Battery and electric device

Abstract

The present application relates to the related technical field of batteries, and discloses a battery and an electric device, aiming to improve the space utilization of the battery. The battery provided by the present application has a first direction Z and a second direction X which are perpendicular to each other. The battery comprises a cover plate, the cover plate is provided with a first plate surface, a second plate surface, and accommodating holes running through the first plate surface and the second plate surface, the first plate surface and the second plate surface are respectively located at two ends of the cover plate in the first direction Z, and the second plate surface faces battery cells; tabs are arranged on the side of the battery cells facing the second plate surface; each pole comprises a pole body and a connecting member, the pole body is arranged in a corresponding accommodating hole and is provided with a pole hole running through the pole body in the first direction Z, the connecting member extends in the second direction X and is mounted in the pole hole and defines gaps with part of the hole wall of the pole hole, and the tabs extend into the gaps and are electrically connected to the connecting member.

Description

Battery and electric device

[0001] The present application claims priority to the Chinese patent application No. 202420742811.8 filed on April 11, 2024, and entitled "Battery and electric device", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] Embodiments of the present application relate to, but are not limited to, a battery and an electric device. BACKGROUND

[0003] In the manufacturing process of a multi-tab battery, the tabs are mostly in a bent state, and space needs to be reserved for the bent tabs to prevent the tabs from being squeezed, resulting in a sacrifice of part of the space utilization in the height direction of the battery. SUMMARY

[0004] The following is a summary of the subject matter of the detailed description herein. This summary is not intended to limit the scope of the claims.

[0005] Embodiments of the present application provide a battery to improve the space utilization of the battery; another object of embodiments of the present application is to provide an electric device.

[0006] In a first aspect, a battery according to embodiments of the present application has a first direction Z and a second direction X perpendicular to each other, and the battery comprises:

[0007] A cover plate has a first plate surface, a second plate surface, and a receiving hole penetrating through the first plate surface and the second plate surface, and the first plate surface and the second plate surface are respectively located at two ends of the cover plate in the first direction Z;

[0008] An electric core is arranged towards the second plate surface;

[0009] A tab is arranged on a side of the electric core facing the second plate surface;

[0010] A pole includes a pole body and a connecting piece, the pole body is arranged in the receiving hole and is provided with a pole hole penetrating in the first direction Z, the connecting piece extends in the second direction X and is mounted in the pole hole and forms a gap with part of the hole wall of the pole hole, and the tab is arranged in the gap and is electrically connected with the connecting piece.

[0011] In this way, when the electric core is placed in the shell, the cover plate is assembled with the shell, the tab on the electric core is arranged in the gap formed by the connecting piece and part of the hole wall of the pole hole, and space is not reserved for the bent tab in the first direction Z, thereby improving the space utilization of the battery in the first direction Z and increasing the energy density of the battery

[0012] In some embodiments of the application, the tab includes an extension section and a fitting section, the extension section is connected to the fitting section at two ends respectively.

[0013] In some embodiments of the application, the connecting member includes a connecting surface, the connecting surface is arranged opposite to the battery cell, the extension section is arranged in the pole post hole, and the fitting section is connected to the connecting surface.

[0014] In some embodiments of the application, the battery further has a third direction Y, the first direction Z, the second direction X and the third direction Y are perpendicular to each other.

[0015] The pole post body includes two first side portions extending along the second direction X and two second side portions extending along the third direction Y, the two first side portions and the two second side portions enclose the pole post hole, the connecting member is connected to the second side portion and is arranged spaced apart from the first side portion to form the gap, the first side portion has a slope surface facing the battery cell, and the slope surface is inclined away from the battery cell in a direction from the first side portion to the connecting member.

[0016] In some embodiments of the application, the battery further includes:

[0017] A lower plastic is connected to the cover plate and is located between the battery cell and the cover plate, the lower plastic is provided with a mounting hole, a portion of the pole post body close to the battery cell is mounted in the mounting hole, the mounting hole has a first hole section, the first hole section is arranged close to the battery cell, and the size of the first hole section in the third direction Y decreases in a direction from the second plate surface to the first plate surface.

[0018] In some embodiments of the application, the lower plastic has a first wall surface, the first wall surface faces the tab, and a large end of the first hole section is located on the first wall surface.

[0019] In some embodiments of the application, the lower plastic has a first wall surface, the first wall surface is a flat surface, and the first wall surface is at least partially arranged against the battery cell.

[0020] In some embodiments of the application, the battery further has a third direction Y, the first direction Z, the second direction X and the third direction Y are perpendicular to each other.

[0021] The battery has a plurality of the battery cells, and the plurality of the battery cells are arranged in sequence along the third direction Y, each of the battery cells is provided with the tab on one side facing the second plate surface, the connecting surface has one and is a plane and faces away from the battery cells, each of the tabs comprises the extending section and the fitting section, and the plurality of the fitting sections are arranged in layers and connected to the connecting surface.

[0022] In some embodiments of the present application, the battery further has a third direction Y, and the first direction Z, the second direction X and the third direction Y are perpendicular to each other in pairs.

[0023] The battery has a plurality of the battery cells, and the plurality of the battery cells are arranged in sequence along the third direction Y, each of the battery cells is provided with the tab on one side facing the second plate surface, the connecting surface has one and is an arc surface and faces away from the battery cells, each of the tabs comprises the extending section and the fitting section, and the plurality of the fitting sections are arranged in layers and connected to the connecting surface.

[0024] In some embodiments of the present application, the battery further has a third direction Y, and the first direction Z, the second direction X and the third direction Y are perpendicular to each other in pairs.

[0025] The battery has a plurality of the battery cells, and the plurality of the battery cells are arranged in sequence along the third direction Y, each of the battery cells is provided with the tab on one side facing the second plate surface, the connecting surface has two, each of the tabs comprises the extending section and the fitting section, part of the plurality of the fitting sections is connected to one of the two connecting surfaces, and the rest of the fitting sections is connected to the other of the two connecting surfaces, the connecting surface is a plane, and the two planes intersect to form an included angle, and the opening of the included angle faces the battery cells.

[0026] In some embodiments of the present application, the pole hole is provided with a stepped surface away from the end of the battery cell, the stepped surface faces away from the battery cell, and the battery further comprises:

[0027] The connecting piece is arranged on the stepped surface and seals the pole hole, two surfaces of the fitting section in the first direction Z are a welding surface and an outer side surface respectively, and the welding surface is welded to the connecting surface; in the first direction Z, the stepped surface is away from the connecting piece relative to the outer side surface.

[0028] In some embodiments of the present application, the battery further has a third direction Y, and the first direction Z, the second direction X and the third direction Y are perpendicular to each other in pairs.

[0029] The connecting piece extends along the second direction X and has a columnar structure, and two ends of the connecting piece are connected to two hole walls of the pole column hole along the third direction Y and oppositely arranged.

[0030] In some embodiments of the present application, the battery further has a third direction Y, and the first direction Z, the second direction X and the third direction Y are perpendicular to each other two by two.

[0031] The size of the gap in the second direction X is greater than the size of the tab in the second direction X.

[0032] In some embodiments of the present application, the size of the gap in the third direction Y is greater than the size of the tab in the third direction Y.

[0033] In some embodiments of the present application, an obtuse angle is formed between the extending section and the abutting section.

[0034] In some embodiments of the present application, the included angle is an obtuse angle.

[0035] In some embodiments of the present application, the size of the gap in the second direction is 4mm to 6mm greater than the size of the tab in the second direction.

[0036] In some embodiments of the present application, the size of the gap in the third direction is 4mm to 6mm greater than the size of the tab in the third direction.

[0037] In some embodiments of the present application, the battery further comprises:

[0038] A sealing member is arranged between the inner wall of the accommodating hole and the outer periphery of the pole column body to seal the accommodating hole and the pole column body.

[0039] In a second aspect, the use electric device provided by the embodiments of the present application comprises the battery as in any of the above technical solutions.

[0040] Since the use electric device provided by the present application comprises the battery as in any of the above technical solutions, both can solve the same problem and achieve the same effect. BRIEF DESCRIPTION OF DRAWINGS

[0041] The drawings needed in the following embodiment description will be briefly introduced as follows, and the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained according to these drawings without creative labor for those skilled in the art.

[0042] Fig. 1 is a structural schematic view of a battery in the embodiments of the present application;

[0043] Fig. 2 is an exploded view of another battery in the embodiments of the present application;

[0044] Fig. 3 is a front view of a battery in the embodiments of the present application;

[0045] Fig. 4 is a schematic view of a cross-sectional structure of the battery shown in Fig. 3 at line A-A;

[0046] Fig. 5 is an enlarged view of part B in Fig. 4;

[0047] Fig. 6 is a perspective view of a pole in the embodiments of the present application;

[0048] Fig. 7 is a schematic view of a cross-sectional structure of the pole shown in Fig. 6 at line C-C;

[0049] Fig. 8 is a perspective view of a pole in the embodiments of the present application;

[0050] Fig. 9 is a front view of a battery in the embodiments of the present application;

[0051] Fig. 10 is a schematic view of a cross-sectional structure of the battery shown in Fig. 9 at line D-D;

[0052] Fig. 11 is an enlarged view of part E in Fig. 10;

[0053] Fig. 12 is a perspective view of a pole in the embodiments of the present application;

[0054] Fig. 13 is a perspective view of a pole in the embodiments of the present application.

[0055] The main reference signs in the drawings of the present application are explained as follows:

[0056] 1 - cover plate; 11 - first plate surface; 12 - second plate surface; 13 - accommodating hole; 14 - explosion-proof valve; 15 - liquid injection hole;

[0057] 2 - battery cell;

[0058] 3 - tab; 31 - extension section; 32 - fitting section;

[0059] 4 - pole; 41 - pole body; 411 - pole hole; 4111 - step surface; 412 - first side portion; 4121 - inclined surface; 413 - second side portion; 42 - connecting piece; 421 - connecting surface; 43 - gap;

[0060] 5 - lower plastic; 51 - mounting hole; 511 - first hole section; 52 - first wall surface; 53 - second wall surface;

[0061] 6 - connecting piece;

[0062] 7 - housing; 71 - opening; 72 - accommodating space;

[0063] Z - first direction; X - second direction; Y - third direction.

[0064] Other aspects can become apparent from a review of the drawings and detailed description. Embodiments of the application

[0065] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0066] In the drawings, for the purpose of clarity, the shapes and dimensions can be exaggerated, and the same reference numerals will be used throughout the drawings to indicate the same or similar components.

[0067] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or positional relationship shown in the 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 particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In particular, "height" corresponds to the size from top to bottom, "width" corresponds to the size from left to right, and "depth" corresponds to the size from front to back, which are relative concepts, so it is possible that they will change accordingly according to their different positions, different use states. Therefore, these or other orientations should not be used to interpret as limiting language.

[0068] The terms "first", "second", "third", etc. are used only for descriptive purposes and should not be construed as indicating or implying relative importance or implying the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0069] In the description of the present application, it should be noted that unless otherwise specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, it can be directly connected, or indirectly connected through intermediate medium, it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0070] In the embodiments of the present application, the terms "plurality" and "a plurality of" refer to two or more. In the embodiments of the present application, unless otherwise specified, the description of "parallel" means approximately parallel within a certain error range, which can be a range of less than or equal to 5° deviation from absolute parallel. The description of "perpendicular" means approximately perpendicular within a certain error range, which can be a range of less than or equal to 5° deviation from absolute perpendicular.

[0071] The present application provides a battery and an electric device, which are described in detail below. It should be noted that the order of description of the following embodiments is not intended to limit the preferred order of the embodiments of the present application. Moreover, in the following embodiments, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0072] As shown in FIG. 1, in the manufacturing process of the multi-tab battery, when the tabs 02 on the winding core 01 in the battery are welded to the cover plate 03 in the top cover, the cover plate 03 and the tabs 02 on the winding core 01 on both sides of the cover plate 03 are placed in the welding fixture for welding. Then, the winding cores 01 on both sides of the cover plate 03 are combined, and the combined winding cores 01 are fixed together with adhesive tape, wrapped with a polyester film, and inserted into the shell for laser welding of the top cover. In the process of combining, the first tabs 021 close to the outer side of the winding core 01 are easily torn off, and after the combination, the second tabs 022 inside the winding core 01 have redundancy, and the redundant part is easily inserted into the winding core 01, causing short circuit.

[0073] At the same time, in most cases, the tabs in this manufacturing process are in a bent state. In order to reserve space for the bent tabs and to prevent the tabs from being squeezed, the top cover lower plastic 04 is provided with a boss 041 extending in the height direction on each of the opposite sides in the width direction, and the two bosses 041 respectively abut against the shoulder portions on the opposite sides in the width direction of the winding core 01, so as to leave a reserved space for the bent tabs 02, resulting in a sacrifice of a part of the space utilization in the height direction.

[0074] FIG. 2 only schematically shows some components included in the battery, and the actual shape, actual size, actual position and actual structure of these components are not limited by FIG. 2. In some other examples, the battery can also include 3, 4 or more number of winding cores 2.

[0075] Referring to FIG. 2, the battery provided by the present application is cuboid, and based on this, an XYZ coordinate system is established, and the battery is defined to have a first direction Z, a second direction X and a third direction Y. The first direction Z, the second direction X and the third direction Y are perpendicular to each other. The battery is used in an electric device such as a vehicle, a ship or an aircraft, to provide electric energy for the above-mentioned devices. The battery disclosed in the embodiments of the present application includes but is not limited to those used in an electric device such as a vehicle, a ship or an aircraft. The electric device includes but is not limited to a mobile phone, a tablet, a notebook computer, an electric vehicle, an electric automobile, a ship, a spacecraft, etc.

[0076] The following embodiments are further descriptions based on the above-mentioned 2 cells 2 arranged in the third direction Y, which cannot be considered as a special limitation to the present application.

[0077] Referring to FIG. 2, the above-mentioned battery includes a cover plate 1, a cell 2, a tab 3 and a pole 4.

[0078] The cover plate 1 is rectangular and has a first plate surface 11, a second plate surface 12 and a receiving hole 13 penetrating through the first plate surface 11 and the second plate surface 12, the receiving hole 13 extends through the cover plate 1 along the first direction Z to install the pole body 41 of the pole 4, and the first plate surface 11 and the second plate surface 12 are respectively located at both ends of the cover plate 1 in the first direction Z, that is, the first plate surface 11 constitutes the upper surface of the cover plate 1, and the second plate surface 12 constitutes the lower surface of the cover plate 1.

[0079] The pole 4 includes a pole body 41 and a connecting piece 42, the pole body 41 is arranged in the receiving hole 13 of the cover plate 1, and is provided with a square pole hole 411 penetrating along the first direction Z, the pole hole 411 is coaxially arranged with the above-mentioned receiving hole 13. The connecting piece 42 extends along the second direction X and is installed in the pole hole 411, and forms a gap 43 with part of the hole wall of the pole hole 411, the tab 3 extends into and is arranged in the gap 43 and is electrically connected with the connecting piece 42, and the second direction X is perpendicular to the first direction Z, wherein the first direction Z can be the height direction of the battery, and the second direction X can be the length direction of the battery.

[0080] In the specific installation, the cell 2 is placed in the shell 7, and then the cover plate 1 is assembled with the shell 7, so that the tab 3 on the cell 2 penetrates into the gap 43 formed by the connecting piece 42 and part of the hole wall of the pole hole 411, which reduces the reserved space provided to the bent tab 3 in the first direction Z, thereby improving the space utilization of the battery in the first direction Z and increasing the energy density of the battery.

[0081] Meanwhile, when the battery cell 2 is loaded into the shell 7, the cell combining step of the battery cell 2 is omitted, and the risk of tearing off the tab 3 and the redundancy and insertion of the tab 3 in the cell combining process is avoided, which is beneficial to improve the safety and service life of the battery cell 2. In addition, the connecting piece 42 is arranged in the pole body 41 of the pole 4, the tab 3 is arranged in the gap 43 formed by the connecting piece 42 and part of the hole wall of the pole hole 411, and the tab 3 is electrically connected with the connecting piece 42, which is convenient for realizing the connection and fixation of the tab 3.

[0082] The connecting piece 42 is arranged in the pole hole 411, one end of the connecting piece 42 is connected with the hole wall of the pole hole 411, and the other end is a free end, or the two ends of the connecting piece 42 are respectively connected with the hole walls on the opposite sides of the pole hole 411, and the connecting piece 42 is detachably connected with the pole body 41, and then is fixed and installed together by clamping connection, threaded connection, welding connection and the like. Alternatively, the connecting piece 42 can also be integrally formed with the pole body 41. The present application does not make specific limitation on this.

[0083] It can be understood that the battery cell 2 has a plurality of, that is, the battery cell 2 has at least two, and the plurality of battery cells 2 are arranged in sequence along the third direction Y. The second plate surface 12 is arranged towards or faces the battery cell 2.

[0084] In the following, the same structure of the pole 4 in each embodiment is described in detail.

[0085] Fig. 3 is a front view of the battery in some embodiments of the present application, Fig. 4 is a schematic view of the cross-sectional structure of the battery shown in Fig. 3 at A-A line, and Fig. 5 is an enlarged view of part B in Fig. 4. Please refer to Figs. 3 to 5, the tab 3 includes an extension section 31 and a fitting section 32, the two ends of the extension section 31 are respectively connected with the battery cell 2 and the fitting section 32, and the fitting section 32 is arranged by bending relative to the extension section 31. The connecting piece 42 includes a connecting surface 421, the connecting surface 421 is arranged away from the battery cell 2, the extension section 31 is arranged in the pole hole 411, the fitting section 32 is connected to the connecting surface 421, the fitting section 32 and the connecting surface 421 are connected in a surface-to-surface fitting manner, which can ensure the connection reliability between the fitting section 32 and the connecting piece 42.

[0086] Fig. 6 is a perspective view of the pole column in some embodiments of the present application, and Fig. 7 is a sectional view of the pole column shown in Fig. 6 at the line C-C. In combination with Figs. 5, 6 and 7, the pole column body 41 of the pole column 4 includes two first side portions 412 extending along the second direction X and two second side portions 413 extending along the third direction Y, the two first side portions 412 and the two second side portions 413 together define a pole column hole 411; the connecting member 42 is connected to the second side portions 413 and is spaced apart from the first side portions 412 to form a gap 43, the first side portions 412 have a slope 4121 facing the battery cell 2, and in the direction from the first side portions 412 to the connecting member 42, the slope 4121 is inclined away from the battery cell 2, thereby providing a structure capable of avoiding the contact between the extended section 31 of the tab 3 and the bottom of the first side portions 412 of the pole column body 41, preventing the tab 3 from being pressed by the bottom of the pole column body 41, and reducing the risk of damage and tearing of the tab 3 when the battery cell 2 is subjected to impact or vibration.

[0087] Specifically, as shown in Fig. 6, the pole column body 41 has a hollow square structure, and the hollow part inside the pole column body 41 constitutes the pole column hole 411. The pole column body 41 includes a first side wall, a second side wall, a third side wall and a fourth side wall connected end to end in sequence. The first side portions 412 include the first side wall and the third side wall which are opposite to each other and both extend along the second direction X. The second side portions 413 include the second side wall and the fourth side wall which are opposite to each other and both extend along the third direction Y. The two ends of the connecting member 42 are connected to the opposite sides of the second side wall and the fourth side wall, respectively, to divide the pole column hole 411 into two gaps 43 along the third direction Y.

[0088] In order to achieve insulation between the cover plate 1 and the battery cell 2 and improve the safety of the battery, the battery further includes a lower plastic 5 connected to the cover plate 1 and located between the battery cell 2 and the cover plate 1. The lower plastic 5 has a mounting hole 51, and the part of the pole column body 41 close to the battery cell 2 is mounted in the mounting hole 51. The mounting hole 51 has a first hole section 511 close to the battery cell 2, and the size of the first hole section 511 in the third direction Y decreases from the second plate surface 12 to the first plate surface 11. The size of the inner wall of the first hole section 511 in the third direction Y decreases to form an inclined wall surface, thereby preventing the tab 3 from being pressed by the lower plastic 5 and reducing the risk of damage and tearing of the tab 3 when the battery cell 2 is subjected to impact or vibration.

[0089] For example, the inner wall of the first hole section 511 in the third direction Y decreases in size to form an inclined wall surface, the inclined direction of the inclined surface 4121 is the same as that of the inclined wall surface, and the inclined angles of the inclined surface 4121 and the inclined wall surface are the same. The extension section 31 of the tab 3 is a bent section that extends into the gap 43. The bent section, the inclined surface 4121, and the inclined wall surface are spaced apart in the first direction Z. That is, the bent section does not contact the inclined surface 4121 and the inclined wall surface, thereby better preventing the tab body 41 and the lower plastic 5 from extruding the tab 3.

[0090] The lower plastic 5 has a first wall surface 52 that faces the tab 3. The large opening end of the first hole section 511 is located on the first wall surface 52. The large opening end of the first hole section 511 on the first wall surface 52 has the largest size in the third direction Y, that is, the thinnest wall thickness, thereby better preventing the tab 3 from being extruded by the lower plastic 5.

[0091] In addition, the first wall surface 52 is a flat surface and is at least partially attached to the battery cell 2. The first wall surface 52 is a horizontal surface parallel to the cover plate 1, that is, the boss structure in FIG. 1 is not required, thereby reducing the connection distance between the battery cell 2 and the tab 4 on the cover plate 1, reducing the internal resistance between the tab 3 and the tab 4, and improving the service life and performance of the battery cell 2.

[0092] The foregoing provides the embodiment in which the tab 3 includes the extension section 31 and the attached section 32. The two ends of the extension section 31 are connected to the battery cell 2 and the attached section 32, respectively. The attached section 32 is bent relative to the extension section 31. The connector 42 includes the connection surface 421 that is arranged to face away from the battery cell 2. The extension section 31 is arranged in the tab hole 411. The attached section 32 is attached to the connection surface 421.

[0093] Based on the embodiment, two attachment modes of the attached section 32 attached to the connection surface 421 are described in detail.

[0094] Embodiment One

[0095] Referring to FIGS. 2, 6, and 7, the battery cell 2 has a plurality of battery cells 2 arranged in the third direction Y. Each battery cell 2 has a tab 3 arranged on the side facing the second plate surface 12. The connection surface 421 has one flat or arc-shaped surface that faces away from the battery cell 2. Each tab 3 includes the extension section 31 and the attached section 32. The plurality of attached sections 32 are stacked. The attached section 32 closest to the battery cell 2 is connected to the connection surface 421, thereby ensuring a larger connection area between the attached section 32 and the connection surface 421 and more stable and reliable connection.

[0096] In the above embodiments, the connecting surface 421 has one, and the fitting sections 32 of the tabs 3 on both sides of the connecting member 42 in the third direction Y are connected to the same connecting surface 421.

[0097] Embodiment II

[0098] Fig. 9 is a front view of a battery according to another embodiment of the present application, Fig. 10 is a schematic view of a cross section of the battery shown in Fig. 9 along line D-D, Fig. 11 is an enlarged view of part E in Fig. 10, and Fig. 12 is a perspective view of a pole according to another embodiment of the present application. Referring to Figs. 9 to 12, in another embodiment of the present application, the battery cell 2 has a plurality, and the plurality of battery cells 2 are arranged in sequence in the third direction Y. Each battery cell 2 has a tab 3 on one side facing the second plate surface 12. The connecting surface 421 has two, and each tab 3 includes an extending section 31 and a fitting section 32. Some of the fitting sections 32 are connected to one of the two connecting surfaces 421, and the rest of the fitting sections 32 are connected to the other of the two connecting surfaces 421. The connecting surface 421 is a plane, and the two planes intersect to form an included angle, and the opening of the included angle faces the battery cell 2. It can also be understood that the extension planes of the two planes and the extension plane of the wall surface of the battery cell 2 provided with the tab 3 form a triangular structure. The connecting member 42 of this structure is simple in structure and easy to form, which is conducive to reducing the number of connected tabs 3 on each connecting surface 421, thereby reducing the size of the battery in the first direction Z.

[0099] Referring to Fig. 12, Fig. 13 is a perspective view of a pole according to another embodiment of the present application. The connecting surface 421 has two, and the two connecting surfaces 421 are connected. The edge formed by the connection of the two connecting surfaces 421 is located at the middle position of the pole body 41 in the third direction Y. Referring to Fig. 13, Fig. 13 is a perspective view of a pole according to another embodiment of the present application. The connecting surface 421 has two, and the two connecting surfaces 421 are not connected. The extension planes of the two connecting surfaces 421 are connected, and the edge formed by the connection of the two extension planes is located at the middle position of the pole body 41 in the third direction Y.

[0100] It can also be understood that the connecting surface 421 has two, and the fitting sections 32 of the tabs 3 on both sides of the connecting member 42 in the third direction Y are connected to the connecting surfaces 421 close to the tabs 3, respectively.

[0101] With reference to FIG. 2, FIG. 5 and FIG. 6, the battery further comprises a connecting piece 6. The pole hole 411 is provided with a stepped surface 4111 away from the end of the battery cell 2, the stepped surface 4111 is arranged away from the battery cell 2, the connecting piece 6 is arranged on the stepped surface 4111 and seals the pole hole 411, and the two surfaces of the abutting section 32 in the first direction Z are a welding surface and an outer side surface respectively, and the welding surface is welded to the connecting surface 421. In the first direction Z, the stepped surface 4111 is away from the connecting piece 42 relative to the outer side surface. In this way, on the one hand, it can avoid interference between the connecting piece 6 and the tab 3 during installation, causing damage to the tab 3. On the other hand, it can also protect the tab 3 from damage caused by external objects colliding with the tab 3. In addition, it can also avoid the connecting piece 6 being lifted by the tab 3 and not being able to abut the stepped surface 4111, thereby causing the risk of virtual welding and explosion points during laser welding of the connecting piece 6, affecting the welding effect of the connecting piece 6 and the stepped surface 4111, and further affecting the sealing performance of the battery cell 2. It can also be understood that the stepped surface 4111 is higher than the outer side surface of the tab 3. The connecting piece 6 is arranged on the stepped surface 4111, and the top surface of the connecting piece 6 is flush with the top of the pole hole 411.

[0102] For example, the connecting piece 6 includes a positive connecting piece and a negative connecting piece, the tab 3 includes a positive tab and a negative tab, and the pole 4 includes a positive pole and a negative pole. The positive connecting piece is made of aluminum, and its size (thickness) in the first direction Z is 0.3mm to 2mm. The negative connecting piece is made of copper, and its size (thickness) in the first direction Z is 0.2mm to 2mm.

[0103] In some embodiments of the present application, with reference to FIG. 6 and FIG. 7, the connecting piece 42 extends along the second direction X and has a columnar structure, and the two ends of the connecting piece 42 are connected to the two hole walls of the pole hole 411 along the third direction Y and arranged opposite to each other, so as to divide the pole hole 411 along the third direction Y into a plurality of gaps 43. The connecting piece 42 shown in FIG. 6 has one, which divides the pole hole 411 along the third direction Y into two gaps 43. In other embodiments not shown in the drawings, the connecting piece 42 has N, which divides the pole hole 411 along the third direction Y into (N+1) gaps. Correspondingly, the number of battery cells 2 can be (N+1), and the tabs 3 on each battery cell 2 extend into and pass through the corresponding gap.

[0104] For example, with reference to FIG. 5 and FIG. 6, in the embodiment in which the battery cell 2 has two and each battery cell 2 is provided with a tab 3 on the side facing the cover plate 1. The tab 3 connected on the left battery cell 2 of the two battery cells 2 passes through the gap 43 on the left side of the connecting piece 42, and the tab 3 connected on the right battery cell 2 passes through the gap 43 on the right side of the connecting piece 42. The present application is exemplarily illustrated with two battery cells 2, which cannot be considered as a special limitation of the present application.

[0105] Alternatively, the electric cell 2 has 3, one of the two gaps 43 can be selected to extend into two groups of the tab 3, and the other gap 43 extends into one group of the tab 3, as long as all the tabs 3 are connected to the connecting surface 421 after extending out of the gap 43, which is not shown in the figure.

[0106] Alternatively, in some other embodiments, the connecting piece 42 is connected to the middle position of the pole body 41 in the third direction Y, referring to FIG. 6, the connecting piece 42 divides the pole hole 411 into two gaps 43 in the third direction Y, and the sizes of the two gaps 43 in the third direction Y are the same, which facilitates the tab 3 to extend out of each gap 43 and be connected to the connecting piece 42.

[0107] In some embodiments of the present application, the size of the gap 43 in the second direction X is slightly larger than the size of the tab 3 in the second direction X, and the size of the gap 43 in the third direction Y is slightly larger than the size of the tab 3 in the third direction Y, thereby facilitating the tab 3 to be connected to the connecting piece 42 after passing through the corresponding gap 43. For example, the size of the gap 43 in the second direction X is 4-6 mm larger than the size of the tab 3 in the second direction X, and it should be noted that the tab 3 here refers to the size of the multiple tabs in the second direction after being folded. The size of the gap 43 in the third direction Y is 4-6 mm larger than the size of the tab 3 in the third direction Y, and it should be noted that the tab 3 here refers to the size of the multiple tabs in the third direction after being folded. The size of the above-mentioned pole 4 is ensured not to be too large.

[0108] In some embodiments of the present application, a sealing member is arranged between the inner wall of the accommodating hole 13 of the cover plate 1 and the outer periphery of the pole body 41 to achieve sealed connection between the cover plate 1 and the pole body 41. For example, the sealing member can be a sealing rubber ring arranged on the outer periphery of the pole body 41, or a sealing glue filled between the inner wall of the accommodating hole 13 of the cover plate 1 and the outer periphery of the pole body 41, and the specific structure of the sealing member is not limited in the present application.

[0109] In some embodiments of the present application, please continue to refer to FIG. 2, the above-mentioned battery further comprises a shell 7, one side wall of the shell 7 is provided with an opening 71, the shape and size of the cover plate 1 are matched with the shape and size of the opening 71 on the shell 7, so as to close the opening 71 and protect the electric cell 2 installed in the shell 7. The cover plate 1 can be made of a material with certain hardness to avoid deformation of the cover plate 1 when subjected to external force impact, and the external force is transmitted to the electric cell 2 through the cover plate 1, causing damage to the electric cell 2. For example, the above-mentioned shell 7 is made of aluminum material to ensure that the battery has good heat dissipation effect. The shell 7 can also be made of copper, iron, aluminum alloy and other materials.

[0110] Meanwhile, one side wall of the shell 7 is provided with an opening 71, and a receiving space 72 is formed in the opening 71, the receiving space 72 is used for accommodating the battery cell 2, the cover plate 1 is arranged at the opening 71, and the second plate surface 12 faces the receiving space 72. That is, the second plate surface 12 can also be understood as the inner side plate surface of the cover plate 1 facing the receiving space of the shell 7. In this example, the tab 3 is arranged on the side of the battery cell 2 facing the second plate surface 12, which can be understood as the tab 3 being arranged on the top side of the battery cell 2, and the opening 71 of the shell 7 is arranged opposite to the bottom wall thereof.

[0111] In other words, in the embodiment shown in FIG. 2, one side wall of the shell 7 is provided with an opening 71, and a corresponding battery can be closed by one cover plate 1. Of course, in other embodiments not shown in the drawings, the shell 7 can also have two openings arranged opposite to each other, that is, two side walls of the shell 7 arranged opposite to each other along the first direction Z (that is, the top wall and the bottom wall of the shell 7 shown in FIG. 2) are both provided with openings 71, and accordingly, two cover plates 1 can be used to close the two openings respectively. Based on this, the second plate surface 12 of the two cover plates 1 facing the receiving space 72 of the shell 7 is defined.

[0112] For the embodiment in which one side wall (the top wall) of the shell 7 is provided with an opening 71, the tab 3 is connected to the wall surface (the top end wall surface) of the battery cell 2 close to the opening 71, and the opening is rectangular. For the embodiment in which two side walls of the shell arranged opposite to each other along the first direction Z are both provided with openings, the tabs are connected to the two wall surfaces (the top end wall surface and the bottom end wall surface) close to the two openings respectively. The number, shape and size of the openings on the shell 7 cannot be considered as special limitations to the present application. In the specific manufacturing process, the specific shape and size of the shell 7 can be determined according to the specific shape and size of the battery cell 2.

[0113] In some embodiments of the present application, the present application also provides a power-using device, which comprises the battery as claimed in any one of the technical solutions above. Since the power-using device provided by the present application comprises the battery as claimed in any one of the technical solutions above, both of them can solve the same problem and achieve the same effect.

[0114] In the description of the present application, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0115] The above merely describes specific embodiments of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical scope disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims. In addition, the principles and embodiments of the present application are described by applying specific examples in the specification, and the above description of the embodiments is only used to help understand the method and core idea of the present application, and the content of the specification should not be understood as limiting the present application.

Claims

1. A battery having a first direction and a second direction perpendicular to each other, the battery comprising: a cover plate having a first plate surface, a second plate surface, and a receiving hole passing through the first plate surface and the second plate surface, wherein the first plate surface and the second plate surface are respectively located at two ends of the cover plate in the first direction; A battery cell, wherein the second plate surface is arranged toward the battery cell; a tab, provided on a side of the battery cell facing the second plate surface; The pole includes a pole body and a connecting piece. The pole body is arranged in the accommodating hole and is provided with a pole hole passing through along the first direction. The connecting piece extends along the second direction and is installed in the pole hole. It forms a gap with part of the hole wall of the pole hole. The pole ear is passed through the gap and is electrically connected to the connecting piece.

2. The battery according to claim 1, wherein: The tab includes an extension section and a fitting section, and two ends of the extension section are respectively connected to the battery cell and the fitting section.

3. The battery according to claim 2, wherein: The connecting member includes a connecting surface, the connecting surface is arranged to face away from the battery core, the extending section is passed through the pole hole, and the fitting section is fitted and connected to the connecting surface.

4. The battery according to claim 2, wherein: The battery further has a third direction, and the first direction, the second direction and the third direction are perpendicular to each other; The pole body includes two first side portions extending along the second direction, and two second side portions extending along the third direction. The two first side portions and the two second side portions together form the pole hole. The connecting member is connected to the second side portion and is spaced apart from the first side portion to form the gap. The first side portion has an inclined surface facing the battery cell. In the direction from the first side portion to the connecting member, the inclined surface is inclined in a direction away from the battery cell.

5. The battery according to claim 4, further comprising: The lower plastic is connected to the cover plate and is located between the battery cell and the cover plate. A mounting hole is provided on the lower plastic. The portion of the pole body close to the battery cell is installed in the mounting hole. The mounting hole has a first hole segment. The first hole segment is arranged close to the battery cell. From the second plate surface to the first plate surface, the size of the first hole segment in the third direction decreases.

6. The battery according to claim 5, wherein: The lower plastic has a first wall, the first wall faces the tab, and the large end of the first hole segment is located on the first wall.

7. The battery according to claim 5, wherein: The lower plastic has a first wall surface, which is a flat surface, and at least a portion of the first wall surface is disposed close to the battery core.

8. The battery according to claim 3, wherein: The battery further has a third direction, and the first direction, the second direction and the third direction are perpendicular to each other; There are multiple battery cells, and the multiple battery cells are arranged in sequence along the third direction. Each battery cell is provided with a pole ear on the side facing the second plate surface. There is only one connecting surface, which is flat and faces away from the battery cell. Each pole ear includes the extension section and the fitting section. The multiple fitting sections are stacked and connected to the connecting surface.

9. The battery according to claim 3, wherein: The battery further has a third direction, and the first direction, the second direction and the third direction are perpendicular to each other; There are multiple battery cells, and the multiple battery cells are arranged in sequence along the third direction. Each battery cell is provided with a pole ear on the side facing the second plate surface. There is only one connecting surface, which is an arc-shaped surface and faces away from the battery cell. Each pole ear includes the extension section and the fitting section. Multiple fitting sections are stacked and connected to the connecting surface.

10. The battery according to claim 3, wherein: The battery further has a third direction, and the first direction, the second direction and the third direction are perpendicular to each other; There are multiple battery cells, and the multiple battery cells are arranged in sequence along the third direction. Each battery cell is provided with a pole ear on the side facing the second plate surface. There are two connecting surfaces. Each pole ear includes an extension section and a fitting section. Some of the multiple fitting sections are connected to one of the two connecting surfaces, and the remaining fitting sections are connected to the other of the two connecting surfaces. The connecting surface is a plane, and the surfaces where the two planes are located intersect to form an angle, and the opening of the angle faces the battery cell.

11. The battery according to any one of claims 3 to 10, wherein: The end of the pole hole away from the battery cell is provided with a stepped surface, the stepped surface facing away from the battery cell, and the battery further comprises: A connecting piece is provided on the step surface and seals the pole hole. The two surfaces of the fitting section in the first direction are a welding surface and an outer side surface, respectively. The welding surface is welded to the connecting surface. In the first direction, the step surface is away from the connecting piece relative to the outer side surface.

12. The battery according to claim 1, wherein: The battery further has a third direction, and the first direction, the second direction and the third direction are perpendicular to each other; The connecting member extends along the second direction and has a columnar structure. Both ends of the connecting member are respectively connected to two hole walls of the pole hole that extend along the third direction and are opposite to each other.

13. The battery according to claim 1, wherein: The battery further has a third direction, and the first direction, the second direction and the third direction are perpendicular to each other; A dimension of the gap in the second direction is greater than a dimension of the tab in the second direction.

14. The battery according to claim 13, wherein: The dimension of the gap in the third direction is greater than the dimension of the tab in the third direction.

15. The battery according to claim 1, further comprising: A sealing member is provided between the inner wall of the accommodating hole and the outer periphery of the pole body to seal and connect the accommodating hole and the pole body.

16. The battery according to claim 2, wherein: An obtuse angle is formed between the extending section and the fitting section.

17. The battery according to claim 10, wherein: The included angle is an obtuse angle.

18. The battery according to claim 1, wherein: A dimension of the gap in the second direction is 4 mm to 6 mm larger than a dimension of the tab in the second direction.

19. The battery according to claim 4, wherein: A dimension of the gap in the third direction is 4 mm to 6 mm larger than a dimension of the tab in the third direction.

20. An electrical device comprising the battery according to any one of claims 1 to 19.

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