Current collecting disc, cover plate assembly, cylindrical battery, battery device and electric equipment

Abstract

The utility model discloses a collector plate, a cover plate assembly, a cylindrical battery, a battery device and electric equipment, the collector plate is used for the cover plate assembly, the collector plate comprises a welding part, a first matching part and a second matching part, and the welding part comprises a first welding area and a second welding area which are sequentially arranged in the circumferential direction of the collector plate; the first matching part corresponds to the first welding area and is suitable for being matched with the supporting part of the space ring to expose the second welding area, and the second matching part corresponds to the second welding area and is suitable for being matched with the supporting part of the space ring to expose the first welding area. The welding part of the collector plate comprises the first welding area and the second welding area, so that when the cover plate assembly is mounted, the collector plate is welded with the tab, the second welding area can be exposed for welding when the first matching part is matched with the supporting part of the space ring, and the first welding area can be exposed for welding when the second matching part is matched with the supporting part of the space ring; the weldable area of the collector plate can be increased, and the over-current requirement of high-rate charging and discharging can be met.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a current collecting plate, a cover plate assembly, a cylindrical battery, a battery device and electrical equipment. Background Art

[0002] As one of the core components of new energy vehicles, lithium-ion batteries have the advantages of high energy density, long cycle life, safety and environmental protection, and are gradually becoming the mainstream direction of the electrification era. Lithium-ion batteries are divided into hard-shell batteries, soft-pack batteries and cylindrical batteries in terms of form. Among them, cylindrical batteries are valued for their high volume energy density, simple structure, easy grouping and standardization.

[0003] In existing cylindrical batteries, the pole occupies the central area of ​​the current collecting plate, and the edge support portion of the spacer ring occupies part of the circumferential area of ​​the current collecting plate, resulting in limited actual weldable area between the current collecting plate and the pole ear. The temperature is too high during charging and discharging, and the requirements of high-rate charging and discharging cannot be met. Utility Model Content

[0004] The utility model aims to provide a current collecting plate, a cover plate assembly, a cylindrical battery, a battery device and an electrical equipment, so as to solve the problem that the welding area of ​​the current collecting plate is small.

[0005] In order to achieve the purpose of the utility model, the utility model provides the following technical solutions:

[0006] In a first aspect, the utility model provides a current collecting plate, which is used for a cover plate assembly, and the current collecting plate includes a welding portion, a first matching portion, and a second matching portion, and the welding portion includes a first welding area and a second welding area which are sequentially arranged in the circumferential direction of the current collecting plate; the first matching portion corresponds to the first welding area and is suitable for matching with a supporting portion of the spacer to expose the second welding area; the second matching portion corresponds to the second welding area and is suitable for matching with the supporting portion of the spacer to expose the first welding area.

[0007] In one embodiment, the collecting plate includes a first surface and a second surface opposite to each other, the first matching portion includes a first limiting groove extending from the first surface to the second surface, and the second matching portion includes a second limiting groove extending from the first surface to the second surface.

[0008] In one embodiment, the first limiting groove includes a first side surface and a second side surface opposite to each other in the circumferential direction of the collecting disk, the second side surface is close to the second matching portion, the first matching portion also has a first guide surface, and the first guide surface connects the first surface and the second side surface; and / or, the second limiting groove includes a third side surface and a fourth side surface opposite to each other in the circumferential direction of the collecting disk, the third side surface is close to the first matching portion, the second matching portion also has a second guide surface, and the second guide surface connects the first surface and the third side surface.

[0009] In one embodiment, the first matching portion further has a first guide surface, which is a side wall surface of the first limiting groove close to the second matching portion, and the first guide surface connects the first surface and the second surface.

[0010] In one embodiment, the first matching portion is closer to the outer periphery of the current collecting plate than the first welding area, or the first matching portion is closer to the inner periphery of the current collecting plate than the first welding area;

[0011] And / or, the second matching portion is closer to the outer circumference of the current collecting plate than the second welding area, or the second matching portion is closer to the inner circumference of the current collecting plate than the second welding area.

[0012] In one embodiment, there are multiple welding portions, and the multiple welding portions are arranged at intervals along the circumference of the collecting plate.

[0013] In a second aspect, the utility model further provides a cover plate assembly, comprising a spacer and a current collecting plate as described in any one of the various embodiments of the first aspect, wherein the current collecting plate has a first axis, the spacer is coaxially arranged with the current collecting plate, the spacer is suitable for rotating around the first axis, and the first welding area or the second welding area is exposed in the direction of the first axis.

[0014] In one embodiment, the spacer includes a main body and a supporting portion, the main body is coaxially arranged with the collecting plate, the first welding area and the second welding area are located on the outer circumference of the main body, and the supporting portion cooperates with the first mating portion or the second mating portion to expose the first welding area or the second welding area in the direction of the first axis.

[0015] In one embodiment, the support portion further includes a third matching portion, the third matching portion is opposite to the current collecting plate, and the third matching portion matches with the first matching portion or the second matching portion for positioning and limiting.

[0016] In one embodiment, the cover plate assembly further includes a pole, the pole is coaxially connected to the collecting plate, and the main body is provided with a connecting hole, and the connecting hole is cooperatively connected to one end of the pole.

[0017] In one embodiment, the pole includes a first limiting portion, and the spacer further includes a second limiting portion, the second limiting portion is connected to a side of the main body facing the pole, and the first limiting portion is cooperatively connected with the second limiting portion.

[0018] In one embodiment, the first limiting portion includes a sliding groove, and the second limiting portion is a sliding block, and the sliding block is suitable for being received in the sliding groove and sliding relative to an inner wall of the sliding groove.

[0019] In one embodiment, the cover plate assembly further includes a sealing ring, a metal block, an insulating member and a cover plate, wherein the metal block, the insulating member, the cover plate, the spacer and the current collecting plate are sequentially stacked along the direction of the first axis, and the other end of the pole away from the connecting hole is sequentially penetrated through the current collecting plate, the spacer, the sealing ring, the cover plate, the insulating member and the metal block and is conductively connected to the metal block.

[0020] In the third aspect, the utility model also provides a cylindrical battery, comprising a shell, a battery cell and a cover assembly as described in any one of the various embodiments of the second aspect, wherein the battery cell is accommodated in the shell, and the cover assembly covers the opening of the shell; the first welding area of ​​the current collecting plate is welded to a part of the pole tab of the battery cell to form a first weld mark, and the second welding area of ​​the current collecting plate is welded to a part of the pole tab of the battery cell to form a second weld mark.

[0021] In a fourth aspect, the utility model further provides a battery device, comprising a box and the cylindrical battery as described in the third aspect, wherein the cylindrical battery is disposed in the box.

[0022] In a fifth aspect, the utility model further provides an electrical device, comprising the cylindrical battery as described in the third aspect or the battery device as described in the fourth aspect.

[0023] By setting the welding portion of the current collecting plate to include a first welding area and a second welding area arranged in sequence in the circumferential direction, when the cover plate assembly is installed, the current collecting plate is welded to the pole ear, and when the first matching portion is matched with the supporting portion of the spacer, the second welding area can be exposed for welding, and when the second matching portion is matched with the supporting portion of the spacer, the first welding area can be exposed for welding, thereby increasing the weldable area of ​​the current collecting plate and meeting the overcurrent requirements of high-rate charging and discharging. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 is a perspective view of a cover assembly in a first position of an embodiment;

[0026] Figure 2 is a perspective view of a cover assembly in a second position of an embodiment;

[0027] Figure 3 is a top view of a current collecting plate of an embodiment;

[0028] Figure 4 is a top view of a spacer ring of an embodiment;

[0029] Figure 5 is a bottom view of a spacer ring of an embodiment;

[0030] Figure 6 is a top view of a pole of an embodiment;

[0031] Figure 7 is a bottom view of a pole of an embodiment;

[0032] Figure 8 is an exploded view of a cover plate assembly of an embodiment;

[0033] Fig. 9 The present invention is a schematic cross-sectional view of a cover plate assembly according to an embodiment.

[0034] Description of reference numerals:

[0035] 100-cover plate assembly;

[0036] 10-collecting plate, 11-first welding area, 111-first limiting groove, 112-first side, 12-second welding area, 121-second limiting groove, 122-third side, 123-fourth side, 13-welding portion, 14-plate body, 15-flow guide dividing groove, 16-first guide surface, 17-first welding mark, 18-second welding mark, 19-first surface;

[0037] 20-spacer, 21-main body, 211-connecting hole, 22-support part, 221-shielding plate, 222-support block, 23-third matching part, 24-second limiting part;

[0038] 30-pole, 31-column, 32-pole flange, 33-first limiting portion;

[0039] 40-sealing ring;

[0040] 50-Metal block;

[0041] 60-insulating parts;

[0042] 70-Cover. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0044] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there can be a central component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there can be a central component at the same time.

[0045] Unless otherwise defined, all technical and scientific terms used in this utility model have the same meaning as those commonly understood by technicians in the technical field of this utility model. The terms used in the specification of this utility model are only for the purpose of describing specific embodiments and are not intended to limit this utility model. The term "and / or" used in this utility model includes any and all combinations of one or more related listed items.

[0046] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0047] The embodiment of the utility model provides an electrical device, including the cylindrical battery in the embodiment of the utility model or the battery device in the embodiment of the utility model.

[0048] Optionally, the electrical equipment also includes an electrical device, and the cylindrical battery or battery device supplies power to the electrical device.

[0049] Optionally, the power-consuming device may be an electric vehicle, a hybrid vehicle, a base station, a household power load, an energy storage device, etc. The power-consuming device adopts the battery device or cylindrical battery in the embodiment of the utility model, which can meet the high-power charging and discharging requirements of the battery device.

[0050] The embodiment of the utility model further provides a battery device, comprising a box body and the cylindrical battery in the embodiment of the utility model, wherein the cylindrical battery is arranged in the box body.

[0051] Optionally, the box body is made of a material with high structural strength, specifically metal materials, high-strength plastics, ceramics, etc. The metal materials include aluminum, aluminum alloy, magnesium alloy, iron and iron alloy, etc.

[0052] Optionally, the box body can be cylindrical or in other shapes without limitation. The box body includes a bottom plate and side plates, the side plates are connected to the bottom plate and enclosed to form a receiving cavity. The receiving cavity is open at one end opposite to the bottom plate, and the cylindrical battery is received in the receiving cavity.

[0053] Optionally, the box body may be an integrated structure, that is, the bottom plate and the side plate are an integrated structure made by an integrated molding process, and the integrated molding process may be stamping, casting, etc., without limitation. The box body may also be a split structure, and the side plate and the bottom plate may be connected and fixed by welding, bonding, clamping, screwing, etc. The wall thickness of each part of the box body may be roughly uniform, that is, the thickness of the side plate may be roughly uniform, and the thickness of the bottom plate and the side plate may also be roughly the same.

[0054] The battery device adopts the cylindrical battery in the embodiment of the utility model, which can meet the demand of high-rate charging and discharging of the battery device.

[0055] The embodiment of the utility model further provides a cylindrical battery, comprising a shell, a battery cell and a cover plate assembly in the embodiment of the utility model. The battery cell is accommodated in the shell, and the cover plate assembly is covered on the opening of the shell.

[0056] Optionally, the shell is made of a material with high structural strength, specifically metal materials, high-strength plastics, ceramics, etc. The metal materials include aluminum, aluminum alloy, magnesium alloy, iron and iron alloy, etc.

[0057] Optionally, the housing includes a bottom plate and side plates, the side plates are connected to the bottom plate and enclosed to form a receiving cavity. The receiving cavity is open at one end opposite to the bottom plate, and the battery cell is received in the receiving cavity.

[0058] Optionally, the shell may be an integrated structure, that is, the bottom plate and the side plate are an integrated structure made by an integrated molding process, and the integrated molding process may be stamping, casting, etc., without limitation. The shell may also be a split structure, and the side plate and the bottom plate may be connected and fixed by welding, bonding, clamping, screwing, etc. The wall thickness of the shell may be roughly uniform everywhere, that is, the thickness of the side plate may be roughly uniform, and the thickness of the bottom plate and the side plate may also be roughly the same.

[0059] Optionally, the battery cell is formed by winding and flattening the electrode sheets, and the battery cell of the cylindrical battery is cylindrical, with electrode ears connected to both ends along the axis of the battery cell.

[0060] Optionally, the cover plate assembly includes a cover plate, which is connected to the opening of the shell to close the accommodating cavity. The connection between the cover plate and the shell can be welding, bonding, clamping, screwing, etc., without limitation. The shape of the cover plate can be roughly the same as that of the bottom plate.

[0061] Optionally, both the bottom plate and the cover plate are circular.

[0062] The cylindrical battery in the embodiment of the utility model can meet the high-rate charging and discharging requirements of the battery device by adopting the cover plate assembly in the embodiment of the utility model. Figure 1 and Figure 2 An embodiment of the utility model provides a cover plate assembly 100 , including a current collecting plate 10 and a spacer ring 20 .

[0063] The current collecting plate 10 in the embodiment of the utility model is described in detail below.

[0064] Please refer to Figure 3 The embodiment of the utility model provides a current collecting plate 10, which is used for a cover plate assembly 100. The current collecting plate 10 includes a welding portion 13, a first matching portion, and a second matching portion. The welding portion 13 includes a first welding area 11 and a second welding area 12 sequentially arranged in the circumferential direction of the current collecting plate 10. The first matching portion corresponds to the first welding area and is suitable for matching with the support portion 22 of the spacer 20 to expose the second welding area 12, and the second matching portion corresponds to the second welding area 12 and is suitable for matching with the support portion 22 of the spacer 20 to expose the first welding area 11.

[0065] Optionally, the material of the collecting plate 10 may be copper, aluminum, etc., and the shape of the collecting plate 10 may be circular, or an axisymmetric polygon, etc., without specific limitation.

[0066] Optionally, the collecting plate 10 is circular and has a first axis which is perpendicular to the plate surface of the collecting plate 10 and passes through the center of the circle.

[0067] Optionally, the number of welding parts 13 may be one or more, for example, 3, 4, 6, etc., without specific limitation.

[0068] Optionally, there are a plurality of welding portions 13 , and the plurality of welding portions 13 are arranged at intervals along the circumference of the current collecting plate 10 .

[0069] Optionally, the collecting plate 10 further includes a plate body 14 , and the plurality of welding portions 13 are respectively connected to the outer circumference of the plate body 14 .

[0070] Optionally, the welding portion 13 and the disk body 14 may be an integrated structure or a split structure, and the welding portion 13 and the disk body 14 may be connected and fixed by welding, bonding, clamping, screwing, etc., without specific limitation.

[0071] Optionally, each welding portion 13 may include a first welding area 11 and a second welding area 12 , or may include a plurality of first welding areas 11 and a plurality of second welding areas 12 , without any specific limitation.

[0072] For example, Figure 3 As shown, there are six welding portions 13 , which are arranged at intervals along the circumference of the current collecting plate, so that the first welding area and the second welding area are alternately arranged in the circumferential direction of the current collecting plate 10 .

[0073] By providing a plurality of welding portions 13 , which are spaced apart along the circumference of the current collecting disk 10 , the weldable area of ​​the current collecting disk 10 can be increased to meet the overcurrent requirements of high-rate charge and discharge.

[0074] Optionally, the current collecting plate 10 is also provided with a flow guide dividing groove 15, which is used to separate two adjacent welding parts 13, and can effectively guide the flow direction of the electrolyte or lithium ions so that they are evenly distributed on the surface of the electrode, thereby improving the energy density and charge and discharge performance of the battery. In addition, the flow guide dividing groove 15 also divides the current collecting plate 10 into multiple independent areas, which can handle different currents or voltages respectively, thereby realizing multi-channel charging and discharging, so as to improve the current density and power density of the battery and further enhance the performance of the battery.

[0075] The first welding region of the current collecting plate 10 is suitable for welding with at least part of the tab of the battery cell to form a first welding mark 17 , and the second welding region of the current collecting plate 10 is suitable for welding with at least part of the tab of the battery cell to form a second welding mark 18 .

[0076] Optional, such as Figure 1 As shown, when the second welding area is welded to a part of the tab of the battery cell to form a second weld mark 18, the first matching portion is suitable for connecting with the spacer 20 of the cylindrical battery to cover the first welding area; Figure 2 As shown, when the first welding area is welded to a part of the tab of the battery cell to form the first weld mark 17, the second matching portion is suitable for connecting to the spacer 20 of the cylindrical battery to cover the second welding area.

[0077] In the existing cylindrical battery design, the pole 30 of the cover plate assembly will occupy a large area in the center of the current collecting plate 10, and the supporting portion of the edge of the spacer 20 will occupy part of the circumferential area of ​​the current collecting plate 10, resulting in limited actual weldable area between the current collecting plate 10 and the pole ear during the cylindrical battery assembly process, and the temperature is too high during the charge and discharge process, which cannot meet the high-rate current demand, becoming one of the bottlenecks in the development of high-energy-density cylindrical batteries.

[0078] The current collecting plate 10 in the embodiment of the utility model is provided with a welding portion including a first welding area 11 and a second welding area 12. When the cover plate assembly 100 is installed, the current collecting plate 10 is welded to the pole ear. When the first matching portion is matched with the supporting portion 22 of the spacer ring 20, the second welding area 12 can be exposed for welding. When the second matching portion is matched with the supporting portion 22 of the spacer ring 20, the first welding area 11 can be exposed for welding. The weldable area of ​​the current collecting plate 10 can be increased to meet the overcurrent requirements of high-rate charging and discharging.

[0079] Optionally, the collecting plate 10 includes a first surface 19 and a second surface (not shown in the figure) opposite to each other, the first matching portion includes a first limiting groove 111 extending from the first surface 19 to the second surface, and the second matching portion includes a second limiting groove 121 extending from the first surface 19 to the second surface.

[0080] Optionally, the number of first matching parts and the number of second matching parts can be 1, 2, 3, 6, etc., ensuring that at least one first welding area 11 is correspondingly provided with a first matching part, and at least one second welding area 12 is correspondingly provided with a second matching part, without specific limitation.

[0081] Optionally, the shapes of the first limiting groove 111 and the second limiting groove 121 can be square, circular, rectangular, polygonal, etc., without specific limitation.

[0082] For example, Figure 3 As shown, there are six first matching parts and six second matching parts, the first matching parts are provided with first limiting grooves 111 , and the second matching parts are provided with second limiting grooves 121 .

[0083] By setting the first matching part of the collecting plate 10 to be provided with a first limiting groove 111, and the second matching part to be provided with a second limiting groove 121, when the second welding area 12 is welded to the pole ear, the first limiting groove 111 is matched and connected with the spacer 20, and when the first welding area 11 is welded to the pole ear, the second limiting groove 121 is matched and connected with the spacer 20. The position of the spacer 20 can be fixed to prevent the spacer 20 from excessively rotating when rotating relative to the collecting plate 10, thereby ensuring assembly stability.

[0084] Optional, such as Figure 1 , Figure 2 and Figure 3As shown, the first limiting groove 111 includes a first side surface 112 and a second side surface (not shown in the figure) opposite to each other in the circumferential direction of the collecting plate 10, the second side surface is close to the second matching portion, and the first matching portion also has a first guide surface 16, and the first guide surface connects the first surface and the second side surface; and / or, the second limiting groove 121 includes a third side surface 122 and a fourth side surface 123 opposite to each other in the circumferential direction of the collecting plate 10, the third side surface 122 is close to the first matching portion, and the second matching portion also has a second guide surface (not shown in the figure), and the second guide surface connects the first surface and the third side surface 122.

[0085] Optionally, the first guide surface 16 is located on a side of the second side surface away from the first side surface 112, and the first guide surface 16 has an angle with the first surface 19. The first guide surface 16 can be a plane or a curved surface, which is not specifically limited.

[0086] Optionally, the first guide surface 16 is a side wall surface of the first limiting groove 111 close to the second matching portion, and the first guide surface 16 connects the first surface 19 and the second surface. In this case, the second side surface is an edge connecting the first guide surface 16 and the second surface.

[0087] Similarly, the second guide surface connects the first surface 19 and the second surface, which will not be described in detail.

[0088] By setting the first guide surface 16 as the side wall surface of the first limiting groove 111 close to the second matching part, the first guide surface 16 connects the first surface 19 and the second surface, and plays a smooth transition role when the spacer 20 rotates, so as to facilitate the third matching part 23 of the spacer 20 to slide in or out.

[0089] Optionally, the spacer ring 20 rotates clockwise from one side of the first welding area 11 to the second welding area 12, and the first guide surface 16 is located on the side of the first limiting groove 111 close to the second limiting groove 121 along the clockwise direction; or, the spacer ring 20 rotates counterclockwise from one side of the first welding area 11 to the second welding area 12, and the first guide surface 16 is located on the side of the first limiting groove 111 close to the second limiting groove 121 along the counterclockwise direction. All of the above methods are possible and are not specifically limited.

[0090] Optionally, when the second welding area 12 is welded, the third matching portion 23 of the spacer 20 is located in the first limiting groove 111 to fix the position of the spacer 20. When the spacer 20 rotates, the third matching portion 23 rotates into the second limiting groove 121 through the first guide surface 16 of the collecting plate 10, and fixes the position of the spacer 20 when welding is performed in the first welding area 11.

[0091] Similarly, the configuration of the third side surface 122, the fourth side surface 123 and the second guide surface is similar to that of the aforementioned first side surface, the second side surface and the first guide surface, which can be referred to without further description.

[0092] By setting a first guide surface 16 to connect the second side surface and the first surface of the first limiting groove 111, and / or a second guide surface to connect the third side surface 122 and the first surface of the second limiting groove 121, a smooth transition is achieved when the spacer ring 20 rotates, facilitating the third matching portion 23 of the spacer ring 20 to slide in or out.

[0093] Optionally, the first matching portion is closer to the outer periphery of the current collecting plate 10 than the first welding area 11, or the first matching portion is closer to the inner periphery of the current collecting plate 10 than the first welding area 11;

[0094] And / or, the second matching portion is closer to the outer circumference of the current collecting plate 10 than the second welding region 12 , or the second matching portion is closer to the inner circumference of the current collecting plate 10 than the second welding region 12 .

[0095] For example, Figure 3 As shown, the first matching portion is closer to the outer circumference of the current collecting plate 10 than the first welding area 11 , and the second matching portion is closer to the outer circumference of the current collecting plate 10 than the second welding area 12 .

[0096] By arranging the first matching portion to be closer to the outer periphery of the collecting disk 10 than the first welding area 11, or the first matching portion to be closer to the inner periphery of the collecting disk 10 than the first welding area 11, and / or the second matching portion to be closer to the outer periphery of the collecting disk 10 than the second welding area 12, or the second matching portion to be closer to the inner periphery of the collecting disk 10 than the second welding area 12, the opening positions of the first limiting groove 111 and the second limiting groove 121 can be selected according to actual needs and arranged flexibly.

[0097] Optionally, the spacer 20 is made of insulating material, such as polyolefin, polyurethane, polypropylene, etc., without limitation.

[0098] Optional, such as Figure 1 , Figure 2 and Figure 4 As shown, the spacer 20 is coaxially arranged with the collecting plate 10. The spacer 20 is suitable for rotating around the first axis and shielding the first welding area 11 or the second welding area 12 in the direction of the first axis.

[0099] Optionally, the spacer ring 20 may be rotated manually or mechanically, without any specific limitation.

[0100] Optional, such as Figure 1 As shown, when the spacer 20 blocks the first welding area 11 in the direction of the first axis, the second welding area 12 of the collector plate 10 is welded to the tab of the battery cell; Figure 2As shown, when the spacer 20 blocks the second welding area 12 in the direction of the first axis, the first welding area 11 of the current collecting plate 10 is welded to the tab of the battery cell.

[0101] By arranging the spacer 20 coaxially with the current collecting disk 10 and shielding the first welding area 11 or shielding the second welding area 12 in the direction of the first axis, the weldable area of ​​the current collecting disk 10 can be increased to meet the overcurrent requirements of high-rate charge and discharge.

[0102] Optional, such as Figure 4 As shown, the spacer 20 includes a main body 21 and a support portion 22. The main body 21 is coaxially arranged with the collecting plate 10. The first welding area 11 and the second welding area 12 are located on the outer circumference of the main body 21. The support portion 22 cooperates with the first matching portion or the second matching portion to expose the first welding area 11 or the second welding area 12 in the direction of the first axis.

[0103] Optionally, the main body 21 and the support part 22 may be an integrated structure, that is, the main body 21 and the support part 22 are an integrated structure made by an integrated molding process, and the integrated molding process may be stamping, casting, etc., without limitation. The main body 21 and the support part 22 may also be a split structure, and the main body 21 and the support part 22 may be connected and fixed by welding, bonding, clamping, screwing, etc.

[0104] Optionally, the shape of the main body 21 can be a circular plate, a square plate, etc., without limitation. The support portion 22 is connected to the peripheral side of the main body 21 and extends away from the main body 21 in the radial direction of the main body 21. The specific shape of the support portion 22 is not limited.

[0105] Optionally, the number of the support parts 22 can be one, two, three, six, etc., corresponding to the welding area, and there is no specific limitation.

[0106] Optionally, the support portion 22 includes a shielding plate 221 and a support block 222, the support block 222 is connected to the side of the shielding plate 221 facing away from the collecting plate 10 when the shielding plate 221 is installed, and is located on the side of the shielding plate 221 away from the main body 21 in the radial direction of the spacer 20. The main body 21 and the support portion 22 can be an integrated structure or a split structure, and the two are connected and fixed by bonding, clamping, screwing, etc., and there is no specific limitation.

[0107] Optionally, the support block 222 is used to play a certain supporting role when the battery cell is subjected to insulation coating treatment, so as to reduce the height difference between the end cover components to avoid leaving too many gaps in the film.

[0108] Optionally, when the second welding area 12 of the current collecting plate 10 is welded to the pole lug of the battery cell, the support portion 22 blocks the first welding area 11 in the direction of the first axis; when the first welding area 11 of the current collecting plate 10 is welded to the pole lug of the battery cell, the support portion 22 blocks the second welding area 12 in the direction of the first axis.

[0109] Since high temperature and sparks are generated during welding, if the unwelded area is not shielded, it may be damaged. Proper shielding can prevent sparks from spattering in the welding area and also reduce the thermal impact of high temperature on the unwelded area.

[0110] By setting the spacer ring 20 including a main body 21 and a support part 22, the main body 21 is coaxially arranged with the collecting plate 10, and the support part 22 is connected to the first matching part or the second matching part. The unwelded area is shielded during welding, which can prevent sparks from spattering in the welding area and reduce the thermal impact of high temperature on the unwelded area.

[0111] Optional, such as Figure 5 As shown, the spacer 20 further includes a third matching portion 23, the third matching portion 23 is opposite to the collecting plate 10, and the third matching portion 23 matches with the first matching portion or the second matching portion for positioning and limiting.

[0112] Optionally, the third matching portion 23 and the support portion 22 may be an integrated structure, that is, the third matching portion 23 and the support portion 22 are an integrated structure made by an integrated molding process, and the integrated molding process may be stamping, casting, etc., without limitation. The third matching portion 23 and the support portion 22 may also be a split structure, and the third matching portion 23 and the support portion 22 may be connected and fixed by welding, bonding, clamping, screwing, etc.

[0113] Optionally, the shape of the third matching portion 23 can be block-shaped, cylindrical, prism-shaped, etc., without specific limitation.

[0114] Optionally, the number of the third matching parts 23 can be one, two, three, six, etc., as long as at least one supporting part 22 is connected to the third matching part 23, and there is no specific limitation.

[0115] Optional, such as Figure 1 , Figure 2 , Figure 3 and Figure 5As shown, when the second welding area 12 is welded, the third matching portion 23 is received in the first limiting groove 111, and when the first welding area 11 is welded, the third matching portion 23 is received in the second limiting groove 121. The third matching portion 23 is received in the first limiting groove 111 or the second limiting groove 121 to fix the position of the spacer 20 and prevent the spacer 20 from rotating; when the spacer 20 rotates from the first position to the second position, the third matching portion 23 rotates relative to the collecting plate 10 along with the spacer 20.

[0116] Optionally, the shape of the third matching portion 23 may correspond to the first limiting groove 111 and the second limiting groove 121 , and no specific limitation is made.

[0117] By setting the spacer 20 to also include a third matching portion 23, the third matching portion 23 is connected to the side of the support portion 22 facing the collecting plate 10. The third matching portion 23 cooperates with the collecting plate 10 to limit the position of the spacer 20 during welding to prevent the spacer 20 from rotating. At the same time, it also plays a positioning role for the spacer 20 to prevent the spacer 20 from excessive rotation when rotating relative to the collecting plate 10, thereby ensuring assembly stability.

[0118] Optional, such as Figure 6 and Figure 8 As shown, the cover plate assembly 100 further includes a pole 30 , which is coaxially connected to the collecting plate 10 , and a connecting hole 211 is provided in the main body 21 , which is matched and connected to one end of the pole 30 .

[0119] Optionally, the material of the pole 30 may be copper, aluminum, etc., such as 1060 aluminum, without specific limitation.

[0120] Optionally, the pole 30 is coaxially connected and fixed to the collecting plate 10 , and the connection method may be welding, bonding, clamping, screwing, etc., which is not specifically limited.

[0121] Optionally, the pole 30 includes a column 31 and a pole flange 32 , the pole flange 32 is coaxially connected to the column 31 , the pole flange 32 is located at one end of the column 31 close to the current collecting disk 10 and the pole flange 32 protrudes from the outer peripheral surface of the column 31 .

[0122] Optional, such as Figure 3 and Figure 6 As shown, the main body 21 of the spacer 20 is provided with a connecting hole 211 , and the connecting hole 211 is rotatably connected to the pole flange 32 .

[0123] The cover plate assembly 100 also includes a pole 30, which is coaxially connected to the collecting plate 10. The main body 21 is provided with a connecting hole 211, which is matched and connected with one end of the pole 30, so that the spacer 20 can rotate relative to the collecting plate 10. The collecting plate 10 is respectively welded to the pole ear and the pole 30, so that the current can be effectively extracted.

[0124] Optionally, the pole flange 32 of the pole 30 includes a first limiting portion 33, and the spacer 20 also includes a second limiting portion 24, the second limiting portion 24 is connected to the side of the main body 21 facing the pole 30, and the first limiting portion 33 is cooperatively connected with the second limiting portion 24.

[0125] Optionally, the first limiting portion 33 includes a sliding groove, the second limiting portion 24 is a slider, and the first limiting portion 33 and the second limiting portion 24 are cooperatively connected; or, the first limiting portion 33 is a slider, the second limiting portion 24 is a sliding groove, and the first limiting portion 33 and the second limiting portion 24 are cooperatively connected. All of the above methods are possible and are not specifically limited.

[0126] For example, Figure 4 and Figure 7 As shown, the first limiting portion 33 is a sliding groove, and the second limiting portion 24 is a sliding block. The sliding block is received in the sliding groove and slides relative to the sliding groove when the spacer 20 rotates.

[0127] Optionally, the slider and the main body 21 may be an integrated structure or a split structure, and the slider and the main body 21 are connected and fixed by welding, bonding, clamping, screwing, etc.

[0128] By setting a first limiting portion 33 connected to the pole 30, the spacer 20 also includes a second limiting portion 24, the second limiting portion 24 is connected to the side of the main body 21 facing the pole 30, the first limiting portion 33 is cooperatively connected with the second limiting portion 24, and during the rotation of the spacer 20, the slider is always in the sliding groove to limit the rotation angle of the spacer 20.

[0129] Optionally, the limiting designs of the spacer 20, the collecting plate 10, and the pole 30 may be based on the size of the spacer 20 and the assembly and debugging results.

[0130] Optionally, the rotation angle α of the spacer 20 satisfies: 30°≤α≤180°; the number of the third matching parts 23 can be 2, 3, 6, etc.; the number of the sliders can be 2, 3, 4, 6, etc., without specific limitation.

[0131] Optionally, the cover plate assembly 100 further includes a metal block 50 , an insulating member 60 , a cover plate 70 and a sealing ring 40 .

[0132] Optional, such as Figure 8 and Fig. 9 As shown, the metal block 50, the insulating member 60, the cover plate 70, the spacer 20, and the current collecting plate 10 are stacked in sequence along the direction of the first axis of the current collecting plate 10, and the end of the pole 30 away from the connecting hole 211 is sequentially penetrated through the current collecting plate 10, the spacer 20, the sealing ring 40, the cover plate 70, the insulating member 60 and the metal block 50, and is conductively connected to the metal block 50. The connection method can be welding, bonding, clamping, screwing, etc., without limitation.

[0133] Optionally, the metal block 50 may be an aluminum block or the like, without any specific limitation.

[0134] Optionally, the pole 30 and the current collecting plate 10 are connected to form a whole by torque welding or penetration welding. The cover plate 70 is connected to the cover plate by welding, bonding, clamping, screwing, etc., which are not specifically limited.

[0135] Optionally, the pole flange 32 and the cover plate 70 are compressed by the sealing ring 40 to achieve internal and external insulation and sealing.

[0136] During the assembly and manufacturing process of cylindrical batteries, the pole pieces are wound and flattened to form a battery cell, and the cover plate assembly is placed on the positive pole ear side or the negative pole ear side of the battery cell. During the first welding, the third matching portion 23 is located in the first limiting groove 111, the support portion 22 blocks the first welding area, and the second welding area of ​​the current collector 10 is welded to the pole ear. Figure 1 After the first welding is completed, the spacer 20 is rotated clockwise by the clamping tool, and the third matching portion 23 moves from the first limiting groove 111 to the second limiting groove 121; at the same time, the supporting portion 22 of the spacer 20 blocks the second welding area, exposing the first welding area, as shown in FIG. Figure 2 As shown, the first welding area can be welded to the tab, which significantly increases the weldable area.

[0137] After the welding on this side is completed, the current collecting plate 10 and the pole ear on the other side of the battery cell can be welded. Finally, after the processes of film coating, shelling, final welding, etc., the battery assembly is completed.

[0138] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship of terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inside" and "outside" are based on the orientation or positional relationship described in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0139] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.

Claims

1. A collecting plate, characterized in that: The collecting plate is used for a cover plate assembly, and the collecting plate comprises: The welding portion includes a first welding area and a second welding area sequentially arranged in a circumferential direction of the collecting plate; A first matching portion, corresponding to the first welding area and adapted to match with the supporting portion of the spacer to expose the second welding area; The second matching portion corresponds to the second welding area and is suitable for matching with the supporting portion of the spacer to expose the first welding area.

2. The collecting plate according to claim 1, characterized in that: The collecting plate includes a first surface and a second surface facing each other, the first matching portion includes a first limiting groove extending from the first surface to the second surface, and the second matching portion includes a second limiting groove extending from the first surface to the second surface.

3. The collecting plate according to claim 2, characterized in that: The first limiting groove includes a first side surface and a second side surface opposite to each other in the circumferential direction of the collecting plate, the second side surface is close to the second matching portion, the first matching portion also has a first guide surface, and the first guide surface connects the first surface and the second side surface; and / or, the second limiting groove includes a third side surface and a fourth side surface opposite to each other in the circumferential direction of the collecting plate, the third side surface is close to the first matching portion, the second matching portion also has a second guide surface, and the second guide surface connects the first surface and the third side surface.

4. The collecting plate according to claim 2, characterized in that: The first matching portion further has a first guide surface, which is a side wall surface of the first limiting groove close to the second matching portion, and the first guide surface connects the first surface and the second surface.

5. The collecting plate according to any one of claims 1 to 4, characterized in that: The first matching portion is closer to the outer periphery of the current collecting plate than the first welding area, or the first matching portion is closer to the inner periphery of the current collecting plate than the first welding area; and / or, The second matching portion is closer to the outer circumference of the current collecting plate than the second welding region, or the second matching portion is closer to the inner circumference of the current collecting plate than the second welding region.

6. The collector plate according to any one of claims 1 to 4, characterized in that: There are multiple welding parts, and the multiple welding parts are arranged at intervals along the circumferential direction of the collecting plate.

7. A cover plate assembly, characterized in that: It comprises a spacer and a current collecting plate as claimed in any one of claims 1 to 6, wherein the current collecting plate has a first axis, the spacer is coaxially arranged with the current collecting plate, the spacer is suitable for rotating around the first axis and exposing the first welding area or the second welding area in the direction of the first axis.

8. The cover plate assembly according to claim 7, characterized in that: The spacer includes a main body and a supporting portion, the main body is coaxially arranged with the collecting plate, the first welding area and the second welding area are located on one side of the outer periphery of the main body, the supporting portion is connected to the outer periphery of the main body, and the supporting portion cooperates with the first matching portion or the second matching portion to expose the first welding area or the second welding area in the direction of the first axis.

9. The cover plate assembly according to claim 8, characterized in that: The supporting portion includes a third matching portion, the third matching portion is opposite to the current collecting plate, and the third matching portion matches with the first matching portion or the second matching portion for positioning and limiting.

10. The cover plate assembly according to claim 8, characterized in that: The cover plate assembly further comprises a pole, which is coaxially connected to the current collecting plate. The main body is provided with a connecting hole, which is matched and connected to one end of the pole.

11. The cover plate assembly according to claim 10, characterized in that: The pole includes a first limiting portion, and the spacer further includes a second limiting portion, the second limiting portion is connected to a side of the main body facing the pole, and the first limiting portion is cooperatively connected with the second limiting portion.

12. The cover plate assembly according to claim 11, characterized in that: The first limiting portion includes a sliding groove, and the second limiting portion is a sliding block. The sliding block is suitable for being received in the sliding groove and sliding relative to the inner wall of the sliding groove.

13. The cover plate assembly according to claim 10, characterized in that: The cover plate assembly also includes a sealing ring, a metal block, an insulating member and a cover plate, wherein the metal block, the insulating member, the cover plate, the spacer, and the current collecting plate are sequentially stacked along the direction of the first axis, and the other end of the pole away from the connecting hole is sequentially penetrated through the current collecting plate, the spacer, the sealing ring, the cover plate, the insulating member and the metal block and is conductively connected to the metal block.

14. A cylindrical battery, characterized in that: It comprises a shell, a battery cell and a cover plate assembly as described in any one of claims 7 to 13, wherein the battery cell is accommodated in the shell, and the cover plate assembly is covered on the opening of the shell; the first welding area of ​​the collector plate is welded to a part of the pole tab of the battery cell to form a first weld mark, and the second welding area of ​​the collector plate is welded to a part of the pole tab of the battery cell to form a second weld mark.

15. A battery device, characterized in that: It comprises a box body and the cylindrical battery as claimed in claim 14, wherein the cylindrical battery is arranged in the box body.

16. An electrical equipment, characterized in that: Comprising the cylindrical battery as claimed in claim 14 or the battery device as claimed in claim 15.

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