Battery cell, battery, and electrical device

Abstract

A battery cell (100), comprising: a casing (1), a first cell (2), and a second cell (3); the casing (1) is provided with a pole terminal (11); the first cell (2) and the second cell (3) are respectively arranged in the casing (1), the first cell (2) being provided with a first tab group (21), a second tab group (22), and a third tab group (23), and the second cell (3) being provided with a fourth tab group (31) and a fifth tab group (32); the first tab group (21) is electrically connected to the pole terminal (11), one of the second tab group (22) and the third tab group (23) is electrically connected to the casing (1), the second tab group (22) is electrically connected to the fourth tab group (31), and the third tab group (23) is electrically connected to the fifth tab group (32).

Description

Battery cells, batteries and electrical equipment

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application is based on the Chinese patent application with application number 2023226871836 and application date September 28, 2023, and claims the priority of the above-mentioned Chinese patent application. The entire content of the above-mentioned Chinese patent application is hereby introduced into this application as a reference. Technical Field

[0003] The present application relates to the field of battery technology, and in particular to a battery cell, a battery, and an electrical device. Background Art

[0004] The development of mobile electronic devices has led to the emergence of an increasing number of irregularly shaped battery cells. The current approach to addressing these irregularly shaped battery cells is to prepare shaped electrode sheets that match the shape of the battery cells and then laminate them into battery cells. However, the preparation of irregularly shaped battery cells results in low material utilization and increased production costs.

[0005] Application Contents

[0006] The present application aims to solve one of the technical problems in the related art at least to a certain extent.

[0007] To this end, one purpose of the present application is to propose a battery cell that can improve material utilization, reduce the difficulty of preparing battery cells, and thus reduce the preparation cost of the battery cell.

[0008] According to an embodiment of the present application, a battery cell includes: a shell, the shell is provided with a pole; a first battery cell and a second battery cell, the first battery cell and the second battery cell are respectively arranged in the shell, the first battery cell is provided with a first pole tab group, a second pole tab group and a third pole tab group, the second battery cell is provided with a fourth pole tab group and a fifth pole tab group, the first pole tab group is electrically connected to the pole, one of the second pole tab group and the third pole tab group is electrically connected to the shell, the second pole tab group is electrically connected to the fourth pole tab group, and the third pole tab group is electrically connected to the fifth pole tab group.

[0009] According to the battery cell of the embodiment of the present application, a first battery cell and a second battery cell are provided, and the two battery cells are electrically connected to facilitate the preparation of a special-shaped battery cell. The special-shaped battery cell prepared in this way can improve the utilization rate of materials, reduce the difficulty of preparing the battery cell, and thus reduce the preparation cost of the battery cell.

[0010] According to the battery cells of some embodiments of the present application, the first tab group, the second tab group and the third tab group are located on the first side of the first battery cell; the fourth tab group and the fifth tab group are located on the first side of the second battery cell, and the first side of the first battery cell and the first side of the second battery cell are arranged opposite each other.

[0011] According to the battery cells of some embodiments of the present application, a first insulating member is provided between the fourth tab group and the first battery cell; and / or a second insulating member is provided between the fifth tab group and the first battery cell.

[0012] According to the battery cells of some embodiments of the present application, the second tab group is electrically connected to the fourth tab group through a first connecting piece, the third tab group is electrically connected to the fifth tab group through a second connecting piece, and one of the first connecting piece and the second connecting piece is electrically connected to the outer shell.

[0013] According to the battery cells of some embodiments of the present application, the first end of the second tab group and the second end of the fourth tab group bend and extend away from each other, and both ends of the first connecting piece are electrically connected to the first end and the second end respectively.

[0014] According to the battery cells of some embodiments of the present application, the third end of the third tab group and the fourth end of the fifth tab group bend and extend away from each other, and both ends of the second connecting piece are electrically connected to the third end and the fourth end, respectively.

[0015] According to the battery cell of some embodiments of the present application, the outer shell is provided with an injection hole for injecting liquid into the outer shell; the battery cell further includes a sealing assembly for sealing the injection hole.

[0016] According to the battery cells of some embodiments of the present application, the sealing assembly includes: a sealing plug, which cooperates with the liquid injection hole to seal the liquid injection hole; and a sealing cover, which is provided on the outer side wall of the shell and covers the sealing plug.

[0017] According to the battery cell of some embodiments of the present application, the sealing plug is a flexible member, and the sealing cover is in contact with the sealing plug.

[0018] According to the battery cell of some embodiments of the present application, the second tab group is located between the first tab group and the third tab group, and the injection hole is located between the pole and the second tab group.

[0019] This application also proposes a battery.

[0020] A battery according to an embodiment of the present application includes: a box; and a plurality of battery cells, wherein the plurality of battery cells are disposed in the box, and the battery cells are the battery cells described in any one of the above embodiments.

[0021] The present application also proposes an electrical device.

[0022] The electrical equipment according to the embodiments of the present application includes the battery cell described in any one of the above embodiments or the battery described in the above embodiments.

[0023] The advantages of the electrical equipment, the battery and the above-mentioned battery cell compared with the prior art are the same and will not be described in detail here.

[0024] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] FIG1 is a schematic structural diagram of a battery cell according to some embodiments of the present application;

[0026] FIG2 is an exploded view of the battery cell shown in FIG1 ;

[0027] FIG3 is a side view of the battery cell shown in FIG1 ;

[0028] FIG4 is a cross-sectional view taken along line AA in FIG3 ;

[0029] Figure 5 is an enlarged view of point B in Figure 2;

[0030] FIG6 is an enlarged view of point C in FIG4 ;

[0031] FIG7 is an enlarged view of point D in FIG4 ;

[0032] FIG8 is an enlarged view of point E in FIG4 ;

[0033] FIG9 is a cross-sectional view of a battery cell according to some other embodiments of the present application.

[0034] Reference numerals:

[0035] Battery cell 100,

[0036] Housing 1, housing body 101, first cover plate 102, second cover plate 103;

[0037] Pole 11, injection hole 12;

[0038] First battery cell 2, first tab group 21, second tab group 22, third tab group 23;

[0039] Second battery cell 3, fourth tab group 31, fifth tab group 32;

[0040] A first insulating member 41, a second insulating member 42;

[0041] A first connecting piece 51, a first end 511 of the first connecting piece, and a second end 512 of the first connecting piece;

[0042] A second connecting piece 52, a first end 521 of the second connecting piece, and a second end 522 of the second connecting piece;

[0043] Sealing assembly 6, sealing plug 61, sealing cover 62. DETAILED DESCRIPTION

[0044] The following describes in detail embodiments of the present application, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0045] The battery cell 100 according to an embodiment of the present application is described below with reference to FIG. 1 to FIG. 9 .

[0046] The battery cell 100 according to the embodiment of the present application includes: a housing 1 , a first battery cell 2 , and a second battery cell 3 .

[0047] As shown in Figure 4, the shell 1 is provided with a pole 11, the first battery cell 2 and the second battery cell 3 are respectively arranged in the shell 1, the first battery cell 2 is provided with a first pole tab group 21, a second pole tab group 22 and a third pole tab group 23, the second battery cell 3 is provided with a fourth pole tab group 31 and a fifth pole tab group 32, the first pole tab group 21 is electrically connected to the pole 11, one of the second pole tab group 22 and the third pole tab group 23 is electrically connected to the shell 1, the second pole tab group 22 and the fourth pole tab group 31 are electrically connected, and the third pole tab group 23 and the fifth pole tab group 32 are electrically connected.

[0048] Therefore, it is convenient to prepare the special-shaped battery cell 100 in this way, and it is beneficial to improve the utilization rate of materials, reduce the difficulty of preparing the battery cell, and thus reduce the preparation cost of the battery cell 100.

[0049] For example, as shown in FIG1 , the battery cell 100 is an irregular-shaped battery cell 100 , where “irregular-shaped” refers to other shapes excluding regular shapes such as rectangle and circle.

[0050] As shown in FIG. 2 , the battery cell 100 includes a housing 1 , a first battery cell 2 , and a second battery cell 3 .

[0051] As shown in FIG2 , the housing 1 includes a housing body 101, a first cover, and a second cover. The housing body 101 has openings at both ends. The first cover is fixedly connected to one end of the housing body 101 to seal one open end of the housing body 101. The second cover is fixedly connected to the other end of the housing body 101 to seal the other open end of the housing body 101. Thus, the periphery of the first and second covers abut and are fixed to the housing body 101 to form a receiving cavity. That is, a receiving cavity for accommodating the battery cell is formed between the housing body 101, the first cover, and the second cover.

[0052] The first cover and the second cover can be fixedly connected to the shell body 101 by welding, and the battery shell can be made of metal materials such as stainless steel, nickel alloy, chromium alloy or aluminum alloy.

[0053] The first tab group 21 includes at least one first tab, and multiple first tabs can be stacked and gathered to form the first tab group 21. It should be noted that other tab groups can also be the same as the first tab group 21, that is, other tab groups can include multiple tabs.

[0054] It should be noted that the first battery cell 2 or the second battery cell 3 can be prepared by a winding or lamination process. That is, the first battery cell 2 and the second battery cell 3 can both be prepared by winding, or the first battery cell 2 and the second battery cell 3 can both be prepared by lamination, or the first battery cell 2 is prepared by winding and the second battery cell 3 is prepared by lamination, or the first battery cell 2 is prepared by lamination and the second battery cell 3 is prepared by winding.

[0055] As shown in Figure 1, the shell 1 is constructed as an irregular structure. For example, the shell 1 is similar to two rectangles of different sizes spliced ​​together, and the accommodating cavity defined in the shell 1 includes a first part with a larger space and a second part with a smaller space. The first battery cell 2 and the second battery cell 3 are respectively arranged in the shell 1, wherein the shape of the first battery cell 2 is adapted to the first part and is located in the first part, and the shape of the second battery cell 3 is adapted to the second part and is located in the second part.

[0056] Among them, the first battery cell 2 is provided with a first pole tab group 21, a second pole tab group 22 and a third pole tab group 23, the second battery cell 3 is provided with a fourth pole tab group 31 and a fifth pole tab group 32, the second pole tab group 22 and the fourth pole tab group 31 are electrically connected, and the third pole tab group 23 and the fifth pole tab group 32 are electrically connected to electrically connect the first battery cell 2 and the second battery cell 3, so that the first battery cell 2 and the second battery cell 3 can be equivalent to one battery cell.

[0057] It should be noted that one of the first pole tab group 21, the second pole tab group 22 and the third pole tab group 23 has an opposite electrical property to the other two, one of the fourth pole tab group 31 and the fifth pole tab group 32 is a positive pole and the other is a negative pole, that is, the fourth pole tab group 31 and the fifth pole tab group 32 have opposite electrical properties, and when actually connected, the second pole tab group 22 and the fourth pole tab group 31 have opposite electrical properties, and the third pole tab group 23 and the fifth pole tab group 32 have opposite electrical properties, or the second pole tab group 22 and the fourth pole tab group 31 have the same electrical properties, and the third pole tab group 23 and the fifth pole tab group 32 have the same electrical properties.

[0058] As shown in Figures 1 and 3, a pole 11 is provided on the shell, and the pole 11 is insulated and fixedly connected to the shell 1. The first tab group 21 is electrically connected to the pole 11, and one of the second tab group 22 and the third tab group 23 is electrically connected to the shell 1 to respectively lead out the two electrodes of the first battery cell 2.

[0059] Among them, one of the second tab group 22 and the third tab group 23 can directly abut against the shell 1, thereby realizing electrical connection between one of the second tab group 22 and the third tab group 23 and the shell 1, which saves connection structure and reduces preparation cost.

[0060] It is worth noting that since the first battery cell 2 and the second battery cell 3 are of regular shape, the shape of their electrodes is also relatively neat, which can avoid die-cutting the electrodes into specific shapes, thereby improving material utilization and reducing preparation costs.

[0061] In this way, regular-shaped electrodes can be used to prepare battery cells, and regular-shaped first and second battery cells 2 and 3 can be used to prepare irregular-shaped battery cells, so there is no need to use irregular-shaped electrodes to prepare battery cells, which can reduce material waste, improve material utilization, and reduce preparation costs.

[0062] According to the battery cell 100 of the embodiment of the present application, a first battery cell 2 and a second battery cell 3 are provided, and the two battery cells are electrically connected to facilitate the preparation of a special-shaped battery cell 100. The special-shaped battery cell 100 prepared in this way can improve the utilization rate of materials, reduce the difficulty of preparing the battery cell, and thus reduce the preparation cost of the battery cell 100.

[0063] In some embodiments, as shown in Figure 4, the first pole tab group 21, the second pole tab group 22 and the third pole tab group 23 are located on the first side of the first battery cell 2 (such as the upper side in Figure 4), the fourth pole tab group 31 and the fifth pole tab group 32 are located on the first side of the second battery cell 3 (such as the lower side in Figure 4), and the first side of the first battery cell 2 and the first side of the second battery cell 3 are arranged opposite each other.

[0064] As a result, the first tab group 21, the second tab group 22, and the third tab group 23 and the fourth tab group 31 and the fifth tab group 32 can be located on the side of the first battery cell 2 and the second battery cell 3 facing each other, thereby shortening the distance between the second tab group 22 and the fourth tab group 31, and shortening the distance between the third tab group 23 and the fifth tab group 32.

[0065] For example, the first pole tab group 21, the second pole tab group 22 and the third pole tab group 23 are spaced apart on the upper side of the first battery cell 2, and the fourth pole tab group 31 and the fifth pole tab group 32 are spaced apart on the lower side of the second battery cell 3, wherein the fourth pole tab group 31 is located between the second pole tab group 22 and the fifth pole tab group 32, and the fifth pole tab group 32 is located between the fourth pole tab group 31 and the third pole tab group 23, that is, the first pole tab group 21, the second pole tab group 22, the third pole tab group 23, the fourth pole tab group 31 and the fifth pole tab group 32 are staggered in sequence, thereby making the structure of the battery cell 100 more compact and facilitating improved space utilization.

[0066] In this way, it is easy to reduce the difficulty of electrical connection between the second tab group 22 and the fourth tab group 31, and to reduce the difficulty of electrical connection between the third tab group 23 and the fifth tab group 32, so that the electrical connection between the first battery cell 2 and the second battery cell 3 is simpler, which is conducive to reducing assembly difficulty and improving assembly efficiency.

[0067] In some embodiments, as shown in FIG6 , a first insulating member 41 is provided between the fourth tab group 31 and the first battery cell 2 , and as shown in FIG7 , a second insulating member 42 is provided between the fifth tab group 32 and the first battery cell 2 .

[0068] Therefore, by providing a first insulating member 41 between the fourth tab group 31 and the first battery cell 2, the fourth tab group 31 is prevented from contacting the first battery cell 2, thereby preventing the battery cell 100 from short-circuiting, thereby improving the safety of the battery. And by providing a second insulating member 42 between the fifth tab group 32 and the first battery cell 2, the fifth tab group 32 is prevented from contacting the first battery cell 2, thereby preventing the battery cell 100 from short-circuiting, thereby improving the safety of the battery.

[0069] Alternatively, in some embodiments, as shown in FIG. 7 , a second insulating member 42 is provided between the fifth tab group 32 and the first battery cell 2 to prevent the fifth tab group 32 from contacting the first battery cell 2 and causing a short circuit in the battery cell 100 , thereby improving the safety of the battery.

[0070] It is worth noting that the first insulating member 41 and the second insulating member 42 can independently be insulating tape, insulating sponge, insulating rubber, etc., which is not limited here.

[0071] In some embodiments, as shown in Figures 5 and 6, the second tab group 22 is electrically connected to the fourth tab group 31 through the first connecting piece 51. As shown in Figure 7, the third tab group 23 is electrically connected to the fifth tab group 32 through the second connecting piece 52. One of the first connecting piece 51 and the second connecting piece 52 is electrically connected to the housing 1.

[0072] This makes it easier to connect the second tab group 22 to the fourth tab group 31, and to connect the third tab group 23 to the fifth tab group 32. One of the first connecting piece 51 and the second connecting piece 52 is electrically connected to the housing 1. For example, the first connecting piece 51 is electrically connected to the housing 1, or the second connecting piece 52 is electrically connected to the housing 1. Thus, one of the first connecting piece 51 and the second connecting piece 52 cooperates with the pole 11 to lead out the two electrodes of the first battery cell 2, respectively, thereby reducing the difficulty of leading out the two electrodes of the first battery cell 2.

[0073] In some embodiments, the first end of the second tab group 22 and the second end of the fourth tab group 31 are bent and extended in a direction away from each other, and the two ends of the first connecting piece 51 (such as the first end 511 of the first connecting piece and the second end 512 of the first connecting piece in Figure 6) are electrically connected to the first end and the second end, respectively.

[0074] Thus, the space occupied by the first end of the second tab group 22 and the second end of the fourth tab group 31 can be reduced, and the connection stability between the first connecting piece 51 and the first end and the second end can be enhanced.

[0075] Specifically, when the first connecting piece 51 is electrically connected to the first end of the second electrode tab group 22 and the second end of the fourth electrode tab group 31 , welding may be used.

[0076] During actual welding, as shown in Figure 4, since the first battery cell 2 and the second battery cell 3 are spaced apart and distributed in the length direction of the battery cell 100, and the second pole tab group 22 extends toward the second battery cell 3, and the fourth pole tab group 31 extends toward the first battery cell 2, then the two ends of the first connecting piece 51 can be welded to the first end and the second end respectively. At this time, the width direction of the first connecting piece 51 is the length direction of the battery cell 100. Then, the first battery cell 2 and the second battery cell 3 are squeezed toward each other so that the first end of the second pole tab group 22 and the second end of the fourth pole tab group 31 are bent and extended away from each other along the thickness direction of the battery cell 100 (such as the Z direction in Figure 1), so that the first connecting piece 51 is deformed, thereby reducing the space occupied by the first connecting piece 51, thereby improving the volume energy density of the battery cell 100.

[0077] In some embodiments, the third end of the third tab group 23 and the fourth end of the fifth tab group 32 are bent and extended in a direction away from each other, and the two ends of the second connecting piece 52 (such as the first end 521 of the second connecting piece and the second end 522 of the second connecting piece in Figure 7) are electrically connected to the third end and the fourth end, respectively.

[0078] Thus, the space occupied by the third end of the third tab group 23 and the fourth end of the fifth tab group 32 can be reduced, and the connection stability between the second connecting piece 52 and the third and fourth ends can be enhanced.

[0079] Specifically, welding may be used when the second connecting piece 52 is electrically connected to the third end of the third tab group 23 and the fourth end of the fifth tab group 32 .

[0080] During actual welding, as shown in Figure 4, since the first battery cell 2 and the second battery cell 3 are spaced apart and distributed in the length direction of the battery cell 100, and the third pole tab group 23 extends toward the second battery cell 3, and the fifth pole tab group 32 extends toward the first battery cell 2, then the two ends of the second connecting piece 52 can be welded to the third end and the fourth end respectively. At this time, the width direction of the second connecting piece 52 is the length direction of the battery cell 100. Then, the first battery cell 2 and the second battery cell 3 are squeezed toward each other so that the third end of the third pole tab group 23 and the fourth end of the fifth pole tab group 32 are bent and extended away from each other along the thickness direction of the battery cell 100 (such as the Z direction in Figure 1), so that the second connecting piece 52 is deformed, thereby reducing the space occupied by the second connecting piece 52, so as to improve the volume energy density of the battery cell 100.

[0081] In some embodiments, as shown in FIG. 8 , the housing 1 is provided with a liquid injection hole 12 for injecting liquid into the housing 1 , and the battery cell 100 further includes a sealing assembly 6 for sealing the liquid injection hole 12 .

[0082] Thus, the injection hole 12 is provided to facilitate the injection of electrolyte into the battery cell 100. After the electrolyte injection into the battery cell 100 is completed, the injection hole 12 can be sealed with the sealing assembly 6.

[0083] For example, as shown in FIG4 , the injection hole 12 can be set between the first tab group 21 and the second tab group 22 . This arrangement can avoid interference when injecting liquid into the battery cell 100 and facilitate subsequent injection. Of course, the injection hole 12 can also be set at other locations.

[0084] In some embodiments, as shown in FIG8 , the sealing assembly 6 includes a sealing plug 61 and a sealing cover 62 . The sealing plug 61 cooperates with the liquid injection hole 12 to seal the liquid injection hole 12 . The sealing cover 62 is disposed on the outer wall of the housing 1 and covers the sealing plug 61 .

[0085] Thus, after the liquid is injected, the sealing plug 61 is first inserted into the liquid injection hole 12, and then the sealing cover 62 is pressed onto the sealing plug 61, and the sealing cover 62 is fixed to the outer wall of the shell body 101 to seal the liquid injection hole 12. The sealing plug 61 and the liquid injection hole 12 can be an interference fit, and when the sealing cover 62 is pressed onto the sealing plug 61, the sealing plug 61 will be squeezed. This design can improve the sealing performance of the battery. Specifically, the sealing cover 62 and the shell body 101 can be fixedly connected by welding.

[0086] In some embodiments, the sealing plug 61 is a flexible member, and the sealing cover 62 is in contact with the sealing plug 61 .

[0087] As a result, when the sealing cover 62 is pressed onto the sealing plug 61, the sealing plug 61 will be squeezed, so that the sealing plug 61 and the injection hole 12 can be interference fit, and this design can improve the sealing performance of the battery.

[0088] In some embodiments, as shown in FIG. 4 or FIG. 9 , the second tab group 22 is located between the first tab group 21 and the third tab group 23 , and the injection hole 12 is located between the pole 11 and the second tab group 22 .

[0089] Thus, interference during liquid injection into the battery cell 100 can be avoided, facilitating subsequent liquid injection.

[0090] According to an embodiment of the present application, the battery cell 100 includes a housing 1, a first battery cell 2 and a second battery cell 3. The first battery cell 2 is provided with a first tab group 21, a second tab group 22 and a third tab group 23. The second battery cell 3 is provided with a fourth tab group 31 and a fifth tab group 32.

[0091] As shown in FIG4 , the first tab group 21 , the second tab group 22 and the third tab group 23 are spaced apart and distributed in the width direction Y of the battery cell 100 . The fourth tab group 31 and the fifth tab group 32 are also in the width direction Y of the battery cell 100 . In the length direction X of the battery cell 100 , the projection of the fourth tab group 31 falls between the first tab group 21 and the second tab group 22 , and the projection of the fifth tab group 32 falls between the second tab group 22 and the third tab group 23 .

[0092] Among them, the first pole tab group 21 is electrically connected to the pole column 11, the second pole tab group 22 is electrically connected to the fourth pole tab group 31 through the first connecting piece 51, the third pole tab group 23 is electrically connected to the fifth pole tab group 32 through the second connecting piece 52, and one of the first connecting piece 51 and the second connecting piece 52 is electrically connected to the shell 1.

[0093] In this way, the two battery cells are electrically connected via the connecting piece. The special-shaped battery cell 100 prepared in this way can improve the utilization rate of materials, reduce the difficulty of preparing the battery cell, and thus reduce the preparation cost of the battery cell 100.

[0094] This application also proposes a battery.

[0095] The battery according to the embodiment of the present application includes: a box and a plurality of battery cells 100. The plurality of battery cells 100 are arranged in the box, and the battery cells 100 are the battery cells 100 of any of the above embodiments.

[0096] According to the battery of the embodiment of the present application, its battery cell 100 is provided with a first battery cell 2 and a second battery cell 3, and the two battery cells are electrically connected to facilitate the preparation of a special-shaped battery cell 100. The special-shaped battery cell 100 prepared in this way can improve the utilization rate of materials, reduce the difficulty of preparing the battery cell, and thus reduce the preparation cost of the battery cell 100.

[0097] The present application also proposes an electrical device.

[0098] The electric device according to the embodiment of the present application includes the battery cell 100 according to any one of the above embodiments or the battery according to the above embodiments.

[0099] For example, the electric device may be a mobile electronic device or a vehicle, and when using the battery cell 100 or battery according to any of the above embodiments, the use requirements of the battery cell 100 or battery with an irregular shape can be met.

[0100] According to the electrical equipment of the embodiment of the present application, its battery cell 100 or battery is provided with a first battery cell 2 and a second battery cell 3, and the two battery cells are electrically connected to facilitate the preparation of a special-shaped battery cell 100, and the special-shaped battery cell 100 prepared in this way can improve the utilization rate of materials, reduce the difficulty of preparing the battery cell, and thus reduce the preparation cost of the battery cell 100.

[0101] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and 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 to the present application.

[0102] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means more than two, unless otherwise specifically defined.

[0103] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.

[0104] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0105] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0106] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A battery cell (100), wherein: include: A housing (1), wherein the housing (1) is provided with a pole (11); A first battery cell (2) and a second battery cell (3), wherein the first battery cell (2) and the second battery cell (3) are respectively arranged in the housing (1), the first battery cell (2) is provided with a first pole lug group (21), a second pole lug group (22) and a third pole lug group (23), the second battery cell (3) is provided with a fourth pole lug group (31) and a fifth pole lug group (32), the first pole lug group (21) is electrically connected to the pole column (11), one of the second pole lug group (22) and the third pole lug group (23) is electrically connected to the housing (1), the second pole lug group (22) is electrically connected to the fourth pole lug group (31), and the third pole lug group (23) is electrically connected to the fifth pole lug group (32).

2. The battery cell (100) according to claim 1, wherein: The first electrode lug group (21), the second electrode lug group (22) and the third electrode lug group (23) are located on a first side of the first battery cell (2); The fourth electrode tab group (31) and the fifth electrode tab group (32) are located on the first side of the second battery cell (3), and the first side of the first battery cell (2) and the first side of the second battery cell (3) are arranged opposite to each other.

3. The battery cell (100) according to any one of claims 1 to 2, wherein: A first insulating member (41) is provided between the fourth electrode tab group (31) and the first battery core (2); and / or A second insulating member (42) is provided between the fifth electrode tab group (32) and the first battery core (2).

4. The battery cell (100) according to any one of claims 1 to 3, wherein: The second electrode tab group (22) is electrically connected to the fourth electrode tab group (31) via a first connecting piece (51), the third electrode tab group (23) is electrically connected to the fifth electrode tab group (32) via a second connecting piece (52), and one of the first connecting piece (51) and the second connecting piece (52) is electrically connected to the housing (1).

5. The battery cell (100) according to claim 4, wherein: The first end of the second electrode tab group (22) and the second end of the fourth electrode tab group (31) are bent and extended in a direction away from each other, and the two ends of the first connecting piece (51) are electrically connected to the first end and the second end respectively.

6. The battery cell (100) according to any one of claims 4 to 5, wherein: The third end of the third electrode tab group (23) and the fourth end of the fifth electrode tab group (32) are bent and extended in a direction away from each other, and the two ends of the second connecting piece (52) are electrically connected to the third end and the fourth end respectively.

7. The battery cell (100) according to any one of claims 1 to 6, wherein: The housing (1) is provided with a liquid injection hole (12) for injecting liquid into the housing (1); The battery cell (100) further comprises a sealing assembly (6) for sealing the liquid injection hole (12).

8. The battery cell (100) according to claim 7, wherein: The sealing assembly (6) comprises: a sealing plug (61), the sealing plug (61) cooperates with the liquid injection hole (12) to seal the liquid injection hole (12); A sealing cover (62), wherein the sealing cover (62) is disposed on the outer wall of the housing (1) and covers the sealing plug (61).

9. The battery cell (100) according to claim 8, wherein: The sealing plug (61) is a flexible member, and the sealing cover (62) is in contact with the sealing plug (61).

10. The battery cell (100) according to any one of claims 7 to 9, wherein: The second electrode tab group (22) is located between the first electrode tab group (21) and the third electrode tab group (23), and the injection hole (12) is located between the pole column (11) and the second electrode tab group (22).

11. A battery, wherein: include: Box; A plurality of battery cells (100), wherein the plurality of battery cells (100) are arranged in the box body, and the battery cells (100) are the battery cells (100) according to any one of claims 1 to 10.

12. An electrical device, wherein: The invention comprises a battery cell (100) according to any one of claims 1 to 10 or a battery according to claim 11.

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