Collector plate assembly, battery, battery device and electric equipment

Abstract

The invention provides a collector plate assembly, a battery, a battery device and electric equipment, and relates to the technical field of batteries. The collector plate assembly comprises a plate body and a fuse element, wherein the plate body is suitable for being connected with a battery cell; the fuse element is connected with the disc body and comprises a first connecting part, and the first connecting part is suitable for being connected with a cover plate of a battery; and the orthographic projection of at least part of the first connecting part on the disc body is overlapped with the disc body. According to the invention, pseudo soldering between the fuse element and the cover plate can be prevented, the electrical connection stability between the collector plate assembly and the cover plate is improved, and the yield of the battery is increased.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of battery technology, and in particular to a collecting plate assembly, a battery, a battery device, and an electrical equipment. Background Art

[0002] In the related art, in order to realize the electrical connection between the pole core and the cover plate, a current collecting plate is usually arranged between the pole core and the cover plate to realize the electrical connection between the cover plate and the current collector. The current collecting plate usually includes a fuse. When a short circuit occurs in the battery, the fuse melts, so that the battery can cut off the circuit by itself, thereby improving the safety of the battery.

[0003] However, a cold weld is easily generated between the fuse and the cover plate, resulting in an unstable electrical connection between the collector plate and the cover plate and reducing the yield of the battery. Summary of the invention

[0004] In view of the above problems, the embodiments of the present application provide a collecting plate assembly, a battery, a battery device and an electrical equipment to prevent cold welding between the fuse and the cover plate, thereby improving the electrical connection stability between the collecting plate assembly and the cover plate, and the yield of the battery.

[0005] In order to achieve the above objectives, the embodiments of the present application provide the following technical solutions:

[0006] A first aspect of an embodiment of the present application provides a current collecting plate assembly, comprising:

[0007] A disc body, the disc body being adapted to be electrically connected to the pole core;

[0008] A fuse, the fuse being connected to the disk body, wherein the fuse comprises a first connection portion, the first connection portion being suitable for connecting to a cover plate of a battery;

[0009] In the thickness direction of the disk body, at least a portion of the orthographic projection of the first connecting portion overlaps with the orthographic projection of the disk body.

[0010] In a possible implementation manner, in the thickness direction of the disk body, the orthographic projection of the first connecting portion is located within the orthographic projection of the disk body.

[0011] In a possible implementation manner, the center of the first connecting portion coincides with the center of the disk body.

[0012] In a possible implementation, the fuse further includes a second connecting portion and a fuse portion, and the second connecting portion is connected to the disk body;

[0013] One end of the fuse part is connected to the second connection part, and the other end of the fuse part is connected to the first connection part.

[0014] In a possible implementation, a flow area of ​​the second connecting portion is larger than a flow area of ​​the fuse portion.

[0015] In a possible implementation, a section perpendicular to the disk body is taken as a longitudinal section; the longitudinal section area of ​​the fuse portion is smaller than the longitudinal section area of ​​the second connecting portion;

[0016] And / or, the longitudinal cross-sectional area of ​​the fuse portion is smaller than the longitudinal cross-sectional area of ​​the first connecting portion.

[0017] In a possible implementation manner, the fuse further includes a stress buffering portion, and the stress buffering portion is disposed on the fuse portion.

[0018] In a possible implementation manner, the stress buffering portion includes a plurality of buffering protrusions connected to each other.

[0019] In a possible implementation manner, the protruding directions of any two adjacent buffer protrusions are opposite.

[0020] In a possible implementation manner, a protruding direction of the buffer protrusion is parallel to a thickness direction of the fuse portion; or, a protruding direction of the buffer protrusion is perpendicular to the thickness direction of the fuse portion.

[0021] In a possible implementation manner, the stress buffer portion includes a stress buffer layer, and the stress buffer layer covers the fuse portion.

[0022] In a possible implementation, the fuse part and the first connecting part and the second connecting part are all separately provided, and the fuse part is a fuse.

[0023] In a possible implementation, the fuse portion includes at least two sub-fuse portions that are spaced apart from each other;

[0024] Each of the sub-fuse parts is used to connect the first connection part and the second connection part.

[0025] In a possible implementation manner, the fuse part is provided with at least one partition hole, and the at least one partition hole divides the fuse part into at least two sub-fuse parts.

[0026] In a possible implementation, the fuse portion includes a plurality of fuse portions, and the plurality of fuse portions are arranged at intervals along the circumference of the first connecting portion.

[0027] In a possible implementation, the second connection portion includes at least one, and a plurality of the fuse portions are connected to the disk body via at least one second connection portion.

[0028] In a possible implementation, the disk body is provided with a first through hole, the fuse is provided with a second through hole, and the first through hole and the second through hole at least partially overlap.

[0029] In a possible implementation manner, the second through hole is disposed at the first connecting portion, and an axis of the second through hole coincides with an axis of the first through hole.

[0030] In a possible implementation, the collecting disc assembly further includes an insulating member, and the insulating member is at least disposed between the disc body and the fuse.

[0031] In a possible implementation, the insulating member is provided with a third through hole, the third through hole at least partially overlaps with the first through hole, and the third through hole at least partially overlaps with the second through hole, so that the first through hole and the second through hole are connected.

[0032] In a possible implementation manner, an area of ​​the second through hole is greater than or equal to an area of ​​the third through hole;

[0033] And / or, the area of ​​the third through hole is greater than or equal to the area of ​​the first through hole.

[0034] In a possible implementation manner, the disk body is provided with at least one third connection portion, and at least one of the third connection portions is suitable for being connected to the pole core.

[0035] In a possible implementation, the fuse and the disk body are provided separately.

[0036] A second aspect of an embodiment of the present application provides a battery, comprising:

[0037] A housing having an opening formed in the housing;

[0038] A pole core, wherein the pole core is arranged in the accommodating cavity;

[0039] a cover plate, the cover plate being connected to the housing and covering the opening;

[0040] The current collecting plate assembly described in the first aspect is arranged between the pole core and the cover plate, and is respectively connected to the pole core and the cover plate.

[0041] A third aspect of the embodiments of the present application provides a battery device, comprising the battery described in the second aspect.

[0042] A fourth aspect of the embodiments of the present application provides an electric device, comprising an electric device and the battery according to the second aspect, wherein the battery is connected to the electric device and is used to provide electric energy to the electric device;

[0043] Alternatively, it comprises an electric device and the battery device described in the third aspect, wherein the battery device is connected to the electric device to provide electrical energy to the electric device.

[0044] In the current collecting disc assembly, battery, battery device and electrical equipment provided by the embodiments of the present application, the fuse includes a first connection portion, and the first connection portion is suitable for connecting to the cover plate of the battery; wherein, in the thickness direction of the disc body, at least part of the orthographic projection of the first connection portion of the fuse overlaps with the orthographic projection of the disc body, that is, the disc body provides support for at least part of the first connection portion, so that the gap formed between the first connection portion of the fuse and the cover plate can be reduced or even avoided, and the formation of a cold weld between the first connection portion of the fuse and the cover plate can be prevented, thereby improving the yield of the battery. In addition, there is no cold weld between the current collecting disc assembly and the cover plate, which can make the fuse and the disc body tightly connected, and the fuse and the cover plate tightly connected, thereby ensuring that the entire current collecting disc assembly is more stable in electrical connection and ensuring the effective transmission of current.

[0045] In addition to the technical problems solved by the embodiments of the present application described above, the technical features that constitute the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions, other technical problems that can be solved by the collecting plate assembly, battery, battery device and electrical equipment provided by the embodiments of the present application, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further described in detail in the specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0047] Figure 1 A schematic diagram of the structure of the current collecting plate assembly provided in an embodiment of the present application;

[0048] Figure 2 Schematic diagram of the fuse provided in the embodiment of the present application Figure 1 ;

[0049] Figure 3 Schematic diagram of the fuse provided in the embodiment of the present application Figure 2 ;

[0050] Figure 4 Schematic diagram of the fuse provided in the embodiment of the present application Figure 3 ;

[0051] Figure 5A partial schematic diagram of a battery provided in an embodiment of the present application.

[0052] Description of reference numerals:

[0053] 1000: battery;

[0054] 100: current collecting plate assembly;

[0055] 110: disk body; 111: first through hole; 112: third connection part; 1121: first sub-connection part; 1122: second sub-connection part;

[0056] 120: fuse; 121: first connection portion; 122: second connection portion; 123: fuse portion; 1231: sub-fuse portion; 1232: separation hole; 124: stress buffer portion; 125: second through hole;

[0057] 130: insulating member; 131: third through hole;

[0058] 200: housing; 210: receiving chamber;

[0059] 300: core;

[0060] 400: Cover plate. DETAILED DESCRIPTION

[0061] As described in the background technology, there is a problem of cold welding between the current collecting plate and the cover plate in the related technology. The inventors have found that the reason for this problem is that the area where the current collecting plate and the cover plate are connected is usually in a suspended state. Due to the influence of gravity or other factors, there will be a certain distance between the current collecting plate and the cover plate, which makes it easy for cold welding to occur between the current collecting plate and the cover plate, thereby causing unstable electrical connection between the current collecting plate and the cover plate, and reducing the yield of the battery.

[0062] In response to the above technical problems, the embodiments of the present application provide a current collecting disc assembly, a battery, a battery device and an electrical device, wherein the fuse includes a first connecting portion, which is suitable for connecting to the cover plate of the battery; wherein at least part of the orthographic projection of the first connecting portion of the fuse on the disc body overlaps with the disc body, that is, the disc body at least provides support for the first connecting portion of the fuse, so that the gap formed between the first connecting portion of the fuse and the cover plate can be reduced or even avoided, and the formation of a cold weld between the fuse and the cover plate can be prevented, thereby improving the yield of the battery. In addition, there is no cold weld between the current collecting disc assembly and the cover plate, which can make the fuse and the disc body tightly connected, and the fuse and the cover plate tightly connected, so that the entire current collecting disc assembly is more stable in electrical connection, ensuring the effective transmission of current.

[0063] In order to make the above-mentioned purposes, features and advantages of the embodiments of the present application more obvious and understandable, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of this application.

[0064] Please refer to the attached Figure 1 To Attachment Figure 4 The present invention provides a current collecting plate assembly 100, which is used as a connecting bridge to connect the cover plate 400 and the pole core 300 (please refer to the attached Figure 5 ) to achieve electrical connection between the conductive component of the cover plate 400 and the pole core 300. For example, one end of the current collecting plate assembly 100 can be connected to the pole arranged on the cover plate 400, and the other end can be connected to the pole ear of the pole core 300 to achieve electrical connection between the pole ear and the pole.

[0065] Please continue to refer to the attached Figure 1 and attached Figure 5 , the current collecting disc assembly 100 includes a disc body 110, and the disc body 110 is suitable for being electrically connected to the pole core 300. It should be noted that when the pole core 300 includes a pole ear, the disc body 110 is suitable for being electrically connected to the pole ear of the pole core 300. Among them, the shape of the disc body 110 can be freely set according to the shape of the battery 1000. Exemplarily, in this embodiment, the battery 1000 is a cylindrical battery, and accordingly, the disc body 110 is a circular disc body, so that the shape of the disc body 110 can be adapted to the shape of the pole core 300 and the cover plate 400, so as to reduce the difficulty of connecting the disc body 110 with the pole core 300 and the cover plate 400, while also ensuring the connection quality.

[0066] The following embodiments are described by taking the disk body 110 as a circular shape as an example.

[0067] The collecting disk assembly 100 also includes a fuse 120, which is connected to the disk body 110. In the present embodiment, the fuse 120 is connected to the disk body 110, which can be understood as the fuse 120 and the disk body 110 being an integral part. This can simplify the preparation process of the collecting disk assembly 100 and also has the advantages of high structural strength and high stability.

[0068] The fuse 120 is connected to the disk body 110, which can also be understood as the fuse 120 and the disk body 110 are separately arranged. In other words, the fuse 120 and the disk body 110 are two independent parts, and the fuse 120 can be fixedly connected to the disk body 110 by a conventional fixing method, for example, the fuse 120 can be connected to the disk body 110 by welding. In this way, the connection position of the fuse 120 and the disk body 110 can be reasonably adjusted according to actual needs.

[0069] The fuse 120 may be made of a conductive material that can be melted under a certain amount of heat. For example, the fuse 120 may include but is not limited to a fuse. When the battery fails thermally or short-circuits, the fuse melts, and the electrical connection between the pole core 300 and the cover plate 400 is cut off, thereby improving the safety of the battery.

[0070] The fuse 120 includes a first connection portion 121, which is suitable for connecting to the cover plate 400 of the battery 1000. In the thickness direction of the disk body 110, at least part of the orthographic projection of the first connection portion 121 overlaps with the orthographic projection of the disk body 110. In one example, in the thickness direction of the disk body 110, part of the orthographic projection of the first connection portion 121 overlaps with the orthographic projection of the disk body 110. In other words, the orthographic projection of part of the first connection portion 121 on the plane where the disk body 110 is located overlaps with the disk body 110. In other words, the orthographic projection of part of the first connection portion 121 falls on the disk body 110, and the orthographic projection of part of the first connection portion 121 does not fall on the disk body 110. In another example, in the thickness direction of the disk body 110, the orthographic projection of the first connection portion 121 is located within the orthographic projection of the disk body 110.

[0071] In this way, the disc body 110 can provide support for at least part of the first connection portion 121, and such support can reduce the downward displacement of the first connection portion 121 of the fuse 120 due to gravity or other factors, thereby reducing or even avoiding the gap formed between the first connection portion of the fuse 120 and the cover plate 400, thereby preventing the formation of a cold weld between the fuse 120 and the cover plate 400, thereby improving the yield of the battery. In addition, there is no cold weld between the current collecting disc assembly 100 and the cover plate 400, which can make the fuse 120 fit tightly with the disc body 110, and the fuse 120 and the cover plate 400 are firmly connected, thereby ensuring that the entire current collecting disc assembly 100 is more stable in electrical connection and ensuring effective transmission of current.

[0072] It should be noted that other factors involved in this embodiment may also be that the size deviation of the fuse 120 or the deformation of the fuse 120 causes a gap to be formed between the first connection portion 121 of the fuse 120 and the cover plate 400 .

[0073] In this example, the fuse 120 and the disk body 110, the fuse 120 and the cover plate 400, and the disk body 110 and the pole ear of the pole core can be connected by welding. For example, laser welding or ultrasonic welding can be used to achieve the connection between the fuse 120 and the disk body 110, the connection between the fuse 120 and the pole of the cover plate 400, and the connection between the disk body 110 and the pole ear of the pole core.

[0074] In a possible implementation, when the orthographic projection of the first connection portion 121 is located within the orthographic projection of the disk body 110, the center of the first connection portion 121 may or may not coincide with the center of the disk body 110. Exemplarily, the center of the first connection portion 121 coincides with the center of the disk body 110. This design enables the current to be more evenly distributed on the current collecting disk assembly 100, reduces the risk of current concentration and heat accumulation, and thus improves the performance and safety of the battery.

[0075] It should be noted that the center of the first connection portion 121 may refer to the geometric center of the first connection portion 121, or a point adjacent to the geometric center of the first connection portion 121. The geometric center may be the centroid or center point of the first connection portion 121.

[0076] Exemplarily, the shape of the first connection portion 121 is circular, and the center of the corresponding first connection portion 121 may be the center of the circle of the first connection portion 121. When the shape of the first connection portion 121 is circular, it can better match the cylindrical cover plate 400, thereby improving the connection stability between the first connection portion 121 and the cover plate 400.

[0077] Please refer to the attached Figure 2 To Attachment Figure 4 The fuse 120 provided in the embodiment of the present application further includes a second connection portion 122 and a fuse portion 123, and the second connection portion 122 is connected to the disk body 110. For example, the second connection portion 122 is welded to the disk body 110, wherein all the second connection portions 122 are welded to the disk body 110 to improve the structural strength of the fuse 120 and the disk body 110.

[0078] One end of the fuse 123 is connected to the second connection part 122, and the other end of the fuse 123 is connected to the first connection part 121. In this way, the fuse 120 can connect the disk body 110 and the cover plate, thereby realizing the connection between the cover plate and the pole lug of the pole core. When a short circuit occurs in the battery, the fuse 120 melts, and the electrical connection between the pole core 300 and the cover plate 400 can be cut off, thereby improving the safety of the battery.

[0079] In the example of the present application, the flow area of ​​the second connection portion 122 is greater than the flow area of ​​the fuse portion 123, so that the fuse portion 123 is preferentially blown. In this way, when an abnormality occurs in the internal or external circuit of the battery 1000, the current can be quickly cut off to prevent the fault from further expanding, which helps to improve the safety of the battery 1000. It should be noted that the flow area can be the cross-sectional area of ​​the current passing through a certain conductive component.

[0080] In a possible implementation, taking the section perpendicular to the disk body 110 as the longitudinal section, the longitudinal section area of ​​the fuse part 123 is smaller than the longitudinal section area of ​​the second connection part 122; and / or, the longitudinal section area of ​​the fuse part 123 is smaller than the longitudinal section area of ​​the first connection part 121. In this way, the longitudinal section area of ​​the fuse part 123 can be minimized; when a large current passes through the fuse 120, the fuse part 123 is melted first, thereby improving the safety performance of the battery 1000.

[0081] As an example, in the first direction, the fuse part 123 protrudes from at least one side of the second connection part 122, so that the shape of the fuse part 123 and the second connection part 122 is L-shaped, or the shape of the fuse part 123 and the second connection part 122 is T-shaped.

[0082] It should be noted that the attached Figure 2 As an example, the first direction is the Figure 2 In other words, the first connection portion 121 and the second connection portion 122 have a vertical connection line, and the first direction is perpendicular to the vertical connection line.

[0083] In this way, the longitudinal cross-sectional area of ​​the fuse part 123 is minimized. When thermal failure or abnormal current occurs in the battery 1000, the fuse part 123 can respond quickly and melt, so that the first connection part 121 and the second connection part 122 are quickly disconnected, thereby achieving electrical disconnection between the pole core 300 and the cover plate 400.

[0084] At the same time, the longitudinal cross-sectional areas of the first connection part 121 and the second connection part 122 are relatively large, which can increase the contact area between the first connection part 121 and the cover plate 400, and the release area between the second connection part 122 and the disk body 110, thereby improving the structural strength of the collecting disk assembly 100 itself, as well as the structural strength of the collecting disk assembly 100 and the cover plate 400, which helps to prevent the connection from loosening or disconnecting during daily use and vibration environments, and ensure the long-term stable operation of the battery system.

[0085] In a possible implementation, the fuse 120 further includes a stress buffer 124, which is disposed on the fuse 123. The stress buffer 124 can buffer the vibration that may be generated in the battery working scene, reducing the risk of loose connection or breakage of the fuse 120 caused by external factors such as vibration and impact.

[0086] Please refer to the attached Figure 3 As a possible implementation of the stress buffer portion 124, the stress buffer portion 124 includes a plurality of buffer protrusions, and the plurality of buffer protrusions are connected to each other. The protruding directions of the plurality of buffer protrusions may be the same or different, or the protruding directions of some of the buffer protrusions are the same, and the protruding directions of the remaining buffer protrusions are different.

[0087] In one example, any two adjacent buffer protrusions protrude in the same direction, so that the shape of the stress buffer portion 124 is similar to a mountain peak. In another example, any two adjacent buffer protrusions protrude in opposite directions, so that the shape of the stress buffer portion 124 is wavy. In this way, the impact force can be dispersed more effectively when impacted, and the wavy profile disperses the impact force in multiple directions, reducing local stress concentration, thereby reducing the risk of damage to the fuse portion 123 due to impact.

[0088] In addition, whether the stress buffering portion 124 is peak-shaped or wave-shaped, the stability and rigidity of the overall structure are enhanced by interconnecting multiple buffering protrusions. This design helps prevent loosening or breaking of the connection under vibration and impact conditions, thereby improving the reliability of the fuse 120.

[0089] It should be noted that there are many options for the protruding direction of the buffer protrusion relative to the fuse part 123. For example, the protruding direction of the buffer protrusion is parallel to the thickness direction of the fuse part 123, and its structure is as follows: Figure 3 As shown. For another example, the protruding direction of the buffer protrusion is perpendicular to the thickness direction of the fuse part 123. In other words, the protruding direction of the buffer protrusion extends along the horizontal plane. The multiple protruding direction options of the buffer protrusion allow the design to flexibly adapt to different application scenarios and needs. For example, in situations where higher structural strength is required, a design parallel to the thickness direction of the fuse part can be selected; and in situations where a more uniform fusing effect is required, a design extending along the horizontal plane can be selected.

[0090] The structure of the stress buffer portion 124 is not limited to a plurality of buffer protrusions, and other methods are also possible. As a possible implementation, a material with high elasticity (such as rubber, silicone or other elastic polymers) can be used to cover at least one surface of the fuse portion 123 to form a stress buffer layer. Such a material can effectively absorb and disperse vibration energy and reduce the impact on the fuse portion 123.

[0091] As a possible implementation manner, the fuse part 123 and the first connection part 121 and the second connection part 122 are all separately arranged, that is, the fuse part 123, the first connection part 121 and the second connection part 122 are three relatively independent components. In this way, the structure of the fuse part 123 can be freely set. For example, the fuse part 123 is a fuse. In this way, the fuse part 123 itself constitutes a stress buffer part.

[0092] In this way, the fuse part 123 itself effectively absorbs and disperses stress during the fusing process, thereby reducing the impact on the surrounding circuits and components. In addition, the structure of the entire fuse 120 can be simplified, which facilitates the preparation of the fuse 120.

[0093] Please refer to the attached Figure 4 In a possible implementation, the fuse portion 123 includes at least two sub-fuse portions 1231 that are spaced apart from each other. Each sub-fuse portion 1231 is used to connect the first connection portion 121 and the second connection portion 122 .

[0094] In this way, the size of each sub-fuse part 1231 can be reduced as much as possible. A smaller fuse part size means that under the same current overload condition, the sub-fuse part 1231 can reach the fusing temperature faster, thereby disconnecting the circuit faster and improving the fusing response speed.

[0095] It should be understood that each sub-fuse portion 1231 may be relatively independent, or may be connected in parallel with each other and then connected to the first connection portion 121 and the second connection portion 122 respectively.

[0096] For example, please refer to the attached Figure 4 , the fuse part 123 is provided with at least one partition hole 1232, and the at least one partition hole 1232 divides the fuse part 123 into at least two sub-fuses 1231. For example, the fuse part 123 is provided with one partition hole 1232, and one partition hole 1232 divides the fuse part 123 into two sub-fuses 1231; after one end of the two sub-fuses 1231 is connected together, they are connected to the first connection part 121, and after the other ends of the two sub-fuses 1231 are connected together, they are connected to the second connection part 122.

[0097] The presence of the separation holes 1232 reduces the cross-sectional area of ​​each sub-fuse portion 1231, so that under the same current overload condition, the sub-fuse portion 1231 can reach the temperature required for fusing more quickly, achieve faster circuit disconnection, and enhance the fusing efficiency.

[0098] It should be noted that at least one partition hole 1232 and the buffer portion 124 may be provided on the fuse portion 123 at the same time, or other options may be provided. For example, the fuse portion 123 may only have the buffer portion 124 or only have at least one partition hole 1232 .

[0099] In this embodiment, the number of fuse parts 123 can be one or more. Figure 4 The fuse part 123 includes a plurality of fuse parts 123, which are arranged at intervals along the circumference of the first connection part 121. By arranging the plurality of fuse parts 123 at intervals along the circumference of the first connection part 121, the current can be dispersed more effectively, the concentration of the current on a single fuse part 123 can be reduced, and the risk of a single fuse part 123 being blown prematurely due to excessive current can be avoided. In addition, the design of the plurality of fuse parts 123 provides additional safety redundancy for the battery. Even if one of the fuse parts 123 fails to work properly for some reason, the other fuse parts can still continue to take on the task of cutting off the current, ensuring that the safety performance of the battery is not affected.

[0100] It should be noted that when there are multiple fuse parts 123, there are multiple options for the number of second connection parts 122. Exemplarily, the second connection part 122 includes at least one, and the multiple fuse parts 123 are connected to the disk body 110 through at least one second connection part 122. In other words, when the number of the second connection part 122 is one, the multiple fuse parts 123 are connected to the disk body 110 through one second connection part 122. When the number of the second connection parts 122 is at least two, several fuse parts 123 are connected to the disk body 110 through one of the second connection parts 122. As for the number of several fuse parts 123, it can be freely selected according to actual conditions.

[0101] In this embodiment, by selecting a suitable number of second connection parts 122, the path of the current between the fuse part 123 and the disk body 110 can be optimized. For example, when a plurality of second connection parts 122 are used, the current distribution can be made more uniform, and the current pressure of a single second connection part 122 can be reduced, thereby improving the reliability and safety of the battery 1000.

[0102] Please continue to refer to the attached Figure 1 In a possible implementation, the disk body 110 is provided with a first through hole 111, and the fuse 120 is provided with a second through hole 125, and the first through hole 111 and the second through hole 125 at least partially overlap.

[0103] That is, the first through hole 111 and the second through hole 125 may partially overlap or completely overlap. In this way, the first through hole 111 and the second through hole 125 can be connected to the injection hole of the cover plate 400, so that the electrolyte can be injected into the housing 200 through the injection hole, the first through hole 111 and the second through hole 125, thereby ensuring the normal operation of the battery 1000.

[0104] The second through hole 125 may be provided in at least one of the first connection portion 121 and the second connection portion 122. Exemplarily, the second through hole 125 is provided in the first connection portion 121, and the axis of the second through hole 125 coincides with the axis of the first through hole 111. In this way, the overlapping area of ​​the first through hole 111 and the second through hole 125 can be increased, thereby helping to speed up the flow rate of the electrolyte, improve the injection efficiency, and reduce the waste of the electrolyte during the injection process.

[0105] It should be noted that the first through hole 111 and the second through hole 125 can be used as exhaust holes in addition to being used as liquid injection holes.

[0106] In a possible implementation, the collecting disc assembly 100 further includes an insulating member 130 , and the insulating member 130 is at least disposed between the disc body 110 and the fuse 120 .

[0107] Since the fuse 120 will fall off onto the disk 110 when it is blown, it can easily connect to nearby metals, which may cause the circuit to be turned on again. Therefore, in this embodiment, the insulating member 130 is at least arranged between the disk 110 and the fuse 120. The arrangement of the insulating member 130 effectively isolates the direct contact between the fuse 120 and the disk 110 or other metal parts, preventing the circuit from being turned on again after the fuse is blown. The material of the insulating member 130 may include rubber or other insulating substances.

[0108] It should be noted that the insulating member 130 may not be provided between the disk body 110 and the fuse 120. The reason is that the contact resistance of the non-electrically connected part between the fuse 120 and the disk body 110 is relatively large, which can also play a role in current limiting. Therefore, for some use scenarios with lower requirements or strict cost control, the design without the insulating member 130 can also meet the use requirements. However, when the insulating member 130 is provided between the disk body 110 and the fuse 120, after the fuse part 123 is melted under a large current, the liquid metal bead is not easy to combine with the disk body 110 part again, thereby reducing the contact resistance again. Therefore, preferably, the insulating member 130 is provided between the disk body 110 and the fuse 120.

[0109] Please continue to refer to the attached Figure 1The insulating member 130 is provided with a third through hole 131, and the third through hole 131 at least partially overlaps with the first through hole 111, and the third through hole 131 at least partially overlaps with the second through hole 125, so that the first through hole 111 is connected to the second through hole 125. Exemplarily, the axis of the first through hole 111, the axis of the second through hole 125 and the axis of the third through hole 131 overlap. In this way, it is helpful to speed up the flow speed of the electrolyte, improve the injection efficiency, and reduce the waste of the electrolyte during the injection process.

[0110] The area of ​​the second through hole 125 is greater than or equal to the area of ​​the third through hole 131; and / or the area of ​​the third through hole 131 is greater than or equal to the area of ​​the first through hole 111. In this way, the first through hole 111 can be completely exposed to the second through hole 125 and the third through hole 131, ensuring that the electrolyte can enter the pole core through the first through hole 111 in a timely and effective manner, reducing the leakage and waste of the electrolyte during the injection process.

[0111] In a possible implementation, the disk body 110 is provided with at least one third connection portion 112, and the at least one third connection portion 112 is suitable for connecting with the pole core. Wherein, the pole core 300 includes a pole ear, and the at least one third connection portion 112 is used for welding connection with the pole ear.

[0112] The at least one third connection portion 112 may be formed by a portion of the disk body 110 or may be an additional component. The connection between the disk body 110 and the at least one third connection portion 112 is achieved through a conventional connection method.

[0113] As an example, the third connection portion 112 is formed by a portion of the disk body 110. For example, a partial area of ​​the disk body 110 protrudes in a direction away from the fuse 120 to form at least one third connection portion 112. That is, at least one third connection portion 112 is a connection protrusion. In this way, the distance between at least one third connection portion 112 and the pole lug of the pole core 300 can be shortened, facilitating the connection between the two. Specifically, when the disk body 110 and the pole lug are welded by a welding process, the solder can melt through at least one third connection portion 112 more quickly, thereby achieving a firm connection between the disk body 110 and the pole lug. It should be noted that in this example, the welding method can preferably be laser welding.

[0114] It should be noted that when the third connection part 112 includes a plurality of third connection parts 112, the plurality of third connection parts 112 are arranged at intervals. The plurality of third connection parts 112 are arranged at intervals along the circumference of the first through hole 111. Exemplarily, the number of the third connection parts 112 is four, and the four third connection parts 112 are symmetrically arranged relative to the center of the first through hole 111.

[0115] The provision of multiple third connecting parts 112 enables the disk body 110 to adapt to pole lugs of different sizes and shapes. By selecting appropriate third connecting parts 112 for welding, a tight connection between the pole lug and the disk body 110 can be ensured, thereby improving the reliability and stability of the connection.

[0116] It should be noted that the protruding height of each third connection portion 112, or the distance between the surface of each third connection portion 112 facing away from the fuse 120 and the surface of the disk body 110 facing the fuse 120, can be freely set according to the distance between the disk body 110 and the pole ear of the pole core 300.

[0117] In this embodiment, each third connection portion 112 includes a first sub-connection portion 1121 and a second sub-connection portion 1122 connected to each other, and the extension direction of the first sub-connection portion 1121 intersects with the extension direction of the second sub-connection portion 1122. For example, the extension direction of the first sub-connection portion 1121 and the extension direction of the second sub-connection portion 1122 are perpendicular to each other, and a circular arc transition is used between the first sub-connection portion 1121 and the second sub-connection portion 1122.

[0118] The embodiment of the present application also provides a battery 1000, which can be a cylindrical battery, a square battery, or a soft-pack battery.

[0119] The battery 1000 includes a housing 200, which is a main body component of the battery 1000 and is used to provide support for other components of the battery 1000. A receiving cavity 210 with an opening is formed in the housing 200.

[0120] The battery 1000 further includes a pole core 300 and a cover plate 400 . The pole core 300 is disposed in the accommodating cavity 210 . The cover plate 400 is connected to the outer shell 200 and seals the opening so that the outer shell 200 and the cover plate 400 are enclosed to form a sealed structure.

[0121] The battery 1000 further includes the current collecting plate assembly 100 described in the first aspect. The current collecting plate assembly 100 is disposed between the pole core 300 and the cover plate 400 and is connected to the pole core 300 and the cover plate 400 respectively.

[0122] When the pole core 300 is working, the current flows from the pole core 300 through the disk body 110 of the current collecting disk assembly 100 and then through the fuse 120, and passes through the first connecting part 121 of the fuse 120 to the cover plate 400 and the external circuit; when the pole core 300 has thermal runaway, because the current flow cross-section of the fuse part 123 of the fuse 120 is smaller than that of other areas, fixed-point melting can be achieved to cut off the main current circuit. At this time, the loop current will directly drop sharply or return to zero to avoid further deterioration of thermal runaway, prevent fire and explosion, and improve the safety of the battery 1000.

[0123] And considering that in this embodiment, the battery 1000 includes the current collecting plate assembly 100 described in the first aspect, the battery 1000 has all the structures and beneficial effects of the current collecting plate assembly 100 .

[0124] The embodiment of the present application further provides a battery device, comprising the battery 1000 described in any of the above embodiments. In this embodiment, the number of batteries 1000 in the battery device can be one or more.

[0125] The battery device may further include a circuit structure, which is connected to the battery 1000 and is used to realize power output of the battery 1000 or protect the battery 1000 .

[0126] The present application also provides an electric device, including an electric device and the battery 1000 described in any of the above embodiments, the battery 1000 is connected to the electric device to provide electric energy to the electric device. Alternatively, the electric device includes an electric device and the battery device described in any of the above embodiments, the battery device is connected to the electric device to provide electric energy to the electric device.

[0127] The electrical equipment in the embodiments of the present application may be a vehicle, for example, a vehicle may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. Accordingly, the electrical device may be a driving mechanism of the vehicle or a control system of the vehicle.

[0128] In addition, the electrical equipment may also be other energy storage devices, such as energy storage power stations, mobile phones, portable devices, laptops, and wearable devices.

[0129] Since the electric device in this embodiment includes the battery 1000 or the battery device described in any of the above embodiments, the structure and beneficial effects of the electric device including the battery 1000 or the battery device will not be described in detail in this embodiment.

[0130] The various embodiments or implementation methods in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referenced to each other.

[0131] It should be noted that the phrases "one embodiment", "an embodiment", "an exemplary embodiment", "some embodiments", etc. mentioned in the specification indicate that the described embodiments may include certain features, structures or characteristics, but not every embodiment may include the certain features, structures or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. In addition, when describing certain features, structures or characteristics in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such features, structures or characteristics in conjunction with other embodiments, whether explicitly or not explicitly described.

[0132] 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 collecting plate assembly (100), characterized in that: include: A disk body (110), wherein the disk body (110) is suitable for being electrically connected to the pole core (300); a fuse (120), the fuse (120) being connected to the disk body (110), wherein the fuse (120) comprises a first connection portion (121), and the first connection portion (121) is suitable for connecting to a cover plate (400) of a battery (1000); In the thickness direction of the disk body, at least a portion of the orthographic projection of the first connecting portion (121) overlaps with the orthographic projection of the disk body (110).

2. The collecting plate assembly (100) according to claim 1, characterized in that: In the thickness direction of the disk body, the orthographic projection of the first connecting portion (121) is located within the orthographic projection of the disk body (110).

3. The collecting plate assembly (100) according to claim 2, characterized in that: The center of the first connecting portion (121) coincides with the center of the disk body (110).

4. The collecting plate assembly (100) according to claim 3, characterized in that: The fuse (120) further comprises a second connecting portion (122) and a fuse portion (123), wherein the second connecting portion (122) is connected to the disk body (110); One end of the fuse part (123) is connected to the second connection part (122), and the other end of the fuse part (123) is connected to the first connection part (121).

5. The collecting plate assembly (100) according to claim 4, characterized in that: The flow area of ​​the second connecting portion (122) is greater than the flow area of ​​the fuse portion (123).

6. The collecting plate assembly (100) according to claim 5, characterized in that: The cross section perpendicular to the disk body (110) is the longitudinal cross section; the longitudinal cross section area of ​​the fuse portion (123) is smaller than the longitudinal cross section area of ​​the second connection portion (122); And / or, the longitudinal cross-sectional area of ​​the fuse portion (123) is smaller than the longitudinal cross-sectional area of ​​the first connection portion (121).

7. The collecting plate assembly (100) according to any one of claims 4 to 6, characterized in that: The fuse (120) further comprises a stress buffer portion (124), wherein the stress buffer portion (124) is arranged on the fuse portion (123).

8. The collecting plate assembly (100) according to claim 7, characterized in that: The stress buffering portion (124) comprises a plurality of buffering protrusions connected to each other.

9. The collecting plate assembly (100) according to claim 8, characterized in that: The protruding directions of any two adjacent buffer protrusions are opposite.

10. The collecting plate assembly (100) according to claim 9, characterized in that: The protruding direction of the buffer protrusion is parallel to the thickness direction of the fuse part (123); or, the protruding direction of the buffer protrusion is perpendicular to the thickness direction of the fuse part (123).

11. The collecting plate assembly (100) according to claim 7, characterized in that: The stress buffering portion comprises a stress buffering layer, and the stress buffering layer covers the fuse portion (123).

12. The collecting plate assembly (100) according to any one of claims 4 to 6, characterized in that: The fuse part (123) and the first connecting part (121) and the second connecting part (122) are all separately arranged, and the fuse part (123) is a fuse.

13. The collecting plate assembly (100) according to claim 6 or 9, characterized in that: The fuse part (123) comprises at least two sub-fuse parts (1231) arranged at an interval from each other; Each of the sub-fuse portions (1231) is used to connect the first connection portion (121) and the second connection portion (122).

14. The collecting plate assembly (100) according to claim 13, characterized in that: The fuse part (123) is provided with at least one partition hole (1232), and the at least one partition hole (1232) partitions the fuse part (123) into at least two sub-fuse parts (1231).

15. The collecting plate assembly (100) according to claim 14, characterized in that: The fuse parts (123) include a plurality of fuse parts (123), and the plurality of fuse parts (123) are arranged at intervals along the circumferential direction of the first connecting part (121).

16. The collecting plate assembly (100) according to claim 15, characterized in that: The second connection part (122) includes at least one, and a plurality of the fuse parts (123) are connected to the disk body (110) via at least one of the second connection parts (122).

17. The collecting plate assembly (100) according to any one of claims 14 to 16, characterized in that: The disk body (110) is provided with a first through hole (111), and the fuse (120) is provided with a second through hole (125), and the first through hole (111) and the second through hole (125) at least partially overlap.

18. The collecting plate assembly (100) according to claim 17, characterized in that: The second through hole (125) is arranged on the first connecting portion (121), and the axis of the second through hole (125) coincides with the axis of the first through hole (111).

19. The collecting plate assembly (100) according to claim 18, characterized in that: The collecting disc assembly further comprises an insulating member (130), wherein the insulating member (130) is at least partially disposed between the disc body (110) and the fuse (120).

20. The collecting plate assembly (100) according to claim 19, characterized in that: The insulating member (130) is provided with a third through hole (131), the third through hole (131) at least partially overlaps with the first through hole (111), and the third through hole (131) at least partially overlaps with the second through hole (125), so that the first through hole (111) and the second through hole (125) are connected.

21. The collecting plate assembly (100) according to claim 20, characterized in that: The axis of the first through hole (111), the axis of the second through hole (125), and the axis of the third through hole (131) coincide with each other.

22. The collecting plate assembly (100) according to claim 21, characterized in that: The area of ​​the second through hole (125) is greater than or equal to the area of ​​the third through hole (131); And / or, the area of ​​the third through hole (131) is greater than or equal to the area of ​​the first through hole (111).

23. The collecting plate assembly (100) according to any one of claims 1 to 6, characterized in that: The disk body (110) is provided with at least one third connection portion (112), and the at least one third connection portion (112) is suitable for being connected to the pole core.

24. The collecting plate assembly (100) according to any one of claims 1 to 6, characterized in that: The fuse (120) and the disk body (110) are arranged separately.

25. A battery (1000), characterized in that: include: A housing (200), wherein a receiving cavity (210) having an opening is formed in the housing (200); A pole core (300), the pole core (300) being arranged in the accommodating cavity (210); a cover plate (400), the cover plate (400) being connected to the housing (200) and sealing the opening; The collecting plate assembly (100) according to any one of claims 1 to 24, wherein the collecting plate assembly (100) is arranged between the pole core (300) and the cover plate (400), and respectively connects the pole core (300) and the cover plate (400).

26. A battery device, characterized in that: Comprising the battery (1000) of claim 25.

27. An electrical equipment, characterized in that: Comprising an electric device and the battery (1000) according to claim 25, wherein the battery (1000) is connected to the electric device and is used to provide electric energy to the electric device; Alternatively, it comprises an electrical device and the battery device as claimed in claim 26, wherein the battery device is connected to the electrical device to provide electrical energy to the electrical device.

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