Current collecting assembly, battery, battery pack, and electric device

Abstract

The embodiments of the present application relate to the technical field of batteries. Disclosed are a current collecting assembly, a battery, a battery pack and an electric device. The current collecting assembly comprises a current collecting disk and a flow guide bridge, wherein the current collecting disk is configured to be connected to a tab of a battery; the flow guide bridge is arranged on the current collecting disk, and part of the flow guide bridge protrudes away from the current collecting disk to form a buffer platform, which is configured to be electrically connected to a terminal post of the battery; and the flow guide bridge is further provided with a connecting portion, by means of which the flow guide bridge is connected to the current collecting disk.

Description

Current collecting assembly, battery, battery pack and electric device

[0001] The present application claims priority to the Chinese patent application No. 202411082228.X, filed on August 08, 2024, and entitled "Current collecting assembly, battery, battery pack and electric device", the whole content of which is incorporated herein by reference. TECHNICAL FIELD

[0002] Embodiments of the present application relate to the technical field of battery, in particular to a current collecting assembly, a battery, a battery pack and an electric device. BACKGROUND

[0003] With the continuous progress of battery technology and the growing market demand, the performance of batteries in new energy battery vehicles is increasingly concerned, and the energy density and safety of the battery have become important indicators to measure the performance of the battery.

[0004] However, the conventional cylindrical battery uses rivets to fix the pole column, and the current collecting disc and the current conducting bridge are integrally arranged, and the current conducting bridge needs to be connected with the pole column after being bent and covered. The thickness and width of the current conducting bridge are increased during the bending process, which will affect the current conducting capacity of the current conducting bridge. In addition, since the pole column needs to cooperate with the rivet, enough space needs to be left for the explosion-proof valve and the liquid injection port, and the size limitation of the pole column will also affect the contact area with the battery cell, thereby affecting the overall performance of the battery. SUMMARY

[0005] Embodiments of the present application provide a current collecting assembly, a battery, a battery pack and an electric device, wherein the current collecting assembly comprises a current conducting bridge and a current collecting disc, the current conducting bridge and the current collecting disc are designed separately, the current conducting bridge is connected with the current collecting disc through a connecting part to realize bidirectional current conducting, the problem that the current collecting disc with the current conducting bridge needs to be bent and covered is solved, the assembly process is simplified, and the performance and reliability of the assembly are improved.

[0006] Embodiments of the present application provide the following technical solutions to solve the above technical problems:

[0007] Firstly, the present application provides a current collecting assembly, comprising:

[0008] a current collecting disc, the current collecting disc is used to be connected with the tab of the battery;

[0009] a current conducting bridge, the current conducting bridge is arranged on the current collecting disc, part of the current conducting bridge is protruded from the current collecting disc to form a buffer platform, the buffer platform is used to be electrically connected with the pole column of the battery, the current conducting bridge further has a connecting part, and the current conducting bridge is connected with the current collecting disc through the connecting part.

[0010] The application embodiment has the beneficial effects that: the current collection assembly provided by the application embodiment comprises a current collection disc and a flow guide bridge, the current collection disc is used to be connected with the tab of a battery, the flow guide bridge is arranged on the current collection disc, a part of the flow guide bridge is raised away from the current collection disc to form a buffer platform, the buffer platform is used to be electrically connected with the pole of the battery, the flow guide bridge further has a connecting part, and the flow guide bridge is connected with the current collection disc through the connecting part. In this way, the current collection disc is closely connected with the tab of the battery, the flow guide bridge arranged on the current collection disc is connected with the pole of the battery, and bidirectional flow guiding is realized. The area of the flow guide bridge raised away from the current collection disc forms the buffer platform, which is convenient for relieving the assembly of the battery cover plate after the assembly of the battery cell, and is beneficial to absorbing the height tolerance of the battery cell inside the battery. Not only is the assembly process simplified, but also the flow guiding effect of the battery is improved, and the overall stability of the battery system is enhanced.

[0011] In a possible implementation, the buffer platform of the flow guide bridge is provided with a first opening hole, and the first opening hole is arranged opposite to a center hole on the battery cell.

[0012] In a possible implementation, the current collection disc is provided with a second opening hole, the second opening hole is located below the first opening hole, and the first opening hole, the second opening hole and the center hole on the battery cell are arranged opposite to each other. In this way, the first opening hole, the second opening hole and the center hole form a vertical channel, which is beneficial to the flow of the electrolyte. When the electrolyte is injected into the cavity through the third opening (liquid injection port) on the second pole, the electrolyte can flow into the cavity of the shell through the first opening hole, the second opening hole and the center hole in sequence and react with the battery cell. Alternatively, when a short circuit occurs in the battery, the internal pressure of the battery rises sharply, and the internal gas can be discharged from the cavity of the shell through the vertically arranged second opening hole and the first opening hole.

[0013] In a possible implementation, the current collection disc is provided with a plurality of third opening holes, and the plurality of third opening holes are located on the side of the second opening hole. In a possible implementation, the electrolyte can not only enter the cavity of the shell through the second opening hole on the current collection disc, but also enter through the third opening hole, so as to ensure that the electrolyte can fully flow into the cavity of the shell and fully react with the battery cell. In another possible implementation, the gas generated by the short circuit in the battery can cause the pressure in the cavity of the shell to rise sharply, and the second opening hole and the third opening hole arranged thereon are beneficial to the rapid discharge of the gas, so as to effectively release the internal pressure of the shell and prevent the shell from being broken or exploded.

[0014] In a possible implementation, the projection of the connecting portion towards the current collecting plate is staggered with the third opening. In this way, the connecting portion of the flow guide bridge can avoid interfering with the function of the third opening on the current collecting plate, ensuring that the third opening can smoothly allow electrolyte to flow into the cavity of the shell, or the third opening can ensure that the gas in the internal cavity of the shell is discharged, or the heat in the shell is dissipated.

[0015] In a possible implementation, the current collecting plate is integrally formed with a protrusion protruding towards the tab, and the tab is connected to the current collecting plate through the protrusion. In this way, the protrusion of the current collecting plate towards the battery cell can increase the structural strength of the current collecting plate, and the current collecting plate can be more stable during use, reducing the possibility of deformation and damage. The contact between the tab and the current collecting plate is also more close and uniform through the protrusion, which is conducive to improving the quality and efficiency of welding and ensuring smooth transmission of current.

[0016] In a possible implementation, the current collecting plate has a bending portion on the outer edge thereof, the bending portion is bent towards the flow guide bridge, and one end of the connecting portion abuts against the bending portion. In this way, the connecting portion of the flow guide bridge and the connecting surface of the current collecting plate can be determined through the bending portion on the current collecting plate. The bending portion not only provides a clear positioning point for the flow guide bridge, but also prevents possible incorrect installation or direction confusion during assembly of the flow guide bridge and the current collecting plate, simplifies the assembly process, improves production efficiency, and ensures consistency and reliability of each battery.

[0017] In a possible implementation, the height of the bending portion is h, and 0.3 mm≤h≤3.0 mm.

[0018] In a possible implementation, the bending portion and the protruding protrusion on the current collecting plate are staggered in the circumferential direction of the current collecting plate. In this way, the bending portion and the protrusion on the current collecting plate can be ensured not to interfere with each other, and the spatial layout and functional distribution of the current collecting plate can be optimized, thereby improving the performance and reliability of the battery.

[0019] Secondly, the embodiments of the present application provide a battery, which comprises:

[0020] a shell, the shell having a cavity therein;

[0021] a cover plate assembly, the cover plate assembly comprising a cover plate and a pole, the pole being connected to the cover plate and being insulated from the cover plate, and the cover plate assembly being used to seal the cavity;

[0022] a battery cell, the battery cell being located in the cavity, and at least one end of the battery cell being provided with a tab;

[0023] And the current collecting assembly is located between the cover plate assembly and the battery cell, a current collecting plate of the current collecting assembly is electrically connected with the tab at one end of the battery cell, and a current conducting bridge of the current collecting assembly is electrically connected with the pole.

[0024] In a possible implementation, the pole includes a first pole and a second pole, the first pole and the second pole are respectively arranged on two sides of the cover plate, the first pole is located on a side of the cover plate away from the cavity, the second pole is located on a side of the cover plate facing the cavity, a bottom surface of the second pole abuts against a buffer platform of the current conducting bridge, and the first pole and the second pole are connected by at least two connecting pieces. In this way, the second pole arranged on one side of the cover plate is electrically connected with the tab of the battery cell through the current collecting assembly, and is used for transmitting the current of the battery cell. The first pole arranged on the other side of the cover plate is connected with the second pole through the connecting piece, and stable connection and current transmission between the first pole and the second pole are realized. The first pole can be connected with an external circuit, or the first pole is connected with an external load, and is responsible for transmitting the current of the battery cell.

[0025] In a possible implementation, a first opening is formed in the first pole, a second opening is formed in the cover plate and faces the first opening, the first opening and the second opening form a cavity, and a partial region of the second pole is exposed at the cavity. In this way, the cavity is conducive to laser penetration welding from the outside of the battery to the inside of the cavity after the top cover and the shell are welded, and laser penetration welding is performed on the partial region of the second pole exposed in the cavity, so that full radial welding is formed between the tab of the battery cell and the current collecting plate.

[0026] In a possible implementation, the second pole has a welding region, and the welding region is exposed at the cavity. In this way, after the shell and the cover plate of the battery are welded, a part of the bottom surface of the second pole abuts against the top surface of the buffer platform on the current conducting bridge and compresses the buffer platform on the current conducting bridge, the distance between the welding region on the second pole and the tab is further shortened, laser penetration welding is performed on the welding region of the second pole exposed in the cavity from the first opening of the first pole, and full radial welding is formed between the tab and the current collecting plate, so that current conducting is realized.

[0027] In a possible implementation, a groove is formed in the welding region of the second pole by integral stamping, the groove is connected with the cavity, and the shortest distance between the groove bottom and the bottom surface of the second pole is d, and 0.3mm≤d≤1.3mm.

[0028] In a possible implementation, the second pole post is provided with a third opening, the third opening is in communication with the cavity through the first opening of the flow guide bridge and the second opening of the current collector plate in sequence, and the third opening is used for mounting an explosion-proof valve; in this way, when a short circuit occurs inside the battery in an extreme case, the internal pressure of the battery rapidly rises, the explosion-proof valve located at the center of the second pole post can rapidly respond and open to effectively release the internal pressure of the cavity, and the battery shell is prevented from being broken or exploded. Alternatively, the third opening is a liquid injection port, electrolyte is injected into the cavity through the third opening, and the liquid injection port is provided with a piston, and the piston is used for sealing the liquid injection port.

[0029] In a possible implementation, the third opening is arranged opposite to the first opening of the flow guide bridge, the second opening of the current collector plate, and the center hole of the battery cell. In this way, the third opening, the first opening of the flow guide bridge, the second opening of the current collector plate, and the center hole of the battery cell arranged opposite to each other form a vertical channel, which is beneficial to the flow of electrolyte to the cavity inside the shell, promotes the full contact of electrolyte with the battery cell, and causes a reaction.

[0030] In a possible implementation, the cover plate assembly further includes a pole post cover and a protection sheet, the pole post cover is located on the first opening of the first pole post, the pole post cover is provided with a fourth opening, and the protection sheet is located on the fourth opening and used for sealing the cavity. In this way, the pole post cover is tightly combined with the first opening of the first pole post and is connected through welding, so that the connection between the first pole post and other components inside the battery is safe and reliable. The protection sheet is arranged on the fourth opening of the pole post cover to seal the cavity, so that moisture, dust or other impurities in the external environment are prevented from entering the cavity.

[0031] In a possible implementation, an insulating member is further included, the insulating member is arranged between the first pole post and the cover plate and between the second pole post and the cover plate, and the first pole post and the cover plate and the second pole post and the cover plate are insulated through the insulating member. In this way, the insulating member is used to realize the insulation between the first pole post and the cover plate and between the second pole post and the cover plate, so that current short circuit or leakage is avoided, and the battery can be stably and safely operated.

[0032] In a possible implementation, the insulating member is provided with a through hole, and the cavity is formed through the through hole. In this way, the through hole of the insulating member, the first opening of the first pole post, and the second opening of the cover plate jointly form the cavity, which not only ensures the insulation between the first pole post and the cover plate and between the second pole post and the cover plate, but also is beneficial to the convenience of laser external penetration welding of the tab and the current collector plate.

[0033] In a possible implementation, a sleeve is further included outside the connecting piece, and the connecting piece is insulated from the cover plate by the sleeve. In this way, the sleeve can achieve insulation between the connecting piece and the cover plate, and can also provide mechanical protection for the connecting piece. When the battery is subjected to external impact or vibration during use or transportation, the sleeve can reduce the influence of external factors on the connecting piece, and ensure that the connecting piece can stably connect the first pole and the second pole.

[0034] In a third part, the embodiments of the present application further provide a battery pack, comprising:

[0035] The battery described above is a cylindrical battery.

[0036] In a fourth part, the embodiments of the present application further provide a power consumption device, comprising:

[0037] The power consumption device, and the battery pack described above or the battery described above, wherein the battery pack or the battery is configured to provide electric energy for the power consumption device.

[0038] In addition to the technical problems solved by the present application, the technical features constituting the technical solutions, and the beneficial effects brought by these technical features described above, the other technical problems solved by the current application, the other technical features included in the technical solutions, and the beneficial effects brought by these technical features will be further described in detail in the specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the description of the embodiments of the present application or the prior art will be briefly introduced below. Obviously, the drawings in the following description are only a part of the embodiments of the present application, and these drawings and the written description are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. Those skilled in the art can obtain other drawings without creative labor based on these drawings.

[0040] FIG. 1 is a structural schematic diagram of a current collecting assembly of a battery provided by the embodiments of the present application;

[0041] FIG. 2 is a structural schematic diagram of a flow guide bridge provided by the embodiments of the present application;

[0042] FIG. 3 is a structural schematic diagram of a current collecting disc provided by the embodiments of the present application;

[0043] FIG. 4 is a structural schematic diagram of another flow guide bridge provided by the embodiments of the present application;

[0044] Fig. 5 is a structural schematic diagram of another current collecting plate provided by the embodiment of the present application;

[0045] Fig. 6 is a sectional view of one end of a battery provided with an explosion-proof valve according to the embodiment of the present application;

[0046] Fig. 7 is a sectional view of one end of a battery provided with a liquid injection port according to the embodiment of the present application;

[0047] Fig. 8 is an exploded view of a battery provided with an explosion-proof valve according to the embodiment of the present application;

[0048] Fig. 9 is a top view of a second pole of a battery according to the embodiment of the present application;

[0049] Fig. 10 is a sectional view of a second pole of a battery according to the embodiment of the present application.

[0050] Legend: 100 - shell; 110 - cavity; 200 - cover plate assembly; 210 - cover plate; 211 - second opening; 220 - pole cover; 221 - fourth opening; 230 - protection sheet; 300 - battery cell; 310 - center hole; 400 - current collecting assembly; 410 - flow guide bridge; 411 - buffer platform; 412 - connecting part; 413 - first opening; 420 - current collecting plate; 421 - convex; 422 - bending part; 423 - second opening; 424 - third opening; 500 - pole; 510 - first pole; 511 - first opening; 520 - second pole; 521 - third opening; 522 - welding area; 523 - groove; 530 - cavity; 540 - explosion-proof valve; 550 - piston; 600 - tab; 700 - insulating part; 710 - through hole; 800 - connecting part; 810 - sleeve; 820 - through hole. DETAILED DESCRIPTION

[0051] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0052] The embodiments of the present application provide a kind of electric equipment, electric equipment includes electric device and battery pack or battery, battery pack or battery provides electric energy for electric device.For example, electric equipment can be a kind of vehicle or energy storage device, when electric equipment is a kind of vehicle, vehicle can be electric vehicle, electric car, fuel vehicle, also be oil-electric hybrid car.Electric device can be electric motor, control system, lighting system etc.When electric equipment is a kind of energy storage device, electric device can be inverter, controller etc.Battery pack can include multiple batteries, in the embodiments of the present application, battery is cylindrical battery.And multiple batteries are connected by certain connection mode and control system to realize the storage and output of electric energy, the electric energy provided by battery pack or battery can be provided for electric device, to meet the normal operation of equipment.

[0053] The embodiments of the present application provide a kind of current collection assembly 400 of battery, as shown in Figure 6 and Figure 7, current collection assembly 400 includes current collection disc 420 and flow guide bridge 410.Current collection disc 420 is used to connect with the tab 600 of battery.Flow guide bridge 410 is arranged on current collection disc 420, part of the area of flow guide bridge 410 is raised to form buffer table 411 away from current collection disc 420, buffer table 411 is used to be electrically connected with the pole 500 of battery, flow guide bridge 410 also has connecting part 412, flow guide bridge 410 is connected with current collection disc 420 by connecting part 412.

[0054] One side of current collection disc 420 is connected with the tab 600 of battery, responsible for collecting and distributing current.The other side of current collection disc 420 is electrically connected with the pole 500 of battery through buffer table 411 on flow guide bridge 410.Current collection disc 420 and flow guide bridge 410 are welded through connecting part 412, realize closely connected to ensure the continuous conduction of battery current, thereby improve current conduction efficiency.And, appropriate connecting part 412 area helps to improve the heat conduction effect between flow guide bridge 410 and current collection disc 420, reduce the working temperature of battery.Flow guide bridge 410 and current collection disc 420 can be made of aluminum material, copper material, but not limited to the above metal materials, for example, it can also be made of stainless steel or other alloy materials, not described here, the material of flow guide bridge 410 and current collection disc 420 can be selected according to actual working condition.

[0055] The central portion of the guide bridge 410 has a raised buffer platform 411 facing away from the collector plate 420. As shown in Figure 2, in one possible implementation, the guide bridge 410 has a straight "I" shape, with a raised buffer platform 411 facing away from the collector plate 420 in the central region of the straight "I" shape. The buffer platform 411 is rectangular. As shown in Figure 4, in another possible implementation, the guide bridge 410 has a cross shape, with a raised buffer platform 411 facing away from the collector plate 420 in the central region of the cross shape. The buffer platform is roughly circular. It should be noted that the guide bridge 410 can be either a straight "I" shape or a cross shape, but is not limited to these two shapes. For example, it can also be a circular structure or other shapes. The shape of the guide bridge 410 can be adjusted according to the actual operating conditions of the battery. In this embodiment, the description mainly focuses on the straight "I" shape guide bridge 410.

[0056] Understandably, during the welding of the outer casing 100 and the cover plate 210 after the battery cell 300 is assembled, the buffer platform 411 on the current guide bridge 410 can absorb the pressure during the assembly process, playing a certain buffering role. By compressing the buffer platform 411, it absorbs the height tolerance of the battery cell 300, protecting the battery terminals 500, battery cell 300, and other internal components from damage. It should be noted that the raised buffer platform 411 on the current guide bridge 410 can be rectangular or circular as described above, but is not limited to the above shapes. For example, it can also be quasi-circular, triangular, trapezoidal, or other shapes.

[0057] The guide bridge 410 is provided with connecting portions 412, which are located around the buffer platform 411. In one possible implementation, when the guide bridge 410 has an "I"-shaped structure, there are two connecting portions 412, located on both sides of the buffer platform 411. In another possible implementation, when the guide bridge 410 has a cross-shaped structure, there are four connecting portions 412, located around the buffer platform 411. The symmetrically arranged connecting portions 412 enable a tight connection between the guide bridge 410 and the current collector 420, ensuring the continuity of current conduction in the battery cell 300, and also allowing the guide bridge 410 to be securely mounted on the current collector 420, preventing it from loosening or falling off. It should be noted that the number and position of the connecting portions 412 on the guide bridge 410 can be either of the two types mentioned above, but are not limited to these two types. For example, the connecting portions 412 can also be asymmetrically arranged, or an odd number of symmetrically arranged. Alternatively, when the guide bridge 410 has a disc-shaped structure, the annular area around the buffer platform 411 on the guide bridge 410 can be the connecting part 412.

[0058] It can be understood that the greater the area of the connecting portion 412, the greater the contact area between the flow guide bridge 410 and the current collector plate 420, and the better the heat conduction effect between the flow guide bridge 410 and the current collector plate 420 when heat is generated during the operation of the battery. Moreover, the conduction efficiency of the current can be improved, the resistance and heat accumulation can be reduced, thereby being beneficial to the overall performance of the battery system. However, as the contact area increases, the complexity of the internal design of the battery increases, the manufacturing cost increases, and the difficulty of installation and maintenance increases. The size of the connecting portion 412 on the flow guide bridge 410 can be adjusted and designed according to the actual working conditions of the battery.

[0059] In some embodiments of the present application, as shown in FIGS. 2-5, the buffer table 411 of the flow guide bridge 410 is provided with a first opening 413, and the first opening 413 is arranged opposite to the center hole 310 on the battery cell. The current collector plate 420 is provided with a second opening 423, and the second opening 423 is located below the first opening 413, and the first opening 413, the second opening 423 and the center hole 310 on the battery cell 300 are arranged opposite to each other. In this way, the first opening 413, the second opening 423 and the center hole 310 form a vertical channel, which is beneficial to the flow of electrolyte. When the electrolyte is injected into the cavity 110 through the third opening 521 (liquid injection port) on the second pole 520, the electrolyte can flow into the cavity 110 of the shell 100 through the first opening 413, the second opening 423 and the center hole 310 in sequence, and react with the battery cell 300. Alternatively, when a short circuit occurs in the battery, the internal pressure of the battery rises sharply, and the internal gas can be discharged from the cavity 110 of the shell 100 through the vertically arranged second opening 423 and first opening 413. The details will be explained later.

[0060] In the embodiments of the present application, a cylindrical battery is mainly described. The battery cell 300 in the cylindrical battery is formed by winding sheet materials such as positive electrode sheets, negative electrode sheets and separators, and a center hole 310 is formed at the center position in the winding process. The center hole 310 not only supports the structure of the battery cell 300, but also serves as a channel for electrolyte, thereby improving the performance of the battery. It should be noted that in the examples of the present application, the first opening 413 and the second opening 423 are both circular holes, but are not limited to circular holes. For example, they can also be rectangular holes or other shapes. The shape and size of the first opening 413 and the second opening 423 can be adjusted according to the actual working conditions.

[0061] In some embodiments of the present application, please refer to FIG. 3 and FIG. 5, the current collecting plate 420 is provided with a plurality of third openings 424, and the plurality of third openings 424 are located on the circumferential side of the second openings 423. In this way, in a possible implementation, the electrolyte can not only enter the cavity 110 of the shell 100 through the second openings 423 on the current collecting plate 420, but also enter through the third openings 424, so as to ensure that the electrolyte can fully flow into the cavity 110 of the shell 100 and fully react with the battery cell 300. In another possible implementation, the gas generated by the short circuit in the battery can cause the pressure in the cavity 110 of the shell 100 to rise sharply, and the second openings 423 and the third openings 424 are beneficial to the rapid discharge of the gas, thereby effectively releasing the pressure inside the shell 100 and preventing the shell 100 from being broken or exploded. It can be understood that the battery will generate a certain amount of heat during operation, and the heat can also be discharged from the cavity 110 of the shell 100 in time through the second openings 423 and the third openings 424, thereby ensuring that the battery works at an appropriate temperature.

[0062] In some embodiments of the present application, as shown in FIG. 1, the projection of the connecting portion 412 towards the current collecting plate 420 is staggered with the third openings 424. In this way, the connecting portion 412 of the flow guide bridge 410 can avoid interfering with the function of the third openings 424 on the current collecting plate 420, and ensure that the third openings 424 can smoothly flow the electrolyte into the cavity 110 of the shell 100, or the third openings 424 can ensure the discharge of the gas in the cavity 110 inside the shell 100, or ensure the heat in the shell 100 to be discharged.

[0063] The current collecting assembly 400 provided by the present application is shown in FIG. 2, when the flow guide bridge 410 is in a "one" type structure, the connecting portion 412 has two. The current collecting plate 420 is shown in FIG. 3, and the third openings 424 on the current collecting plate 420 can be provided with six. The flow guide bridge 410 and the current collecting plate 420 are assembled as shown in FIG. 1, and the projection of the connecting portion 412 on the flow guide bridge 410 towards the direction of the shell 100 is staggered with the third openings 424 on the current collecting plate 420.

[0064] Another current collecting assembly 400 provided by the present application is shown in FIG. 4. When the flow guide bridge 410 is in a "cross" structure, the connecting portion 412 has four. The current collecting disc 420 is shown in FIG. 5. The third opening 424 on the current collecting disc 420 can be provided with four. The projection of the connecting portion 412 on the flow guide bridge 410 in the direction of the shell 100 is staggered with the third opening 424. After the flow guide bridge 410 and the current collecting disc 420 are assembled, the connecting portion 412 does not affect the use of the third opening 424. It should be noted that the shapes of the flow guide bridge 410 and the current collecting disc 420 can be the above shapes, but are not limited to the above shapes. When the flow guide bridge 410 and the current collecting disc 420 are assembled, they do not affect the normal use of the third opening 424 and do not affect the function of the third opening 424.

[0065] In some embodiments of the present application, as shown in FIGS. 3, 5 to 7, the current collecting disc 420 is integrally punched to form a protrusion 421 protruding towards the tab 600. The tab 600 is connected to the current collecting disc 420 through the protrusion 421. In this way, the protrusion 421 on the current collecting disc 420 towards the electrode 300 can increase the structural strength of the current collecting disc 420, making the current collecting disc 420 more stable during use and reducing the possibility of deformation and damage. The contact between the tab 600 and the current collecting disc 420 through the protrusion 421 can also be more close and uniform, which is conducive to improving the quality and efficiency of welding and ensuring smooth transmission of current.

[0066] For example, as shown in FIGS. 3 and 5, the protrusion 421 on the current collecting disc 420 is provided with four, and the protrusion 421 has a symmetrical shape. The center of the protrusion 421 is provided with the third opening 424. It should be noted that the shape of the protrusion 421 can be the symmetrical shape shown in the figure, but is not limited to the shape shown in the figure. For example, the protrusion 421 can also be an asymmetrical protrusion 421. The area of the protrusion 421 and the number of the protrusion 421 can be adjusted and changed according to the needs of the battery in actual working conditions.

[0067] In some embodiments of the present application, as shown in FIGS. 3, 5 and 6, the outer edge of the current collecting disc 420 has a bending portion 422. The bending portion 422 is bent towards the flow guide bridge 410, and one end of the connecting portion 412 abuts against the bending portion 422. The height of the bending portion 422 is h, and 0.3mm≤h≤3.0mm. In this way, the connecting portion 412 of the flow guide bridge 410 and the connecting surface of the current collecting disc 420 can be determined by the bending portion 422 on the current collecting disc 420. The bending portion 422 not only provides a clear positioning point for the flow guide bridge 410, but also prevents possible incorrect installation or direction confusion during assembly of the flow guide bridge 410 and the current collecting disc 420. This simplifies the assembly process, improves production efficiency, and ensures the consistency and reliability of each battery.

[0068] It can be understood that when the height h of the bending part 422 is too small, for example, h < 0.3 mm, the bending part 422 cannot provide a stable positioning point for the flow guide bridge 410, which may cause the flow guide bridge 410 to be offset or misaligned during assembly, increasing the difficulty and time of assembly.

[0069] When the height h of the bending part 422 is too large, for example, h > 3.0 mm, the bending part 422 will occupy more space, which may cause the internal layout of the shell 100 to be compact, affecting the installation of other components and the overall size of the battery. The increase in the height of the bending part 422 also increases the material of the current collecting plate 420, resulting in an increase in cost. And the bending part 422 that is too high may cause stress concentration during the charging and discharging process of the battery, which may increase the possibility of damage to the internal structure of the battery.

[0070] In some embodiments of the present application, as shown in FIGS. 2 and 3, and as shown in FIGS. 4 and 5, the bending part 422 and the raised ridge 421 on the current collecting plate 420 are staggered in the circumferential direction of the current collecting plate 420. In this way, it can be ensured that the bending part 422 and the raised ridge 421 on the current collecting plate 420 do not interfere with each other, and the spatial layout and functional distribution of the current collecting plate 420 are optimized, thereby improving the performance and reliability of the battery.

[0071] The embodiments of the present application also provide a battery, as shown in FIGS. 6 and 7, the battery comprising a shell 100, a cover plate assembly 200, a battery cell 300, and the current collecting assembly 400 described above. The shell 100 has a cavity 110 therein, the battery cell 300 is located in the cavity 110, and at least one end of the battery cell 300 is provided with a tab 600. The cover plate assembly 200 comprises a cover plate 210 and a pole 500, the pole 500 is connected to the cover plate 210 and is insulated from the cover plate 210, and the cover plate assembly 200 is used to seal the cavity 110. The current collecting assembly 400 is located between the cover plate assembly 200 and the battery cell 300, the current collecting plate 420 of the current collecting assembly 400 is electrically connected to the tab 600 at one end of the battery cell 300, and the flow guide bridge 410 of the current collecting assembly 400 is electrically connected to the pole 500.

[0072] The shell 100 has a cavity 110 for accommodating the battery cell 300 and other battery components. The two ends of the shell 100 are connected with the cover plate assembly 200, which can protect the battery cell 300 and internal components from mechanical damage caused by external vibration, impact, etc. The cover plate assembly 200 can ensure that the battery cell 300 and internal components work in a sealed environment, effectively preventing electrolyte leakage or external gas and liquid intrusion, thereby ensuring the integrity and stability of the battery internal structure. Among them, the cover plate 210 of the cover plate assembly 200 is used to seal the cavity 110 of the shell 100 to prevent electrolyte leakage and external environment erosion to the battery cell 300. The pole 500 is connected with the cover plate 210, and the pole 500 and the cover plate 210 are insulated to avoid short circuit of the battery and ensure the safety of the battery.

[0073] It should be noted that the cover plate 210 and the shell 100 can be made of aluminum, copper, but are not limited to the above metal materials, for example, stainless steel or other alloy materials can also be used, which will not be described here. The material of the cover plate 210 and the shell 100 can be selected according to the actual working condition.

[0074] The battery cell 300 is used to store and release electrical energy, and the two ends of the battery cell 300 are respectively provided with the tab 600, which is connected with the pole 500 through the current collecting assembly 400. The current collecting assembly 400 ensures good contact and current transmission between the tab 600 of the battery cell 300 and the pole 500, improves the performance and reliability of the battery, so that the pole 500 is electrically connected with the external circuit to realize the power supply function. It should be noted that the current collecting assembly 400 in the example of the present application is expanded in the shape shown in FIGS. 1-3.

[0075] In some embodiments of the present application, as shown in FIGS. 6-8, the pole 500 includes a first pole 510 and a second pole 520, which are respectively arranged on the two sides of the cover plate 210. The first pole 510 is located on the side of the cover plate 210 away from the cavity 110. The second pole 520 is located on the side of the cover plate 210 facing the cavity 110, and the bottom surface of the second pole 520 abuts against the buffer table 411 of the current guide bridge 410. The first pole 510 and the second pole 520 are connected through the connecting piece 800, for example, two, three or four or five, and the example of the present application mainly expands and explains the four connecting pieces 800. The connecting piece 800 penetrates the top cover and the two insulating pieces 700 arranged on the two sides of the top cover in sequence, and connects the first pole 510 and the second pole 520 through the connecting piece 800.

[0076] In this way, the second pole post 520 arranged on one side of the cover plate 210 is electrically connected with the tab 600 of the battery cell 300 through the current collecting assembly 400, and is used for transmitting the current of the battery cell 300. The first pole post 510 arranged on the other side of the cover plate 210 is connected with the second pole post 520 through the connecting piece 800, and realizes the stable connection and current transmission between the first pole post 510 and the second pole post 520. The first pole post 510 can be connected with an external circuit, or the first pole post 510 is connected with an external load, and is responsible for transmitting the current of the battery cell 300.

[0077] It should be noted that, in the embodiment of the present application, the first pole post 510, the second pole post 520 and the connecting piece 800 can be made of aluminum material, copper material, but are not limited to the above metal materials, for example, can also be made of stainless steel or other alloy materials, which will not be described here, and the materials of the first pole post 510, the second pole post 520 and the connecting piece 800 can be selected according to actual working conditions.

[0078] In the embodiment of the present application, the connecting piece 800 can be cold heading or riveting forming, and the diameter of the connecting piece 800 can be between φ1.0-φ5.0mm, for example, can be φ1.5mm, φ3.5mm or φ4.8mm, and the diameter of the connecting piece 800 can also be equal to φ1.0mm or φ5.0mm. It should be noted that the material, number and diameter of the connecting piece 800 can be adjusted according to the actual working condition of the battery overcurrent performance requirement, which will not be described here. It can be understood that when the number and diameter of the connecting piece 800 are larger, the connection stability and current conduction capacity between the first pole post 510 and the second pole post 520 can be further enhanced.

[0079] It can be understood that, as shown in FIG. 8, the first pole post 510, the insulating piece 700, the cover plate 210 and the second pole post 520 are all provided with through holes 820, and the number of the through holes 820 is consistent with the number of the connecting pieces 800. The connecting piece 800 sequentially passes through the through hole 820 on the first pole post 510, the through hole 820 on the insulating piece 700 between the first pole post 510 and the cover plate 210, the through hole 820 on the cover plate 210, the through hole 820 on the insulating piece 700 between the second pole post 520 and the cover plate 210, and the through hole 820 on the second pole post 520, thereby connecting the first pole post 510, the insulating piece 700, the cover plate 210 and the second pole post 520.

[0080] In some embodiments of the present application, as shown in FIG. 8, the first pole column 510 is provided with a first opening 511, the cover plate 210 is provided with a second opening 211 opposite to the first opening 511, the first opening 511 and the second opening 211 form a cavity 530, and a part of the second pole column 520 is exposed at the cavity 530. In this way, the cavity 530 is conducive to laser penetration welding from the outside of the battery to the inside of the cavity 530 after the top cover is welded with the shell 100, and laser penetration welding is performed on the part of the second pole column 520 exposed in the cavity 530, so that full radial welding is formed between the tab 600 of the battery cell 300 and the current collector plate 420.

[0081] The central region of the first pole column 510 is provided with the first opening 511, and the central region of the cover plate 210 is provided with the second opening 211 opposite to the first opening 511. The cavity 530 is formed by the first opening 511 and the second opening 211, so that a part of the second pole column 520 on the side away from the cavity 110 can be exposed in the cavity 530. After the top cover is connected with the shell 100, the cavity 530 provides an operation space for laser penetration welding, so that laser can perform welding work on the part of the second pole column 520 exposed in the cavity 530, realizing welding between the tab 600 of the battery cell 300 and the current collector plate 420, and simplifying the welding process of the tab 600.

[0082] It should be noted that in the example of the present application, the first opening 511 on the first pole column 510 and the second opening 211 on the cover plate 210 are both rectangular, but are not limited to rectangular, for example, can also be circular, circular-like or triangular, and other shapes, and the shape and size of the first opening 511 and the second opening 211 can be adjusted according to actual working conditions.

[0083] It can be understood that the first opening 511 on the first pole column 510 and the second opening 211 on the cover plate 210 are both provided with a first step structure. The step structure on the first pole column 510 is arranged on the inner edge of the first opening 511, and the step structure is arranged on the side of the first pole column 510 away from the cover plate 210, so that the step structure can provide a stable support surface and accurate positioning for the installation of the pole cover 220. The step structure on the cover plate 210 is arranged on the inner edge of the second opening 211, and the step structure is arranged on the side of the cover plate 210 away from the second pole column 520, so that the step structure can provide a stable support surface and accurate positioning for the installation of the insulating piece 700 arranged between the top cover and the first pole column 510.

[0084] In some embodiments of the present application, as shown in FIGS. 8 and 9, the second pole post 520 has a welding area 522 exposed at the cavity 530. In this way, when the shell 100 of the battery is welded with the cover plate 210, the bottom surface of the second pole post 520 is in contact with the top surface of the buffer platform 411 on the flow guide bridge 410, and the buffer platform 411 on the flow guide bridge 410 is compressed, the distance between the welding area 522 on the second pole post 520 and the tab 600 is further shortened, the first opening 511 of the first pole post 510 enters the cavity 530, and the welding area 522 on the second pole post 520 exposed in the cavity 530 is penetrated by laser welding, which is conducive to forming full radial welding between the tab 600 and the current collector plate 420, thereby realizing flow guide.

[0085] In a possible implementation, the second pole post 520 can be formed by stamping a thin plate to form the welding area 522, and the welding area 522 can be in a rectangular, circular, circular-like or other shape, and the size and shape of the welding area 522 can be adjusted according to actual working conditions.

[0086] In some embodiments of the present application, as shown in FIGS. 9 and 10, the second pole post 520 has a recess 523 integrally formed by stamping at the welding area 522, the recess 523 is in communication with the cavity 530, and the shortest distance d between the bottom of the recess 523 and the bottom surface of the second pole post 520 is 0.3mm≤d≤1.3mm.

[0087] In another possible implementation, the welding area 522 on the second pole post 520 can also be formed by stamping and thinning, and the recess 523 is formed by thinning a part of the area on the side of the second pole post 520 facing the cavity 530, and the recess 523 is in communication with the cavity 530. It can be understood that when the shortest distance d between the bottom of the recess 523 and the bottom surface of the second pole post 520 is too small, for example, d<0.3mm, the laser external penetration welding of the tab 600 and the current collector plate 420 can cause excessive concentration of welding heat, increasing the possibility of welding deformation and cracking. When the shortest distance d between the bottom of the recess 523 and the bottom surface of the second pole post 520 is too large, for example, d>3.0mm, the welding effect of the laser external penetration welding of the tab 600 and the current collector plate 420 can be affected, and the possibility of virtual welding or broken welding can occur.

[0088] In some embodiments of the present application, as shown in FIGS. 6-8, the second pole column 520 is provided with a third opening 521, which is in communication with the cavity 110 through the first opening 413 of the flow guide bridge 410 and the second opening 423 of the current collector plate 420 in sequence, and the third opening 521 is arranged opposite to the first opening 413 of the flow guide bridge 410, the second opening 423 of the current collector plate 420, and the central hole 310 of the battery cell 300. The third opening 521 is used to install the explosion-proof valve 540. In this way, when the battery is in an extreme situation and internal short circuit occurs, the internal pressure of the battery rises sharply, and the explosion-proof valve 540 located at the center of the second pole column 520 can quickly respond and open, effectively releasing the internal pressure of the cavity 110, and preventing the battery shell from breaking or exploding. Alternatively, the third opening 521 is a liquid injection port, and electrolyte is injected into the cavity 110 through the third opening 521. The liquid injection port is provided with a piston 550 for sealing the liquid injection port. The vertically arranged third opening 521, the first opening 413 of the flow guide bridge 410, the second opening 423 of the current collector plate 420, and the central hole 310 of the battery cell 300 form a vertical channel, which is conducive to the flow of electrolyte into the cavity 110 of the shell 100, and promotes the full contact and reaction of the electrolyte with the battery cell 300.

[0089] It can be understood that the explosion-proof valve 540 on the conventional battery is arranged at a position deviating from the center of the battery cell 300, which can cause the gas discharge path to be longer and the gas discharge efficiency to be lower. In a possible implementation, the third opening 521 on the second pole column 520 can be used to install the explosion-proof valve 540. The explosion-proof valve 540 is arranged opposite to the first opening 413 of the buffer platform 411 of the flow guide bridge 410, the second opening 423 of the current collector plate 420, and the central hole 310 of the battery cell 300. When internal short circuit and fire occur in the battery, the generated gas can be discharged more quickly through the explosion-proof valve 540 at the center of the second pole column 520, reducing the accumulation of gas in the battery and the possibility of explosion of the battery shell 100. It should be noted that the explosion-proof valve 540 can be obtained in the required shape and size by stamping forming, or the explosion-proof sheet is welded and shaped with the third opening 521 on the second pole column 520. The explosion-proof valve 540 can be selected according to the specific application requirements and working conditions of the battery.

[0090] In another possible implementation, the third opening 521 on the second pole column 520 can be used as a liquid injection port for electrolyte during battery production. The third opening 521 on the second pole column 520, the first opening 413 of the buffer platform 411 of the flow guide bridge 410, the second opening 423 of the current collector plate 420, and the central hole 310 of the battery cell 300 form a vertical and continuous channel, which is conducive to the smooth injection of electrolyte into the cavity 110 of the shell 100 and the full contact with the battery cell 300, thereby ensuring that the battery cell 300 can fully react and perform.

[0091] It can be understood that, in order to realize sealing after the electrolyte is injected, the third opening 521 (i.e. the liquid injection port) can be equipped with a piston 550, and the liquid injection port is sealed by the piston 550 after the liquid injection is completed, so as to ensure that the electrolyte in the battery does not leak, and also to prevent external impurities or moisture from entering the cavity 110 of the shell 100, thereby causing adverse effects on the performance and safety of the battery.

[0092] In some embodiments of the present application, as shown in FIGS. 6 and 8, the cover plate assembly 200 further includes a pole cover 220 and a protective sheet 230, and the pole cover 220 is located on the first opening 511 of the first pole 510. The pole cover 220 is provided with a fourth opening 221, and the protective sheet 230 is located on the fourth opening 221, and the protective sheet 230 is used to seal the cavity 530. In this way, the pole cover 220 is tightly attached to the first opening 511 of the first pole 510 and is connected by welding, so as to ensure the safe and reliable connection between the first pole 510 and other components inside the battery. By setting the protective sheet 230 to seal the cavity 530 through the fourth opening 221 on the pole cover 220, it is possible to prevent moisture, dust or other impurities in the external environment from entering the cavity 530.

[0093] In a possible implementation, the pole cover 220 is made of the same metal material as the first pole 510, which can increase the area of the first pole 510 and is beneficial to enhancing the current conduction capacity. When the third opening 521 on the second pole 520 is provided with the explosion-proof valve 540, the protective sheet 230 can be made of a non-metal material and is connected to the fourth opening 221 on the pole cover 220 by adhesion, so as to ensure that the cavity 530 is sealed and prevent moisture, dust or other impurities in the external environment from entering the cavity 530. When the internal pressure of the battery cell 300 increases due to short circuit or other reasons, the explosion-proof valve 540 provided on the third opening 521 will automatically break open when the preset pressure threshold is reached, allowing the gas to be quickly released to reduce the internal pressure of the battery. At this time, the protective sheet 230 can be detached under the action of the gas pressure, so as to ensure that the gas can be smoothly discharged and prevent the battery from exploding.

[0094] It can be understood that the fourth opening 221 on the pole cover 220 can be provided with a first step structure, and the step structure is arranged on the inner edge of the fourth opening 221 and on the side of the pole cover 220 facing the cavity 530. The step structure can provide a stable support surface and accurate positioning for the installation of the protective sheet 230.

[0095] In another possible implementation, when the third opening 521 on the second pole post 520 is configured as a liquid injection opening, the pole post cover 220 is made of the same metal material as the first pole post 510, which is beneficial to enhancing the current conduction capability, and the fourth opening 221 for connecting the protective sheet 230 can be omitted on the pole post cover 220. The cavity 530 is sealed by the one-piece pole post cover 220, which can not only prevent moisture, dust or other impurities in the external environment from entering the cavity 530, but also prevent the electrolyte in the shell 100 from leaking.

[0096] In some embodiments of the present application, as shown in FIGS. 6-8, the battery further includes an insulating member 700, which is arranged between the first pole post 510 and the cover plate 210 and between the second pole post 520 and the cover plate 210. The first pole post 510 and the cover plate 210 are insulated by the insulating member 700, and the second pole post 520 and the cover plate 210 are also insulated by the insulating member 700. In this way, the insulating member 700 can realize insulation between the first pole post 510 and the cover plate 210 and between the second pole post 520 and the cover plate 210, which can avoid current short circuit or leakage and ensure stable and safe operation of the battery.

[0097] In some embodiments of the present application, as shown in FIG. 8, the insulating member 700 is provided with a through opening 710, and the cavity 530 is formed through the through opening 710. In this way, the through hole of the insulating member 700, the first opening 511 of the first pole post 510 and the second opening 211 of the cover plate 210 together form the cavity 530, which not only ensures the insulation between the first pole post 510 and the cover plate 210 and the insulation between the second pole post 520 and the cover plate 210, but also facilitates the operation of laser external penetration welding of the tab 600 and the current collector plate 420.

[0098] In some embodiments of the present application, as shown in FIGS. 7 and 8, the battery further includes a sleeve 810, which is arranged outside the connecting member 800, and the connecting member 800 and the cover plate 210 are insulated by the sleeve 810. In this way, the sleeve 810 can realize insulation between the connecting member 800 and the cover plate 210, and can also provide mechanical protection for the connecting member 800. When the battery is subjected to external impact or vibration during use or transportation, the sleeve 810 can reduce the influence of external factors on the connecting member 800, and ensure that the connecting member 800 can stably connect the first pole post 510 and the second pole post 520.

[0099] In the example of the present application, as shown in FIG. 7, the sleeve 810 is arranged on the insulating member 700 between the first pole 510 and the cover plate 210, and the insulating member 700 is provided with a protrusion on the side facing the cavity 110, which protrusion extends to the top surface of the second pole 520, and the protrusion is the sleeve 810, thereby achieving the insulation between the connecting member 800 and the cover plate 210. It should be noted that the sleeve 810 can adopt the above design, but is not limited to the above design. For example, the sleeve 810 can also be arranged on the insulating member 700 between the second pole 520 and the cover plate 210, and the insulating member 700 is provided with a protrusion on the side facing away from the cavity 110, which protrusion extends to the bottom surface of the first pole 510, and the protrusion is the sleeve 810, thereby achieving the insulation between the connecting member 800 and the cover plate 210.

[0100] For example, a combined sleeve 810 can be used. The first sleeve 810 can be arranged on the insulating member 700 between the first pole 510 and the cover plate 210, and the insulating member 700 is provided with a protrusion on the side facing the cavity 110, which protrusion extends to the top surface of the second pole 520. The second sleeve 810 can be arranged on the insulating member 700 between the second pole 520 and the cover plate 210, and the insulating member 700 is provided with a protrusion on the side facing away from the cavity 110, which protrusion extends to the bottom surface of the first pole 510. The first sleeve 810 and the second sleeve 810 are spliced to achieve the insulation between the connecting member 800 and the cover plate 210. The sleeve 810 can be made of rubber, plastic or other insulating materials, which is not limited in the example of the present application, and can be selected according to the actual working conditions.

[0101] It should be noted that the terms "upper", "lower", and the like are used to describe the relative positions of the structures in the drawings, and are only for the convenience of clear description, and do not limit the scope of the present application. Changes or adjustments of the relative positions, without substantial changes in the technical content, are also considered as the scope of the present application.

[0102] It should be noted that in the present application, unless otherwise specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0103] Furthermore, in this application, unless otherwise expressly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integral; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship of two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0104] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present disclosure. In the present specification, the exemplary description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0105] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A current collecting assembly, comprising: a current collecting plate (420) configured to be connected to a tab (600) of a battery; a current conducting bridge (410) disposed on the current collecting plate (420), a portion of the current conducting bridge (410) being raised from the current collecting plate (420) to form a buffer platform (411) configured to be electrically connected to a post (500) of the battery, the current conducting bridge (410) further having a connecting portion (412) configured to connect the current conducting bridge (410) to the current collecting plate (420). 2.The current collecting assembly of claim 1, wherein the buffer platform (411) of the current conducting bridge (410) is provided with a first opening (413) configured to be arranged opposite to a center hole (310) of a cell of the battery. 3.The current collecting assembly of claim 2, wherein the current collecting plate (420) is provided with a second opening (423) located below the first opening (413), and the first opening (413) and the second opening (423) are arranged opposite to the center hole (310) of the cell (300) of the battery. 4.The current collecting assembly of claim 3, wherein the current collecting plate (420) is provided with a plurality of third openings (424) located on a circumferential side of the second opening (423). 5.The current collecting assembly of claim 4, wherein a projection of the connecting portion (412) towards the current collecting plate (420) is staggered with the third openings (424). 6.The current collecting assembly of any one of claims 1-5, wherein the current collecting plate (420) is integrally stamped to form a protrusion (421) raised towards the tab (600), and the tab (600) is connected to the current collecting plate (420) through the protrusion (421). 7.The current collecting assembly of any one of claims 1-5, wherein an outer edge of the current collecting plate (420) further has a bending portion (422) bent towards the current conducting bridge (410), and one end of the connecting portion (412) abuts against the bending portion (422). 8.The current collecting assembly of claim 7, wherein a height of the bending portion (422) is h, and 0.3mm≤h≤3.0mm. 9.The current collecting assembly of any one of claims 7-8, wherein the bending portion (422) and the protrusion (421) raised from the current collecting plate (420) are staggered in a circumferential direction of the current collecting plate (420). 10.A battery, comprising: a shell (100) having a cavity (110) therein; A cover plate assembly (200) comprising a cover plate (210) and a pole (500) connected to the cover plate (210) and insulated from the cover plate (210), the cover plate assembly (200) being used to seal the cavity (110); An electric core (300) located in the cavity (110), at least one end of the electric core (300) being provided with a tab (600); And the current collecting assembly (400) of any one of claims 1-9, the current collecting assembly (400) being located between the cover plate assembly (200) and the electric core (300), a current collecting disc (420) of the current collecting assembly (400) being electrically connected to the tab (600) at one end of the electric core (300), and a current conducting bridge (410) of the current collecting assembly (400) being electrically connected to the pole (500).

11. The battery of claim 10, wherein the pole (500) comprises a first pole (510) and a second pole (520), the first pole (510) and the second pole (520) being respectively arranged on two sides of the cover plate (210), the first pole (510) being located on a side of the cover plate (210) facing away from the cavity (110); the second pole (520) being located on a side of the cover plate (210) facing the cavity (110), a bottom surface of the second pole (520) abutting against a buffer platform (411) of the current conducting bridge (410), and the first pole (510) and the second pole (520) being connected by a connecting piece (800).

12. The battery of claim 11, wherein a first opening (511) is formed in the first pole (510), the cover plate (210) is provided with a second opening (211) opposite to the first opening (511), the first opening (511) and the second opening (211) form a cavity (530), and a partial area of the second pole (520) is exposed at the cavity (530).

13. The battery of claim 12, wherein the second pole (520) has a welding area (522) exposed at the cavity (530).

14. The battery of claim 13, wherein the second pole (520) is integrally punched to form a groove (523) at the welding area (522), the groove (523) being in communication with the cavity (530), and a shortest distance between a groove bottom of the groove (523) and the bottom surface of the second pole (520) is d, and 0.3mm≤d≤1.3mm.

15. The battery of any one of claims 11-14, wherein the second pole post (520) is provided with a third opening (521), the third opening (521) is in communication with the cavity (110) through the first opening (413) of the current guide bridge (410) and the second opening (423) of the current collector (420) in sequence, and the third opening (521) is configured to mount an explosion-proof valve (540). Alternatively, the third opening (521) is configured to be a liquid injection port, electrolyte is injected into the cavity (110) through the third opening (521), and the liquid injection port is provided with a piston (550), and the piston (550) is configured to seal the liquid injection port.

16. The battery of claim 15, wherein the third opening (521) is arranged opposite to the first opening (413) of the current guide bridge (410), the second opening (423) of the current collector (420), and the center hole (310) of the battery cell (300).

17. The battery of any one of claims 12-14, wherein the cover plate assembly (200) further comprises a pole post cover (220) and a protection sheet (230), and the pole post cover (220) is arranged on the first opening (511) of the first pole post (510). The pole post cover (220) is provided with a fourth opening (221), and the protection sheet (230) is arranged on the fourth opening (221), and the protection sheet (230) is configured to seal the cavity (530).

18. The battery of any one of claims 12-14, further comprising an insulating member (700), and the first pole post (510) and the cover plate (210) and the second pole post (520) and the cover plate (210) are both provided with the insulating member (700), and the first pole post (510) and the cover plate (210) and the second pole post (520) and the cover plate (210) are both insulated by the insulating member (700).

19. The battery of claim 18, wherein the insulating member (700) is provided with a through hole (710), and the cavity (530) is formed by the through hole (710).

20. The battery of any one of claims 11-19, further comprising a sleeve (810), and the sleeve (810) is arranged outside the connecting member (800), and the connecting member (800) and the cover plate (210) are insulated by the sleeve (810).

21. A battery pack, comprising: the battery of any one of claims 10-20.

22. An electrical device, comprising: an electrical device, and the battery pack of claim 21 or the battery of any one of claims 10-20, and the battery pack or the battery is configured to provide electrical energy for the electrical device.

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