Battery and electric device

Abstract

The utility model discloses a battery and a power utilization device, relates to the technical field of batteries, and is used for solving the problem of low space utilization rate of an existing battery. The battery provided by the utility model 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 an accommodating hole penetrating through the first plate surface and the second plate surface, the first plate surface and the second plate surface are respectively positioned at two ends of the cover plate in the first direction Z, and the second plate surface is arranged towards a battery cell; the tab is arranged on one side, facing the second plate surface, of the battery cell; the pole column comprises a pole column body and a connecting piece, the pole column body is arranged in the accommodating hole and is provided with a pole column hole penetrating in the first direction Z, the connecting piece extends in the second direction X and is mounted in the pole column hole, a gap is defined by the connecting piece and part of the hole wall of the pole column hole, and the pole lug penetrates through the gap and is electrically connected with the connecting piece. According to the invention, the tab directly penetrates through the gap in the pole, and a space does not need to be reserved for bending the tab, so that the space utilization rate of the battery is improved.

Description

Technical Field

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

[0002] like Figure 1 As shown, in the manufacturing process of a multi-electrode battery, when the pole ear 02 on the core 01 in the battery is welded to the cover plate 03 in the top cover, the cover plate 03 and the pole ears 02 on the core 01 on both sides of the cover plate 03 are placed in a welding fixture for welding. Then, the cores 01 on both sides of the cover plate 03 are closed, and the closed cores 01 are fixed together with adhesive tape, and then wrapped with polyester film, inserted into the shell, and the top cover is laser welded. In the process of closing the core, the first pole ear 021 close to the outside of the core 01 is easily torn off, and after closing the core, the second pole ear 022 on the inside of the core 01 will be redundant, and its redundant part is easily inserted into the core 01, causing a short circuit.

[0003] At the same time, in this manufacturing process, the pole ear is in a bent state in most cases. In order to reserve space for the bent pole ear and prevent the pole ear from being squeezed, the plastic 04 under the top cover is provided with bosses 041 extending along the height direction on opposite sides in the width direction. The two bosses 041 are respectively abutted against the shoulders of the winding core 01 on opposite sides in the width direction, so as to reserve space for the bent pole ear 02, resulting in sacrificing part of the space utilization in the height direction. Utility Model Content

[0004] The present application provides a battery and an electrical device, which can solve the problem of low space utilization of existing batteries.

[0005] To achieve the above-mentioned purpose, the battery provided in the present application has a first direction Z and a second direction X that are perpendicular to each other, and the battery comprises:

[0006] A cover plate, comprising a first plate surface, a second plate surface, and a receiving hole penetrating 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 Z;

[0007] A battery cell, wherein the second plate surface is arranged toward the battery cell;

[0008] A tab, provided on a side of the battery cell facing the second plate surface;

[0009] The pole comprises a pole body and a connecting piece, wherein the pole body is arranged in the accommodating hole and is provided with a pole hole passing through along the first direction Z, the connecting piece extends along the second direction X, and is installed in the pole hole, and is surrounded with part of the hole wall of the pole hole to form a gap, and the pole ear is passed through the gap and is electrically connected to the connecting piece.

[0010] In this way, during the specific installation, the battery cell is placed in the outer shell, and then the cover plate and the outer shell are assembled, so that the pole ear on the battery cell passes through the gap formed by the connecting piece and part of the hole wall of the pole hole, avoiding reserving space for bending the pole ear 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.

[0011] In some embodiments of the present application, the pole ear includes an extension section and a fitting section, the two ends of the extension section are respectively connected to the battery cell and the fitting section, the connecting member includes a connecting surface, the connecting surface is arranged back to the battery cell, the extension section is passed through the pole hole, and the fitting section is fitted and connected to the connecting surface.

[0012] 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;

[0013] The pole 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 together form the pole hole, the connecting member is connected to the second side portions, and is spaced apart from the first side portions to form the gap, the first side portion has an inclined surface facing the battery cell, and 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.

[0014] In some embodiments of the present application, the battery further comprises:

[0015] 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 Y decreases.

[0016] In some embodiments of the present application, the lower plastic has a first wall surface, the first wall surface faces the pole ear, and the large opening end of the first hole segment is located on the first wall surface.

[0017] In some embodiments of the present 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 disposed against the battery core.

[0018] 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;

[0019] There are multiple battery cells, and the multiple battery cells are arranged in sequence along the third direction Y. Each battery cell is provided with a pole ear on the side facing the second plate surface. There is one connecting surface, which is a flat surface or an arc surface 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.

[0020] 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;

[0021] There are multiple battery cells, and the multiple battery cells are arranged in sequence along the third direction Y. The side of each battery cell facing the second plate surface is provided with the pole ear. There are two connecting surfaces. Each pole ear includes the extension section and the 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.

[0022] In some embodiments of the present application, the end of the pole hole away from the battery cell is provided with a step surface, the step surface faces away from the battery cell, and the battery further includes:

[0023] A connecting piece is arranged on the step surface and seals the pole hole. The two surfaces of the fitting section in the first direction Z are respectively a welding surface and an outer side surface, and the welding surface is welded to the connecting surface. In the first direction Z, the step surface is away from the connecting piece relative to the outer side 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;

[0025] The connecting member extends along the second direction X and has a columnar structure. Two ends of the connecting member are respectively connected to two hole walls of the pole hole that extend along the third direction Y and are arranged opposite to each other.

[0026] 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;

[0027] The size of the gap in the second direction X is greater than the size of the tab in the second direction X, and the size of the gap in the third direction Y is greater than the size of the tab in the third direction Y.

[0028] In some embodiments of the present application, the battery further comprises:

[0029] The sealing member is arranged between the inner wall of the receiving hole and the outer periphery of the pole body to seal and connect the receiving hole and the pole body.

[0030] On the other hand, the present application also provides an electrical device, which includes a battery as described in any of the above technical solutions.

[0031] Since the electrical device provided in the present application includes a battery as described in any of the above technical solutions, both can solve the same problem and achieve the same effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0033] Figure 1 It is a schematic diagram of the structure of a battery in the prior art;

[0034] Figure 2 is an exploded view of a battery in an embodiment of the present application;

[0035] Figure 3 is a front view of a battery in some embodiments of the present application;

[0036] Figure 4 yes Figure 3 The schematic diagram of the cross-sectional structure of the battery shown at line AA;

[0037] Figure 5 yes Figure 4 A magnified view of part B in FIG.

[0038] Figure 6 is a stereogram of a pole in some embodiments of the present application;

[0039] Figure 7 yes Figure 6 The cross-sectional structure diagram of the pole at the CC line shown;

[0040] Figure 8 is a stereogram of a pole in some other embodiments of the present application;

[0041] Fig. 9 is a front view of a battery in some other embodiments of the present application;

[0042] Fig.10 yes Fig. 9The schematic diagram of the cross-sectional structure of the battery shown at the DD line;

[0043] Fig.11 yes Fig.10 The enlarged view of part E in FIG.

[0044] Fig.12 is a stereogram of a pole in some other embodiments of the present application;

[0045] Fig.13 It is a stereoscopic diagram of the pole in other embodiments of the present application.

[0046] The main reference numerals in the drawings of this application specification are described as follows:

[0047] 1-cover plate; 11-first plate surface; 12-second plate surface; 13-accommodation hole; 14-explosion-proof valve; 15-liquid injection hole;

[0048] 2-Battery cell;

[0049] 3-ear; 31-extension section; 32-fitting section;

[0050] 4-pole; 41-pole body; 411-pole hole; 4111-step surface; 412-first side; 4121-inclined surface; 413-second side; 42-connector; 421-connecting surface; 43-gap;

[0051] 5-lower plastic; 51-mounting hole; 511-first hole section; 52-first wall surface; 53-second wall surface;

[0052] 6-connecting piece;

[0053] 7-housing; 71-opening; 72-accommodating space;

[0054] Z-first direction; X-second direction; Y-third direction. DETAILED DESCRIPTION

[0055] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0056] In the drawings, the shapes and dimensions may be exaggerated for clarity, and the same reference numerals will be used throughout to designate the same or like components.

[0057] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In particular, "height" is equivalent to the dimension from top to bottom, "width" is equivalent to the dimension from left to right, and "depth" is equivalent to the dimension from front to back. They are relative concepts, and therefore may change accordingly according to their different positions and different usage states. Therefore, these or other orientations should not be interpreted as restrictive terms.

[0058] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0059] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0060] In the embodiments of the present application, the terms "multiple" and "multiple" refer to two or more. In the embodiments of the present application, unless otherwise specified, the description "parallel" means approximately parallel within a certain error range, and the error range can be a range of less than or equal to 5° relative to the absolute parallel deviation angle. The description "perpendicular" means approximately perpendicular within a certain error range, and the error range can be a range of less than or equal to 5° relative to the absolute perpendicular deviation angle.

[0061] The present application provides a battery and an electrical device, which are described in detail below. It should be noted that the description order of the following embodiments does not limit the preferred order of the embodiments of the present application. In the following embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0062] Figure 2Only some components of the battery are schematically shown, and the actual shape, size, position and structure of these components are not subject to Figure 2 In some other examples, the battery may also include 3, 4 or more battery cells 2.

[0063] Reference Figure 2 , the battery provided in the present application is in the shape of a rectangular parallelepiped, based on which, 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 electrical devices such as vehicles, ships, or aircraft to provide electrical energy to the above-mentioned devices. The battery disclosed in the embodiments of the present application includes but is not limited to being used in electrical devices such as vehicles, ships, or aircraft. The electrical devices include but are not limited to mobile phones, tablets, laptops, battery cars, electric cars, ships, spacecraft, etc.

[0064] The following embodiments are further described on the basis of two battery cells 2 arranged in the third direction Y, which cannot be regarded as a special limitation to the present application.

[0065] Reference Figure 2 The battery comprises a cover plate 1, a battery cell 2, a tab 3 and a pole 4.

[0066] The cover plate 1 is in the shape of a rectangular plate, and has a first plate surface 11, a second plate surface 12, and a receiving hole 13 that passes 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 be used for installing the pole body 41 of the pole 4. The first plate surface 11 and the second plate surface 12 are respectively located at the two 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.

[0067] The pole 4 includes a pole body 41 and a connector 42. The pole body 41 is disposed 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 receiving hole 13. The connector 42 extends along the second direction X and is installed in the pole hole 411, and is surrounded with a part of the hole wall of the pole hole 411 to form a gap 43. The pole ear 3 extends into and penetrates the gap 43 and is electrically connected to the connector 42. The second direction X is perpendicular to the first direction Z, wherein the first direction Z may be the height direction of the battery, and the second direction X may be the length direction of the battery.

[0068] During the specific installation, the battery cell 2 is placed in the shell 7, and then the cover plate 1 and the shell 7 are assembled so that the pole ear 3 on the battery cell 2 passes through the gap 43 formed by the connecting piece 42 and part of the hole wall of the pole hole 411, thereby reducing the reserved space provided for the bent pole ear 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.

[0069] At the same time, when the battery cell 2 is installed in the housing 7, the step of closing the battery cell 2 is omitted, thereby avoiding the risk of breaking the tab 3 and the tab 3 being redundant or inserted during the closing process, which is beneficial to improving the safety and service life of the battery cell 2. In addition, a connector 42 is provided in the pole body 41 of the pole 4, and the tab 3 is inserted into the gap 43 formed by the connector 42 and a part of the hole wall of the pole hole 411, and the tab 3 is electrically connected to the connector 42, so as to facilitate the connection and fixation of the tab 3.

[0070] The connector 42 is installed in the pole hole 411. One end of the connector 42 is connected to the hole wall of the pole hole 411 and the other end is a free end. The two ends of the connector 42 are connected to the hole walls of the opposite sides of the pole hole 411. The connector 42 can be detachably connected to the pole body 41 and then fixedly installed together by means of a snap connection, a threaded connection, a welding connection, etc. Alternatively, the connector 42 can also form a non-detachable integrated structure with the pole body 41. This application does not make specific restrictions on this.

[0071] It can be understood that there are multiple battery cells 2 , that is, there are at least two battery cells 2 , and the multiple battery cells 2 are arranged in sequence along the third direction Y. The second plate surface 12 is disposed toward or facing the battery cells 2 .

[0072] The following is a detailed description of the same structure of the pole 4 in each embodiment.

[0073] Figure 3 is a front view of a battery in some embodiments of the present application, Figure 4 yes Figure 3 The schematic diagram of the cross-sectional structure of the battery at the AA line is shown. Figure 5 yes Figure 4 Please refer to the enlarged view of part B in Figure 3 to Figure 5 The pole ear 3 includes an extension section 31 and a fitting section 32. The two ends of the extension section 31 are respectively connected to the battery cell 2 and the fitting section 32. The fitting section 32 is bent relative to the extension section 31. The connector 42 includes a connecting surface 421. The connecting surface 421 is arranged to face away from the battery cell 2. The extension section 31 is inserted into the pole hole 411. The fitting section 32 is fitted and connected to the connecting surface 421. The fitting section 32 and the connecting surface 421 are connected in a face-to-face fitting manner, which can ensure the connection reliability between the fitting section 32 and the connector 42.

[0074] Figure 6 is a stereogram of a pole in some embodiments of the present application, Figure 7 yes Figure 6 The cross-sectional structure diagram of the pole at the CC line is shown in FIG. Figure 5 , Figure 6 and Figure 7 The pole body 41 of the pole 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 form a pole hole 411; the connecting member 42 is connected to the second side portion 413, and is spaced apart from the first side portion 412 to form a gap 43. The first side portion 412 has an inclined surface 4121 facing the battery cell 2. In the direction from the first side portion 412 to the connecting member 42, the inclined surface 4121 is inclined in a direction away from the battery cell 2. This arrangement can further avoid the extension section 31 of the pole ear 3 from contacting the bottom of the first side portion 412 of the pole body 41, preventing the pole ear 3 from being compressed by the bottom of the pole body 41, and reducing the risk of damage and tearing of the pole ear 3 when the battery cell 2 is impacted or vibrated.

[0075] Specifically, Figure 6 As shown, the pole body 41 is a hollow square structure, the hollow part of which constitutes the pole hole 411, and the pole 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. Among them, the first side portion 412 includes a first side wall and a third side wall that extend along the second direction X and are opposite to each other. The second side portion 413 includes a second side wall and a fourth side wall that extend along the third direction Y and are opposite to each other, and the two ends of the connecting member 42 are respectively connected to the opposite sides of the second side wall and the fourth side wall to separate the pole hole 411 into two gaps 43 along the third direction Y.

[0076] 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, which is connected to the cover plate 1 and is located between the battery cell 2 and the cover plate 1. A mounting hole 51 is provided on the lower plastic 5, and the portion of the pole body 41 close to the battery cell 2 is installed in the mounting hole 51. The mounting hole 51 has a first hole section 511, which is arranged close to the battery cell 2. From the second plate surface 12 to the first plate surface 11, the size of the first hole section 511 in the third direction Y decreases. The present application can form an inclined wall surface by decreasing the size of the inner wall of the first hole section 511 in the third direction Y, so as to prevent the tab 3 from being compressed by the lower plastic 5, thereby reducing the risk of damage and tearing of the tab 3 when the battery cell 2 is impacted or vibrated.

[0077] For example, the present application forms an inclined wall surface by decreasing the size of the inner wall of the first hole section 511 in the third direction Y, and the inclination direction of the inclined surface 4121 is the same as the inclination direction of the inclined wall surface, and the inclination angles of the two are the same. The extension section 31 of the above-mentioned pole ear 3 is a bending section, which extends into the gap 43, and the bending section and the inclined surface 4121, as well as the bending section and the inclined wall surface, are spaced in the first direction Z. That is, the bending section does not contact the inclined surface 4121, and does not contact the inclined wall surface, so that the pole body 41 and the lower plastic 5 can be better prevented from squeezing the pole ear 3.

[0078] Among them, the lower plastic 5 has a first wall 52, the first wall 52 faces the pole ear 3, the large mouth end of the first hole segment 511 is located on the first wall 52, and the large mouth end of the first hole segment 511 located on the first wall 52 has the largest size in the third direction Y, that is, the wall thickness at this location is the thinnest, thereby better preventing the pole ear 3 from being compressed by the lower plastic 5.

[0079] In addition, the first wall surface 52 is a flat surface, and at least a part of the first wall surface 52 is arranged close to the battery cell 2. The first wall surface 52 is a horizontal surface parallel to the cover plate 1, that is, there is no need to set a boss structure in the prior art, so the connection distance between the battery cell 2 and the pole 4 arranged on the cover plate 1 can be reduced, and the internal resistance between the pole lug 3 and the pole 4 is reduced, which is beneficial to improve the life and performance of the battery cell 2.

[0080] The above provides an embodiment of "the pole ear 3 includes an extension section 31 and a fitting section 32, the two ends of the extension section 31 are respectively connected to the battery cell 2 and the fitting section 32, the fitting section 32 is bent relative to the extension section 31, the connecting member 42 includes a connecting surface 421, the connecting surface 421 is arranged to face away from the battery cell 2, the extension section 31 is passed through the pole hole 411, and the fitting section 32 is fitted and connected to the connecting surface 421."

[0081] Based on this embodiment, two bonding methods of bonding the bonding section 32 to the connecting surface 421 are described in detail below.

[0082] Embodiment 1

[0083] Reference Figure 2 , Figure 6 and Figure 7 There are multiple battery cells 2, and the multiple battery cells 2 are arranged in sequence along the third direction Y. Each battery cell 2 is provided with a pole ear 3 on the side facing the second plate surface 12. There is one connecting surface 421, which is a flat or curved surface and faces away from the battery cell 2. Each pole ear 3 includes an extension section 31 and a fitting section 32. Multiple fitting sections 32 are stacked, and the fitting section 32 closest to the battery cell 2 is connected to the connecting surface 421, ensuring that the connection area between the fitting section 32 and the connecting surface 421 is larger, and the connection is more stable and reliable.

[0084] in, Figure 6 and Figure 7 An embodiment is shown in which the connection surface 421 is planar. Figure 8 The embodiment in which the connecting surface 421 is an arc-shaped surface is shown. In other words, the connecting surface 421 has one, and in the third direction Y, the fitting sections 32 of the tabs 3 on both sides of the connecting member 42 are connected to the same connecting surface 421 .

[0085] Embodiment 2

[0086] Fig. 9 is a front view of a battery in some other embodiments of the present application, Fig.10 yes Fig. 9 The schematic diagram of the cross-sectional structure of the battery at the DD line is shown. Fig.11 yes Fig.10 The enlarged view of part E in Fig.12 9 is a stereogram of the pole in some other embodiments of the present application. Fig.12 In some other embodiments of the present application, there are multiple battery cells 2, and the multiple battery cells 2 are arranged in sequence along the third direction Y. Each battery cell 2 is provided with a pole ear 3 on the side facing the second plate surface 12. There are two connecting surfaces 421. Each pole ear 3 includes an extension 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 remaining fitting sections 32 are connected to the other of the two connecting surfaces 421. The connecting surface 421 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 2. It can also be understood that the extension surfaces of the two planes and the extension surface of the wall surface of the battery cell 2 with the pole ear 3 form a triangular structure. The structure of the connector 42 of this structure is simple and easy to form, which is conducive to reducing the number of pole ears 3 connected on each connecting surface 421, thereby reducing the size of the battery in the first direction Z.

[0087] Reference Fig.12 , Fig.13 This is a three-dimensional diagram of a pole in another embodiment provided by the present application, wherein there are two connecting surfaces 421, and the two connecting surfaces 421 are connected, and the edge formed at the connection of the two connecting surfaces 421 is located in the middle position of the pole body 41 in the third direction Y. Fig.13 , Fig.13 A three-dimensional diagram of a pole in another embodiment provided in the present application, wherein there are two connecting surfaces 421, and the two connecting surfaces 421 are not connected, while the extended surfaces of the surfaces where the two connecting surfaces 421 are located are connected, and the edge formed at the connection of the two extended surfaces is located in the middle position of the pole body 41 in the third direction Y.

[0088] It can also be understood that there are two connecting surfaces 421 , and in the third direction Y, the fitting sections 32 of the pole tabs 3 located on both sides of the connecting member 42 are respectively connected to the connecting surfaces 421 close to the pole tabs 3 .

[0089] Based on the technical solution recorded in any of the above embodiments, refer to Figure 2 , Figure 5 and Figure 6 , the battery also includes a connecting piece 6. A step surface 4111 is provided at the end of the pole hole 411 away from the battery cell 2, and the step surface 4111 is arranged to face away from the battery cell 2. The connecting piece 6 is arranged on the step surface 4111 and seals the pole hole 411. The two surfaces of the fitting section 32 in the first direction Z are respectively a welding surface and an outer side surface, and the welding surface is welded to the connecting surface 421. In the first direction Z, the step surface 4111 is away from the connector 42 relative to the outer side surface. Thus, on the one hand, it is possible to avoid interference between the connecting piece 6 and the pole ear 3 during installation, thereby causing damage to the pole ear 3. On the other hand, it is also possible to protect the pole ear 3 and avoid damage to the pole ear 3 when an external object collides with the pole ear 3. In addition, it is also possible to avoid that the connecting piece 6 is lifted up by the pole ear 3 and cannot fit with the step surface 4111, which leads to the risk of cold welding and explosion points when the connecting piece 6 is laser welded, affecting the welding effect of the connecting piece 6 and the step surface 4111, and further affecting the sealing performance of the battery cell 2. It can also be understood that the step surface 4111 is higher than the outer side surface of the pole lug 3. The connecting piece 6 is disposed on the step surface 4111, and the top surface of the connecting piece 6 is flush with the top of the pole hole 411.

[0090] For example, the connecting piece 6 includes a positive connecting piece and a negative connecting piece, the pole ear 3 includes a positive pole ear and a negative pole ear, and the pole column 4 includes a positive pole column and a negative pole column. The positive connecting piece is made of aluminum, and its size (thickness) in the first direction Z is 0.3 mm to 2 mm, and the negative connecting piece is made of copper, and its size (thickness) in the first direction Z is 0.2 mm to 2 mm.

[0091] In some embodiments of the present application, reference Figure 6 and Figure 7 The connecting member 42 extends along the second direction X and has a columnar structure. The two ends of the connecting member 42 are respectively connected to two hole walls of the pole hole 411 extending 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 multiple gaps 43. Figure 6 The illustrated connector 42 has one connector, which divides the pole hole 411 into two gaps 43 along the third direction Y. In other embodiments not shown in the drawings, the connector 42 has N connectors to divide the pole hole 411 into (N+1) gaps along the third direction Y. Correspondingly, the number of the battery cells 2 may be (N+1), and the pole lugs 3 on each battery cell 2 extend into and penetrate into the corresponding gaps.

[0092] For example, continue to refer to Figure 5 and Figure 6 , an embodiment in which there are two battery cells 2 and each battery cell 2 is provided with a pole ear 3 on the side facing the cover plate 1. The pole ear 3 connected to the left battery cell 2 of the two battery cells 2 passes through the gap 43 located on the left side of the connector 42, and the pole ear 3 connected to the right battery cell 2 passes through the gap 43 located on the right side of the connector 42. This application is exemplified by the fact that there are two battery cells 2, which cannot be regarded as a special limitation to this application.

[0093] Alternatively, when there are three battery cells 2, two groups of pole tabs 3 can be extended into one of the two gaps 43 and one group of pole tabs 3 can be extended into the other gap 43, as long as all the pole tabs 3 are extended from the gaps 43 and connected to the connecting surface 421. This embodiment is not shown in the figure.

[0094] Alternatively, in some other embodiments, the connecting member 42 is connected to the middle position of the pole body 41 in the third direction Y. Figure 6 The connecting piece 42 divides the pole hole 411 into two gaps 43 along the third direction Y. The two gaps 43 have the same size in the third direction Y, so that the pole lug 3 can extend from each gap 43 and connect to the connecting piece 42 .

[0095] 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 pass through the corresponding gap 43 and connect with the connector 42. For example, the size of the gap 43 in the second direction X is 4mm to 6mm 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 4mm to 6mm larger than the size of the tab 3 in the third direction Y, so as to ensure that the volume of the pole 4 is not too large.

[0096] In some embodiments of the present application, a seal is provided between the inner wall of the receiving hole 13 of the cover plate 1 and the outer periphery of the pole body 41 to achieve a sealed connection between the cover plate 1 and the pole body 41. For example, the seal may be a sealing rubber ring provided on the outer periphery of the pole body 41, or a sealant filled between the inner wall of the receiving hole 13 of the cover plate 1 and the outer periphery of the pole body 41, and the present application does not specifically limit the specific structure of the seal.

[0097] In some embodiments of this application, please continue to refer to Figure 2The battery also includes a shell 7, and an opening 71 is provided on one side wall of the shell 7. The shape and size of the cover plate 1 should be adapted to the shape and size of the opening 71 on the shell 7 to close the opening 71 and protect the battery cell 2 installed in the shell 7. The end cover 1 can be made of a material with a certain hardness to prevent the cover plate 1 from deforming when impacted by an external force, and the external force is transmitted to the battery cell 2 via the cover plate 1, causing damage to the battery cell 2. For example, the shell 7 is made of aluminum, a metal material, to ensure that the battery has a good heat dissipation effect. The shell 7 can also be made of copper, iron, aluminum alloy and other materials.

[0098] At the same time, an opening 71 is provided on one side wall of the housing 7, and a receiving space 72 is formed therein, the receiving space 72 is used to receive the battery cell 2, the cover plate 1 is provided 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 plate surface of the cover plate 1 facing the receiving space of the housing 7. In this example, the tab 3 is provided on the side of the battery cell 2 facing the second plate surface 12, which can be understood as the tab 3 is provided on the top side of the battery cell 2, and the opening 71 of the housing 7 is provided opposite to the bottom wall thereof.

[0099] In other words, in Figure 2 In the embodiment shown, an opening 71 is provided on one side wall of the housing 7, and the corresponding battery only needs one cover plate 1 to close the one opening 71. Of course, in other embodiments not shown in the drawings, the housing 7 may also have two openings arranged opposite to each other, that is, two side walls of the housing 7 arranged opposite to each other along the first direction Z (i.e. Figure 2 The top wall and the bottom wall of the housing 7 are both provided with openings 71, and two cover plates 1 are required to respectively close the two openings. Based on this, the two cover plates 1 facing the housing space 72 of the housing 7 are defined as the second plate surface 12.

[0100] For the embodiment in which an opening 71 is provided on a side wall (top wall) of the housing 7, a pole ear 3 is connected to the wall surface (top wall surface) of the battery cell 2 close to the opening 71, and the opening is rectangular. For the embodiment in which openings are provided on two side walls of the housing that are opposite to each other along the first direction Z, pole ears are connected to the two wall surfaces (top wall surface and bottom wall surface) of the battery cell close to the two openings. The number of openings, the shape of the openings, and the size of the openings on the housing 7 cannot be regarded as special limitations on the present application. In the specific manufacturing process, the specific shape and size of the housing 7 can be determined according to the specific shape and size of the battery cell 2.

[0101] In some embodiments of the present application, the present application further provides an electric device, which includes a battery as described in any of the above technical solutions. Since the electric device provided by the present application includes a battery as described in any of the above technical solutions, the two can solve the same problem and achieve the same effect.

[0102] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0103] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims. In addition, the specification uses specific examples to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and its core idea of ​​the present application. The content of this specification should not be understood as a limitation on the present application.

Claims

1. A battery having a first direction (Z) and a second direction (X) perpendicular to each other, characterized in that: The battery comprises: A cover plate (1) comprising a first plate surface (11), a second plate surface (12), and a receiving hole (13) penetrating the first plate surface (11) and the second plate surface (12), wherein the first plate surface (11) and the second plate surface (12) are respectively located at two ends of the cover plate (1) in the first direction (Z); A battery core (2), wherein the second plate surface (12) is arranged toward the battery core (2); A pole ear (3) is arranged on a side of the battery core (2) facing the second plate surface (12); A pole (4) comprises a pole body (41) and a connecting piece (42); the pole body (41) is arranged in the accommodating hole (13) and is provided with a pole hole (411) penetrating along the first direction (Z); the connecting piece (42) extends along the second direction (X) and is installed in the pole hole (411) and is surrounded with a part of the hole wall of the pole hole (411) to form a gap (43); the pole ear (3) is passed through the gap (43) and is electrically connected to the connecting piece (42).

2. The battery according to claim 1, characterized in that The pole lug (3) comprises an extension section (31) and a fitting section (32), the two ends of the extension section (31) are respectively connected to the battery cell (2) and the fitting section (32), the connecting member (42) comprises a connecting surface (421), the connecting surface (421) is arranged with its back facing the battery cell (2), the extension section (31) is inserted into the pole hole (411), and the fitting section (32) is fitted and connected to the connecting surface (421).

3. The battery according to claim 2, characterized in that 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; The pole body (41) comprises 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 enclose the pole 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 the gap (43), the first side portion (412) has an inclined surface (4121) facing the battery cell (2), and in the direction from the first side portion (412) to the connecting member (42), the inclined surface (4121) is inclined in a direction away from the battery cell (2).

4. The battery according to claim 3, characterized in that Also includes: The lower plastic (5) is connected to the cover plate (1) and is located between the battery cell (2) and the cover plate (1). The lower plastic (5) is provided with a mounting hole (51). The portion of the pole 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). The first hole section (511) is arranged close to the battery cell (2). From the second plate surface (12) to the first plate surface (11), the size of the first hole section (511) in the third direction (Y) decreases.

5. The battery according to claim 4, characterized in that The lower plastic (5) has a first wall surface (52), the first wall surface (52) faces the pole lug (3), and the large opening end of the first hole section (511) is located on the first wall surface (52).

6. The battery according to claim 4, characterized in that The lower plastic (5) has a first wall surface (52), the first wall surface (52) is a flat surface, and the first wall surface (52) is at least partially disposed close to the battery core (2).

7. The battery according to claim 2, characterized in that 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; There are a plurality of battery cells (2), and the plurality of battery cells (2) are arranged in sequence along the third direction (Y); each of the battery cells (2) is provided with a pole lug (3) on the side facing the second plate surface (12); there is one connecting surface (421), which is a flat surface or an arcuate surface and faces away from the battery cell (2); each pole lug (3) comprises an extension section (31) and a fitting section (32); a plurality of fitting sections (32) are stacked and are all connected to the connecting surface (421).

8. The battery according to claim 2, characterized in that 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; There are a plurality of battery cells (2), and the plurality of battery cells (2) are arranged in sequence along the third direction (Y); each battery cell (2) is provided with a pole ear (3) on a side facing the second plate surface (12); there are two connecting surfaces (421); each pole ear (3) comprises an extension section (31) and a fitting section (32); some of the fitting sections (32) in the plurality of fitting sections (32) are connected to one of the two connecting surfaces (421), and the remaining fitting sections (32) are connected to the other of the two connecting surfaces (421); the connecting surface (421) is a plane; the surfaces where the two planes are located intersect to form an angle; the opening of the angle faces the battery cell (2).

9. The battery according to any one of claims 2 to 8, characterized in that The end of the pole hole (411) away from the battery cell (2) is provided with a step surface (4111), and the step surface (4111) faces away from the battery cell (2). The battery further comprises: A connecting piece (6) is arranged on the step surface (4111) and seals the pole hole (411); the two surfaces of the fitting section (32) in the first direction (Z) are respectively a welding surface and an outer side surface, and the welding surface is welded to the connecting surface (421); in the first direction (Z), the step surface (4111) is away from the connecting piece (42) relative to the outer side surface.

10. The battery according to claim 1, characterized in that 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; The connecting member (42) extends along the second direction (X) and has a columnar structure, and the two ends of the connecting member (42) are respectively connected to two hole walls of the pole hole (411) extending along the third direction (Y) and arranged opposite to each other.

11. The battery according to claim 1, characterized in that 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; The size of the gap (43) in the second direction (X) is greater than the size of the pole lug (3) in the second direction (X), and the size of the gap (43) in the third direction (Y) is greater than the size of the pole lug (3) in the third direction (Y).

12. The battery according to claim 1, characterized in that Also includes: A sealing member is provided between the inner wall of the accommodating hole (13) and the outer periphery of the pole body (41) to seal and connect the accommodating hole (13) and the pole body (41).

13. An electrical device, characterized in that: The invention comprises the battery according to any one of claims 1 to 12.

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