Current collecting assembly, battery and electric equipment

Abstract

The utility model discloses a current collecting assembly which comprises a first current collecting piece and at least one second current collecting piece, the at least one second current collecting piece is arranged on the surface of one side of the first current collecting piece, and at least one of the first current collecting piece and the at least one second current collecting piece is provided with a magnet. The first current collecting piece is magnetically connected with the at least one second current collecting piece through the magnet; wherein at the preset temperature, the magnet loses magnetic force, so that the first current collecting piece and the at least one second current collecting piece are disconnected from each other. Therefore, the two current collecting pieces of the current collecting assembly are magnetically connected, so that the power loss of the battery can be reduced under the condition that the normal use overcurrent capability of the battery is ensured; meanwhile, under the condition that the battery is short-circuited, the temperature of the current collecting assembly continuously rises, when the temperature rises to the preset temperature and exceeds the Curie temperature of the magnet, the magnet loses the magnetic force, the first current collecting piece and the second current collecting piece are disconnected, the battery is interrupted, and the safety of the battery is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium ion batteries, in particular to a current collecting component, a battery provided with the current collecting component and an electrical equipment provided with the battery. Background Art

[0002] As a new energy source, lithium-ion batteries are playing an increasingly important role in energy storage and power; however, lithium-ion batteries have certain safety hazards during use, especially when the battery is short-circuited, a huge current will be generated, followed by a large amount of heat, which may cause the battery to catch fire and explode, resulting in safety accidents. In order to prevent safety accidents, it is required that the battery should not explode or catch fire when it is short-circuited to avoid safety problems. In the prior art, a method is usually adopted in which a connecting piece is set to cause a high-temperature fuse to melt, resulting in a short circuit in the circuit; however, increasing the fuse melting will cause the internal resistance of the battery to be too large when it is used, resulting in greater power loss of the battery. Utility Model Content

[0003] In view of this, the purpose of the present invention is to provide a current collecting assembly, a battery and an electrical device, which can solve the problems of explosion and fire caused by battery short circuit.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A current collecting assembly, comprising:

[0006] The first current collecting piece;

[0007] at least one second current collecting member, which is disposed on a side surface of the first current collecting member, at least one of the first current collecting member and the at least one second current collecting member is provided with a magnet, and the first current collecting member and the at least one second current collecting member are magnetically connected through the magnet;

[0008] Wherein, at a preset temperature, the magnet loses its magnetic force so that the first current collecting member and the at least one second current collecting member are disconnected from each other.

[0009] Optionally, in the above-mentioned current collecting assembly, the first current collecting piece includes a pole connecting portion, an intermediate portion and a pole lug connecting portion connected in sequence, the pole connecting portion connects the pole, the pole lug connecting portion connects the pole lug, and the intermediate portion connects the at least one second current collecting piece.

[0010] Optionally, in the above current collecting assembly, the middle portion is provided with a mounting hole for mounting the at least one second current collecting member.

[0011] Optionally, in the above current collecting assembly, the first current collecting member includes a first body portion and a first connecting portion, and the first body portion is connected to the pole;

[0012] The second current collector comprises a second body portion and a second connecting portion, and the second body portion is connected to the electrode lug;

[0013] Along the thickness direction, the first connection portion at least partially overlaps with the second connection portion.

[0014] Optionally, in the above-mentioned current collecting assembly, the sum of the thickness of the first connecting portion and the second connecting portion is greater than or equal to the thickness of the first main body portion and greater than or equal to the thickness of the second main body portion.

[0015] Optionally, in the above current collecting assembly, one of the first current collecting member and the second current collecting member is a magnet, and the other is magnetically connected to the magnet via a connecting member.

[0016] Optionally, in the above-mentioned current collecting assembly, a first slot for placing the connecting member is formed on a side of the other member facing away from the magnet.

[0017] Optionally, in the above current collecting assembly, the first current collecting member and the second current collecting member are both provided with magnets, which are the first magnet and the second magnet respectively;

[0018] A second slot for accommodating the first magnet is provided on a surface of the first current collecting member facing away from the second current collecting member;

[0019] And / or, a third slot for accommodating the second magnet is formed on a side of the second current collecting member facing away from the first current collecting member.

[0020] A battery comprises the above-mentioned current collecting assembly.

[0021] An electrical device comprises the above-mentioned battery.

[0022] It can be seen from the above technical scheme that the two current collecting parts of the current collecting assembly of the utility model are magnetically connected, which can reduce the power loss of the battery (that is, reducing the internal resistance of the battery can reduce energy loss) while ensuring the current capacity of the battery in daily use; at the same time, it can also make the current collecting assembly blown or disconnected in time. When the battery is short-circuited, the temperature of the current collecting assembly continues to rise. When the temperature rises to the preset temperature, it exceeds the Curie temperature of the magnet, the magnet loses its magnetic force, and the first current collecting part is disconnected from the second current collecting part, so that the battery is interrupted to ensure the safety of the battery; or the part of the first current collecting part originally connected to the second current collecting part has a reduced current conduction area and a instantly increased resistance value due to the separation of the two current collecting parts, and the temperature rise is accelerated, so that the current collecting assembly can blown before fire and explosion, so that the entire battery current is disconnected to ensure the safety of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 An exploded view of the current collecting assembly provided in the first embodiment of the utility model;

[0025] Figure 2 A schematic diagram of the structure of a current collecting assembly provided in Embodiment 1 of the present utility model;

[0026] Figure 3 A schematic structural diagram of a first current collecting member provided in Embodiment 1 of the utility model;

[0027] Figure 4 A schematic diagram of the structure of the second current collecting member provided in the first embodiment of the utility model;

[0028] Figure 5 The cross section of the current collecting assembly provided in the first embodiment of the utility model Figure 1 ;

[0029] Figure 6 The cross section of the current collecting assembly provided in the first embodiment of the utility model Figure 2 ;

[0030] Figure 7 A schematic diagram of the structure of a current collecting assembly provided in Embodiment 2 of the present utility model;

[0031] Figure 8 A schematic diagram of the structure of a first current collecting member provided in Embodiment 2 of the present utility model;

[0032] Fig. 9 A schematic diagram of the structure of a second current collecting member provided in the second embodiment of the utility model;

[0033] Fig.10 The cross section of the current collecting assembly provided in the third embodiment of the utility model Figure 1 ;

[0034] Fig.11 The cross section of the current collecting assembly provided in the third embodiment of the present utility model Figure 2 .

[0035] in:

[0036] 1-first current collecting part, 11-second slot, 2-second current collecting part, 21-third slot,

[0037] 3- first magnet, 4- second magnet. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0039] In the description of the utility model, it should be noted that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the utility model product is usually placed when in use, and are only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0040] In the prior art, the fuse structure is set by reducing the cross-sectional area of ​​the connecting piece. When a battery short-circuits and a large current passes through, the fuse structure can generate a large amount of heat, and melts and cuts off the current path after reaching its own melting point. However, the method of reducing the cross-sectional area will increase the internal resistance of the battery, which cannot meet the development demand of low internal resistance of the battery. Therefore, the present application intends to propose a new current collecting component that can cut off the current in time when the battery is short-circuited while ensuring the design of low internal resistance of the battery.

[0041] like Figures 1 to 11 As shown, an embodiment of the utility model provides a current collecting assembly, which can solve the problem of large internal resistance of the battery under normal operation.

[0042] First, the current collecting assembly includes a first current collecting part 1 and at least one second current collecting part 2, wherein at least one second current collecting part 2 is arranged on one side surface of the first current collecting part 1, and at least one of the first current collecting part 1 and at least one second current collecting part 2 is provided with a magnet, and the first current collecting part 1 and at least one second current collecting part 2 are magnetically connected by the magnet, that is, the first current collecting part 1 and the second current collecting part 2 are fitted and connected by magnetic force; wherein, at a preset temperature, the magnet loses its magnetic force so that the first current collecting part 1 and at least one second current collecting part 2 are disconnected from each other. It should be noted that the preset temperature refers to the Curie temperature, that is, the temperature at which the spontaneous magnetization intensity in the magnetic material drops to zero, and the critical point at which the magnetism of the magnet is transformed into a paramagnetic substance. In addition, the preset temperature is set between 100°C and 150°C to avoid the storage or normal use of the battery being affected by too low a temperature, that is, the preset temperature should be greater than the normal operating temperature of the battery, and it should be ensured that when the battery is not in operation, the first current collector 1 and the second current collector 2 will not be disconnected when the storage environment temperature is high, and the subsequent use of the battery will not be affected by the disconnection of the first current collector 1 and the second current collector 2; at the same time, it should be avoided that the temperature is too high to achieve the purpose of disconnecting the battery and cannot play a role in ensuring the safety of the battery. At the same time, the magnetic connection can be that both are magnets or one is a magnet and the other is a magnetic material that can be attracted by a magnet. Magnets of different materials and different magnetic material contents have different Curie temperatures, and different magnets can be selected according to the requirements of different systems and different models of batteries. If the magnet is a ferromagnet, the magnetic material can be iron, cobalt, nickel and their alloys.

[0043] It can be seen that the two current collecting parts of the current collecting assembly provided in the embodiment of the utility model are connected through magnetism, which can reduce the power loss of the battery (that is, reducing the internal resistance of the battery can reduce the energy loss) while ensuring the current capacity of the battery in daily use; at the same time, the current collecting assembly can also be melted or disconnected in time. When the battery is short-circuited, the temperature of the current collecting assembly continues to rise. When the temperature rises to the preset temperature, it exceeds the Curie temperature of the magnet, the magnet loses its magnetic force, and the first current collecting part 1 is disconnected from the second current collecting part 2, so that the battery is interrupted to ensure the safety of the battery; or the part of the first current collecting part 1 originally connected to the second current collecting part 2 is separated due to the current conduction area, the resistance value instantly increases, and the temperature rise is accelerated, so that the current collecting assembly can be melted before fire and explosion, so that the entire battery current is disconnected to ensure the safety of the battery.

[0044] Example 1

[0045] When implementing it, Figures 1 to 6As shown, the first current collector 1 includes a pole connection part, a middle part and a pole lug connection part connected in sequence, the pole connection part connects the pole, the pole lug connection part connects the pole lug, and the middle part connects at least one second current collector 2. In the case of a battery short circuit, the temperature of the current collector assembly continues to rise. When the temperature rises to a preset temperature, it exceeds the Curie temperature of the magnet, and the magnet loses its magnetic force. The part of the first current collector 1 originally connected to the second current collector 2 has a reduced current conduction area and a larger resistance value due to the separation of the two current collectors, and the temperature rise is accelerated, so that the current collector assembly can be quickly melted, so that the entire battery current is disconnected to ensure the safety of the battery.

[0046] In a specific implementation, a mounting hole for installing at least one second current collector 2 is provided in the middle portion. For example, the second current collector 2 is provided with one, and the middle portion is provided with a mounting hole for installing a second current collector 2. It can be understood that when the internal temperature of the battery reaches a preset temperature, the second current collector 2 is separated from the first current collector 1. At this time, since the first current collector 1 is provided with a mounting hole in the middle portion, the thickness of the middle portion where the mounting hole is provided is smaller than the thickness of other areas. Then, the cross-sectional area of ​​the position where the mounting hole is provided in the middle portion is smaller than the cross-sectional area of ​​other areas, that is, the resistance of the position where the mounting hole is provided in the middle portion is greater than the resistance of other parts. The position where the mounting hole is provided in the middle portion generates more heat than other parts, and is the first to fuse, thereby cutting off the current path. In addition, the depth of the mounting hole may be smaller than the thickness of the second current collector 2, see for details. Figure 5 The depth of the mounting hole may also be equal to the thickness of the second current collecting member 2, see Figure 1 ; but not limited to this, the middle part may not be provided with a mounting hole, that is, the projections of the second current collecting member 2 and the first current collecting member 1 in a direction perpendicular to the thickness direction do not overlap, see Figure 6 It can be understood that when the temperature inside the battery reaches the preset temperature, the second current collector 2 is separated from the first current collector 1. At this time, the thickness of the middle part of the first current collector 1 is equal to the thickness of other parts. Notches, through holes, etc. can be set on both sides of the middle part to make the cross-sectional area of ​​the middle part smaller than the cross-sectional area of ​​other parts, so that the resistance of the middle part is greater than the resistance of other parts, and the current can be cut off first. In the plane perpendicular to the thickness direction, the size of the mounting hole is larger than the size of the second current collector 2, and can also be equal to the size of the second current collector 2 (see Figure 2 ), that is, the mounting hole only needs to be able to accommodate the second current collecting member 2, and its specific size can be specifically designed by technicians in this field according to actual needs.

[0047] In a specific implementation, one of the first current collecting part 1 and the second current collecting part 2 is a magnet, and the other is magnetically connected to the magnet through a connecting member. When the first current collecting part 1 is a magnet, the second current collecting part 2 is magnetically connected to the first current collecting part 1 through a connecting member; when the second current collecting part 2 is a magnet, the first current collecting part 1 is magnetically connected to the second current collecting part 2 through a connecting member. It should be noted that the connecting member can be a magnet or a magnetic material.

[0048] In specific implementation, the other side facing away from the magnet is provided with a first slot for placing the connector. When the first current collector 1 is a magnet, the second current collector 2 is provided with a first slot for placing the connector on the side facing away from the first current collector 1; when the second current collector 2 is a magnet, the first current collector 1 is provided with a first slot for placing the connector on the side facing away from the second current collector 2. The first slot is a through hole or a blind hole. When the first slot is a through hole, the side wall of the through hole is adapted to the shape of the outer wall of the connector, and the cross-sectional area of ​​the end of the connector facing away from the magnet is larger than the cross-sectional area close to the end of the magnet, so as to facilitate the connector to engage with the first slot, but it is not limited to this. The side wall of the through hole may not be adapted to the shape of the outer wall of the connector, as long as the end of the connector facing away from the magnet can engage with the first slot. When the first slot is a blind hole, the connector partially or completely covers the first slot. The depth of the blind hole can be equal to the thickness of the connector, or the depth of the blind hole can be less than the thickness of the connector, or the depth of the blind hole can be greater than the thickness of the connector. However, it is not limited to this. The first slot for placing the connector may not be provided on the side of the other away from the magnet, that is, the connector can be directly placed on the surface of the other away from the magnet. It should be noted that the specific number of connectors only needs to meet the magnetic connection of the first current collector 1 and the second current collector 2 and meet the current capacity of the battery operation. Those skilled in the art can make specific designs according to actual needs.

[0049] In a specific implementation, magnets are provided on both the first current collecting part 1 and the second current collecting part 2, which are the first magnet 3 and the second magnet 4 respectively; a second slot 11 for placing the first magnet 3 is provided on the surface of the first current collecting part 1 facing away from the second current collecting part 2; and / or a third slot 21 for placing the second magnet 4 is provided on the side of the second current collecting part 2 facing away from the first current collecting part 1. That is, the connection between the first current collecting part 1 and the second current collecting part 2 is achieved through the magnetic connection between the first magnet 3 and the second magnet 4. When the first current collecting part 1 is not provided with the second slot 11 and the second current collecting part 2 is not provided with the third slot 21, the first magnet 3 is located on the side surface of the first current collecting part 1 facing away from the second current collecting part 2, and the second magnet 4 is located on the side surface of the second current collecting part 2 facing away from the first current collecting part 1; or, when the first current collecting part 1 is not provided with the second slot 11 and the second current collecting part 2 is provided with the third slot 21, the first magnet 3 is located on the side surface of the first current collecting part 1 facing away from the second current collecting part 2 The second magnet 4 is located in the third slot 21 of the second current collecting part 2; or, when the first current collecting part 1 is provided with the second slot 11 and the second current collecting part 2 is not provided with the third slot 21, the first magnet 3 is located in the second slot 11 of the first current collecting part 1, and the second magnet 4 is located on the side surface of the second current collecting part 2 facing away from the first current collecting part 1; or, when the first current collecting part 1 is provided with the second slot 11 and the second current collecting part 2 is provided with the third slot 21, the first magnet 3 is located in the second slot 11 of the first current collecting part 1, and the second magnet 4 is located in the third slot 21 of the second current collecting part 2.

[0050] It should be noted that the second slot 11 is a through hole or a blind hole. When the second slot 11 is a through hole, the side wall of the through hole is adapted to the shape of the outer wall of the first magnet 3, and the cross-sectional area of ​​the end of the first magnet 3 away from the second current collector 2 is larger than the cross-sectional area of ​​the end close to the second current collector 2, so that the first magnet 3 is convenient for engaging with the second slot 11, but it is not limited to this. The side wall of the through hole may not be adapted to the shape of the outer wall of the first magnet 3, as long as the end of the first magnet 3 away from the second magnet 4 can be engaged with the first current collector 1; when the second slot 11 is a blind hole, the first magnet 3 partially or completely covers the second slot 11. The hole depth of the blind hole can be equal to the thickness of the first magnet 3, or the hole depth of the blind hole can be less than the thickness of the first magnet 3, or the depth of the blind hole can be greater than the thickness of the first magnet 3. Similarly, the third slot 21 is a through hole or a blind hole. When the third slot 21 is a through hole, the side wall of the through hole is adapted to the shape of the outer wall of the second magnet 4, and the cross-sectional area of ​​the end of the second magnet 4 away from the first current collector 1 is larger than the cross-sectional area of ​​the end close to the first current collector 1, so that the second magnet 4 is convenient for engaging with the third slot 21, but it is not limited to this. The side wall of the through hole may not be adapted to the shape of the outer wall of the second magnet 4, as long as the end of the second magnet 4 away from the first magnet 3 can be engaged with the second current collector 2; when the third slot 21 is a blind hole, the second magnet 4 partially or completely covers the third slot 21. The hole depth of the blind hole can be equal to the thickness of the second magnet 4, or the hole depth of the blind hole can be less than the thickness of the second magnet 4, or the hole depth of the blind hole can be greater than the thickness of the second magnet 4. In addition, three first magnets 3 and second magnets 4 are respectively provided, but not limited thereto. The number of first magnets 3 and second magnets 4 only needs to meet the magnetic connection between the first current collector 1 and the second current collector 2 and the current capacity of the battery operation. Technical personnel in this field can make specific designs according to actual needs.

[0051] In specific implementation, during the production process, the first current collector 1 is first electrically connected to the pole ear and the pole respectively, and after this process is completed and cooled, the first magnet 3, the second magnet 4 and the second current collector 2 are connected to the first current collector 1; the first current collector 1 and the second current collector 2 can also be connected first and then electrically connected, but care must be taken to prevent the magnet from losing its magnetism due to excessive temperature during welding, and to avoid the welding position from affecting the magnet.

[0052] In specific implementation, the shape, plane size and thickness of the first current collector 1 can be changed according to the requirements of the current flow capacity, that is, it is necessary to meet the current flow requirements when the first current collector 1 and the second current collector 2 are bonded together. After the second current collector 2 is separated, the weak point (that is, the middle part) of the first current collector 1 can be fused in time.

[0053] The present utility model embodiment provides a battery, including the above-mentioned current collecting assembly, the current collecting assembly electrically connects the pole ear and the pole terminal to realize current flow. It should be noted that the connection position of the first current collecting member 1 and the second current collecting member 2 cannot interfere with the welding process and other processes in the subsequent battery preparation process.

[0054] It can be seen that the two current collectors in the battery provided by the embodiment of the utility model are connected magnetically, which can reduce the power loss of the battery (that is, reducing the internal resistance of the battery can reduce the energy loss) while ensuring the current capacity of the battery in daily use; at the same time, the current collecting component can also be melted or disconnected in time. When the battery is short-circuited, the temperature of the current collecting component continues to rise. When the temperature rises to the preset temperature, it exceeds the Curie temperature of the magnet, the magnet loses its magnetic force, and the first current collector 1 is disconnected from the second current collector 2, so that the battery is interrupted to ensure the safety of the battery; or the resistance of the part of the first current collector 1 originally connected to the second current collector 2 becomes larger instantly, and the temperature rise is accelerated, so that the current collecting component can be melted before fire and explosion, so that the entire battery current is disconnected to ensure the safety of the battery.

[0055] An embodiment of the utility model provides an electrical device, comprising the above-mentioned battery.

[0056] There is no particular limitation on the electrical equipment of the present invention, and it may include, but is not limited to: laptop computers, pen-input computers, mobile computers, e-book players, portable phones, portable fax machines, portable copiers, portable printers, head-mounted stereo headphones, video recorders, LCD televisions, portable cleaners, portable CD players, mini CDs, transceivers, electronic notepads, calculators, memory cards, portable recorders, radios, backup power supplies, motors, cars, motorcycles, power-assisted bicycles, bicycles, lighting fixtures, toys, game consoles, clocks, power tools, flashlights, cameras, large household batteries and lithium-ion capacitors, etc.

[0057] Example 2

[0058] like Figure 7-Figure 9 As shown, the second embodiment of the present invention provides a current collecting assembly. The difference between the second embodiment of the present invention and the first embodiment is that:

[0059] In a specific implementation, two second current collecting members 2 are provided. The second current collecting members 2 may not fill the entire mounting hole, as long as the corresponding flow capacity is met.

[0060] For specific implementation, see Figure 7, the two second current collecting parts 2 are respectively provided with a third slot 21 for placing the second magnet 4, and the first current collecting part 1 is provided with two first magnets 3, but not limited to this, the number of the second magnets 4 on the second current collecting part 2 and the number of the first magnets 3 on the first current collecting part 1 can be specifically designed by technical personnel in this field according to actual needs.

[0061] Exemplary Embodiment Three

[0062] like Fig.10 and Fig.11 As shown, the third embodiment of the present invention provides a current collecting assembly. The difference between the third embodiment of the present invention and the first embodiment is that:

[0063] In specific implementation, the first current collector 1 includes a first body part and a first connection part, the first body part is connected to the pole; the second current collector 2 includes a second body part and a second connection part, the second body part is connected to the pole ear; along the thickness direction, the first connection part overlaps at least part of the second connection part, ensuring that the first current collector 1 and the second current collector 2 can be magnetically connected. In the case of a battery short circuit, the temperature of the current collector assembly continues to rise. When the temperature rises to a preset temperature, it exceeds the Curie temperature of the magnet, the magnet loses its magnetic force, and the first current collector 1 is disconnected from the second current collector 2, so that the battery is interrupted to ensure the safety of the battery.

[0064] In a specific implementation, the sum of the thickness of the first connection part and the second connection part is greater than or equal to the thickness of the first main body part and greater than or equal to the thickness of the second main body part, which can ensure the current capacity of the battery during normal operation without increasing the internal resistance. The sum of the thickness of the first connection part and the second connection part is equal to the thickness of the first main body part and equal to the thickness of the second main body part, see Fig.10 ; or the sum of the thickness of the first connecting portion and the second connecting portion is greater than the thickness of the first main body portion and greater than the thickness of the second main body portion, see Fig.11 .

[0065] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0066] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0067] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A current collecting assembly, characterized in that: include: A first current collecting member (1); at least one second current collecting member (2) is arranged on a side surface of the first current collecting member (1), at least one of the first current collecting member (1) and the at least one second current collecting member (2) is provided with a magnet, and the first current collecting member (1) and the at least one second current collecting member (2) are magnetically connected via the magnet; Wherein, at a preset temperature, the magnet loses its magnetic force so that the first current collecting member (1) and the at least one second current collecting member (2) are disconnected from each other.

2. The current collecting assembly according to claim 1, characterized in that: The first current collector (1) comprises a pole connecting portion, an intermediate portion and a pole lug connecting portion which are connected in sequence, the pole connecting portion is connected to the pole, the pole lug connecting portion is connected to the pole lug, and the intermediate portion is connected to the at least one second current collector (2).

3. The current collecting assembly according to claim 2, characterized in that: The middle portion is provided with a mounting hole for mounting the at least one second current collecting member (2).

4. The current collecting assembly according to claim 1, characterized in that: The first current collector (1) comprises a first main body portion and a first connecting portion, wherein the first main body portion is connected to the pole; The second current collector (2) comprises a second body portion and a second connecting portion, wherein the second body portion is connected to the electrode lug; Along the thickness direction, the first connection portion at least partially overlaps with the second connection portion.

5. The current collecting assembly according to claim 4, characterized in that: The sum of the thicknesses of the first connecting portion and the second connecting portion is greater than or equal to the thickness of the first main body portion and greater than or equal to the thickness of the second main body portion.

6. The current collecting assembly according to claim 1, characterized in that: One of the first current collecting member (1) and the second current collecting member (2) is a magnet, and the other is magnetically connected to the magnet via a connecting member.

7. The current collecting assembly according to claim 6, characterized in that: A first slot for placing the connecting member is formed on a side of the other member facing away from the magnet.

8. The current collecting assembly according to claim 1, characterized in that: The first current collecting member (1) and the second current collecting member (2) are both provided with magnets, which are respectively a first magnet (3) and a second magnet (4); A second slot (11) for accommodating the first magnet (3) is provided on a surface of the first current collecting member (1) facing away from the second current collecting member (2); And / or, a third slot (21) for accommodating the second magnet (4) is provided on a side of the second current collecting member (2) facing away from the first current collecting member (1).

9. A battery, characterized in that: The present invention comprises the current collecting assembly described in any one of claims 1 to 8.

10. An electrical device, characterized in that: A battery comprising the battery of claim 9.

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