Battery monomer, battery device and electric equipment

Abstract

The utility model relates to a battery monomer, a battery device and electric equipment, and the battery monomer comprises: a housing, one end of which is provided with an electrode terminal; the electrode assembly is arranged in the shell, and the electrode assembly comprises a main body part and tab parts positioned at at least two ends of the main body part; and the connecting piece is arranged in the shell and is electrically connected between the tab parts at at least two different ends, and the connecting piece is electrically connected with the electrode terminal. The tab parts are located at the at least two ends of the main body part, namely, the tabs on the multiple sides of the main body part, the tabs on the different sides are electrically connected through the connecting pieces, and then the tabs are uniformly connected to the electrode terminal at one end through the connecting pieces, so that for the structure of the single battery with the multiple tabs, the number of the electrode terminals can be reduced, and the cost is reduced. The overall volume of the battery monomer is reduced, so that the energy density of the battery monomer is improved.

Description

TECHNICAL FIELD

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

[0002] With the development of battery technology, the requirement for the energy density of the battery is higher and higher, so that the size of the battery monomer is larger and larger. At the same time, the battery is required to have fast charging capability to meet more frequent use requirements.

[0003] Therefore, in order to improve the fast charging capability of the battery monomer, a battery monomer with a multi-tab structure is designed, that is, the electrode assembly forms a plurality of tab parts, which can increase the number of current loops and reduce the electronic transmission path inside the electrode assembly to improve the fast charging efficiency.

[0004] However, for the above-mentioned battery monomer with a multi-tab structure, the number of electrode terminals of the battery monomer is increased, which affects the overall volume of the battery monomer and is not conducive to improving the energy density of the battery monomer. Invention content

[0005] Therefore, it is necessary to provide a battery monomer, a battery device and an electric equipment in view of the problem that the number of electrode terminals of the battery monomer with a multi-tab structure is increased, which affects the overall volume of the battery monomer and is not conducive to improving the energy density of the battery monomer.

[0006] In a first aspect, the present application provides a battery monomer, comprising a shell, an electrode assembly and a connecting piece, one end of the shell is provided with an electrode terminal; the electrode assembly is arranged inside the shell, and the electrode assembly comprises a main body part and tab parts at least at two ends of the main body part; the connecting piece is arranged inside the shell and electrically connected between the tab parts at least at different ends, and the connecting piece is electrically connected with the electrode terminal.

[0007] Through the above structure, for the structure of the battery monomer with a multi-tab, the number of electrode terminals can be reduced, the overall volume of the battery monomer can be reduced, and thus the energy density of the battery monomer can be improved.

[0008] In some embodiments, the main body part comprises oppositely arranged first and second end faces, and the tab parts comprise first positive and negative tabs and second positive and negative tabs, the first positive and negative tabs are arranged at the first end face, and the second positive and negative tabs are arranged at the second end face.

[0009] Among them, the connecting piece is electrically connected between the first positive tab and the second positive tab, and / or the connecting piece is electrically connected between the first negative tab and the second negative tab.

[0010] By the above structure, the first positive tab and the second positive tab are commonly connected to the electrode terminal of the positive electrode, and the first negative tab and the second negative tab are commonly connected to the electrode terminal of the negative electrode, the structure of the battery monomer one side pole is realized, the number of electrode terminals is reduced, the overall volume of the battery monomer is effectively reduced, and the energy density is improved.

[0011] In some embodiments, the connecting piece includes an extension part and a bending part arranged in intersection, the bending part is connected to opposite ends of the extension part, and the bending part is electrically connected with the first positive tab and the second positive tab, and / or the bending part is electrically connected with the first negative tab and the second negative tab.

[0012] Among them, one of the bending parts of each connecting piece is electrically connected with the electrode terminal.

[0013] By the connecting piece, the plurality of tabs are commonly electrically connected to the electrode terminal at one end of the shell, the structure of the battery monomer one end pole is realized, in addition, the arrangement of the extension part and the bending part can further reduce the occupied space of the connecting piece in the shell, and improve the overall energy density of the battery monomer.

[0014] In some embodiments, the extension part includes a conductive body and an insulating coating, the conductive body is integrally formed with the corresponding bending part, and the insulating coating is coated on the outer periphery of the conductive body.

[0015] By the above structure, not only the smooth electrical connection between the tab part and the electrode terminal can be realized, but also the probability of short circuit in the battery monomer can be reduced.

[0016] In some embodiments, the insulating coating includes a heat-conducting insulating layer and a heat-insulating insulating layer, the heat-conducting insulating layer is coated on the side surface of the conductive body facing the electrode assembly, and the heat-insulating insulating layer is coated on the side surface of the conductive body away from the electrode assembly.

[0017] By the above structure, the heat generated by the electrode assembly during the cycle process is better transmitted to the connecting piece and the shell, and the risk of damage caused by local high temperature of the electrode assembly can be reduced.

[0018] In some embodiments, the heat-conducting insulating layer includes one or more of a heat-conducting insulating silica gel coating, a heat-conducting silica cloth insulating coating, and a polyimide film heat-conducting insulating coating; and / or the heat-insulating insulating layer includes one or more of a glass fiber coating, an asbestos coating, a rock wool coating, and a silicate coating.

[0019] In some embodiments, the thickness ratio between the heat-conducting insulating layer and the heat-insulating insulating layer ranges from 0.5 to 2.

[0020] In some embodiments, the thickness ratio between the heat-conducting insulating layer and the heat-insulating insulating layer ranges from 0.8 to 1.5.

[0021] In some embodiments, the battery monomer further comprises a adapter, which is electrically connected between the connecting piece and the electrode terminal.

[0022] By setting the adapter, the smooth electrical connection between the connecting piece and the electrode terminal can be achieved, thereby achieving the smooth input and output of the battery monomer.

[0023] In a second aspect, the application further provides a battery device comprising the battery monomer as described above.

[0024] In a third aspect, the application further provides a power consuming device comprising the battery device as described above.

[0025] The battery monomer, the battery device and the power consuming device described above, the tab part is located at least two ends of the main body part, that is, the main body part has multiple sides with tabs. Different sides of the tabs are electrically connected by the connecting piece, and then the connecting piece is uniformly connected to the electrode terminal at one end. Therefore, for the structure of the multi-tab battery monomer, the number of electrode terminals can be reduced, the overall volume of the battery monomer can be reduced, and the energy density of the battery monomer can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the battery monomer according to one or more embodiments.

[0027] Figure 2 It is a structural schematic diagram of the electrode assembly and the connecting piece according to one or more embodiments.

[0028] Figure 3 It is a structural schematic diagram of the connecting piece according to one or more embodiments.

[0029] Figure 4 It is Figure 3 It is a local enlarged view of A in FIG. 1.

[0030] REFERENCE SIGNS: 100, battery monomer; 10, shell; 20, electrode assembly; 30, connecting piece; 40, adapter; 11, electrode terminal; 21, main body part; 22, tab part; 23, first end face; 24, second end face; 25, first positive tab; 26, first negative tab; 27, second positive tab; 28, second negative tab; 31, extension part; 32, bending part; 33, conductive body; 34, insulating coating; 35, thermally conductive and insulating layer; 36, thermally and insulatively insulated layer. DETAILED DESCRIPTION

[0031] In order to make the above objectives, features and advantages of the present application more clear and comprehensible, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a number of different ways beyond the specific embodiments described herein and by one of ordinary skill in the art without departing from the spirit and scope of the present application, and it is therefore intended that all such variations be considered as falling within the scope of the present application. It should be understood that the use of the terms "include", "comprise" or "contain" herein should not be understood as limiting the present application to the features or steps described herein, but rather the use of these terms is intended to cover the presence of the features or steps described herein as well as the presence of other features or steps not described herein.

[0032] In the description of the present application, it should be understood that, if these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0033] In addition, if these terms "first", "second" appear, these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features referred to. Therefore, the features defined with "first", "second" can include at least one of the features explicitly or implicitly. In the description of the present application, if the term "a plurality of" appears, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0034] In the present application, unless otherwise specifically defined and limited, if the terms "mount", "connect", "connect", "fix" and the like appear, these terms should be interpreted broadly. 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 or interaction relationship of two elements, unless otherwise specifically limited. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0035] In the present application, unless specifically defined and limited otherwise, if there is a description of a first feature "on" or "under" a second feature, etc., it can mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "over", "above" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only means that the first feature is horizontally higher than the second feature. The first feature "under", "below" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only means that the first feature is horizontally lower than the second feature.

[0036] It should be noted that if an element is referred to as being "fixed to" or "set to" another element, it can be directly on the other element or there can be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there can be an intermediate element. If present, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in the present application are only for illustrative purposes and do not mean the only implementation.

[0037] At present, from the development of market situation, the application of battery is more and more widely. The battery is not only applied to the energy storage power supply system of hydropower, thermal power, wind power and solar power station, but also widely applied to electric bicycles, electric motorcycles, electric vehicles and other electric vehicles and other fields. With the continuous expansion of the application field of battery, the demand of its market is also increasing.

[0038] The battery monomer is the smallest unit to constitute the battery. The battery monomer usually includes a shell and an electrode assembly arranged inside the shell. The shell includes a shell body and a top cover. The shell body has an opening, and the top cover is arranged at the opening of the shell body. The top cover and the shell body jointly enclose a containing cavity, and the electrode assembly is placed in the containing cavity.

[0039] As the energy density requirement of the battery monomer is higher and higher at present, the size of the battery monomer is larger and larger, and the battery is required to have fast charging capability. Therefore, a battery monomer with a multi-tab structure appears. That is, a plurality of tab parts are formed on the electrode assembly, for example, a positive tab and a negative tab are respectively formed at opposite ends of the electrode assembly, and there are four tabs in total. Through such a structure, the number of current loops can be increased, the electronic transmission path inside the electrode assembly can be reduced, and the fast charging efficiency can be improved.

[0040] However, for the above-mentioned battery cell with the multi-tab structure, the number of electrode terminals on the battery cell housing needs to be increased. Specifically, the conventional battery cell only sets the positive electrode terminal and the negative electrode terminal on the top cover. For the battery cell with the multi-tab structure, such as the four-tab structure, not only the positive electrode terminal and the negative electrode terminal need to be set on the top cover, but also the positive electrode terminal and the negative electrode terminal need to be set on the bottom surface of the housing so as to connect the electrode terminals with the tabs one by one.

[0041] The structure of the above-mentioned battery cell leads to an increase in the overall volume of the battery cell due to the increase in the number of electrode terminals, which affects the energy density of the battery cell.

[0042] Based on the above considerations, in order to solve the problem that the battery cell with the multi-tab structure increases the number of electrode terminals, which affects the overall volume of the battery cell and is not conducive to improving the energy density of the battery cell, one or more embodiments of the present application provide a battery cell, the tab part is located at least two ends of the main part, that is, the multi-side tab of the main part, the tabs of different sides are electrically connected through the connecting piece, and then the connecting piece is uniformly connected to the electrode terminal at one end. Therefore, for the structure of the battery cell with the multi-tab, the number of electrode terminals can be reduced, the overall volume of the battery cell can be reduced, and the energy density of the battery cell can be improved.

[0043] It should be noted that the battery device (Battery Apparatus) mentioned in the embodiments of the present application can include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly (Battery Cell Assembly) can include a plurality of battery cells connected in series, parallel or mixed connection through a busbar component.

[0044] In some embodiments, the battery cell assembly (Battery Cell Assembly) is usually formed by arranging a plurality of battery cells. As an example, the battery cell assembly can be a battery module (Battery Module), and the battery module is formed by arranging and fixing a plurality of battery cells into an independent module. As an example, the battery module can be formed by bundling a plurality of battery cells with a cable tie.

[0045] In some embodiments, the battery device can be a battery pack (battery Pack), and the battery pack includes a box body and one or more battery cell assemblies, and the battery cell assemblies are accommodated in the box body.

[0046] As an example, the battery cell assembly can be a battery module, and the battery cell assembly can be accommodated in the box body by fixing the battery module in the box body.

[0047] As an example, the battery cell assembly can also be housed in the case by directly fixing a plurality of battery cells to the case.

[0048] Referring to Figure 1 and Figure 2 An embodiment of the present application provides a battery cell 100, comprising a shell 10, an electrode assembly 20 and a connecting piece 30. The shell 10 is provided with an electrode terminal 11 at one end. The electrode assembly 20 is arranged inside the shell 10, and the electrode assembly 20 comprises a main body part 21 and tab parts 22 at at least two ends of the main body part 21. The connecting piece 30 is arranged inside the shell 10 and electrically connected between the tab parts 22 at the at least two different ends, and the connecting piece 30 is electrically connected with the electrode terminal 11.

[0049] It should be noted that the shell 10 refers to a structure in which the electrode assembly 20 and other functional components are arranged, which can provide a housing space and play a certain protective role on the electrode assembly 20 and other functional components. The shell 10 can include a shell and a top cover, and one end of the shell is open, and the top cover is arranged on the opening.

[0050] Among them, the shell 10 is provided with an electrode terminal 11 at one end, specifically, the electrode terminal 11 is protrudingly arranged on one side end surface of the shell 10, which can be but not limited to protrudingly arranged on the outer surface of the top cover.

[0051] The electrode terminal 11 includes a positive electrode terminal and a negative electrode terminal, and the positive electrode terminal and the negative electrode terminal are arranged at intervals on the top cover.

[0052] The electrode assembly 20 refers to a component that undergoes an electrochemical reaction in the battery cell 100, and one or more electrode assemblies 20 can be arranged inside the shell 10. Among them, the electrode assembly 20 usually includes a positive electrode sheet, a separator and a negative electrode sheet arranged in a stacked or wound manner, and the part of the positive electrode sheet and the negative electrode sheet having active material constitutes the main body part 21 of the electrode assembly 20, and the part of the positive electrode sheet and the negative electrode sheet not having active material respectively forms a positive electrode tab and a negative electrode tab, and each positive electrode tab and the corresponding negative electrode tab together constitutes a tab part 22.

[0053] Specifically, the tab part 22 is located at at least two ends of the main body part 21, that is, the electrode assembly 20 is constructed as a multi-tab structure. For ease of understanding, the following will be described by taking two tab parts 22 as an example, and the two tab parts 22 are respectively located at opposite ends of the main body part 21. Among them, when the electrode assembly 20 is placed in the shell 10, one of the tab parts 22 is arranged towards the bottom surface of the shell, and the other tab part 22 is arranged towards the top cover.

[0054] The connector 30 is a component that electrically connects at least two pole lugs 22 at different ends, and electrically connects the connected pole lugs 22 to the electrode terminal 11. Specifically, the connector 30 is disposed within the housing 10 along with the electrode assembly 20. When two pole lugs 22 are provided, the opposite ends of the connector 30 are electrically connected to the pole lugs 22 at each end, and then the connector 30 is electrically connected to the electrode terminal 11. In this way, the connector 30 acts as a current collector between the two pole lugs 22, and then electrically connects both pole lugs 22 to the electrode terminal 11, allowing the electrode terminal 11 to be disposed on only one end of the housing 10.

[0055] Through the above structure, for the structure of the multi-tab battery cell 100, the number of electrode terminals 11 can be reduced, the overall volume of the battery cell 100 can be reduced, and the energy density of the battery cell 100 can be improved.

[0056] In some embodiments, the main body 21 includes a first end face 23 and a second end face 24 disposed opposite each other, and the tab portion 22 includes a first positive tab 25, a first negative tab 26, a second positive tab 27, and a second negative tab 28. The first positive tab 25 and the first negative tab 26 are disposed on the first end face 23, and the second positive tab 27 and the second negative tab 28 are disposed on the second end face 24. A connector 30 is electrically connected between the first positive tab 25 and the second positive tab 27, and / or a connector 30 is electrically connected between the first negative tab 26 and the second negative tab 28.

[0057] Specifically, the first positive electrode tab 25 and the first negative electrode tab 26 are arranged in a group and are spaced apart from each other on the first end surface 23 of the main body 21. The second positive electrode tab 27 and the second negative electrode tab 28 are arranged in a group and are spaced apart from each other on the second end surface 24 of the main body 21. In other words, two electrode tabs 22 are formed at opposite ends of the main body 21.

[0058] Furthermore, a connector 30 is provided between the first positive tab 25 and the second positive tab 27, with one end of the connector 30 electrically connected to the first positive tab 25 and the other end electrically connected to the second positive tab 27. Then, the connector 30 is electrically connected to the positive terminal on the top cover.

[0059] A connector 30 can also be provided between the first negative tab 26 and the second negative tab 28, with one end of the connector 30 electrically connected to the first negative tab 26 and the other end electrically connected to the second negative tab 28. The connector 30 is then electrically connected to the negative terminal on the top cover. This establishes an electrical connection between the electrode assembly 20 and the electrode terminal 11, allowing power to be input and output from the electrode assembly 20 via the electrode terminal 11.

[0060] Through the above structure, the first positive electrode ear 25 and the second positive electrode ear 27 are connected together to the positive electrode terminal 11, and the first negative electrode ear 26 and the second negative electrode ear 28 are connected together to the negative electrode terminal 11, thereby realizing the structure of the terminal output on one side of the battery cell 100, reducing the number of electrode terminals 11, effectively reducing the overall volume of the battery cell 100, and improving the energy density.

[0061] like Figure 3 and Figure 4 As shown, in some embodiments, the connector 30 includes an intersecting extension portion 31 and a bent portion 32. The bent portion 32 is connected to opposite ends of the extension portion 31. The bent portion 32 is electrically connected to the first positive electrode tab 25 and the second positive electrode tab 27, and / or the bent portion 32 is electrically connected to the first negative electrode tab 26 and the second negative electrode tab 28. One of the bent portions 32 of each connector 30 is electrically connected to the electrode terminal 11.

[0062] It should be noted that the electrode assembly 20 is typically stacked or wound into a rectangular structure to facilitate placement within a rectangular housing. Thus, the extension 31 and the bent portion 32 are disposed perpendicularly, with the bent portion 32 connected to opposite ends of the extension 31. That is, the bent portion 32 and the extension 31 together form a concave structure.

[0063] At this point, the bent portion 32 at one end is electrically connected to the first positive tab 25 or the first negative tab 26, and the bent portion 32 at the other end is electrically connected to the second positive tab 27 or the second negative tab 28. The bent portion 32 at one end is then electrically connected to the positive terminal or the negative terminal on the top cover to achieve a connection between the first positive tab 25 and the second positive tab 27, or between the first negative tab 26 and the second negative tab 28. At the same time, the extension portion 31 can be better positioned between the side surface of the electrode assembly 20 and the inner surface of the housing, further reducing the space occupied within the housing.

[0064] The multiple tabs are electrically connected to the electrode terminal 11 at one end of the shell 10 through the connector 30, so that the pole is output from one end of the battery cell 100. In addition, the setting of the extension portion 31 and the bending portion 32 can further reduce the space occupied by the connector 30 in the shell 10 and improve the overall energy density of the battery cell 100.

[0065] In some embodiments, the extension portion 31 includes a conductive body 33 and an insulating coating 34 . The conductive body 33 and the corresponding bending portion 32 are integrally formed, and the insulating coating 34 is coated on the outer periphery of the conductive body 33 .

[0066] Specifically, when the opposite ends of the extension part 31 are respectively provided with the bending parts 32, the conductive body 33 is integrally formed with the bending parts 32 at the two ends. That is, the bending parts 32 are made of the same material as the conductive body 33 and have the same conductive performance.

[0067] Further, the insulating coating 34 is coated on the outer periphery of the conductive body 33, and when the extension part 31 is arranged between the electrode assembly 20 and the inner side wall of the shell, the insulating coating 34 can play a good insulating role and reduce the probability of short circuit.

[0068] Through the above structure, not only the smooth electrical connection between the tab part 22 and the electrode terminal 11 can be achieved, but also the probability of short circuit inside the battery monomer 100 can be reduced.

[0069] In some embodiments, the insulating coating 34 includes a heat-conductive insulating layer 35 and a thermal insulation insulating layer 36, the heat-conductive insulating layer 35 is coated on the side surface of the conductive body 33 facing the electrode assembly 20, and the thermal insulation insulating layer 36 is coated on the side surface of the conductive body 33 away from the electrode assembly 20.

[0070] In order to further reduce the occupied space of the connecting piece 30 inside the shell, the connecting piece 30 can be arranged in a sheet structure. When the extension part 31 is located between the electrode assembly 20 and the inner side wall of the shell, one side surface of the extension part 31 faces the electrode assembly 20, and the other side surface faces the inner side wall of the shell, that is, away from the electrode assembly 20.

[0071] Specifically, the heat-conductive insulating layer 35 is coated on the side surface facing the electrode assembly 20, and the thermal insulation insulating layer 36 is coated on the side surface away from the electrode assembly 20, which can make the heat generated by the electrode assembly 20 in the circulation process better transmitted to the connecting piece 30 and the shell 10, and can reduce the risk of damage caused by the local temperature of the electrode assembly 20 being too high.

[0072] Therefore, through the above structure, the heat generated by the electrode assembly 20 in the circulation process is better transmitted to the connecting piece 30 and the shell 10, and the risk of damage caused by the local temperature of the electrode assembly 20 being too high can be reduced.

[0073] In some embodiments, the heat-conductive insulating layer 35 includes one or more of a heat-conductive insulating silica gel coating, a heat-conductive silica cloth insulating coating, and a polyimide film heat-conductive insulating coating; and / or, the thermal insulation insulating layer 36 includes one or more of a glass fiber coating, an asbestos coating, a rock wool coating, and a silicate coating.

[0074] Specifically, the heat-conducting insulation layer 35 can be but is not limited to a heat-conducting insulation silicone coating, a heat-conducting insulation silicone cloth coating, and a heat-conducting insulation polyimide film coating, and the heat-insulating insulation layer 36 can be but is not limited to a glass fiber coating, an asbestos coating, a rock wool coating, and a silicate coating. In this way, the heat generated by the electrode assembly 20 during the circulation process can be better transferred to the connecting piece 30 and the shell 10, and the risk of damage caused by the local high temperature of the electrode assembly 20 can be reduced.

[0075] In some embodiments, the thickness ratio between the heat-conducting insulation layer 35 and the heat-insulating insulation layer 36 ranges from 0.5 to 2.

[0076] In some embodiments, the thickness ratio between the heat-conducting insulation layer 35 and the heat-insulating insulation layer 36 ranges from 0.8 to 1.5.

[0077] As a preferred embodiment, the thickness ratio between the heat-conducting insulation layer 35 and the heat-insulating insulation layer 36 can be set to 1:1, i.e., the heat-conducting insulation layer 35 and the heat-insulating insulation layer 36 are set to have the same thickness, so as to facilitate the heat transfer between the connecting piece 30 and the shell 10.

[0078] As shown in FIG. 1, in some embodiments, the battery monomer 100 further comprises a connecting piece 30, which is electrically connected between the electrode terminal 11 and the electrode assembly 20. Figure 1

[0079] Specifically, the connecting piece 30 can be but is not limited to a connecting sheet, which is arranged between the electrode assembly 20 and the top cover, and one side of the connecting piece 30 is electrically connected with the bent portion 32 of the connecting piece 30, and the other side is electrically connected with the corresponding electrode terminal 11, so as to realize the electrical connection between the connecting piece 30 and the electrode terminal 11, and smoothly realize the input and output of the battery monomer 100.

[0080] By arranging the connecting sheet, the smooth electrical connection between the connecting piece 30 and the electrode terminal 11 can be realized, so as to smoothly realize the input and output of the battery monomer 100.

[0081] Based on the same concept as the above-mentioned battery monomer 100, the present application further provides a battery device comprising the above-mentioned battery monomer 100.

[0082] Based on the same concept as the above-mentioned battery device, the present application further provides a power consumption device comprising the above-mentioned battery device.

[0083] ​According to one or more embodiments, in use, a connecting piece 30 is connected between the first positive tab 25 and the second positive tab 27, with one end of the connecting piece 30 being electrically connected to the first positive tab 25 and the other end of the connecting piece 30 being electrically connected to the second positive tab 27, and then one side of the connecting piece 30 near the top cover is electrically connected to the adapter piece, and the adapter piece is electrically connected to the positive terminal on the top cover.

[0084] Similarly, a connecting piece 30 is connected between the first negative tab 26 and the second negative tab 28, with one end of the connecting piece 30 being electrically connected to the first negative tab 26 and the other end of the connecting piece 30 being electrically connected to the second negative tab 28, and then one side of the connecting piece 30 near the top cover is electrically connected to the adapter piece, and the adapter piece is electrically connected to the negative terminal on the top cover.

[0085] Finally, the top cover is welded to the shell, so that the top cover is sealed to the opening of the shell, thereby realizing the assembly of the battery monomer 100.

[0086] The technical features of the above-described embodiments can be combined in any manner. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, but it should be considered that any combination of the technical features is within the scope of the present disclosure, as long as the combination does not result in contradictions.

[0087] The above-described embodiments only express several embodiments of the present application, and the description is relatively specific and detailed, but it should not be considered as a limitation on the scope of the patent application. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of the present application. Therefore, the scope of the patent protection of the present application should be subject to the appended claims.

Claims

1. A battery cell, characterized in that: include: a housing having an electrode terminal at one end; an electrode assembly disposed inside the housing, the electrode assembly comprising a main body and tabs located at at least two ends of the main body; and A connecting member is disposed inside the housing and electrically connected between the pole ear portions at at least two different ends. The connecting member is electrically connected to the electrode terminal.

2. The battery cell according to claim 1, wherein: The main body includes a first end face and a second end face that are opposite to each other, and the tab portion includes a first positive tab, a first negative tab, a second positive tab, and a second negative tab, wherein the first positive tab and the first negative tab are arranged on the first end face, and the second positive tab and the second negative tab are arranged on the second end face; The connector is electrically connected between the first positive electrode tab and the second positive electrode tab, and / or the connector is electrically connected between the first negative electrode tab and the second negative electrode tab.

3. The battery cell according to claim 2, characterized in that: The connector includes an extending portion and a bent portion intersecting each other, the bent portion being connected to opposite ends of the extending portion, and the bent portion being electrically connected to the first positive electrode tab and the second positive electrode tab, and / or the bent portion being electrically connected to the first negative electrode tab and the second negative electrode tab; Wherein, one of the bent portions of each of the connecting members is electrically connected to the electrode terminal.

4. The battery cell according to claim 3, characterized in that The extension portion includes a conductive body and an insulating coating. The conductive body and the corresponding bending portion are integrally formed, and the insulating coating is coated on the outer periphery of the conductive body.

5. The battery cell according to claim 4, characterized in that The insulating coating includes a thermally conductive insulating layer and a thermally insulating layer. The thermally conductive insulating layer is coated on a surface of the conductive body facing the electrode assembly, and the thermally insulating layer is coated on a surface of the conductive body facing away from the electrode assembly.

6. The battery cell according to claim 5, characterized in that The thermally conductive insulating layer includes one or more of a thermally conductive insulating silicone coating, a thermally conductive silicone cloth insulating coating, and a polyimide film thermally conductive insulating coating; And / or, the thermal insulation layer includes one or more of a glass fiber coating, an asbestos coating, a rock wool coating, and a silicate coating.

7. The battery cell according to claim 5 or 6, characterized in that: The thickness ratio between the thermally conductive insulating layer and the thermally insulating layer is in the range of 0.5 to 2.

8. The battery cell according to claim 7, characterized in that The thickness ratio between the thermally conductive insulating layer and the thermally insulating layer is in the range of 0.8 to 1.

5.

9. The battery cell according to claim 1, characterized in that The battery cell further includes a transition piece electrically connected between the connection piece and the electrode terminal.

10. A battery device, characterized in that: The battery cell comprises the battery cell according to any one of claims 1 to 9.

11. An electrical device, characterized in that: Comprising the battery device as claimed in claim 10.

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