Battery monomer, battery and electric device

Abstract

The embodiment of the utility model provides a battery monomer, a battery and a power utilization device. The battery monomer comprises a shell, an electrode assembly and a connecting part, the shell is provided with an electrode lead-out piece; the electrode assembly is accommodated in the shell and comprises a first tab; the connecting part is used for electrically connecting the first tab and the electrode lead-out piece and comprises a first connecting part and a second connecting part, the first connecting part is bent relative to the second connecting part, one of the first connecting part and the second connecting part is used for being electrically connected with the first tab, and the other one of the first connecting part and the second connecting part is used for being electrically connected with the electrode lead-out piece; the first connecting part is provided with a first limiting part, the second connecting part is provided with a second limiting part, the first limiting part and the second limiting part are matched with each other to limit relative movement of the first connecting part and the second connecting part in the first direction, and the first direction is perpendicular to the thickness direction of the first connecting part. By arranging the first limiting part and the second limiting part, relative displacement on the connecting part is reduced, and breakage of the connecting part is reduced.

Description

Technical Field

[0001] The present application relates to the field of batteries, and in particular to a battery cell, a battery and an electrical device. Background Art

[0002] As the consumption of natural resources and environmental damage become increasingly serious, various fields are increasingly interested in devices that can store energy and effectively utilize the stored energy. Battery cells are systems that can be combined with each other to utilize new renewable energy.

[0003] In the field of battery equipment technology, improving battery safety is an important research direction.

[0004] Application Contents

[0005] The embodiments of the present application provide a battery cell, a battery, and an electrical device, which reduce the possibility of breakage of connecting parts and improve battery safety.

[0006] In a first aspect of the embodiments of the present application, a battery cell is provided, including a housing, an electrode assembly, and a connecting component. The housing is provided with an electrode lead-out member; the electrode assembly is contained in the housing and includes a first pole ear; the connecting component is used to electrically connect the first pole ear and the electrode lead-out member, and includes a first connecting portion and a second connecting portion, the first connecting portion is bent relative to the second connecting portion, one of the first connecting portion and the second connecting portion is used to electrically connect to the first pole ear, and the other is used to electrically connect to the electrode lead-out member; the first connecting portion is provided with a first limiting portion, the second connecting portion is provided with a second limiting portion, the first limiting portion and the second limiting portion cooperate with each other to limit the relative movement of the first connecting portion and the second connecting portion in a first direction, the first direction being perpendicular to the thickness direction of the first connecting portion.

[0007] By adopting the above structure and providing the first limiting portion and the second limiting portion, the relative displacement in the first direction in the connecting component can be reduced, fatigue in the first direction on the connecting component can be alleviated, and fracture of the connecting component can be reduced.

[0008] In some optional embodiments of the present application, one of the first limiting portion and the second limiting portion includes a receiving portion, and the other includes a first convex portion, and the first convex portion is at least partially received in the receiving portion.

[0009] By adopting the above structure, by setting the first limiting part and the second limiting part as the accommodating part or the first convex part, the first limiting part and the second limiting part can be matched with each other to achieve limitation in the first direction and the first connecting part and the second connecting part can be limited to each other.

[0010] In some optional embodiments of the present application, the accommodation portion includes a groove or a through hole.

[0011] With the above structure, by setting the accommodation portion as a groove or a through hole, not only is it easy to shape the accommodation portion, but it can also make the first protrusion more stably limited to the accommodation portion.

[0012] In some optional embodiments of the present application, a side wall of the accommodating portion is provided with a notch, and a size of the notch is smaller than a size of the first protrusion.

[0013] By adopting the above structure, by setting the size of the notch to be smaller than the size of the first protrusion, it is possible to prevent the first protrusion from passing through the notch and escaping from the accommodating portion, thereby causing the problem of position limiting failure.

[0014] In some optional embodiments of the present application, the groove is in a closed shape.

[0015] With the above structure, by setting the groove in a closed shape, the first protrusion can be stably arranged in the connecting portion, thereby improving the limiting effect of the accommodating portion on the first protrusion.

[0016] In some optional embodiments of the present application, the side wall of the accommodating portion includes a first guide surface, the side wall of the first protrusion includes a second guide surface, and the first guide surface and the second guide surface are correspondingly arranged in the accommodating portion.

[0017] With the above structure, by providing the first guide surface and the second guide surface, it is convenient for the first protrusion to enter the accommodating portion, and the limiting effect of the accommodating portion on the first protrusion is ensured.

[0018] In some optional embodiments of the present application, the first connecting portion includes a first main body and a second protrusion, the second protrusion protrudes from a surface of the first main body facing the second connecting portion, and at least part of the accommodating portion is arranged on the second protrusion.

[0019] By adopting the above structure, through setting the second protrusion, the first connecting part can be raised toward the second connecting part, thereby shortening the relative distance between the first protrusion and the accommodating part, and facilitating the mutual limitation of the first protrusion and the accommodating part. Secondly, after the first connecting part and the second connecting part are bent, a gap will be formed between the first connecting part and the second connecting part due to the bending angle, and the second protrusion can also effectively make up for the gap, thereby improving the stability of the first protrusion and the accommodating part after limitation.

[0020] In some optional embodiments of the present application, the first limiting portion includes a groove, and the groove is formed by being recessed from an end surface of the second convex portion facing the second connecting portion.

[0021] With the above structure, by arranging the opening of the groove at the top end of the second convex portion, the relative distance between the first convex portion and the groove can be shortened, making it easier for the first convex portion to enter the groove.

[0022] In some optional embodiments of the present application, the second connecting portion includes a first part and a second part, the first part is bent relative to the second part, the second part connects the first part and the first connecting portion, one of the first connecting portion and the first part is used to connect the first pole ear, and the other is used to connect the electrode lead-out piece; a second limiting portion is provided on the first part, and / or a second limiting portion is provided on the second part.

[0023] With the above structure, by providing the first part and the second part, the connection between the electrode lead-out member and the first electrode tab can be facilitated.

[0024] In some optional embodiments of the present application, the first part and the second part are both provided with a second limiting portion, the second limiting portion of the second part is a through hole, and the second limiting portion of the first part is configured to pass through the through hole and cooperate with the first limiting portion for limiting.

[0025] With the above structure, by providing the through hole, the second limiting portion of the first part can cooperate with the first limiting portion to limit the position.

[0026] In some optional embodiments of the present application, an overcurrent enhancement area is provided on the second portion having the via hole.

[0027] By adopting the above structure and setting the flow enhancement area, the flow loss of the second part caused by opening the via hole can be compensated.

[0028] In some optional embodiments of the present application, the first limiting portion is located at the center of the first connecting portion.

[0029] With the above structure, by setting the first limiting portion at the center of the first connecting portion, the first limiting portion can overlap with the center hole, thereby optimizing the structure on the first connecting portion and making the first connecting portion more concise.

[0030] According to a second aspect of the embodiments of the present application, a battery is provided, comprising the above-mentioned battery cell.

[0031] According to a third aspect of the embodiments of the present application, there is provided an electrical device comprising the above-mentioned battery cell for providing electrical energy.

[0032] Compared with the related art, in the battery cell, battery and electrical device of the embodiments of the present application, by providing the first limit portion and the second limit portion, the relative displacement in the first direction within the connecting component is reduced, the possibility of the connecting component breaking is reduced, and the battery safety is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The features, advantages and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

[0034] Figure 1 A schematic diagram of the structure of a vehicle provided in one embodiment of the present application.

[0035] Figure 2 A schematic diagram of the structure of a battery provided in one embodiment of the present application.

[0036] Figure 3 A schematic diagram of the structure of a battery provided in yet another embodiment of the present application.

[0037] Figure 4 A schematic diagram of the structure of a battery cell provided in one embodiment of the present application.

[0038] Figure 5 A schematic structural diagram of a connecting component in an expanded state provided in an embodiment of the present application.

[0039] Figure 6 A schematic diagram of the structure of a connecting component in a folded state provided in an embodiment of the present application.

[0040] Figure 7 for Figure 6 Schematic diagram of the cross-sectional structure along the AA direction.

[0041] Figure 8 A schematic cross-sectional structural diagram of a connecting component in a folded state provided in another embodiment of the present application.

[0042] Fig. 9 A schematic cross-sectional structural diagram of a connecting component in a folded state provided in yet another embodiment of the present application.

[0043] Fig.10 A schematic diagram of the dimensions of a first limiting portion and a second limiting portion when a connecting component is in a folded state provided in an embodiment of the present application.

[0044] Fig.11 A schematic structural diagram of a receiving portion provided in one embodiment of the present application.

[0045] Fig.12 A structural schematic diagram of a connecting component in an expanded state provided in yet another embodiment of the present application.

[0046] Fig.13 for Fig.12 The illustrated embodiment is a schematic cross-sectional structural diagram of a folded connecting component.

[0047] In the attached figure:

[0048] 1000, vehicle; 100, battery; 200, controller; 300, motor; 110, housing; 111, first housing portion; 112, second housing portion; 10, battery cell; 11, electrode assembly; 12, housing; 121, shell; 122, end cap; 123, electrode lead-out piece; 2, connecting component; 21, first connecting portion; 211, first main body; 212, second protrusion; 22, second connecting portion; 221, first part; 222, second part; 3, first limiting portion; 31, notch; 32, first guide surface; 301, via hole; 302, flow enhancement area; 4, second limiting portion; 41, second guide surface. DETAILED DESCRIPTION

[0049] The following detailed description and drawings of the embodiments of the present application are used to illustrate the principles of the present application, but cannot be used to limit the scope of the present application, that is, the present application is not limited to the described embodiments.

[0050] In the description of the present application, it should be noted that, unless otherwise specified, "multiple" means more than two; the terms "upper", "lower", "left", "right", "inside", "outside", etc., indicating the orientation or positional relationship, are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. "Vertical" is not strictly vertical, but is within the allowable error range. "Parallel" is not strictly parallel, but is within the allowable error range.

[0051] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0052] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of this application. In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0053] At present, with the continuous development of battery technology, the application scenarios of battery cells are also increasing. There are many application scenarios with harsh working environments, such as high vibration environments, which cause damage to the internal structure of the battery cells and cause safety problems. Therefore, in the actual use of battery cells, the safety of battery cells has become one of the obstacles restricting its further promotion. In related technologies, a battery cell can generally include a shell and an electrode assembly disposed therein. The shell is generally provided with an electrode lead-out piece, and the electrode assembly is provided with a pole ear. The pole ear and the electrode lead-out piece are connected by a connecting component. In the production process of the battery cell, in order to ensure that the electrode assembly can smoothly enter the shell, a gap is usually left between the electrode assembly and the shell.

[0054] However, the existence of the gap makes it easy for the electrode assembly to shake inside the housing. The shaking of the electrode assembly drives the connecting components to shake, causing fatigue of the connecting components, which in turn causes the adapter to break, causing safety problems.

[0055] In order to improve the safety of battery cells, the applicant has found that adding a limiting structure in the connecting component can reduce the relative movement of the connecting component in the first direction, thereby improving the safety problem caused by the breakage of the connecting component and improving the safety of the battery cells.

[0056] Based on the above considerations, in order to improve the safety of battery cells, the inventors of the present application have designed a battery cell, a battery and an electrical device after in-depth research.

[0057] In the present application, the battery cell may include a lithium-ion secondary battery cell, a lithium-ion primary battery cell, a lithium-sulfur battery cell, a sodium-lithium-ion battery cell, a sodium-ion battery cell or a magnesium-ion battery cell, etc., and the embodiments of the present application are not limited thereto. The battery cell may be cylindrical, flat, rectangular or in other shapes.

[0058] The battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity. For example, the battery may include a battery module or a battery pack. The battery generally includes a box for encapsulating one or more battery cells. The box can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells.

[0059] The electric devices mentioned in the embodiments of the present application may be mobile phones, tablets, laptop computers, electric toys, electric tools, battery cars, electric cars, ships, spacecraft, etc. Among them, electric toys may include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft may include airplanes, rockets, space shuttles, and spacecraft, etc.

[0060] For the convenience of description, the following embodiments are described by taking a vehicle as an example of the electrical device in one embodiment of the present application.

[0061] like Figure 1 As shown, Figure 1 A schematic diagram of the structure of a vehicle provided for some embodiments of the present application. Vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 100 is provided inside the vehicle 1000, and the battery 100 may be provided at the bottom, head or tail of the vehicle 1000. The battery 100 may be used to power the vehicle 1000, for example, the battery 100 may be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery 100 to power the motor 300, for example, for starting, navigating and driving the vehicle 1000.

[0062] In some embodiments of the present application, the battery 100 can not only serve as an operating power source for the vehicle 1000, but also serve as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0063] In some embodiments of the present application, Figure 2 As shown, Figure 2 A schematic diagram of the structure of a battery 100 provided for some embodiments of the present application. The battery 100 includes a housing 110, and the housing 110 may include a first housing portion 111 and a second housing portion 112 connected to each other. A plurality of battery cells are connected in parallel, in series, or in a mixed combination and are placed in a space formed by connecting the first housing portion 111 and the second housing portion 112. The shape of the first housing portion 111 and the second housing portion 112 may be determined according to the shape formed by the combination of a plurality of battery cells. The battery cell may be cylindrical, flat, rectangular, or in other shapes, and the embodiments of the present application do not limit this. The packaging methods of the battery cells include, but are not limited to, cylindrical battery cells, square battery cells, and soft-pack battery cells, and the embodiments of the present application do not specifically limit this. In addition, the battery 100 may also include other structures, such as a confluence component, for achieving electrical connection between a plurality of battery cells.

[0064] like Figures 3 to 6 As shown, Figure 3 The schematic diagram of the structure of the battery provided by some embodiments of the present application is as follows: Figure 4 A schematic diagram of the structure of a battery cell provided in some embodiments of the present application, Figure 5 This is a schematic diagram of the structure of the connecting component in the expanded state provided by an embodiment of the present application. Figure 6A schematic diagram of the structure of the folded state of the connecting component provided in an embodiment of the present application. In some embodiments of the present application, a battery cell 10 is provided, including a shell 12, an electrode assembly 11 and a connecting component 2. The shell 12 is provided with an electrode lead-out member 123; the electrode assembly 11 is accommodated in the shell 12 and includes a first pole ear; the connecting component 2 is used to electrically connect the first pole ear and the electrode lead-out member 123, and includes a first connecting portion 21 and a second connecting portion 22, the first connecting portion 21 is bent relative to the second connecting portion 22, one of the first connecting portion 21 and the second connecting portion 22 is used to electrically connect to the first pole ear, and the other is used to electrically connect to the electrode lead-out member 123; the first connecting portion 21 is provided with a first limiting portion 3, and the second connecting portion 22 is provided with a second limiting portion 4, and the first limiting portion 3 and the second limiting portion 4 cooperate with each other to limit the relative movement of the first connecting portion 21 and the second connecting portion 22 in the first direction y, and the first direction is perpendicular to the thickness direction x of the first connecting portion 21.

[0065] The housing 12 can be used to contain electrolytes, such as electrolytes. The housing 12 can be in various structural forms, such as a cuboid. For example, the shape of the housing 12 can be determined according to the specific shape of the electrode assembly 11. If the electrode assembly 11 is a cylindrical structure, a cylindrical housing 12 can be selected. The housing 12 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0066] The electrode assembly 11 may include a positive electrode sheet, a negative electrode sheet and a separator, and the separator is used to insulate and isolate the positive electrode sheet from the negative electrode sheet. The electrode assembly 11 may be a laminated structure, a wound structure or other structures.

[0067] The electrode lead-out member is used to electrically connect the electrode assembly to an external circuit to realize charging and discharging of the electrode assembly. Exemplarily, the electrode lead-out member 123 can be configured as a positive electrode terminal or a negative electrode terminal, which is used to electrically connect to the electrode assembly 11 to output the electrical energy generated by the electrode assembly 11.

[0068] The first limiting portion 3 and the second limiting portion 4 can be a recess matching structure, a snap-fit ​​structure or other structures.

[0069] The first connection part 21 and the second connection part 22 can be an integrated structure or a split structure. For example, the connection component 2 is bent, and the parts located on both sides of the fold are the first connection part 21 and the second connection part 22 respectively.

[0070] The thickness direction of the first connecting portion 21 is Figure 5 When the battery cell is a cylindrical battery cell, the thickness direction of the first connecting portion 21 is the axial direction of the cylindrical battery cell.

[0071] Reference Figure 7 , Figure 7for Figure 6 In the cross-sectional structural diagram along the AA direction, the first direction y is perpendicular to the thickness direction x of the first connecting portion 21 . When the battery cell is a cylindrical battery cell, the first direction is the radial direction of the cylindrical battery cell.

[0072] By providing the first limiting portion 3 and the second limiting portion 4, the relative displacement in the first direction y in the connecting component 2 is reduced, the possibility of the connecting component 2 breaking is reduced, and the battery safety is improved.

[0073] Optionally, after the first connection portion 21 and the second connection portion 22 are bent, they are stacked in the thickness direction x of either the first connection portion 21 or the second connection portion 22 .

[0074] In some embodiments, the housing 12 may include a shell 121 and an end cap 122, wherein the shell 121 is a hollow structure with an opening on one side, and the end cap 122 covers the opening of the shell 121 and forms a sealed connection to form a sealed space for accommodating the electrode assembly 11 and the electrolyte, and the positive electrode terminal and the negative electrode terminal are installed on the end cap 122.

[0075] In other embodiments, the housing 12 may also be other structures, for example, the housing 12 includes a shell 121 and two end caps 122, the shell 121 is a hollow structure with two opposite openings, and one end cap 122 is correspondingly covered at one opening of the shell 121 and forms a sealed connection to form a sealed space for accommodating the electrode assembly 11 and the electrolyte. In this structure, the positive electrode terminal and the negative electrode terminal can be installed on the same end cap 122, or on different end caps 122.

[0076] like Figure 8 and Fig. 9 As shown, Figure 8 This is a schematic cross-sectional view of a connecting component in a folded state provided by another embodiment of the present application. Fig. 9 A schematic cross-sectional structure diagram of a folded state of a connecting component provided for another embodiment of the present application. In some optional embodiments of the present application, one of the first limiting portion 3 and the second limiting portion 4 includes a receiving portion, and the other includes a first convex portion, and the first convex portion is at least partially received in the receiving portion. By setting the first limiting portion 3 and the second limiting portion 4 as the receiving portion or the first convex portion, the first limiting portion 3 and the second limiting portion 4 can be matched in a concave-convex manner to achieve limiting in the first direction, and the first connecting portion 21 and the second connecting portion 22 are mutually limited.

[0077] Optionally, the first position-limiting portion 3 is configured as a receiving portion, and the second position-limiting portion 4 is configured as a first convex portion. Optionally, the first position-limiting portion 3 is configured as a first convex portion, and the second position-limiting portion 4 is configured as a receiving portion.

[0078] Optionally, refer to Figure 7 The first limiting portion 3 is configured as a groove provided on the surface of the first connecting portion 21 and recessed toward the side away from the second connecting portion 22 in the thickness direction x. The second limiting portion 4 is configured as a protrusion structure provided on the second connecting portion 22 and capable of being inserted into the aforementioned groove.

[0079] Optionally, refer to Figure 8 and Fig. 9 The first limiting portion 3 is configured as a through hole that passes through both sides of the first connecting portion 21 in the thickness direction x, and the second limiting portion 4 is configured as a columnar structure that is arranged on the second connecting portion 22 and can be inserted into the aforementioned through hole.

[0080] As shown in some optional embodiments of the present application, the receiving portion includes a groove or a through hole. By setting the receiving portion as a groove or a through hole, it is not only easy to shape the receiving portion, but also enables the first protrusion to be more firmly limited to the receiving portion.

[0081] like Fig.10 As shown, Fig.10 A schematic diagram of the dimensions of the first limiting portion and the second limiting portion when the connecting component is folded in an embodiment of the present application. In some optional embodiments of the present application, a notch 31 is provided on the side wall of the receiving portion, and the size L1 of the notch 31 is smaller than the size L2 of the first convex portion. By setting the size of the notch 31 to be smaller than the size of the first convex portion, it is possible to prevent the first convex portion from detaching from the receiving portion through the notch 31, causing the problem of limiting failure.

[0082] Reference Figure 5 In some optional embodiments of the present application, the groove is in a closed shape. By setting the groove in a closed shape, the first convex portion can be stably arranged in the connecting portion, thereby improving the limiting effect of the accommodating portion on the first convex portion.

[0083] Optionally, on a plane perpendicular to the extension direction of the first protrusion, the first protrusion may be a closed circle or a closed square, and on a plane perpendicular to the extension direction of the groove or the through hole, the groove or the through hole may be a closed circle or a closed square.

[0084] like Figure 7 and Fig.11 As shown, Fig.11 A schematic diagram of the structure of an accommodating portion provided in an embodiment of the present application. In some optional embodiments of the present application, the side wall of the accommodating portion includes a first guide surface 32, and the side wall of the first convex portion includes a second guide surface 41, and the first guide surface 32 and the second guide surface 41 are correspondingly arranged in the accommodating portion. By providing the first guide surface 32 and the second guide surface 41, it is convenient for the first convex portion to enter the accommodating portion, and the limiting effect of the accommodating portion on the first convex portion is ensured.

[0085] Reference Fig.11Optionally, the first guide surface 32 is a side wall in the first direction y and / or the second direction z in the accommodating portion, and the first guide surface 32 is inclined. Exemplarily, in the thickness direction, the top end of the first guide surface 32 is inclined toward the side away from the inside of the accommodating portion, the second direction z is perpendicular to the first direction y and the thickness direction x, and the first guide surface 32 cooperates with the second guide surface 41 to make the passing area of ​​the top end of the accommodating portion larger than the passing area of ​​the bottom end of the accommodating portion, so as to facilitate the first protrusion to enter the accommodating portion.

[0086] like Figure 5 , Figures 7 and 8 As shown, in some optional embodiments of the present application, the first connection part 21 includes a first main body 211 and a second protrusion 212, the second protrusion 212 protrudes from the surface of the first main body 211 facing the second connection part 22, and at least part of the first limiting part 3 is arranged on the second protrusion 212. By providing the second protrusion 212, the first connection part 21 can be raised toward the second connection part 22, shortening the relative distance between the first protrusion and the accommodation part, and facilitating the connection between the first protrusion and the accommodation part. Secondly, after the first connection part 21 and the second connection part 22 are bent, a gap will be formed between the first connection part 21 and the second connection part 22 due to the bending angle, and the second protrusion 212 can also effectively make up for the gap, thereby improving the stability of the first protrusion and the accommodation part after being limited.

[0087] For example, refer to Figure 7 The second protrusion 212 can be separated from the first body 211, and the second protrusion 212 is fixed to the first body 211 by welding, gluing, etc. For example, referring to Figure 8 The second protrusion 212 can be integrally formed with the first body 211 .

[0088] In some optional embodiments of the present application, refer to Figure 7 The first limiting portion 3 includes a groove, which is formed by being recessed from the end surface of the second convex portion 212 facing the second connecting portion 22. By arranging the opening of the groove at the top of the second convex portion 212, the relative distance between the first convex portion and the groove can be shortened, making it easier for the first convex portion to enter the groove.

[0089] Optionally, the groove and the first protrusion may be formed by stamping the first connection portion 21 and the second connection portion 22 .

[0090] like Figure 5 , Fig.12 and Fig.13 As shown, Fig.12 This is a structural schematic diagram of a connecting component in an expanded state provided by another embodiment of the present application. Fig.13 for Fig.11A schematic diagram of a cross-sectional structure of a folded connecting component provided in the illustrated embodiment. In some optional embodiments of the present application, the second connecting portion 22 includes a first portion 221 and a second portion 222, the first portion 221 is bent relative to the second portion 222, the second portion 222 connects the first portion 221 and the first connecting portion 21, one of the first connecting portion 21 and the first portion 221 is used to connect the first pole ear, and the other is used to connect the electrode lead-out member 123; the first portion 221 is provided with a second limiting portion 4, and / or the second portion 222 is provided with a second limiting portion 4. By providing the first portion 221 and the second portion 222, the connection between the electrode lead-out member 123 and the first pole ear can be facilitated.

[0091] like Fig.12 and Fig.13 As shown, in some optional embodiments of the present application, the first part 221 and the second part 222 are both provided with a second limiting portion 4, the second limiting portion 4 of the second part 222 is a through hole 301, and the second limiting portion 4 of the first part 221 is configured to pass through the through hole 301 and cooperate with the first limiting portion 3 for limiting. By providing the through hole 301, the second limiting portion 4 of the first part 221 can cooperate with the first limiting portion 3 for limiting.

[0092] like Fig.12 As shown, in some optional embodiments of the present application, a flow enhancement area 302 is provided on the second portion 222 having the via hole 301. By providing the flow enhancement area 302, the flow loss of the second portion 222 caused by the via hole 301 can be compensated.

[0093] Optionally, refer to Fig.12 In a plane perpendicular to the thickness direction x, the second portion 222 not connected to the first connection portion 21 and the two sides of the first portion 221 extend in a direction away from the via hole 301 to form a flow enhancement area 302 .

[0094] In some optional embodiments of the present application, the first limiting portion 3 is located at the center of the first connecting portion 21. By arranging the first limiting portion 3 at the center of the first connecting portion 21, the first limiting portion 3 can coincide with the center hole, thereby optimizing the structure on the first connecting portion 21 and making the first connecting portion 21 more concise.

[0095] An embodiment of the present application also provides a battery, comprising the above-mentioned battery cell.

[0096] The embodiment of the present application also provides an electrical device, including the above-mentioned battery cell, for providing electrical energy.

[0097] In some optional embodiments of the present application, a battery cell is provided, including a housing 12, an electrode assembly 11, and a connecting component 2. The housing 12 is provided with an electrode lead-out member 123; the electrode assembly 11 is accommodated in the housing 12 and includes a first pole ear; the connecting component 2 is used to electrically connect the first pole ear and the electrode lead-out member 123, and includes a first connecting portion 21 and a second connecting portion 22, the first connecting portion 21 is integrally formed with the second connecting portion 22 and is bent, the first connecting portion 21 is used to electrically connect to the first pole ear, the second connecting portion 22 includes a first portion 221 and a second portion 222 connected to each other, the first portion 221 is connected to the first connecting portion 21, and the second portion 222 is used to electrically connect to the electrode The lead-out piece 123 is electrically connected; the first connecting part 21 is provided with a first limiting part 3, and the second connecting part 22 is provided with a second limiting part 4, the first limiting part 3 is configured as a groove, the second limiting part 4 is configured as a first convex part, and the first connecting part 21 is also provided with a second convex part 212 protruding toward the first part 221, and the groove is provided on the second convex part 212, the first limiting part 3 and the second limiting part 4 cooperate with each other to limit the relative movement of the first connecting part 21 and the second connecting part 22 in a first direction, and the first direction is perpendicular to the thickness direction of the first connecting part 21.

[0098] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery cell, characterized in that: include: A housing provided with an electrode lead-out member; an electrode assembly, contained in the housing and comprising a first electrode tab; as well as a connecting component, used to electrically connect the first electrode tab and the electrode lead-out member, and comprising a first connecting portion and a second connecting portion, wherein the first connecting portion is bent relative to the second connecting portion, one of the first connecting portion and the second connecting portion is used to electrically connect to the first electrode tab, and the other is used to electrically connect to the electrode lead-out member; The first connection part is provided with a first limiting part, and the second connection part is provided with a second limiting part. The first limiting part and the second limiting part cooperate with each other to limit the relative movement of the first connection part and the second connection part in a first direction, and the first direction is perpendicular to the thickness direction of the first connection part.

2. The battery cell according to claim 1, characterized in that: One of the first limiting portion and the second limiting portion includes a receiving portion, and the other includes a first convex portion, and the first convex portion is at least partially received in the receiving portion.

3. The battery cell according to claim 2, characterized in that: The receiving portion includes a groove or a through hole.

4. The battery cell according to claim 3, characterized in that: A notch is provided on the side wall of the accommodation portion, and a size of the notch is smaller than a size of the first protrusion.

5. The battery cell according to claim 3, characterized in that: The groove is in a closed shape.

6. The battery cell according to any one of claims 2 to 5, characterized in that: The side wall of the accommodation portion includes a first guide surface, and the side wall of the first protrusion includes a second guide surface. The first guide surface and the second guide surface are correspondingly arranged in the accommodation portion.

7. The battery cell according to any one of claims 3 to 5, characterized in that: The first connecting portion includes a first main body and a second protrusion, the second protrusion protrudes from a surface of the first main body facing the second connecting portion, and at least a portion of the accommodation portion is disposed on the second protrusion.

8. The battery cell according to claim 7, characterized in that: The accommodation portion includes the groove, which is formed by being recessed from an end surface of the second convex portion facing the second connecting portion.

9. The battery cell according to any one of claims 1 to 5, characterized in that: The second connecting portion includes a first portion and a second portion, the first portion is bent relative to the second portion, the second portion connects the first portion and the first connecting portion, one of the first connecting portion and the first portion is used to connect the first electrode tab, and the other is used to connect the electrode lead-out member; The first part is provided with a second limiting portion, and / or the second part is provided with a second limiting portion.

10. The battery cell according to claim 9, characterized in that: The first part and the second part are both provided with a second limiting portion, the second limiting portion of the second part is a through hole, and the second limiting portion of the first part is configured to pass through the through hole and cooperate with the first limiting portion for limiting.

11. The battery cell according to claim 10, characterized in that: An overcurrent enhancement area is arranged on the second portion having the via hole.

12. The battery cell according to claim 1, characterized in that: The first limiting portion is located at the center of the first connecting portion.

13. A battery, characterized in that: The invention comprises a battery cell as claimed in any one of claims 1 to 12.

14. An electrical device, characterized in that: The battery cell comprises a battery cell as claimed in any one of claims 1 to 12, and is used for providing electric energy.

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