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

Abstract

The utility model discloses a single battery, a battery, a power utilization device and an energy storage device, and the single battery comprises a housing which is provided with a first wall; the first terminal post and the second terminal post are arranged on the first wall, the first terminal post and the second terminal post are arranged in the first direction, and the farthest distance between the outer contours of the first terminal post and the second terminal post is smaller than one half of the size of the first wall in the first direction. The shell of the battery monomer has relatively high strength, and is not easy to deform or relatively small in deformation quantity. According to the battery, the power utilization device and the energy storage device, due to the adoption of the battery monomer, the maintenance time is favorably reduced.

Description

Technical Field

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

[0002] With the promotion and popularization of the concept of green development, 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 the field of energy storage.

[0003] In order to cope with various battery grouping scenarios, there are various shapes of battery cells in the industry, such as cylindrical battery cells, square shell battery cells, and blade-shaped battery cells. For blade-shaped battery cells, especially those with longer lengths, their ability to resist deformation is relatively poor. Therefore, how to improve the strength of longer battery cells, especially the strength of long blade-shaped battery cells (also called long blade battery cells) is one of the research directions in the industry. Utility Model Content

[0004] In order to solve the above technical problems, the present application provides a battery cell, a battery, an electrical device and an energy storage device, which can improve the strength of the battery casing.

[0005] In a first aspect, the present application 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 longest distance between the outer contours of the first pole and the second pole is less than half of the size of the first wall.

[0006] 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 of the size of the first wall, the first pole and the second pole are centrally arranged relative to the entire first wall, thereby improving the strength of the pole arrangement area in the first wall through the mutual cooperation of the two pole structures, which is conducive to reducing the risk of deformation of the pole arrangement area. In addition, by centrally arranging the first pole and the second pole, it is conducive to making full use of other spaces of the first wall, and is also conducive to centralized processing of the poles and their attached parts during processing and maintenance.

[0007] In the battery cell of some embodiments, along the first direction, the longest distance between the outer contours of the first pole and the second pole does not exceed 40% of the dimension of the first wall.

[0008] 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 effect 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.

[0009] 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.

[0010] 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.

[0011] 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.

[0012] By arranging the first pole and the second pole along the width direction, 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. In addition, by concentrating the first pole and the second pole along the width direction, it is more conducive to fully utilizing other spaces of the first wall.

[0013] In the battery cell of some embodiments, the first pole and the second pole are both disposed on the same side of the first wall along the first direction, or the first pole and the second pole are both disposed near the middle position of the first wall in the first direction.

[0014] By arranging the first pole and the second pole on the same side in the length direction or the width direction, it is possible to improve the strength of the pole arrangement area in the first wall while facilitating the utilization of other areas in the first wall; moreover, it can cooperate with other wall surfaces at the edge to improve the ease of assembly. In particular, by arranging the first pole and the second pole close to the middle position in the length direction, it is possible to strengthen the middle area with a greater possibility of deformation, and it is conducive to evenly improving the strength of the first wall as a whole.

[0015] In the battery cell of some embodiments, the first wall has a boss, the boss is protruding 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.

[0016] By providing a boss 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.

[0017] In the battery cell of some embodiments, the number of the boss is one; the boss is disposed on one side of the first wall in the first direction, or the boss is disposed at a middle position of the first wall in the first direction.

[0018] 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.

[0019] 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.

[0020] By arranging the first pole and the second pole on two bosses respectively, it is beneficial to improve the degree of freedom of setting the bosses and to reduce the space occupied by the bosses.

[0021] In the battery cell of some embodiments, the two bosses are arranged at a distance from each other near the middle position of the first wall, or the two bosses are arranged on the same side of the first wall in the first direction.

[0022] The strength of the first wall of the battery can be improved by means of the two bosses and the poles arranged on the bosses.

[0023] In the battery cell of some embodiments, 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.

[0024] By providing a boss of a suitable size, it is possible to provide a pole, improve the strength of the first wall, and reduce the occupied space.

[0025] 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.

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

[0027] 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.

[0028] By providing a boss of a suitable 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, a dimension of the first wall in the length direction is greater than or equal to 350 mm.

[0030] 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.

[0031] In the battery cell of some embodiments, the distance between the outer contours of the first pole and the second pole 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.

[0032] 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 means of the restraining effect of other wall surfaces at the end edge.

[0033] In the battery cell of some embodiments, the distance between the outer contours of the first pole and the second pole and the end edge of the first wall in the first direction is in a range of 8.75 mm to 600 mm.

[0034] Thus, the electrode can be arranged at an appropriate position on the first wall, so that the conductive function can be reliably exerted and the function of reinforcing the first wall can be exerted.

[0035] In the battery cell of some embodiments, 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.

[0036] Thus, the poles can be arranged in the battery case with greater positional freedom. Even if there is a risk that the wall of the case where the poles are to be arranged will be greatly deformed, the deformation can be reduced by arranging the poles in a concentrated manner.

[0037] In a second aspect, the present application further provides a battery, comprising: a housing, and a plurality of battery cells as described above.

[0038] This makes it possible to provide a battery in which the outer shell of the battery cell is not easily deformed or the deformation amount is small.

[0039] 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 arranged along the width direction of the first wall, respectively.

[0040] This makes it easy to group the battery cells and to easily connect the first electrode post and the second electrode post.

[0041] 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 bus and an electrical kit, the bus 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, and 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 bus and the electrical kit.

[0042] Therefore, by forming a accommodating portion between the battery box wall 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 helpful to suppress the overall volume of the battery box and improve the overall volume utilization of the battery box.

[0043] In the battery of some embodiments, 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, and the accommodating portion includes a space on one side of the protrusion facing the first wall.

[0044] 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.

[0045] In some embodiments of the battery, the battery also 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.

[0046] Therefore, the area other than the pole arrangement area on the first wall of the battery cell can be used to achieve heat exchange, which is beneficial to suppress the overall volume of the battery case and improve the volume utilization rate of the battery case.

[0047] 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.

[0048] 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.

[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 assembly 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.

[0050] 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 improved.

[0051] In the battery of some embodiments, the area of ​​the second region is larger than the area of ​​the first region.

[0052] 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 assembly.

[0053] In some embodiments of the battery, the heat exchange assembly includes: a heat exchange plate; and an adhesive layer, which is arranged 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, or is arranged 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.

[0054] Since the heat exchange assembly is bonded to the first wall and / or the box wall of the battery cell, it is beneficial to improve the strength of the first wall of the battery cell and further reduce the risk or amount of deformation.

[0055] In the battery of some embodiments, the distance between the top end 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.

[0056] 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.

[0057] 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.

[0058] Since the first pole and the second pole are arranged in a concentrated manner, the first pole and the second pole can be easily observed, maintained, etc. by opening a through hole in the first box wall.

[0059] 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.

[0060] 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, maintained and other operations can be performed through the through hole.

[0061] In the battery of some embodiments, the battery further comprises a closing cover for closing the through hole.

[0062] Thus, the through hole can be closed with the closing cover when not in use, thereby preventing foreign matter and the like from entering the battery case.

[0063] In some embodiments of the battery, 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, and the electrical kit includes 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.

[0064] By providing a protrusion on the battery case to form a accommodating portion, and accommodating the pole, busbar, electrical kit, etc. in the accommodating 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.

[0065] In a third aspect, the present application further provides an electrical device, which includes a plurality of battery cells as described above, or a battery as described above, and the battery cells or the battery serve as a power source for the vehicle.

[0066] Thus, it is possible to provide an electric device equipped with a battery whose outer casing of a battery cell is not easily deformed or has a small deformation, which is advantageous in reducing maintenance time.

[0067] In some embodiments of the present application, the electric device includes a vehicle.

[0068] This makes it possible to provide a vehicle equipped with a battery in which the outer casing of the battery cell is not easily deformed or the deformation amount is small, which is advantageous in reducing the time required for maintenance.

[0069] In a fourth aspect, the present application further provides an energy storage device, which includes a plurality of battery cells as described above, or a battery as described above, wherein the battery cells or the battery are configured to store electrical energy and provide electrical energy.

[0070] Thus, it is possible to provide an energy storage device equipped with a battery whose casing of a battery cell is not easily deformed or has a small deformation, which is helpful in reducing maintenance time.

[0071] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0072] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0073] Figure 1 A schematic diagram of the structure of a vehicle provided in one embodiment of the present application;

[0074] Figure 2 A schematic diagram of a battery cell provided in an embodiment of the present application;

[0075] Figure 3 A schematic diagram of a battery cell provided in another embodiment of the present application;

[0076] Figure 4 A schematic diagram of a battery cell provided in yet another embodiment of the present application;

[0077] Figure 5A schematic diagram of a battery cell with a boss provided in one embodiment of the present application;

[0078] Figure 6 A schematic diagram of a battery cell with a boss provided in another embodiment of the present application;

[0079] Figure 7 A schematic diagram of a battery cell with a boss provided in yet another embodiment of the present application;

[0080] Figure 8 A schematic diagram of a battery cell with a boss provided in yet another embodiment of the present application;

[0081] Fig. 9 An exploded perspective schematic diagram of a battery cell provided in one embodiment of the present application;

[0082] Fig.10 An exploded perspective schematic diagram of a battery cell with a boss provided in one embodiment of the present application;

[0083] Fig.11 A schematic top view of a battery cell provided in one embodiment of the present application;

[0084] Fig.12 Another schematic top view of a battery cell provided by an embodiment of the present application;

[0085] Fig.13 A schematic front view of a battery cell provided in one embodiment of the present application;

[0086] Fig.14 A schematic front view of a battery cell with a boss provided in one embodiment of the present application;

[0087] Fig.15 An exploded perspective schematic diagram of a battery provided in one embodiment of the present application;

[0088] Fig.16 for Fig.15 A schematic diagram of a portion of the structure in the battery shown;

[0089] Fig.17 A three-dimensional schematic diagram of a battery provided in another embodiment of the present application;

[0090] Fig.18 for Fig.17 AA section view schematic diagram in;

[0091] Fig.19 for Fig.18 A magnified schematic diagram of part B in FIG.

[0092] Fig. 20 An exploded perspective schematic diagram of a battery provided in yet another embodiment of the present application;

[0093] Fig.21 A schematic diagram of the structure of a seat and a battery in a vehicle provided in one embodiment of the present application;

[0094] Fig. 22 A schematic diagram of the structure of an energy storage device provided in one embodiment of the present application.

[0095] Description of Reference Numerals

[0096] 100, vehicle; 10, battery; 11, box; 111a, box accommodating cavity; 111b, accommodating portion; 111, box wall; 1111, protrusion; 1112, closure 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

[0097] It should be noted that, in the absence of conflict, the embodiments and technical features in the embodiments of the present application can be combined with each other, and the detailed description in the specific implementation method should be understood as an explanation of the purpose of the present application and should not be regarded as an improper limitation on the present application.

[0098] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions.

[0099] At present, new energy batteries are increasingly used in life and industry. New energy batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as in aerospace and other fields.

[0100] In order to cope with various battery grouping scenarios, there are battery cells of various shapes in the industry, 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 of deformation due to the longer middle span. 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 in the industry.

[0101] According to research, 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 wall or end cover (especially the pole configuration area), thereby suppressing deformation.

[0102] Based on such technical concept, the present application 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 farthest distance between the outer contours of the first pole and the second pole is less than half the size of the first wall.

[0103] 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 configuration area in the first wall can be improved, which is conducive to reducing the risk of deformation of the first wall (especially the pole configuration area).

[0104] The battery cell of the present application can be used in, but not limited to, electrical devices such as vehicles, ships, or aircraft. The battery cell, battery, etc. of the present application can be used to form a power supply system of the electrical device.

[0105] The present application provides an electric device using a battery as a power source, and the electric device may be, but is not limited to, a mobile phone, a tablet, a laptop, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc. Among them, the electric toy may include a fixed or mobile electric toy, for example, a game console, an electric car toy, an electric ship toy, an electric airplane toy, etc., and the spacecraft may include an airplane, a rocket, a space shuttle, a spacecraft, etc.

[0106] For the convenience of description, an electric device according to an embodiment of the present application is described below by taking a vehicle 100 as an example.

[0107] Figure 1 The structure diagram of the vehicle 100 provided in one embodiment of the present application is shown in FIG. The vehicle 100 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended range vehicle. Fig.21 As shown, a battery 10 is disposed inside the vehicle 100, and the battery 10 can be disposed 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 be used as an operating power source for the vehicle 100. The vehicle 100 may also include a controller and a motor, and 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.

[0108] In some embodiments of the present application, the battery 10 can be used 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 .

[0109] In the present application, a battery includes a plurality of battery cells. A battery cell refers to a basic unit that can realize the mutual conversion between chemical energy and electrical energy, and can be used to make a battery module or a battery pack, so as to supply power to an electrical device. A battery cell may be a secondary battery, which refers to a battery cell that can be continuously used by activating the active material by charging after the battery cell is discharged. The battery cell may be a lithium-ion battery, a sodium-ion battery, a sodium-lithium-ion battery, a lithium metal battery, a sodium metal battery, a lithium-sulfur battery, a magnesium-ion battery, a nickel-hydrogen battery, a nickel-cadmium battery, a lead-acid battery, etc., and the present application does not limit this.

[0110] A battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charge and discharge process of the battery cell, active ions (such as lithium ions) are embedded and removed between the positive electrode and the negative electrode. The separator is set between the positive electrode and the negative electrode to prevent the positive and negative electrodes from short-circuiting, while allowing active ions to pass through.

[0111] 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 application has no specific restrictions on the type of electrolyte, which can be selected according to needs. The electrolyte can be liquid, gel or solid.

[0112] In some embodiments, the 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 (such as polypropylene), a composite metal housing (such as a copper-aluminum composite housing), or an aluminum-plastic film.

[0113] As an example, the battery cell may be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell of other shapes. The prismatic battery cell includes a square-shell battery cell, a blade-shaped battery cell, a polygonal battery, such as a hexagonal battery.

[0114] In some embodiments, the housing includes an end cap and a shell, the shell is provided with an opening, and the end cap closes the opening to form a closed space for accommodating substances such as the electrode assembly and the electrolyte. The shell may be provided with one or more openings. One or more end caps may also be provided.

[0115] In some embodiments, at least one electrode terminal (also called "electrode column") is provided on the housing, and the electrode terminal is electrically connected to the pole tab. The electrode terminal can be directly connected to the pole tab, or indirectly connected to the pole tab through a transition component. The electrode terminal can be provided on the end cap or on the housing. In some embodiments, a pressure relief mechanism is provided on the housing. The pressure relief mechanism is used to release the internal pressure of the battery cell.

[0116] In the embodiment of the present application, the battery may also be a single physical module (eg, 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 connection through a busbar.

[0117] In the description of this application, the technical terms "first", "second", "third", "fourth", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of this application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0118] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0119] In the description of this application, the term "and / or" is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0120] In the description of the embodiments of the present application, for the convenience of explanation, the direction of arrow a is the "length direction of the battery cell" and the "length direction of the first wall", the direction of arrow b is the "width direction of the battery cell" and the "width direction of the first wall", and the direction of arrow c is the "height direction of the battery cell". The direction of arrow X is the "height direction of the battery" and the "height direction of the vehicle", the direction of x1 is the "top" and "above", the direction of x2 is the "bottom" and "below", the direction of arrow Y is the "length direction of the battery" and the "length direction of the vehicle", and the direction of arrow Z is the "width direction of the battery" and the "width direction of the vehicle".

[0121] In the description of this application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0122] In the description of this application, unless otherwise clearly specified and limited, the technical term "contact" should be understood in a broad sense, and can be direct contact or contact through an intermediate medium layer. It can be contact with essentially no interaction force between the two contacting parties, or it can be contact with interaction force between the two contacting parties.

[0123] Below, some embodiments of the present application are described in detail with reference to the accompanying drawings.

[0124] Figure 1 A schematic diagram of the structure of a vehicle provided in one embodiment of the present application; Figure 2 A schematic diagram of a battery cell provided in an embodiment of the present application; Figure 3 A schematic diagram of a battery cell provided in another embodiment of the present application;

[0125] Figure 4 A schematic diagram of a battery cell provided in yet another embodiment of the present application; Figure 5 A schematic diagram of a battery cell with a boss provided in one embodiment of the present application; Figure 6 A schematic diagram of a battery cell with a boss provided in another embodiment of the present application; Figure 7 A schematic diagram of a battery cell with a boss provided in yet another embodiment of the present application;

[0126] Figure 8 A schematic diagram of a battery cell with a boss provided in yet another embodiment of the present application; Fig. 9An exploded perspective schematic diagram of a battery cell provided in one embodiment of the present application; Fig.10 This is an exploded perspective schematic diagram of a battery cell with a boss provided in one embodiment of the present application; Fig.11 A schematic top view of a battery cell provided in one embodiment of the present application; Fig.12 Another schematic top view of a battery cell provided by an embodiment of the present application; Fig.13 A schematic front view of a battery cell provided in one embodiment of the present application; Fig.14 A schematic top view of a battery cell with a boss provided in one embodiment of the present application.

[0127] According to some embodiments of the present application, Figures 2 to 4 As shown, the battery cell 121 includes a housing 1211, a first pole 1213a and a second pole 1213b. The housing 1211 has a first wall 1211a, and the first pole 1213a and the second pole 1213b are arranged on the first wall 1211a. Figures 2 to 4 as well as Fig.11 and Fig.14 As shown, the first pole 1213a and the second pole 1213b are arranged along the first direction, and, along the first direction (ie, the arrangement direction of the poles), 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.

[0128] In some embodiments, the housing 1211 is in the shape of a quadrangular prism, for example. Fig. 9 and Fig.10 As shown, it includes a first wall 1211a and a shell 1211b. The shell 1211b has a storage space inside, in which an electrode assembly 1216 is stored. The electrode assembly 1216 includes a tab 1217. The tabs 1217 are generally two, one is a positive tab and the other is a negative tab. The two tabs 1217 are electrically connected to the first pole 1213a and the second pole 1213b provided on the first wall 1211a, respectively, so that current flows between the battery cell and an external power device or a charging device.

[0129] 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, 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, prism-shaped, or other suitable shapes. The shapes of the first pole 1213a and the second pole 1213b shown in the figures of the present application are only examples, and other shapes are also possible.

[0130] like Figures 2 to 4 as well as Fig.11 and Fig.14 As shown, 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. Figure 2 and Figure 3 As shown, the first direction may be a direction consistent with the length direction a of the battery cell, or may be 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 may be an arrangement aligned with each other along the first direction, that is, the projections along the first direction completely overlap; or they may 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 application, as a specific example, the arrangement of alignment along the first direction is taken as an example for explanation.

[0131] Along the first direction 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. Fig.11 In the example shown, the distance L2 is the maximum distance between the outer contours of the first pole 1213a and the second pole 1213b; Fig.14 In the example shown, the distance W2 is the maximum distance between the outer contours of the first pole 1213a and the second pole 1213b. The dimension 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). Fig.11 In the example shown, L1 represents the dimension of the first wall 1211a along the first direction; Fig.14 In the example shown, W1 represents the dimension of the first wall 1211 a along the first direction.

[0132] Further, in Fig.11 In the example shown, the distance L2 is the farthest 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 that L2 / L1 is less than 50%. Fig.14 In the example shown, the distance indicated by W2 is the farthest 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 that W2 / W1 is less than 50%.

[0133] Since the first pole 1213a and the second pole 1213b are both arranged on the first wall 1211a and the farthest distance between the outer contours of the first pole 1213a and the second pole 1213b is less than half of 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, thereby improving the strength of the pole arrangement area in the first wall 1211a and even the entire first wall 1211a through the mutual cooperation of the two pole structures, which is conducive to reducing 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 conducive to fully utilizing other spaces of the first wall 1211a, and is also conducive to centralized processing of the poles and their attached components during processing and maintenance (described in detail later).

[0134] In some embodiments, Fig.11 As shown, along the first direction, the farthest distance L2 between the outer contours of the first pole 1213a and the second pole 1213b does not exceed 40% of the dimension L1 of the first wall 1211a in the first direction.

[0135] 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 total 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.

[0136] In some embodiments, Fig.12 As shown, the distance L3 between the outer contour of the first pole 1213a and the second pole 1213b and the end 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.

[0137] 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 means of the restraining effect of other wall surfaces at the end edge.

[0138] In some embodiments, Fig.12 and Fig.14 As shown, the distance between the outer contour of the first pole 1213a and the second pole 1213b and the end edge of the first wall 1211a in the first direction is in the range of 8.75 mm to 600 mm.

[0139] exist Fig.12In the illustrated embodiment, the first direction is consistent with the length direction of the first wall 1211a, and the distance L3 between the outer contour of the first pole 1213a and the second pole 1213b and the end edge of the first wall 1211a in the first direction is in the range of 8.75mm to 600mm. Optionally, the distance L3 can be, for example, 8.75mm, 9mm, 10mm, 50mm, 100mm, 200mm, 300mm, 400mm, 500mm, or 600mm. Fig.14 In the illustrated embodiment, the first direction is consistent with the width direction of the first wall 1211a, and the distance W3 between the outer contours of the first pole 1213a and the second pole 1213b and the end edge of the first wall 1211a in the first direction is in the range of 8.75mm to 600mm. Optionally, the distance W3 can be, for example, 8.75mm, 9mm, 10mm, 50mm, 100mm, 200mm, 300mm, 400mm, 500mm, 600mm.

[0140] Thus, the electrode can be arranged at an appropriate position on the first wall, and the conductive function can be reliably exerted, and the function of reinforcing the first wall can be exerted.

[0141] In some embodiments, Fig.11 and Fig.12 As shown, the dimension L1 of the first wall 1211a in the length direction a is greater than or equal to 350 mm.

[0142] 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.

[0143] Furthermore, the dimension L1 of the first wall 1211a in the length direction a may be in the range of 350 mm to 700 mm. In some embodiments, the battery cells with a length in this range are also referred to as short-blade battery cells. Specifically, the length dimension may be 350 mm, 400 mm, 450 mm, 500 mm, 550 mm, 600 mm, 650 mm, or 700 mm.

[0144] Furthermore, the dimension L1 of the first wall 1211a in the length direction a may be in the range of 800 mm to 1200 mm. In some embodiments, the battery cells with a length in this range are also referred to as long-blade battery cells. Specifically, the length dimension may be 800 mm, 850 mm, 900 mm, 1000 mm, 1100 mm, or 1200 mm.

[0145] Concentrating the first pole 1213a and the second pole 1213b is more conducive to improving the strength of the end cover of the battery with a longer length.

[0146] In some embodiments, Figure 2 , Figure 3 , Fig. 9 , Figures 11 to 13 As shown, the first direction is consistent with the length direction a of the first wall 1211 a , and the first pole 1213 a and the second pole 1213 b are arranged at intervals from each other along the length direction a.

[0147] 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 within the plane where the pole is provided.

[0148] The first pole 1213a and the second pole 1213b are arranged at a distance from each other along the length direction a. The lower limit of the size of the distance is at least such that the first pole 1213a and the second pole 1213b are not electrically connected to each other, and can also be a minimum distance set in consideration of component installation space, operation space, etc.; the upper limit needs to make the maximum distance between the outer contours of the first pole 1213a and the second pole 1213b less than half of the size of the first wall 1211a. As long as the above requirements are met, it can be set according to specific circumstances.

[0149] 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 it is conducive to further reducing the risk of deformation of the first wall. In detail, especially for the long knife battery, 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 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.

[0150] In some embodiments, Figure 4 , Figure 7 , Fig.14 As shown, the first direction may also be consistent with the width direction b of the first wall 1211 a , and the first pole 1213 a and the second pole 1213 b are arranged at intervals from each other along the width direction b.

[0151] Regarding the size of the interval, similarly, its lower limit is at least such that the first pole 1213a and the second pole 1213b are not electrically connected to each other, and can also be a minimum interval set in consideration of component installation space, operation space, etc.; its upper limit needs to make the maximum distance between the outer contours of the first pole 1213a and the second pole 1213b less than half of the size of the first wall 1211a. As long as the above requirements are met, it can be set according to specific circumstances.

[0152] By arranging the first pole 1213a and the second pole 1213b along the width direction b, the strength of the pole arrangement area in the first wall 1211a can be improved, which is conducive to reducing the risk of deformation of the first wall 1211a. In addition, by concentrating the first pole 1213a and the second pole 1213b along the width direction, it is more conducive to fully utilizing the other space of the first wall 1211a.

[0153] In the battery cell of some embodiments, the first pole 1213a and the second pole 1213b are both arranged on the same side of the first wall 1211a along the first direction, 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. The first direction can be consistent with the length direction of the first wall 1211a, or it can be consistent with the width direction.

[0154] In some embodiments, Figure 2 , Figure 3 , Fig. 9 , Figures 11 to 13 As shown, 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.

[0155] like Figure 2 As shown, 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. Exemplarily, the first pole 1213a and the second pole 1213b can be symmetrically arranged about the length center line 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 arranged on both sides of the length center line. Figure 2In the example shown, along the length direction a, the area on both sides of the first pole 1213a and the second pole 1213b on the first wall 1211a 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 in the area between the first pole 1213a and the second pole 1213b, and the explosion-proof valve can also be arranged on other walls instead of the first wall 1211a.

[0156] like Figure 3 As shown, the first pole 1213a and the second pole 1213b are both arranged on one side of the first direction of the first wall 1211a. Exemplarily, the first pole 1213a and the second pole 1213b are both arranged close to 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 center line and close to the length center line, 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 above-mentioned length center line.

[0157] exist Figure 3 In the example shown, 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 (non-pole configuration area) 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 in the area between the first pole 1213a and the second pole 1213b, and the explosion-proof valve can also be arranged on other walls instead of the first wall 1211a.

[0158] By arranging the first pole 1213a and the second pole 1213b on one side in the length direction a, it is possible to improve the strength of the first wall 1211a while facilitating the use of other areas in the first wall 1211a; moreover, it can cooperate with other wall surfaces at the edge to improve the ease of assembly. By arranging the first pole 1213a and the second pole 1213b close to the middle position in the length direction a, it is possible to strengthen the middle area with a greater possibility of deformation, and it is conducive to evenly improving the overall strength of the first wall 1211a.

[0159] In some embodiments, Figures 5 to 8 , Fig.10 As shown, the first wall 1211 a has a boss 1214 , which is protruded relative to the first wall 1211 a in a direction away from the first wall 1211 a , and at least one of the first pole 1213 a and the second pole 1213 b is disposed on the boss 1214 .

[0160] A boss 1214 is provided on the surface of the first wall 1211a exposed to the housing 1211, and the boss 1214 is protruding relative to the first wall 1211a. The boss 1214 may be as wide as the first wall 1211a, that is, it has the same or substantially the same size in the width direction b; the boss 1214 may 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 the size of its outline. 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 may exceed the outline of the boss 1214, and the outline of the boss 1214 may 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 may exceed the outline of the pole.

[0161] In addition, there is no particular limitation on the shape of the boss 1214, and the boss 1214 may have the same or substantially the same shape as the pole, or may have a shape different from the pole. Figure 5 , Figure 6 , Figure 7 In the example shown, the shape of the boss 1214 is different from that of the pole. In addition, the boss 1214 extends along the longitudinal direction of the first wall 1211a to form a long strip shape.

[0162] 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.

[0163] The pole is disposed 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 lug 1217.

[0164] 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 application, the first pole 1213a and the second pole 1213b are both disposed on the boss for description.

[0165] 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 farthest 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.

[0166] 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.

[0167] In some embodiments, Figure 5 , Figure 6 and Figure 8 As shown, there is one boss 1214. The boss 1214 is disposed on one side of the first wall 1211a in the first direction, or the boss 1214 is disposed at a middle position of the first wall in the first direction.

[0168] Similar to the arrangement of the first pole 1213a and the second pole 1213b, Figure 6 As shown, the boss 1214 is disposed at 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. Exemplarily, the boss 1214 can be symmetrically disposed about the length center line 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 disposed on both sides of the length center line. Figure 6 In the example shown, along the length direction a, the area without the boss 1214 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 the first wall 1211a.

[0169] like Figure 5 As shown, the boss 1214 is disposed on one side of the first direction of the first wall 1211a, where the first direction is consistent with the length direction a of the first wall 1211a. Exemplarily, the boss 1214 is disposed close to the end of the length direction a of the first wall 1211a, or the boss 1214 is disposed on one side of the length center line and close to the length center line, or the boss 1214 is disposed between the end of the length direction a of the first wall 1211a and the above-mentioned length center line.

[0170] Either the first pole 1213 a or the second pole 1213 b may be disposed on the boss 1214 , and the other one may be 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 .

[0171] By arranging the first pole 1213 a and / or the second pole 1213 b on a 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.

[0172] like Figure 8 As shown, the number of bosses 1214 is one. The boss 1214 is disposed on one side of the first wall 1211a in the first direction ( Figure 7Alternatively, the boss 1214 is arranged at a middle position of the first wall in the first direction, where the first direction is consistent with the width direction b of the housing 1211.

[0173] In some embodiments, Figure 5 and Figure 6 As shown, 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 .

[0174] exist Figure 5 and Figure 6 In the embodiment, the first pole 1213a and the second pole 1213b are respectively arranged at the two ends of the boss 1214. In some embodiments, the boss 1214 can also be formed longer, that is, the first pole 1213a and the second pole 1213b can be arranged at a certain distance from the two ends of the boss 1214.

[0175] By arranging the first pole 1213a and the second pole 1213b on the same boss 1214 along the length direction a, it is more conducive to improving the strength of the first wall.

[0176] In some embodiments, Figure 7 and Fig.10 As shown, 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 a first direction.

[0177] 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. In the embodiment with two bosses 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), the maximum distance between the outer contours of the first pole 1213a and the second pole 1213b provided on each boss 1214 is less than half of the total length of the first wall 1211a.

[0178] In some embodiments, along the length direction a of the shell 1211, the farthest 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 farthest 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.

[0179] By respectively arranging the first pole 1213 a and the second pole 1213 b on the two bosses 1214 , it is beneficial to improve the degree of freedom in setting the bosses 1214 and to reduce the space occupied by the bosses 1214 .

[0180] In some embodiments, Figure 7 and Fig.10 As shown, the two bosses 1214 are arranged at a distance from each other near the middle position of the first wall 1211 a , or the two bosses 1214 are arranged on the same side of the first direction of the first wall 1211 a .

[0181] 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. Exemplarily, 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 center line 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 center line. In other embodiments, the two bosses 1214 are both located on one side of the length center line, and exemplarily, may be located near one end of the length direction a of the first wall 1211a.

[0182] The two bosses 1214 and the poles disposed on the bosses 1214 can increase the strength of the first wall 1211 a of the battery.

[0183] In some embodiments, a 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.

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

[0185] In some embodiments, Figure 6 As shown, 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 Fig.13 As shown, the height dimension L7 of the boss 1214 protruding relative to the first wall 1211a does not exceed 300 mm.

[0186] Exemplarily, the first direction is consistent with the length direction a of the first wall 1211a, and the second direction is consistent with the width direction b of the first wall 1211a. The dimension L6 of the boss 1214 in the second direction can be 50mm, 100mm, 200mm, 300mm, 400mm, 500mm. The height dimension L7 of the boss 1214 protruding relative to the first wall 1211a can be 20mm, 50mm, 100mm, 150mm, 200mm, 300mm.

[0187] By providing the boss 1214 with a suitable size, it is possible to provide the pole, improve the strength of the first wall, and reduce the occupied space.

[0188] In some embodiments, Figure 6 As shown, the dimension L6 of the boss 1214 in the second direction ranges from 100 mm to 400 mm; and / or, the height dimension L7 of the boss 1214 ranges from 20 mm to 100 mm.

[0189] By providing the boss 1214 with a suitable size, it is possible to provide the pole, improve the strength of the first wall, and reduce the occupied space.

[0190] In some embodiments, Fig. 9 and Fig.10 As shown, the first wall 1211a is an end cap of the battery cell. Fig.14 As shown, the first wall 1211a is the wall with the largest area in the housing 1211. In other embodiments, such as Figure 3 As shown, the first wall 1211 a is a wall of the housing 1211 that faces the end cover.

[0191] Thus, the poles can 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 poles are to be arranged will be greatly deformed, the deformation can be reduced by arranging the poles in a concentrated manner.

[0192] A second aspect of the present application provides a battery.

[0193] Fig.15 An exploded perspective schematic diagram of a battery provided in one embodiment of the present application; Fig.16 for Fig.15 A schematic diagram of a portion of the structure in the battery shown; Fig.17 A three-dimensional schematic diagram of a battery provided in another embodiment of the present application; Fig.18 for Fig.17 AA section view schematic diagram in; Fig.19 for Fig.18 A magnified schematic diagram of part B in FIG. Fig. 20 The present invention is a schematic exploded perspective view of a battery provided in accordance with another embodiment of the present invention.

[0194] In some embodiments, Figures 15 to 20 As shown, the battery 10 includes a housing 11 and a plurality of battery cells 121 .

[0195] like Fig.15As shown, a box accommodating cavity 111a for accommodating battery cells 121 and other components is formed inside the box 11. Multiple battery cells 121 are arranged into battery cell rows 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.

[0196] In some embodiments, Fig.15 and Fig.16 As shown, a plurality of battery cells 121 in the housing cavity 111a of the battery 10 are electrically connected to each other through a busbar 122. Specifically, the busbar 122 electrically connects a first pole 1213a of one battery cell 121 with a second pole 1213b of another battery cell 121, and the two battery cells 121 may be adjacent.

[0197] In addition, a sampling structure and an electrical kit 123 are also provided in the box accommodating chamber 111 a of the battery 10 .

[0198] Thus, a battery in which the outer shell 1211 of the battery cell 121 is not easily deformed or the deformation amount is small can be provided.

[0199] In some embodiments, Fig.15 and Fig.16 As shown, the first direction is consistent with the length direction a of the battery cell, and the plurality of 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 arranged along the width direction b of the first wall respectively.

[0200] In some embodiments, the first pole 1213a and the second pole 1213b are electrically connected via the bus 122. The present application does not particularly limit the shape of the bus 122, as long as it can realize the function of electrically connecting the first pole 1213a and the second pole 1213b. Fig.16 In the embodiment, as an example, the busbar 122 is configured in the shape of a relatively small plate.

[0201] This makes it easy to group the battery cells and to easily connect the first electrode post 1213 a and the second electrode post 1213 b .

[0202] In some embodiments, Figures 17 to 19As shown, the box body 11 includes a box wall 111 facing the first wall 1211a of the battery cell 121, and the box wall 111 faces one side of the first wall 1211a of the battery cell 121 ( Fig.17 The battery 10 further includes a busbar 122 and an electrical kit 123. The busbar 122 is 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. The electrical kit 123 includes at least one of a sampling structure, a battery management system, a relay, and a high-voltage distribution unit. The housing 111b accommodates at least part of the first pole 1213a, the second pole 1213b, the busbar 122, and the electrical kit 123.

[0203] like Figures 17 to 19 As shown, a busbar 122 is connected above the first pole 1213a and the second pole 1213b (not shown in the figure), and a sampling structure is arranged above the busbar 122. In some embodiments, an electrical kit 123 may also be arranged. The protrusion 1111 may be located above the first pole 1213a and the second pole 1213b (not shown in the figure), and a part of the sampling structure enters 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.

[0204] Therefore, by forming a accommodating portion 111b between the battery box wall 111 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 helpful to suppress the overall volume of the battery box 11 and improve the overall volume utilization of the battery box 11.

[0205] In some embodiments of the battery, a protrusion 1111 is provided on the box wall 111 facing the first wall 1211a. The protrusion 1111 extends from the box wall 111 toward a direction away from the battery cell 121 ( Fig.17 The accommodating portion 111b includes a side of the protruding portion 111 facing the first wall 1211a ( Fig.17 The x2 direction in the space.

[0206] Therefore, by setting a protrusion 1111 on the case 11 of the battery 10 to form a housing 111b, and accommodating the pole, the busbar 122, the electrical kit 123, etc. in the housing 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.

[0207] 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.

[0208] In some embodiments, Figures 15 to 19 As shown, the battery 10 further includes a heat exchange component, which is disposed on the first wall 1211 of each battery cell 121, and is used to exchange heat with each battery cell 121. Along the thickness direction c of the first wall 1211a, the projections of the first pole 1213a and the second pole 1213b on the first wall 1211a do not overlap with the projection of the heat exchange component on the first wall 1211a.

[0209] The heat exchange assembly is used to exchange heat with the battery cell 121, and can play a heating and / or cooling role. In some embodiments, the heat exchange assembly includes a heat exchange plate 14 with a flow channel therein, the flow channel is for the heat exchange medium to flow, and the flow channel has an inlet and an outlet, which are respectively connected to the heat exchange medium pipeline. The present application has no special restrictions on the heat exchange assembly, and an existing heat exchange assembly of suitable size can be used. For example, the heat exchange medium can use water, ethylene glycol, etc.

[0210] Thus, heat exchange can be achieved by utilizing the area other than the pole arrangement area on the first wall 1211 a of the battery cell, which is beneficial to suppressing the overall volume of the battery case 11 and improving the volume utilization rate within the battery case 11 .

[0211] In some embodiments, Fig.15 and Fig.16 As shown, 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 the second areas 120b is two, and the two second areas 120b are respectively located on both sides of the first area 120a.

[0212] 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 cells 121 as a whole is facilitated, and the strength of the first wall 1211a of the battery cells 121 is further improved.

[0213] In some embodiments, Fig.15 and Fig.16As shown, the first pole 1213a and the second pole 1213b are arranged in the middle position of 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.

[0214] In other embodiments, Figure 3 , Figure 5 As shown in the figure, the first pole 1213a and the second pole 1213b are arranged on one side of the length direction of the battery cell 121, and the two battery cells 121 are arranged along the length direction a of the battery cell 121 in a manner that the first pole 1213a and the second pole 1213b are close to or in contact with each other, so that a battery cell unit is formed along the length direction a, and such a battery cell unit is arranged along the width direction b of the battery cell 121, as shown in the figure. Fig. 20 As shown, the first pole 1213a and the second pole 1213b can be concentrated in the first area 120a.

[0215] The arranged battery cells 121 may be close to, in contact with, or bonded to each other.

[0216] 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.

[0217] You can Figure 3 , Figure 5 As shown in the figure, the first pole 1213a and the second pole 1213b are arranged on one side of the length direction of the battery cell 121, and the two battery cells 121 are arranged along the length direction a of the battery cell 121 in a manner that the sides where the first pole 1213a and the second pole 1213b are formed are far away from each other (the sides where the poles are not formed are close to or in contact with each other), so that a battery cell unit is formed along the length direction a, and such a battery cell unit is arranged along the width direction b of the battery cell 121. Thus, an arrangement form in which the poles are located on both sides of the first surface 120 is formed. In this way, a larger area without poles, i.e., the second area 120b, can be formed, and a heat exchange component can be arranged in the second area 120b.

[0218] 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 cells is facilitated and the strength of the first wall of the battery cells is improved.

[0219] In some embodiments, the area of ​​the second region 120b is greater than the area of ​​the first region 120a. Since the farthest distance between the outer contours of the first pole 1213a and the second pole 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 pole is smaller than the area of ​​the second region 120b where the pole is not formed.

[0220] 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.

[0221] 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, or, 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.

[0222] like Fig.15 , Fig.18 and Fig.19 As shown, 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 may 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 the first adhesive layer 15, and is bonded to the surface (first wall 1211a) of the battery cell 121 through the 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 through the first adhesive layer 15, or is bonded to the surface (first wall 1211a) of the battery cell 121 through the second adhesive layer 16.

[0223] 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.

[0224] In some embodiments, Fig.19As shown, the distance L5 between the top 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.

[0225] Since the heat exchange assembly does not extend beyond the pole along the thickness direction of the first wall 1211a, it is beneficial to suppress the overall volume of the battery and improve the volume utilization of the battery.

[0226] In some embodiments, Fig.18 and Fig.19 As shown, 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, and 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.

[0227] In some embodiments, the through hole 1113 is opened 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 opened 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.

[0228] Since the first pole 1213a and the second pole 1213b are centrally arranged, the first pole 1213a and the second pole 1213b can be easily observed and maintained by opening the through hole 1113 on the first box wall. Since the first pole 1213a and the second pole 1213b are centrally arranged, it is beneficial to suppress the opening size of the through hole 1113.

[0229] In some embodiments, Fig.18 and Fig.19 As shown, 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.

[0230] 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, and the connection method can be welding or detachable clamping.

[0231] The length dimension of the protrusion 1111 in the longitudinal direction is not greater than 500 mm. Optionally, it can be selected in the range of 50 mm to 300 mm. For example, the length dimension can be 50 mm, 100 mm, 150 mm, 200 mm, 250 mm, 300 mm, 350 mm, 400 mm, 450 mm, 500 mm.

[0232] 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 .

[0233] In some embodiments, the battery further includes a closing cover 1112 for closing the through hole 1113 .

[0234] The closing cover 1112 is, for example, configured in a flat plate shape, and can be connected to the protruding portion 1111 in a manner such that the closing cover 1112 can be opened and closed relative to the through hole 1113 by means of hinges, snap connections, etc.

[0235] In addition, Fig.19 In the figure, the through hole 1113 is formed in the protruding portion 1111 . When 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 .

[0236] 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 .

[0237] In some embodiments, the battery also includes a bus 122 and an electrical kit 123, the bus 122 is 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 includes 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 bus 122 and the electrical kit 123 on the first box wall at least partially fall within the range of the through hole 1113.

[0238] By providing a protrusion 1111 on the battery case 11 to form a housing 111b, and accommodating the pole, the busbar 122, the electrical kit 123, etc. in the housing 111b, it is not only beneficial to suppress the overall volume of the battery case 11 and improve the overall volume utilization of the battery case 11, but also beneficial to observe, maintain, and perform other operations on more components through the through hole 1113.

[0239] A third aspect of the present application 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.

[0240] Thus, it is possible to provide an electrical device equipped with a battery in which the housing 1211 of the battery cell 121 is not easily deformed or has a small deformation, which is beneficial for reducing maintenance time.

[0241] Fig.21 This is a schematic diagram of the structure of the seat and battery in a vehicle provided in one embodiment of the present application. Figure 1 and Fig.21 As shown, in some embodiments, the electrical device includes a vehicle 100 .

[0242] In some embodiments, the battery 10 is mounted on the lower portion of the vehicle 100. Fig.21 As shown, seats 20 are provided in the driving space of the vehicle 100, and the battery 10 is installed under these seats 20. In some embodiments, a vehicle body floor is provided between the battery 10 and the seats 20. In other embodiments, the seats 20 are directly provided on the battery 10.

[0243] Thus, a vehicle equipped with a battery in which the housing 1211 of the battery cell 121 is not easily deformed or the deformation amount is small can be provided, which is advantageous in reducing the time required for maintenance.

[0244] A fourth aspect of the present application provides an energy storage device.

[0245] Fig. 22 This is a schematic diagram of the structure of an energy storage device provided in one embodiment of the present application. Fig. 22 As shown, the energy storage device includes a plurality of battery cells 121 provided in the first aspect, or a battery 10 provided in the second aspect, and the battery cells 121 or the battery 10 are configured to store and provide electrical energy.

[0246] In some embodiments, Fig.11 As shown, the energy storage device 200 includes a bracket 201 , and the battery 10 is placed on the bracket 201 .

[0247] Thus, it is possible to provide an energy storage device 200 equipped with a battery cell 121 whose housing 1211 is not easily deformed or has a small deformation, which is beneficial for reducing maintenance time.

[0248] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application is described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way.

Claims

1. A battery cell, characterized in that: include: a housing having a first wall; A first pole and a second pole are arranged on the first wall, Wherein, the first pole and the second pole are arranged along a first direction, Along the first direction, the farthest distance between the outer contours of the first pole and the second pole is less than half of the size of the first wall.

2. The battery cell according to claim 1, characterized in that: Along the first direction, the farthest 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, characterized in that: 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, characterized in that: The first direction is consistent with the width direction of the first wall, The first pole and the second pole are arranged at intervals from each other along the width direction.

5. The battery cell according to any one of claims 1 to 4, characterized in that: 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 4, characterized in that: 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 disposed on the boss.

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

8. The battery cell according to claim 6, characterized in that: 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.

9. The battery cell according to claim 8, characterized in that: 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 along the first direction.

10. The battery cell according to claim 6, characterized in that: A projection area of ​​the boss on 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 claim 6, characterized in that: The number of the boss is one, and the boss is arranged at 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; or, 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; A projection area of ​​the boss on the first wall along a thickness direction of the first wall accounts for 10% to 30% of an area of ​​the first wall.

12. The battery cell according to claim 6, characterized in that: 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.

13. The battery cell according to claim 11, characterized in that: 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.

14. The battery cell according to claim 12, characterized in that: 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.

15. The battery cell according to any one of claims 1 to 4, characterized in that: The length dimension of the first wall is greater than or equal to 350 mm.

16. The battery cell according to any one of claims 1 to 4, characterized in that: 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.

17. The battery cell according to any one of claims 1 to 4, characterized in that: 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.

18. The battery cell according to any one of claims 1 to 4, characterized in that: 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 that is opposite to the end cover.

19. A battery, characterized in that: include: Box, A plurality of battery cells according to any one of claims 1 to 18.

20. The battery according to claim 19, characterized in that 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 arranged along the width direction of the first wall respectively.

21. The battery according to claim 19, characterized in that The box body comprises 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.

22. The battery according to claim 21, characterized in that 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 one side of the protrusion facing the first wall.

23. The battery according to any one of claims 19 to 22, characterized in that 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.

24. The battery according to claim 23, characterized in that 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 second regions is two, and the two second regions are respectively located on both sides of the first region.

25. The battery according to claim 23, characterized in that 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.

26. The battery according to claim 24, characterized in that The area of ​​the second region is greater than that of the first region.

27. The battery according to claim 23, characterized in that The heat exchange component comprises: Heat exchange plates; and The adhesive layer is arranged 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 arranged on a side of the heat exchange plate away from the first wall, and the box body includes a box wall facing the first wall, and the heat exchange plate is bonded to the box wall through the adhesive layer.

28. The battery according to claim 23, characterized in that 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 component in the thickness direction of the first wall.

29. The battery according to any one of claims 19 to 22, characterized in that A through hole is provided in 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 the first box wall, and 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.

30. The battery according to claim 29, characterized in that The first box wall is provided with a protrusion that is protruded 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.

31. The battery according to claim 29, characterized in that The battery further includes a closing cover for closing the through hole.

32. The battery according to claim 29, characterized in that 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, the projections of the busbar and the electrical assembly on the first box wall at least partially fall within the range of the through hole.

33. An electrical device, characterized in that: The electrical device comprises a plurality of battery cells according to any one of claims 1 to 18, or a battery according to any one of claims 19 to 32, and the battery cells or the battery serve as a power source for the electrical device.

34. The electrical device according to claim 33, characterized in that: Including vehicles.

35. An energy storage device, characterized in that: The energy storage device comprises a plurality of battery cells according to any one of claims 1 to 18 or a battery according to any one of claims 19 to 32, wherein the battery cells or the battery are configured to store electrical energy and provide electrical energy.

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