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

Abstract

The utility model provides a battery monomer, a battery device, a power utilization device and an energy storage device. The battery cell provided by the utility model comprises a shell which is provided with an accommodating space and comprises a first shell wall; at least part of the electrode assembly is arranged in the accommodating space, and the electrode assembly comprises a first tab and a second tab which are opposite in polarity; the first electrode terminal and the second electrode terminal are respectively arranged on the first shell wall, the first electrode terminal is electrically connected with the first tab, and the second electrode terminal is electrically connected with the second tab; the insulating part is at least partially arranged between the first electrode terminal and the second electrode terminal; the part, located between the first electrode terminal and the second electrode terminal, of the insulating part exceeds the upper surfaces of the first electrode terminal and the second electrode terminal in the wall thickness direction of the first shell wall and away from the direction of the containing space. Therefore, the battery cell, the battery device, the power utilization device and the energy storage device which can reduce the overlapping risk between the electrode terminals can be provided.

Description

Technical Field

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

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

[0003] In existing battery systems, the battery typically includes a casing and electrode terminals disposed on the casing. The electrode terminals may include a positive electrode terminal and a negative electrode terminal. How to reduce the short circuit risk of the positive electrode terminal and the negative electrode terminal is one of the research directions in the industry. Utility Model Content

[0004] In order to solve the above technical problems, the present application provides a battery cell, a battery device, an electrical device and an energy storage device that can reduce the risk of short circuit between electrode terminals.

[0005] In a first aspect, an embodiment of the present application provides a battery cell, comprising: a shell having a accommodating space, the shell comprising a first shell wall; an electrode assembly, at least partially disposed in the accommodating space, the electrode assembly comprising a first electrode tab and a second electrode tab with opposite polarities; a first electrode terminal and a second electrode terminal, respectively disposed on the first shell wall, the first electrode terminal being electrically connected to the first electrode tab, and the second electrode terminal being electrically connected to the second electrode tab; an insulating member, at least partially disposed between the first electrode terminal and the second electrode terminal; a portion of the insulating member located between the first electrode terminal and the second electrode terminal, extending beyond the upper surfaces of both the first electrode terminal and the second electrode terminal, along the wall thickness direction of the first shell wall and away from the accommodating space.

[0006] Because the insulating member is partially positioned between the first and second electrode terminals, the risk of short circuits between the first and second electrode terminals is reduced. Even if the first and second electrode terminals are compactly arranged and close to each other over a long distance, short circuits due to creepage and other factors are less likely to occur. Furthermore, since the first and second electrode terminals can be compactly arranged within the same housing wall, the volume utilization of the battery is improved. Furthermore, the insulating member extends beyond the upper surfaces of both the first and second electrode terminals, ensuring reliable insulation between the first and second electrode terminals.

[0007] In some embodiments, the first electrode terminal has a first protrusion protruding from the outer surface of the first shell wall, and the second electrode terminal has a second protrusion protruding from the outer surface of the first shell wall, and a gap is formed between the first protrusion and the second protrusion; the insulating member includes an insulating isolation wall, which is arranged in the gap to isolate the first protrusion and the second protrusion, and the insulating isolation wall extends beyond the first protrusion and the second protrusion along the wall thickness direction of the first shell wall and away from the direction of the accommodating space.

[0008] The insulating barrier disposed between the gap formed by the first and second protrusions not only reduces the risk of short circuits between the first and second electrode terminals, but also allows for a compact arrangement of the first and second electrode terminals. Even if the first and second electrode terminals are positioned close to each other over a long distance, the insulating barrier of a corresponding length can easily isolate the two electrode terminals, reducing the risk of accidental short circuits. Furthermore, the insulating member has a simple structure and is easily assembled with the electrode terminals.

[0009] In some embodiments, the insulating member includes an insulating bottom wall and an insulating isolation wall; the insulating bottom wall is arranged between at least one of the first protrusion and the second protrusion and the first shell wall, and the insulating isolation wall is connected to the insulating bottom wall.

[0010] The insulating bottom wall is disposed between at least one of the first and second protrusions and the first housing wall, insulating the first and second protrusions from the first housing wall. The insulating isolation wall is connected to the insulating bottom wall, thereby enabling a single insulating member to insulate the first or second protrusion from the housing wall and the first and second protrusions from each other, thereby reducing the number of parts, improving assembly efficiency, and lowering production costs.

[0011] In some embodiments, the insulating bottom wall is disposed between the first protrusion, the second protrusion, and the first housing wall, and the insulating bottom wall and the insulating isolation wall are formed as an integral piece.

[0012] The insulating bottom wall is provided between the first protrusion and the second protrusion and the first housing wall, thereby isolating the first protrusion and the second protrusion from the first housing wall. The insulating bottom wall and the insulating isolation wall are formed as a single piece, which can reduce the number of parts and improve assembly efficiency.

[0013] In some embodiments, the insulating member also includes an insulating side wall, which is connected to the insulating bottom wall and extends along the wall thickness direction of the first shell wall. The insulating side wall is arranged around at least one of the first protrusion and the second protrusion, and along the wall thickness direction of the first shell wall, the insulating isolation wall is arranged at a position farther away from the first shell wall than the insulating side wall.

[0014] The insulating sidewall is disposed around at least one of the first and second protrusions, not only circumferentially insulating the first and / or second protrusions and reducing the probability of the first and / or second protrusions being electrically conductive to other components, but also strengthening the first and / or second protrusions in a direction perpendicular to the thickness of the first housing wall (e.g., along the surface of the first housing wall), thereby reducing the probability of the first and / or second protrusions being displaced or deformed due to external forces. The insulating isolation wall is disposed farther from the first housing wall than the insulating sidewall, thereby achieving insulation between the first and second electrode terminals together with the insulating sidewall. Furthermore, since the insulating isolation wall does not need to be disposed starting from the insulating bottom wall, it can save installation space and simplify the overall structure of the insulating member.

[0015] In some embodiments, the insulating side wall includes a first side wall portion and a second side wall portion located in the gap, the first side wall portion is arranged close to the first protrusion, and the second side wall portion is arranged close to the second protrusion. The insulating member also includes a connecting wall, which is mounted on the first side wall portion and the second side wall portion. The insulating isolation wall is arranged on the connecting wall and extends from the connecting wall along the wall thickness direction of the first shell wall in a direction away from the first shell wall.

[0016] The first side wall portion is disposed near the first protrusion, and the second side wall portion is disposed near the second protrusion, thereby increasing the creepage distance on the surface of the first electrode terminal and the second electrode terminal and improving insulation reliability. The provision of insulating side wall portions on the first protrusion and the second protrusion, respectively, not only circumferentially insulates the first protrusion and the second protrusion, reducing the probability of the first protrusion and the second protrusion being electrically conductive to other components, but also strengthens the strength of the first protrusion and the second protrusion in a direction perpendicular to the wall thickness of the first shell wall, reducing the probability of the first protrusion and the second protrusion being deformed by external forces. In addition, because the insulating isolation wall is disposed on the connecting wall and extends from the connecting wall along the wall thickness of the first shell wall in a direction away from the first shell wall, it can save installation space and simplify the overall structure of the insulating component.

[0017] In some embodiments, the insulating member further includes a protruding wall connected to the end of the insulating side wall away from the insulating bottom wall along the wall thickness direction, and along the wall thickness direction of the first shell wall, at least one of the first protrusion and the second protrusion has an overlapping portion with the projection of the protruding wall in the same projection plane.

[0018] The integral structure formed by the protruding wall and the insulating side wall can limit the displacement or bending deformation of the first protrusion and / or the second protrusion along the wall thickness direction of the first shell wall; when the first protrusion and the second protrusion both have overlapping parts with the protruding wall along the wall thickness direction of the first shell wall, when one electrode terminal is subjected to external force or torque, the insulating member can transfer the force or torque acting on this electrode terminal to the other electrode terminal, further enhancing the electrode terminal's anti-deformation ability.

[0019] In some embodiments, the insulating isolation wall is provided on the protruding wall and extends in a direction away from the first shell wall.

[0020] As a result, not only can the short circuit risk between the first protrusion and the second protrusion be reduced, but also when the first electrode terminal and the second electrode terminal are compactly arranged, due to the above arrangement, the length of the overlapping part of the first electrode terminal and the second electrode terminal can be increased, and the risk of overlap between the busbars on the first electrode terminal and the second electrode terminal can be reduced.

[0021] In some embodiments, the insulating isolation wall has at least one reinforcing rib, and the reinforcing rib extends along the wall thickness direction of the first shell wall.

[0022] The insulating isolation wall is provided with at least one reinforcing rib, which can increase the strength of the insulating isolation wall and reduce the risk of the insulating isolation wall being deformed by external force.

[0023] In some embodiments, along the wall thickness direction of the first shell wall and away from the accommodating space, the insulating isolation wall extends beyond both the first protrusion and the second protrusion, and has at least one reinforcing rib at least in the extending portion.

[0024] When the protruding portion has at least one reinforcing rib, when a plurality of battery cells are connected via the busbar, the busbar can be connected and positioned with the electrode terminals via the reinforcing rib, thereby improving the positioning accuracy of the busbar.

[0025] In some embodiments, the reinforcing rib is protruding from a surface of the insulating isolation wall facing the first electrode terminal and / or the second electrode terminal.

[0026] Therefore, the insulating isolation wall can not only insulate the first electrode terminal and the second electrode terminal from each other and reduce the risk of busbar overlap, but also the arrangement of the reinforcing rib protruding from the insulating isolation wall can increase the strength of the insulating isolation wall, improve the positioning accuracy of the busbar, and reduce the number of parts and reduce costs.

[0027] In some embodiments, the first protrusion includes a first main body and a first extension portion connected to each other, the second protrusion includes a second main body and a second extension portion connected to each other, the gap includes a first gap formed between the first extension portion and the second extension portion, and the insulating isolation wall is provided at least in the first gap.

[0028] The protrusion, comprising a main body and an extension, increases the contact area between the terminal plate and air, thereby increasing the contact area between the electrode terminal and air. This increases the heat dissipation area, improves the heat dissipation performance of the electrode terminal, and further enhances the performance of the battery cell. Providing the insulating barrier in at least the first gap reduces the risk of short circuits between the first and second extensions and increases the length of the overlap between the first and second extensions.

[0029] In some embodiments, a second gap is further formed between the first main body portion and the second extension portion, and the insulating isolation wall is provided in the first gap and the second gap.

[0030] The risk of short circuit between the first main body portion and the second extension portion can be reduced, and the length of the overlapping portion of the first main body portion and the second extension portion can be increased.

[0031] In some embodiments, the first main body portion has a first extension portion extending along a first direction, and the second extension portion has a first step portion formed by being partially recessed along the wall thickness direction; along the wall thickness direction, the first extension portion covers a portion of the first step portion from the side away from the first shell wall; and along the first direction, there is a first gap between the first extension portion and a first step surface of the first step portion that is perpendicular to the first direction, wherein the first direction is perpendicular to the wall thickness direction and is consistent with the extension direction of the first extension portion and the second extension portion; the first gap constitutes at least a part of the second gap.

[0032] Thus, the cooperation between the first extension and the first step can limit the bending deformation of the second electrode terminal. Furthermore, the first extension covers a portion of the first step, which not only reduces the space occupied by the first extension and improves space utilization, but also provides an insulating barrier at the first interval to increase the creepage distance between the first and second electrode terminals, improving insulation reliability.

[0033] In some embodiments, a third gap is further formed between the second main body portion and the first extension portion, and the insulating isolation wall is provided in the first gap, the second gap, and the third gap.

[0034] An insulating isolation wall is arranged at the gap between the first protrusion and the second protrusion, which reduces the risk of short circuit between the electrode terminals and is conducive to increasing the size of the overlapping portion of the first protrusion and the second protrusion.

[0035] In some embodiments, the second main body portion has a second extension portion extending along the first direction, and the first extension portion has a second step portion formed by being partially recessed along the wall thickness direction; along the wall thickness direction, the second extension portion covers a portion of the second step portion from the side away from the first shell wall; and along the first direction, there is a second gap between the second extension portion and the second step surface of the second step portion that is perpendicular to the first direction, and the second gap constitutes at least a part of the third gap.

[0036] Thus, the cooperation between the second extension and the second step can limit the bending deformation of the first electrode terminal. Furthermore, the second extension partially covers the second step, which not only reduces the space occupied by the second extension, but also improves space utilization. Providing an insulating barrier at the second interval increases the creepage distance between the first and second electrode terminals, improving insulation reliability.

[0037] In some embodiments, the first gap extends along a first direction, the second gap and the third gap extend along a second direction, the first direction and the second direction are perpendicular to each other and are both perpendicular to the wall thickness direction, and the insulating isolation wall is located in the first gap, the second gap and the third gap and constitutes an integral piece.

[0038] In this way, the synergistic effect of the two electrode terminals can be used to improve the bending strength of the area in the first shell wall where the electrode terminals are set. Moreover, the first electrode terminal assembly and the second electrode terminal can be arranged as compactly as possible, which is beneficial to the utilization of the non-electrode terminal setting area of the first shell wall, and further beneficial to improving the volume utilization rate of the battery pack. The first gap, the second gap and the third gap all have insulating isolation walls, which can reduce the risk of short circuits between the electrode terminals and help increase the size of the overlapping parts. The insulating isolation walls located in the first gap, the second gap and the third gap are arranged as an integrated part, which helps to reduce the number of parts, speed up assembly and reduce costs.

[0039] In a second aspect, the present application provides a battery device, which includes the battery cell provided in the first aspect.

[0040] This can reduce the risk of short circuits in the battery device.

[0041] In some embodiments, a plurality of the battery cells are arranged with each other; a busbar assembly electrically connects the battery cells adjacent along the arrangement direction of the battery cells, and the busbar assembly includes a first busbar and a second busbar. In the same battery cell, along the wall thickness direction of the first shell wall, the first busbar is arranged on the side of the first electrode terminal away from the first shell wall, and the second busbar is arranged on the side of the second electrode terminal away from the first shell wall. Along the wall thickness direction of the first shell wall and away from the direction of the accommodating space, the insulating member extends beyond the surface of the first electrode terminal and the second electrode terminal away from the first shell wall.

[0042] Therefore, when a plurality of battery cells are connected via a busbar, the risk of short circuit between the busbars can be reduced.

[0043] In some embodiments, along a wall thickness direction of the first housing wall and facing away from the accommodating space, the insulating member extends beyond a surface of the first bus bar and the second bus bar away from the first housing wall.

[0044] Therefore, when a plurality of battery cells are connected via a busbar, the risk of short circuit between the busbars can be further reduced.

[0045] In some embodiments, the insulating member includes an insulating isolation wall, the insulating isolation wall is partially located between the first bus bar and the second bus bar, and the first bus bar and the second bus bar are respectively in contact with the insulating isolation wall.

[0046] The first busbar and the second busbar are insulated by an insulating isolation wall, thereby reducing the risk of short circuit between the busbars.

[0047] In some embodiments, the insulating isolation wall is provided with a first reinforcing rib protruding on the side facing the first bus bar, and a second reinforcing rib protruding on the side facing the second bus bar. A first recess is provided on the first bus bar, and a second recess is provided on the second bus bar. The first recess cooperates with the first reinforcing rib, and the second recess cooperates with the second reinforcing rib.

[0048] When multiple battery cells are connected through the busbar, the busbar can be positioned by the recessed portion and the reinforcing ribs, thereby improving the positioning accuracy of the busbar. The first and second reinforcing ribs can also improve the strength of the insulating isolation wall.

[0049] In some embodiments, the first reinforcing rib and the second reinforcing rib are spaced apart.

[0050] This can further increase the strength of the insulating barrier and further improve the positioning accuracy of the busbar.

[0051] In some embodiments, the battery device includes a box body, each of the battery cells is accommodated in the box body, at least one box wall of the box body has a boss, and the boss forms a accommodating portion on the side facing the battery cell, and the first electrode terminal, the second electrode terminal, the busbar assembly and at least a portion of the insulating member are accommodated in the accommodating portion.

[0052] Thus, only the height of the box body where the first electrode terminal, the second electrode terminal and the busbar are located can be increased, thereby reducing the size of the battery device and improving the volume utilization of the battery device.

[0053] In a third aspect, the present application provides an electrical device, which includes the battery cell provided in the first aspect or the battery device provided in the second aspect, wherein the battery cell or the battery device is used to store or provide electrical energy.

[0054] In this way, the risk of short circuit between the first electrode terminal and the second electrode terminal in the electrical device can be reduced, and the risk of overlap between the busbars on the first electrode terminal and the second electrode terminal can also be reduced.

[0055] In a fourth aspect, the present application provides an energy storage device, which includes the battery cell provided in the first aspect or the battery device provided in the second aspect, wherein the battery cell or the battery device is used to store or provide electrical energy.

[0056] In this way, the short circuit risk between the first electrode terminal and the second electrode terminal in the energy storage device can be reduced, and the risk of overlapping between the busbars on the first electrode terminal and the second electrode terminal can also be reduced.

[0057] The beneficial effects of the embodiments of the present application include: in a battery cell, the insulating member is partially disposed between the first and second electrode terminals, thereby reducing the risk of short circuits between the first and second electrode terminals; even if the first and second electrode terminals are compactly arranged and thus close to each other over a long range, short circuits due to creepage and other factors are less likely to occur. Furthermore, since the first and second electrode terminals can be compactly arranged on the same shell wall of the housing, the volume utilization of the battery is improved. In addition, the insulating member extends beyond the upper surfaces of both the first and second electrode terminals, thereby improving the insulation reliability between the first and second electrode terminals.

[0058] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference numerals are used throughout the drawings to denote the same components. In the drawings:

[0060] Figure 1 A schematic structural diagram of a vehicle provided in one embodiment of the present application;

[0061] Figure 2 A schematic structural diagram of an energy storage device provided in one embodiment of the present application;

[0062] Figure 3 A schematic exploded perspective view of a battery device according to an embodiment of the present application;

[0063] Figure 4 This is a schematic exploded perspective view of a battery cell according to an embodiment of the present application;

[0064] Figure 5 A three-dimensional schematic diagram of the internal structure of a battery device provided in one embodiment of the present application;

[0065] Figure 6 A side view of the internal structure of a battery device provided in one embodiment of the present application;

[0066] Figure 7 Provided for an embodiment of this application Figure 6 AA cross-sectional diagram;

[0067] Figure 8 Provided for an embodiment of this application Figure 7 A local enlarged schematic diagram of area B;

[0068] Figure 9 A top view of a first housing wall provided in one embodiment of the present application;

[0069] Figure 10 Provided for an embodiment of this application Figure 9 A local enlarged schematic diagram of the C region;

[0070] Figure 11 Provided for an embodiment of this application Figure 9 DD cross-sectional diagram;

[0071] Figure 12 Provided for an embodiment of this application Figure 11 A local enlarged schematic diagram of the D1 region;

[0072] Figure 13 Provided for an embodiment of this application Figure 9 EE cross-sectional diagram;

[0073] Figure 14 Provided for an embodiment of this application Figure 13 A local enlarged schematic diagram of the E1 region;

[0074] Figure 15 A schematic perspective view of a first housing wall provided in another embodiment of the present application;

[0075] Figure 16 Provided for an embodiment of this application Figure 15 FF cross-sectional diagram;

[0076] Figure 17 Provided for an embodiment of this application Figure 15 Schematic diagram of the GG cross section;

[0077] Figure 18 A three-dimensional schematic diagram of a first housing wall provided in yet another embodiment of the present application;

[0078] Figure 19 A perspective schematic diagram of a first housing wall provided in yet another embodiment of the present application;

[0079] Figure 20 A schematic exploded perspective view of a first housing wall provided in one embodiment of the present application;

[0080] Figure 21 A schematic cross-sectional view of a battery device with a boss provided in one embodiment of the present application.

[0081] Description of Reference Numerals

[0082] 1000 vehicle; 2000 energy storage device; 100 battery device; 200 controller; 300 motor; 400 master control module; 10 battery cell; 20 housing; 20A first housing; 20B second housing; 1 housing; 11 first housing wall; 12 accommodation space; 13 first electrode terminal; 131 first protrusion; 1311 first main body; 1312 first extension; 13111 first extension; 13121 second step; 14 second electrode terminal; 141 second protrusion; 1411 second main body; 1412 second extension; 14111 second extension; 14121 first step; 15 insulating member; 151 insulating member From the wall; 1511 reinforcing rib; 15111 first reinforcing rib; 15112 second reinforcing rib; 152 insulating bottom wall; 153 insulating side wall; 1531 first side wall portion; 1532 second side wall portion; 154 connecting wall; 155 protruding wall; 16 gap; 161 first gap; 162 second gap; 163 third gap; 2 electrode assembly; 21 first pole ear; 22 second pole ear; 3 bus bar; 31 first bus bar; 311 first end edge; 3111 first recessed portion; 32 second bus bar; 321 second end edge; 3211 second recessed portion; 111a boss; 111b accommodating portion; X wall thickness direction; Y first direction; Z second direction. DETAILED DESCRIPTION

[0083] It should be noted that, unless there is a conflict, the embodiments and technical features in the embodiments of this application can be combined with each other, and the detailed description in the specific implementation method should be understood as an explanation of the purpose of this application and should not be regarded as an improper restriction on this application.

[0084] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions.

[0085] In the description of this application, technical terms such as "first," "second," "third," and "fourth" are used solely to distinguish different objects and should not be understood to indicate or imply relative importance or to implicitly indicate the quantity, specific order, or primary and secondary relationship of the technical features indicated. In the description of this application, "plurality" means more than two, unless otherwise specifically defined.

[0086] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0087] In the description of this application, the term "and / or" is simply a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0088] In the description of the embodiments of the present application, the orientations or positional relationships indicated by technical terms such as "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", and "circumferential" are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, they should not be understood as limitations on the embodiments of the present application.

[0089] In the description of this application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0090] In the description of this application, unless otherwise clearly specified and limited, the technical term "contact" should be understood in a broad sense, and can be direct contact, contact through an intermediate medium layer, contact with essentially no interaction force between the two contacting parties, or contact with interaction force between the two contacting parties.

[0091] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the technical terms "parallel" and "perpendicular" are allowed to have a certain degree of tolerance and / or error, including the situations of being approximately parallel and approximately perpendicular.

[0092] Below, this application is described in detail.

[0093] With the promotion and popularization of the green development concept, new energy batteries are being used more and more widely in life and industry. For example, new energy vehicles equipped with batteries have been widely used. In addition, batteries are also being increasingly used in energy storage fields.

[0094] In existing battery systems, the battery typically includes a casing and electrode terminals disposed on the casing. The electrode terminals may include a positive electrode terminal and a negative electrode terminal. In prior art, the casing of a battery cell is insufficiently strong and prone to bending and deformation. To increase the strength of the battery cell casing, the electrode terminals are compactly arranged. However, compact arrangements of electrode terminals of different polarities are prone to short circuits. Therefore, reducing the risk of short circuits between the positive and negative electrode terminals is one of the research areas in the industry.

[0095] According to research, an insulating member can be added between the positive electrode terminal and the negative electrode terminal, thereby reducing the risk of short circuit between the electrode terminals.

[0096] Based on such a design concept, the inventors of the present application designed a battery cell, which includes: a shell having a accommodating space, the shell including a first shell wall; an electrode assembly, at least partially disposed in the accommodating space, the electrode assembly including a first pole tab and a second pole tab with opposite polarities; a first electrode terminal and a second electrode terminal, respectively disposed on the first shell wall, the first electrode terminal being electrically connected to the first pole tab, and the second electrode terminal being electrically connected to the second pole tab; an insulating member, at least partially disposed between the first electrode terminal and the second electrode terminal; along the wall thickness direction of the first shell wall and away from the accommodating space, the portion of the insulating member located between the first electrode terminal and the second electrode terminal exceeds the upper surfaces of both the first electrode terminal and the second electrode terminal.

[0097] The insulating member is partially disposed between the first electrode terminal and the second electrode terminal, which not only reduces the risk of short circuits between the first electrode terminal and the second electrode terminal, but also increases the length of the overlapping portion of the first electrode terminal and the second electrode terminal when the first electrode terminal and the second electrode terminal are compactly arranged, thereby facilitating improved volume utilization of the battery. Furthermore, the insulating member extends beyond the upper surfaces of both the first electrode terminal and the second electrode terminal, thereby improving the insulation reliability between the first electrode terminal and the second electrode terminal. In the embodiments of the present application, the battery cell may be a secondary battery, which refers to a battery cell that can be recharged to activate the active material after discharge and continue to be used.

[0098] The battery cells can be lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-hydrogen batteries, nickel-cadmium batteries, lead-acid batteries, etc., which are not limited in the embodiments of the present application.

[0099] The technical solutions described in the embodiments of the present application are applicable to various electrical devices that use battery cells or battery devices, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, etc. For example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.

[0100] The technical solutions described in the embodiments of the present application are also applicable to energy storage devices. Energy storage devices can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems or temporary power supply systems, etc. The energy storage device can store electrical energy as needed and output electrical energy at the appropriate time. For example, the energy storage device can store electrical energy during low electricity consumption periods and provide electrical energy to relevant users or electrical equipment during peak electricity consumption periods. The energy storage system provided in the embodiments of the present application can be any power system that requires an energy storage device.

[0101] For the convenience of description, the electric device of one embodiment of the present application is taken as an example of a vehicle 1000. The following description is made with reference to the accompanying drawings.

[0102] Figure 1 This is a schematic diagram of the structure of a vehicle provided in one embodiment of the present application. Vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended range vehicle. Figure 1 As shown, a battery device 100 is installed inside vehicle 1000. Battery device 100 can be installed at the bottom, front, or rear of vehicle 1000. Battery device 100 can be used to power vehicle 1000. For example, battery device 100 can serve as an operating power source for vehicle 1000. Vehicle 1000 can also include a controller 200 and a motor 300. Controller 200 is used to control battery device 100 to power motor 300, for example, to meet the power requirements of vehicle 1000 during startup, navigation, and driving.

[0103] In some embodiments of the present application, the battery device 100 can serve not only as an operating power source for the vehicle 1000 , but also as a driving power source for the vehicle 1000 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000 .

[0104] Figure 2 This is a schematic diagram of the structure of an energy storage device 2000 provided in one embodiment of the present application. Energy storage device 2000 includes one or more battery clusters to increase the voltage and capacity of the energy storage device. A battery cluster may include multiple battery devices connected in series via a busbar to increase the voltage of the energy storage device. When the energy storage device includes multiple battery clusters, the battery clusters are connected in parallel to increase the capacity of the energy storage device.

[0105] In some embodiments, the energy storage device 2000 is an energy storage container or an energy storage cabinet.

[0106] In some embodiments, the energy storage device may include a cabinet and one or more battery clusters housed in the cabinet.

[0107] In some embodiments, the energy storage device may include modules such as a thermal management module, a main control module, a master control module 400 , a power distribution module, and a fire protection module.

[0108] Figure 3 This is a three-dimensional exploded schematic diagram of a battery device provided in one embodiment of the present application. Figure 3 As shown, battery device 100 includes a housing 20, which may include a first housing 20A and a second housing 20B. The first housing 20A and the second housing 20B engage to form an enclosed space within housing 20 for accommodating battery cell assemblies. Enclosed here means covered or closed, and can be either sealed or unsealed. The first housing 20A can be a top cover or a bottom plate.

[0109] As an example, the box may include a top cover, a frame, and a bottom plate, wherein the top cover and the bottom plate are respectively connected to the frame to form a closed space inside the box to accommodate the battery cell assembly.

[0110] As an example, the box body can be used as a part of the chassis structure of the vehicle. For example, the top cover of the box body can become at least a part of the floor of the vehicle, or the frame of the box body can become at least a part of the crossbeam and longitudinal beam of the vehicle.

[0111] The battery apparatus mentioned in the embodiments of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include multiple battery cells, which are connected to each other through a busbar ( Figure 3 (not shown) connected in series, parallel or mixed.

[0112] In some embodiments, a battery cell assembly is generally formed by arranging a plurality of battery cells.

[0113] As an example, the battery cell assembly may be a battery module, which is formed by arranging and fixing multiple battery cells to form an independent module. As an example, the battery module may be formed by bundling multiple battery cells with a cable tie.

[0114] In some embodiments, the battery device may be a battery pack, which includes a case and one or more battery cell assemblies, wherein the battery cell assemblies are housed in the case.

[0115] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box by fixing the battery module in the box.

[0116] As an example, the battery cell assembly may also be housed in the box by directly fixing the plurality of battery cells to the box.

[0117] Next, combine Figures 4 to 21 Some embodiments of the present application are described in detail.

[0118] Figure 4 This is a schematic exploded perspective view of a battery cell 10 provided in one embodiment of the present application; Figure 5 A three-dimensional schematic diagram of the internal structure of a battery device 100 provided in one embodiment of the present application; Figure 6 A side view of the internal structure of a battery device 100 provided in one embodiment of the present application; Figure 7 Provided for an embodiment of this application Figure 6 AA cross-sectional diagram; Figure 8 Provided for an embodiment of this application Figure 7 A local enlarged schematic diagram of area B; Figure 9 A top view of the first housing wall 11 provided in one embodiment of the present application; Figure 10 Provided for an embodiment of this application Figure 9 A local enlarged schematic diagram of the C region; Figure 11 Provided for an embodiment of this application Figure 9 DD cross-sectional diagram; Figure 12 Provided for an embodiment of this application Figure 11 A local enlarged schematic diagram of the D1 region; Figure 13 Provided for an embodiment of this application Figure 9 EE cross-sectional diagram; Figure 14 Provided for an embodiment of this application Figure 13 A local enlarged schematic diagram of the E1 region; Figure 15 A schematic perspective view of a first housing wall 11 provided in another embodiment of the present application; Figure 16 Provided for an embodiment of this application Figure 15 FF cross-sectional diagram; Figure 17 Provided for an embodiment of this application Figure 15 Schematic diagram of the GG cross section; Figure 18 A perspective schematic diagram of a first housing wall 11 provided in yet another embodiment of the present application; Figure 19 A perspective schematic diagram of a first housing wall 11 provided in yet another embodiment of the present application; Figure 20 This is a schematic exploded perspective view of the first housing wall 11 provided in one embodiment of the present application; Figure 21FIG1 is a schematic cross-sectional view of a battery device 100 with a boss according to an embodiment of the present application.

[0119] In the description of the embodiments of the present application, for the convenience of explanation, the direction of the arrow X represents the "wall thickness direction X of the first shell wall 11" and the "height direction of the battery cell 10", the direction of the arrow Y represents the "length direction of the first shell wall 11", the "length direction of the battery cell 10", and the "first direction Y", and the direction of the arrow Z represents the "width direction of the first shell wall 11", the "thickness direction of the battery cell 10", and the "second direction Z".

[0120] In a first aspect, the present application provides a battery cell 10. The battery cell 10 includes: a housing 1 having a housing space 12, the housing 1 including a first housing wall 11; an electrode assembly 2 at least partially disposed in the housing space 12, the electrode assembly 2 including a first electrode tab 21 and a second electrode tab 22 of opposite polarity; a first electrode terminal 13 and a second electrode terminal 14, respectively disposed on the first housing wall 11, the first electrode terminal 13 being electrically connected to the first electrode tab 21, and the second electrode terminal 14 being electrically connected to the second electrode tab 22; an insulating member 15 at least partially disposed between the first electrode terminal 13 and the second electrode terminal 14; and a portion of the insulating member 15 located between the first electrode terminal 13 and the second electrode terminal 14 extending beyond the upper surfaces of both the first electrode terminal 13 and the second electrode terminal 14, along a thickness direction X of the first housing wall 11 and facing away from the housing space 12.

[0121] In the embodiment of the present application, for the convenience of description, the plane on the first electrode terminal 13 used for welding the busbar is referred to as the upper surface of the first electrode terminal 13, and the plane on the second electrode terminal 14 used for welding the busbar is referred to as the upper surface of the second electrode terminal 14.

[0122] like Figure 4 As shown, the battery cell 10 includes a housing 1 having multiple housing walls, one of which is named a first housing wall 11 for ease of description. The battery cell 10 also includes an electrode assembly 2, which is located in a receiving space 12 surrounded by the multiple housing walls.

[0123] In some embodiments, as Figure 4 As shown, the battery cell 10 includes an electrode assembly 2. The electrode assembly 2 includes a positive electrode sheet, a negative electrode sheet, and a separator. During the charge and discharge process of the battery cell 10, active ions (such as lithium ions) are embedded and released back and forth between the positive electrode and the negative electrode. The separator is arranged between the positive electrode sheet and the negative electrode sheet to prevent the positive and negative electrodes from short-circuiting while allowing active ions to pass through. Figure 4In the embodiment shown, as the electrode assembly 2, two stacked winding bodies formed by stacking and winding the positive electrode sheet, the negative electrode sheet and the separator are shown. However, the electrode assembly 2 is not limited to Figure 4 The winding structure shown may also be, for example, a laminated structure or other structural forms.

[0124] The electrode assembly 2 includes a first electrode tab 21 and a second electrode tab 22 with opposite polarities, and the first electrode tab 21 and the second electrode tab 22 can lead current out of the electrode assembly 2. One of the first electrode tab 21 and the second electrode tab 22 can be a positive electrode tab and the other a negative electrode tab. Figure 4 In the specific embodiment shown, the first electrode tab 21 and the second electrode tab 22 are arranged on one side of the electrode assembly 2 along the wall thickness direction X and are both arranged near one end of the electrode assembly 2 along the first direction Y. Of course, the first electrode tab 21 and the second electrode tab 22 can also be arranged at both ends of the electrode assembly 2; the first electrode tab 21 and the second electrode tab 22 can also be arranged near the other end of the electrode assembly 2 along the first direction Y.

[0125] In some embodiments, the battery cell 10 includes a shell 1. The shell 1 can be a steel shell, an aluminum shell, a plastic shell (such as polypropylene), a composite metal shell (such as a copper-aluminum composite shell) or an aluminum-plastic film. In some embodiments, the shell can be a sealed structure or a non-sealed structure. As an example, when the shell is a non-sealed structure, the shell plays a role in protecting the electrode assembly, and a sealing bag is further included between the shell and the electrode assembly, which is used to encapsulate the electrode assembly and the electrolyte. Specifically, the sealing bag can be a bag-shaped insulating member or an aluminum-plastic film. When the shell is a sealed structure, it is used to encapsulate components such as the electrode assembly and the electrolyte.

[0126] As an example, the battery cell 10 may be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell of other shapes. The prismatic battery cell 10 includes a square-shell battery cell, a blade-shaped battery cell, a multi-prismatic battery cell, and the multi-prismatic battery cell is, for example, a hexagonal battery cell. Figures 4 to 21 In the embodiment shown, for ease of explanation, a square-shell battery cell is used as an example. Figure 4 As shown, the housing 1 includes multiple housing walls, some of which enclose a space with an opening. The opening can be closed by another housing wall (e.g., first housing wall 11) to form a receiving space 12 for accommodating the electrode assembly 2 and electrolyte and other substances. The housing 1 can be provided with one or more openings. The housing wall (e.g., first housing wall 11) that closes the opening can also be configured as a top cover.

[0127] like Figures 4 to 20As shown, the battery cell 10 also includes a first electrode terminal 13 and a second electrode terminal 14. The first electrode terminal 13 and the second electrode terminal 14 are arranged on the first shell wall 11. The first electrode terminal 13 is electrically connected to the first electrode tab 21, and the second electrode terminal 14 is electrically connected to the second electrode tab 22 to import or export current in the electrode assembly 2.

[0128] In some embodiments, the electrode terminal may be directly connected to the tab, or indirectly connected to the tab via a current collecting member. For ease of description, in this embodiment of the present application, the housing wall where the electrode terminal is located is referred to as the first housing wall 11 .

[0129] Optionally, there may be two, three or four electrode terminals, including electrode terminals with opposite polarities. When there are two electrode terminals, the polarities of the two electrode terminals may be opposite. One of the two electrode terminals may be a negative electrode and the other a positive electrode. The electrode terminal may be located at the center of the first shell wall 11, or at one end of the first shell wall 11 along the first direction Y, or at one end of the first shell wall 11 along the second direction Z. There is no special restriction on the specific position of the electrode terminal in the first shell wall 11, as long as the electrical connection between the electrode terminal and the tab can be achieved. In a specific embodiment, as Figure 4 As shown, the electrode terminal is located at one end of the first housing wall 11 along the first direction Y.

[0130] Optionally, the electrode terminal may be a cuboid, a triangular prism, an "L" shape, or other irregular shapes, etc. The shapes of the first electrode terminal 13 and the second electrode terminal 14 may be the same or different.

[0131] like Figures 4 to 20 As shown, the battery cell 10 further includes an insulating member 15 , which is at least partially disposed between the first electrode terminal 13 and the second electrode terminal 14 . The insulating member 15 is used to insulate the first electrode terminal 13 and the second electrode terminal 14 from each other.

[0132] In some embodiments, as Figure 4 、 Figure 15 、 Figure 18 and Figure 19 As shown, the first electrode terminal 13 and the second electrode terminal 14 have an overlapping portion in a direction perpendicular to the wall thickness direction X, and a portion of the insulating member 15 may be disposed between the overlapping portions of the first electrode terminal 13 and the second electrode terminal 14. Figure 4Taking the illustrated embodiment as an example, the insulating member 15 may be partially disposed between the overlapping portions of the first electrode terminal 13 and the second electrode terminal 14 along the first direction Y; the insulating member 15 may also be partially disposed between the overlapping portions of the first electrode terminal 13 and the second electrode terminal 14 along the second direction Z; the insulating member 15 may also be partially disposed between both the overlapping portions of the first electrode terminal 13 and the second electrode terminal 14 along the first direction Y and the overlapping portions of the first electrode terminal 13 and the second electrode terminal 14 along the second direction Z.

[0133] In some embodiments, as Figure 9 、 Figure 11 、 Figure 12 、 Figure 13 and Figure 14 As shown, the first electrode terminal 13 and the second electrode terminal 14 have overlapping portions along the wall thickness direction X, and the insulating member 15 may also be disposed between the overlapping portions of the first electrode terminal 13 and the second electrode terminal 14 along the wall thickness direction X.

[0134] Optionally, the insulating member 15 disposed between the first electrode terminal 13 and the second electrode terminal 14 can be directly connected to the first shell wall 11, or a portion of the structure of the insulating member 15 can be located between the electrode terminal and the first shell wall 11, and the portion is connected to the portion of the insulating member 15 located between the first electrode terminal 13 and the second electrode terminal 14, or the insulating member 15 can be an integral part.

[0135] Along the wall thickness direction X of the first housing wall 11, the surface of the portion of the insulating member 15 located between the first electrode terminal 13 and the second electrode terminal 14 facing away from the accommodation space 12 (eg Figure 4 The upper surface shown in FIG. 1 is greater than the upper surface of the first electrode terminal 13 and the second electrode terminal 14 (for example, Figure 4 Further, along the wall thickness direction X of the first housing wall 11, the surface of the portion of the insulating member 15 located between the first electrode terminal 13 and the second electrode terminal 14 facing away from the accommodation space 12 (eg Figure 5 The upper surface shown in FIG. 1 is larger than the surface of the current collecting member 3 facing away from the receiving space 12 (eg Figure 5 upper surface shown).

[0136] In some embodiments, along the wall thickness direction X, the surface of the insulating member 15 facing away from the accommodating space 12 (eg Figure 5 The upper surface shown in FIG) and the upper surface of the first electrode terminal 13 or the second electrode terminal 14 (eg Figure 4 Optionally, along the wall thickness direction X, the surface of the insulating member 15 facing away from the accommodating space 12 (eg Figure 5The upper surface shown in FIG) and the upper surface of the first electrode terminal 13 or the second electrode terminal 14 (eg Figure 4 The distance (in the orientation shown) can be 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 8.5mm, 9mm, 9.5mm or 10mm, etc., and of course it can also be other values within the above range.

[0137] Because the insulating member 15 is partially positioned between the first and second electrode terminals 13 and 14, the risk of short circuits between the first and second electrode terminals 13 and 14 is reduced. Even if the first and second electrode terminals are compactly arranged and close to each other over a long distance, short circuits due to creepage and other factors are less likely to occur. Furthermore, since the first and second electrode terminals can be compactly arranged within the same housing wall, the volume utilization of the battery is improved. Furthermore, the insulating member extends beyond the upper surfaces of both the first and second electrode terminals, improving the insulation reliability between the first and second electrode terminals.

[0138] In some embodiments, as Figures 4 to 20 As shown, the first electrode terminal 13 has a first protrusion 131 protruding from the outer surface of the first shell wall 11, and the second electrode terminal 14 has a second protrusion 141 protruding from the outer surface of the first shell wall 11, and a gap 16 is formed between the first protrusion 131 and the second protrusion 141; the insulating member 15 includes an insulating isolation wall 151, which is arranged in the gap 16 to isolate the first protrusion 131 and the second protrusion 141, so that the first protrusion 131 and the second protrusion 141 are insulated from each other, and the insulating isolation wall 151 extends beyond the first protrusion 131 and the second protrusion 141 along the wall thickness direction X of the first shell wall 11 and away from the accommodating space 12.

[0139] The first protrusion 131 refers to the portion of the first electrode terminal 13 that extends beyond the first housing wall 11 and is located outside the housing 1 along the wall thickness direction X of the first housing wall 11, and the second protrusion 141 refers to the portion of the second electrode terminal 14 that extends beyond the first housing wall 11 and is located outside the housing 1 along the wall thickness direction X of the first housing wall 11. When viewed along the wall thickness direction X of the first housing wall 11, the shape of the gap 16 formed by the first protrusion 131 and the second protrusion 141 can be a straight line (e.g., Figure 15 or Figure 18 shown), "L" type (e.g. Figure 19 shown), "Z" type (e.g. Figure 4 As shown), curved or other shapes, the insulating isolation wall 151 is provided in the gap 16.

[0140] Optionally, the first protrusion 131 may be a rectangular parallelepiped, a triangular prism, an L-shape, or other irregular shapes. The second protrusion 141 may be a rectangular parallelepiped, a triangular prism, an L-shape, or other irregular shapes. The shapes of the first protrusion 131 and the second protrusion 141 may be the same or different.

[0141] Optionally, when observed along the wall thickness direction X of the first shell wall, when the extension direction of the insulating isolation wall 151 is the same as that of the gap 16, the extension length of the insulating isolation wall 151 along the same extension direction may be longer than the extension length of the gap 16 along the same extension direction, or shorter than the extension length of the gap 16 along the same extension direction, or may be substantially the same as the extension length of the gap 16 along the same extension direction.

[0142] Along the wall thickness direction X of the first housing wall 11, the surface of the insulating isolation wall 151 facing away from the accommodating space 12 (eg Figure 4 The upper surface shown in FIG. 1 is greater than the upper surface of the first protrusion 131 and the second protrusion 141 (for example, Figure 4 Further, along the wall thickness direction X of the first shell wall 11, the surface of the insulating isolation wall 151 facing away from the accommodating space 12 (eg Figure 5 The upper surface shown in FIG. 1 is larger than the surface of the current collecting member 3 facing away from the receiving space 12 (eg Figure 5 upper surface shown).

[0143] Insulating wall 151 is disposed between gap 16 formed by first protrusion 131 and second protrusion 141. This not only reduces the risk of short circuits between the first and second electrode terminals, but also allows for a compact arrangement of the first and second electrode terminals. Even if the first and second electrode terminals are positioned close to each other over a long distance, the insulating wall of a corresponding length can easily isolate the two electrode terminals, reducing the risk of accidental short circuits. Furthermore, the insulating member has a simple structure and is easily assembled with the electrode terminals.

[0144] In some embodiments, as Figure 16 As shown, the insulating member 15 includes an insulating bottom wall 152 and an insulating isolation wall 151 : the insulating bottom wall 152 is provided between at least one of the first protrusion 131 and the second protrusion 141 and the first housing wall 11 , and the insulating isolation wall 151 is connected to the insulating bottom wall 152 .

[0145] The insulating bottom wall 152 is provided between at least one of the first protrusion 131 and the second protrusion 141 and the first housing wall 11 to insulate at least one of the first protrusion 131 and the second protrusion 141 from the first housing wall 11 .

[0146] Optionally, the insulating bottom wall 152 can be located between the first protrusion 131 and the first shell wall 11, so that the first protrusion 131 and the first shell wall 11 are insulated from each other, and the isolation insulating member 15 may not be provided between the second protrusion 141 and the first shell wall 11. In this case, the second protrusion 141 has the same electrical properties as the shell 1, and can be positively charged or negatively charged. An insulating member may also be provided between the second protrusion 141 and the first shell wall 11; the insulating bottom wall 152 may also be located both between the first protrusion 131 and the first shell wall 11 and between the second protrusion 141 and the first shell wall 11, and the insulating bottom wall 152 insulates the first protrusion 131 and the second protrusion 141 from the first shell wall 11; the insulating bottom wall 152 may also be located only between the second protrusion 141 and the first shell wall 11, which will not be described in detail here.

[0147] During the battery cell assembly process, the electrode assembly and the insulating member can be assembled separately or integrally.

[0148] The insulating bottom wall 152 is disposed between at least one of the first protrusion 131 and the second protrusion 141 and the first housing wall 11, thereby insulating at least one of the first protrusion 131 and the second protrusion 141 from the first housing wall 11. The insulating isolation wall 151 is connected to the insulating bottom wall 152, thereby being achieved by a single insulating member 15. This allows for both insulation of the first protrusion 131 or the second protrusion 141 from the housing wall and insulation of the first protrusion 131 and the second protrusion 141 from each other, thereby reducing the number of parts, improving assembly efficiency, and lowering production costs.

[0149] In some embodiments, as Figure 20 As shown, the insulating bottom wall 152 is provided between the first protrusion 131 and the second protrusion 141 and the first housing wall 11, and the insulating bottom wall 152 and the insulating isolation wall 151 are formed as a single piece. The insulating bottom wall 152 insulates the first protrusion 131 and the second protrusion 141 from the first housing wall 11.

[0150] Along the wall thickness direction X, a portion of the insulating bottom wall 152 is located between the first protrusion 131 and the first housing wall 11 , and another portion of the insulating bottom wall 152 is located between the second protrusion 141 and the first housing wall 11 .

[0151] The insulating bottom wall 152 is disposed between the first protrusion 131 and the second protrusion 141 and the first housing wall 11, thereby insulating the first protrusion 131 and the second protrusion 141 from the first housing wall 11. The insulating bottom wall 152 and the insulating isolation wall 151 are formed as an integral piece, which reduces the number of parts and improves assembly efficiency.

[0152] In some embodiments, as Figure 8or Figure 17 As shown, the insulating member 15 further includes an insulating sidewall 153, which is connected to the insulating bottom wall 152 and extends along the wall thickness direction X of the first housing wall 11. The insulating sidewall 153 is disposed around at least one of the first protrusion 131 and the second protrusion 141. Along the wall thickness direction X of the first housing wall 11, the insulating isolation wall 151 is disposed farther away from the first housing wall 11 than the insulating sidewall 153. The insulating sidewall 153 is used to insulate a portion of the first protrusion 131 or a portion of the second protrusion 141 from external structures.

[0153] Alternatively, the insulating sidewall 153 may be provided only around the first protrusion 131, and the insulating isolation wall 151 may be provided at a position farther away from the first shell wall 11 than the insulating sidewall 153 along the wall thickness direction X of the first shell wall 11; the insulating sidewall 153 may also be provided only around the second protrusion 141, and the insulating isolation wall 151 may be provided at a position farther away from the first shell wall 11 than the insulating sidewall 153 along the wall thickness direction X of the first shell wall 11. The insulating sidewall 153 may also be provided around the first protrusion 131 and the second protrusion 141. Figure 17 As shown, there may be only one insulating side wall 153 between the first protrusion 131 and the second protrusion 141, and the insulating isolation wall 151 is arranged at a position farther away from the first shell wall 11 than the insulating side wall 153; Figure 8 As shown, an insulating sidewall 153 is disposed around each of the first protrusion 131 and the second protrusion 141, and an insulating isolation wall 151 is disposed on one of the insulating sidewalls 153 and further away from the first housing wall 11 than the insulating sidewall 153. Here, "encircling" includes completely surrounding or partially surrounding, with partially surrounding meaning disposed along a portion of the outer circumference of the first protrusion 131 or the second protrusion 141. The insulating isolation wall 151 can be disposed on each of the insulating sidewalls 153, i.e., two insulating isolation walls 151 are provided; alternatively, the two insulating sidewalls 153 can share a single insulating isolation wall 151.

[0154] Optionally, along the wall thickness direction X of the first housing wall 11, the surface of the insulating side wall 153 facing away from the accommodating space 12 (eg Figure 8 The upper surface of the first side wall portion 1531 or the upper surface of the second side wall portion 1532 shown in FIG. 1 is lower than the surface of the first electrode terminal 13 or the second electrode terminal 14 on the side facing away from the accommodation space 12 (eg, Figure 8 The upper surface of the first electrode terminal 13 or the second electrode terminal 14 shown in FIG), or the surface of the insulating side wall 153 facing away from the accommodating space 12 along the wall thickness direction X of the first housing wall 11 (eg Figure 8The upper surface of the first side wall portion 1531 or the upper surface of the second side wall portion 1532 shown in FIG. 1 is connected to the surface of the first electrode terminal 13 or the second electrode terminal 14 facing away from the receiving space 12 (eg, Figure 8 The upper surface of the first electrode terminal 13 or the second electrode terminal 14 shown is substantially flush.

[0155] The insulating sidewall 153 is disposed around at least one of the first protrusion 131 and the second protrusion 141. This not only circumferentially insulates the first protrusion 131 and / or the second protrusion 141, reducing the likelihood of electrical conduction between the first protrusion 131 and / or the second protrusion 141 and other components, but also strengthens the first protrusion 131 and / or the second protrusion 141 in a direction perpendicular to the wall thickness direction X of the first housing wall 11 (e.g., along the wall surface of the first housing wall), reducing the likelihood of displacement or deformation of the first protrusion 131 and / or the second protrusion 141 due to external forces. The insulating isolation wall is disposed farther from the first housing wall than the insulating sidewall, thereby providing insulation between the first and second electrode terminals together with the insulating sidewall. Furthermore, since the insulating isolation wall does not need to be disposed from the insulating bottom wall, it saves space and simplifies the overall structure of the insulating component.

[0156] In some embodiments, as Figure 7 and Figure 8 As shown, the insulating sidewall 153 includes a first sidewall portion 1531 and a second sidewall portion 1532 located in the gap 16. The first sidewall portion 1531 (eg Figure 8 The right side wall of the gap 16 shown in FIG. 1 is provided close to the first protrusion 131 , and the second side wall portion 1532 (eg Figure 8 The left side wall in the gap 16 shown is arranged close to the second protrusion 141, and the insulating member 15 also includes a connecting wall 154, which is mounted on the first side wall portion 1531 and the second side wall portion 1532. The insulating isolation wall 151 is arranged on the connecting wall 154 and extends from the connecting wall 154 along the wall thickness direction X of the first shell wall 11 in a direction away from the first shell wall 11.

[0157] Optionally, along the wall thickness direction X of the first housing wall 11, the surface of the connecting wall 154 on the side facing away from the accommodating space 12 (eg Figure 8 The upper surface of the connecting wall 154 shown in FIG. 1 is lower than the surface of the first electrode terminal 13 or the second electrode terminal 14 on the side facing away from the accommodation space 12 (eg, Figure 8 The upper surface of the first electrode terminal 13 or the second electrode terminal 14 shown in FIG), or the surface of the connecting wall 154 facing away from the accommodating space 12 along the wall thickness direction X of the first housing wall 11 (eg Figure 8The upper surface of the connecting wall 154 shown in FIG. 1 is connected to the surface of the first electrode terminal 13 or the second electrode terminal 14 on the side away from the accommodation space 12 (eg Figure 8 The upper surface of the first electrode terminal 13 or the second electrode terminal 14 shown is substantially flush.

[0158] The first sidewall portion 1531 is positioned near the first protrusion 131, and the second sidewall portion 1532 is positioned near the second protrusion 141. This increases the creepage distance between the first and second electrode terminals 13 and 14, improving insulation reliability. The provision of insulating sidewalls 153 on each of the first and second protrusions 131 and 141 not only circumferentially insulates the first and second protrusions 131 and 141, reducing the likelihood of electrical conduction between them and other components, but also strengthens the first and second protrusions 131 and 141 in a direction perpendicular to the thickness direction X of the first housing wall 11, reducing the likelihood of deformation due to external forces. Furthermore, because the insulating isolation wall is positioned within the connecting wall and extends from the connecting wall along the thickness direction of the first housing wall away from the first housing wall, it saves space and simplifies the overall structure of the insulating component.

[0159] In some embodiments, as Figure 12 、 Figure 14 or Figure 17 As shown, the insulating member 15 further includes a protruding wall 155, which is connected to the end of the insulating side wall 153 away from the insulating bottom wall 152 along the wall thickness direction X (for example Figure 12 、 Figure 14 or Figure 17 As shown in the upper end portion, along the wall thickness direction X of the first shell wall 11, at least one of the first protrusion 131 and the second protrusion 141 has an overlapping portion with the projection of the extended wall 155 in the same projection plane.

[0160] Optionally, along the wall thickness direction X of the first shell wall 11, only the projections of the first protrusion 131 and the protruding wall 155 in the same projection plane may have an overlapping portion; along the wall thickness direction X of the first shell wall 11, only the projections of the second protrusion 141 and the protruding wall 155 in the same projection plane may have an overlapping portion; along the wall thickness direction X of the first shell wall 11, as shown Figure 12 、 Figure 14 or Figure 17 As shown, the projections of the first protrusion 131 and the second protrusion 141 and the extending wall 155 in the same projection plane may also have overlapping portions.

[0161] Optional, such as Figure 17As shown, along the wall thickness direction X of the first housing wall 11, the surface of the side of the protruding wall 155 facing away from the accommodating space 12 (eg Figure 8 or Figure 17 The upper surface of the protruding wall 155 shown in FIG. 1 is connected to the surface of the first protrusion 131 or the second protrusion 141 facing away from the receiving space 12 (eg, Figure 8 or Figure 17 The upper surface of the first protrusion 131 or the second protrusion 141 shown is generally flush; Figure 12 、 Figure 14 As shown, along the wall thickness direction X of the first housing wall 11, the surface of the side of the protruding wall 155 facing away from the accommodating space 12 (eg Figure 8 or Figure 17 The upper surface of the protruding wall 155 shown is lower than the surface of the first protrusion 131 or the second protrusion 141 facing away from the accommodating space 12 (eg Figure 8 or Figure 17 The upper surface of the first protrusion 131 or the second protrusion 141 shown).

[0162] During the battery cell assembly process, the electrode terminals may be integrally formed with the insulating member 15 .

[0163] The integral structure formed by the protruding wall 155 and the insulating side wall 153 can limit the displacement or bending deformation of the first protrusion 131 and / or the second protrusion 141 along the wall thickness direction of the first shell wall; when the first protrusion 131 and the second protrusion 141 both have overlapping parts with the protruding wall 155 along the wall thickness direction X of the first shell wall 11, when one electrode terminal is pulled or squeezed, the insulating member 15 can transfer the energy acting on this electrode terminal to the other electrode terminal, further enhancing the deformation resistance of the electrode terminal.

[0164] In some embodiments, as Figure 12 or Figure 14 As shown, the insulating isolation wall 151 is provided on the protruding wall 155 and extends in a direction away from the first housing wall 11 .

[0165] In some embodiments, as Figure 12 or Figure 14 As shown, the insulating isolation wall 151 is provided on the protruding wall 155 and extends from the protruding wall 155 along the wall thickness direction X of the first housing wall 11 toward a direction away from the first housing wall 11 .

[0166] Thus, not only can the short circuit risk of the first protrusion 131 and the second protrusion 141 be reduced, but also when the first electrode terminal 13 and the second electrode terminal 14 are compactly arranged, due to the above arrangement, the length of the overlapping part of the first electrode terminal 13 and the second electrode terminal 14 can be increased, and the risk of overlap between the busbars 3 on the first electrode terminal 13 and the second electrode terminal 14 can be reduced.

[0167] In some embodiments, as Figure 5 and Figure 20 As shown, the insulating isolation wall 151 has at least one reinforcing rib, and the reinforcing rib extends along the wall thickness direction X of the first housing wall 11 .

[0168] Optionally, a stiffening rib extending along the wall thickness direction X of the first shell wall 11 may be provided on a surface of the insulating isolation wall 151 perpendicular to the second direction Z, or the insulating isolation wall 151 may be partially raised along the second direction Z.

[0169] Optionally, there may be one, two, three or more reinforcing ribs. When there are multiple reinforcing ribs, the multiple reinforcing ribs may be located on the same surface of the insulating isolation wall 151 perpendicular to the second direction Z, or on different surfaces of the insulating isolation wall 151 perpendicular to the second direction Z.

[0170] Optionally, along the wall thickness direction X of the first shell wall 11, the reinforcing ribs may extend beyond the insulating isolation wall 151, or may be located within the insulating isolation wall 151. In a specific embodiment, the reinforcing ribs are formed along the entire length of the insulating isolation wall 151 along the wall thickness direction X.

[0171] The insulating isolation wall 151 is provided with at least one reinforcing rib, which can increase the strength of the insulating isolation wall 151 and reduce the risk of the insulating isolation wall 151 being deformed by external force.

[0172] In some embodiments, as Figure 5 and Figure 20 As shown, along the wall thickness direction X of the first housing wall 11 and facing away from the accommodating space 12, the insulating isolation wall 151 extends beyond both the first protrusion 131 and the second protrusion 141, and at least this extending portion has at least one reinforcing rib 1511. Of course, in the direction perpendicular to the wall thickness direction X of the first housing wall 11, the overlapping portion of the insulating isolation wall 151 and the first protrusion 131 or the second protrusion 141 may also have a reinforcing rib.

[0173] Optionally, the protruding portion may have one, two, three or more reinforcing ribs 1511. The plurality of reinforcing ribs 1511 may be arranged along the first direction Y. Further, the plurality of reinforcing ribs 1511 may be arranged along the first direction Y at intervals.

[0174] When the protruding portion has at least one reinforcing rib 1511 , when different battery cells 10 are connected via the busbar 3 , the busbar 3 can be connected and positioned with the electrode terminals via the reinforcing rib, thereby improving the positioning accuracy of the busbar 3 .

[0175] In some embodiments, as Figure 20 As shown, the reinforcing rib 1511 is formed along the entire length of the insulating isolation wall 151 along the wall thickness direction X.

[0176] In this way, not only can the strength of the insulating isolation wall 151 be further increased, thereby further reducing the risk of the insulating isolation wall 151 being crushed by external force, but also when different battery cells 10 are connected through the busbar 3, the busbar 3 can also be connected and positioned with the electrode terminals through reinforcing ribs, thereby improving the positioning accuracy of the busbar 3.

[0177] In some embodiments, as Figure 5 and Figure 20 As shown, the reinforcing rib 1511 is protruded from the surface of the insulating isolation wall 151 facing the first electrode terminal 13 and / or the second electrode terminal 14 .

[0178] Optionally, the reinforcing rib 1511 can be protruded from the surface of the insulating isolation wall 151 facing the first electrode terminal 13; the reinforcing rib 1511 can also be protruded from the surface of the insulating isolation wall 151 facing the second electrode terminal 14; the reinforcing rib 1511 can also be protruded from both the surface of the insulating isolation wall 151 facing the first electrode terminal 13 and the surface of the insulating isolation wall 151 facing the second electrode terminal 14.

[0179] In some embodiments, as Figure 5 and Figure 20 As shown, the reinforcement rib is formed by a raised portion formed on the insulating isolation wall 151 .

[0180] The insulating isolation wall 151 may be raised along one side or the other side of the second direction Z to form a reinforcing rib. When there are multiple reinforcing ribs, the directions of the multiple raised portions may be the same or opposite. In a specific embodiment, there are two reinforcing ribs, and the two reinforcing ribs are raised in opposite directions.

[0181] Therefore, the insulating isolation wall 151 can not only insulate the first electrode terminal 13 and the second electrode terminal 14 from each other, reducing the risk of overlap of the busbar 3, but also the arrangement of the reinforcing rib protruding from the insulating isolation wall can increase the strength of the insulating isolation wall 151, improve the positioning accuracy of the busbar 3, and reduce the number of components and reduce costs.

[0182] In some embodiments, as Figure 9 and Figure 10As shown, the first protrusion 131 includes a first main body portion 1311 and a first extension portion 1312 connected to each other, the second protrusion 141 includes a second main body portion 1411 and a second extension portion 1412 connected to each other, the gap 16 includes a first gap 161 formed between the first extension portion 1312 and the second extension portion 1412, and an insulating isolation wall 151 is provided at least in the first gap 161.

[0183] exist Figure 9 In the specific example shown, the first main portion 1311 and the second main portion 1411 are formed into a generally rectangular shape, with their long sides extending along the second direction Z. The first and second main portions 1311, 1411 are aligned along the first direction Y. The first and second extension portions 1312, 1412 are both formed into a generally rectangular shape, with their long sides extending along the first direction Y. The first and second extension portions 1312, 1412 are aligned along the second direction. The first and second main portions 1311, 1411 are arranged relatively close together along the first direction. That is, the first and second extension portions 1311, 1412 are relatively close to each other, while the second and first extension portions 1312 are relatively close to each other. However, the first and second extension portions 1311, 1412 can also be spaced farther apart, while the second and first extension portions 1411, 1412 are spaced farther apart. Consequently, a first gap 161 is formed between the first and second extension portions 1312, 1412.

[0184] certainly, Figure 6 The figure is only a specific embodiment. The shapes and arrangement positions of the first main body 1311, the first extension 1312, the second main body 1411 and the second extension 1412 are not limited to Figure 9 The embodiment shown.

[0185] Furthermore, in Figure 6 In the illustrated embodiment, along the second direction Z, the outer edges of the second main portion 1411 and the first extension portion 1312 (edges proximal to the long sides of the first housing wall) are generally flush, and the outer edges of the first main portion 1311 and the second extension portion 1412 (edges proximal to the long sides of the first housing wall) are generally flush. However, these may not be flush. Alternatively, one of the outer edges of the second main portion 1411 and the first extension portion 1312 may be closer to the long sides of the first housing wall 11, and / or one of the outer edges of the first main portion 1311 and the second extension portion 1412 may be closer to the long sides of the first housing wall 11.

[0186] The protrusion, comprising a main body and an extension, increases the contact area between the terminal plate and air, thereby increasing the contact area between the electrode terminal and air. This increases the heat dissipation area, improves the heat dissipation performance of the electrode terminal, and further enhances the performance of the battery cell 10. The provision of the insulating barrier 151 within at least the first slit 161 reduces the risk of short circuiting between the first extension 1312 and the second extension 1412, and increases the length of the overlapping portion between the first extension 1312 and the second extension 1412.

[0187] In some embodiments, as Figure 9 and Figure 10 As shown, a second gap 162 is further formed between the first main portion 1311 and the second extension portion 1412 , and an insulating isolation wall 151 is provided in the first gap 161 and the second gap 162 .

[0188] The risk of short circuit between the first main body portion 1311 and the second extending portion 1412 can be reduced, and the length of the overlapping portion between the first main body portion 1311 and the second extending portion 1412 can be increased.

[0189] In some embodiments, as Figure 11 and Figure 12 As shown, the first main body portion 1311 has a first extension portion 13111 extending along the first direction Y, and the second extension portion 1412 has a first step portion 14121 formed by being partially recessed along the wall thickness direction X; along the wall thickness direction X, the first extension portion 13111 covers a portion of the first step portion 14121 from the side away from the first shell wall 11; and, along the first direction Y, there is a first gap between the first extension portion 13111 and the first step surface of the first step portion 14121 that is perpendicular to the first direction Y, wherein the first direction Y is perpendicular to the wall thickness direction X and is consistent with the extension direction of the first extension portion 1312 and the second extension portion 1412; the first gap constitutes at least a part of the second gap 162. That is, an insulating isolation wall 151 is also provided at the first gap. The first step surface refers to the surface of the first step portion 14121 that is perpendicular to the wall thickness direction X and away from the accommodating space 12 along the wall thickness direction X (for example Figure 12 upper surface shown).

[0190] exist Figure 11 or Figure 12 In the illustrated embodiment, the first step portion 14121 is a single step, but the first step may also have two or three steps. When the first step is a multi-step step, the first extension portion 13111 may cover the step or steps closest to the first extension portion 13111 in the first step portion 14121 from the side facing away from the accommodating space 12.

[0191] Thus, the cooperation between the first extension 13111 and the first step 14121 can limit the bending deformation of the second electrode terminal 14. The first extension 13111 covers a portion of the first step 14121, which not only reduces the space occupied by the first extension 13111 and improves space utilization, but also provides the insulating barrier 151 at the first gap, which increases the creepage distance between the first electrode terminal 13 and the second electrode terminal 14, thereby improving insulation reliability.

[0192] In some embodiments, as Figure 9 and Figure 10 As shown, a third gap 163 is further formed between the second main portion 1411 and the first extension portion 1312 , and insulating isolation walls 151 are provided in the first gap 161 , the second gap 162 , and the third gap 163 .

[0193] An insulating isolation wall 151 is arranged at the gap 16 between the first protrusion 131 and the second protrusion 141 to reduce the risk of short circuit between the electrode terminals and to increase the size of the overlapping portion of the first protrusion 131 and the second protrusion 141 .

[0194] In some embodiments, as Figure 13 and Figure 14 As shown, the second main body portion 1411 has a second protruding portion 14111 extending along the first direction Y, and the first extension portion 1312 has a second step portion 13121 formed by being partially recessed along the wall thickness direction X; along the wall thickness direction X, the second protruding portion 14111 covers a portion of the second step portion 13121 from the side away from the first shell wall 11; and, along the first direction Y, there is a second gap between the second protruding portion 14111 and the second step surface of the second step portion 13121 that is perpendicular to the first direction Y, and the second gap constitutes at least a part of the third gap 163. That is, an insulating isolation wall 151 is also provided at the second gap. The second step surface refers to the surface of the second step portion 13121 that is perpendicular to the wall thickness direction X and away from the accommodating space 12 along the wall thickness direction X (for example Figure 12 upper surface shown).

[0195] exist Figure 13 or Figure 14 In the illustrated embodiment, the second step portion 13121 is a single step. Of course, the second step portion 13121 may also have two or three steps. When the second step portion has multiple steps, the second extension portion 14111 may cover the step or steps closest to the second extension portion 14111 in the second step portion 13121 from the side facing away from the first housing wall 11.

[0196] Thus, the cooperation between the second extension 14111 and the second step 13121 can limit the bending deformation of the first electrode terminal 13. Furthermore, the second extension 14111 covers a portion of the second step 13121, which not only reduces the space occupied by the second extension 14111 and improves space utilization, but also provides an insulating barrier 151 at the second gap, which increases the creepage distance between the first electrode terminal 13 and the second electrode terminal 14, thereby improving insulation reliability.

[0197] In some embodiments, as Figure 9 、 Figure 10 or Figure 20 As shown, the first gap 161 extends along the first direction Y, the second gap 162 and the third gap 163 extend along the second direction Z, the first direction Y and the second direction Z are perpendicular to each other and are both perpendicular to the wall thickness direction X, and the insulating isolation wall 151 is located in the first gap 161, the second gap 162 and the third gap 163 and constitutes an integral part.

[0198] That is, along the second direction Z, the first extension portion 1312 and the second extension portion 1412 have an overlapping portion, thereby forming a first gap 161 extending along the first direction Y between the first extension portion 1312 and the second extension portion 1412; along the first direction Y, the first main body portion 1311 and the second extension portion 1412 have an overlapping portion, thereby forming a second gap 162 extending along the second direction Z between the first main body portion 1311 and the second extension portion 1412; along the first direction Y, the second main body portion 1411 and the first extension portion 1312 have an overlapping portion, thereby forming a third gap 163 extending along the second direction Z between the second main body portion 1411 and the first extension portion 1312.

[0199] The first slit 161, the second slit 162, and the third slit 163 are interconnected, so the insulating isolation walls 151 located in the first slit 161, the second slit 162, and the third slit 163 can be formed as a single piece. Of course, the insulating isolation walls 151 located in the first slit 161, the second slit 162, and the third slit 163 can also be formed as separate pieces, for example, different insulating isolation walls 151 can be provided in the first slit 161, the second slit 162, and the third slit 163, respectively.

[0200] In this way, the synergistic effect of the two electrode terminals can be utilized to improve the bending strength of the area where the electrode terminals are set in the first shell wall 11. Moreover, the first electrode terminal 13 assembly and the second electrode terminal 14 can be arranged as compactly as possible, which is beneficial to the utilization of the non-electrode terminal setting area of the first shell wall 11, and further beneficial to improving the volume utilization rate of the battery pack. The first gap 161, the second gap 162 and the third gap 163 all have an insulating isolation wall 151, which can reduce the risk of short circuit between the electrode terminals and is beneficial to increase the size of the overlapping part. The insulating isolation wall 151 located in the first gap 161, the second gap 162 and the third gap 163 is configured as an integrated part, which is beneficial to reduce the number of parts, speed up assembly speed and reduce costs. The second aspect of the present application provides a battery device 100. The battery device 100 includes the battery cell 10 provided by the first aspect.

[0201] This can reduce the risk of short circuit in the battery device 100 .

[0202] In some embodiments, multiple battery cells 10 are arranged with each other; the battery device 100 also includes a busbar assembly, which electrically connects the battery cells 10 adjacent along the arrangement direction of the battery cells 10, and the busbar assembly includes a first busbar 31 and a second busbar 32. In the same battery cell 10, along the wall thickness direction X of the first shell wall 11, the first busbar 31 is arranged on the side of the first electrode terminal 13 away from the first shell wall 11, and the second busbar 32 is arranged on the side of the second electrode terminal 14 away from the first shell wall 11. Along the wall thickness direction X of the first shell wall 11 and away from the accommodating space 12, the insulating member 15 exceeds the surface of the first electrode terminal 13 and the second electrode terminal 14 away from the first shell wall 11.

[0203] In some embodiments, the same busbar 3 is used to connect the first electrode terminals 13 and the second electrode terminals 14 between adjacent battery cells 10 , thereby achieving electrical connection between the battery cells 10 .

[0204] exist Figure 5 In the specific embodiment shown, the current collector 3 is configured as a rectangular thin plate, but is not limited to a rectangle and may be other suitable shapes. In addition, it is not limited to a plate shape and may be other suitable three-dimensional shapes.

[0205] exist Figure 5In the illustrated embodiment, the busbar 3 is laminated on the extensions of the electrode terminals. For example, in the same battery cell 10, along the thickness direction X of the first housing wall 11, the first busbar 31 is laminated on the first extension 1312 of the first electrode terminal 13, and the second busbar 32 is laminated on the second extension 1412 of the second electrode terminal 14. However, along the thickness direction X of the first housing wall 11, the busbar 3 is not limited to being laminated only on the extensions; the busbar 3 may also be laminated on the main body.

[0206] Along the wall thickness direction X of the first housing wall 11 and away from the accommodating space 12, the insulating member 15 exceeds the upper surface of the first electrode terminal 13 (for example Figure 5 As shown in the direction) and part of the first busbar 31, that is, along the wall thickness direction X of the first housing wall 11, the surface of the insulating member 15 farthest from the accommodation space 12 (eg Figure 8 The upper surface of the insulating isolation portion shown in FIG. 1 may be located on the upper surface of the first electrode terminal 13 (eg, Figure 8 shown in the direction) and the surface of the first current collector 31 that is farthest from the accommodation space 12 (eg Figure 8 Further, along the wall thickness direction X of the first housing wall 11, the surface of the insulating member 15 farthest from the accommodation space 12 (eg Figure 8 The upper surface of the insulating isolation portion shown in FIG. 1 is larger than the surface of the first current bus 31 that is farthest from the accommodation space 12 (eg Figure 8 The upper surface of the first busbar 31 shown in FIG. 1 is further away from the accommodating space 12 .

[0207] The insulating member 15 also extends beyond the upper surface of the two electrode terminals (eg Figure 5 As shown in the orientation) and part of the second busbar 32, that is, along the wall thickness direction X of the first housing wall 11, the surface of the insulating member 15 farthest from the accommodating space 12 (eg Figure 8 The upper surface of the insulating isolation portion shown in FIG. 1 may be located on the upper surface of the second electrode terminal 14 (eg, Figure 8 shown in the direction) and the surface of the second busbar 32 that is farthest from the receiving space 12 (eg Figure 8 Further, along the wall thickness direction X of the first housing wall 11, the surface of the insulating member 15 farthest from the accommodation space 12 (eg Figure 8 The upper surface of the insulating isolation portion shown in FIG. 1 is larger than the surface of the second busbar 32 that is farthest from the receiving space 12 (eg Figure 8 The upper surface of the second busbar 32 is shown further away from the accommodating space 12 .

[0208] Therefore, when different battery cells 10 are connected via the busbars 3 , the risk of short circuit between the busbars 3 can be reduced.

[0209] In some embodiments, along the wall thickness direction X of the first housing wall 11 and facing away from the accommodation space 12, the insulating member 15 extends beyond the surface of the first busbar 31 and the second busbar 32 away from the first housing wall 11. That is, along the wall thickness direction X of the first housing wall 11, the insulating member 15 is farthest from the surface of the accommodation space 12 (for example, Figure 8 The upper surface of the insulating isolation portion shown in FIG. 1 is larger than the surface of the first current bus 31 that is farthest from the accommodation space 12 (eg Figure 8 The upper surface of the first current collecting member 31 shown in FIG. 1 is further away from the receiving space 12 , and the surface of the insulating member 15 farthest from the receiving space 12 (eg Figure 8 The upper surface of the insulating isolation portion shown in FIG. 1 is larger than the surface of the second busbar 32 that is farthest from the receiving space 12 (eg Figure 8 The upper surface of the second busbar 32 is shown further away from the accommodating space 12 .

[0210] Therefore, when different battery cells 10 are connected via the busbars 3 , the risk of short circuit between the busbars 3 can be further reduced.

[0211] In some embodiments, as Figure 8 and Figure 10 As shown, the insulating member 15 includes an insulating isolation wall 151 . The insulating isolation wall 151 is partially located between the first bus bar 31 and the second bus bar 32 . The first bus bar 31 and the second bus bar 32 are respectively in contact with the insulating isolation wall 151 .

[0212] In some embodiments, as Figure 8 and Figure 10 As shown, the first end edge 311 (eg Figure 10 The lower edge of the first busbar 31 shown in FIG. 1 and the second edge 321 of the second busbar 32 are respectively in contact with the insulating isolation wall 151 (eg Figure 10 The upper edge of the first busbar 31 is shown).

[0213] The first busbar 31 and the second busbar 32 are insulated from each other by the insulating isolation wall 151 , thereby reducing the risk of short circuit between the busbars 3 .

[0214] In some embodiments, the insulating isolation wall 151 has a first reinforcing rib 15111 protruding from the side facing the first busbar 31, and a second reinforcing rib 15112 protruding from the side facing the second busbar 32. A first recess 3111 is provided on the first busbar 31, and a second recess 3211 is provided on the second busbar 32. The first recess 3111 cooperates with the first reinforcing rib 15111, and the second recess 3211 cooperates with the second reinforcing rib 15112. Of course, the insulating isolation wall 151 may further be provided with more reinforcing ribs.

[0215] The insulating barrier 151 has a first reinforcing rib 15111 on the side facing the first end edge 311 and a second reinforcing rib 15112 on the side facing the second end edge 321. The first reinforcing rib 15111 extends perpendicularly to the first end edge 311, while the second reinforcing rib 15112 extends perpendicularly to the second end edge 321. A first recess 3111 is provided at the first end edge 311, while a second recess 3211 is provided at the second end edge 321. The first recess 3111 engages with the first reinforcing rib 15111, while the second recess 3211 engages with the second reinforcing rib 15112. Of course, the insulating barrier 151 may further include more reinforcing ribs.

[0216] The first recessed portion 3111 may be formed by a surface of the first end edge 311 (eg Figure 10 The lower surface shown in FIG. 3 is concave along the second direction Z and away from the second end edge 321. The second concave portion 3211 can be formed by the surface of the second end edge 321 (eg Figure 10 The upper surface shown in FIG. 3 is concave along the second direction Z and away from the first end edge 311 .

[0217] When different battery cells 10 are connected via the busbar 3, the busbar 3 can be positioned by engaging the recessed portion with the reinforcing ribs, thereby improving the positioning accuracy of the busbar 3. In some embodiments, the first reinforcing rib 15111 is spaced apart from the second reinforcing rib 15112. Furthermore, along the extension direction of the first end edge 311 and the second end edge 321, the first reinforcing rib 15111 and the second reinforcing rib 15112 are spaced apart.

[0218] The distance between the first reinforcing rib 15111 and the second reinforcing rib 15112 is not specifically limited here, but it must be able to enable the first recessed portion 3111 to cooperate with the first reinforcing rib 15111 , and the second recessed portion 3211 to cooperate with the second reinforcing rib 15112 .

[0219] This can further increase the strength of the insulating partition wall 151 and further improve the positioning accuracy of the busbar 3 .

[0220] In some embodiments, as Figure 21 As shown, the battery device 100 includes a box body, and each battery cell 10 is accommodated in the box body. At least one box wall of the box body has a boss 111a, and the boss 111a forms a receiving portion 111b on the side facing the battery cell 10. The first electrode terminal 13, the second electrode terminal 14, the busbar 3 assembly and at least a part of the insulating member 15 are accommodated in the receiving portion 111b.

[0221] Thus, only the height of the box where the first electrode terminal 13 , the second electrode terminal 14 and the current bus 3 are located can be increased, thereby reducing the size of the battery device 100 and improving the volume utilization of the battery device 100 .

[0222] The third aspect of the present application provides an electric device, which includes the battery cell 10 provided in the first aspect or the battery device 100 provided in the second aspect, and the battery cell 10 or the battery device 100 is used to store or provide electric energy.

[0223] This can reduce the risk of short circuit between the first electrode terminal 13 and the second electrode terminal 14 in the electrical device, and can also reduce the risk of overlapping between the busbars 3 on the first electrode terminal 13 and the second electrode terminal 14 .

[0224] A fourth aspect of the present application provides an energy storage device, which includes the battery cell 10 provided in the first aspect or the battery device 100 provided in the second aspect, and the battery cell 10 or the battery device 100 is used to store or provide electrical energy.

[0225] In this way, the short circuit risk of the first electrode terminal 13 and the second electrode terminal 14 in the energy storage device can be reduced, and the risk of overlapping between the busbars 3 on the first electrode terminal 13 and the second electrode terminal 14 can also be reduced.

[0226] In one specific embodiment, a plastic partition is provided in the area where there is a straight line connection between the positive and negative poles. This increases the difficulty of overlapping the positive and negative poles and reduces the risk of short circuiting the outer ends of the positive or negative poles. Providing a localized reinforcement at the plastic partition can improve the strength of the plastic partition, and the reinforced portion cooperates with the groove on the busbar 3 to improve the positioning accuracy of the busbar 3.

[0227] by Figure 5 Taking the shown orientation as an example, the distance between the upper surface of the plastic partition and the lower surface of the busbar 3 along the wall thickness direction X of the first shell wall 11 is in the range of 0.2 mm to 10 mm. Furthermore, along the wall thickness direction X of the first shell wall 11, the upper surface of the plastic partition is higher than the upper surface of the busbar 3.

[0228] The various embodiments / implementations provided in this application can be combined with each other without causing any contradiction. The above are merely preferred embodiments of this application and are not intended to limit this application. For those skilled in the art, this application may be modified and varied in various ways. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of this application shall be included in the scope of protection of this application.

Claims

1. A battery cell, characterized in that: include: A housing having a receiving space, wherein the housing includes a first housing wall; an electrode assembly, at least partially disposed in the accommodation space, the electrode assembly comprising a first electrode tab and a second electrode tab with opposite polarities; A first electrode terminal and a second electrode terminal are respectively provided on the first housing wall, the first electrode terminal is electrically connected to the first electrode tab, and the second electrode terminal is electrically connected to the second electrode tab; an insulating member, at least partially disposed between the first electrode terminal and the second electrode terminal; Along the wall thickness direction of the first housing wall and away from the accommodating space, a portion of the insulating member located between the first electrode terminal and the second electrode terminal exceeds upper surfaces of both the first electrode terminal and the second electrode terminal.

2. The battery cell according to claim 1, wherein: The first electrode terminal has a first protrusion protruding from the outer surface of the first housing wall, and the second electrode terminal has a second protrusion protruding from the outer surface of the first housing wall, with a gap formed between the first protrusion and the second protrusion; The insulating member includes an insulating isolation wall, which is arranged in the gap to isolate the first protrusion and the second protrusion, and the insulating isolation wall extends beyond the first protrusion and the second protrusion along the wall thickness direction of the first shell wall and away from the accommodating space.

3. The battery cell according to claim 2, characterized in that: The insulating member includes an insulating bottom wall and the insulating isolation wall; The insulating bottom wall is provided between at least one of the first protrusion and the second protrusion and the first housing wall. The insulating isolation wall is connected to the insulating bottom wall.

4. The battery cell according to claim 3, characterized in that The insulating bottom wall is provided between the first protrusion, the second protrusion and the first housing wall. The insulating bottom wall and the insulating isolation wall are formed as an integral piece.

5. The battery cell according to claim 3, characterized in that: The insulating member further includes an insulating side wall connected to the insulating bottom wall and extending along the wall thickness direction of the first shell wall, and the insulating side wall is arranged around at least one of the first protrusion and the second protrusion. Along the wall thickness direction of the first housing wall, the insulating isolation wall is arranged at a position farther away from the first housing wall than the insulating side wall.

6. The battery cell according to claim 5, characterized in that The insulating sidewall includes a first sidewall portion and a second sidewall portion located in the gap, the first sidewall portion is disposed close to the first protrusion, and the second sidewall portion is disposed close to the second protrusion. The insulating member further includes a connecting wall, the connecting wall being mounted between the first side wall portion and the second side wall portion. The insulating isolation wall is provided on the connecting wall and extends from the connecting wall along a wall thickness direction of the first housing wall toward a direction away from the first housing wall.

7. The battery cell according to claim 5, characterized in that The insulating member further includes a protruding wall connected to an end of the insulating side wall away from the insulating bottom wall along the wall thickness direction. Along the wall thickness direction of the first housing wall, a projection of at least one of the first protrusion and the second protrusion has an overlapping portion with a projection of the extended wall in the same projection plane.

8. The battery cell according to claim 7, characterized in that The insulating isolation wall is provided on the protruding wall and extends in a direction away from the first shell wall.

9. The battery cell according to any one of claims 2 to 8, characterized in that: The insulating isolation wall has at least one reinforcing rib, and the reinforcing rib extends along the wall thickness direction of the first shell wall.

10. The battery cell according to any one of claims 2 to 8, characterized in that: Along the wall thickness direction of the first shell wall and away from the accommodating space, the insulating isolation wall exceeds both the first protrusion and the second protrusion, and has at least one reinforcing rib at least in the exceeding portion.

11. The battery cell according to claim 9, characterized in that The reinforcing rib is protruding from a surface of the insulating isolation wall facing the first electrode terminal and / or the second electrode terminal.

12. The battery cell according to any one of claims 2 to 8, characterized in that: The first protrusion includes a first main body portion and a first extension portion connected to each other, The second protrusion includes a second main body portion and a second extension portion connected to each other, The gap includes a first gap formed between the first extension portion and the second extension portion, and the insulating isolation wall is provided at least in the first gap.

13. The battery cell according to claim 12, characterized in that: A second gap is further formed between the first main portion and the second extending portion, and the insulating isolation wall is provided in the first gap and the second gap.

14. The battery cell according to claim 13, characterized in that The first main body has a first extension extending along a first direction, and the second extension has a first step formed by being partially recessed along the wall thickness direction; along the wall thickness direction, the first extension covers a portion of the first step from a side facing away from the first shell wall; and along the first direction, a first gap exists between the first extension and a first step surface of the first step perpendicular to the first direction, wherein the first direction is perpendicular to the wall thickness direction and coincides with the extension direction of the first extension and the second extension. The first gap constitutes at least a portion of the second gap.

15. The battery cell according to claim 13, characterized in that A third gap is further formed between the second main body portion and the first extension portion, and the insulating isolation wall is provided in the first gap, the second gap, and the third gap.

16. The battery cell according to claim 15, characterized in that The second main body portion has a second extension portion extending along the first direction, and the first extension portion has a second step portion formed by being partially recessed along the wall thickness direction; along the wall thickness direction, the second extension portion covers a portion of the second step portion from a side away from the first shell wall; and along the first direction, a second gap exists between the second extension portion and a second step surface of the second step portion that is perpendicular to the first direction. The second gap constitutes at least a portion of the third gap.

17. The battery cell according to claim 15, characterized in that The first slit extends along a first direction, the second slit and the third slit extend along a second direction, the first direction and the second direction are perpendicular to each other and perpendicular to the wall thickness direction, The insulating isolation wall is located in the first gap, the second gap and the third gap and is formed as an integral part.

18. A battery device, characterized in that: include: The battery cell according to any one of claims 1 to 17.

19. The battery device according to claim 18, wherein: A plurality of the battery cells are arranged one above the other; The battery device further comprises: A busbar assembly electrically connects the battery cells adjacent to each other along the arrangement direction of the battery cells. The busbar assembly includes a first busbar and a second busbar. In the same battery cell, along the thickness direction of the first shell wall, the first busbar is arranged on a side of the first electrode terminal away from the first shell wall, and the second busbar is arranged on a side of the second electrode terminal away from the first shell wall. Along a wall thickness direction of the first housing wall and facing away from the accommodation space, the insulating member extends beyond surfaces of the first electrode terminal and the second electrode terminal that are away from the first housing wall.

20. The battery device according to claim 19, wherein: Along the wall thickness direction of the first housing wall and facing away from the accommodating space, the insulating member extends beyond the surfaces of the first busbar and the second busbar that are away from the first housing wall.

21. The battery device according to claim 20, characterized in that The insulating member includes an insulating isolation wall, wherein the insulating isolation wall is partially located between the first busbar and the second busbar. The first busbar and the second busbar are respectively in contact with the insulating isolation wall.

22. The battery device according to claim 21, characterized in that The insulating isolation wall is provided with a first reinforcing rib on a side facing the first busbar, and a second reinforcing rib on a side facing the second busbar. The first busbar is provided with a first recessed portion, and the second busbar is provided with a second recessed portion. The first recessed portion cooperates with the first reinforcing rib, and the second recessed portion cooperates with the second reinforcing rib.

23. The battery device according to claim 22, characterized in that The first reinforcing ribs and the second reinforcing ribs are spaced apart.

24. The battery device according to any one of claims 19 to 23, characterized in that The battery device includes a box body, and each of the battery cells is accommodated in the box body. At least one box wall of the box body has a boss, and the boss forms a receiving portion on a side facing the battery cell. At least a portion of the first electrode terminal, the second electrode terminal, the busbar assembly, and the insulating member is accommodated in the accommodation portion.

25. An electrical device, characterized in that: The battery cell according to any one of claims 1 to 17 or the battery device according to any one of claims 18 to 24 is used to store or provide electrical energy.

26. An energy storage device, characterized in that: The battery cell according to any one of claims 1 to 17 or the battery device according to any one of claims 18 to 24 is used for storing or providing electrical energy.

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