improving the strength of the first electrode terminal 13 and / or the second electrode terminal 14; through the cooperation of the first abutting wall 151 with the first recess 171 and the second recess 172, and the cooperation of the second abutting wall 154 with the third recess 173, the occupied space of the first abutting wall 151 and the second abutting wall 154 is reduced, the space utilization is improved, and the rapid alignment between the two electrode terminals and the first insulating piece is facilitated.

[0218] In some embodiments, the first terminal plate 131 is provided with a first recess 171, the second terminal plate 141 is provided with a second recess 172, the first abutting wall 151 at least partially overlaps the first recess 171 along the wall thickness direction X of the first shell wall 11, the second abutting wall 154 at least partially overlaps the second recess 172 along the wall thickness direction X of the first shell wall 11, at least part of the first abutting wall 151 cooperates with the first recess 171, and at least part of the second abutting wall 154 cooperates with the second recess 172.

[0219] In some specific embodiments, as shown in FIGS. 11-15, along the wall thickness direction X, part of the first abutting wall 151 overlaps the first recess 171, and part of the second abutting wall 154 overlaps the second recess 172.

[0220] In this way, through the cooperation of the first abutting wall 151 and the first recess 171, and the second abutting wall 154 and the second recess 172, the transmission of 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 is facilitated, which is conducive 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 recess 171, and the second abutting wall 154 and the second recess 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.

[0221] In some embodiments, the first recess 171 includes a first step portion 1711 and a second step portion 1712, the second recess 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 recess 172, and the fourth step portion 1722 is arranged on the side of the third step portion 1721 away from the first recess 171; the first abutting wall 151 is at least partially accommodated in the step space formed by the first step portion 1711 and the third step portion 1721.

[0222] The first step portion 1711 is formed by the part of the first terminal plate 131 that is lowered away from the first shell wall 11 along the wall thickness direction X of the first shell wall 11, as shown in the part of the first terminal plate 131 located in the dashed line frame O2 in FIG. 8; the first terminal plate 131 is further provided with a second step portion 1712 at a position further away from the second recess 172 than the first step portion 1711, as shown in the part of the first terminal plate 131 located in the dashed line frame O1 in FIG. 8, and part of the first abutting wall 151 is accommodated in the first step portion 1711.

[0223] The third stepped 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 in the wall thickness direction X of the first housing wall 11, such as the portion of the second terminal plate 141 in the dashed-line frame O3 in FIG. 8; a fourth stepped portion 1722 is further formed in the second terminal plate 141 at a position further away from the first recessed portion 171 than the third stepped portion 1721, such as the portion of the second terminal plate 141 in the dashed-line frame O4 in FIG. 8, and another portion of the first abutment wall 151 is accommodated in the fourth stepped portion 1722.

[0224] Thus, the force transmission between the first electrode terminal 13 and the second electrode terminal 14 in the wall thickness direction X is better achieved by the cooperation of the first abutment wall 151 with the first stepped portion 1711 and the second stepped portion 1712, and the strength of the first electrode terminal 13 and the second electrode terminal 14 is improved; and the space occupied by the first abutment wall 151 is reduced by the cooperation of the first abutment wall 151 with the first stepped portion 1711 and the second stepped portion 1712, and the space utilization is improved.

[0225] In some embodiments, the surface (such as the upper surface shown in FIG. 8) of the first abutment wall 151 on the side away from the first housing wall 11 in the wall thickness direction X of the first housing wall 11 does not exceed the surface (such as the upper surface shown in FIG. 8) of the first terminal plate 131 on the side away from the housing wall; and / or, the surface (such as the upper surface shown in FIG. 8) of the first abutment wall 151 on the side away from the first housing wall 11 in the wall thickness direction X of the first housing wall 11 does not exceed the surface (such as the upper surface shown in FIG. 8) of the second terminal plate 141 on the side away from the first housing wall 11.

[0226] Thus, the space occupied by the first abutment wall 151 can be reduced, the space utilization is improved, and the influence of the first abutment wall 151 on the connection of the electrode terminals to the busbar 3 can be reduced.

[0227] In some embodiments, the surface (such as the upper surface shown in FIG. 9, FIG. 11, FIG. 13, or FIG. 15) of the second abutment wall 154 on the side away from the first housing wall 11 in the wall thickness direction X of the first housing wall 11 does not exceed the surface (such as the upper surface shown in FIG. 9, FIG. 11, FIG. 13, or FIG. 15) of the first terminal plate 131 on the side away from the housing wall; and / or, the surface (such as the upper surface shown in FIG. 9, FIG. 11, FIG. 13, or FIG. 15) of the second abutment wall 154 on the side away from the first housing wall 11 in the wall thickness direction X of the first housing wall 11 does not exceed the surface (such as the upper surface shown in FIG. 9, FIG. 11, FIG. 13, or FIG. 15) of the second terminal plate 141 on the side away from the first housing wall 11.

[0228] Thus, the second abutting wall 154 can occupy less space, improve space utilization, and reduce the influence of the second abutting wall 154 on the connection of the electrode terminal and the busbar 3.

[0229] In some embodiments, along the wall thickness direction X of the first housing wall 11, the surface (for example, the upper surface shown in FIG. 8) of the side of the first abutting wall 151 away from the first housing wall 11 does not exceed the surface (for example, the upper surface shown in FIG. 8) of the side of the first terminal plate 131 away from the housing wall; and / or, along the wall thickness direction X of the first housing wall 11, the surface (for example, the upper surface shown in FIG. 8) of the side of the first abutting wall 151 away from the first housing wall 11 does not exceed the surface (for example, the upper surface shown in FIG. 8) of the side of the second terminal plate 141 away from the first housing wall 11.

[0230] The surface (for example, the upper surface shown in FIG. 8) of the side of the first abutting wall 151 away from the first housing wall 11 and the surface (for example, the upper surface shown in FIG. 9, FIG. 11, FIG. 13, or FIG. 15) of the side of the second abutting wall 154 away from the first housing wall 11 do not exceed the surface (for example, the upper surface shown in FIG. 8, FIG. 9, FIG. 11, FIG. 13, or FIG. 15) of the side of the first terminal plate 131 away from the first housing wall 11, and the surface (for example, the upper surface shown in FIG. 8) of the side of the first abutting wall 151 away from the first housing wall 11 and the surface (for example, the upper surface shown in FIG. 9, FIG. 11, FIG. 13, or FIG. 15) of the side of the second abutting wall 154 away from the first housing wall 11 do not exceed the surface (for example, the upper surface shown in FIG. 8, FIG. 9, FIG. 11, FIG. 13, or FIG. 15) of the side of the second terminal plate 141 away from the first housing wall 11.

[0231] Thus, the first abutting wall 151 and the second abutting wall 154 can occupy less space, improve space utilization, and reduce the influence of the first abutting wall 151 and the second abutting wall 154 on the connection of the electrode terminal and the busbar 3.

[0232] In some embodiments, as shown in FIG. 8, FIG. 9, and FIG. 18, the first insulating member 15 is a one-piece molded member. That is, 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 molded. Further, 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 molded. As a molding method, a commonly used molding method such as mold molding can be used.

[0233] This is advantageous for reducing the number of components, improving assembly efficiency, and reducing production costs.

[0234] In some embodiments, the first insulating member 15 is an integrally injection molded member with the first terminal plate 131 and the second terminal plate 141.

[0235] This is advantageous in reducing the number of components, improving assembly efficiency, and reducing production costs.

[0236] 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 distance along the wall thickness direction X between the surface of the first abutting wall 151 that is closest to the accommodation space (e.g., the lower surface shown in FIG. 8) and the surface of the first abutting wall 151 that is farthest from the accommodation space (e.g., the upper surface shown in FIG. 8).

[0237] Optionally, along the wall thickness direction X of the first housing wall 11, the thickness W1 of the first abutting wall 151 can be 0.4 mm, 0.41 mm, 0.43 mm, 0.48 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1.0 mm, 2.0 mm, or other values within the above range, while also taking into account the strength of the first terminal plate 131 along the wall thickness direction X of the first housing wall 11.

[0238] This can improve the strength of the first abutting wall 151 portion, and prevent the first abutting wall 151 portion from cracking when the electrode terminal is subjected to excessive force, thereby better transmitting the force acting on one of the electrode terminals to the other electrode terminal.

[0239] In some embodiments, along the wall thickness direction X of the first housing wall 11, the thickness W2 of the second abutting wall 154 is not less than 0.4 mm. The thickness W2 refers to the distance along the wall thickness direction X between the surface of the second abutting wall 154 that is closest to the accommodation space (e.g., the lower surface shown in FIG. 9) and the surface of the second abutting wall 154 that is farthest from the accommodation space (e.g., the upper surface shown in FIG. 8).

[0240] Optionally, along the wall thickness direction X of the first housing wall 11, the thickness W2 of the first abutting wall 151 can be 0.4 mm, 0.41 mm, 0.43 mm, 0.48 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1.0 mm, 2.0 mm, or other values within the above range, while also taking into account the strength of the second terminal plate 141 along the wall thickness direction X of the first housing wall 11.

[0241] Therefore, the strength of the second abutting wall 154 part can be improved, and the second abutting wall 154 part can be prevented from being cracked when the electrode terminal is subjected to excessive force, so that the force acting on one of the electrode terminals can be better transmitted to the other electrode terminal.

[0242] In some embodiments, as shown in FIG. 6, the first terminal plate 131 includes the first main part 41 and the first extension part 51 connected to each other, and the second terminal plate 141 includes the second main part 42 and the second extension part 52 connected to each other, at least part of the first extension part 51 and at least part of the second extension part 52 are located between the first main part 41 and the second main part 42 along the first direction Y, and the first extension part 51 and the second extension part 52 are arranged along the second direction Z, wherein the first direction Y and the second direction Z are perpendicular to each other and both are perpendicular to the wall thickness direction X of the first housing wall 11.

[0243] The first terminal plate 131 includes the first main part 41, in FIG. 6, the part of the first terminal plate 131 located in the dashed line frame is the first main part 41, and the remaining part of the first terminal plate 131 is the first extension part 51. Similarly, the second terminal plate 141 includes the second main part 42 and the second extension part 52.

[0244] In the specific example shown in FIG. 6, the first main part 41 and the second main part 42 are formed in a generally rectangular shape and the long sides thereof extend along the second direction Z, and the first main part 41 and the second main part 42 are arranged along the first direction Y. The first extension part 51 and the second extension part 52 are both formed in a generally rectangular shape and the long sides thereof extend along the first direction Y, and the first extension part 51 and the second extension part 52 are arranged along the second direction Z. Therefore, along the first direction Y, the first extension part 51 and the second extension part 52 are located between the first main part 41 and the second main part 42.

[0245] Of course, FIG. 6 only shows a specific embodiment, and the shapes and arrangement positions of the first main part 41, the first extension part 51, the second main part 42, and the second extension part 52 are not limited to the embodiment shown in FIG. 6.

[0246] In addition, in the specific embodiment shown in FIG. 6, the first main part 41 and the second main part 42 are arranged relatively compactly along the first direction Y, that is, the distance between the first main part 41 and the second extension part 52 is close, and the distance between the second main part 42 and the first extension part 51 is close. However, the distance between the first main part 41 and the second extension part 52 can be far, and the distance between the second main part 42 and the first extension part 51 can be far.

[0247] Further, in the specific embodiment shown in FIG. 6, along the second direction Z, the second body portion 42 is substantially flush with the outer edge of the first extension portion 51 (the edge close to the long side of the first housing wall 11), and the first body portion 41 is substantially flush with the outer edge of the second extension portion 52 (the edge close to the long side of the first housing wall 11). However, it can also not be flush. Alternatively, one of the outer edges of the second body portion 42 and the outer edge of the first extension portion 51 is closer to the long side of the first housing wall 11, and / or one of the outer edges of the first body portion 41 and the outer edge of the second extension portion 52 is closer to the long side of the first housing wall 11.

[0248] The busbar 3 can be connected to at least one of the body portion and the extension portion. For example, for two adjacent battery cells arranged along the second direction Z, the busbar 3 can connect two terminal plates (the middle two) of the four electrode terminals of the two battery cells, i.e., the busbar 3 can be connected to the first terminal plate of one and the second terminal plate of the other, and more specifically, as shown in FIG. 6, the busbar 3 can be connected to the first extension portion of one and the second extension portion of the other.

[0249] In this way, the terminal plate can be designed to have a body portion and an extension portion, which can not only stabilize the connection of the terminal plate relative to the first housing wall 11, but also facilitate increasing the heat dissipation area of the electrode terminal and the connection area and connection reliability of the electrode terminal and the busbar 3. In addition, since the first extension portion 51 and the second extension portion 52 are located between the first body portion 41 and the second body portion 42 along the first direction Y, the bending strength of the region of the first housing wall 11 where the electrode terminal is arranged can be enhanced by the cooperation of the two terminal plates.

[0250] In some embodiments, along the second direction Z, the first extension portion 51 and the second extension portion 52 have an overlapping portion.

[0251] In this way, by arranging the first extension portion 51 and the second extension portion 52 to overlap in the second direction Z, the bending strength of the region of the first housing wall 11 where the electrode terminal is arranged can be improved by the synergistic effect of the two electrode terminals. Moreover, the first electrode terminal 13 and the second electrode terminal 14 can also be arranged as compactly as possible, which facilitates the use of the non-electrode terminal arrangement region of the first housing wall 11, and further facilitates the utilization of the volume of the battery device 100.

[0252] In some embodiments, as shown in FIGS. 6 and 16, the first electrode terminal 13 further includes a first terminal plate 132, at least a portion of the first terminal plate 132 being disposed on the side of the first housing wall 11 facing the accommodation space 12, and the second electrode terminal 14 further includes a second terminal plate 142, at least a portion of the second terminal plate 142 being disposed on the side of the first housing wall 11 facing the accommodation space 12, the first main body portion 41 and the first terminal plate 132 being directly connected by the first connecting column 61, and the second main body portion 42 and the second terminal plate 142 being directly connected by the second connecting column 62.

[0253] The first connecting column 61 can be connected to the first main body portion 41 or the first terminal plate 132 by screwing, welding, riveting, or the like, or can be formed integrally with the first main body portion 41 or the first terminal plate 132. The second connecting column 62 can be connected similarly to the first connecting column 61, and thus, the first connecting column 61 is described in detail here, and detailed description of the second connecting column 62 is omitted.

[0254] In some embodiments, as shown in FIGS. 6 and 16, the first connecting column 61 is formed integrally with the first terminal plate 132 and extends perpendicularly with respect to the plate surface of the first terminal plate 132. The first main body portion 41 in the first terminal plate 131 is formed with a through hole, and the first connecting column 61 is inserted into the through hole and fixedly connected to the first main body portion 41. Thereby, the first electrode terminal 13 can be assembled to the first housing wall 11. In addition, a terminal seal member can be further assembled between the first connecting column 61 and the first main body portion 41.

[0255] Since the terminal plate and the terminal plate can be connected together by the connecting column, the electrode terminal can function to draw current from the electrode assembly 2 as an electrode terminal. Also, the connecting column is provided to the main body portion, and thus the electrode terminal can be reliably fixed to the first housing wall 11 at the main body portion.

[0256] In some embodiments, a portion of the first main body portion 41 and a portion of the second extension portion 52 are disposed between the first abutment wall 151 and the insulating bottom wall 152.

[0257] As shown in FIGS. 6, 8, and 9, in the wall thickness direction X, a portion of the first main body portion 41 (for example, the right end portion of the first main body portion 41 of FIG. 6) is located between the first abutment wall 151 and the insulating bottom wall 152, and a portion of the second extension portion 52 (for example, the left end portion of the second extension portion 52 of FIG. 6) is located between the first abutment wall 151 and the insulating bottom wall 152.

[0258] Thus, the first electrode terminal 13 and the second electrode terminal 14 can realize mutual transmission of force through the first main body portion 41 and the second extension portion 52. In particular, by blocking the main body portion and the extension portion with the first abutment wall, external force or torque received by the easily-deformable extension portion can be quickly transmitted to the not-easily-deformable main body portion, thereby collectively resisting the external force or torque, and improving the strength of the electrode terminal as a whole.

[0259] In some embodiments, a portion of the second main body portion 42 and a portion of the first extension portion 51 are disposed between the first abutment wall 151 and the insulating bottom wall 152.

[0260] As shown in FIG. 6, along the wall thickness direction X, a portion of the first extension portion 51 (e.g., the lower end portion of the first extension portion 51 in FIG. 6) is located between the first abutment wall 151 and the insulating bottom wall 152, and a portion of the second extension portion 52 (e.g., the upper end portion of the second extension portion 52 in FIG. 6) is located between the first abutment wall 151 and the insulating bottom wall 152.

[0261] Thus, the first electrode terminal 13 and the second electrode terminal 14 can realize mutual transmission of force through the second main body portion 42 and the first extension portion 51. In particular, by blocking the main body portion and the extension portion with the first abutment wall, external force or torque received by the easily-deformable extension portion can be quickly transmitted to the not-easily-deformable main body portion, thereby collectively resisting the external force or torque, and improving the strength of the electrode terminal as a whole.

[0262] 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 abutment wall 151 and the insulating bottom wall 152.

[0263] As shown in FIG. 6, along the wall thickness direction X, a portion of the first extension portion 51 (e.g., the lower end portion of the first extension portion 51 in FIG. 6) is located between the first abutment wall 151 and the insulating bottom wall 152, and a portion of the second extension portion 52 (e.g., the upper end portion of the second extension portion 52 in FIG. 6) is located between the first abutment wall 151 and the insulating bottom wall 152.

[0264] Thus, the first electrode terminal 13 and the second electrode terminal 14 can realize mutual transmission of force 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 abutment wall, external force or torque received by the easily-deformable extension portion can be quickly transmitted to the other electrode terminal, thereby collectively resisting the external force or torque, and improving the strength of the electrode terminal as a whole.

[0265] In some embodiments, the first insulating member 15 further comprises at least one second abutting wall 154 connected to the insulating bottom wall 152, and the projection of the second abutting wall 154, the first main body portion 41, and the insulating bottom wall 152 in the same projection plane overlaps in the wall thickness direction X of the first housing wall 11; and / or, the projection of the second abutting wall 154, the first extension portion 51, and the insulating bottom wall 152 in the same projection plane overlaps in the wall thickness direction X of the first housing wall 11; and / or, the projection of the second abutting wall 154, the second main body portion 42, and the insulating bottom wall 152 in the same projection plane overlaps in the wall thickness direction X of the first housing wall 11; and / or, the projection of the second abutting wall 154, the second extension portion 52, and the insulating bottom wall 152 in the same projection plane overlaps in the wall thickness direction X of the first housing wall 11.

[0266] As shown in FIG. 6, the second abutting 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 in the wall thickness direction X, and further, the second abutting wall 154 can have an overlapping portion with each of the first main body portion 41, the second main body portion 42, the first extension portion 51, and the second extension portion 52 in the wall thickness direction X.

[0267] By additionally providing the second abutting wall 154, the first electrode terminal 13 and the second electrode terminal 14 can better realize force transmission in the wall thickness direction X, and further enhance the bending strength of the first electrode terminal 13 and the second electrode terminal 14. Moreover, the above arrangement is flexible, and improves the degree of freedom of the setting position of the second abutting wall 154.

[0268] In some embodiments, the first extension portion 51 is arranged offset relative to the center position of the first main body portion 41 in the width direction of the first housing wall 11; and / or, the second extension portion 52 is arranged offset relative to the center position of the second main body portion 42 in the width direction of the first housing wall 11.

[0269] As shown in FIG. 5, the center position of the first main body portion 41 in the second direction Z is represented by the position where the dashed line L is located, the center position of the first extension portion 51 in the second direction Z is represented by the dashed line L1, and the center position of the second extension portion 52 in the second direction Z is represented by the dashed line L2. The offset distance can be 15% to 27% of the width of the first housing wall 11.

[0270] Thus, the size of the first housing wall 11 in the second direction Z can be fully utilized to arrange the first extension portion 51 and the second extension portion 52 in the width direction of the second direction Z, which is conducive to compactly arranging the first electrode terminal 13 and the second electrode terminal 14.

[0271] The second aspect of the present disclosure provides a battery device 100, the battery device 100 comprising a case and at least two battery cells 10 provided by the first aspect.

[0272] As a result, the bending strength of the electrode terminal can be improved, and the number of parts can be reduced, and the production cost can be reduced.

[0273] In some embodiments, at least one of the case walls of the case has a boss 111a formed by bulging the case wall in a direction away from the battery cell 10, the boss 111a forms a receiving portion 111b on a side facing the battery cell 10, and 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 along a direction perpendicular to the case wall on which the boss 111a is formed, 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.

[0274] As a result, the height of the case at the positions of the first electrode terminal 13 and the second electrode terminal 14 can be increased only, and thus the size of the battery device 100 can be reduced, and the volume utilization of the battery device 100 can be improved.

[0275] The third aspect of the present disclosure provides a power consuming device, the power consuming device comprising a plurality of battery cells 10 provided by the first aspect or a battery device 100 provided by the second aspect, the battery cells 10 or the battery device 100 being used to store or provide electric energy.

[0276] As a result, the power consuming device can be provided, which is equipped with the battery device 100 in which the electrode terminal of the battery cell 10 is less likely to be bent or the degree of bending is small, and the use reliability of the power consuming device is improved, and the maintenance time of the power consuming device can be reduced.

[0277] The fourth aspect of the present disclosure provides an energy storage device, the energy storage device comprising a plurality of battery cells 10 provided by the first aspect or a battery device 100 provided by the second aspect, the battery cells 10 or the battery device 100 being used to store or provide electric energy.

[0278] As a result, the energy storage device can be provided, which is equipped with the battery device 100 in which the electrode terminal of the battery cell 10 is less likely to be bent or the degree of bending is small, and the use reliability of the energy storage device is improved, and the maintenance time of the energy storage device can be reduced.

[0279] In one specific embodiment, as shown in Figs. 6-9, for example, in the orientation shown in Fig. 7, an upper plastic (first insulating member 15) is provided as an insulating component between the positive and negative riveting blocks (first and second terminal plates 131, 141) and the top cover sheet (first housing wall 11), and the plastic wraps (first connecting wall 153 and first abutting wall 151) around the positive and negative riveting blocks; in the area where the positive and negative poles are close to each other, as shown in Fig. 6, the plastic extends between the riveting blocks and wraps around the top of the riveting blocks (for example, as shown in Fig. 8), thereby fixing the positive and negative riveting blocks with the plastic and improving the overall strength of the pole.

[0280] In order to improve the strength of the plastic wrap, the thickness (in the wall thickness direction X) of the plastic in the connecting area is W1≥0.4mm or W2≥0.4mm, and the front plastic wrap width (for example, the length of the overlapping portion of the first abutting wall 151 and the first terminal plate 131 in the wall thickness direction X along the first direction Y as shown in Fig. 8) is greater than or equal to 0.3mm; in the area where the positive and negative poles are not connected (for example, the left or upper end of the first electrode terminal 13 as shown in Fig. 6, or the right or lower end of the second electrode terminal 14), the upper plastic is also provided with a wrapping area to the top (second abutting wall 154 and second connecting wall 155), and the riveting blocks are equivalent to being buckled inside the plastic (second recess 172), which can improve the overall strength performance of the pole.

[0281] The above embodiments are only used to illustrate the technical solutions of the present disclosure, and are not intended to limit the same; although the present disclosure has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements to some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present disclosure, and they should be covered in the scope of the present disclosure. In particular, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any manner.

Claims

1. A battery cell comprising: a case having an accommodation space, the case including a first case 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 disposed between the first case wall and the first terminal plate and between the first case wall and the second terminal plate, wherein the first terminal plate and the second terminal plate are disposed on a side of the first case wall facing away from the accommodation space, and a portion of the first insulating member is disposed between the first terminal plate and the first case wall and between the second terminal plate and the first case wall in a wall thickness direction of the first case wall. 2.The battery cell according to claim 1, wherein the first insulating member includes a first abutting wall and an insulating bottom wall connected to each other, the insulating bottom wall is disposed between the first terminal plate and the first case wall and between the second terminal plate and the first case wall, and at least a portion of the first terminal plate and / or at least a portion of the second terminal plate is disposed between the first abutting wall and the insulating bottom wall in the wall thickness direction of the first case wall. 3.The battery cell according to claim 2, wherein the first insulating member is fixedly connected to the first terminal plate and the second terminal plate, the first abutting wall abuts 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 or 3, wherein the electrode assembly includes first and second polar plates having opposite polarities, the first electrode terminal is electrically connected to the first polar plate, and the second electrode terminal is electrically connected to the second polar plate. 5.The battery cell according to any one of claims 2 to 4, wherein in the wall thickness direction of the first case wall, a projection portion of the first abutting wall, the first terminal plate, and the insulating bottom wall in a same projection plane overlaps, and a projection portion of the first abutting wall, the second terminal plate, and the insulating bottom wall in the same projection plane overlaps. 6.The battery cell according to any one of claims 2 to 5, wherein the first abutting wall is connected to the insulating bottom wall by a first connecting wall, the first connecting wall extends in the wall thickness direction, in 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, wherein the first insulating member further includes at least one second abutting wall connected to the insulating bottom wall, in the wall thickness direction of the first case wall, a projection portion of the second abutting wall, the first terminal plate, and the insulating bottom wall in a same projection plane overlaps, and / or in the wall thickness direction of the first case wall, a projection portion of the second abutting wall, the second terminal plate, and the insulating bottom wall in a same projection plane overlaps. 8.The battery cell according to any one of claims 2 to 4, wherein the first insulating member further includes a second abutting wall connected to the insulating bottom wall, In a wall thickness direction of the first housing wall, projected portions of the first abutment wall, the first terminal plate, and the insulating bottom wall in the same projection plane overlap, and projected portions of the second abutment wall, the second terminal plate, and the insulating bottom wall in the same projection plane overlap.

9. The battery cell according to claim 8, wherein the first abutment wall is connected to the insulating bottom wall by a first connecting wall, and the second abutment wall is connected to the insulating bottom wall by a second connecting wall; the first connecting wall and the second connecting wall each extend in the wall thickness direction; in a direction perpendicular to the wall thickness direction, at least one of the first terminal plate and the second terminal plate is positioned between the first connecting wall and the second connecting wall.

10. The battery cell according to claim 8, wherein the first abutment wall is connected to the insulating bottom wall by a first connecting wall, and the second abutment wall is connected to the insulating bottom wall by a second connecting wall; the first connecting wall and the second connecting wall each extend in the wall thickness direction; in a direction perpendicular to the wall thickness direction, at least one of the first terminal plate and the second terminal plate is positioned between the first connecting wall and the second connecting wall.

11. The battery cell according to any one of claims 1 to 10, wherein the first electrode terminal further includes a first terminal disc, at least a portion of the first terminal disc being provided on a side of the first housing wall facing the accommodation space, and the second electrode terminal further includes a second terminal disc, at least a portion of the second terminal disc being provided on a side of the first housing wall facing the accommodation space, in the wall thickness direction of the first housing wall, a second insulating member is further provided between the first terminal disc and the first housing wall and between the second terminal disc and the first housing wall.

12. The battery cell according to claim 5 or 6, wherein the first terminal plate is provided with a first recess, the second terminal plate is provided with a second recess, at least a portion of the first abutment wall overlaps the first recess and the second recess in the wall thickness direction of the first housing wall, and at least a portion of the first abutment wall cooperates with the first recess and the second recess.

13. The battery cell according to claim 7, wherein the first terminal plate is provided with a first recess, the second terminal plate is provided with a second recess, at least a portion of the first abutment wall overlaps the first recess and the second recess in the wall thickness direction of the first housing wall, and at least a portion of the first abutment wall cooperates with the first recess and the second recess; the first terminal plate or the second terminal plate is further provided with a third recess, at least a portion of the second abutment wall overlaps the third recess in the wall thickness direction of the first housing wall, and at least a portion of the second abutment wall cooperates with the third recess.

14. The battery cell according to any one of claims 8 to 10, wherein the first terminal plate is provided with a first recess, and the second terminal plate is provided with a second recess, The first abutment wall at least partially overlaps the first recess in a wall thickness direction of the first housing wall, and the second abutment wall at least partially overlaps the second recess in a wall thickness direction of the first housing wall, At least a portion of the first abutment wall cooperates with the first recess, and at least a portion of the second abutment wall cooperates with the second recess.

15. The battery cell according to claim 13, wherein The first recess includes a first step portion and a second step portion, and the second recess includes a third step portion and a fourth step portion, the second step portion being disposed on a side of the first step portion away from the second recess, and the fourth step portion being disposed on a side of the third step portion away from the first recess; The first abutment 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 15, wherein In a wall thickness direction of the first housing wall, a surface of a side of the first abutment wall away from the first housing wall does not protrude beyond a surface of a side of the first terminal plate away from the housing wall; and / or In a wall thickness direction of the first housing wall, a surface of a side of the first abutment wall away from the first housing wall does not protrude beyond a surface of a side of the second terminal plate away from the first housing wall.

17. The battery cell according to any one of claims 13 to 15, wherein In a wall thickness direction of the first housing wall, a surface of a side of the second abutment wall away from the first housing wall does not protrude beyond a surface of a side of the first terminal plate away from the housing wall; and / or In a wall thickness direction of the first housing wall, a surface of a side of the second abutment wall away from the first housing wall does not protrude beyond a surface of a side of the second terminal plate away from the first housing wall.

18. The battery cell according to claim 17, wherein In a wall thickness direction of the first housing wall, a surface of a side of the first abutment wall away from the first housing wall does not protrude beyond a surface of a side of the first terminal plate away from the housing wall; and / or In a wall thickness direction of the first housing wall, a surface of a side of the first abutment wall away from the first housing wall does not protrude beyond a surface of a side of the second terminal plate away from the first housing wall.

19. The battery cell according to any one of claims 1 to 18, wherein The first insulating member is a one-piece molded member.

20. The battery cell according to any one of claims 1 to 19, wherein The first insulating member, the first terminal plate, and the second terminal plate are one-piece injection molded members.

21. The battery cell according to any one of claims 5 to 18, wherein In a wall thickness direction of the first housing wall, a thickness of the first abutment wall is not less than 0.4 mm.

22. The battery cell according to any one of claims 7 to 10, 13, 14, 17, and 18, wherein In a wall thickness direction of the first housing wall, a thickness of the second abutment wall is not less than 0.4 mm.

23. The battery cell according to any one of claims 2 to 18, wherein the first terminal plate includes a first body portion and a first extension portion connected to each other, the second terminal plate includes a second body portion and a second extension portion connected to each other, at least part of the first extension portion and at least part of the second extension portion are located between the first body portion and the second body portion along a first direction, 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 a wall thickness direction of the first housing wall.

24. The battery cell according to claim 23, wherein the first extension portion and the second extension portion have an overlapping portion along the second direction.

25. The battery cell according to claim 23 or 24, wherein the first electrode terminal further includes a first terminal disc, at least part of which is provided on a side of the first housing wall facing the accommodation space, and the second electrode terminal further includes a second terminal disc, at least part of which is provided on a side of the first housing wall facing the accommodation space, the first body portion and the first terminal disc are directly connected by a first connecting column, the second body portion and the second terminal disc are directly connected by a second connecting column.

26. The battery cell according to any one of claims 23 to 25, wherein part of the first body portion and part of the second extension portion are provided between the first abutment wall and the insulating bottom wall.

27. The battery cell according to any one of claims 23 to 25, wherein part of the second body portion and part of the first extension portion are provided between the first abutment wall and the insulating bottom wall.

28. The battery cell according to any one of claims 23 to 25, wherein part of the first extension portion and part of the second extension portion are provided between the first abutment wall and the insulating bottom wall.

29. The battery cell according to any one of claims 26 to 28, wherein the first insulating member further includes at least one second abutment wall connected to the insulating bottom wall, in a wall thickness direction of the first housing wall, a projection portion of the second abutment wall, the first body portion, and the insulating bottom wall in a same projection plane overlaps; and / or, in the wall thickness direction of the first housing wall, a projection portion of the second abutment wall, the first extension portion, and the insulating bottom wall in the same projection plane overlaps; and / or, in the wall thickness direction of the first housing wall, a projection portion of the second abutment wall, the second body portion, and the insulating bottom wall in the same projection plane overlaps; and / or, in the wall thickness direction of the first housing wall, a projection portion of the second abutment wall, the second extension portion, and the insulating bottom wall in the same projection plane overlaps.

30. The battery cell according to any one of claims 23 to 29, wherein in a width direction of the first housing wall, the first extension portion is provided offset from a center position of the first body portion; and / or, The second extension portion is offset from a center position of the second main portion in a width direction of the first housing wall.

31. A battery device comprising a case and at least two battery cells according to any one of claims 1 to 30.

32. The battery device according to claim 31, wherein At least one case wall of the case has a boss formed by bulging the case wall toward a direction away from the battery cell, the boss forming a receiving portion on a side toward the battery cell, Along a direction perpendicular to the case wall on which the boss is formed, projections of the first electrode terminal, the second electrode terminal, and the first insulating member do not exceed a 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.

33. An electric device comprising a plurality of battery cells according to any one of claims 1 to 30, or a battery device according to claim 31 or 32, the battery cells or the battery device being used to store or supply electric power.

34. An energy storage device comprising a plurality of battery cells according to any one of claims 1 to 30, or a battery device according to claim 31 or 32, the battery cells or the battery device being used to store or supply electric power.

Images