Battery end cover, battery and module

Abstract

The utility model relates to the technical field of batteries, in particular to a battery end cover, a battery and a module, and the battery end cover comprises a current collector and a lower insulating component; wherein the current collector is bent; a mounting cavity and a mounting port communicated with the mounting cavity are formed in the lower insulating component, and the current collector is mounted in the mounting cavity through the mounting port; the inner wall of the mounting cavity is provided with at least two first positioning parts which are oppositely arranged, and the at least two first positioning parts are arranged close to the two opposite sides of at least part of the structure of the current collector respectively. Therefore, in the battery end cover provided by the invention, the at least two first positioning parts of the lower insulating component have a limiting effect on the current collector, so that the bent current collector can be ensured to have a certain activity space in the mounting cavity, meanwhile, the current collector plate can be prevented from being twisted, and the current collector is mounted in the mounting cavity of the lower insulating component, so that the current collector plate is prevented from being twisted. Therefore, the current collector is prevented from being in contact with the shell to cause short circuit of the battery, and the battery is safer and more reliable.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery end cover, a battery and a module. Background Art

[0002] At present, cylindrical batteries often include a winding core, a shell and an end cover. The winding core is installed in the shell and sealed by the end cover. The end cover includes a bare aluminum sheet, a pole, an upper insulating component, i.e. an upper insulating structure, a lower plastic, i.e. a lower insulating structure, and a current collecting plate, i.e. a connecting plate. The winding core is connected to the pole through the current collecting plate, i.e. a connecting plate. In the cylindrical battery structure, the connecting plate is installed between the battery and the lower plastic. It has no positioning and support, and is prone to twisting and deformation, which eventually leads to battery damage. Utility Model Content

[0003] The purpose of the present application is to provide a battery end cover, a battery and a module, which to a certain extent solves the technical problem that in the cylindrical battery structure existing in the prior art, the connecting piece is installed between the battery and the lower plastic, has no positioning and support, is prone to twisting and deformation, and ultimately causes battery damage.

[0004] The present application provides a battery end cover, comprising: a current collector and a lower insulating member; wherein the current collector is bent; the lower insulating member is formed with an installation cavity and an installation port connected to the installation cavity, and the current collector is installed in the installation cavity through the installation port; the inner wall of the installation cavity is provided with at least two oppositely arranged first positioning portions, and at least two of the first positioning portions are respectively arranged near opposite sides of at least a partial structure of the current collector.

[0005] In the above technical solution, further, along the width direction of the current collector, at least one side of the current collector is formed with an open positioning hole;

[0006] The lower insulating member is formed with a second positioning portion, and the second positioning portion is inserted into the positioning hole.

[0007] In any of the above technical solutions, further, along the width direction of the current collector, at least another side of the current collector is formed with a positioning angle; the lower insulating member is formed with a V-shaped third positioning portion, and the positioning angle is adapted to one side of the third positioning portion.

[0008] In any of the above technical solutions, further, a side of the first positioning portion close to the current collector is in a convex shape, and a side of the first positioning portion away from the current collector is in a groove shape.

[0009] In any of the above technical solutions, further, a reinforcing rib is provided in the first groove-shaped positioning portion.

[0010] In any of the above technical solutions, further, along the height direction of the current collector, the current collector is divided into an upper structure and a lower structure, at least two of the first positioning portions are respectively arranged near the opposite sides of the upper structure of the current collector, and at least two of the first positioning portions are also respectively against the upper surface of the lower structure of the current collector.

[0011] In any of the above technical solutions, further, along the height direction of the current collector, a welding protrusion is formed on the lug side of the current collector close to the battery cell.

[0012] In any of the above technical solutions, further, a groove is formed on the side of the welding protrusion close to the lower insulating component, a fourth positioning portion is formed at the bottom of the first positioning portion along its height direction, and the fourth positioning portion abuts against the bottom of the groove.

[0013] In any of the above technical solutions, further, the battery end cover also includes an explosion-proof valve, and along the height direction of the battery end cover, the lower insulating member is arranged below the explosion-proof valve; a corresponding area of ​​the lower insulating member located below the explosion-proof valve is formed with an exhaust through hole connected to the installation cavity, and a corresponding area of ​​the current collector located below the exhaust through hole is formed with a notch.

[0014] In any of the above technical solutions, further, the current collector includes at least three connecting parts arranged in sequence, and any two adjacent connecting parts are connected by a bending part, and when the current collector is unfolded, the thickness of the bending part is smaller than the thickness of any of the connecting parts to form a groove shape.

[0015] In any of the above technical solutions, further, along the height direction of the current collector, the height of the current collector is less than the depth of the installation cavity.

[0016] In any of the above technical solutions, further, along the height direction of the lower insulating component, the bottom of the lower insulating component is formed with the installation opening; the first positioning portion is formed on the top wall of the installation cavity, and the height of the first positioning portion is less than the depth of the installation cavity.

[0017] In any of the above technical solutions, further, the battery end cover also includes a cover plate, an upper insulating member, a rivet, a riveting block and a sealing ring;

[0018] Wherein, the lower insulating member is mounted on the lower surface of the cover plate along the height direction thereof; the cover plate is formed with a mounting through hole, the current collector is formed with a pole mounting hole corresponding to the mounting through hole, the rivet is sequentially mounted in the mounting through hole and the pole mounting hole, and the bottom end limit portion of the rivet extends to the side of the current collector away from the cover plate, and the sealing ring is compressed between the bottom end limit portion of the rivet and the current collector; the top end connecting portion of the rivet extends to the outside of the cover plate;

[0019] The upper insulating member and the rivet block are sequentially sleeved on the outside of the rivet, and the upper insulating member is spaced between the rivet block and the cover plate; the rivet block is connected to the rivet by welding; the rivet block is formed with an annular step protruding away from the cover plate side.

[0020] The present application also provides a battery, comprising a shell, a winding core, and a battery end cover as described in any of the above technical solutions, wherein the winding core is installed in the shell, and the battery end cover is sealed at the opening of the shell; the pole ear of the winding core is connected to the current collector by welding. Therefore, all the beneficial technical effects of the battery end cover are obtained, which will not be described in detail here.

[0021] The present application also provides a battery, comprising a bracket, a connecting row and a plurality of batteries described in any of the above technical solutions, wherein the plurality of batteries are arranged in a square array, and are connected in series or in parallel through the plurality of connecting rows to form a battery pack; the number of the brackets is two, and along the height direction of the battery pack, the two brackets are respectively arranged at the top and bottom ends of the battery pack; the bracket is formed with a through hole, and the rivet block of the battery end cover extends to the outside of the bracket through the through hole, and the corresponding connecting row is sleeved on the outside of the annular step of the rivet block and connected by welding. Therefore, all the beneficial technical effects of the battery are obtained, which will not be repeated here.

[0022] In any of the above technical solutions, further, any of the brackets is formed with mounting grooves corresponding one-to-one to the plurality of batteries, and the batteries are installed in the corresponding mounting grooves.

[0023] Compared with the prior art, the beneficial effects of this application are:

[0024] In the battery end cover provided in the present application, at least two first positioning portions of the lower insulating member have a limiting function on the current collector, which can not only ensure that the bent current collector has a certain amount of activity space in the installation cavity, but also prevent the current collector from twisting. Moreover, the current collector is installed in the installation cavity of the lower insulating member and is insulated and protected by the lower insulating member, thereby avoiding contact between the current collector and the shell to cause a short circuit in the battery, which is safer and more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 A schematic diagram of the structure of the lower insulating member provided in an embodiment of the present application;

[0027] Figure 2 Another schematic diagram of the structure of the lower insulating member provided in an embodiment of the present application;

[0028] Figure 3 A schematic diagram of the structure of the current collector provided in an embodiment of the present application;

[0029] Figure 4 Another schematic diagram of the structure of the current collector provided in an embodiment of the present application;

[0030] Figure 5 Another schematic diagram of the structure of the current collector provided in the embodiment of the present application;

[0031] Figure 6 A schematic diagram of the expansion of the current collector provided in an embodiment of the present application;

[0032] Figure 7 for Figure 6 A schematic diagram of the enlarged structure at A;

[0033] Figure 8 A schematic diagram of the structure of a battery end cover provided in an embodiment of the present application;

[0034] Fig. 9 Another schematic diagram of the structure of the battery end cover provided in the embodiment of the present application;

[0035] Fig.10 Another structural schematic diagram of a battery end cover provided in an embodiment of the present application;

[0036] Fig.11 Another structural schematic diagram of a battery end cover provided in an embodiment of the present application;

[0037] Fig.12 A partial cross-sectional view of a battery provided in an embodiment of the present application;

[0038] Fig.13 Another schematic diagram of the structure of a battery provided in an embodiment of the present application;

[0039] Fig.14Another schematic diagram of the structure of a battery provided in an embodiment of the present application;

[0040] Fig.15 A schematic diagram of the structure of the module provided in an embodiment of the present application.

[0041] Reference numerals:

[0042] 1-current collector, 101-first connection part, 1011-notch, 102-second connection part, 103-third connection part, 1031-pole mounting hole, 104-bending part, 105-positioning hole, 106-positioning angle, 107-welding protrusion, 108-welding groove, 2-lower insulating member, 21-cover plate part, 22-enclosing part, 23-mounting cavity, 24-first positioning part, 25-first groove part, 25 1- reinforcing rib, 26- second positioning part, 27- third positioning part, 28- fourth positioning part, 29- circulation hole, 210- pole through hole, 211- exhaust through hole, 3- cover plate, 4- upper insulating member, 5- rivet, 51- bottom end limit part, 6- riveting block, 7- sealing ring, 8- explosion-proof valve, 9- explosion-proof valve patch, 10- battery end cover, 11- winding core, 12- shell, 13- battery, 14- bracket, 15- connecting row. DETAILED DESCRIPTION

[0043] The technical solution of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0044] The components of the embodiments of the present application generally described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed, but merely represents the selected embodiments of the present application.

[0045] Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of this application.

[0046] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are 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, 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 limiting the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0047] 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 or an electrical connection; it can be a direct connection, or it can be indirectly connected 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.

[0048] Refer to the following Figures 1 to 15 The battery end cap, battery and module according to some embodiments of the present application are described.

[0049] Embodiment 1

[0050] See also Figures 1 to 12 As shown, an embodiment of the present application provides a battery end cover 10, comprising: a current collector 1 and a lower insulating member 2; wherein the current collector 1 is bent; the lower insulating member 2 is formed with a mounting cavity 23 and a mounting port connected to the mounting cavity 23, and the current collector 1 is mounted in the mounting cavity 23 through the mounting port;

[0051] The inner wall of the installation cavity 23 is provided with at least two first positioning portions 24 which are arranged opposite to each other, and the at least two first positioning portions 24 are respectively arranged close to two opposite sides of at least a part of the structure of the current collector 1 .

[0052] Based on the structure described above, it can be known that in the battery end cover 10 provided in the present application, at least two first positioning portions 24 of the lower insulating component 2 have a limiting function on the current collector 1, which can not only ensure that the bent current collector 1 has a certain amount of activity space in the mounting cavity 23, but also prevent the current collector from twisting. Moreover, the current collector 1 is installed in the mounting cavity 23 of the lower insulating component 2 and is insulated and protected by the lower insulating component 2, thereby avoiding the current collector 1 from contacting the shell 12 and causing a short circuit in the battery 13, which is safer and more reliable.

[0053] Furthermore, preferably, along the height direction of the current collector 1, the height of the current collector 1 is less than the depth of the mounting cavity 23, so as to ensure that along the height direction of the current collector 1, the current collector 1 is not exposed outside the mounting cavity 23, thereby playing a role of insulation protection.

[0054] Furthermore, preferably, the material of the lower insulating component 2 is plastic, but of course, it is not limited thereto and may be other materials.

[0055] Further, preferably, Figure 1 and Figure 2As shown, the lower edge component includes a cover portion 21, a surrounding portion 22 and the aforementioned first limiting portion, and the surrounding portion 22 is arranged on the bottom surface of the cover portion 21 along its height direction, and extends along the circumference of the cover portion 21, and the surrounding portion 22 is an unclosed annular structure; the cover portion 21 and the surrounding portion 22 enclose the aforementioned installation cavity 23, and preferably, the lower edge component is an integrated structure, which can be formed by injection molding. Of course, it is not limited to this, and it can also be a split structure and then assembled together.

[0056] In this embodiment, preferably, Figures 2 to 5 As shown, along the width direction of the current collector 1, a positioning hole 105 with an opening is formed on at least one side of the current collector 1;

[0057] The lower insulating member 2 is formed with a second positioning portion 26 , and the second positioning portion 26 is inserted into the positioning hole 105 .

[0058] According to the structure described above, it can be known that the second positioning portion 26 is inserted into the corresponding positioning hole 105 to play a role in positioning one side of the current collector 1 .

[0059] Further, preferably, the number of the second positioning portions 26 is one, but is not limited thereto, and may also be two or three.

[0060] In this embodiment, preferably, Figures 2 to 5 As shown, along the width direction of the current collector 1 , at least another side of the current collector 1 is formed with a positioning bevel 106 ; the lower insulating member 2 is formed with a V-shaped third positioning portion 27 , and the positioning bevel 106 is matched with one side of the third positioning portion 27 .

[0061] According to the structure described above, the V-shaped third positioning portion 27 cooperates with the matching positioning bevel 106, thereby playing a role in limiting the other side of the current collector 1. It can be seen that along the width direction of the current collector 1, different positioning structures are designed on the opposite sides of the current collector 1, that is, one of them is the second positioning portion 26 and the other is the third positioning portion 27, which can play a fool-proof role.

[0062] Further, preferably, the number of the positioning bevel angles 106 is one, but it is not limited thereto and can also be designed according to the number of the top angles of the current collector 1 , such as two.

[0063] Of course, the limiting structure is not limited to this, and the following structure may also be adopted, for example: along the width direction of the current collector 1, second positioning portions 26 are formed on opposite sides of the current collector 1, and correspondingly, along the width direction of the current collector 1, open positioning holes 105 are formed on opposite sides of the current collector 1; or, along the width direction of the current collector 1, positioning bevels 106 are formed on both sides of the current collector 1, and V-shaped third positioning portions 27 are formed on both sides of the lower insulating member 2, and the positioning bevel 106 is adapted to one side of the third positioning portion 27, and the specific selection is based on actual needs.

[0064] In this embodiment, preferably, Figure 1 and Figure 2 As shown, the side of the first positioning portion 24 close to the current collector 1 is convex, and the side of the first positioning portion 24 away from the current collector 1 is concave, which is named as the first concave portion 25 for distinction.

[0065] According to the structure described above, designing the first positioning portion 24 as a hollow structure inside is conducive to lightweight design and helps reduce material costs. Of course, it is not limited to this, and the first positioning portion 24 can also be designed as a solid structure, specifically designed according to actual needs.

[0066] Further, preferably, the first positioning portion 24 is provided with a flow hole 29 communicating with the first groove portion 25 as a flow hole for the electrolyte.

[0067] In this embodiment, preferably, Figure 1 As shown, a reinforcing rib 251 is provided in the groove-shaped first positioning portion 24 to increase the strength.

[0068] Further, preferably, the reinforcing rib 251 may be a flat plate structure, and is disposed along the width direction of the groove and connected to the side wall of the groove as a whole.

[0069] Of course, the structure of the reinforcing rib 251 is not limited to this, and it can also be a combination structure of transverse and longitudinal rib plates, which can be selected according to actual needs.

[0070] In this embodiment, preferably, Figure 2 , Figure 3 and Figure 8 As shown, along the height direction of the current collector 1, the current collector 1 is divided into an upper structure and a lower structure (and preferably, the upper structure mainly includes the second connecting portion 102, two bending portions 104 and the third connecting portion 103 described below, and the lower structure mainly includes the first connecting portion 101 described below), at least two first positioning portions 24 are respectively arranged near the opposite sides of the upper structure of the current collector 1, and at least two first positioning portions 24 are also respectively against the upper surface of the lower structure of the current collector 1.

[0071] In this embodiment, the two first positioning portions 24 limit the current collector 1 in the width direction of the upper structure of the current collector 1, and along the height direction of the current collector 1, the two first positioning portions 24 can also provide good support for the lower structure of the current collector 1, namely, the first connecting portion 101 described below, thereby improving the strength of the structure.

[0072] In this embodiment, preferably, Figure 3 and Figure 4 As shown, along the height direction of the current collector 1 , a welding protrusion 107 is formed on the lug side of the current collector 1 close to the battery cell.

[0073] According to the structure described above, the welding protrusion 107 can be in close contact with the tab, thereby improving the reliability of welding.

[0074] In this embodiment, preferably, Figure 3 and Figure 6 As shown, a groove (named as welding groove portion 108 here for easy distinction) is formed on the side of the welding protrusion 107 close to the lower insulating member 2, and a fourth positioning portion 28 is formed at the bottom of the first positioning portion 24 along its height direction, and the fourth positioning portion 28 abuts against the bottom of the groove.

[0075] According to the structure described above, the two fourth positioning portions 28 are supported in the groove, which can effectively protect the welding interface between the first connecting portion 101 of the current collector 1 and the tab, and prevent the winding core 11 from large displacement and vibration inside the battery 13.

[0076] In this embodiment, preferably, Fig.12 As shown, the battery end cover 10 further includes a cover plate 3 and an explosion-proof valve 8, and the explosion-proof valve 8 is mounted on the cover plate 3, and the lower insulating member 2 is mounted on the lower surface of the cover plate 3 along its height direction;

[0077] A corresponding area of ​​the lower insulating component 2 located below the explosion-proof valve 8 is formed with an exhaust hole 211 connected to the installation cavity 23, and a corresponding area of ​​the collector 1 located below the exhaust hole 211 is formed with a notch 1011, and preferably, this notch 1011 runs through the upper surface, lower surface and side wall of the collector 1.

[0078] According to the structure described above, when the internal pressure of the battery 13 increases uncontrollably, the notch 1011 can effectively prevent the current collector 1 from blocking the explosion-proof valve 8 during the process of being pushed out and deformed toward both ends, thereby causing a safety risk of clogging the pressure relief hole.

[0079] Further, preferably, the notch 1011 includes three side walls and is a trapezoidal notch. Of course, the present invention is not limited thereto. The notch 1011 may also be an arc-shaped notch, etc., which can be selected according to actual needs.

[0080] In this embodiment, preferably, Figures 3 to 7 As shown, the current collector 1 includes at least three connecting parts arranged in sequence, which are named as the first connecting part 101, the second connecting part 102 and the third connecting part 103 for the convenience of distinction; and any two adjacent connecting parts, such as the first connecting part 101 and the second connecting part 102, and the second connecting part 102 and the third connecting part 103, are connected by a bending part 104, and when the current collector 1 is unfolded, the thickness of the bending part 104 is less than the thickness of any connecting part to form a groove shape, and preferably, this groove runs through both sides of the current collector 1 along its width direction. Of course, it is not limited to this. This groove may also run through only one side of the current collector 1 along the width direction of the current collector 1, or not run through both opposite sides of the current collector 1.

[0081] According to the structure described above, the thickness of the groove is thinner, and when the collecting plate is folded, the bending resistance of this part is smaller, the force required for folding is smaller, and folding is easier.

[0082] In this embodiment, preferably, Fig. 9 , Fig.11 and Fig.12 As shown, the battery end cover 10 also includes a cover plate 3, an upper insulating member 4, a rivet 5, a riveting block 6 and a sealing ring 7; wherein the lower insulating member 2 is mounted on the lower surface of the cover plate 3 along its height direction; the cover plate 3 is formed with a mounting through hole, the current collector 1 is formed with a pole mounting hole 1031 corresponding to the mounting through hole, the rivet 5 is sequentially mounted in the mounting through hole and the pole mounting hole 1031, and the bottom end limit portion 51 of the rivet 5 extends to the side of the current collector 1 away from the cover plate 3 (and preferably, the lower insulating member 2 is provided with a pole through hole 210 for mounting the pole), and a sealing ring 7 is compressed between the bottom end limit portion 51 of the rivet 5 and the current collector 1, and the sealing ring 7 plays a sealing role; the top connecting portion of the rivet 5 extends to the outside of the cover plate 3;

[0083] The upper insulating member 4 and the rivet block 6 are sequentially sleeved on the outside of the rivet 5, and the upper insulating member 4 is spaced between the rivet block 6 and the cover plate 3; the rivet block 6 and the rivet 5 are connected by welding to form an electrode terminal; the rivet block 6 is formed with an annular step protruding away from the side of the cover plate 3.

[0084] According to the structure described above, the riveted block 6 and the current collector 1 are connected by the metal rivet 5, so that the electrical connection between the two can be achieved, and the upper insulating member 4 separates the riveted block 6 from the metal cover plate 3, plays a role of insulation protection, thereby avoiding the risk of short circuit. At the same time, the lower insulating member 2 separates the current collector 1 from the cover plate 3 and the shell 12, plays a role of insulation protection, thereby avoiding the risk of short circuit.

[0085] Furthermore, preferably, the upper insulating member 4 is made of plastic, but is not limited thereto and may be made of other materials.

[0086] It should be noted that the battery end cover 10 provided in the present application is not limited to a circular shape, but can also be a square or other polygonal shape, such as a pentagon, a hexagon, etc.

[0087] Embodiment 2

[0088] See also Fig.13 and Fig.14 As shown, the second embodiment of the present application further provides a battery 13, including the battery end cover 10 of the above-mentioned first embodiment, and thus has all the beneficial technical effects of the battery end cover 10, and the same technical features and beneficial effects are not repeated.

[0089] In this embodiment, preferably, Figures 8 to 14 As shown, the battery 13 also includes a shell 12 and a winding core 11; wherein the winding core 11 is installed in the shell 12, and the battery end cover 10 is sealed at the opening of the shell 12; the pole ear of the winding core 11 is connected to the current collector 1 by welding.

[0090] Further, preferably, Fig.13 and Fig.14 As shown, along the height direction of the shell 12, openings are formed at the top and bottom of the shell 12, and any of the openings is equipped with a battery end cover 10, one of the battery end covers 10 is a positive battery end cover, and the other battery end cover 10 is a negative battery end cover, and only one of the two battery end covers 10 is provided with a liquid injection hole, a liquid injection plug, an explosion-proof valve 8 and an explosion-proof valve patch 9. Of course, it is not limited to this and can also be designed according to actual needs.

[0091] According to the structure described above, it can be seen that the battery structure provided by the present application is safe and reliable, not prone to short circuit, and the overall lightweight design meets the requirements. The current collector 1 connecting the pole ear and the riveted block 6 will not be twisted or deformed under the action of the lower insulating component 2. The structure is more reliable and has a longer service life.

[0092] It should be noted that the battery provided in the present application is not limited to being cylindrical, but may also be prismatic, such as a quadrangular prism, a pentagonal prism, or a hexagonal prism, etc., and the specific shape is selected according to actual needs.

[0093] Embodiment 3

[0094] See also Fig.15As shown, the third embodiment of the present application further provides a module, including the battery 13 described in the first embodiment above, and thus has all the beneficial technical effects of the battery 13, and the same technical features and beneficial effects are not repeated here.

[0095] In this embodiment, preferably, Fig.15 As shown, the module further includes a bracket 14 and a connecting row 15; wherein a plurality of batteries 13 are arranged in a square array and are connected in series or in parallel through a plurality of connecting rows 15 to form a battery pack;

[0096] There are two brackets 14, and along the height direction of the battery pack, the two brackets 14 are respectively arranged at the top and bottom of the battery pack;

[0097] The bracket 14 is formed with a through hole, and the riveting block 6 of the battery end cover 10 extends to the outside of the bracket 14 through the through hole. The corresponding connection row 15 is sleeved on the outside of the annular step of the riveting block 6 and connected by welding.

[0098] According to the structure described above, by changing from the original penetration welding to the exposed seam welding, under the condition of the same thickness of the connecting row 15, that is, the connecting piece, the welding penetration is reduced, the heat generated by the welding is lower, and the risk of damage to the battery 13 is smaller.

[0099] Furthermore, preferably, the top and bottom ends of the battery pack are both provided with a bracket 14 and a connection row 15 .

[0100] Further, preferably, the connecting row 15 has a rectangular plate structure, but of course, it is not limited thereto and can be selected according to actual needs.

[0101] In this embodiment, preferably, Fig.15 As shown, any bracket 14 is formed with mounting grooves corresponding to the plurality of batteries 13 one by one, and the batteries 13 are installed in the corresponding mounting grooves.

[0102] According to the structure described above, the end of the battery 13 cooperates with the mounting groove, thereby achieving the positioning function.

[0103] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery end cap, characterized in that: include: A current collector and a lower insulating component; wherein the current collector is bent; the lower insulating component is formed with an installation cavity and an installation port connected to the installation cavity, and the current collector is installed in the installation cavity through the installation port; the inner wall of the installation cavity is provided with at least two oppositely arranged first positioning portions, and at least two of the first positioning portions are respectively arranged near the opposite sides of at least a part of the structure of the current collector.

2. The battery end cover according to claim 1, characterized in that: A positioning hole with an opening is formed on at least one side of the current collector along the width direction of the current collector; The lower insulating member is formed with a second positioning portion, and the second positioning portion is inserted into the positioning hole.

3. The battery end cover according to claim 1, characterized in that: Along the width direction of the current collector, at least another side of the current collector is formed with a positioning bevel; the lower insulating member is formed with a V-shaped third positioning portion, and the positioning bevel is matched with one side of the third positioning portion.

4. The battery end cover according to claim 1, characterized in that: A side of the first positioning portion close to the current collector is in a convex shape, and a side of the first positioning portion away from the current collector is in a groove shape.

5. The battery end cover according to claim 4, characterized in that: A reinforcing rib is arranged in the first groove-shaped positioning portion.

6. The battery end cover according to claim 1, characterized in that: Along the height direction of the current collector, the current collector is divided into an upper structure and a lower structure, at least two of the first positioning portions are respectively arranged near the opposite sides of the upper structure of the current collector, and at least two of the first positioning portions are also respectively against the upper surface of the lower structure of the current collector.

7. The battery end cover according to claim 6, characterized in that: A welding protrusion is formed on the side of the current collector close to the lug of the battery cell along the height direction of the current collector.

8. The battery end cover according to claim 7, characterized in that: A groove is formed on the side of the welding protrusion close to the lower insulating member, and a fourth positioning portion is formed at the bottom of the first positioning portion along the height direction thereof, and the fourth positioning portion abuts against the bottom of the groove.

9. The battery end cover according to claim 1, characterized in that: The battery end cover further includes an explosion-proof valve, and along the height direction of the battery end cover, the lower insulating member is arranged below the explosion-proof valve; a corresponding area of ​​the lower insulating member located below the explosion-proof valve is formed with an exhaust through hole connected to the mounting cavity, and a corresponding area of ​​the current collector located below the exhaust through hole is formed with a notch; and / or The current collector comprises at least three connecting parts arranged in sequence, and any two adjacent connecting parts are connected by a bending part, and when the current collector is unfolded, the thickness of the bending part is less than the thickness of any of the connecting parts, so as to form a groove shape; and / or Along the height direction of the current collector, the height of the current collector is less than the depth of the mounting cavity; and / or The installation opening is formed at the bottom of the lower insulation member along the height direction of the lower insulation member; the first positioning portion is formed on the top wall of the installation cavity, and the height of the first positioning portion is less than the depth of the installation cavity.

10. The battery end cover according to any one of claims 1 to 9, characterized in that: The battery end cover also includes a cover plate, an upper insulating member, a rivet, a riveting block and a sealing ring; Wherein, the lower insulating member is mounted on the lower surface of the cover plate along the height direction thereof; the cover plate is formed with a mounting through hole, the current collector is formed with a pole mounting hole corresponding to the mounting through hole, the rivet is sequentially mounted in the mounting through hole and the pole mounting hole, and the bottom end limit portion of the rivet extends to the side of the current collector away from the cover plate, and the sealing ring is compressed between the bottom end limit portion of the rivet and the current collector; the top end connecting portion of the rivet extends to the outside of the cover plate; The upper insulating member and the rivet block are sequentially sleeved on the outside of the rivet, and the upper insulating member is spaced between the rivet block and the cover plate; the rivet block is connected to the rivet by welding; the rivet block is formed with an annular step protruding away from the cover plate side.

11. A battery, characterized in that: It comprises a shell, a winding core and a battery end cover as claimed in claim 10; wherein the winding core is installed in the shell, and the battery end cover is sealed at the opening of the shell; the pole ear of the winding core is connected to the current collector by welding.

12. A module, characterized in that: It comprises a bracket, a connecting row and a plurality of batteries as claimed in claim 11; wherein the plurality of batteries are arranged in a square array and are connected in series or in parallel through the plurality of connecting rows to form a battery pack; the number of the brackets is two, and along the height direction of the battery pack, the two brackets are respectively arranged at the top and bottom ends of the battery pack; wherein at least one of the brackets is formed with a through hole, and the corresponding rivet block of the battery end cover extends to the outside of the bracket through the through hole, and the corresponding connecting row is sleeved on the outside of the annular step of the rivet block and is connected by welding.

13. The module according to claim 12, characterized in that: Any of the brackets is formed with mounting grooves corresponding to the plurality of batteries one by one, and the batteries are mounted in the corresponding mounting grooves.

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