Collector plate assembly, battery, battery assembly and electric equipment

Abstract

The invention relates to the technical field of batteries, in particular to a collector plate assembly, a battery, a battery assembly and electric equipment. The collector plate assembly comprises a flow guide piece and a conductive piece, and the flow guide piece is provided with a fusing part. And the conductive part is arranged at the fusing part and is used for conducting the current of the current guide part, and / or the conductive part is used for increasing the overcurrent area of the current guide part. And the conductive part is configured to be melted or gasified when the temperature exceeds a first preset temperature, so that the current of the flow guide part is cut off. According to the collector plate assembly, the battery, the battery assembly and the electric equipment provided by the invention, not only can the large-current requirement be met, but also the current of the current guide piece can be cut off when the battery is short-circuited or abnormal instantaneous large current occurs, so that the safety performance of the battery is improved.

Description

Technical Field

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

[0002] In existing batteries, a current guide is typically installed inside the battery, connecting the battery cell to the polarity member through the current guide. This allows the battery cell's electrical energy to be transferred to the polarity member through the current guide. The polarity member is then electrically connected to the electrical device, enabling the battery cell to transfer electrical energy to the device. A fuse is typically provided on the current guide to reduce the guide's flow area. In the event of an internal short circuit, the fuse, due to its limited flow area, can melt, shutting off the current between the battery cell and the polarity member, thereby reducing safety risks.

[0003] However, the battery is unable to provide large current due to the limited flow area of ​​the fuse, and is difficult to be used in scenarios with large current demands. Summary of the Invention

[0004] The present application provides a collecting disc assembly, a battery, a battery assembly and an electrical device, which can not only meet the large current demand, but also realize that the current of the guide member can be disconnected when the battery is short-circuited or an abnormal instantaneous large current occurs, thereby improving the safety performance of the battery.

[0005] In a first aspect, the current collecting plate assembly provided by the present application includes: a flow guide and a conductive member, wherein the flow guide includes a fuse.

[0006] The conductive member is at least partially provided at the fuse part, and is used to conduct the current of the guide member and / or to increase the flow area of ​​the guide member.

[0007] The conductive member is configured to melt or vaporize when the temperature exceeds a first preset temperature, so as to cut off the current of the guide member.

[0008] In a possible implementation, the collecting plate assembly provided in the present application further includes a collecting plate, and the flow guide includes a first connecting portion and a second connecting portion, the first connecting portion is connected to the collecting plate, and the second connecting portion is suitable for connecting to the polarity member.

[0009] In a possible implementation, in the collecting plate assembly provided by the present application, the flow guide comprises a first sub-flow guide portion and a second sub-flow guide portion.

[0010] The first sub-guiding portion includes a first connecting portion and a third connecting portion.

[0011] The second sub-guiding portion includes a second connecting portion and a fourth connecting portion.

[0012] The third connection portion and the fourth connection portion are spaced apart, and a gap between the third connection portion and the fourth connection portion forms a fuse portion.

[0013] The first connection portion is suitable for being electrically connected to the battery core, and the second connection portion is suitable for being electrically connected to the polarity member.

[0014] In a possible implementation, in the current collecting plate assembly provided in the present application, at least a portion of the conductive member is disposed at the fuse portion, and the conductive member is respectively connected to the third connection portion and the fourth connection portion.

[0015] In one possible implementation, in the collecting plate assembly provided by the present application, the first sub-guide portion and the second sub-guide portion each include two surfaces opposite to each other along their thickness direction, and at least a portion of the conductive member is also provided on the surface of at least one first sub-guide portion and / or the surface of at least one second sub-guide portion.

[0016] In a possible implementation, in the collecting plate assembly provided in the present application, the third connecting portion and / or the fourth connecting portion is provided with a locking portion.

[0017] At least a portion of the conductive member is further disposed on the locking portion.

[0018] In one possible implementation, the collecting plate assembly provided in the present application has a locking portion that is a locking hole or a locking groove extending along the thickness direction of the third connecting portion, and / or a locking portion that is a locking hole or a locking groove extending along the thickness direction of the fourth connecting portion.

[0019] In one possible implementation, in the collecting plate assembly provided by the present application, the first connection part and the second connection part are respectively connected to the fuse part, and the flow area of ​​the fuse part is smaller than the flow area of ​​the first connection part, or the flow area of ​​the fuse part is smaller than the flow area of ​​the second connection part.

[0020] In a possible implementation, the fuse portion has at least one through hole, and the through hole penetrates the fuse portion along a thickness direction of the fuse portion.

[0021] In a possible implementation, the current collecting plate assembly provided in the present application has a plurality of through holes, and the through holes are arranged at intervals.

[0022] In a possible implementation, in the current collecting plate assembly provided in the present application, the through holes are arranged at intervals along the width direction of the fuse portion, and / or the through holes are arranged at intervals along the length direction of the fuse portion.

[0023] In a possible implementation, in the current collecting plate assembly provided by the present application, at least a portion of the conductive member is disposed within the through hole.

[0024] In a possible implementation, in the current collecting disc assembly provided by the present application, the fuse portion includes two surfaces facing each other along a thickness direction thereof, and at least a portion of the conductive member is disposed on a surface of at least one of the fuse portions.

[0025] In a possible implementation, in the current collecting plate assembly provided by the present application, the cross-sectional shape of the through hole in a direction perpendicular to the thickness of the fuse portion is at least one of circular, square, and strip-shaped.

[0026] In one possible implementation, the collecting plate assembly provided in the present application, the guide member includes multiple first connection parts and multiple fuse parts, the multiple fuse parts and the multiple first connection parts are arranged correspondingly, and the multiple first connection parts are respectively connected to the second connection parts through the multiple fuse parts.

[0027] In a possible implementation, in the current collecting plate assembly provided by the present application, the melting point of the conductive member is in the range of [85° C., 400° C.].

[0028] In a possible implementation, in the current collecting plate assembly provided in the present application, the conductive member is made of at least one of tin, tin-bismuth alloy, tin-indium alloy, aluminum-bismuth alloy, and tin-silver-copper alloy.

[0029] In a possible implementation, the current collecting plate assembly provided in the present application further includes an isolating member, which is disposed on the conductive member to isolate the electrolyte in the battery from the conductive member.

[0030] The separator is configured to melt or vaporize when the temperature exceeds a second preset temperature.

[0031] In a possible implementation, in the collecting plate assembly provided in the present application, the material of the isolation piece is at least one of polyphenylene sulfide, polyvinyl alcohol, polytetrafluoroethylene, polyperfluoroethylene propylene, polyetheretherketone, polyethylene, and polypropylene.

[0032] In a possible implementation, in the current collecting disc assembly provided by the present application, the melting point of the isolating member is less than or equal to the melting point of the conductive member.

[0033] In a possible implementation, in the current collecting plate assembly provided by the present application, the second connecting portion and the current collecting plate are spaced apart.

[0034] In a possible implementation, in the current collecting plate assembly provided by the present application, the first connecting portion is connected to a circumferential edge of the current collecting plate.

[0035] In a possible implementation, in the current collecting plate assembly provided by the present application, the first connecting portion is connected to a surface of one of the two surfaces of the current collecting plate that are opposite to each other along the thickness direction of the current collecting plate.

[0036] In a possible implementation, in the collecting plate assembly provided by the present application, the collecting plate and the flow guide are an integral part, or the flow guide includes a first sub-flow guide portion, and the collecting plate and the first sub-flow guide portion are an integral part.

[0037] In a possible implementation, in the current collecting plate assembly provided by the present application, the conductive member and the fuse portion are connected by at least one of riveting, hot melting, and coating.

[0038] In a second aspect, the present application further provides a battery, comprising:

[0039] Any current collecting plate assembly provided in the first aspect above.

[0040] The battery cell is connected to the current collecting plate assembly.

[0041] Polarity piece, connected to flow guide piece.

[0042] The shell is provided with a receiving cavity, and the battery core and the collecting plate assembly are both received in the receiving cavity.

[0043] In a possible implementation, the battery provided in the present application includes a current collecting plate assembly including a current collecting plate, a current guide member disposed on a side of the current collecting plate away from the battery cell; and a polarity member disposed on a side of the current guide member away from the battery cell.

[0044] In a third aspect, the present application further provides a battery assembly comprising any one of the batteries and a circuit structure provided in the second aspect, wherein the battery is electrically connected to the circuit structure.

[0045] In a fourth aspect, the present application further provides an electrical device comprising the battery provided in the second aspect above, and / or the battery assembly provided in the third aspect above.

[0046] The current collecting disc assembly provided by the present application includes a current guide, which includes a fuse part. The current collecting disc assembly also includes a conductive member, which is provided on the fuse part. After the conductive member is provided on the fuse part, it is used to conduct the current of the current guide and / or to increase the flow area of ​​the current guide, thereby increasing the flow area of ​​the current guide so that the battery of the present application can meet high current requirements. When the temperature exceeds a first preset temperature, the conductive member melts or vaporizes, thereby disconnecting the current guide, or reducing the flow area of ​​the fuse part so that it melts under the action of a large current, thereby disconnecting the current of the current guide to protect the battery. The current collecting disc assembly provided by the present application can not only meet high current requirements, but also disconnect the current of the current guide when the battery is short-circuited or an abnormal instantaneous large current occurs, thereby improving the safety performance of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces 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 any creative work.

[0048] Figure 1 This is a structural schematic diagram of a current collecting plate assembly according to an embodiment of the present application;

[0049] Figure 2 A cross-sectional view of a current collecting plate assembly according to an embodiment of the present application;

[0050] Figure 3 This is a schematic diagram of the structure of a current collecting plate assembly according to an embodiment of the present application;

[0051] Figure 4 A cross-sectional view of a current collecting plate assembly according to an embodiment of the present application;

[0052] Figure 5 This is a structural schematic diagram of a current collecting plate assembly according to an embodiment of the present application;

[0053] Figure 6 A cross-sectional view of a current collecting plate assembly according to an embodiment of the present application;

[0054] Figure 7 This is a structural schematic diagram of a current collecting plate assembly according to an embodiment of the present application;

[0055] Figure 8 This is a structural schematic diagram of a current collecting plate assembly according to an embodiment of the present application;

[0056] Figure 9 This is a structural schematic diagram of a current collecting plate assembly according to an embodiment of the present application;

[0057] Figure 10 This is a schematic diagram of the exploded structure of a current collecting plate assembly according to a certain embodiment of the present application.

[0058] Description of reference numerals:

[0059] 100-collecting plate;

[0060] 200 - flow guide; 210 - fuse; 211 - through hole; 220 - first sub-flow guide; 221 - locking portion; 230 - second sub-flow guide;

[0061] 201-first connection part; 202-second connection part; 203-third connection part; 204-fourth connection part;

[0062] 300-conductive parts;

[0063] 400-Isolator.

[0064] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0065] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of this application and are not intended to limit the scope of protection of this application. Those skilled in the art may adjust them as needed to suit specific applications.

[0066] Secondly, it should be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to a fixed connection, an indirect connection via an intermediate medium, internal communication between two components, or an interaction between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0067] Then, it should be noted that, in the description of this application, the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0068] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, unless otherwise specified, "plurality" means two or more.

[0069] In the prior art, a flow guide is typically provided within a battery, connecting the battery cell to the polarity member through the flow guide, allowing the battery cell's electrical energy to be output to the polarity member through the flow guide. The polarity member is then electrically connected to the electrical device to enable the battery cell to output electrical energy to the device. A fuse is typically provided on the flow guide to reduce the flow guide's flow area. When a short circuit or high current occurs within the battery, the fuse, due to its limited flow area, can melt, cutting off the current between the battery cell and the polarity member, thereby reducing safety hazards. However, due to the limited flow area of ​​the fuse, the battery is unable to provide high current, making it difficult to use in scenarios requiring high current.

[0070] Based on this, the current collecting tray assembly provided by the present application includes a current guide member, which includes a fuse portion. The current collecting tray assembly also includes a conductive member, which is disposed on the fuse portion. After being disposed on the fuse portion, the conductive member is used to conduct current through the current guide member and / or to increase the flow area of ​​the current guide member, thereby increasing the flow area of ​​the current guide member so that the battery of the present application can meet high current requirements. When the temperature exceeds a first preset temperature, the conductive member melts or vaporizes, thereby disconnecting the current guide member, or reducing the flow area of ​​the fuse portion to melt, thereby disconnecting the current of the current guide member and protecting the battery. The current collecting tray assembly provided by the present application can not only meet high current requirements, but also disconnect the current of the current guide member when the battery is short-circuited or an abnormal instantaneous high current occurs, thereby improving the safety performance of the battery.

[0071] In order to make the purpose, technical solutions and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below in conjunction with the drawings in the preferred embodiments of this application.

[0072] In the accompanying drawings, the same or similar reference numerals throughout represent the same or similar components or components with the same or similar functions. The described embodiments are part of the embodiments of the present application, rather than all of the embodiments. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be understood as limiting the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0073] In certain embodiments, reference Figures 1 to 4 As shown, the collecting plate assembly provided by the present application includes: a guide member 200 and a conductive member 300 , and the guide member 200 includes a fuse part 210 .

[0074] At least a portion of the conductive member 300 is disposed on the fuse portion 210 . The conductive member 300 is used to conduct the current of the flow guide 200 and / or to increase the flow area of ​​the flow guide 200 .

[0075] The conductive member 300 is configured to melt or gasify when the temperature exceeds a first preset temperature, so as to cut off the current of the flow guide 200 .

[0076] In some embodiments, a fuse portion 210 is provided on the guide member 200, and the fuse portion 210 is used to fuse under specific conditions (such as overcurrent or overheating), thereby cutting off the current of the guide member 200, improving the safety of the battery assembly, and preventing damage or danger caused by overheating.

[0077] In some embodiments, a conductive member 300 is disposed within the fuse portion 210 and can conduct current through the flow guide 200, thereby improving the flow-carrying capacity of the flow guide 200 and enabling the battery to provide high current. When the temperature is greater than or equal to a first predetermined temperature, the conductive member 300 melts or vaporizes, causing the fuse portion 210 to melt, disconnecting the flow guide 200 and effectively cutting off the current flowing through the flow guide 200.

[0078] In some embodiments, the conductive member 300 is disposed on the fuse portion 210. The conductive member 300 can be used to increase the flow area of ​​the flow guide 200, thereby improving the flow capacity of the flow guide 200 and enabling the battery to provide high current. To reduce the flow capacity of the flow guide 200, a through hole is typically provided in the fuse portion 210 to reduce the flow capacity of the flow guide 200. When the temperature is greater than or equal to a first preset temperature, the conductive member 300 melts or vaporizes, reducing the flow area of ​​the flow guide 200. This causes the fuse portion 210 to melt, disconnecting the flow guide 200 and effectively cutting off the current in the flow guide 200.

[0079] It should also be noted that by providing the conductive member 300 in the fuse part 210, the conductive member 300 improves the current-carrying capacity of the guide member 200, thereby achieving the battery's ability to provide large current while maintaining the battery's safety performance.

[0080] In some embodiments, the current collecting plate assembly further includes a current collecting plate 100 , and the flow guide 200 includes a first connecting portion 201 and a second connecting portion 202 . The first connecting portion 201 is connected to the current collecting plate 100 , and the second connecting portion 202 is suitable for connecting to a polarity member.

[0081] Specifically, the collecting plate assembly is provided with a collecting plate 100, and the collecting plate 100 can be connected to the pole ear on the battery cell. Since the collecting plate assembly includes a guide member 200, the guide member 200 is provided with a first connecting portion 201 and a second connecting portion 202, the first connecting portion 201 is connected to the collecting plate 100, and the second connecting portion 202 is connected to the polarity member. The collecting plate assembly is respectively connected to the battery cell and the polarity member, thereby realizing the conduction of the electric energy of the battery cell to the external circuit.

[0082] It should be noted that the current collecting plate assembly provided in the embodiment of the present application may also not be provided with the current collecting plate 100. In this case, the first connecting portion 201 is directly connected to the tab on the battery cell, and the second connecting portion 202 is connected to the polarity member, thereby achieving current conduction.

[0083] In a specific implementation, the length of the guide 200 can be adjusted according to the battery size, and a bending margin can be reserved to cope with thermal expansion. The cross-sectional shape of the guide 200 can be a flat strip or a stepped shape, which is not limited in this embodiment of the present application.

[0084] It should also be noted that the polar member may be a battery shell, a pole or a current-carrying member, and the embodiments of the present application do not impose specific limitations on this.

[0085] In some embodiments, reference Figure 1 and Figure 2 As shown, the flow guide 200 includes a first sub-flow guide portion 220 and a second sub-flow guide portion 230 .

[0086] The first sub-air guiding portion 220 includes a first connecting portion 201 and a third connecting portion 203 .

[0087] The second sub-air guiding portion 230 includes a second connecting portion 202 and a fourth connecting portion 204 .

[0088] The third connection portion 203 and the fourth connection portion 204 are spaced apart from each other, and a gap between the third connection portion 203 and the fourth connection portion 204 forms a fuse portion 210 .

[0089] Specifically, the current collecting tray assembly includes a current collecting tray 100 and a current guide 200, and the current collecting tray 100 is connected to the tabs on the battery cells. The current guide 200 is provided with a first sub-current guide portion 220 and a second sub-current guide portion 230. The first sub-current guide portion 220 includes a first connection portion 201 and a third connection portion 203, and the second sub-current guide portion 230 includes a second connection portion 202 and a fourth connection portion 204. The first connection portion 201 is connected to the current collecting tray 100, and the second connection portion 202 is connected to the polarity member. Furthermore, because the conductive member 300 is at least partially provided in the fuse portion 210, the conductive member 300 conducts the current between the third connection portion 203 and the fourth connection portion 204. Thus, the current generated by the battery cells can be sequentially conducted to the external circuit through the current collecting tray 100, the first connection portion 201, the third connection portion 203, the fourth connection portion 204, and the third connection portion 203, thereby achieving current transmission.

[0090] It should be noted that the fuse part 210 is formed by the gap between the third connecting part 203 and the fourth connecting part 204. When the temperature exceeds the first preset temperature, the conductive part 300 melts or vaporizes, so that the gap is re-formed between the third connecting part 203 and the fourth connecting part 204, thereby quickly cutting off the current on the guide part 200, protecting the battery, preventing overheating and potential safety hazards, and improving the safety of the battery.

[0091] It should be noted that, the third connection part 203 and the fourth connection part 204 are arranged at intervals. Compared with the solution in the prior art in which a through hole is provided in the fuse part 210 and the current is disconnected by the melting of the fuse part 210, the third connection part 203 and the fourth connection part 204 are arranged at intervals. The current disconnection speed can be improved, and the melting or vaporization of the conductive part 300 at the preset temperature is faster than the melting speed of the fuse part 210.

[0092] In some embodiments, reference Figure 1 and Figure 2 As shown, at least a portion of the conductive member 300 is disposed on the fuse portion 210 , and the conductive member 300 is connected to the third connection portion 203 and the fourth connection portion 204 , respectively.

[0093] Normally, the conductive member 300 will fill the fuse part 210. The volume of the conductive member 300 is positively correlated with the flow area of ​​the guide member 200. When the first sub-guide part 220 and the second sub-guide part 230 are connected through the conductive member 300 to achieve current conduction of the guide member 200, the flow area of ​​the conductive member 300 determines the flow area of ​​the guide member 200. At this time, in order to achieve high current output of the battery cell, the conductive member 300 can fill the gap between the third connecting part 203 and the fourth connecting part 204, that is, fill the fuse part 210. It should be noted that the gap space at this time refers to the gap extending from the third connecting part 203 to the fourth connecting part 204.

[0094] When the conductive member 300 is only provided in the fuse portion 210 and is connected to the third connection portion 203 and the fourth connection portion 204, the reliability of the connection between the conductive member 300 and the third connection portion 203 and the fourth connection portion 204 is not high. When the battery cell is subjected to working conditions such as vibration or impact, the connection between the conductive member 300 and the third connection portion 203 and the fourth connection portion 204 may easily become loose, thereby causing the battery to fail to work normally and reducing the reliability of the battery.

[0095] In some embodiments, reference Figure 1 and Figure 2As shown, the first sub-guiding portion 220 and the second sub-guiding portion 230 each include two surfaces facing each other along their thickness direction, and at least a portion of the conductive member 300 is also disposed on the surface of at least one of the first sub-guiding portion 220 and / or the surface of at least one of the second sub-guiding portion 230. This increases the contact area between the conductive member 300 and the third connecting portion 203 and the fourth connecting portion 204, making their connection more reliable and improving the safety and reliability of the battery. Furthermore, by disposing at least a portion of the conductive member 300 on the surface of the first sub-guiding portion 220 and / or the surface of the second sub-guiding portion 230, the flow area of ​​the first sub-guiding portion 220 and / or the second sub-guiding portion 230 can also be increased, thereby improving the flow capacity of the guide member 200 and enabling the battery to provide high current.

[0096] For example, at least a portion of the conductive member 300 can be provided on the surface of a first sub-conductor portion 220, or on the surfaces of two first sub-conductor portions 220; at least a portion of the conductive member 300 can be provided on the surface of a second sub-conductor portion 230, or on the surfaces of two second sub-conductor portions 230. The conductive member 300 can be provided on any surface to increase its connection area, thereby improving the reliability of the battery. The embodiments of the present application do not impose specific restrictions on this.

[0097] Furthermore, the third connection part 203 and / or the fourth connection part 204 is provided with a locking part 221, and at least a portion of the conductive member 300 is also provided on the locking part 221 to further improve the connection reliability between the conductive member 300 and the first sub-guiding part 220 and the second sub-guiding part 230.

[0098] In some embodiments, reference Figure 1 and Figure 2 As shown, the locking portion 221 provides a connection portion for the conductive member 300. The conductive member 300 can be firmly arranged on the third connection portion 203 and / or the fourth connection portion 204 through the locking portion 221, thereby improving the reliability of the connection between the conductive member 300 and the third connection portion 203 and / or the fourth connection portion 204, and preventing the conductive member 300 from loosening or falling off due to vibration or mechanical stress.

[0099] In some embodiments, reference Figure 1 and Figure 2 As shown, the locking portion 221 is a locking hole or a locking groove extending along the thickness direction of the third connecting portion 203 , and / or the locking portion 221 is a locking hole or a locking groove extending along the thickness direction of the fourth connecting portion 204 .

[0100] It can be understood that the mechanical fixation through the locking hole or the locking groove can improve the stability and reliability of the conductive member 300.

[0101] Furthermore, the conductive member 300 is in close contact with the third connection part 203 through the locking part 221, which can increase the flow area of ​​the third connection part 203; the conductive member 300 is in close contact with the fourth connection part 204 through the locking part 221, which can also increase the flow area of ​​the fourth connection part 204, thereby increasing the flow area of ​​the guide member 200, so that the battery has the ability to provide large current.

[0102] It should be noted that providing a locking portion 221 on one of the third connection portion 203 and the fourth connection portion 204 can also improve the connection strength, which will not be described in detail here.

[0103] It should be noted that the locking portion 221 may be a locking hole, a locking groove, or other locking structures, and the embodiment of the present application does not impose any specific restrictions on this.

[0104] Furthermore, multiple locking portions 221 may be provided, or only one may be provided. All embodiments in which the locking portion 221 is provided and the connection reliability can be improved are within the protection scope of this application.

[0105] In some embodiments, the first connection portion 201 and the second connection portion 202 are respectively connected to the fuse portion 210 .

[0106] The fuse portion 210 has at least one through-hole 211 extending through the fuse portion 210 along its thickness. The flow area of ​​the fuse portion 210 is smaller than that of the first connection portion 201, or smaller than that of the second connection portion 202. When the flow area of ​​the fuse portion 210 is smaller than that of the first connection portion 201, or smaller than that of the second connection portion 202, a short circuit in the battery cell will cause the fuse portion 210 to heat up rapidly, causing it to melt, thereby disconnecting the current from the current guide 200.

[0107] It should be noted that, typically, a through hole 211 is provided in the fuse portion 210 to reduce the flow area of ​​the fuse portion 210. However, the fuse portion 210 can also be provided in a bridge form, that is, the fuse portion 210 is relatively thin, and a bridge-like connection structure connects the first connection portion 201 and the second connection portion 202 respectively. In this case, the fuse portion 210 can also achieve the fusing effect, but the disadvantage is that if the fuse portion 210 is not thin enough, it will be difficult for the fuse portion 210 to melt. Of course, a fuse portion 210 with this structure can also implement this solution. It only needs to be provided with a conductive member 300 around the side of the fuse portion 210 to meet the requirement of high current conduction while allowing the fuse portion 210 to melt after the conductive member 300 melts or vaporizes.

[0108] In certain embodiments, reference Figures 3 to 10As shown, by providing at least one through-hole 211 in the fuse 210, the through-hole 211 can reduce the flow area of ​​the fuse 210, thereby reducing the flow area of ​​the flow guide 200. Under overcurrent or overheating conditions, the through-hole 211 can accelerate the melting or fracturing of the fuse 210. Furthermore, because the first connecting portion 201 and the second connecting portion 202 are respectively connected to the fuse 210, the fuse 210 can cut off the current between the first connecting portion 201 and the second connecting portion 202, thereby protecting the battery.

[0109] It should be noted that the number of through holes 211 can be one, the number of through holes 211 can be two, or the number of through holes 211 can be more than two. The number of through holes 211 can be determined according to the specific specifications of the battery cell, and the embodiment of the present application does not impose any specific restrictions on this.

[0110] In some embodiments, reference Figure 3 As shown, there are multiple through holes 211 , and the through holes 211 are arranged at intervals.

[0111] It can be understood that a plurality of spaced-apart through holes 211 are provided on the fuse part 210. By increasing the number of through holes 211, the flow area of ​​the fuse part 210 can be further reduced, so that when the conductive part 300 melts or vaporizes, the fuse part 210 can quickly cut off the current between the first connection part 201 and the second connection part 202, thereby improving the efficiency of the fuse part 210 in cutting off the current.

[0112] In some embodiments, reference Figure 3 As shown, the through holes 211 are arranged at intervals along the width direction of the fuse part 210 , and / or the through holes 211 are arranged at intervals along the length direction of the fuse part 210 .

[0113] Specifically, the through hole 211 is formed along the width direction of the fuse part 210 (ie Figure 3 When the conductive member 300 is arranged in an interval manner (in the X direction as indicated by the arrow in the middle), after the conductive member 300 is melted or vaporized, the flow area of ​​the fuse portion 210 is reduced, and the fuse portion 210 can be arranged along Figure 3 The X direction is disconnected as indicated by the middle arrow, and then the flow area on the fuse part 210 is further reduced to form a fuse state, so that the current between the first connection part 201 and the second connection part 202 is disconnected.

[0114] The through hole 211 is along the length direction of the fuse part 210 (ie Figure 3 When the conductive member 300 is arranged in a spaced manner (in the Y direction as indicated by the arrow in the middle), after the conductive member 300 is melted or vaporized, the flow area of ​​the fuse portion 210 is reduced, and the fuse portion 210 can be arranged along the Figure 3 The Y direction indicated by the middle arrow is disconnected to form a fused state, so that the current between the first connection part 201 and the second connection part 202 is disconnected.

[0115] In some embodiments, reference Figure 3 and Figure 4 As shown, at least a portion of the conductive member 300 is disposed in the through hole 211 .

[0116] It can be understood that at least part of the conductive member 300 is arranged in the through hole 211, which can increase the flow area of ​​the fuse part 210, thereby increasing the flow area of ​​the guide member 200, that is, improving the flow capacity of the guide member 200, so that the battery has the ability to provide large current.

[0117] In some embodiments, reference Figure 3 and Figure 4 As shown, the fuse part 210 includes two surfaces facing each other along the thickness direction thereof, and at least a portion of the conductive member 300 is disposed on a surface of at least one of the fuse parts 210 .

[0118] Specifically, by arranging at least a portion of the conductive member 300 on the surface of the fuse portion 210, the flow area of ​​the guide member 200 can be further increased, thereby improving the flow capacity of the guide member 200 and enabling the battery to provide large current.

[0119] It should be noted that if there is a requirement for the thickness of the flow guide 200 , the conductive member 300 only needs to be filled in the through hole 211 to enable the battery to have the ability to provide a large current.

[0120] In some embodiments, the conductive member 300 may also be arranged only on the surface of the fuse part 210. For example, the conductive member 300 is a sheet structure with a certain thickness. By attaching the conductive member 300 to at least one surface of the fuse part 210, the current carrying capacity of the fuse part 210 can be improved. This embodiment is suitable for a collecting plate assembly that does not have high requirements on the thickness of the fuse part 210.

[0121] Furthermore, at least a portion of the conductive member 300 may be disposed on the surface of one fuse portion 210 , or may be disposed on the surfaces of two fuse portions 210 , and this embodiment of the present application does not impose any specific limitation on this.

[0122] In some embodiments, the cross-sectional shape of the through hole 211 perpendicular to the thickness of the fuse 210 is at least one of a circle, a square, and a strip. This is merely an example of a shape suitable for processing the flow guide 200. In some embodiments, any through hole 211 that can reduce the flow area of ​​the fuse 210 is within the scope of protection of this application, such as a triangle, an ellipse, etc., and is not further described here.

[0123] In a specific implementation, the number of through holes 211 can be multiple, and the shape of each through hole 211 can be circular; the shape of each through hole 211 can be square; the shape of each through hole 211 can be bar-shaped; the shape of each through hole 211 can also include two of circular, square, and bar shapes at the same time; the shape of each through hole 211 can also include circular, square, and bar shapes at the same time. As long as the through hole 211 can achieve the effect of reducing the flow area of ​​the fuse part 210, the embodiment of the present application does not impose any specific restrictions on the shape of the through hole 211.

[0124] In some embodiments, reference Figure 5 As shown, the guide member 200 includes multiple first connection parts 201 and multiple fuse parts 210. The multiple fuse parts 210 and the multiple first connection parts 201 are correspondingly arranged, and the multiple first connection parts 201 are respectively connected to the second connection parts 202 through the multiple fuse parts 210.

[0125] It should be noted that by providing multiple first connection parts 201 and fuse parts 210, the current load can be evenly distributed, the current load of a single first connection part 201 and fuse part 210 is reduced, the risk of overheating and overload is reduced, and the electrical performance and safety of the battery are improved.

[0126] In some embodiments, the melting point of the conductive member 300 is in the range of [85° C., 400° C.].

[0127] It should be noted that the material of the guide member 200 can be copper or aluminum, the melting point of the guide member 200 can be above 1000°C, and the melting point of the conductive member 300 is between 85°C and 400°C, that is, the melting point of the conductive member 300 is lower than the melting point of the guide member 200, so that in the case of overcurrent or overheating, the conductive member 300 will melt first, thereby disconnecting the guide member 200 or reducing the flow area of ​​the fuse part 210 to form a fuse state, thereby disconnecting the guide member 200 and achieving the effect of cutting off the current on the guide member 200.

[0128] In some embodiments, the conductive element 300 is made of at least one of tin, tin-bismuth alloy, tin-indium alloy, aluminum-bismuth alloy, and tin-silver-copper alloy.

[0129] It should be noted that materials such as tin, tin-bismuth alloy, tin-indium alloy, aluminum-bismuth alloy, tin-silver-copper alloy, etc. have good conductivity, ensuring that under normal operating conditions, the conductive member 300 can efficiently conduct current, thereby improving the performance of the collecting plate assembly.

[0130] It should be noted that the melting point of tin is 231°C, the melting point of tin-bismuth alloy and tin-indium alloy is 118°C, the melting point of aluminum-bismuth alloy is 125°C, and the melting point of tin-silver-copper alloy is 217°C. These materials have relatively low melting points. Under overcurrent or overheating conditions, the conductive member 300 can melt quickly, thereby causing the fuse 210 to melt or reducing the flow area of ​​the fuse 210 to form a melted state, thereby disconnecting the flow guide 200 and effectively cutting off the current flowing through the flow guide 200.

[0131] In some embodiments, reference Figure 1 As shown, the battery further includes an isolating member 400, which is disposed on the conductive member 300 to isolate the electrolyte in the battery from the conductive member 300. It should be noted that, generally, the isolating member 400 will wrap around the conductive member 300 to isolate the conductive member 300 from the electrolyte.

[0132] The separator 400 is configured to melt or gasify when the temperature exceeds a second preset temperature.

[0133] Specifically, the isolation member 400 effectively isolates the electrolyte from the conductive member 300, preventing the electrolyte from directly contacting the conductive member 300, reducing the risk of corrosion of the conductive member 300 by the electrolyte, extending the service life of the conductive member 300, and improving the reliability and durability of the battery.

[0134] The isolation member 400 is disposed on the conductive member 300. For example, the isolation member 400 can be disposed on the conductive member 300 by means of plastic coating, or other arrangements can be adopted. This embodiment of the present application does not impose any specific limitation on this.

[0135] In some embodiments, reference Figure 1 As shown, the material of the isolation member 400 is at least one of polyphenylene sulfide, polyvinyl alcohol, polytetrafluoroethylene, polyperfluoroethylene propylene, polyetheretherketone, polyethylene and polypropylene.

[0136] It should be noted that materials such as polyphenylene sulfide, polyvinyl alcohol, polytetrafluoroethylene, polytetrafluoroethylene, polyetheretherketone, polyethylene and polypropylene generally have excellent chemical stability, can resist corrosion by the electrolyte, effectively prevent the electrolyte from corroding the conductive part 300, improve the reliability and durability of the battery, and extend the service life of the battery assembly.

[0137] In some embodiments, reference Figure 1 As shown, the melting point of the isolation member 400 is less than or equal to the melting point of the conductive member 300 .

[0138] Specifically, when the temperature rises, the isolating member 400 will melt or vaporize before the conductive member 300 , and then the conductive member 300 will melt or vaporize, so that the fuse 210 can function to cut off the current on the guide member 200 .

[0139] In some embodiments, the second connection portion 202 is spaced apart from the current collecting tray 100. Since the second connection portion 202 is used to electrically connect to the polarity member, if the second connection portion 202 is connected to the current collecting tray 100, the polarity member is directly electrically connected to the current collecting tray 100, and the current guide 200 loses its current limiting function, increasing the safety risk of the battery. Therefore, spacing the second connection portion 202 and the current collecting tray 100 can improve battery safety.

[0140] In some embodiments, reference Figure 1 As shown, the first connection portion 201 is connected to the circumferential edge of the current collecting tray 100. This connection process is simple and is a common method of connecting the current guide 200 and the current collecting tray 100 in the prior art. During battery assembly, the current guide 200 is folded toward the battery cells and the second connection portion 202 is folded to the side of the current collecting tray 100 away from the battery cells. The entire current guide 200 can then be placed into the battery casing.

[0141] In some embodiments, reference Figures 8 to 10 As shown, the first connecting portion 201 is connected to a surface of one of the two opposite surfaces of the current collecting plate 100 along the thickness direction of the current collecting plate 100 .

[0142] It should be noted that the first connection portion 201 is connected to a surface of one of the current collecting plates 100 , and the other surface of the current collecting plate 100 can be used to connect to a tab on a battery cell.

[0143] In some embodiments, reference Figure 8 As shown, the current collecting plate 100 and the flow guide 200 are an integral part, or the flow guide 200 includes a first sub-flow guide portion 220 , and the current collecting plate 100 and the first sub-flow guide portion 220 are an integral part.

[0144] It can be understood that the integrated design reduces the resistance between the connection points, improves the current conduction efficiency between the collecting plate 100 and the guide member 200 or the first sub-guide portion 220, reduces energy loss, and thus improves the overall performance of the battery.

[0145] See also Figure 1 In this case, the collecting plate 100 and the first sub-flow guide portion 220 can be an integral part.

[0146] See also Figure 8 In this case, the flow guide 200 and the collecting plate 100 may be an integral piece. In some embodiments, the collecting plate 100 and the flow guide 200 may be simultaneously stamped out of the material by stamping.

[0147] The integrated structure also reduces the number of connection points, improves the firmness of the connection between the collecting plate 100 and the guide member 200 or the first sub-guide portion 220 , and improves the reliability of the collecting plate assembly.

[0148] In some embodiments, reference Figures 1 to 10 As shown, the conductive member 300 and the fuse part 210 are connected by at least one of riveting, hot melting, and coating.

[0149] For example, the conductive member 300 may be fixed to the fuse part 210 by riveting. The conductive member 300 and the fuse part 210 may have greater mechanical strength and be able to withstand greater mechanical stress.

[0150] refer to Figures 8 to 10 The conductive member 300 is set in a rivet shape to pass through the through hole 211, and then the conductive member 300 is formed into an I-shaped structure using a tool, so as to achieve fixed riveting of the conductive member 300 and the fuse part 210.

[0151] It should be noted that when the conductive member 300 is made of a material with relatively low rigidity, it can be processed into an I-shape according to the above method, so that the conductive member 300 and the fuse part 210 are fixedly connected.

[0152] In some embodiments, if the material of the conductive member 300 is highly rigid, other methods may be used to secure the connection, such as providing a threaded structure on the inner wall of the through hole 211 and providing threads on the conductive member 300. In this case, the conductive member 300 may be threadedly connected to the through hole 211.

[0153] All embodiments that can achieve a fixed connection between the conductive member 300 and the fuse part 210 are within the protection scope of this application. This application does not impose any specific restrictions on the fixed connection method between the conductive member 300 and the fuse part 210.

[0154] It should be noted that when the fuse part 210 is a bridge-shaped connection structure, the conductive part 300 can be attached to the side of the fuse part 210, and the conductive part 300 and the fuse part 210 can be fixedly connected by wrapping the conductive part 300 with the isolation part 400. This method can also achieve the beneficial effects of the present application.

[0155] Of course, since the melting point of the conductive member 300 is lower than that of the guide member 200 , in some embodiments, the conductive member 300 can also be melted and combined with the fuse part 210 by hot melt heating, so that the conductive member 300 and the fuse part 210 form a firm combination.

[0156] The conductive member 300 may also be directly coated on the fuse part 210 . As long as the conductive member 300 can be provided on the fuse part 210 , the embodiment of the present application does not impose any specific limitation on this.

[0157] The present application also provides a battery, comprising the current collecting disc assembly, polarity parts and battery cells provided in the present application, wherein the current collecting disc assembly is electrically connected to the battery cells and the polarity parts respectively.

[0158] The battery also includes a shell with a receiving cavity, and the battery core and the current collecting plate assembly are both received in the receiving cavity.

[0159] The specific structure and working mode of the collecting plate assembly are described in detail in the above embodiments and will not be described again here.

[0160] Specifically, the battery cell and the current collecting plate assembly are connected, and since the current collecting plate assembly includes a guide member 200, the guide member 200 is connected to the polarity member, so that the current collecting plate assembly connects the battery cell and the polarity member, and can conduct the current generated by the battery cell to the external circuit.

[0161] The housing provides physical protection, preventing damage to the battery cells from external impacts and environmental factors, improving the battery's mechanical stability and durability and reducing the risk of failure due to external factors. A cavity is provided within the housing to accommodate the battery cells and collector plate assembly.

[0162] In some embodiments, reference Figure 8 and Figure 9 As shown, the current collecting plate assembly includes a current collecting plate 100, a current guide 200 is provided on a side of the current collecting plate 100 away from the battery cell; and a polarity member is provided on a side of the current guide 200 away from the battery cell.

[0163] Specifically, by setting up the collecting plate 100, the collecting plate 100 can be used to connect with the pole ear on the battery cell. Since the guide member 200 is used to connect with the polarity member, the guide member 200 is located on the side of the collecting plate 100 away from the battery cell, and the polarity member is located on the side of the guide member 200 away from the battery cell, which helps to achieve electrical isolation, prevent direct contact between the battery cell and the polarity member, and reduce the possibility of short circuit.

[0164] The present application also provides a battery assembly comprising a battery provided herein and a circuit structure, wherein the battery is electrically connected to the circuit structure. It should be noted that the battery assembly may include only one battery or multiple batteries. In certain embodiments, when there are multiple batteries, the circuit structure may also enable the connection of multiple batteries in series and / or in parallel.

[0165] The present application also provides an electrical device, a battery provided herein, and / or a battery assembly provided herein. The battery provided herein can achieve high current flow capacity while having good safety performance, thereby improving the safety and reliability of the electrical device and making it more competitive in the market.

[0166] It should be noted that the electrical equipment can be a two- or three-wheeled electric vehicle, or other electrical equipment that requires the use of batteries, and no specific restrictions are made here.

[0167] Those skilled in the art will appreciate that the current collecting tray assembly, battery, battery assembly, and electrical equipment provided herein include a current collecting tray assembly comprising a current guide 200 and a conductive member 300. The current guide 200 includes a fuse 210, at least a portion of which is disposed within the fuse 210. The conductive member 300, when disposed within the fuse 210, is used to conduct current through the current guide 200 and / or to increase the flow area of ​​the current guide 200, thereby increasing the flow area of ​​the current guide 200 and enabling the battery of the present invention to meet high current requirements. When the temperature exceeds a first preset temperature, the conductive member 300 melts or vaporizes, thereby disconnecting the current guide, or reduces the flow area of ​​the fuse 210 so that it can fuse under high current, thereby disconnecting the current from the current guide 200 and protecting the battery. The current collecting plate assembly provided in the present application can not only meet the large current demand, but also can disconnect the current of the guide member 200 when the battery is short-circuited or an abnormal instantaneous large current occurs, thereby improving the safety performance of the battery.

[0168] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0169] It will be understood that the various numerical numbers involved in the embodiments of the present application are merely distinctions for the convenience of description and are not intended to limit the scope of the embodiments of the present application.

[0170] Thus far, the technical solutions of the present application have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is readily understood by those skilled in the art that the scope of protection of the present application is obviously not limited to these specific embodiments. Without departing from the principles of the present application, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will fall within the scope of protection of the present application.

Claims

1. A collecting plate assembly, characterized in that: include: A flow guide (200) comprising a fuse portion (210); a conductive member (300) at least partially disposed on the fuse portion (210), the conductive member (300) being used to conduct the current of the flow guide member (200), and / or the conductive member (300) being used to increase the flow area of ​​the flow guide member (200); The conductive member (300) is configured to melt or gasify when the temperature exceeds a first preset temperature, so as to disconnect the current of the flow guide member (200).

2. The collecting plate assembly according to claim 1, characterized in that: The collecting plate assembly further comprises a collecting plate (100), and the flow guide member (200) comprises a first connecting portion (201) and a second connecting portion (202), wherein the first connecting portion (201) is connected to the collecting plate (100), and the second connecting portion (202) is suitable for connecting to a polarity member.

3. The collecting plate assembly according to claim 1 or 2, characterized in that: The flow guide (200) comprises a first sub-flow guide portion (220) and a second sub-flow guide portion (230); The first sub-flow guiding portion (220) comprises a first connecting portion (201) and a third connecting portion (203); The second sub-flow guiding portion (230) comprises a second connecting portion (202) and a fourth connecting portion (204); The third connecting portion (203) and the fourth connecting portion (204) are arranged at intervals, and the gap between the third connecting portion (203) and the fourth connecting portion (204) forms the fuse portion (210); The first connecting portion (201) is suitable for being electrically connected to a battery core, and the second connecting portion (202) is suitable for being electrically connected to a polarity member.

4. The collecting plate assembly according to claim 3, characterized in that: At least a portion of the conductive member (300) is provided on the fuse portion (210), and the conductive member is respectively connected to the third connection portion (203) and the fourth connection portion (204).

5. The collecting plate assembly according to claim 4, characterized in that: The first sub-guiding portion (220) and the second sub-guiding portion (230) each comprise two surfaces facing each other along a thickness direction thereof, and at least a portion of the conductive member (300) is further provided on a surface of at least one of the first sub-guiding portion (220) and / or a surface of at least one of the second sub-guiding portion (230).

6. The collecting plate assembly according to claim 5, characterized in that: The third connecting portion (203) and / or the fourth connecting portion (204) is provided with a locking portion (221); At least a portion of the conductive member (300) is also provided on the locking portion (221).

7. The collecting plate assembly according to claim 6, characterized in that: The locking portion (221) is a locking hole or a locking groove extending along the thickness direction of the third connecting portion (203), and / or the locking portion (221) is a locking hole or a locking groove extending along the thickness direction of the fourth connecting portion (204).

8. The collecting plate assembly according to claim 3, characterized in that: The first connection portion (201) and the second connection portion (202) are respectively connected to the fuse portion (210); the flow area of ​​the fuse portion (210) is smaller than the flow area of ​​the first connection portion (201), or the flow area of ​​the fuse portion (210) is smaller than the flow area of ​​the second connection portion (202).

9. The collecting plate assembly according to claim 8, characterized in that: The fuse part (210) is provided with at least one through hole (211), and the through hole (211) penetrates the fuse part (210) along the thickness direction of the fuse part (210).

10. The collecting plate assembly according to claim 9, characterized in that: There are a plurality of through holes (211), and the through holes (211) are arranged at intervals.

11. The collecting plate assembly according to claim 10, characterized in that: The through holes (211) are arranged at intervals along the width direction of the fuse part (210), and / or the through holes (211) are arranged at intervals along the length direction of the fuse part (210).

12. The collecting plate assembly according to claim 9, characterized in that: At least a portion of the conductive member (300) is disposed in the through hole (211).

13. The collecting plate assembly according to claim 8, wherein: The fuse part (210) comprises two surfaces facing each other along a thickness direction thereof, and at least a portion of the conductive member (300) is arranged on a surface of at least one of the fuse parts (210).

14. The collecting plate assembly according to claim 9, wherein: The cross-sectional shape of the through hole (211) in a direction perpendicular to the thickness of the fuse portion (210) is at least one of a circle, a square, and a strip.

15. The collecting plate assembly according to claim 3, characterized in that: The flow guide (200) comprises a plurality of first connecting parts (201) and a plurality of fuse parts (210), the plurality of fuse parts (210) and the plurality of first connecting parts (201) are arranged correspondingly, and the plurality of first connecting parts (201) are connected to the second connecting parts (202) via the plurality of fuse parts (210).

16. The collecting plate assembly according to any one of claims 1 to 15, characterized in that: The melting point of the conductive member (300) is in the range of [85°C, 400°C].

17. The collecting plate assembly according to claim 16, wherein: The material of the conductive element (300) is at least one of tin, tin-bismuth alloy, tin-indium alloy, aluminum-bismuth alloy, and tin-silver-copper alloy.

18. The collecting plate assembly according to any one of claims 1 to 15, characterized in that: It also includes an isolating member (400), the isolating member (400) being arranged on the conductive member (300) to isolate the electrolyte in the battery from the conductive member (300); The isolation member (400) is configured to melt or gasify when the temperature exceeds a second preset temperature.

19. The collecting plate assembly according to claim 18, wherein: The material of the isolation member (400) is at least one of polyphenylene sulfide, polyvinyl alcohol, polytetrafluoroethylene, polyperfluoroethylene propylene, polyetheretherketone, polyethylene and polypropylene.

20. The collecting plate assembly according to claim 18, wherein: The melting point of the isolation member (400) is less than or equal to the melting point of the conductive member (300).

21. The collecting plate assembly according to any one of claims 2 to 15, characterized in that: The second connecting portion (202) and the current collecting plate (100) are arranged at intervals.

22. The collecting plate assembly according to claim 21, wherein: The first connecting portion (201) is connected to the circumferential edge of the collecting plate (100).

23. The collecting plate assembly according to claim 21, wherein: The current collecting disc (100) has two surfaces facing each other in the thickness direction thereof, and the first connecting portion (201) is connected to a surface of one of the current collecting discs (100).

24. The collecting plate assembly according to any one of claims 2 to 15, characterized in that: The collecting plate (100) and the flow guide (200) are an integral part, or, The flow guide (200) comprises a first sub-flow guide portion (220), and the collecting plate (100) and the first sub-flow guide portion (220) are an integral part.

25. The collecting plate assembly according to any one of claims 1 to 15, characterized in that: The conductive member (300) and the fuse part (210) are connected by at least one of riveting, hot melting, and coating.

26. A battery, characterized in that: include: The collecting plate assembly according to any one of claims 1 to 25; A battery cell connected to the current collecting plate assembly; a polarity member connected to the flow guide member (200); The housing is provided with a receiving cavity, and the battery core and the collecting plate assembly are both received in the receiving cavity.

27. The battery according to claim 26, characterized in that The current collecting disc assembly comprises a current collecting disc (100), the current guide member (200) is arranged on a side of the current collecting disc (100) away from the battery core; and the polarity member is arranged on a side of the current guide member (200) away from the battery core.

28. A battery assembly, characterized in that: The invention comprises a battery and a circuit structure according to any one of claims 26 to 27, wherein the battery is electrically connected to the circuit structure.

29. An electrical device, characterized in that: The battery according to any one of claims 26-27, and / or the battery assembly according to claim 28.

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