Battery cell, battery, and electrical apparatus

Abstract

A battery cell (10), a battery (100), and an electrical apparatus. The battery cell (10) comprises a housing (11) and a post (12). The housing (11) comprises a first wall portion (111) and a second wall portion (112), the first wall portion (111) and the second wall portion (112) being disposed adjacent to each other. The first wall portion (111) comprises a first main body portion (1111) and a first protruding portion (1112), the first protruding portion (1112) protruding from an outer surface of the first main body portion (1111) in the thickness direction (X) of the first wall portion (111). The second wall portion (112) comprises a second main body portion (1121) and a first extension portion (1122), the first extension portion (1122) being located on a side of the second main body portion (1121) close to the first wall portion (111). The first main body portion (1111) is connected to the second main body portion (1121), the first protruding portion (1112) is connected to the first extension portion (1122) to form a protrusion (10a) on the surface of the housing (11), and the post (12) is disposed on the protrusion (10a). The present battery cell (10) helps to increase the volume of the protrusion (10a), thereby facilitating improvement of the capacity of the battery cell (10) and facilitating improvement of the space utilization rate in the battery cell (10); additionally, the protrusion (10a) can be provided even when the size of the battery cell (10) is small.

Description

Battery monomer, battery and electric device TECHNICAL FIELD

[0001] The embodiment of the present disclosure relates to the technical field of battery, in particular to a battery monomer, a battery and an electric device. BACKGROUND

[0002] In recent years, the application of battery in life and industry is more and more extensive.

[0003] A plurality of battery monomers are arranged in the battery. In order to increase the number of battery monomers in the limited space and further improve the capacity of the battery, the width size of the battery monomer is required to be smaller and more battery monomers can be arranged along the width direction of the battery monomer. At the same time, in order to improve the space utilization in the battery, a protrusion is arranged on the outer surface of the battery to increase the volume of the battery monomer.

[0004] With the decrease of the size of the battery monomer, the area on the outer surface of the battery that can be used to arrange the protrusion is smaller and smaller, which leads to the decrease of the size of the protrusion, which is not conducive to arranging other devices of the battery monomer in the protrusion and is not conducive to the manufacturing of the protrusion.

[0005] SUMMARY

[0006] Therefore, the embodiment of the present disclosure aims to provide a battery monomer, a battery and an electric device which can increase the size of the protrusion on the basis of the size of the battery monomer.

[0007] To achieve the above-mentioned purpose, the technical scheme of the embodiment of the present disclosure is as follows:

[0008] The embodiment of the present disclosure provides a battery monomer, comprising:

[0009] A shell comprising a first wall portion and a second wall portion, the first wall portion and the second wall portion are arranged adjacent to each other, the first wall portion comprises a first main body portion and a first protruding portion, the first protruding portion protrudes from the outer surface of the first main body portion along the thickness direction of the first wall portion; the second wall portion comprises a second main body portion and a first extending portion, the first extending portion is located on the side of the second main body portion close to the first wall portion, the first main body portion is connected with the second main body portion, and the first protruding portion is connected with the first extending portion to form a protrusion on the surface of the shell;

[0010] A pole is arranged in the protrusion.

[0011] The battery cell in the embodiments of the present disclosure has the protrusion formed by the two different wall portions, which is beneficial to increase the size of the protrusion along the thickness direction of the second wall portion under the condition that the three-dimensional size of the battery cell is constant, thereby increasing the volume of the protrusion, and further improving the capacity of the battery cell and the space utilization in the battery cell.

[0012] In some embodiments, the number of the first protruding portions and the first extending portions are both plural, and they are arranged one by one. In this way, the plurality of first protruding portions and the plurality of first extending portions are adapted to form a plurality of protrusions, so that the number of the plurality of protrusions is adapted to the number of the protruding portions of the electrode assembly, which improves the adaptability of the protrusions and is beneficial to improve the space utilization in the battery cell.

[0013] In some embodiments, the battery cell further comprises a tab, at least part of the tab is located in the protrusion. In this way, the shape of the space in the shell can be adapted to the arrangement of the protruding portions of the electrode assembly, which reduces the probability of interference between the tab and the first wall portion and the second wall portion, and improves the space utilization of the internal space of the battery cell.

[0014] In some embodiments, the battery cell further comprises an adapter, the adapter is electrically connected to the tab and the pole, and at least part of the adapter is located in the protrusion. In this way, the shape of the space in the shell can be adapted to the arrangement of the protruding portions of the electrode assembly, which reduces the probability of interference between the adapter and the first wall portion and the second wall portion, and improves the space utilization of the internal space of the battery cell.

[0015] In some embodiments, the battery cell further comprises an electrode assembly, the electrode assembly is arranged in the shell and is electrically connected to the pole, and the number of the electrode assembly is one or two. In this way, the protrusion is adapted to the overall outer dimension of the smaller shell, so that in the case that the overall outer contour of the battery cell is smaller, the volume of the battery cell is increased by arranging the protrusion, and the energy density of the battery cell is improved.

[0016] In some embodiments, the shell further comprises a third wall portion, the third wall portion is located on the opposite side of the first wall portion from the second wall portion, the third wall portion comprises a third main body portion and a second extending portion, the first main body portion is connected to the third main body portion, the second extending portion is located on the side of the third main body portion close to the first wall portion, and the first protruding portion is connected to the second extending portion to make the second extending portion form part of the protrusion. In this way, it is beneficial to further increase the size of the protrusion perpendicular to the protruding direction of the protrusion, thereby increasing the volume of the protrusion, and further improving the capacity of the battery cell and the space utilization in the battery cell.

[0017] In some embodiments, the shell further comprises a fourth wall portion, the fourth wall portion comprises a fourth main portion and a third extension portion, the fourth main portion is located at one side of the second main portion and connected, the third extension portion is located at one side of the fourth main portion close to the first wall portion, and the first protrusion portion is connected with the third extension portion so that the third extension portion forms part of the protrusion. In this way, the size of the protrusion perpendicular to the protruding direction of the protrusion is further increased, thereby increasing the volume of the protrusion, and further increasing the capacity of the battery cell and the space utilization in the battery cell.

[0018] In some embodiments, the third extension portion is located at one side of the first extension portion and connected. In this way, the size of the protrusion perpendicular to the protruding direction of the protrusion is further increased, thereby increasing the volume of the protrusion, and further increasing the capacity of the battery cell and the space utilization in the battery cell.

[0019] In some embodiments, the shell further comprises a fifth wall portion, the fifth wall portion is located at one side of the shell away from the first wall portion, the fifth wall portion comprises a fifth main portion and a second protrusion portion, the second wall portion further comprises a fourth extension portion, the fourth extension portion is located at one side of the second main portion close to the fifth wall portion, the fifth main portion is connected with the second main portion, and the second protrusion portion is connected with the first extension portion to form the protrusion on the surface of the shell. In this way, the flexibility of the arrangement of the battery cell in the battery is expanded, and the probability of short circuit caused by accidental contact between the pole columns is reduced due to the increased distance between the pole columns on the protrusion.

[0020] In some embodiments, the outer surface of the second wall portion is the largest surface on the outer surface of the shell. In this way, the protruding direction of the protrusion is not the same direction as the normal direction of the large surface, thereby reducing the probability of interference between the arrangement of the battery cells and other devices in the battery.

[0021] In some embodiments, the number of pole columns is two, and the two pole columns are located on the same protrusion. In this way, only one protrusion is needed to arrange two pole columns, thereby simplifying the manufacturing steps of the shell and reducing the production cost.

[0022] Alternatively, the number of protrusions is two, and the two pole columns are respectively located on one protrusion. In this way, the probability of short circuit caused by electrical connection between the two pole columns is reduced.

[0023] In some embodiments, the protrusion is located at a center position of the first wall portion along a length direction of the first wall portion, so as to facilitate the battery cell to have a symmetrical structure, and facilitate the adjustment of the arrangement direction of the plurality of battery cells in the battery, so as to improve the adaptability of the battery cell; and facilitate the shortening of the distance between the positive pole and the negative pole of two battery cells adjacent to each other, so as to facilitate the electrical connection between different battery cells.

[0024] Alternatively, the protrusion is located at one end of the first wall portion along the length direction of the first wall portion, so as to facilitate the first main body portion to form a large-area complete surface, facilitate the matching arrangement between other devices in the battery and the battery cell, and improve the utilization rate of the space in the battery.

[0025] In some embodiments, the shell comprises a shell body and a cover plate, the shell body is provided with a mounting cavity, one side of the mounting cavity is open, and the cover plate is arranged at the open side of the mounting cavity, and the cover plate is arranged opposite to the first wall portion, so as to facilitate the synchronous preparation of the first wall portion and the second wall portion in the process of preparing the shell body, improve the production efficiency, and reduce the production cost.

[0026] Alternatively, the cover plate forms the second wall portion, so as to facilitate the reduction of the difficulty of forming the first protrusion on the shell body and the difficulty of preparing the second wall portion, reduce the production cost of the shell, and improve the production efficiency.

[0027] In some embodiments, the shell comprises a shell body and a cover plate, the shell body is provided with a mounting cavity, one side of the mounting cavity is open to form a first opening, and the cover plate is arranged at the first opening, and the cover plate forms the first wall portion, so that the stamping direction of the stamping forming the first protrusion is the same as the thickness direction of the cover plate, the difficulty of stamping forming the first protrusion is reduced, the size of the stamping die is reduced, the production cost is reduced, and the production efficiency is improved.

[0028] In some embodiments, the cover plate abuts against the shell body along the covering direction of the cover plate, so as to facilitate the welding from the side perpendicular to the protruding direction of the first protrusion in the welding process, reduce the adjustment of the welding equipment, especially the adjustment of the focal length of the laser welding equipment, and then facilitate the simplification of the welding process steps and the improvement of the production efficiency.

[0029] In some embodiments, the edge of the shell protrudes in the direction of the cover of the cover plate to form a raised edge portion, the first protruding portion protrudes in the direction away from the shell, the first protruding portion is open to one side of the shell to form a second opening, the first protruding portion is open to one side of the second wall portion to form a third opening, the second opening is in communication with the mounting cavity, the first extending portion closes the third opening, and at least part of the raised edge portion forms the first extending portion. In this way, on the one hand, the risk of cracking of the first protruding portion during stamping is reduced, the manufacturing difficulty of the first protruding portion is reduced, and the yield of the cover plate production is improved. On the other hand, even if the size of the cover plate in the opening direction of the third opening is small, it is also convenient to form the first protruding portion, which is beneficial to increase the volume of the protrusion.

[0030] In some embodiments, the first protruding portion is open to opposite sides perpendicular to the cover direction of the cover plate to form two third openings. In this way, the manufacturing difficulty of the first protruding portion is further reduced, the yield of the cover plate production is improved, and it is convenient to stamp the first protruding portion of the cover plate with a small size, which is further beneficial to increase the volume of the protrusion.

[0031] In some embodiments, the first protruding portion is located at at least one end of the first main portion in the first direction, the first protruding portion is open to one side of the first main portion in the first direction to form a fourth opening, the first protruding portion is open to at least one side in the second direction to form the third opening, the cover direction of the cover plate, the first direction and the second direction are perpendicular to each other, the raised edge portion is located at at least one end of the shell in the first direction, and the raised edge portion closes the third opening and the fourth opening to form the protrusion together with the first protruding portion. In this way, the manufacturing process difficulty requirement of the first protruding portion is further reduced, and the volume of the protrusion is further increased when the size of the cover plate is limited.

[0032] In some embodiments, the cover plate abuts the shell in the cover direction thereof, the abutting position of the first main portion and the shell forms a first joint, the abutting position of the first protruding portion and the raised edge portion perpendicular to the cover direction of the cover plate forms a second joint, and the included angle between the extension direction of the first joint and the extension direction of the second joint ranges from 95° to 145°. In this angle range, on the one hand, the size of the raised edge portion in the protruding direction of the first protruding portion is increased within a limited size range, and the volume of the protrusion is increased. On the other hand, the change of the process angle of the welding equipment in the switching process between the welding of the first joint and the second joint is reduced, and the efficiency and quality of the welding work are improved.

[0033] In some embodiments, the second wall portion is located on one side of the first wall portion along the width direction of the first wall portion, and the width dimension of the first wall portion ranges from 10 mm to 60 mm. In this way, on the one hand, the outer contour dimension of the shell is reduced, which facilitates increasing the number of battery cells inside the battery and improving the energy density of the battery; on the other hand, arranging the protrusion in this size range facilitates reducing the difficulty of manufacturing the protrusion.

[0034] In some embodiments, the dimension of the first protruding portion along the protruding direction thereof ranges from 1 mm to 10 mm. In this way, the space inside the protrusion meets the requirement of arranging the protruding portion of the electrode assembly, and meanwhile, the size of the protrusion has less adverse effect on the arrangement of other devices in the battery.

[0035] In some embodiments, the dimension of the first extending portion along the protruding direction of the first protruding portion ranges from 1 mm to 10 mm. In this way, the space inside the protrusion meets the requirement of arranging the protruding portion of the electrode assembly, and meanwhile, the size of the protrusion has less adverse effect on the arrangement of other devices in the battery.

[0036] The embodiments of the present disclosure also provide a battery, which comprises a box body and the battery cell in any of the foregoing embodiments, wherein the box body is provided with an accommodating space, the battery cell is arranged in the accommodating space, one side inner wall of the accommodating space is provided with an accommodating cavity, the accommodating cavity is in communication with the accommodating space, and at least part of the protrusion is accommodated in the accommodating cavity. In this way, the space inside the battery can better adapt to the outer contour of the battery cell, which facilitates improving the utilization rate of the space inside the battery and improving the energy density of the battery.

[0037] In some embodiments, the outer surface of the box body is provided with a boss, and the boss is located on the side of the accommodating cavity away from the accommodating space. In this way, the volume of the accommodating cavity is increased while the outer contour dimension of the battery is reduced, which facilitates increasing the energy density of the battery.

[0038] The embodiments of the present disclosure also provide an electric device, which comprises the battery in any of the foregoing embodiments, and the battery serves as the power supply of the electric device. In this way, the protrusion is formed by the first extending portion and the first protruding portion, which increases the volume of the protrusion of the battery cell in a limited size, and thus facilitates increasing the space utilization rate of the electric device and the capacity of the battery.

[0039] In some embodiments, the power consuming device is a vehicle, and the vehicle further comprises a seat, and the accommodating cavity is located on a side of the box body facing the seat, so as to increase the volume of the battery in the vehicle, thereby increasing the capacity of the battery and the cruising range of the vehicle; meanwhile, the flat wall of the box body is directed towards the ground, so as to make the bottom surface of the vehicle more flat, thereby reducing the wind resistance coefficient of the vehicle and increasing the ground clearance of the vehicle.

[0040] In some embodiments, the outer surface of the box body is provided with a boss, and the boss is located on a side of the accommodating cavity away from the accommodating space, so as to further increase the volume of the accommodating cavity, thereby increasing the capacity of the battery.

[0041] In some embodiments, the power consuming device is a vehicle, and the vehicle further comprises a support plate, and a side surface of the support plate facing the battery monomer is recessed to form a mounting space, and at least part of the pole is located in the mounting space.

[0042] And / or, at least part of the protrusion is located in the mounting space. In this way, the volume of the battery in the vehicle is increased, thereby increasing the capacity of the battery, and at the same time, the support plate can play a shielding and protection role, reducing the adverse effects on personnel or devices in the space on the side of the support plate away from the battery when the battery malfunctions. BRIEF DESCRIPTION OF DRAWINGS

[0043] FIG. 1 is a schematic view of a vehicle using a battery device according to an embodiment of the present disclosure;

[0044] FIG. 2 is an exploded schematic view of a battery according to an embodiment of the present disclosure;

[0045] FIG. 3 is a schematic view of a battery monomer in a first perspective according to a first embodiment of the present disclosure;

[0046] FIG. 4 is a schematic view of the embodiment in FIG. 3 in a second perspective;

[0047] FIG. 5 is a partial enlarged view of position A in FIG. 4;

[0048] FIG. 6 is a schematic view of the embodiment in FIG. 3 in a third perspective;

[0049] FIG. 7 is a partial enlarged view of position B in FIG. 6;

[0050] FIG. 8 is a schematic view of a shell of the embodiment in FIG. 3;

[0051] FIG. 9 is a schematic view of a battery monomer in a fourth perspective according to a second embodiment of the present disclosure;

[0052] FIG. 10 is an exploded schematic view of the embodiment in FIG. 9;

[0053] Fig. 11 is a schematic view of the housing of the embodiment of Fig. 9;

[0054] Fig. 12 is a schematic view of the embodiment of Fig. 9 from a fifth perspective;

[0055] Fig. 13 is a schematic view of a cutaway of the embodiment of Fig. 12 at position D-D;

[0056] Fig. 14 is a schematic view of a partial enlargement of the embodiment of Fig. 13 at position E;

[0057] Fig. 15 is a schematic view of the cover of the embodiment of Fig. 9;

[0058] Fig. 16 is a schematic view of a partial enlargement of the embodiment of Fig. 15 at position F;

[0059] Fig. 17 is a schematic view of the cover of Fig. 15 from another perspective;

[0060] Fig. 18 is a schematic view of a battery cell in a third embodiment of the disclosure;

[0061] Fig. 19 is a schematic view of a partial enlargement of the embodiment of Fig. 18 at position G;

[0062] Fig. 20 is a schematic view of a partial enlargement of the housing of the embodiment of Fig. 18;

[0063] Fig. 21 is a schematic view of a battery cell in a fourth embodiment of the disclosure;

[0064] Fig. 22 is a schematic view of the embodiment of Fig. 19 from another perspective;

[0065] Fig. 23 is a schematic view of a partial enlargement of the embodiment of Fig. 20 at position H;

[0066] Fig. 24 is a schematic view of an exploded view of the embodiment of Fig. 19;

[0067] Fig. 25 is a schematic view of the cover of the embodiment of Fig. 19;

[0068] Fig. 26 is a schematic view of a partial enlargement of the embodiment of Fig. 25 at position I;

[0069] Fig. 27 is a schematic view of a battery cell in a fifth embodiment of the disclosure;

[0070] Fig. 28 is a schematic view of an exploded view of a battery cell in a sixth embodiment of the disclosure;

[0071] Fig. 29 is a schematic view of an exploded view of a battery cell in a seventh embodiment of the disclosure;

[0072] Fig. 30 is a schematic view of a battery in an embodiment of the disclosure;

[0073] Fig. 31 is a schematic view of a cutaway of the embodiment of Fig. 30;

[0074] FIG. 32 is a schematic view of an arrangement of a seat and a battery in a vehicle according to an embodiment of the present disclosure;

[0075] FIG. 33 is a schematic view of an arrangement of a vehicle according to an embodiment of the present disclosure;

[0076] FIG. 34 is a schematic view of a partial enlarged view of a position J in FIG. 33. DETAILED DESCRIPTION

[0077] It should be noted that the embodiments and technical features in the present disclosure and the embodiments can be combined with each other without conflict, and the detailed description in the specific embodiments should be understood as an explanation of the purpose of the present disclosure, and should not be regarded as an improper limitation of the present disclosure.

[0078] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this present disclosure belongs; the terminology used in the specification herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present disclosure; the terms "comprising" and "having," and any variations thereof, as used in the specification and in the claims are intended to cover not exclusively inclusive.

[0079] In the description of the embodiments of the present disclosure, the technical terms "first", "second", "third" and the like are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present disclosure, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0080] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present disclosure. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily independent or alternative embodiments to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0081] In the description of the embodiments of the present disclosure, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents the "or" relationship between the front and rear associated objects.

[0082] In the description of the embodiments of the present disclosure, as shown in FIG. 3, FIG. 10, FIG. 14, FIG. 24, the direction in which the arrow X is located is the "thickness direction of the first wall portion", the "protruding direction of the first protruding portion", the "covering direction of the cover plate", and the "vertical direction"; as shown in FIG. 3, FIG. 25, the direction in which the arrow Y is located is the "first direction" and the "length direction of the first wall portion"; as shown in FIG. 3, FIG. 14, the direction in which the arrow Z is located is the "second direction" and the "width direction of the first wall portion".

[0083] In the description of the embodiments of the present disclosure, unless explicitly specified and limited, the technical terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to the specific circumstances.

[0084] In the description of the embodiments of the present disclosure, unless explicitly specified and limited, the technical term "contacting" should be understood in a broad sense, which can be direct contact or contact through an intermediate medium layer, and can be contact between two objects that have substantially no interaction force, or contact between two objects that have interaction force.

[0085] At present, batteries are increasingly widely used in life and industry. Batteries are not only used in energy storage power supply systems such as hydroelectric, thermal, wind and solar power stations, but also widely used in electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, and in many fields such as aerospace. With the continuous expansion of the application field of batteries, the market demand is also increasing.

[0086] FIG. 2 is a perspective exploded view of a battery 100 provided by an embodiment of the present disclosure. As shown in FIG. 2, the battery 100 includes a box body 20 and at least one battery monomer 10,

[0087] The box body 20 includes a top cover 21 and a bottom cover 22, and the top cover 21 is covered above the bottom cover 22, so as to form a containing space for placing the battery monomer 10 between the bottom cover 22 and the top cover 21.

[0088] In the battery 100, the battery cell 10 can be multiple, and the multiple battery cells 10 can be connected in series or in parallel or in a mixed manner. The mixed manner means that the multiple battery cells 10 are connected in series and in parallel. The multiple battery cells 10 can be directly connected in series or in parallel or in a mixed manner, and then the whole of the multiple battery cells 10 is placed in the accommodating space formed by the bottom cover 22 and the top cover 21. Of course, the battery 100 can also be that the multiple battery cells 10 are first connected in series or in parallel or in a mixed manner to form a battery module, and then the multiple battery modules are connected in series or in parallel or in a mixed manner to form a whole and are accommodated in the accommodating space formed by the bottom cover 22 and the top cover 21. The battery 100 can also include other structures, for example, the battery 100 can also include a current collecting component for realizing the electrical connection between the multiple battery cells 10.

[0089] The battery cell 10 involved in the embodiments of the present disclosure includes an electrode assembly and an electrolyte, and the electrode assembly is composed of a positive electrode sheet, a negative electrode sheet and a separator. The battery cell 10 mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work. The positive electrode sheet includes a positive electrode current collector and a positive electrode active material layer, and the positive electrode active material layer is coated on the surface of the positive electrode current collector. The current collector without the positive electrode active material layer protrudes from the current collector with the positive electrode active material layer, and the current collector without the positive electrode active material layer is laminated as a positive electrode tab. Taking a lithium ion battery as an example, the material of the positive electrode current collector can be aluminum, and the positive electrode active material can be lithium cobaltate, lithium iron phosphate, ternary lithium or lithium manganate, etc. The negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer, and the negative electrode active material layer is coated on the surface of the negative electrode current collector. The current collector without the negative electrode active material layer protrudes from the current collector with the negative electrode active material layer, and the current collector without the negative electrode active material layer is laminated as a negative electrode tab. The material of the negative electrode current collector can be copper, and the negative electrode active material can be carbon or silicon, etc. The material of the separator can be PP (polypropylene) or PE (polyethylene), etc. In addition, the electrode assembly can be a winding type structure or a laminated type structure.

[0090] The battery cell 10 can be a secondary battery, which means that the battery cell 10 can be activated by charging after discharging to continue to be used.

[0091] The battery cell 10 can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead-acid battery, etc., and the embodiments of the present disclosure are not limited thereto.

[0092] The battery cell 10 can be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell, or other shapes, the prismatic battery cell including a square battery cell, a blade battery cell, a multi-prismatic battery cell, for example, a hexagonal battery cell, and the like, and the embodiments of the present disclosure are not particularly limited.

[0093] The battery 100 involved in the embodiments of the present disclosure refers to a single physical module including one or more battery cells 10 to provide higher voltage and capacity.

[0094] The power consuming device involved in the embodiments of the present disclosure is powered by the above-mentioned battery, and the power consuming device can be, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, an electric vehicle, an electric car, a ship, a spacecraft, and the like. Among them, the electric toy can include fixed or mobile electric toys, for example, game consoles, electric car toys, electric ship toys, and electric plane toys, and the like, and the spacecraft can include airplanes, rockets, space shuttles, and spaceships, and the like.

[0095] In the following embodiments, for the convenience of description, the power consuming device of an embodiment of the present disclosure is taken as a vehicle 1000 for example. The following is described in conjunction with the drawings.

[0096] FIG. 1 is a structural schematic diagram of a vehicle 1000 provided by an embodiment of the present disclosure. The vehicle 1000 can be a fuel automobile, a gas automobile, or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid electric automobile, or a range extended automobile, and the like. As shown in FIG. 1, the vehicle 1000 is internally provided with a battery 100, and the battery 100 can be arranged at the bottom, the head, or the tail of the vehicle 1000. The battery 100 can be used for power supply of the vehicle 1000, for example, the battery 100 can be used as an operating power supply of the vehicle 1000. The vehicle 1000 can further include a controller 200 and a motor 300, and the controller 200 is used to control the battery 100 to supply power to the motor 300, for example, to meet the working power demand of the vehicle 1000 during starting, navigation, and driving.

[0097] In some embodiments of the present disclosure, the battery 100 can not only be used as an operating power supply of the vehicle 1000, but also be used as a driving power supply of the vehicle 1000, to replace or partially replace fuel or natural gas to provide driving power for the vehicle 1000.

[0098] The embodiments of the present disclosure are described in detail as follows.

[0099] The battery cell includes a shell, a pole, and an electrode assembly, the shell is internally formed with a space for placing the electrode assembly and storing electrolyte, an electrochemical reaction can occur between the electrolyte and the electrode assembly, the pole passes through the shell, one end of the pole is electrically connected with the electrode assembly, and the other end of the pole is electrically connected with other devices outside the battery cell, so that the battery cell realizes charging and discharging functions.

[0100] The electrode assembly is composed of multiple components, the size, number and shape of each component are not the same, so that the outer contour of the electrode assembly is not regular, and a protrusion is formed on the electrode assembly. In the related art, a protrusion is formed on the outer surface of the battery monomer, by setting the protrusion, the total volume of the battery monomer can be increased, which is beneficial to improve the capacity of the battery monomer; at the same time, it is beneficial to adapt the shape of the space inside the battery monomer to the shape of the electrode assembly, and improve the space utilization rate inside the battery monomer.

[0101] Affected by the increasing requirement of battery energy density, in order to make the pole piece in the electrode assembly be made by the lamination process, the outer contour of the battery monomer is gradually lengthened and thinned, so that the wall surface on the surface of the battery monomer which can be used to form the protrusion is more and more long and narrow, so that the space and size of the protrusion are not conducive to arranging the pole column.

[0102] Based on the above problems, the embodiment of the present disclosure provides a battery monomer, at least one side surface of the protrusion perpendicular to the protrusion direction of the protrusion is formed by the outer surface of one wall part of the battery monomer, thereby facilitating the formation of increasing the size of the protrusion.

[0103] Specifically, referring to FIGS. 3-5, the embodiment of the present disclosure provides a battery monomer 10 for use in a battery 100, the battery monomer 10 comprising a housing 11 and a pole column 12.

[0104] The housing 11 comprises a first wall part 111 and a second wall part 112, the first wall part 111 is arranged adjacent to the second wall part 112, the first wall part 111 comprises a first main body part 1111 and a first protruding part 1112, the first protruding part 1112 protrudes from the outer surface of the first main body part 1111 along the thickness direction of the first wall part 111; the second wall part 112 comprises a second main body part 1121 and a first extension part 1122, the first extension part 1122 is located on the side of the second main body part 1121 close to the first wall part 111, the first main body part 1111 is connected with the second main body part 1121, and the first protruding part 1112 is connected with the first extension part 1122 to form a protrusion 10a on the surface of the housing 11, and the pole column 12 is arranged in the protrusion 10a.

[0105] The housing 11 and the pole column 12 jointly form the appearance surface of the battery monomer 10, and part of the pole column 12 penetrates through the housing 11 and extends into the internal space of the housing 11.

[0106] The wall part is the solid structure forming each outer contour surface of the housing 11.

[0107] It should be noted that one wall portion can be formed by multiple single parts in the housing 11, which are assembled together to form one outer contour surface; or can be formed by one single part, one surface of which forms one outer contour surface of the housing 11. In addition, one single part in the housing 11 can form multiple wall portions, that is, multiple surfaces of the single part respectively form one outer contour surface of the housing 11.

[0108] The first wall portion 111 and the second wall portion 112 are adjacent to each other, that is, part of the edge of the first wall portion 111 and part of the edge of the second wall portion 112 are connected to each other.

[0109] The outer surface of the first main portion 1111 is a complete plane.

[0110] The thickness direction of the first wall portion 111, that is, the normal direction of the outer contour surface of the outer surface of the first main portion 1111.

[0111] The first extension portion 1122 is located at the edge of the second main portion 1121 close to the first wall portion 111, so that the first extension portion 1122 forms the protruding part of the second wall portion 112.

[0112] The first main portion 1111 and the second main portion 1121 are connected, that is, part of the first main portion 1111 and part of the second main portion 1121 respectively form the part where the first wall portion 111 and the second wall portion 112 are connected to each other.

[0113] The first protruding portion 1112 and the first extension portion 1122 together form the protrusion 10a of the surface of the housing 11, that is, part of the surface of the protrusion 10a is the outer surface of the first protruding portion 1112, and the other part is the outer surface of the first extension.

[0114] It can be understood that at least part of the first protruding portion 1112 forms the edge of the first wall portion 111 close to the second wall portion 112, so as to be connected with the first extension portion 1122. That is, the protrusion 10a extends to the edge of the first main portion 1111.

[0115] The pole 12 is used to electrically connect the electrode assembly 18 inside the housing 11 and other devices outside the battery monomer 10.

[0116] The battery cell 10 in the embodiments of the present disclosure, by forming the protrusion 10a on the surface of the shell 11 by the respective part of the two different wall portions, is conducive to increasing the size of the protrusion 10a in the thickness direction of the second wall portion 112 under the condition that the three-dimensional size of the battery cell 10 is constant, thereby being conducive to increasing the volume of the protrusion 10a, and further being conducive to improving the capacity of the battery cell 10 and improving the space utilization in the battery cell 10. Even in the case that the size of the battery cell 10 is small, the protrusion 10a can also be arranged.

[0117] The specific position of the pole column 12 on the protrusion 10a is not limited. For example, referring to FIGS. 3, 4 and 5, the pole column 12 is arranged on the end surface of the protrusion 10a in the protruding direction thereof; or for example, the pole column 12 is arranged on the side surface of the protrusion 10a perpendicular to the protruding direction thereof.

[0118] It can be understood that the protruding direction of the first protruding portion 1112 and the protruding direction of the first extending portion 1122 relative to the second main body portion 1121 can be the same direction, or can form a certain angle with each other.

[0119] It can be understood that the angle between the outer surface of the second main body portion 1121 and the outer surface of the first extending portion 1122 has a direct impact on the size of the volume of the protrusion 10a.

[0120] In some embodiments, referring to FIGS. 3 and 5, the outer surface of the second main body portion 1121 and the outer surface of the first extending portion 1122 are flush, that is, the outer surfaces of the two form an integral outer surface of the second wall portion 112.

[0121] In this way, it is conducive to increasing the volume of the protrusion 10a while making the outer surface of the second wall portion 112 flat, facilitating the arrangement of the battery cell 10 through the second wall portion 112 and other battery cells 10 or other devices in the battery 100, and being conducive to optimizing the arrangement of the devices inside the battery 100 and improving the space utilization in the battery 100.

[0122] The specific number of the first protruding portion 1112 and the first extending portion 1122 is not limited, which can be one or multiple.

[0123] In some embodiments, referring to FIGS. 3 and 8, the number of the first protruding portion 1112 and the first extending portion 1122 is multiple, and they are arranged one by one. That is, each protrusion 10a is formed by one first protruding portion 1112 and one first extending portion 1122.

[0124] In this way, the plurality of first protruding portions 1112 and the plurality of first extending portions 1122 are respectively adapted to form the plurality of protrusions 10a, so that the number of the plurality of protrusions 10a is adapted to the number of the protruding portions of the electrode assembly 18, improving the adaptability of the protrusions 10a and facilitating the space utilization inside the battery monomer 10.

[0125] The electrode assembly 18 includes the tab 14 and the lug 13, the lug 13 is arranged on one side of the tab 14, so that the lug 13 forms the protruding portion of the electrode assembly 18. The tab 14 is used to generate an electrochemical reaction with the electrolyte in the battery monomer 10, and the lug 13 is used for electrical connection of the pole 12, so as to realize the conduction of electric energy between the tab 14 and the pole 12.

[0126] The specific components of the electrode assembly 18 located in the protrusion 10a are not limited.

[0127] In some embodiments, referring to FIGS. 10, 13 and 14, the battery monomer 10 further includes the lug 13, at least part of the lug 13 is located in the protrusion 10a.

[0128] In this way, it is beneficial to adapt the shape of the space in the shell 11 to the arrangement of the protruding portion of the electrode assembly 18, reduce the probability of interference between the lug 13 and the first wall portion 111 and the second wall portion 112, and improve the space utilization of the space inside the battery monomer 10.

[0129] In some embodiments, referring to FIG. 14, the battery monomer 10 further includes the adapter 17, the adapter 17 electrically connects the lug 13 and the pole 12, and at least part of the adapter 17 is located in the protrusion 10a.

[0130] By connecting the lug 13 and the pole 12 through the adapter 17, it is beneficial to realize the electrical connection requirement of the lug 13 and the pole 12 of different sizes in the protrusion 10a of different sizes; at the same time, it is beneficial to adapt the shape of the space in the shell 11 to the arrangement of the protruding portion of the electrode assembly 18, reduce the probability of interference between the adapter 17 and the first wall portion 111 and the second wall portion 112, and improve the space utilization of the space inside the battery monomer 10.

[0131] The specific number of the electrode assembly 18 is not limited.

[0132] It can be understood that the fewer the number of the electrode assembly 18 is, the smaller the size of the shell 11 is.

[0133] In the embodiments provided with the electrode assembly 18, referring to FIGS. 10 and 24, the electrode assembly 18 is arranged in the shell 11 and electrically connected with the pole 12, and the number of the electrode assembly 18 is one or two.

[0134] The number of the electrode assembly 18 is one or two, which makes the overall outer contour of the case 11 thinner, and thus is beneficial to improve the energy density of the battery monomer 10.

[0135] In this way, the protrusion 10a is adapted to the overall outer contour of the smaller case 11, so that in the case that the overall outer contour of the battery monomer 10 is smaller, the volume of the battery monomer 10 is increased by arranging the protrusion 10a, and the energy density of the battery monomer 10 is improved.

[0136] It can be understood that the protrusion 10a can extend to the edges of the first wall portion 111 in multiple directions perpendicular to the protruding direction of the protrusion 10a, so as to further increase the size of the protrusion 10a.

[0137] In some embodiments, referring to FIGS. 9-14, the case 11 further includes a third wall portion 113 located on the opposite side of the first wall portion 111 from the second wall portion 112, and the third wall portion 113 includes a third main body portion 1131 and a second extension portion 1132. The first main body portion 1111 is connected to the third main body portion 1131, and the second extension portion 1132 is located on the side of the third main body portion 1131 close to the first wall portion 111. The first protrusion portion 1112 is connected to the second extension portion 1132 so that the second extension portion 1132 forms part of the protrusion 10a.

[0138] That is, the first protrusion portion 1112, the first extension portion 1122, and the second extension portion 1132 jointly form the protrusion 10a. The first protrusion portion 1112 extends to the edges of the first wall portion 111 on the opposite sides.

[0139] The second extension portion 1132 is located on the edge of the third main body portion 1131 close to the first wall portion 111, so that the second extension portion 1132 forms a protruding part of the second wall portion 112.

[0140] The first main body portion 1111 is connected to the third main body portion 1131, that is, a part of the first main body portion 1111 and a part of the third main body portion 1131 each form a part at which the first wall portion 111 and the third wall portion 113 are connected to each other.

[0141] In this way, it is beneficial to further increase the size of the protrusion 10a perpendicular to the protruding direction of the protrusion 10a, so as to increase the volume of the protrusion 10a, and thus improve the capacity of the battery monomer 10 and improve the space utilization in the battery monomer 10.

[0142] The specific arrangement positions of the first extension portion 1122 and the second extension portion 1132 are not limited.

[0143] For example, referring to FIG. 11 and FIG. 14, the first extension 1122 and the second extension 1132 are oppositely arranged along the width direction of the first wall 111.

[0144] The width direction of the first wall 111 refers to the direction of the smaller dimension of the two dimensions perpendicular to the thickness direction of the first wall 111.

[0145] Oppositely arranged refers to the projection of the first extension 1122 at least partially overlaps with the projection of the second extension 1132 in the projection plane perpendicular to the width direction of the first wall 111.

[0146] In this way, the shape of the protrusion 10a is more regular, which facilitates the cooperation of the battery monomer 10 with other devices in the battery 100.

[0147] It can be understood that the shape and size of the first extension 1122 and the second extension 1132 can be the same or different.

[0148] In some embodiments, referring to FIG. 12, the projection of the first extension 1122 completely overlaps with the projection of the second extension 1132 in the projection plane perpendicular to the width direction of the first wall 111.

[0149] In this way, the manufacturing process of the shell 11 is simplified, and the first protrusion 1112 synchronously connects the first extension 1122 and the second extension 1132.

[0150] It can be understood that the size of the included angle between the outer surface of the second main body 1121 and the outer surface of the first extension 1122 directly affects the volume of the protrusion 10a.

[0151] In some embodiments, the outer surface of the third main body 1131 and the outer surface of the second extension 1132 are flush, that is, the outer surfaces of the two form an integral outer surface of the third wall 113.

[0152] In this way, the volume of the protrusion 10a is increased, and the outer surface of the third wall 113 is flat, which facilitates the cooperation of the battery monomer 10 with other battery monomers 10 or other devices in the battery 100 through the third wall 113, optimizes the arrangement of devices inside the battery 100, and improves the space utilization rate inside the battery 100. At the same time, it is also beneficial to reduce the probability of installation interference between the part of the electrode assembly 18 in the protrusion 10a, such as the tab 13 and the adapter 17, and the third wall 113.

[0153] In some embodiments, referring to FIGS. 18-24, the shell 11 further comprises a fourth wall portion 114 comprising a fourth main portion 1141 located at one side of the second main portion 1121 and connected thereto, and a third extension portion 1142 located at one side of the fourth main portion 1141 close to the first wall portion 111, the first protrusion portion 1112 being connected to the third extension portion 1142 so that the third extension portion 1142 forms part of the protrusion 10a.

[0154] That is, the first protrusion portion 1112, the first extension portion 1122 and the third extension portion 1142 jointly form the protrusion 10a.

[0155] The third extension portion 1142 is located at an edge of the fourth main portion 1141 close to the first wall portion 111, so that the third extension portion 1142 forms a protruding part of the fourth wall portion 114.

[0156] The first main portion 1111 is connected to the fourth main portion 1141, that is, a part of the first main portion 1111 and a part of the fourth main portion 1141 each form a part at which the first wall portion 111 and the fourth wall portion 114 are connected to each other.

[0157] In this way, the size of the protrusion 10a perpendicular to the protruding direction thereof is further increased, so that the volume of the protrusion 10a is increased, which is conducive to increasing the capacity of the battery monomer 10 and improving the space utilization in the battery monomer 10.

[0158] In some embodiments, referring to FIGS. 19 and 23, the third extension portion 1142 is located at one side of the first extension portion 1122 and connected thereto.

[0159] That is, any two of the first extension portion 1122, the first protrusion portion 1112 and the third extension portion 1142 are connected.

[0160] In this way, the size of the protrusion 10a perpendicular to the protruding direction thereof is further increased, so that the volume of the protrusion 10a is increased, which is conducive to increasing the capacity of the battery monomer 10 and improving the space utilization in the battery monomer 10.

[0161] In some embodiments, referring to FIGS. 22 and 23, the third extension portion 1142 is connected between the first extension portion 1122 and the second extension portion 1132, so that the first protrusion portion 1112, the first extension portion 1122, the second extension portion 1132 and the third extension portion 1142 jointly form the protrusion 10a. In this way, the size of the protrusion 10a perpendicular to the protruding direction thereof is further increased, so that the volume of the protrusion 10a is increased, which is conducive to increasing the capacity of the battery monomer 10 and improving the space utilization in the battery monomer 10.

[0162] In some embodiments, referring to FIG. 27, the shell 11 further comprises a fifth wall portion 115 located on the side of the shell 11 away from the first wall portion 111, the fifth wall portion 115 comprising a fifth main body portion 1151 and a second protruding portion 1152, the second wall portion 112 further comprising a fourth extending portion 1123 located on the side of the second main body portion 1121 close to the fifth wall portion 115, the fifth main body portion 1151 connected to the second main body portion 1121, and the second protruding portion 1152 connected to the first extending portion 1122 to form a protrusion 10a on the surface of the shell 11.

[0163] That is, the protrusion 10a formed by the fifth wall portion 115 and the second wall portion 112 is located on the opposite side of the protrusion 10a formed by the first wall portion 111 and the second wall portion 112.

[0164] In this way, the flexibility of the arrangement of the battery monomer 10 in the battery 100 is improved, and the probability of short circuit caused by accidental contact between the pole columns 12 is reduced due to the increased distance between the pole columns 12 on the protrusion 10a.

[0165] It can be understood that the appearance parameters such as the shape and size of the second protruding portion 1152 can be completely consistent with, partially consistent with, or completely different from the appearance parameters of the first protruding portion 1112.

[0166] A plurality of battery monomers 10 can be arranged in the battery 100, and at least part of the battery monomers 10 are arranged along the normal direction of the large face to improve the utilization of the space inside the battery 100.

[0167] The protruding direction of the protrusion 10a is adapted to the arrangement of the battery monomer 10.

[0168] In some embodiments, referring to FIGS. 4 and 6, the outer surface of the second wall portion 112 is the largest face on the outer surface of the shell 11. That is, the outer surface of the second wall portion 112 forms the large face of the battery monomer 10.

[0169] In this way, the protruding direction of the protrusion 10a is not the same direction as the normal direction of the large face, and the probability of interference between the arrangement of the battery monomers 10 and other devices in the battery 100 is reduced.

[0170] It can be understood that the number of pole columns 12 on the battery monomer 10 can be multiple, and part of the pole columns 12 are positive poles and the other part of the pole columns 12 are negative poles.

[0171] In some embodiments, referring to FIG. 28, the number of pole columns 12 is two, and the two pole columns 12 are located on the same protrusion 10a.

[0172] In this way, only one protrusion 10a is needed to arrange two pole columns 12, which is conducive to simplifying the manufacturing steps of the shell 11 and reducing production costs.

[0173] It can be understood that the two pole columns 12 are arranged at intervals to reduce the probability of electrical connection between the two pole columns 12 and cause short circuit.

[0174] In some embodiments, referring to FIGS. 3, 6, 9 and 21, the number of pole columns 12 and the number of protrusions 10a are both two, and the two pole columns 12 are respectively located on one protrusion 10a. That is, the two pole columns 12 are located on different protrusions 10a.

[0175] In this way, it is conducive to reducing the probability of electrical connection between the two pole columns 12 and causing short circuit.

[0176] The specific position of the protrusion 10a on the first wall portion 111 is not limited.

[0177] In some embodiments, referring to FIG. 28, the protrusion 10a is located at the central position of the first wall portion 111 along the length direction of the first wall portion 111.

[0178] That is, the central position of the protrusion 10a along the length direction of the first wall portion 111 coincides with the central position of the first wall portion 111 along the length direction of the first wall portion 111.

[0179] The length direction of the first wall portion 111 refers to the direction of a straight line along which the larger dimension of the two dimensions perpendicular to the thickness direction of the first wall portion 111 is located.

[0180] In this way, it is conducive to making the outer contour of the battery monomer 10 have a symmetrical structure, adjusting the placement direction when arranging multiple battery monomers 10 in the battery 100, and improving the adaptability of the battery monomer 10; it is conducive to shortening the distance between the positive pole column 12 and the negative pole column 12 between two battery monomers 10 adjacent to each other, and facilitating electrical connection between different battery monomers 10.

[0181] In some embodiments, referring to FIGS. 3 and 9, the protrusion 10a is located at one end of the first wall portion 111 along the length direction of the first wall portion 111.

[0182] In this way, it is conducive to making the first main body portion 1111 form a complete surface with a larger area, facilitating the matching arrangement between other devices in the battery 100 and the battery monomer 10, and improving the utilization rate of the space in the battery 100.

[0183] It can be understood that the shell 11 is formed by connecting multiple different parts to each other so as to place the electrode group in the shell 11.

[0184] For example, referring to FIG. 10, FIG. 24, FIG. 28 and FIG. 29, the shell 11 comprises the casing 15 and the cover plate 16, the casing 15 is provided with the mounting cavity 15a, one side of the mounting cavity 15a is open, and the cover plate 16 is arranged at the open side of the mounting cavity 15a.

[0185] After the electrode assembly 18 is placed into the mounting cavity 15a through the open side of the mounting cavity 15a, the cover plate 16 is buckled to the open side of the mounting cavity 15a, and the cover plate 16 is sealed and connected with the shell 11, so that the electrode assembly 18 is stably located in the mounting cavity 15a.

[0186] The casing 15 and the cover plate 16 are not limited to the corresponding relationship with the first wall part 111 and the second wall part 112, respectively.

[0187] For example, referring to FIG. 28, the cover plate 16 and the first wall part 111 are oppositely arranged.

[0188] That is, the first wall part 111 and the second wall part 112 are both located on the casing 15.

[0189] In this way, it is convenient to synchronously manufacture the formed first wall part 111 and the second wall part 112 in the process of manufacturing the casing 15, which is beneficial to improve the production efficiency and reduce the production cost.

[0190] For example, referring to FIG. 29, the cover plate 16 forms the second wall part 112.

[0191] That is, one side of the first protruding part 1112 is open to form part of the open side of the mounting cavity 15a. The cover plate 16 is arranged at the open side of the first protruding part 1112 to close the first protruding part 1112, thereby forming the closed protrusion 10a.

[0192] In this way, it is beneficial to reduce the difficulty of forming the first protruding part 1112 on the casing 15 and the difficulty of manufacturing the second wall part 112, which is beneficial to reduce the production cost of the shell 11 and improve the production efficiency.

[0193] For another example, referring to FIG. 10, FIG. 14 and FIG. 24, the cover plate 16 forms the first wall part 111.

[0194] It can be understood that the size of the cover plate 16 is smaller than the size of the casing 15.

[0195] In this way, the stamping direction of the stamping forming the first protruding part 1112 is the same as the thickness direction of the cover plate 16, which reduces the difficulty of stamping forming the first protruding part 1112, is beneficial to reduce the size of the stamping die, reduce the production cost and improve the production efficiency.

[0196] The shell 15 and the cover plate 16 are connected by laser welding. During the laser welding, the deviation between the welding gap between the shell 15 and the cover plate 16 and the focal length of the lens of the laser welding equipment affects the welding quality. Therefore, the arrangement between the shell 15 and the cover plate 16 directly affects the welding quality between the shell 15 and the cover plate 16.

[0197] For example, referring to FIG. 14, the cover plate 16 abuts the shell 15 along the covering direction of the cover plate 16.

[0198] It can be understood that the joint of the connecting position between the cover plate 16 and the shell 15 is close to one end of the outer surface of the shell 11, which is the position that needs to be laser welded. During the welding process, the lens of the laser welding equipment needs to move along the extension direction of the joint so that the focal point of the lens is located at the end of the joint close to the outer surface of the shell 11.

[0199] That is, the joint of the connecting position between the cover plate 16 and the shell 15 does not fluctuate along the protruding direction of the first protruding portion 1112, but can extend in a plane perpendicular to the protruding direction of the first protruding portion 1112,

[0200] In this way, it is beneficial to weld from the side perpendicular to the protruding direction of the first protruding portion 1112 during the welding process, which can reduce the adjustment of the welding equipment, especially the adjustment of the focal length of the laser welding equipment, thereby facilitating the simplification of the welding process steps and improving the production efficiency.

[0201] The specific manner in which the first extending portion 1122 and the first protruding portion 1112 cooperate between the cover plate 16 and the shell 15 is not limited.

[0202] For example, referring to FIGS. 11, 15, 16 and 17, the edge of the shell 15 protrudes along the covering direction of the cover plate 16 to form a beveled portion 151, the first protruding portion 1112 protrudes away from the shell 15, the side of the first protruding portion 1112 facing the shell 15 is open to form a second opening 16b, the side of the first protruding portion 1112 facing the second wall portion 112 is open to form a third opening 16c, the second opening 16b communicates with the mounting cavity 15a, the first extending portion 1122 closes the third opening 16c, and at least part of the beveled portion 151 forms the first extending portion 1122.

[0203] It can be understood that, in the process of stamping the cover plate 16, the first part of the first protruding part 1112 will form an end face along the stamping direction, and the other part will be stretched and bent to form a folded edge connecting the first part and the first main body part 1111 under the action of the stamping force. In the case of small size of the cover plate 16, for example, the size of the cover plate 16 in the width direction is small, the edge of the cover plate 16 is close to the folded edge, and it is easy to cause the problem that the folded edge is difficult to form, the folded edge is cracked due to stress concentration in the stamping process, and the like,

[0204] And the flange part 151 forms the third opening 16c, that is, in the operation of stamping the first protruding part 1112, the part of the first protruding part 1112 close to the second wall part 112 of the shell 15 does not need to be bent to form a folded edge.

[0205] In this way, on the one hand, the risk of cracking of the first protruding part 1112 in the stamping process is reduced, the manufacturing difficulty of the first protruding part 1112 is reduced, and the yield of the cover plate 16 is improved. On the other hand, even in the case that the size of the cover plate 16 along the opening direction of the third opening 16c is small, it is convenient to form the first protruding part 1112, which is conducive to increasing the volume of the first protruding part 1112, and further conducive to increasing the volume of the protrusion 10a.

[0206] It can be understood that part of the shell 15 facilitates the formation of the flange part 151.

[0207] It can be understood that the first protruding part 1112 is provided with a avoiding space 16a, the avoiding space 16a is communicated with the first opening 15b through the second opening 16b, and further communicated with the mounting cavity 15a, so that part of the electrode assembly 18 can extend into the avoiding space 16a.

[0208] In some embodiments in which the cover plate 16 abuts against the shell 15 along the cover setting direction, the flange part 151 abuts against the inner wall of the avoiding space 16a, so that the position of the third opening 16c forms a welding position.

[0209] It can be understood that the opening direction of the second opening 16b is opposite to the stamping direction of the cover plate 16.

[0210] It can be understood that part of the electrode assembly 18, for example, the tab 13, extends into the avoiding space 16a through the second opening 16b.

[0211] In some embodiments, the second opening 16b is communicated with the third opening 16c, so as to reduce the probability of interference between the electrode assembly 18 extending into the avoiding space 16a and the cover plate 16, and is conducive to increasing the volume in the protrusion 10a.

[0212] In some embodiments, the third opening 16c is open in the width direction of the first wall portion 111, so as to form the protrusion 10a on the thin battery cell 10.

[0213] In some embodiments, referring to Figs. 15, 16, 25 and 26, the first protruding portion 1112 is open along opposite sides perpendicular to the covering direction of the cover plate 16, so as to form two third openings 16c.

[0214] That is, the first protruding portion 1112 does not need to form a flange along opposite sides perpendicular to the covering direction of the cover plate 16 in the stamping process, so the size of the punch in the stamping process along the direction opposite to the two third openings 16c can be no less than the size of the first protruding portion 1112 along the direction.

[0215] In this way, the manufacturing difficulty of the first protruding portion 1112 is further reduced, which is conducive to improving the yield of the cover plate 16; and the cover plate 16 with a smaller size can be stamped to form the first protruding portion 1112, which is further conducive to increasing the volume of the protrusion 10a.

[0216] It can be understood that in the embodiments provided with the second extending portion 1132, the flange portion 151 closing one of the third openings 16c forms the first extending portion 1122, and the flange portion 151 closing the other third opening 16c forms the second extending portion 1132.

[0217] In some embodiments, referring to Figs. 25 and 26, the first protruding portion 1112 is located at at least one end of the first main body portion 1111 along a first direction, the first protruding portion 1112 is open along a side of the first main body portion 1111 away from the first protruding portion 1112 along the first direction to form a fourth opening 16d, the first protruding portion 1112 is open along at least one side of the first protruding portion 1112 along a second direction to form a third opening 16c, the covering direction of the cover plate 16, the first direction and the second direction are perpendicular to each other, the flange portion 151 is located at at least one end of the shell 15 along the first direction, and the flange portion 151 closes the third opening 16c and the fourth opening 16d to form the protrusion 10a together with the first protruding portion 1112.

[0218] That is, the edge of the first protruding portion 1112 close to the first main body portion 1111 along the first direction is completely connected with the main body, and the first protruding portion 1112 is at least partially connected with the flange portion 151 on the shell 15 along other directions.

[0219] In this way, the manufacturing process difficulty requirement of the first protruding portion 1112 is further reduced, and meanwhile, the volume of the avoiding space 16a is further increased under the condition that the size of the cover plate 16 is limited.

[0220] In some embodiments in which the avoidance space 16a forms two third openings 16c, referring to FIG. 25 and FIG. 26, any two of the second opening 16b, the third opening 16c and the fourth opening 16d are in communication with each other, the convex edge portion 151 is located at one end of the shell 15 along the first direction, and is bent twice along the first direction, the second direction and the first direction in turn, and is turned around to form a part of the accommodating cavity 20b. In this way, during the stamping manufacturing of the cover plate 16, only one end of the raw material needs to be stamped and bent to form the first protruding portion 1112, which further reduces the probability of interference between the electrode assembly 18 extending into the avoidance space 16a and the cover plate 16, and is conducive to further improving the volume in the protrusion 10a.

[0221] It can be understood that, during the welding of the cover plate 16 and the shell 15, the turning range of the welding equipment during movement directly affects the welding quality and the efficiency of the welding operation.

[0222] In some embodiments in which the cover plate 16 abuts against the shell 15 along the covering direction thereof, referring to FIG. 7, the abutting position of the first main body portion 1111 and the shell 15 forms a first joint 10b, the abutting position of the first protruding portion 1112 and the convex edge portion 151 perpendicular to the covering direction of the cover plate 16 forms a second joint 10c, and the included angle between the extension direction of the first joint 10b and the extension direction of the second joint 10c ranges from 95° to 145°. That is, 95°≤D1≤145°.

[0223] It can be understood that the extension direction of the first joint 10b and the extension direction of the second joint 10c are both the advancing direction of the welding equipment during the welding operation.

[0224] In this way, within this included angle range, on the one hand, it is conducive to increasing the size of the convex edge portion 151 along the protrusion 10a direction of the first protruding portion 1112 within a limited size range, and is conducive to increasing the volume of the protrusion 10a; on the other hand, it is conducive to reducing the change in the process angle of the welding equipment during switching between welding the first joint 10b and the second joint 10c, and is conducive to improving the efficiency of the welding operation and the welding quality.

[0225] The specific angle value of the included angle between the extension direction of the first joint 10b and the extension direction of the second joint 10c is not limited, for example, 95°, 105°, 115°, 125°, 135°, 145°, etc.

[0226] In some embodiments, the abutting position between one end of the convex edge portion 151 along the protruding direction of the first protruding portion 1112 and the first protruding portion 1112 forms a third joint 10d, and the extension direction of the third joint 10d is parallel to the extension direction of the first joint 10b. In this way, it is conducive to reducing the change in the advancing direction of the welding equipment during welding.

[0227] In some embodiments, referring to FIG. 14, the second wall portion 112 is located at one side of the first wall portion 111 along the width direction of the first wall portion 111, and the width dimension of the first wall portion 111 ranges from 10 mm to 60 mm. That is, 10 mm≤W1≤60 mm.

[0228] In this way, on the one hand, the outer contour dimension of the shell 11 is smaller, which is conducive to increasing the number of battery monomers 10 inside the battery 100 and improving the energy density of the battery 100. On the other hand, arranging the protrusion 10a in this size range is conducive to reducing the difficulty of manufacturing the protrusion 10a.

[0229] The specific value of the width dimension of the first wall portion 111 is not limited, for example, 10 mm, 20 mm, 30 mm, 40 mm, 50 mm, 60 mm, etc.

[0230] In some embodiments, referring to FIGS. 6 and 7, the dimension of the first protruding portion 1112 along the protruding direction thereof ranges from 1 mm to 10 mm, that is, 1 mm≤H1≤10 mm.

[0231] In this way, the space inside the protrusion 10a meets the requirement of arranging the protruding part of the electrode assembly 18, and at the same time, the size of the protrusion 10a has less adverse effect on the arrangement of other devices in the battery 100.

[0232] The specific dimension of the first protruding portion 1112 along the protruding direction thereof can be 1 mm, 2 mm, 3 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, etc.

[0233] The method of measuring the dimension of the first protruding portion 1112 along the protruding direction thereof is not limited. For example, the end surface of the base of the depth vernier caliper is abutted against the end surface of the first protruding portion 1112 along the protruding direction thereof, the scale is extended until the end surface of the scale abuts against the outer surface of the first main body portion 1111, and the reading of the depth vernier caliper is read to obtain the dimension of the first protruding portion 1112 along the protruding direction thereof.

[0234] In some embodiments, referring to FIGS. 6 and 7, the dimension of the first extending portion 1122 along the protruding direction of the first protruding portion 1112 ranges from 1 mm to 10 mm, that is, 1 mm≤H2≤10 mm.

[0235] In this way, the space inside the protrusion 10a meets the requirement of arranging the protruding part of the electrode assembly 18, and at the same time, the size of the protrusion 10a has less adverse effect on the arrangement of other devices in the battery 100.

[0236] The specific dimension of the first extension portion 1122 in the protruding direction of the first protruding portion 1112 can be 1 mm, 2 mm, 3 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, etc.

[0237] The method of measuring the dimension of the first extension portion 1122 in the protruding direction of the first protruding portion 1112 is not limited. For example, the end surface of the base of the depth vernier caliper is abutted against the end surface of the first extension portion 1122 in the protruding direction of the first protruding portion 1112, the scale is extended until the end surface of the scale abuts against the end surface of the second main body portion 1121 in the protruding direction of the first protruding portion 1112, and the reading of the depth vernier caliper is read to obtain the dimension of the first extension portion 1122 in the protruding direction of the first protruding portion 1112.

[0238] The battery cell 10 in one specific embodiment of the present disclosure is described as follows:

[0239] The battery cell 10 comprises a shell 11, a pole 12, an adapter 17 and an electrode assembly 18. The shell 11 comprises a first wall part 111, a second wall part 112, a third wall part 113 and a fourth wall part 114. The first wall part 111 is arranged adjacent to the second wall part 112. The first wall part 111 comprises a first main body part 1111 and a first protruding part 1112. The first protruding part 1112 protrudes from the outer surface of the first main body part 1111 in the thickness direction of the first wall part 111. The second wall part 112 comprises a second main body part 1121 and a first extending part 1122. The first extending part 1122 is located on the side of the second main body part 1121 close to the first wall part 111. The first main body part 1111 is connected to the second main body part 1121. The third wall part 113 is located on one side of the first wall part 111. The third wall part 113 comprises a third main body part 1131 and a second extending part 1132. The first main body part 1111 is connected to the third main body part 1131. The second extending part 1132 is located on the side of the third main body part 1131 close to the first wall part 111. The fourth wall part 114 comprises a fourth main body part 1141 and a third extending part 1142. The fourth main body part 1141 is located on one side of the second main body part 1121 and is connected. The third extending part 1142 is located on the side of the fourth main body part 1141 close to the first wall part 111. The third extending part 1142 is located on one side of the first extending part 1122 and is connected. The first protruding part 1112 is connected to the first extending part 1122, the second extending part 1132 and the third extending part 1142 to form a protrusion 10a on the surface of the shell 11. The shell 11 comprises a shell body 15 and a cover plate 16. The shell body 15 is provided with a mounting cavity 15a. One side of the mounting cavity 15a is open to form a first opening 15b. The cover plate 16 is arranged on the first opening 15b. The cover plate 16 forms the first wall part 111. The cover plate 16 abuts the shell body 15 in the direction in which it is arranged. The edge of a part of the first opening 15b protrudes in the direction in which the cover plate 16 is arranged to form a protruding edge part 151. The first protruding part 1112 protrudes away from the first opening 15b. The first protruding part 1112 is provided with a clearance space 16a. The clearance space 16a is open on the side facing the shell body 15 to form a second opening 16b and is open on at least one side perpendicular to the arrangement direction of the cover plate 16 to form a third opening 16c. The second opening 16b communicates with the mounting cavity 15a. The opposite sides of the clearance space 16a perpendicular to the arrangement direction of the cover plate 16 are both open to form two third openings 16c. The first protruding part 1112 is located on at least one end of the first main body part 1111 in a first direction. The clearance space 16a is open on the side away from the first main body part 1111 in the first direction to form a fourth opening 16d. The clearance space 16a is open on at least one side in a second direction to form a third opening 16c. The arrangement direction of the cover plate 16, the first direction and the second direction are perpendicular to each other. The protruding edge part 151 is located on at least one end of the shell body 15 in the first direction.The convex edge portion 151 encloses the third opening 16c and the fourth opening 16d to jointly form the protrusion 10a with the convex edge portion 151, any two of the second opening 16b, the third opening 16c and the fourth opening 16d are in communication with each other, at least part of the convex edge portion 151 forms the first extension portion 1122, the second extension portion 1132 and the third extension portion 1142, the abutting position of the first main body portion 1111 and the shell 15 forms the first joint 10b, the abutting position of the first protruding portion 1112 and the convex edge portion 151 forms the second joint 10c in the direction perpendicular to the cover setting direction of the cover plate 16, the included angle between the extension direction of the first joint 10b and the extension direction of the second joint 10c ranges from 95° to 145°, the second wall portion 112 is located on one side of the first wall portion 111 along the width direction of the first wall portion 111, the width dimension of the first wall portion 111 ranges from 10 mm to 60 mm, the dimension of the first protruding portion 1112 along the protruding direction thereof ranges from 1 mm to 10 mm, the dimension of the first extension portion 1122 along the protruding direction of the first protruding portion 1112 ranges from 1 mm to 10 mm, the number of the first protruding portion 1112 is the same as that of the first extension portion 1122, and they are arranged one by one in correspondence, the electrode assembly 18 includes the tab 13, at least part of the tab 13 is located in the protrusion 10a, the adapter 17 electrically connects the tab 13 and the pole 12, at least part of the adapter 17 is located in the protrusion 10a, the number of the electrode assembly 18 is one or two, the outer surface of the second wall portion 112 is the largest area on the outer surface of the shell 11, the number of the pole 12 is two, the number of the protrusion 10a is two, the two poles 12 are respectively located on one protrusion 10a, and the protrusion 10a is located at one end of the first wall portion 111 along the length direction of the first wall portion 111.

[0240] The disclosure also provides a battery 100, as shown in FIGS. 30 and 31, which includes a box 20 and the battery cell 10 of any of the foregoing embodiments. The box 20 is provided with a containing space 20a, and the battery cell 10 is arranged in the containing space 20a. An inner wall of one side of the containing space 20a is provided with a containing cavity 20b, which is in communication with the containing space 20a. At least part of the protrusion 10a is contained in the containing cavity 20b.

[0241] In this way, the space in the battery 100 can better adapt to the outer contour of the battery cell 10, which is conducive to improving the utilization rate of the space in the battery 100 and improving the energy density in the battery 100.

[0242] In some embodiments, as shown in FIGS. 30 and 31, the outer surface of the box 20 is provided with a boss 23, which is located on the side of the containing cavity 20b away from the containing space 20a.

[0243] Therefore, the volume of the accommodating cavity 20b is increased, and the outer contour size of the battery 100 is reduced, thereby increasing the energy density of the battery 100.

[0244] The battery 100 is used as a power supply of the power utilization device.

[0245] Therefore, the volume of the protrusion 10a is increased in the limited size of the battery monomer 10, thereby increasing the space utilization of the power utilization device and the capacity of the battery 100.

[0246] In some embodiments, referring to FIGS. 32 and 33, the power utilization device is a vehicle, and the vehicle further includes a seat 30. The accommodating cavity 20b is located on the side of the box 20 facing the seat 30.

[0247] That is, the accommodating cavity 20b can use the idle space in the passenger compartment of the vehicle.

[0248] Therefore, the volume of the battery 100 in the vehicle is increased, thereby increasing the capacity of the battery 100, improving the cruising range of the vehicle, and making the flat wall of the box 20 face the ground, thereby making the bottom surface of the vehicle more flat, reducing the wind resistance coefficient of the vehicle, and improving the ground clearance of the vehicle.

[0249] It can be understood that the seat 30 is located above the battery 100 in the vertical direction.

[0250] It can be understood that, in the embodiments in which the battery 100 is provided with the boss 23, referring to FIG. 32, the accommodating cavity 20b is located on the side of the box 20 facing the seat 30. Therefore, the volume of the accommodating cavity 20b is further increased, thereby increasing the capacity of the battery 100.

[0251] In some embodiments in which the power utilization device is a vehicle, referring to FIGS. 30, 31 and 34, the vehicle further includes a support plate 40.

[0252] The support plate 40 refers to a component used to surround the internal compartment of the vehicle. Various components in the internal compartment of the vehicle can be arranged on the support plate 40. For example, the support plate 40 is the floor of the passenger compartment, and the seat 30 can be mounted on the support plate 40.

[0253] In some embodiments, referring to FIGS. 33 and 34, the support plate 40 is recessed on the side surface facing the battery monomer 10 to form a mounting space 40a, and at least part of the pole 12 is located in the mounting space 40a.

[0254] That is, a part of the battery cell 10 is located in the installation space 40a.

[0255] In this way, the volume of the battery 100 in the vehicle is increased, and the capacity of the battery 100 is increased, and the support plate 40 can shield and protect, and the adverse effects of the battery 100 on the personnel or devices in the space on the side of the support plate 40 away from the battery 100 are reduced.

[0256] In some embodiments provided with the installation space 40a, referring to FIG. 33 and FIG. 34, at least a part of the protrusion 10a is located in the installation space 40a.

[0257] In this way, the volume of the battery 100 in the vehicle is increased, and the capacity of the battery 100 is increased, and the support plate 40 can shield and protect, and the adverse effects of the battery 100 on the personnel or devices in the space on the side of the support plate 40 away from the battery 100 are reduced.

[0258] The various embodiments / implementation modes provided by the present disclosure can be combined with each other without contradiction.

[0259] The above only describes the preferred embodiments of the present disclosure and is not intended to limit the embodiments of the present disclosure. The embodiments of the present disclosure can be variously changed and modified by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the embodiments of the present disclosure shall be included in the protection scope of the embodiments of the present disclosure. Industrial applicability

[0260] The embodiments of the present disclosure provide a battery cell, a battery and an electric device which are beneficial to increase the volume of the protrusion.

Claims

1. A battery cell, wherein, The battery cell comprises: a housing comprising a first wall portion and a second wall portion, the first wall portion being disposed adjacent to the second wall portion, the first wall portion comprising a first main portion and a first protruding portion, the first protruding portion protruding from an outer surface of the first main portion in a thickness direction of the first wall portion, the second wall portion comprising a second main portion and a first extending portion, the first extending portion being located on a side of the second main portion close to the first wall portion, the first main portion being connected to the second main portion, the first protruding portion being connected to the first extending portion to form a protrusion on a surface of the housing; a pole being disposed in the protrusion.

2. The battery cell of claim 1, wherein, The number of the first protruding portions and the first extending portions is plural, and the first protruding portions and the first extending portions are arranged in one-to-one correspondence.

3. The battery cell of claim 1, wherein, The battery cell further comprises a tab, at least a part of the tab being located in the protrusion.

4. The battery cell of claim 3, wherein, The battery cell further comprises a connector, the connector electrically connecting the tab and the pole, at least a part of the connector being located in the protrusion.

5. The battery cell of claim 1, wherein, The battery cell further comprises an electrode assembly, the electrode assembly being disposed in the housing and electrically connected to the pole, the number of the electrode assembly being one or two.

6. The battery cell of claim 1, wherein, The housing further comprises a third wall portion, the third wall portion being located on opposite sides of the first wall portion with respect to the second wall portion, the third wall portion comprising a third main portion and a second extending portion, the first main portion being connected to the third main portion, the second extending portion being located on a side of the third main portion close to the first wall portion, the first protruding portion being connected to the second extending portion to make the second extending portion form a part of the protrusion.

7. The battery cell of claim 1, wherein, The housing further comprises a fourth wall portion, the fourth wall portion comprising a fourth main portion and a third extending portion, the fourth main portion being located on a side of the second main portion and connected, the third extending portion being located on a side of the fourth main portion close to the first wall portion, the first protruding portion being connected to the third extending portion to make the third extending portion form a part of the protrusion.

8. The battery cell of claim 7, wherein, The third extending portion is located on a side of the first extending portion and connected to the first extending portion.

9. The battery cell of claim 1, wherein, The housing further comprises a fifth wall portion, the fifth wall portion being located on a side of the housing away from the first wall portion, the fifth wall portion comprising a fifth main portion and a second protruding portion, the second wall portion further comprising a fourth extending portion, the fourth extending portion being located on a side of the second main portion close to the fifth wall portion, the fifth main portion being connected to the second main portion, the second protruding portion being connected to the first extending portion to form the protrusion on the surface of the housing.

10. The battery cell of claim 1, wherein, An outer surface of the second wall portion is a face with the largest area on an outer surface of the housing.

11. The battery cell of claim 1, wherein, The number of the poles is two, and the two poles are located on the same protrusion. Alternatively, the number of the protrusions is two, and the two poles are located on the respective protrusions.

12. The battery cell of claim 1, wherein, The protrusion is located at a central position of the first wall portion in a length direction of the first wall portion. Alternatively, the protrusion is located at one end of the first wall portion in the length direction of the first wall portion.

13. The battery cell of claim 1, wherein, The shell comprises a shell body and a cover plate, the shell body is internally provided with a mounting cavity, one side of the mounting cavity is open, and the cover plate is arranged at the open side of the mounting cavity, and the cover plate is opposite to the first wall portion; Alternatively, the cover plate forms the second wall portion.

14. The battery cell of claim 1, wherein, The shell comprises a shell body and a cover plate, the shell body is internally provided with a mounting cavity, one side of the mounting cavity is open to form a first opening, and the cover plate is arranged at the first opening, and the cover plate forms the first wall portion.

15. The battery cell of claim 14, wherein, The cover plate is in abutment with the shell body along the covering direction of the cover plate.

16. The battery cell of claim 14, wherein, The edge of the shell body protrudes along the covering direction of the cover plate to form a protruding edge portion, the first protruding portion protrudes away from the shell body, the first protruding portion is open to the side of the shell body to form a second opening, the first protruding portion is open to the side of the second wall portion to form a third opening, the second opening is in communication with the mounting cavity, the first extending portion closes the third opening, and at least part of the protruding edge portion forms the first extending portion.

17. The battery cell of claim 16, wherein, The first protruding portion is open to both sides perpendicular to the covering direction of the cover plate to form two third openings.

18. The battery cell of claim 16, wherein, The first protruding portion is located at at least one end of the first main body portion along a first direction, the first protruding portion is open to the side of the first main body portion away from the first main body portion along the first direction to form a fourth opening, the first protruding portion is open to at least one side along a second direction to form the third opening, the covering direction of the cover plate, the first direction and the second direction are perpendicular to each other, the protruding edge portion is located at at least one end of the shell body along the first direction, and the protruding edge portion closes the third opening and the fourth opening to form the protrusion together with the first protruding portion.

19. The battery cell of claim 16, wherein, The cover plate is in abutment with the shell body along the covering direction of the cover plate, the abutment position of the first main body portion and the shell body forms a first joint, and the abutment position of the first protruding portion and the protruding edge portion perpendicular to the covering direction of the cover plate forms a second joint, and the included angle between the extension direction of the first joint and the extension direction of the second joint ranges from 95° to 145°.

20. The battery cell of claim 1, wherein, The second wall portion is located at one side of the first wall portion along the width direction of the first wall portion, and the width dimension of the first wall portion ranges from 10 mm to 60 mm.

21. The battery cell of claim 1, wherein, The size of the first protruding portion along the protruding direction thereof ranges from 1 mm to 10 mm. And / or, the size of the first extending portion along the protruding direction of the first protruding portion ranges from 1 mm to 10 mm.

22. A battery, wherein, The battery comprises a box body and the battery monomer of any one of claims 1-21, the box body is internally provided with an accommodation space, the battery monomer is arranged in the accommodation space, an inner wall of one side of the accommodation space is provided with an accommodation cavity, the accommodation cavity is in communication with the accommodation space, and at least part of the protrusion is accommodated in the accommodation cavity.

23. The battery of claim 22, wherein, The outer surface of the box body is provided with a boss, and the boss is located at the side of the accommodation cavity away from the accommodation space.

24. An electrical device, comprising: The electric device comprises the battery in claim 22, and the battery serves as the power supply of the electric device.

25. The powered device of claim 24, wherein, The electric device is a vehicle, the vehicle further comprises a seat, and the accommodation cavity is located at the side of the box body facing the seat. The electric device is a vehicle, the vehicle further comprises a seat, and the accommodation cavity is located at the side of the box body facing the seat.

26. The powered device of claim 25, wherein, An outer surface of the box is provided with a boss, which is located on a side of the accommodating cavity away from the accommodating space.

27. The powered device of claim 24, wherein, The electric device is a vehicle, and the vehicle further comprises a support plate, a side surface of the support plate towards the battery cell is recessed to form a mounting space, and at least part of the pole is located in the mounting space. And / or, at least part of the protrusion is located in the mounting space.

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