Battery cell assembly, battery and electrical device

Abstract

Disclosed in the present application are a battery cell assembly (100), a battery (200), and an electrical device (300). The battery cell assembly (100) comprises a first cell (10) and a second cell (20). The first cell (10) comprises a first tab (11), a second tab (12), a third tab (13), and a fourth tab (14). The second cell (20) comprises a fifth tab (21) and a sixth tab (22). The first tab (10) and the second tab (20) are distributed in the length direction. The third tab (13) is electrically connected to the fifth tab (21). The fourth tab (14) is electrically connected to the sixth tab (22). The first tab (11) and the second tab (12) are configured to be electrically connected to an external element.

Description

Battery cell components, batteries and electrical equipment

[0001] Priority information

[0002] This application claims priority and benefits of patent application No. 2023226804973 filed with the State Intellectual Property Office of China on September 28, 2023, and the entire text of which is incorporated herein by reference. Technical Field

[0003] The present invention relates to the technical field of batteries, and in particular to a battery core assembly, a battery and an electrical device. Background Art

[0004] With the advancement of science and technology, batteries are widely used in various electronic devices to provide power. Batteries for these devices need to maximize battery capacity within a smaller space, increasing their energy density. Consequently, irregularly shaped batteries, or special-shaped batteries, are becoming increasingly common. The current approach to special-shaped batteries is to prepare shaped pole pieces that match the battery's shape and then laminate them into battery cells. However, the preparation of these shaped pole pieces results in low material utilization, making battery cell production more difficult and increasing production costs.

[0005] Summary of the Invention

[0006] Embodiments of the present application provide a battery cell assembly, a battery, and an electrical device.

[0007] The battery cell assembly of the embodiment of the present application includes a first battery cell and a second battery cell, the first battery cell includes a first pole tab, a second pole tab, a third pole tab and a fourth pole tab; the second battery cell includes a fifth pole tab and a sixth pole tab, the first battery cell and the second battery cell are distributed along the length direction, the third pole tab and the fifth pole tab are electrically connected, the fourth pole tab and the sixth pole tab are electrically connected, and the first pole tab and the second pole tab are configured to be electrically connected to external components.

[0008] In the battery cell assembly of the embodiment of the present application, the battery cell assembly includes a first battery cell and a second battery cell, the first battery cell includes a first pole tab, a second pole tab, a third pole tab and a fourth pole tab, the second battery cell includes a fifth pole tab and a sixth pole tab, the first battery cell and the second battery cell are distributed along the length direction, the third pole tab and the fifth pole tab are electrically connected, the fourth pole tab and the sixth pole tab are electrically connected, and the first pole tab and the second pole tab are configured to be electrically connected to an external component. In this way, the battery cell assembly can form a power supply unit for storing electrical energy through the first battery cell and the second battery cell. The first battery cell and the second battery cell are connected together through the pole tabs to form a special-shaped battery, thereby maximizing the utilization of space. At the same time, dividing the battery cell assembly into two batteries can reduce the difficulty of preparation, improve the utilization of materials, and reduce the preparation cost.

[0009] In certain embodiments, the first, second, third, and fourth tabs are spaced apart in the width direction, and the fifth and sixth tabs are spaced apart in the width direction. Thus, the first battery cell can be positioned on one side of the second battery cell, with the first and second cells arranged along the length direction. Furthermore, the first and second tabs can be connected to external components, allowing the external components and the second cell to be placed on one side of the first cell simultaneously, thereby improving space utilization.

[0010] In certain embodiments, the battery cell assembly includes an adapter that connects the first battery cell and the second battery cell. The adapter includes a first connector and a second connector. The first connector is configured to electrically connect the third tab and the fifth tab, and the second connector is configured to electrically connect the fourth tab and the sixth tab. In this way, the first connector and the second connector can facilitate the connection of different tabs, ensuring a stable connection between the first and second battery cells.

[0011] In certain embodiments, both the first and second cells are rectangular. By assembling the two cells into a cell within a special-shaped battery, the need to die-cut the electrode sheets into specific shapes can be avoided, reducing material waste and improving material utilization. This can also improve space utilization and increase the battery's energy density.

[0012] In certain embodiments, the first, second, third, and fourth tabs are disposed on a side of the first cell that is close to the second cell, and the fifth and sixth tabs are disposed on a side of the second cell that is close to the first cell. This shortens the distance between the two tabs to be connected, facilitates interconnection, simplifies connection difficulty, saves connection materials, and reduces connection costs.

[0013] In certain embodiments, when the first and second battery cells are fixedly connected, the third and fifth tabs are staggered, and the fourth and sixth tabs are staggered. This further reduces the space occupied by the gap between the first and second battery cells, allowing the first and second cells to be closer together, thereby improving space utilization within the battery.

[0014] In certain embodiments, the first connector includes a first connecting portion, a second connecting portion, and a first transition portion connecting the first and second connecting portions, respectively. The first connecting portion is used to electrically connect to the third tab, and the second connecting portion is used to electrically connect to the fifth tab. Thus, the third and fifth tabs are electrically connected via the first connecting piece.

[0015] In certain embodiments, the second connector includes a third connecting portion, a fourth connecting portion, and a second transition portion connecting the third and fourth connecting portions, respectively. The third connecting portion is used to electrically connect to the fourth tab, and the fourth connecting portion is used to electrically connect to the sixth tab. Thus, the fourth and sixth tabs are electrically connected via the second connecting piece.

[0016] In some embodiments, the third pole tab is provided with a first extension portion, the first extension portion is formed with a first surface and a second surface opposite to each other, the first extension portion is bent so that the first surface is close to the first battery cell, the fourth pole tab is provided with a second extension portion, the second extension portion is formed with a third surface and a fourth surface opposite to each other, the second extension portion is bent so that the third surface is close to the first battery cell, the fifth pole tab is provided with a third extension portion, the third extension portion is formed with a fifth surface and a sixth surface opposite to each other, the third extension portion is bent so that the fifth surface is close to the second battery cell, the sixth pole tab is provided with a fourth extension portion, and the The fourth extension is formed with a seventh and eighth surfaces facing each other. The fourth extension is bent so that the seventh surface is adjacent to the second battery cell. In the thickness direction, the first and second extensions are adjacent to the upper surface of the first battery cell, and the third and fourth extensions are adjacent to the lower surface of the second battery cell. The first connecting portion is fixedly connected to the first or second surface; and / or the second connecting portion is fixedly connected to the fifth or sixth surface; and / or the third connecting portion is fixedly connected to the third or fourth surface; and / or the fourth connecting portion is fixedly connected to the seventh or eighth surface. In this way, the tab and the connector are connected together by welding, and the extension can be easily attached to the connector while leaving space for the welding clamp to avoid affecting the welding process. Furthermore, after the connector and tab are welded, the extension can be bent and retracted toward the battery cell, thereby saving space and improving space utilization.

[0017] In some embodiments, the first and second tabs have opposite electrical properties, the third and fourth tabs have opposite electrical properties, and the fifth and sixth tabs have opposite electrical properties. Thus, by setting the electrical properties of the two cell tabs and interconnecting the two cell tabs with corresponding electrical properties, the first and second cells can be connected in series to form a power supply unit for storing electrical energy, such as a heterogeneous battery.

[0018] The battery of the embodiment of the present application includes a first cover, a second cover, a shell body and the battery cell assembly described in any one of the above embodiments, the first cover, the shell body and the second cover are connected in sequence to define an accommodating space, and the battery cell assembly is arranged in the accommodating space.

[0019] In certain embodiments, the housing is provided with a pole assembly, which is positioned opposite and electrically connected to the first tab. This allows the pole assembly to be electrically connected to the first tab. Furthermore, the pole assembly can be positioned between the first and second battery cells in the housing, allowing it to connect to an external electrical component. This electrical component can be positioned alongside the second battery cell on one side of the first battery cell, resulting in higher space utilization.

[0020] In some embodiments, the housing body is further provided with an injection port, which is located on the same side of the housing body as the terminal assembly. This allows electrolyte to be injected through the injection port, which is then sealed by a sealing assembly that engages with the injection port. Placing the sealing assembly and injection port on the same side of the terminal assembly improves space utilization.

[0021] The electric device in the embodiment of the present application includes the battery described in the above embodiment.

[0022] In the battery cell assembly, battery and electrical equipment of the embodiment of the present application, the battery cell assembly includes a first battery cell and a second battery cell, the first battery cell includes a first pole tab, a second pole tab, a third pole tab and a fourth pole tab, the second battery cell includes a fifth pole tab and a sixth pole tab, the first battery cell and the second battery cell are distributed along the length direction, the third pole tab and the fifth pole tab are electrically connected, the fourth pole tab and the sixth pole tab are electrically connected, and the first pole tab and the second pole tab are configured to be electrically connected to an external component. In this way, the battery cell assembly can form a power supply unit for storing electrical energy through the first battery cell and the second battery cell, and the first battery cell and the second battery cell are connected together through the pole tabs to form a special-shaped battery, thereby maximizing the utilization of space. At the same time, dividing the battery cell assembly into two batteries can reduce the difficulty of preparation, improve the utilization of materials, and reduce the preparation cost.

[0023] 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

[0024] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments with reference to the following drawings, in which:

[0025] FIG1 is a schematic structural diagram of a battery according to an embodiment of the present application;

[0026] FIG2 is a schematic diagram of a partial structure of a battery according to an embodiment of the present application;

[0027] FIG3 is a schematic structural diagram of a battery cell assembly according to an embodiment of the present application;

[0028] FIG4 is an enlarged structural diagram of A in FIG2 according to an embodiment of the present application;

[0029] FIG5 is another structural schematic diagram of a battery cell assembly according to an embodiment of the present application;

[0030] FIG6 is another schematic structural diagram of a battery cell assembly according to an embodiment of the present application;

[0031] FIG7 is an enlarged structural diagram of B in FIG3 according to an embodiment of the present application;

[0032] FIG8 is another enlarged structural diagram of B in FIG3 according to an embodiment of the present application;

[0033] FIG9 is another structural schematic diagram of a battery cell assembly according to an embodiment of the present application;

[0034] FIG10 is another structural schematic diagram of a battery cell assembly according to an embodiment of the present application;

[0035] FIG11 is another structural schematic diagram of a battery cell assembly according to an embodiment of the present application;

[0036] FIG12 is a schematic diagram of an exploded structure of a battery according to an embodiment of the present application;

[0037] FIG13 is a schematic diagram of an electrical device according to an embodiment of the present application.

[0038] Description of the main component symbols: Battery cell assembly 100, first battery cell 10, first tab 11, second tab 12, third tab 13, first extension 131, first surface 132, second surface 133, fourth tab 14, second extension 141, third surface 142, fourth surface 143, second battery cell 20, fifth tab 21, third extension 211, fifth surface 212, sixth surface 213, sixth tab 22, fourth extension 221, seventh surface 222, Eight sides 223, adapter 30, first connecting member 31, first connecting portion 311, first transition portion 312, second connecting portion 312, second connecting member 32, third connecting portion 321, second transition portion 322, fourth connecting portion 323, battery 200, first cover 201, shell body 202, second cover 203, accommodating space 204, pole assembly 205, sealing assembly 206, liquid injection hole 207, electrical equipment 300. DETAILED DESCRIPTION

[0039] The embodiments of the present invention are described in detail below, 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 only used to explain the present invention, and are not to be construed as limiting the present invention.

[0040] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0041] The disclosure below provides many different embodiments or examples for realizing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present application. In addition, the present application may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplicity and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those of ordinary skill in the art will appreciate the application of other processes and / or the use of other materials.

[0042] Referring to Figures 1, 2 and 3, the battery cell assembly 100 of the embodiment of the present application includes a first battery cell 10 and a second battery cell 20. The first battery cell 10 includes a first pole tab 11, a second pole tab 12, a third pole tab 13 and a fourth pole tab 14; the second battery cell 20 includes a fifth pole tab 21 and a sixth pole tab 22. The first battery cell 10 and the second battery cell 20 are distributed along the length direction, the third pole tab 13 and the fifth pole tab 21 are electrically connected, the fourth pole tab 14 and the sixth pole tab 22 are electrically connected, and the first pole tab 11 and the second pole tab 12 are configured to be electrically connected to external components.

[0043] In the battery cell assembly 100 of the embodiment of the present application, the battery cell assembly 100 includes a first battery cell 10 and a second battery cell 20. The first battery cell 10 includes a first electrode tab 11, a second electrode tab 12, a third electrode tab 13, and a fourth electrode tab 14; the second battery cell 20 includes a fifth electrode tab 21 and a sixth electrode tab 22. The first battery cell 10 and the second battery cell 20 are arranged along the length direction. The third electrode tab 13 is electrically connected to the fifth electrode tab 21, and the fourth electrode tab 14 is electrically connected to the sixth electrode tab 22. The first electrode tab 11 and the second electrode tab 12 are configured to electrically connect to external components. In this way, the battery cell assembly 100 can form a power supply unit that stores electrical energy using the first battery cell 10 and the second battery cell 20. The first battery cell 10 and the second battery cell 20 are connected together by the electrode tabs to form a special-shaped battery, thereby maximizing space utilization. At the same time, dividing the battery cell assembly 100 into two battery cells can reduce the difficulty of production, improve material utilization, and reduce production costs.

[0044] In related technologies, the development of mobile electronic devices has led to the emergence of an increasing number of irregularly shaped batteries. The current method for these batteries involves preparing shaped pole pieces that match the battery's shape and then laminating them into battery cells. However, the preparation of these shaped pole pieces results in low material utilization and increased manufacturing costs.

[0045] In the embodiment of the present application, the battery cell assembly 100 includes a first battery cell 10 and a second battery cell 20. By preparing two simple battery cells and then electrically connecting them via tabs, they form a specific "special-shaped electrode sheet." This greatly reduces the difficulty of preparing special-shaped batteries and maximizes control utilization.

[0046] It should be noted that the first electrode tab 11 and the second electrode tab 12 are configured to be electrically connected to an external component, which means that the first electrode tab 11 and the second electrode tab 12 can be directly or indirectly connected to the external component. For example, the first electrode tab 11 can be electrically connected to the external component through a terminal.

[0047] In some embodiments, the first electrode tab 11 , the second electrode tab 12 , the third electrode tab 13 , and the fourth electrode tab 14 are spaced apart in the width direction, and the fifth electrode tab 21 and the sixth electrode tab 22 are spaced apart in the width direction.

[0048] In this way, the first battery cell 10 can be arranged on one side of the second battery cell 20, and the first battery cell 10 and the second battery cell 20 are arranged along the length direction. At the same time, the first electrode tab 11 and the second electrode tab 12 can be connected to external components, so that the external components and the second battery cell 20 are placed on one side of the first battery cell 10 at the same time, thereby improving space utilization.

[0049] In some embodiments, the battery cell assembly 100 includes an adapter 30, which connects the first battery cell 10 and the second battery cell 20. The adapter 30 includes a first connector 31 and a second connector 32. The first connector 31 is configured to electrically connect the third pole tab 13 and the fifth pole tab 21, and the second connector 32 is configured to electrically connect the fourth pole tab 14 and the sixth pole tab 22.

[0050] In this way, the first connector 31 and the second connector 32 can facilitate the connection of different tabs, ensuring a stable connection between the first battery cell 10 and the second battery cell 20 .

[0051] 2 and 3 , in some embodiments, the first battery cell 20 and the second battery cell 30 are both rectangular.

[0052] In this way, by assembling two rectangular cells into the cell inside the special-shaped battery, the electrode pieces can be prevented from being die-cut into special-shaped special-shaped electrode pieces, which can reduce material waste and improve material utilization. At the same time, it can also improve space utilization and increase the energy density of the battery 200.

[0053] Specifically, the first battery cell 10 includes a first tab 11, a second tab 12, a third tab 13, and a fourth tab 14 spaced apart along the width direction, and the second battery cell 20 includes a fifth tab 21 and a sixth tab 22 spaced apart along the width direction. The first battery cell 20 and the second battery cell 30 are further distributed along the length direction. In this way, a battery 200 with a reasonable spatial distribution and high space utilization can be formed.

[0054] In the embodiment of the present application, there is no limitation on the preparation method of the first battery cell 10 or the second battery cell 20 to meet different needs. For example, the first battery cell 10 or the second battery cell 20 can be prepared by a winding or lamination process, that is, the first battery cell 10 and the second battery cell 20 can both be prepared by winding; or the first battery cell 10 and the second battery cell 20 can both be prepared by lamination; or the first battery cell 10 is prepared by winding and the second battery cell 20 is prepared by lamination; or the first battery cell 10 is prepared by lamination and the second battery cell 20 is prepared by winding.

[0055] Please refer to Figures 2, 3 and 4. In some embodiments, the first pole tab 11, the second pole tab 12, the third pole tab 13 and the fourth pole tab 14 are arranged on the side of the first battery cell 10 close to the second battery cell 20, and the fifth pole tab 21 and the sixth pole tab 22 are arranged on the side of the second battery cell 20 close to the first battery cell 10.

[0056] In this way, the connection distance between the two tabs that need to be connected can be shortened, making it easier to connect them to each other, simplifying the connection difficulty, saving connection materials, and reducing connection costs.

[0057] Specifically, when arranging the battery cells, the tabs of the first battery cell 10 can be oriented toward the second battery cell 20, while the tabs of the second battery cell 20 can be oriented toward the first battery cell 10. This allows the tabs of the first and second battery cells 10, 20 to be connected to be closer together, making it easier to connect the first and second battery cells 10, 20 to form a power supply unit for storing electrical energy, such as a special-shaped battery. This simplifies the connection process, saves connection materials, and reduces connection costs.

[0058] Please refer to Figures 2, 3 and 5. In some embodiments, the tabs of the first battery cell 10 can be arranged in the order of the first tab 11, the second tab 12, the third tab 13 and the fourth tab 14 in the width direction. In other embodiments, the first tab 11 and the second tab 12 on the first battery cell 10 can be respectively arranged on both sides of the battery width direction, and the third tab 13 and the fourth tab 14 are arranged between the first tab 11 and the second tab 12. The specific details are not limited here.

[0059] Further, referring to FIG. 2 and FIG. 6 , in some embodiments, when the first battery cell 10 and the second battery cell 20 are fixedly connected, the third electrode tab 13 and the fifth electrode tab 21 are alternately arranged, and the fourth electrode tab 14 and the sixth electrode tab 31 are alternately arranged.

[0060] In this way, the space occupied by the connection position of the first battery cell 10 and the second battery cell 20 can be further reduced, so that the position relationship between the first battery cell 10 and the second battery cell 20 can be closer, thereby improving the space utilization inside the battery.

[0061] For example, the third tab 13 of the first battery cell 10 and the fifth tab 21 of the second battery cell 20 are spaced apart in the width direction of the battery, and the third tab 13 and the fifth tab 21 are electrically connected via a first connector 31. The fourth tab 14 of the first battery cell 10 and the sixth tab 22 of the second battery cell 20 are spaced apart in the width direction of the battery, and the fourth tab 14 and the sixth tab 22 are electrically connected via a second connector 32. In other words, the third tab 13 and the fourth tab 14 of the first battery cell 10 are spaced apart so that the space between the third tab 13 and the fourth tab 14 can accommodate both the fifth tab 21 and the sixth tab 22 of the second battery cell 20. In this case, the top of the third tab 13 and the top of the fifth tab 21 are staggered, and their projections in the width direction partially overlap. The top of the fourth tab 14 and the top of the sixth tab 22 are staggered, and their projections in the width direction partially overlap. In this way, the space occupied by the connection position between the first battery cell 10 and the second battery cell 20 is reduced, thereby improving the space utilization inside the battery.

[0062] Please refer to Figures 4, 7 and 8. In some embodiments, the first connecting member 31 includes a first connecting portion 311, a second connecting portion 313 and a first transition portion 312 respectively connecting the first connecting portion 311 and the second connecting portion 313. The first connecting portion 311 is used to electrically connect to the third pole tab 13, and the second connecting portion 313 is used to electrically connect to the fifth pole tab 21.

[0063] Further, referring to Figures 4, 7 and 8, in some embodiments, the second connecting member 32 includes a third connecting portion 321, a fourth connecting portion 323 and a second transition portion 322 respectively connecting the third connecting portion 321 and the fourth connecting portion 323, the third connecting portion 321 is used to electrically connect to the fourth pole ear 14, and the fourth connecting portion 323 is used to electrically connect to the sixth pole ear 22.

[0064] In this way, the third electrode tab 13 and the fifth electrode tab 21 are electrically connected through the first connector 31, and the fourth electrode tab 14 and the sixth electrode tab 22 are electrically connected through the second connector 32. In this way, the first battery cell 10 and the second battery cell 20 can be connected in series to form a power supply unit for storing electrical energy.

[0065] Specifically, the connecting portion is electrically connected to the tab, and the connecting portion is attached to the outside of the tab, or the connecting portion is clamped to the tab. When the connecting portion is attached to the outside of the tab, the electrical connection can be made by welding or conductive adhesive bonding, which is not limited in this application to meet different needs.

[0066] 2 and 4 , in one embodiment, the first connecting portion 311 of the first connector 31 is bonded to the outer side of the third electrode tab 13, and the second connecting portion 313 is bonded to the outer side of the fifth electrode tab 22. In other words, the first connecting portion 311 is bonded to the top of the third electrode tab 13, and the second connecting portion 313 is bonded to the top of the fifth electrode tab 22.

[0067] It should be noted that, in the embodiments of the present application, the manner in which the connector is connected to the tab is not limited. For example, the connector may be connected by welding or conductive adhesive bonding to meet various requirements.

[0068] In one embodiment, taking the second connector 32 as an example, the third connecting portion 321 of the second connector 32 is clamped on the fourth pole ear 14, the fourth connecting portion 323 is clamped on the sixth pole ear 22, or the third connecting portion 321 is clamped on the fourth pole ear 14, and the fourth connecting portion 323 is fitted and connected to the outer side of the sixth pole ear 22. It can also be that the third connecting portion 321 is fitted on the outer side of the fourth pole ear 14, and the fourth connecting portion 323 is clamped on the sixth pole ear 22, or the outer side of the third connecting portion 321 is fitted and connected to the fourth pole ear 14, and the fourth connecting portion 323 is fitted and connected to the outer side of the sixth pole ear 22, and multiple battery cell electrical connection methods, the above-mentioned multiple connection methods can also be adopted at the first connector 31, which is not limited in this application to meet various needs.

[0069] In some embodiments, the tops of the tabs of the two battery cells are staggered, and their projections in the width direction overlap. In this case, the first transition portion 312 is bent so that the first connection portion 311 and the second connection portion 313 can be connected to the tops of the tabs respectively; or the first transition portion 312 is flattened, and the first connection portion 311 and the second connection portion 313 can be clamped in the two tabs respectively. In this case, the first transition portion 312 can be straight to connect the first connection portion 311 and the second connection portion 313, which can reduce the difficulty of preparing the connector; or one of the two connection portions in the same connector is connected to the top of the tab, and the other connection portion is clamped in the other tab. In this case, the transition portion can be straight. If it is necessary to further reduce the connection gap between the two battery cells, a connector with a bent transition portion can also be used to further reduce the connection gap between the battery cells. This is not limited in this application and will not be elaborated on in detail here. In this way, in the above embodiment, the tops of the tabs of the two battery cells are staggered, and their projections in the width direction overlap. In this way, the gap space between the two battery cells can be further reduced.

[0070] At the same time, the first pole ear 11 and the second pole ear 12 can be arranged on the same side of the third pole ear 13 and the fourth pole ear 14. In this way, the battery space is smaller and the shape is more regular. In today's lightweight and portable electrical equipment, the internal space of the electrical equipment can be saved. The saved space is conducive to the installation of other components and is also convenient for the storage and further stacking of batteries, such as stacking into large batteries such as automotive power batteries.

[0071] In addition, after the third tab 13 is connected to the first connector 31, insulating tape (not shown) is provided on both sides of the third tab 13 in the thickness direction to prevent the third tab 13 or the first connector 31 from contacting the second battery cell 20 and causing a battery short circuit, thereby improving battery safety. It should be noted that after the fifth tab 21 is connected to the first connector 31, the fourth tab 14 is connected to the second connector 32, and the sixth tab 22 is connected to the second connector 32, respectively, insulating tape can also be provided on both sides of the fifth tab 21 in the thickness direction.

[0072] Referring to Figures 9 to 11, in some embodiments, the third tab 13 is provided with a first protruding portion 131, the first protruding portion 131 is formed with a first surface 132 and a second surface 133 opposite to each other, the first protruding portion 131 is bent so that the first surface 132 is close to the first battery cell 10, the fourth tab 14 is provided with a second protruding portion 141, the second protruding portion 141 is formed with a third surface 142 and a fourth surface 143 opposite to each other, the second protruding portion 141 is bent so that the third surface 142 is close to the first battery cell 10, the fifth tab 21 is provided with a third protruding portion 211, the third protruding portion 211 is formed with a fifth surface 212 and a sixth surface 213 opposite to each other, the third protruding portion 211 is bent so that the fifth surface 212 is close to the second battery cell 20, and the sixth tab 22 is provided with a third protruding portion 211. A fourth extending portion 221 is provided, and the fourth extending portion 221 forms a seventh surface 222 and an eighth surface 223 opposite to each other. The fourth extending portion 221 is bent so that the seventh surface 222 is close to the second battery cell 20. In the thickness direction, the first extending portion 131 and the second extending portion 141 are close to the upper surface of the first battery cell 10, and the third extending portion 211 and the fourth extending portion 221 are close to the lower surface of the second battery cell 20; the first connecting portion 311 is fixedly connected to the first surface 132 or the second surface 133; and / or the second connecting portion 312 is fixedly connected to the fifth surface 212 or the sixth surface 213; and / or the third connecting portion 321 is fixedly connected to the third surface 142 or the fourth surface 143; and / or the fourth connecting portion 323 is fixedly connected to the seventh surface 222 or the eighth surface 223.

[0073] In this way, the tab and the connector are connected together by welding, and the extension can be easily attached to the connector, while leaving space for the welding clamp to avoid affecting the welding process. At the same time, after the connector and the tab are welded, the extension can be bent and retracted toward the battery cell where it is located, thereby saving space and improving space utilization.

[0074] For example, in the thickness direction, the first extension 131 and the second extension 141 are located near the upper surface of the first battery cell 10 and can be bent downward, while the third extension 211 and the fourth extension 221 are located near the lower surface of the second battery cell 20 and can be bent upward. Thus, the first extension 131 and the third extension 211 are connected together by the first connector 31 and then bent, while the second extension 141 and the fourth extension 221 are connected together by the second connector 32 and then bent. This allows the first battery cell 10 and the second battery cell 20 to be located on the same plane, thus avoiding wasted space and improving space utilization.

[0075] In conjunction with Figure 9, the first surface 132 and the fifth surface 212 can be connected by a first connector 31. At the same time, the first extension 131 and the third extension 211 are bent, and the bending groove structure formed can also play a role in stabilizing the connection. In conjunction with Figure 10, the second surface 133 and the sixth surface 213 can be connected by a first connector 31. After the extension is bent, the first connector 311 can be respectively connected to the top of the third tab 13 and the fifth tab 21. In conjunction with Figure 11, the fourth surface 143 and the eighth surface 223 are connected together by a second connector 32. It can be understood that in the embodiment of the present application, the connection method between different tabs and connectors can be different to form a variety of connection methods to meet various needs. In addition, in the embodiment of the present application, the connection method between the connector and the tab is not limited. The connector and the tab can be connected by welding to meet different needs.

[0076] 2 and 3 , in some embodiments, the first electrode tab 11 and the second electrode tab 12 have opposite electrical properties, the third electrode tab 13 and the fourth electrode tab 14 have opposite electrical properties, and the fifth electrode tab 21 and the sixth electrode tab 22 have opposite electrical properties.

[0077] In this way, by setting the electrical properties of the two battery cell tabs and electrically connecting the two battery cell tabs to each other, the first battery cell 20 and the second battery cell 30 can be connected in series to form a power supply unit that stores electrical energy.

[0078] Specifically, if the first electrode 11 is the positive electrode, the second electrode 12 is the negative electrode; if the third electrode 13 is the positive electrode, the fourth electrode 14 is the negative electrode; if the fifth electrode 21 is the positive electrode, the sixth electrode 22 is the negative electrode. The positive and negative electrodes between the two paired electrode tabs can be interchanged. For example, the first electrode 11 is set as the negative electrode and the second electrode 12 is set as the positive electrode, and the electrical properties of the battery cell electrode tabs are not restricted. In other words, it is only necessary for the third electrode 13 and the corresponding fifth electrode 21 to maintain the same polarity, the fourth electrode 14 and the corresponding sixth electrode 22 to maintain the same polarity, and the third electrode 13 and the fourth electrode 14 to maintain opposite polarity.

[0079] Please refer to Figure 12. The battery 200 of the embodiment of the present application includes a first cover body 201, a second cover body 203, a shell body 202 and a battery cell assembly 100 of any one of the above embodiments. The first cover body 201, the shell body 202 and the second cover body 203 are connected in sequence to define an accommodating space 204, and the battery cell assembly 100 is arranged in the accommodating space 204.

[0080] Specifically, the battery of the above embodiment includes a battery housing and a battery cell housed within the housing. The housing includes a housing body 202, a first cover 201, and a second cover 203. The housing body 202 has openings at both ends. The first cover 201 is fixedly connected to one end of the housing body 202 to seal one open end of the housing body 202. The second cover 203 is fixedly connected to the other end of the housing body 202 to seal the other open end of the housing body 202. A storage space 204 for accommodating the battery cell is formed between the housing body 202, the first cover 201, and the second cover 203. In the embodiments of the present application, the specific material of the battery housing is not limited to meet various applications. For example, it can be made of metal materials such as stainless steel, nickel alloy, chromium alloy, or aluminum alloy.

[0081] Further, referring to FIG. 2 and FIG. 5 , in some embodiments, the shell body 202 is provided with a pole assembly 205 , and the pole assembly 205 is arranged opposite to the first pole tab 11 and electrically connected thereto.

[0082] In this way, the pole assembly 205 and the first pole ear 11 are electrically connected. At the same time, the pole assembly 205 can be arranged between the first battery cell 10 and the second battery cell 20 of the shell body 202, so that the pole assembly 205 can be connected to an external electrical component, and the electrical component can be arranged on one side of the first battery cell 10 in parallel with the second battery cell 20, which improves space utilization.

[0083] In some embodiments, the shell body 202 is further provided with a liquid injection hole 207 , and the liquid injection hole 207 and the pole assembly 205 are provided on the same side of the shell body 202 .

[0084] In this way, electrolyte can be injected from the injection hole 207, and then sealed by the sealing component 206 and the injection hole 207. The sealing component 206 and the injection hole 207 are arranged on the same side of the pole component 205, which improves space utilization.

[0085] Specifically, a pole assembly 205 is provided on the shell body 202, and the pole assembly 205 is insulated and fixedly connected to the shell body 202. The first pole tab 11 of the first battery cell 10 can be electrically connected to the pole assembly 205, and the second pole tab 12 on the first battery cell 10 can be electrically connected to the battery shell. Specifically, the second pole tab 12 can be electrically connected to the shell body 202. Through the above-mentioned connection method, the electrodes of the battery cell can be led out of the battery 200. This battery cell with a power supply unit for storing electrical energy composed of two battery cells avoids die-cutting the pole pieces into pole pieces of a specific shape, can reduce material waste, and improve material utilization.

[0086] In addition, the shell body 202 is also provided with an injection hole 207 for injecting electrolyte into the interior of the battery 200. After the battery 200 is injected, the injection hole 207 can be sealed with a sealing assembly 206. The sealing assembly 206 includes a sealing plug and a sealing cover. After the injection is completed, the sealing plug is first inserted into the injection hole 207, and then the sealing cover is pressed onto the sealing plug, and the sealing cover is fixed to the shell body 202 to seal the injection hole 207. The sealing plug and the injection hole 207 can be an interference fit. When the sealing cover is pressed onto the sealing plug, the sealing plug will be squeezed. This design can improve the sealing performance of the battery 200. Specifically, the sealing cover and the shell body 202 can be fixedly connected by welding.

[0087] Further, referring to FIG5 , in some embodiments, an injection hole 207 can be provided on the shell body 202 on the side of the second tab 12. This arrangement facilitates the injection of electrolyte into the interior of the battery 200 and increases the infiltration rate of the battery cell. Alternatively, in some embodiments, the injection hole 207 can also be provided on the shell body 202 on the side of the terminal assembly 205 (not shown in the figure). This arrangement can reduce the battery space occupied by the sealing assembly 206 and the terminal assembly 205.

[0088] Please refer to FIG. 13 . In the embodiment of the present application, the electric device 300 includes the battery 200 according to any one of the above embodiments.

[0089] In the battery cell assembly 100, battery 200 and electrical equipment 300 of the embodiment of the present application, the battery cell assembly 100 includes a first battery cell 10, a second battery cell 20 and an adapter 30, the first battery cell 10 includes a first pole tab 11, a second pole tab 12, a third pole tab 13 and a fourth pole tab 14 arranged at intervals along the width direction, the second battery cell 20 includes a fifth pole tab 21 and a sixth pole tab 22 arranged at intervals along the width direction, the first battery cell 10 and the second battery cell 20 are distributed along the length direction, the adapter 30 connects the first battery cell 10 and the second battery cell 20, the adapter 30 includes a first connector 31 and a second connector 32, the first connector 31 is configured to electrically connect the third pole tab 13 and the fifth pole tab 21, the second connector 32 is configured to electrically connect the fourth pole tab 14 and the sixth pole tab 22, and the first pole tab 11 and the second pole tab 12 are configured to electrically connect external components. In this way, the battery cell assembly 100 can be formed into a power supply unit for storing electrical energy by combining the first battery cell 10 and the second battery cell 20. The first battery cell 10 and the second battery cell 20 are connected together via the tabs and the adapter 30 to form a special-shaped battery, thereby maximizing space utilization. Furthermore, dividing the battery cell assembly 100 into two cells can reduce manufacturing difficulty, improve material utilization, and reduce manufacturing costs.

[0090] In the embodiment of the present application, there is no limitation on the specific type of the electric device 300. It only needs to install the battery 200 of the embodiment of the present application. For example, it can be an integrated or detachable battery-type electric device 300 such as a mobile phone, tablet, walkie-talkie, camera, etc. to meet various needs. In one example, the electric device 300 can be a smart phone. In this case, the battery 200 can be installed in the body of the smartphone. The special-shaped structure can save space for the smartphone and improve space utilization. At this time, the battery 200 can be electrically connected to other external components such as the circuit board of the smartphone through the pole assembly 205 to provide them with electrical energy.

[0091] In the description of the embodiments of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly specifying the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the described features. In the description of the embodiments of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0092] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with the embodiment or example is 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. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0093] 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 assembly, comprising: A first battery cell, comprising a first pole tab, a second pole tab, a third pole tab and a fourth pole tab; The second battery cell includes a fifth pole tab and a sixth pole tab, the first battery cell and the second battery cell are distributed along the length direction, the third pole tab is electrically connected to the fifth pole tab, the fourth pole tab is electrically connected to the sixth pole tab, and the first pole tab and the second pole tab are configured to be electrically connected to an external element.

2. The battery cell assembly according to claim 1, wherein: The first pole tab, the second pole tab, the third pole tab and the fourth pole tab are arranged at intervals along the width direction, and the fifth pole tab and the sixth pole tab are arranged at intervals along the width direction.

3. The battery cell assembly according to claim 2, wherein: The battery cell assembly includes a transition piece, which connects the first battery cell and the second battery cell. The transition piece includes a first connector and a second connector. The first connector is configured to electrically connect the third pole tab and the fifth pole tab, and the second connector is configured to electrically connect the fourth pole tab and the sixth pole tab.

4. The battery cell assembly according to claim 3, wherein: The first battery cell and the second battery cell are both rectangular.

5. The battery cell assembly according to claim 4, wherein: The first pole tab, the second pole tab, the third pole tab and the fourth pole tab are arranged on a side of the first battery cell close to the second battery cell, and the fifth pole tab and the sixth pole tab are arranged on a side of the second battery cell close to the first battery cell.

6. The battery cell assembly according to claim 5, wherein: When the first battery cell and the second battery cell are fixedly connected, the third pole tab and the fifth pole tab are arranged alternately, and the fourth pole tab and the sixth pole tab are arranged alternately.

7. The battery cell assembly according to claim 6, wherein: The first connecting member includes a first connecting portion, a second connecting portion, and a first transition portion respectively connecting the first connecting portion and the second connecting portion. The first connecting portion is used to electrically connect the third electrode tab, and the second connecting portion is used to electrically connect the fifth electrode tab.

8. The battery cell assembly according to claim 7, wherein: The second connecting member includes a third connecting portion, a fourth connecting portion and a second transition portion respectively connecting the third connecting portion and the fourth connecting portion, the third connecting portion is used to electrically connect the fourth pole tab, and the fourth connecting portion is used to electrically connect the sixth pole tab.

9. The battery cell assembly according to claim 8, wherein: The third pole tab is provided with a first extension portion, the first extension portion is formed with a first surface and a second surface opposite to each other, the first extension portion is bent so that the first surface is close to the first battery cell, the fourth pole tab is provided with a second extension portion, the second extension portion is formed with a third surface and a fourth surface opposite to each other, the second extension portion is bent so that the third surface is close to the first battery cell, the fifth pole tab is provided with a third extension portion, the third extension portion is formed with a fifth surface and a sixth surface opposite to each other, the third extension portion is bent so that the fifth surface is close to the second battery cell, the sixth pole tab is provided with a fourth extension portion, the fourth extension portion is formed with a seventh surface and an eighth surface opposite to each other, the fourth extension portion is bent so that the seventh surface is close to the second battery cell, in the thickness direction, the first extension portion and the second extension portion are close to the upper surface of the first battery cell, and the third extension portion and the fourth extension portion are close to the lower surface of the second battery cell; The first connecting portion is fixedly connected to the first surface or the second surface; and / or The second connecting portion is fixedly connected to the fifth surface or the sixth surface; and / or The third connecting portion is fixedly connected to the third surface or the fourth surface; and / or The fourth connection portion is fixedly connected to the seventh surface or the eighth surface.

10. The battery cell assembly according to claim 1, wherein: The first pole tab and the second pole tab have opposite electrical properties, the third pole tab and the fourth pole tab have opposite electrical properties, and the fifth pole tab and the sixth pole tab have opposite electrical properties.

11. A battery comprising: a first cover; a second cover; A shell body, wherein the first cover body, the shell body and the second cover body are sequentially connected to define an accommodating space; and The battery cell assembly according to any one of claims 1 to 10, wherein the battery cell assembly is arranged in the accommodating space.

12. The battery according to claim 11, wherein The shell body is provided with a pole assembly, and the pole assembly is arranged opposite to the first pole lug and is electrically connected together.

13. The battery according to claim 12, wherein: The shell body is further provided with a liquid injection hole, and the liquid injection hole and the pole assembly are arranged on the same side of the shell body.

14. An electrical device comprising the battery according to any one of claims 11 to 13.

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