Battery cell, battery, electrical apparatus, and energy storage apparatus

Abstract

A battery cell (121), a battery (10), an electrical apparatus, and an energy storage apparatus (200). The battery cell (121) comprises: a casing (1211), the casing (1211) having a first wall (1211a); a first pole (1213a) and a second pole (1213b), which are disposed on the first wall (1211a), wherein the first pole (1213a) and the second pole (1213b) are arranged in a first direction, and in the first direction, the farthest distance between the outer contours of the first pole (1213a) and the second pole (1213b) is less than one-half the size of the first wall (1211a).

Description

Battery cells, batteries, electrical devices and energy storage devices Technical Field

[0001] The present disclosure relates to the field of battery technology, and in particular to a battery cell, a battery, an electrical device, and an energy storage device. 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] To cope with various battery grouping scenarios, the industry has a variety of battery cell shapes, such as cylindrical battery cells, square shell battery cells, and blade-shaped battery cells. Blade-shaped battery cells, especially those with longer lengths, have relatively poor deformation resistance. Therefore, how to improve the strength of longer battery cells, especially the strength of long blade-shaped battery cells (also known as long blade battery cells), is one of the research directions in the industry.

[0004] Summary of the Invention

[0005] In view of this, the present disclosure aims to provide a battery cell, a battery, an electrical device, and an energy storage device capable of improving the strength of a battery casing.

[0006] In order to achieve the above objectives, the present disclosure adopts the following technical solutions.

[0007] A first aspect of the present disclosure provides a battery cell, comprising: a shell having a first wall; a first pole and a second pole, arranged on the first wall, wherein the first pole and the second pole are arranged along a first direction, and along the first direction, the maximum distance between the outer contours of the first pole and the second pole is less than half the size of the first wall.

[0008] Because both the first and second poles are disposed on the first wall and the maximum distance between their outer contours is less than half the size of the first wall, the first and second poles are centrally located relative to the entire first wall. This coordination of the two pole structures enhances the strength of the pole-distribution area within the first wall, reducing the risk of deformation in the area. Furthermore, centrally locating the first and second poles maximizes utilization of the remaining space within the first wall and facilitates centralized handling of the poles and their attached components during processing and maintenance.

[0009] In the battery cell of some embodiments, along the first direction, the maximum distance between the outer contours of the first pole and the second pole does not exceed 40% of the dimension of the first wall.

[0010] By setting the maximum distance between the outer contours of the first pole and the second pole to no more than 40% of the full length of the first wall, the mutual coordination between the first pole and the second pole can be enhanced, which is more conducive to improving the strength of the pole configuration area in the first wall and reducing the risk of bending deformation.

[0011] In the battery cell of some embodiments, the first direction is consistent with the length direction of the first wall, and the first pole and the second pole are arranged at intervals from each other along the length direction.

[0012] Along the length direction of the first wall, the risk of deformation of the first wall is greater or the deformation amount is greater. By concentrating the first pole and the second pole along the length direction, the risk of deformation in the pole configuration area is reduced; and a larger space can be reserved in the length direction of the first wall, which is conducive to full utilization of other space of the first wall.

[0013] In the battery cell of some embodiments, the first direction is consistent with the width direction of the first wall, and the first pole and the second pole are arranged at intervals from each other along the width direction.

[0014] By arranging the first and second poles along the width direction, the strength of the pole arrangement area in the first wall can be increased, which helps reduce the risk of deformation of the first wall. In addition, by concentrating the first and second poles along the width direction, it is more conducive to fully utilizing the remaining space in the first wall.

[0015] In some embodiments of the battery cell, the first pole and the second pole are both arranged on the same side of the first wall along the first direction, or the first pole and the second pole are both arranged near the middle position of the first wall in the first direction.

[0016] By arranging both the first and second poles on the same side in the longitudinal or width direction, the strength of the pole-arrangement area of ​​the first wall can be improved while facilitating the utilization of other areas of the first wall. Furthermore, the poles can be coordinated with other wall surfaces at the edges, improving assembly ease. In particular, by arranging the first and second poles near the middle of the longitudinal direction, the middle area, where deformation is more likely, can be reinforced, thereby evenly improving the overall strength of the first wall.

[0017] In the battery cell of some embodiments, the first wall has a boss that protrudes relative to the first wall in a direction away from the first wall, and at least either the first pole or the second pole is disposed on the boss.

[0018] By providing the pole with a boss, the strength of the first wall can be further improved through the boss, thereby reducing the risk or amount of deformation.

[0019] In the battery cell of some embodiments, the number of the boss is one; the boss is arranged on one side of the first wall in the first direction, or the boss is arranged in the middle position of the first wall in the first direction.

[0020] By arranging the first pole and / or the second pole on the boss, the strength of the first wall can be further improved through the cooperation between the boss and the pole.

[0021] In the battery cell of some embodiments, the number of the bosses is two, one of the bosses is provided with the first pole, the other boss is provided with the second pole, and the two bosses are arranged along the first direction.

[0022] By arranging the first pole and the second pole on two bosses respectively, it is beneficial to improve the degree of freedom of arrangement of the bosses and to reduce the space occupied by the bosses.

[0023] In the battery cell of some embodiments, the two bosses are arranged spaced apart from each other near the middle of the first wall, or the two bosses are arranged on the same side of the first wall in the first direction.

[0024] The strength of the first wall of the battery can be improved by the two bosses and the poles arranged on the bosses.

[0025] In the battery cell of some embodiments, a projected area of ​​the boss projected onto the first wall along the thickness direction of the first wall accounts for 10% to 30% of the area of ​​the first wall.

[0026] By providing a boss of appropriate size, it is possible to provide a pole, improve the strength of the first wall, and reduce the occupied space.

[0027] In some embodiments of the battery cell, the dimension of the boss in the second direction does not exceed 500 mm, wherein, in the plane where the first wall is located, the second direction is perpendicular to the first direction; and / or the height dimension of the boss relative to the first wall does not exceed 300 mm.

[0028] By providing a boss of appropriate size, it is possible to provide a pole, improve the strength of the first wall, and reduce the occupied space.

[0029] In the battery cell of some embodiments, the dimension of the boss in the second direction ranges from 100 mm to 400 mm; and / or the height dimension of the boss ranges from 20 mm to 100 mm.

[0030] By providing a boss of appropriate size, it is possible to provide a pole, improve the strength of the first wall, and reduce the occupied space.

[0031] In the battery cell of some embodiments, a lengthwise dimension of the first wall is greater than or equal to 350 mm.

[0032] Concentrating the first pole and the second pole is more conducive to improving the strength of the first wall of a battery with a longer length.

[0033] In the battery cell of some embodiments, the distance between the outer contours of the first and second poles and the end edge of the first wall in the first direction is not less than 5% of the dimension of the first wall in the first direction.

[0034] By limiting the distance between the pole and the end edge in the length direction of the first wall, it is beneficial to improve the ease of assembly by virtue of the constraint effect of other wall surfaces at the end edge.

[0035] In the battery cell of some embodiments, a distance between the outer contours of the first and second poles and an end edge of the first wall in the first direction is in a range of 8.75 mm to 600 mm.

[0036] As a result, the electrode can be arranged at an appropriate position on the first wall, and the conductive function can be reliably exerted while reinforcing the first wall.

[0037] In some embodiments of the battery cell, the first wall is the end cover of the battery cell; or, the first wall is the wall with the largest area in the shell; or, the first wall is the wall of the shell facing the end cover.

[0038] This allows the terminals to be positioned with greater freedom of position within the battery housing. Even if the wall of the housing where the terminals are to be positioned is at risk of significant deformation, the concentrated positioning of the terminals can reduce this deformation.

[0039] A second aspect of the present disclosure provides a battery, comprising: a box, and a plurality of battery cells according to the first aspect of the present disclosure.

[0040] This makes it possible to provide a battery in which the outer shell of the battery cell is less likely to deform or has a smaller deformation amount.

[0041] In some embodiments of the battery, the first direction is consistent with the length direction of the battery cell, and the plurality of battery cells are arranged along the width direction of the first wall, so that the first pole and the second pole are respectively arranged along the width direction of the first wall.

[0042] This makes it possible to easily group the battery cells and easily connect the first and second electrodes.

[0043] In some embodiments of the battery, the box body includes a box wall facing the first wall, and a accommodating portion is formed on the side of the box wall facing the first wall. The battery also includes a busbar and an electrical kit. The busbar is used to connect one of the first pole and the second pole in one battery cell to one of the first pole and the second pole in another battery cell. The electrical kit includes at least one of a sampling structure, a battery management system, a relay, and a high-voltage distribution unit. The accommodating portion accommodates at least part of the first pole, the second pole, the busbar, and the electrical kit.

[0044] Therefore, by forming a accommodating portion between the box wall of the battery facing the first wall and the first wall of the battery cell, and accommodating the pole, busbar, electrical kit, etc. in whole or in part in the accommodating portion, it is beneficial to suppress the overall volume of the battery box and improve the overall volume utilization of the battery box.

[0045] In some embodiments of the battery, a protrusion is provided on the box wall facing the first wall, the protrusion protruding from the box wall in a direction away from the first wall, and the accommodating portion includes a space on a side of the protrusion facing the first wall.

[0046] Therefore, by providing a protrusion on the battery case to form a accommodating portion, and accommodating the pole, busbar, electrical kit, etc. in whole or in part in the accommodating portion, it is beneficial to further suppress the overall volume of the battery case and improve the overall volume utilization of the battery case.

[0047] In some embodiments of the battery, the battery further includes a heat exchange component, which is arranged on the first wall of each of the battery cells and is used to exchange heat with each of the battery cells. Along the thickness direction of the first wall, the projections of the first pole and the second pole on the first wall do not overlap with the projection of the heat exchange component on the first wall.

[0048] In this way, heat exchange can be achieved by utilizing the area outside the pole arrangement area on the first wall of the battery cell, which is beneficial to suppressing the overall volume of the battery case and improving the volume utilization rate within the battery case.

[0049] In some embodiments of the battery, the first walls of the plurality of battery cells form a first surface, the first surface has a first area and a second area, the first pole and the second pole are arranged in the first area, the heat exchange component is arranged in the second area, the number of the second areas is two, and the two second areas are respectively located on both sides of the first area.

[0050] The battery cells can be arranged so that the first pole and the second pole are concentrated in the first area. By arranging heat exchange components on both sides of the first area, heat exchange with the battery cells as a whole is facilitated, and the strength of the first wall of the battery cells is further improved.

[0051] In some embodiments of the battery, the first walls of the plurality of battery cells form a first surface, the first surface has a first area and a second area, the first pole and the second pole are arranged in the first area, the heat exchange component is arranged in the second area, the number of the first areas is two, and the second area is located between the two first areas.

[0052] The battery cells can be arranged so that the first pole and the second pole are concentrated on both sides of the second area. By arranging the heat exchange component in the second area between the two first areas where the poles are set, heat exchange with the battery cells is facilitated, and the strength of the first wall of the battery cells is also improved.

[0053] In some embodiments of the battery, the area of ​​the second region is larger than the area of ​​the first region.

[0054] By configuring the first pole and the second pole and arranging the battery cells, the second region where no pole is provided can have a larger area, thereby facilitating providing a larger configuration space for the heat exchange component.

[0055] In some embodiments of the battery, the heat exchange assembly includes: a heat exchange plate; and an adhesive layer, which is arranged on the side of the heat exchange plate close to the first wall, and the heat exchange plate is adhered to the first wall of the battery cell through the adhesive layer, or is arranged on the side of the heat exchange plate away from the first wall, and the heat exchange plate is adhered to the box wall through the adhesive layer.

[0056] Since the heat exchange assembly is bonded to the first wall of the battery cell and / or the box wall, it is beneficial to improve the strength of the first wall of the battery cell and further reduce the deformation risk or deformation amount.

[0057] In some embodiments of the battery, the distance between the top ends of the first pole and the second pole along the thickness direction of the first wall and the first wall is not less than the height of the heat exchange assembly along the thickness direction of the first wall.

[0058] Since the heat exchange assembly does not extend beyond the pole along the thickness direction of the first wall, it is beneficial to suppress the overall volume of the battery and improve the volume utilization of the battery.

[0059] In some embodiments of the battery, a through hole is provided in the box wall of the box body facing the first wall of the battery cell, and the box wall with the through hole is used as the first box wall. Along the thickness direction of the first box wall, the projections of the first pole and the second pole on the first box wall at least partially fall within the range of the through hole.

[0060] Since the first pole and the second pole are arranged together, the first pole and the second pole can be easily inspected and maintained by providing a through hole in the first box wall.

[0061] In some embodiments of the battery, the first box wall is provided with a protrusion protruding in a direction away from the battery cell, the through hole is opened in the protrusion, the protrusion is formed integrally with the first box wall, or the protrusion is formed detachably relative to the first box wall.

[0062] Since the first box wall is provided with a protruding portion and the through hole is provided in the protruding portion, the first pole, the second pole and other components extending into the protruding portion can be observed and maintained through the through hole.

[0063] In some embodiments of the battery, the battery further includes a closing cover for closing the through hole.

[0064] Thus, the through hole can be closed with the closing cover when not in use, thereby preventing foreign matter from entering the battery case.

[0065] In some embodiments of the battery, the battery further includes a busbar and an electrical kit, the busbar being used to connect one of the first pole and the second pole in one battery cell to one of the first pole and the second pole in another battery cell, and the electrical kit including at least one of a sampling structure, a battery management system, a relay, and a high-voltage distribution unit; along the thickness direction of the first box wall, the projections of the busbar and the electrical kit on the first box wall at least partially fall within the range of the through hole.

[0066] By providing a protrusion on the battery case to form a receiving portion, and accommodating the pole, busbar, electrical kit, etc. in the receiving portion, it is not only beneficial to suppress the overall volume of the battery case and improve the overall volume utilization of the battery case, but also beneficial to observe, maintain, and perform other operations on more components through the through holes.

[0067] A third aspect of the present disclosure provides an electric device, which includes a plurality of battery cells provided in the first aspect or the battery provided in the second aspect, and the battery cells or the battery serve as a power source for the vehicle.

[0068] As a result, it is possible to provide an electric device equipped with a battery whose housing of a battery cell is not easily deformed or has a small deformation, thereby contributing to reducing maintenance time.

[0069] In some embodiments of the present disclosure, the electric device includes a vehicle.

[0070] This makes it possible to provide a vehicle equipped with a battery whose battery cell casing is less susceptible to deformation or has a small deformation amount, thereby contributing to reducing maintenance time.

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

[0072] Thus, an energy storage device can be provided in which a housing of a battery cell is mounted and is not easily deformed or has a small deformation, thereby reducing maintenance time. BRIEF DESCRIPTION OF THE DRAWINGS

[0073] FIG1 is a schematic structural diagram of a vehicle provided by an embodiment of the present disclosure;

[0074] FIG2 is a schematic diagram of a battery cell provided by an embodiment of the present disclosure;

[0075] FIG3 is a schematic diagram of a battery cell provided by another embodiment of the present disclosure;

[0076] FIG4 is a schematic diagram of a battery cell provided by another embodiment of the present disclosure;

[0077] FIG5 is a schematic diagram of a battery cell with a boss provided in one embodiment of the present disclosure;

[0078] FIG6 is a schematic diagram of a battery cell with a boss provided in another embodiment of the present disclosure;

[0079] FIG7 is a schematic diagram of a battery cell with a boss provided in yet another embodiment of the present disclosure;

[0080] FIG8 is a schematic diagram of a battery cell with a boss provided in yet another embodiment of the present disclosure;

[0081] FIG9 is an exploded perspective diagram of a battery cell provided by an embodiment of the present disclosure;

[0082] FIG10 is an exploded perspective view of a battery cell with a boss provided in one embodiment of the present disclosure;

[0083] FIG11 is a schematic top view of a battery cell provided in one embodiment of the present disclosure;

[0084] FIG12 is another schematic top view of a battery cell provided by an embodiment of the present disclosure;

[0085] FIG13 is a schematic front view of a battery cell provided in one embodiment of the present disclosure;

[0086] FIG14 is a schematic front view of a battery cell with a boss provided in one embodiment of the present disclosure;

[0087] FIG15 is an exploded perspective view of a battery provided in one embodiment of the present disclosure;

[0088] FIG16 is a schematic diagram of a partial structure of the battery shown in FIG15 ;

[0089] FIG17 is a perspective schematic diagram of a battery provided in another embodiment of the present disclosure;

[0090] FIG18 is a schematic diagram of the AA cross-sectional view in FIG17;

[0091] FIG19 is an enlarged schematic diagram of portion B in FIG18 ;

[0092] FIG20 is an exploded perspective view of a battery provided in yet another embodiment of the present disclosure;

[0093] FIG21 is a schematic structural diagram of a seat and a battery in a vehicle provided in one embodiment of the present disclosure;

[0094] FIG22 is a schematic structural diagram of an energy storage device provided in an embodiment of the present disclosure.

[0095] Explanation of the reference numerals 100, vehicle; 10, battery; 11, housing; 111a, housing accommodating cavity; 111b, accommodating portion; 111, housing wall; 1111, protrusion; 1112, closing cover; 1113, through hole; 120, first surface; 120a, first area; 120b, second area; 121, battery cell; 1211, outer shell; 1211a, first wall; 1211b, shell; 1213a, first pole; 1213b, second pole; 1214, boss; 1216, electrode assembly; 1217, pole ear; 122, busbar; 123, electrical kit; 14, heat exchange plate; 15, first adhesive layer; 16, second adhesive layer; 20, seat; 200, energy storage device; 201, bracket. DETAILED DESCRIPTION

[0096] It should be noted that, unless there is a conflict, the embodiments and technical features in the embodiments of the present disclosure can be combined with each other, and the detailed description in the specific implementation methods should be understood as an explanation of the purpose of the present disclosure and should not be regarded as an improper limitation on the present disclosure.

[0097] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as commonly understood by those skilled in the art to which the present disclosure belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure; the terms "including" and "having" and any variations thereof in the specification of the present disclosure and the above-mentioned drawings are intended to cover non-exclusive inclusions.

[0098] Currently, new energy batteries are increasingly being used in daily life and industry. They are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in aerospace and other fields.

[0099] In order to cope with various battery grouping scenarios, the industry has battery cells of various shapes, such as cylindrical battery cells, square shell battery cells, and blade-shaped battery cells. For blade-shaped battery cells, especially blade-shaped battery cells with longer lengths (also called long-blade battery cells), since their outer shells have walls with longer spans in the length direction, these walls have poor deformation resistance and are prone to deformation. In the related art, the positive and negative poles of the battery cell are respectively arranged near the two ends of the end caps extending along the length direction of the battery cell, and there is a risk that the middle span is longer and prone to deformation. Moreover, the pole position is a protruding position of the battery cell, which is more susceptible to external forces, which also leads to insufficient strength of the pole configuration area and easy deformation. Therefore, how to improve the strength of battery cells with longer lengths, especially the strength (anti-deformation ability) of long blade-shaped battery cells is one of the research directions of the industry.

[0100] After research, it was found that by centrally arranging the positive and negative poles on the longer wall or end cover in the shell of the battery cell, the two poles cooperate with each other to strengthen the strength of the wall or end cover (especially the pole configuration area), thereby suppressing deformation.

[0101] Based on such a technical concept, the present disclosure provides a battery cell, which includes a shell having a first wall and a first pole and a second pole arranged on the first wall, wherein the first pole and the second pole are arranged along a first direction, and along the first direction, the maximum distance between the outer contours of the first pole and the second pole is less than half the size of the first wall.

[0102] Since the first pole and the second pole are both arranged on the first wall and the maximum distance between the outer contours of the first pole and the second pole is less than half the size of the first wall, the first pole and the second pole are centrally arranged relative to the entire first wall. Therefore, through the mutual cooperation of the two pole structures, the strength of the pole arrangement area in the first wall can be improved, which is conducive to reducing the risk of deformation of the first wall (especially the pole arrangement area).

[0103] The battery cells disclosed herein can be used, but are not limited to, in electrical devices such as vehicles, ships, or aircraft. The battery cells, batteries, etc. disclosed herein can be used to form a power supply system for the electrical device.

[0104] The present disclosure provides an electric device using a battery as a power source. The electric device may be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery-powered vehicle, an electric car, a ship, a spacecraft, etc. The electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc. The spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0105] For the convenience of description, the following description will be made by taking a vehicle 100 as an example of an electrical device according to an embodiment of the present disclosure.

[0106] FIG1 is a schematic structural diagram of a vehicle 100 provided in an embodiment of the present disclosure. The vehicle 100 may be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. As shown in FIG21 , a battery 10 is provided inside the vehicle 100. The battery 10 can be provided at the bottom, head or tail of the vehicle 100. The battery 10 can be used to power the vehicle 100. For example, the battery 10 can serve as an operating power source for the vehicle 100. The vehicle 100 may further include a controller and a motor. The controller is used to control the battery 10 to power the motor, for example, for starting, navigating and operating power requirements of the vehicle 100 during driving.

[0107] In some embodiments of the present disclosure, the battery 10 can serve not only as an operating power source for the vehicle 100 , but also as a driving power source for the vehicle 100 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 100 .

[0108] In the present disclosure, a battery includes a plurality of battery cells. A battery cell refers to a basic unit that can realize the mutual conversion of chemical energy and electrical energy, and can be used to make a battery module or battery pack, thereby being used to supply power to an electrical device. A battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active material after the battery cell is discharged and can continue to be used. The battery cell can be a lithium-ion battery, a sodium-ion battery, a sodium-lithium-ion battery, a lithium metal battery, a sodium metal battery, a lithium-sulfur battery, a magnesium-ion battery, a nickel-metal hydride battery, a nickel-cadmium battery, a lead-acid battery, etc., and the present disclosure does not limit this.

[0109] A battery cell typically includes an electrode assembly. This assembly includes a positive electrode, a negative electrode, and a separator. During the charge and discharge process of a battery cell, active ions (such as lithium ions) are inserted and removed between the positive and negative electrodes. The separator, placed between the positive and negative electrodes, prevents short circuits between the positive and negative electrodes while allowing the active ions to pass through.

[0110] In some embodiments, the battery cell further includes an electrolyte, which acts as a conductor of ions between the positive and negative electrodes. The present disclosure does not specifically limit the type of electrolyte, and the electrolyte may be selected based on needs. The electrolyte may be liquid, gel, or solid.

[0111] In some embodiments, a battery cell may include a housing. The housing is used to encapsulate components such as the electrode assembly and the electrolyte. The housing may be a steel housing, an aluminum housing, a plastic housing (e.g., polypropylene), a composite metal housing (e.g., a copper-aluminum composite housing), or an aluminum-plastic film.

[0112] As an example, the battery cells may be cylindrical, prismatic, soft-pack or other shaped battery cells. Prismatic battery cells include square-shell, blade-shaped, and polygonal batteries. Polygonal batteries may be, for example, hexagonal batteries.

[0113] In some embodiments, the housing includes an end cap and a shell. The shell has an opening, and the end cap closes the opening to form a sealed space for accommodating the electrode assembly, electrolyte, and other substances. The shell may have one or more openings. One or more end caps may also be provided.

[0114] In some embodiments, the housing is provided with at least one electrode terminal (also called a "pole"), which is electrically connected to the tab. The electrode terminal can be directly connected to the tab or indirectly connected to the tab via an adapter component. The electrode terminal can be provided on the end cap or on the housing. In some embodiments, the housing is provided with a pressure relief mechanism. The pressure relief mechanism is used to release the internal pressure of the battery cell.

[0115] In the embodiments of the present disclosure, the battery may also be a single physical module (e.g., a battery module or battery pack) including one or more battery cells to provide higher voltage and capacity. When there are multiple battery cells, the multiple battery cells are connected in series, in parallel, or in hybrid via a busbar.

[0116] In the description of this disclosure, technical terms such as "first," "second," "third," and "fourth" are used solely to distinguish between different objects and should not be understood to indicate or imply relative importance or to implicitly specify the quantity, specific order, or primary and secondary relationship of the technical features indicated. In the description of this disclosure, "plurality" means more than two, unless otherwise specifically defined.

[0117] 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 disclosure. 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.

[0118] In the description of this disclosure, 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 three situations: 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.

[0119] In the description of the embodiments of the present disclosure, for ease of explanation, the direction indicated by arrow a is the "length direction of the battery cell" and the "length direction of the first wall", the direction indicated by arrow b is the "width direction of the battery cell" and the "width direction of the first wall", and the direction indicated by arrow c is the "height direction of the battery cell". The direction indicated by arrow X is the "height direction of the battery" and the "height direction of the vehicle", the direction indicated by x1 is the "top" and "above", and the direction indicated by x2 is the "bottom" and "below", the direction indicated by arrow Y is the "length direction of the battery" and the "length direction of the vehicle", and the direction indicated by arrow Z is the "width direction of the battery" and the "width direction of the vehicle".

[0120] In the description of this disclosure, 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; and 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 disclosure based on specific circumstances.

[0121] In the description of the present disclosure, 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.

[0122] Hereinafter, some embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

[0123] Figure 1 is a structural schematic diagram of a vehicle provided in an embodiment of the present disclosure; Figure 2 is a schematic diagram of a battery cell provided in an embodiment of the present disclosure; Figure 3 is a schematic diagram of a battery cell provided in another embodiment of the present disclosure; Figure 4 is a schematic diagram of a battery cell provided in yet another embodiment of the present disclosure; Figure 5 is a schematic diagram of a battery cell with a boss provided in an embodiment of the present disclosure; Figure 6 is a schematic diagram of a battery cell with a boss provided in another embodiment of the present disclosure; Figure 7 is a schematic diagram of a battery cell with a boss provided in yet another embodiment of the present disclosure; Figure 8 is a schematic diagram of a battery cell with a boss provided in yet another embodiment of the present disclosure; Figure 9 is an exploded three-dimensional schematic diagram of a battery cell provided in an embodiment of the present disclosure; Figure 10 is an exploded three-dimensional schematic diagram of a battery cell with a boss provided in an embodiment of the present disclosure; Figure 11 is a top view schematic diagram of a battery cell provided in an embodiment of the present disclosure; Figure 12 is another top view schematic diagram of a battery cell provided in an embodiment of the present disclosure; Figure 13 is a front view schematic diagram of a battery cell provided in an embodiment of the present disclosure; Figure 14 is a top view schematic diagram of a battery cell with a boss provided in an embodiment of the present disclosure.

[0124] According to some embodiments of the present disclosure, as shown in Figures 2 to 4 , a battery cell 121 includes a housing 1211, a first electrode 1213a, and a second electrode 1213b. The housing 1211 has a first wall 1211a, and the first electrode 1213a and the second electrode 1213b are disposed on the first wall 1211a. As shown in Figures 2 to 4 and Figures 11 and 14 , the first electrode 1213a and the second electrode 1213b are arranged along a first direction, and along the first direction (i.e., the direction in which the electrodes are arranged), the maximum distance between the outer contours of the first electrode 1213a and the second electrode 1213b is less than half the size of the first wall 1211a.

[0125] In some embodiments, the housing 1211 is, for example, in the shape of a quadrangular prism, as shown in Figures 9 and 10 , and includes a first wall 1211a and a shell 1211b. Shell 1211b has a storage space within it, which houses an electrode assembly 1216. Electrode assembly 1216 includes two tabs 1217, typically one for the positive electrode and one for the negative electrode. The two tabs 1217 are electrically connected to a first terminal 1213a and a second terminal 1213b, respectively, provided on the first wall 1211a, to allow current to flow between the battery cell and an external power device or charging device.

[0126] The first pole 1213a and the second pole 1213b usually have opposite polarities, that is, one is a positive pole and the other is a negative pole. The first pole 1213a and the second pole 1213b usually have the same shape, of course, it is not limited to this, and can also be designed into different shapes according to the application scenario. In addition, there is no special limitation on the shape of the first pole 1213a and the second pole 1213b, which can be cylindrical, prismatic, or other suitable shapes. The shapes of the first pole 1213a and the second pole 1213b shown in the figures of this disclosure are only examples, and other shapes are also possible.

[0127] As shown in Figures 2 to 4 and Figures 11 and 14, the first pole 1213a and the second pole 1213b are arranged along a certain direction, and the arrangement direction is referred to as the first direction. As shown in Figures 2 and 3, the first direction can be a direction consistent with the length direction a of the battery cell, or a direction consistent with the width direction b of the battery cell. In addition, the arrangement of the first pole 1213a and the second pole 1213b can be an arrangement aligned with each other along the first direction, that is, the projections along the first direction completely overlap; or they can be arranged along the first direction and staggered with each other along a direction perpendicular to the first direction, that is, the projections along the first direction partially overlap or do not overlap. In the present disclosure, as a specific example, the arrangement method of aligning with each other along the first direction is taken as an example for explanation.

[0128] Along the first direction, which serves as the arrangement direction, the maximum distance between the outer contours of the first pole 1213a and the second pole 1213b is less than half the size of the first wall 1211a. The maximum distance between the outer contours of the first pole 1213a and the second pole 1213b refers to the distance in the first direction between the position of the first pole 1213a closest to one side in the first direction and the position of the second pole 1213b closest to the other side in the first direction. In the example shown in Figure 11, the distance L2 is the maximum distance between the outer contours of the first pole 1213a and the second pole 1213b; in the example shown in Figure 14, the distance W2 is the maximum distance between the outer contours of the first pole 1213a and the second pole 1213b. The size of the first wall 1211a along the first direction refers to the total length of the first wall 1211a in the first direction (arrangement direction). In the example shown in FIG. 11 , L1 represents the dimension of the first wall 1211 a along the first direction; in the example shown in FIG. 14 , W1 represents the dimension of the first wall 1211 a along the first direction.

[0129] Furthermore, in the example shown in FIG11 , the distance L2 is the maximum distance between the outer contours of the first pole 1213a and the second pole 1213b, L1 represents the dimension of the first wall 1211a along the first direction, and L1 and L2 satisfy the relationship L2 / L1 is less than 50%. Similarly, in the example shown in FIG14 , the distance W2 is the maximum distance between the outer contours of the first pole 1213a and the second pole 1213b, W1 represents the dimension of the first wall 1211a along the first direction, and W1 and W2 satisfy the relationship W2 / W1 is less than 50%.

[0130] Since the first pole 1213a and the second pole 1213b are both arranged on the first wall 1211a and the maximum distance between the outer contours of the first pole 1213a and the second pole 1213b is less than half the size of the first wall 1211a, the first pole 1213a and the second pole 1213b are centrally arranged relative to the entire first wall 1211a. Therefore, through the mutual cooperation of the two pole structures, the strength of the pole arrangement area in the first wall 1211a and even the entire first wall 1211a can be improved, which helps to reduce the risk of deformation of the first wall 1211a. In addition, by centrally arranging the first pole 1213a and the second pole 1213b, it is beneficial to fully utilize the other space in the first wall 1211a and also facilitate the centralized handling of the poles and their attached components during processing and maintenance (described in detail later).

[0131] In some embodiments, as shown in FIG. 11 , along the first direction, the maximum distance L2 between the outer contours of the first pole 1213 a and the second pole 1213 b does not exceed 40% of the dimension L1 of the first wall 1211 a in the first direction.

[0132] By setting the maximum distance between the outer contours of the first pole 1213a and the second pole 1213b to no more than 40% of the full length of the first wall, the mutual coordination effect between the first pole 1213a and the second pole 1213b can be enhanced, which is more conducive to improving the strength of the pole configuration area in the first wall and reducing the risk of bending deformation.

[0133] In some embodiments, as shown in FIG12 , the distance L3 between the outer contours of the first pole 1213a and the second pole 1213b and the edge of the first wall 1211a in the first direction is not less than 5% of the dimension L1 of the first wall 1211a in the first direction.

[0134] By limiting the distance between the pole and the end edge in the length direction of the first wall, it is beneficial to improve the ease of assembly by virtue of the constraint effect of other wall surfaces at the end edge.

[0135] In some embodiments, as shown in FIG. 12 and FIG. 14 , the distance between the outer contours of the first pole 1213 a and the second pole 1213 b and the end edge of the first wall 1211 a in the first direction is in the range of 8.75 mm to 600 mm.

[0136] In the embodiment shown in FIG12 , the first direction coincides with the length direction of the first wall 1211a, and a distance L3 between the outer contours of the first and second poles 1213a, 1213b and the end edge of the first wall 1211a in the first direction is in a range of 8.75 mm to 600 mm. Alternatively, the distance L3 may be, for example, 8.75 mm, 9 mm, 10 mm, 50 mm, 100 mm, 200 mm, 300 mm, 400 mm, 500 mm, or 600 mm. In the embodiment shown in FIG14 , the first direction coincides with the width direction of the first wall 1211a, and a distance W3 between the outer contours of the first and second poles 1213a, 1213b and the end edge of the first wall 1211a in the first direction is in a range of 8.75 mm to 600 mm. Optionally, the distance W3 can be, for example, 8.75 mm, 9 mm, 10 mm, 50 mm, 100 mm, 200 mm, 300 mm, 400 mm, 500 mm, or 600 mm.

[0137] As a result, the electrode can be arranged at an appropriate position on the first wall, and the conductive function can be reliably exerted while reinforcing the first wall.

[0138] In some embodiments, as shown in FIG. 11 and FIG. 12 , a dimension L1 of the first wall 1211 a in the length direction a is greater than or equal to 350 mm.

[0139] Optionally, the dimension L1 of the first wall 1211 a in the length direction a may be in the range of 350 mm to 1200 mm.

[0140] Furthermore, the dimension L1 of the first wall 1211a in the length direction a can be in the range of 350 mm to 700 mm. In some embodiments, battery cells with lengths within this range are referred to as short-blade battery cells. Specifically, the length dimension can be 350 mm, 400 mm, 450 mm, 500 mm, 550 mm, 600 mm, 650 mm, or 700 mm.

[0141] Furthermore, the dimension L1 of the first wall 1211a in the length direction a can be in the range of 800 mm to 1200 mm. In some embodiments, battery cells with lengths within this range are referred to as long-blade battery cells. Specifically, the length dimension can be 800 mm, 850 mm, 900 mm, 1000 mm, 1100 mm, or 1200 mm.

[0142] Concentrating the first pole 1213a and the second pole 1213b is more conducive to improving the strength of the end cover of a battery with a longer length.

[0143] In some embodiments, as shown in FIG. 2 , FIG. 3 , FIG. 9 , and FIG. 11 to FIG. 13 , the first direction is consistent with the length direction a of the first wall 1211 a , and the first poles 1213 a and the second poles 1213 b are arranged spaced apart from each other along the length direction a.

[0144] Here, taking the first wall 1211a of the rectangular shell 1211 as an example, the length direction refers to the direction of the longest side among the three mutually perpendicular edges; the width direction refers to the direction perpendicular to the length direction in the plane where the pole is provided.

[0145] The first and second poles 1213a, 1213b are arranged with a spacing therebetween along the longitudinal direction a. The spacing has a lower limit that at least prevents electrical continuity between the first and second poles 1213a, 1213b. Alternatively, the spacing can be set to a minimum value based on considerations such as component installation space and operating space. The upper limit must ensure that the maximum distance between the outer contours of the first and second poles 1213a, 1213b is less than half the size of the first wall 1211a. This spacing can be set based on specific circumstances as long as the above requirements are met.

[0146] By arranging the first pole 1213a and the second pole 1213b at intervals along the length direction a within a certain distance range, it is more conducive to improving the strength of the pole configuration area in the first wall 1211a, and is conducive to further reducing the risk of deformation of the first wall. In detail, especially for long-blade batteries, along the length direction a of the first wall 1211a, the risk of deformation of the first wall 1211a (especially the electrode configuration area) is greater or the deformation amount is greater. By concentrating the first pole 1213a and the second pole 1213b along the length direction, it is conducive to reducing the risk of deformation of the pole configuration area; and more space can be reserved in the length direction of the first wall, which is conducive to fully utilizing the other space of the first wall.

[0147] In some embodiments, as shown in FIG. 4 , FIG. 7 , and FIG. 14 , the first direction may also be consistent with the width direction b of the first wall 1211 a , and the first poles 1213 a and the second poles 1213 b are arranged spaced apart from each other along the width direction b.

[0148] Regarding the size of this spacing, its lower limit is similarly such that the first pole 1213a and the second pole 1213b are at least electrically disconnected from each other. Alternatively, it can be set to a minimum spacing based on considerations such as component installation space and operating space. Its upper limit is such that the maximum distance between the outer contours of the first pole 1213a and the second pole 1213b is less than half the size of the first wall 1211a. As long as these requirements are met, the spacing can be set based on specific circumstances.

[0149] By arranging the first and second poles 1213a, 1213b along the width direction b, the strength of the pole arrangement area in the first wall 1211a can be increased, which helps reduce the risk of deformation of the first wall 1211a. In addition, by concentrating the first and second poles 1213a, 1213b along the width direction, the remaining space in the first wall 1211a can be fully utilized.

[0150] In some embodiments of the battery cell, the first terminal 1213a and the second terminal 1213b are both disposed on the same side of the first wall 1211a along the first direction, or the first terminal 1213a and the second terminal 1213b are both disposed near the middle of the first wall 1211a in the first direction. The first direction may coincide with the length direction of the first wall 1211a or the width direction.

[0151] In some embodiments, as shown in Figures 2, 3, 9, 11 to 13, the first direction is consistent with the length direction a of the first wall 1211a, and the first pole 1213a and the second pole 1213b are both arranged on the same side of the first direction of the first wall 1211a, or the first pole 1213a and the second pole 1213b are both arranged near the middle position of the first wall 1211a in the first direction.

[0152] As shown in FIG2 , the first pole 1213a and the second pole 1213b are both positioned near the middle of the first wall 1211a in the first direction. For example, the first pole 1213a and the second pole 1213b can be symmetrically positioned about the length centerline of the first wall 1211a (an imaginary line extending along the width direction b at the length center), or, although asymmetrical, the first pole 1213a and the second pole 1213b are positioned on either side of the length centerline. In the example shown in FIG2 , the areas on the first wall 1211a on either side of the first pole 1213a and the second pole 1213b along the length direction a can be used to arrange other components, such as an explosion-proof valve. Of course, the explosion-proof valve can also be positioned in the area between the first pole 1213a and the second pole 1213b, or the explosion-proof valve can be positioned on another wall instead of the first wall 1211a.

[0153] As shown in Figure 3, the first pole 1213a and the second pole 1213b are both arranged on one side of the first wall 1211a in the first direction. Exemplarily, the first pole 1213a and the second pole 1213b are both arranged near the end of the length direction a of the first wall 1211a, or the first pole 1213a and the second pole 1213b are both located on one side of the length centerline and arranged near the length centerline, or the first pole 1213a and the second pole 1213b are located between the end of the length direction a of the first wall 1211a and the aforementioned length centerline.

[0154] In the example shown in FIG3 , along the length direction a, the area on the first wall 1211a located on the other side of the first pole 1213a and the second pole 1213b (the non-pole arrangement area) can be used to arrange other components, for example, an explosion-proof valve. Of course, the explosion-proof valve can also be arranged in the area between the first pole 1213a and the second pole 1213b, or it can be arranged on other walls instead of the first wall 1211a.

[0155] By arranging both the first and second posts 1213a, 1213b on one side along the longitudinal direction a, the strength of the first wall 1211a is enhanced while facilitating the utilization of other areas within the first wall 1211a. Furthermore, the posts can be aligned with other wall surfaces at the edges, improving assembly ease. By arranging the first and second posts 1213a, 1213b near the middle along the longitudinal direction a, the middle region, where deformation is more likely, can be reinforced, thereby evenly improving the overall strength of the first wall 1211a.

[0156] In some embodiments, as shown in Figures 5 to 8 and 10, the first wall 1211a has a boss 1214, which protrudes away from the first wall 1211a relative to the first wall 1211a, and at least either the first pole 1213a or the second pole 1213b is disposed on the boss 1214.

[0157] A boss 1214 is provided on the surface of the first wall 1211a exposed from the housing 1211, and the boss 1214 is arranged to protrude relative to the first wall 1211a. The boss 1214 can be the same width as the first wall 1211a, that is, have the same or substantially the same size in the width direction b; the boss 1214 can also be narrower than the width of the first wall 1211a. Regarding the size of the outline of the boss 1214, as long as the boss 1214 can support the pole, there is no special restriction on its outline size. For example, when observing the pole and the boss 1214 from above along the thickness direction of the first wall 1211a, the outline of the pole can exceed the outline of the boss 1214, and the outline of the boss 1214 can also exceed the outline of the pole. From the perspective of a good reinforcement effect on the first wall 1211a, the outline of the boss 1214 can be made to exceed the outline of the pole.

[0158] The shape of boss 1214 is not particularly limited and can be the same or substantially the same as the terminal, or it can be a different shape from the terminal. In the examples shown in Figures 5, 6, and 7, the shape of boss 1214 is different from that of the terminal. Furthermore, boss 1214 extends along the length of first wall 1211a to form a long, strip-like shape.

[0159] The boss 1214 is connected to the first wall 1211a by welding, for example. The boss 1214 can be made of metal or non-metal.

[0160] The pole is provided on the boss 1214. Specifically, the pole passes through the boss 1214 and is exposed on the side of the boss 1214 away from the first wall 1211a. Although not shown, the boss 1214 has a through hole for connecting the pole and the tab 1217.

[0161] The first pole 1213a and the second pole 1213b may both be disposed on the boss 1214, or only one of them may be disposed on the boss 1214. In the embodiment of the present disclosure, the first pole 1213a and the second pole 1213b are both disposed on the boss as an example for description.

[0162] It should be noted that in the embodiment with the boss 1214, the first pole 1213a and the second pole 1213b are still arranged along the first direction, and along the first direction, the maximum distance between the outer contours of the first pole 1213a and the second pole 1213b is less than half the size of the first wall 1211a.

[0163] By providing the boss 1214 for the pole, the strength of the first wall can be further improved through the boss, and the risk or amount of deformation can be reduced.

[0164] 5 , 6 and 8 , there is one boss 1214 , which is disposed on one side of the first wall 1211 a in the first direction, or in the middle of the first wall in the first direction.

[0165] Similar to the arrangement of the first pole 1213a and the second pole 1213b, as shown in FIG6 , the boss 1214 is arranged in the middle position of the first wall 1211a in the first direction, where the first direction is consistent with the length direction a of the first wall 1211a. For example, the boss 1214 can be symmetrically arranged about the length centerline of the first wall 1211a (an imaginary line extending along the width direction b at the length center), or, although asymmetrical, the boss 1214 is located on both sides of the length centerline. In the example shown in FIG6 , the area along the length direction a where the boss 1214 is not arranged can be used to arrange other components, for example, an explosion-proof valve can be arranged. Of course, the explosion-proof valve can also be arranged on the boss 1214, and the explosion-proof valve can also be arranged on other walls instead of on the first wall 1211a.

[0166] As shown in FIG5 , the boss 1214 is disposed on one side of the first wall 1211a in a first direction, where the first direction coincides with the length direction a of the first wall 1211a. For example, the boss 1214 is disposed near an end of the first wall 1211a in the length direction a, or is located on one side of and near a centerline of the length, or is located between the end of the first wall 1211a in the length direction a and the aforementioned centerline.

[0167] Either the first pole 1213 a or the second pole 1213 b may be disposed on the boss 1214 , with the other directly disposed on the first wall 1211 a ; alternatively, both the first pole 1213 a and the second pole 1213 b may be disposed on the boss 1214 .

[0168] By arranging the first pole 1213 a and / or the second pole 1213 b on one boss 1214 , the strength of the first wall 1211 a can be further improved through the cooperation between the boss 1214 and the pole in the length direction.

[0169] As shown in FIG8 , there is one boss 1214. The boss 1214 is provided on one side of the first wall 1211a in the first direction (not shown in FIG7 ), or the boss 1214 is provided in the middle position of the first wall in the first direction, where the first direction coincides with the width direction b of the housing 1211.

[0170] In some embodiments, as shown in FIG. 5 and FIG. 6 , the first pole 1213 a and the second pole 1213 b are arranged on the boss 1214 at intervals along the length direction of the first wall 1211 a .

[0171] 5 and 6 , the first pole 1213a and the second pole 1213b are respectively provided at the two ends of the boss 1214. In some embodiments, the boss 1214 may be formed longer, that is, the first pole 1213a and the second pole 1213b may be arranged at a certain distance from the two ends of the boss 1214.

[0172] By arranging the first pole 1213a and the second pole 1213b on the same boss 1214 along the length direction a, the strength of the first wall is further improved.

[0173] In some embodiments, as shown in FIG. 7 and FIG. 10 , there are two bosses 1214 , one of which is provided with a first pole 1213 a , and the other boss 1214 is provided with a second pole 1213 b , and the two bosses 1214 are arranged along the first direction.

[0174] The first direction may coincide with the length direction a of the first wall 1211a or the width direction b. In an embodiment having two bosses 1214, the maximum distance between the outer contours of the first pole 1213a and the second pole 1213b provided on each boss 1214 along the length direction a of the housing 1211 (first wall 1211a) or along the width direction b of the housing 1211 (first wall 1211a) is less than half the total length of the first wall 1211a.

[0175] In some embodiments, along the length direction a of the shell 1211, the maximum distance between the outer contours of the two bosses 1214 may be less than half the total length of the first wall 1211a; in other embodiments, along the length direction a of the shell 1211, the maximum distance between the outer contours of the two bosses 1214 may be greater than or equal to half the total length of the first wall 1211a.

[0176] By arranging the first pole 1213 a and the second pole 1213 b on the two bosses 1214 respectively, it is beneficial to improve the degree of freedom of arrangement of the bosses 1214 and to reduce the space occupied by the bosses 1214 .

[0177] In some embodiments, as shown in FIG. 7 and FIG. 10 , the two bosses 1214 are spaced apart from each other near the middle of the first wall 1211 a , or the two bosses 1214 are disposed on the same side of the first wall 1211 a in the first direction.

[0178] The first direction may be consistent with the length direction a of the first wall 1211a, or may be consistent with the width direction b. For example, the two bosses 1214 are arranged at intervals along the length direction a of the housing 1211. In some embodiments, the two bosses 1214 may be symmetrically arranged about the length centerline of the first wall 1211a (an imaginary line extending along the width direction b at the length center), or, although asymmetrical, the two bosses 1214 are arranged on both sides of the length centerline. In other embodiments, both bosses 1214 are located on one side of the length centerline, and for example, may be located near one end of the length direction a of the first wall 1211a.

[0179] The two bosses 1214 and the posts provided on the bosses 1214 can enhance the strength of the first wall 1211 a of the battery.

[0180] In some embodiments, the projected area of ​​the boss 1214 projected onto the first wall 1211 a along the thickness direction c of the first wall 1211 a accounts for 10% to 30% of the area of ​​the first wall.

[0181] By providing the boss 1214 of an appropriate size, it is possible to provide the pole, improve the strength of the first wall, and reduce the occupied space.

[0182] In some embodiments, as shown in Figure 6, the dimension L6 of the boss 1214 in the second direction does not exceed 500 mm, wherein, in the plane where the first wall 1211a is located, the second direction is perpendicular to the first direction; and / or, as shown in Figure 13, the height dimension L7 of the boss 1214 protruding relative to the first wall 1211a does not exceed 300 mm.

[0183] For example, the first direction coincides with the length direction a of the first wall 1211a, and the second direction coincides with the width direction b of the first wall 1211a. The dimension L6 of the boss 1214 in the second direction can be 50 mm, 100 mm, 200 mm, 300 mm, 400 mm, or 500 mm. The height dimension L7 of the boss 1214 protruding from the first wall 1211a can be 20 mm, 50 mm, 100 mm, 150 mm, 200 mm, or 300 mm.

[0184] By providing the boss 1214 of an appropriate size, it is possible to provide the pole, improve the strength of the first wall, and reduce the occupied space.

[0185] In some embodiments, as shown in FIG. 6 , a dimension L6 of the boss 1214 in the second direction ranges from 100 mm to 400 mm; and / or a height dimension L7 of the boss 1214 ranges from 20 mm to 100 mm.

[0186] By providing the boss 1214 of an appropriate size, it is possible to provide the pole, improve the strength of the first wall, and reduce the occupied space.

[0187] In some embodiments, as shown in Figures 9 and 10, first wall 1211a is the end cap of the battery cell. In other embodiments, as shown in Figure 14, first wall 1211a is the wall with the largest area in the housing 1211. In other embodiments, as shown in Figure 3, first wall 1211a is the wall of the housing 1211 that faces the end cap.

[0188] This allows the terminals to be arranged with greater positional freedom in the battery case 1211. Even if there is a risk that the wall of the case 1211 where the terminals are to be arranged will be subject to significant deformation, the concentrated arrangement of the terminals can reduce this deformation.

[0189] A second aspect of the present disclosure provides a battery.

[0190] Figure 15 is a schematic diagram of an exploded three-dimensional view of a battery provided in one embodiment of the present disclosure; Figure 16 is a schematic diagram of a partial structure in the battery shown in Figure 15; Figure 17 is a schematic diagram of a three-dimensional view of a battery provided in another embodiment of the present disclosure; Figure 18 is a schematic diagram of the AA cross-sectional view in Figure 17; Figure 19 is an enlarged schematic diagram of part B in Figure 18; Figure 20 is a schematic diagram of an exploded three-dimensional view of a battery provided in yet another embodiment of the present disclosure.

[0191] In some embodiments, as shown in FIG. 15 to FIG. 20 , the battery 10 includes a housing 11 and a plurality of battery cells 121 .

[0192] As shown in Figure 15, a box accommodating cavity 111a for accommodating battery cells 121 and other components is formed inside the box 11. A plurality of battery cells 121 are arranged into a battery cell row and accommodated in the box accommodating cavity 111a. A box wall 111 of the box 11 closes the box accommodating cavity 111a. Sometimes, the box wall 111 is implemented by a cover plate. In some embodiments, a heat exchange plate 14 is provided between the box wall 111 and the battery cell row. The heat exchange plate 14 can be bonded to the battery cell 121 and / or the surface of the box wall 111 facing the battery cell 121. In a specific embodiment, the heat exchange plate 14 is bonded to the surface of the box wall 111 facing the battery cell 121 through a first adhesive layer 15, and is bonded to the surface of the battery cell 121 (first wall 1211a) through a second adhesive layer 16.

[0193] In some embodiments, as shown in Figures 15 and 16 , multiple battery cells 121 in the housing accommodating cavity 111a of the battery 10 are electrically connected to each other via a busbar 122. Specifically, the busbar 122 electrically connects the first electrode 1213a of one battery cell 121 with the second electrode 1213b of another battery cell 121, and the two battery cells 121 may be adjacent to each other.

[0194] In addition, a sampling structure and an electrical kit 123 are also provided in the housing cavity 111 a of the battery 10 .

[0195] This can provide a battery in which the outer shell 1211 of the battery cell 121 is not easily deformed or has a small deformation amount.

[0196] In some embodiments, as shown in Figures 15 and 16, the first direction is consistent with the length direction a of the battery cell, and multiple battery cells 121 are arranged along the width direction b of the first wall 1211a, so that the first pole 1213a and the second pole 1213b are respectively arranged along the width direction b of the first wall.

[0197] In some embodiments, the first and second poles 1213a, 1213b are electrically connected via a busbar 122. The present disclosure does not particularly limit the shape of the busbar 122, as long as it can electrically connect the first and second poles 1213a, 1213b. In FIG16 , as an example, the busbar 122 is configured in a relatively small plate shape.

[0198] This makes it possible to easily group the battery cells and easily connect the first electrode 1213 a and the second electrode 1213 b .

[0199] In some embodiments, as shown in Figures 17 to 19, the housing 11 includes a wall 111 facing the first wall 1211a of the battery cell 121. A receiving portion 111b is formed on one side of the wall 111 facing the first wall 1211a of the battery cell 121 (direction x2 in Figure 17). The battery 10 also includes a busbar 122 and an electrical assembly 123. The busbar 122 is used to connect one of the first and second poles 1213a, 1213b in one battery cell 121 to one of the first and second poles 1213a, 1213b in another battery cell 121. The electrical assembly 123 includes at least one of a sampling structure, a battery management system, a relay, and a high-voltage distribution unit. The receiving portion 111b accommodates at least a portion of the first and second poles 1213a, 1213b, the busbar 122, and the electrical assembly 123.

[0200] As shown in Figures 17 to 19, a current collector 122 is connected above the first and second poles 1213a, 1213b (not shown), and a sampling structure is disposed above the current collector 122. In some embodiments, an electrical kit 123 may also be provided. A protrusion 1111 may be located above the first and second poles 1213a, 1213b (not shown), with a portion of the sampling structure extending upward into the receiving portion 111b. The receiving portion 111b may be the space between the first wall 1211a of the battery cell 121 and the box wall 111.

[0201] Therefore, by forming a accommodating portion 111b between the box wall 111 of the battery facing the first wall and the first wall of the battery cell, and accommodating the pole, the busbar 122, the electrical kit 123, etc. in whole or in part in the accommodating portion 111b, it is beneficial to suppress the overall volume of the battery box 11 and improve the overall volume utilization of the battery box 11.

[0202] In some battery embodiments, a protrusion 1111 is provided on the box wall 111 facing the first wall 1211a. The protrusion 1111 protrudes from the box wall 111 in a direction away from the battery cell 121 (direction x1 in FIG. 17 ), and the accommodating portion 111b includes the space on one side of the protrusion 111 facing the first wall 1211a (direction x2 in FIG. 17 ).

[0203] Therefore, by setting a protrusion 1111 on the case 11 of the battery 10 to form a accommodating portion 111b, and accommodating the pole, the busbar 122, the electrical kit 123, etc. in the accommodating portion 111b, it is beneficial to suppress the overall volume of the battery case 11 and improve the overall volume utilization of the battery case 11.

[0204] In addition, since the first poles 1213 a and the second poles 1213 b are arranged in a concentrated manner, it is beneficial to suppress the width of the protrusion 1111 in the Z direction.

[0205] In some embodiments, as shown in Figures 15 to 19, the battery 10 further includes a heat exchange assembly disposed on the first wall 1211 of each battery cell 121 for exchanging heat with the battery cell 121. Along the thickness direction c of the first wall 1211a, the projections of the first and second poles 1213a, 1213b on the first wall 1211a do not overlap with the projection of the heat exchange assembly on the first wall 1211a.

[0206] The heat exchange assembly is used to exchange heat with the battery cells 121, providing heating and / or cooling. In some embodiments, the heat exchange assembly includes a heat exchange plate 14 having a flow channel for the heat exchange medium. The flow channel has an inlet and an outlet, each of which is connected to a heat exchange medium pipeline. This disclosure does not specifically limit the heat exchange assembly; existing heat exchange assemblies of appropriate size may be used. Examples of the heat exchange medium include water, ethylene glycol, and the like.

[0207] Thus, heat exchange can be achieved by utilizing the area outside the pole arrangement area on the first wall 1211 a of the battery cell, which is beneficial for reducing the overall volume of the battery case 11 and improving the volume utilization rate within the battery case 11 .

[0208] In some embodiments, as shown in Figures 15 and 16, the first walls 1211a of multiple battery cells 121 form a first surface 120, the first surface 120 has a first area 120a and a second area 120b, the first pole 1213a and the second pole 1213b are arranged in the first area 120a, the heat exchange component is arranged in the second area 120b, the number of second areas 120b is two, and the two second areas 120b are respectively located on both sides of the first area 120a.

[0209] The battery cells 121 can be arranged so that the first pole 1213a and the second pole 1213b are concentrated in the first area 120a. By arranging heat exchange components on both sides of the first area 120a, heat exchange with the battery cell 121 as a whole is facilitated, and the strength of the first wall 1211a of the battery cell 121 is further improved.

[0210] In some embodiments, as shown in Figures 15 and 16, the first pole 1213a and the second pole 1213b are set in the middle position on the length direction a of the battery cell 121, and a plurality of such battery cells 121 are arranged along the width direction b of the battery cell 121, so that the first pole 1213a and the second pole 1213b can be concentrated in the first area 120a.

[0211] In other embodiments, as shown in Figures 3 and 5, the first and second electrodes 1213a, 1213b may be disposed on one side of the battery cell 121 in the longitudinal direction. Two battery cells 121 may be arranged along the longitudinal direction a of the battery cell 121 with the sides forming the first and second electrodes 1213a, 1213b close to or in contact with each other, thereby forming a battery cell unit along the longitudinal direction a. This battery cell unit is then arranged along the width direction b of the battery cell 121, as shown in Figure 20. In this manner, the first and second electrodes 1213a, 1213b may be concentrated in the first region 120a.

[0212] The arranged battery cells 121 may be close to, in contact with, or bonded to each other.

[0213] In some embodiments, the first walls 1211a of multiple battery cells 121 form a first surface 120, the first surface 120 has a first area 120a and a second area 120b, the first pole 1213a and the second pole 1213b are arranged in the first area 120a, the heat exchange component is arranged in the second area 120b, the number of first areas 120a is two, and the second area 120b is located between the two first areas 120a.

[0214] As shown in Figures 3 and 5, the first and second electrodes 1213a, 1213b can be positioned on one side of the lengthwise direction of the battery cell 121. The two battery cells 121 are arranged along the lengthwise direction a of the battery cell 121, with the sides where the first and second electrodes 1213a, 1213b are formed being spaced apart (with the sides where no electrodes are formed being close to or in contact with each other). This forms a battery cell unit along the lengthwise direction a, and the battery cell unit is arranged along the widthwise direction b of the battery cell 121. This creates an arrangement in which the electrodes are positioned on both sides of the first surface 120. This creates a larger region where no electrodes are formed, namely the second region 120b, in which the heat exchange assembly can be arranged.

[0215] The battery cells 121 can be arranged so that the first pole 1213a and the second pole 1213b are concentrated on both sides of the second area 120b. By arranging the heat exchange component in the second area 120b between the two first areas 120a where the poles are set, heat exchange with the battery cell is facilitated, and the strength of the first wall of the battery cell is also improved.

[0216] In some embodiments, the area of ​​the second region 120b is greater than the area of ​​the first region 120a. Because the maximum distance between the outer contours of the first and second poles 1213a, 1213b in the length direction a is less than 50% of the total length of the first wall 1211a of the battery cell, the area of ​​the first region 120a occupied by the poles is smaller than the area of ​​the second region 120b where no poles are formed.

[0217] By configuring the first pole 1213a and the second pole 1213b and arranging the battery cells, the second region 120b where no pole is provided can have a larger area, thereby facilitating providing a larger configuration space for the heat exchange component.

[0218] In some embodiments, the heat exchange assembly includes a heat exchange plate 14 and an adhesive layer. The adhesive layer is arranged on the side of the heat exchange plate 14 close to the first wall 1211a, and the heat exchange plate 14 is bonded to the first wall 1211a of the battery cell 121 through the adhesive layer. Alternatively, it is arranged on the side of the heat exchange plate 14 away from the first wall 1211a, and the heat exchange plate 14 is bonded to the box wall 111 through the adhesive layer.

[0219] As shown in Figures 15, 18, and 19, in some embodiments, a heat exchange plate 14 is provided between the box wall 111 and the battery cell row. The heat exchange plate 14 can be bonded to the battery cell 121 and / or the surface of the box wall 111 facing the battery cell 121. In a specific embodiment, the heat exchange plate 14 is bonded to the surface of the box wall 111 facing the battery cell 121 via a first adhesive layer 15 and to the surface of the battery cell 121 (the first wall 1211a) via a second adhesive layer 16. In other embodiments, the heat exchange plate 14 is bonded to the surface of the box wall 111 facing the battery cell 121 via the first adhesive layer 15, or to the surface of the battery cell 121 (the first wall 1211a) via the second adhesive layer 16.

[0220] Since the heat exchange assembly is bonded to the first wall 1211 a of the battery cell 121 , it is beneficial to improve the strength of the first wall 1211 a of the battery cell 121 and further reduce the risk or amount of deformation.

[0221] In some embodiments, as shown in FIG19 , the distance L5 between the top ends of the first pole 1213a and the second pole 1213b along the thickness direction c of the first wall 1211a and the first wall 1211a is not less than the height of the heat exchange assembly along the thickness direction of the first wall 1211a.

[0222] Since the heat exchange assembly does not extend beyond the pole along the thickness direction of the first wall 1211 a , it is beneficial to suppress the overall volume of the battery and improve the volume utilization of the battery.

[0223] In some embodiments, as shown in Figures 18 and 19, a through hole 1113 is provided in the box wall 111 of the first wall 1211a of the box body 11 facing the battery cell 121. The box wall 111 with the through hole 1113 is used as the first box wall. Along the thickness direction of the first box wall, the projections of the first pole 1213a and the second pole 1213b on the first box wall at least partially fall within the range of the through hole 1113.

[0224] In some embodiments, the through hole 1113 is formed so that the projections of the first pole 1213a and the second pole 1213b on the first box wall partially fall within the range of the through hole 1113. In other embodiments, the through hole 1113 is formed so that the projections of the first pole 1213a and the second pole 1213b on the first box wall completely fall within the range of the through hole 1113.

[0225] Since the first pole 1213a and the second pole 1213b are centrally arranged, the through hole 1113 provided in the first box wall allows for easy inspection, maintenance, and other operations on the first pole 1213a and the second pole 1213b. The central arrangement of the first pole 1213a and the second pole 1213b helps to reduce the size of the through hole 1113.

[0226] In some embodiments, as shown in Figures 18 and 19, the first box wall is provided with a protrusion 1111 protruding in a direction away from the battery cell 121, and the through hole 1113 is opened in the protrusion 1111. The protrusion 1111 is formed integrally with the first box wall, or the protrusion 1111 is formed detachably relative to the first box wall.

[0227] The protrusion 1111 can be formed integrally by partially standing up the first box wall; it can also be formed by connecting an annular vertical plate around the through hole 1113 opened in the first box wall. The connection method can be welding or detachable snap-on connection.

[0228] The length of the protrusion 1111 in the longitudinal direction is not greater than 500 mm. Alternatively, it can be selected within the range of 50 mm to 300 mm. For example, the length can be 50 mm, 100 mm, 150 mm, 200 mm, 250 mm, 300 mm, 350 mm, 400 mm, 450 mm, or 500 mm.

[0229] Since the first box wall is provided with a protrusion 1111 and the through hole 1113 is provided in the protrusion 1111 , the first pole 1213 a , the second pole 1213 b and other components extending into the protrusion 1111 can be observed and maintained through the through hole 1113 .

[0230] In some embodiments, the battery further includes a closing cover 1112 for closing the through hole 1113 .

[0231] The closing cover 1112 is, for example, configured in a flat plate shape, and is connected to the protruding portion 1111 by hinged connection, snap connection, etc. so as to open and close relative to the through hole 1113 .

[0232] 19 , the through hole 1113 is formed in the protruding portion 1111 . In the case where the protruding portion 1111 is not provided and the through hole is formed in the box wall 111 , the through hole 1113 refers to a through hole formed in the flat box wall 111 .

[0233] Thus, when the through hole 1113 is not in use, it can be closed with the closing cover 1112 to prevent foreign matter from entering the battery case 11 .

[0234] In some embodiments, the battery further includes a busbar 122 and an electrical kit 123, the busbar 122 being used to connect one of the first pole 1213a and the second pole 1213b in one battery cell 121 to one of the first pole 1213a and the second pole 1213b in another battery cell 121, and the electrical kit 123 including at least one of a sampling structure, a battery management system, a relay, and a high-voltage distribution unit; along the thickness direction of the first box wall, the projections of the busbar 122 and the electrical kit 123 on the first box wall at least partially fall within the range of the through hole 1113.

[0235] By providing a protrusion 1111 on the battery case 11 to form a receiving portion 111b, and accommodating the pole, busbar 122, electrical kit 123, etc. in the receiving portion 111b, it is not only beneficial to suppress the overall volume of the battery case 11, but also beneficial to improve the overall volume utilization of the battery case 11, and also beneficial to observe, maintain, and perform other operations on more components through the through hole 1113.

[0236] A third aspect of the present disclosure provides an electrical device, which includes a plurality of battery cells 121 provided in the first aspect or the battery 10 provided in the second aspect, and the battery cells 121 or the battery 10 serve as a power source for the electrical device.

[0237] Thus, it is possible to provide an electrical device equipped with a battery cell 121 in which the housing 1211 is not easily deformed or has a small deformation, thereby reducing maintenance time.

[0238] FIG21 is a schematic diagram of a seat and a battery in a vehicle according to an embodiment of the present disclosure. As shown in FIG1 and FIG21 , in some embodiments, the electrical device includes a vehicle 100 .

[0239] In some embodiments, battery 10 is mounted on the lower portion of vehicle 100. As shown in FIG21 , seats 20 are provided in the passenger compartment of vehicle 100, and battery 10 is mounted below these seats 20. In some embodiments, a vehicle floor panel is provided between battery 10 and seats 20. In other embodiments, seats 20 are mounted directly on battery 10.

[0240] As a result, a vehicle equipped with a battery in which the housing 1211 of the battery cell 121 is less likely to deform or has a small deformation amount can be provided, which is advantageous in reducing maintenance time.

[0241] A fourth aspect of the present disclosure provides an energy storage device.

[0242] Figure 22 is a schematic diagram of the structure of an energy storage device provided in one embodiment of the present disclosure. As shown in Figure 22, the energy storage device includes a plurality of battery cells 121 provided in the first aspect above, or the battery 10 provided in the second aspect above, and the battery cells 121 or the battery 10 are configured to store and provide electrical energy.

[0243] In some embodiments, as shown in FIG. 11 , the energy storage device 200 includes a bracket 201 , and the battery 10 is placed on the bracket 201 .

[0244] Thus, it is possible to provide an energy storage device 200 equipped with a battery cell 121 in which the housing 1211 is not easily deformed or has a small deformation, thereby reducing maintenance time.

[0245] The various embodiments / implementations provided in the present disclosure can be combined with each other without causing any contradiction.

[0246] The foregoing description is merely a preferred embodiment of the present disclosure and is not intended to limit the present disclosure. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present disclosure shall be included within the scope of protection of the present disclosure. Industrial Applicability

[0247] The present disclosure provides a battery cell, a battery, an electrical device, and an energy storage device that can improve the strength of a battery casing. In the battery cell, since the first pole and the second pole are both arranged on the first wall and the maximum distance between the outer contours of the first pole and the second pole is less than half the size of the first wall, the first pole and the second pole are centrally arranged relative to the entire first wall. Therefore, through the mutual cooperation of the two pole structures, the strength of the pole arrangement area in the first wall and even the entire first wall can be improved, which is conducive to reducing the risk of deformation of the first wall. In addition, by centrally arranging the first pole and the second pole, it is conducive to fully utilizing the other space of the first wall, and it is also conducive to the centralized processing of the poles and their attached parts during processing and maintenance.

Claims

1. A battery cell, wherein: include: a housing having a first wall; A first pole and a second pole are provided on the first wall, Wherein, the first pole and the second pole are arranged along a first direction, Along the first direction, the maximum distance between outer contours of the first pole and the second pole is less than half of a dimension of the first wall.

2. The battery cell according to claim 1, wherein: Along the first direction, the maximum distance between the outer contours of the first pole and the second pole does not exceed 40% of the dimension of the first wall.

3. The battery cell according to claim 1 or 2, wherein: The first direction is consistent with the length direction of the first wall, The first pole and the second pole are arranged at intervals from each other along the length direction.

4. The battery cell according to claim 1 or 2, wherein: The first direction is consistent with the width direction of the first wall, The first poles and the second poles are arranged at intervals from each other along the width direction.

5. The battery cell according to any one of claims 1 to 4, wherein: The first pole and the second pole are both arranged on the same side of the first wall along the first direction, or, The first pole and the second pole are both arranged close to a middle position of the first wall in the first direction.

6. The battery cell according to any one of claims 1 to 5, wherein: The first wall has a boss, and the boss is protruded relative to the first wall in a direction away from the first wall. At least one of the first pole and the second pole is provided on the boss.

7. The battery cell according to claim 6, wherein: The number of the boss is one; The boss is provided on one side of the first wall in the first direction, or, The boss is arranged at a middle position of the first wall in the first direction.

8. The battery cell according to claim 6, wherein: There are two bosses, one of which is provided with the first pole, and the other is provided with the second pole, and the two bosses are arranged along the first direction.

9. The battery cell according to claim 8, wherein: The two bosses are spaced apart from each other near the middle of the first wall, or, The two bosses are arranged on the same side of the first wall along the first direction.

10. The battery cell according to any one of claims 6 to 9, wherein: A projected area of ​​the boss projected onto the first wall along a thickness direction of the first wall accounts for 10% to 30% of an area of ​​the first wall.

11. The battery cell according to any one of claims 6 to 10, wherein: The dimension of the boss in the second direction does not exceed 500 mm, wherein, in the plane where the first wall is located, the second direction is perpendicular to the first direction; And / or, the height dimension of the boss protruding relative to the first wall does not exceed 300 mm.

12. The battery cell according to claim 11, wherein: The size of the boss in the second direction ranges from 100 mm to 400 mm; And / or, the height dimension of the boss ranges from 20 mm to 100 mm.

13. The battery cell according to any one of claims 1 to 12, wherein: The length of the first wall is greater than or equal to 350 mm.

14. The battery cell according to any one of claims 1 to 13, wherein: A distance between the outer contours of the first pole and the second pole and an end edge of the first wall in the first direction is not less than 5% of the dimension of the first wall in the first direction.

15. The battery cell according to any one of claims 1 to 14, wherein: A distance between the outer contours of the first pole and the second pole and an end edge of the first wall in the first direction is in a range of 8.75 mm to 600 mm.

16. The battery cell according to any one of claims 1 to 15, wherein: The first wall is an end cover of the battery cell; or The first wall is the wall with the largest area in the housing; or, The first wall is a wall of the housing opposite to the end cover.

17. A battery, wherein: include: Box, A plurality of battery cells according to any one of claims 1 to 16.

18. The battery according to claim 17, wherein The first direction is consistent with the length direction of the battery cell, The plurality of battery cells are arranged along the width direction of the first wall, so that the first pole and the second pole are respectively arranged along the width direction of the first wall.

19. The battery according to claim 17 or 18, wherein The box body includes a box wall facing the first wall, and a receiving portion is formed on one side of the box wall facing the first wall. The battery also includes a busbar and an electrical kit, The busbar is used to connect one of the first pole and the second pole in one of the battery cells to one of the first pole and the second pole in another of the battery cells. The electrical kit includes at least one of a sampling structure, a battery management system, a relay, and a high-voltage power distribution unit; The accommodating portion accommodates at least part of the first pole, the second pole, the busbar, and the electrical kit.

20. The battery according to claim 19, wherein A protrusion is provided on the box wall facing the first wall. The protrusion protrudes from the box wall in a direction away from the first wall. The accommodating portion includes a space on a side of the protrusion facing the first wall.

21. The battery according to any one of claims 17 to 20, wherein The battery further includes a heat exchange component, which is disposed on the first wall of each battery cell and is used to exchange heat with each battery cell. Along the thickness direction of the first wall, the projections of the first pole and the second pole on the first wall do not overlap with the projection of the heat exchange component on the first wall.

22. The battery according to claim 21, wherein The first walls of the plurality of battery cells form a first surface, The first surface has a first area and a second area, the first pole and the second pole are arranged in the first area, and the heat exchange component is arranged in the second area. There are two second areas, and the two second areas are located on both sides of the first area respectively.

23. The battery according to claim 21, wherein The first walls of the plurality of battery cells form a first surface, The first surface has a first area and a second area, the first pole and the second pole are arranged in the first area, and the heat exchange component is arranged in the second area. The number of the first regions is two, and the second region is located between the two first regions.

24. The battery according to claim 22 or 23, wherein The area of ​​the second region is larger than that of the first region.

25. The battery according to any one of claims 21 to 24, wherein The heat exchange component comprises: heat exchange plates; and The adhesive layer is provided on a side of the heat exchange plate close to the first wall, and the heat exchange plate is bonded to the first wall of the battery cell through the adhesive layer, and / or is provided on a side of the heat exchange plate away from the first wall, and the heat exchange plate is bonded to the box wall through the adhesive layer.

26. The battery according to any one of claims 21 to 25, wherein The distance between the top ends of the first pole and the second pole in the thickness direction of the first wall and the first wall is not less than the height of the heat exchange assembly in the thickness direction of the first wall.

27. The battery according to any one of claims 17 to 26, wherein A through hole is provided on the box wall of the box body facing the first wall of the battery cell. The box wall with the through hole is used as a first box wall. Along the thickness direction of the first box wall, the projections of the first pole and the second pole on the first box wall at least partially fall within the range of the through hole.

28. The battery according to claim 27, wherein The first box wall is provided with a protrusion protruding in a direction away from the battery cell, and the through hole is opened in the protrusion. The protrusion is formed integrally with the first box wall, or the protrusion is formed detachably relative to the first box wall.

29. The battery according to claim 27 or 28, wherein The battery further includes a closing cover for closing the through hole.

30. The battery according to any one of claims 27 to 29, wherein The battery also includes a busbar and an electrical kit, The busbar is used to connect one of the first pole and the second pole in one of the battery cells to one of the first pole and the second pole in another of the battery cells. The electrical kit includes at least one of a sampling structure, a battery management system, a relay, and a high-voltage power distribution unit; Along the thickness direction of the first box wall, projections of the busbar and the electrical assembly on the first box wall at least partially fall within the range of the through hole.

31. An electrical device, wherein: The electric device includes a plurality of battery cells according to any one of claims 1 to 16 or a battery according to any one of claims 17 to 30, and the battery cells or the battery serve as a power source for the vehicle.

32. The electrical device according to claim 31, wherein: Including vehicles.

33. An energy storage device, wherein: The energy storage device includes a plurality of battery cells according to any one of claims 1 to 16 or a battery according to any one of claims 17 to 30, and the battery cells or the battery are configured to store and provide electrical energy.

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