Current collecting components, batteries, battery packs and electrical equipment

Abstract

The present application provides a current collecting assembly, a battery, a battery pack and an electrical device, and relates to the field of battery technology. Among them, the current collecting assembly includes a current collecting plate and a guide bridge, wherein the current collecting plate is used to be connected to the battery's pole ear, and the guide bridge is arranged on the current collecting plate, and a part of the guide bridge is raised away from the current collecting plate to form a buffer platform, and the buffer platform is used to be electrically connected to the battery's pole column, and the guide bridge also has a connecting portion, and the guide bridge is connected to the current collecting plate through the connecting portion. In this way, the current collecting plate is closely connected to the battery's pole ear, and the guide bridge arranged on the current collecting plate is connected to the battery's pole column, thereby realizing two-way flow guidance. The area where the guide bridge is raised away from the current collecting plate forms a buffer platform, which is convenient for assembling the battery cover plate as a box cover after the battery cell is assembled, which plays a role in relieving the assembly, and is conducive to absorbing the height tolerance of the battery cell inside the battery. It not only simplifies the assembly process and improves the guide effect of the battery, but also enhances the overall stability of the battery system.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of battery technology, and specifically to a current collecting assembly, a battery, a battery pack, and an electrical device. Background Art

[0002] With the continuous advancement of battery technology and the growing market demand, battery performance in new energy battery vehicles has received more and more attention, and battery energy density and safety have become important indicators for measuring battery performance.

[0003] However, the poles of conventional cylindrical batteries are fixed with rivets, the current collector and the guide bridge are integrated, and the guide bridge needs to be connected to the pole by bending before closing. The thickness and width of the guide bridge increase during the bending process, which will affect the current capacity of the guide bridge. In addition, since the pole needs to cooperate with the rivets, it is also necessary to leave enough space for the explosion-proof valve and the injection port. The limitation of the pole size will also affect the contact area with the battery cell, thereby affecting the overall performance of the battery. Summary of the invention

[0004] The embodiments of the present application provide a current collecting assembly, a battery, a battery pack and an electrical device, wherein the current collecting assembly includes a guide bridge and a current collecting plate. The guide bridge and the current collecting plate are designed separately. The guide bridge is connected to the current collecting plate through a connecting part to realize two-way flow guidance, thereby solving the problem that the current collecting plate equipped with a guide bridge needs to bend the guide bridge before installing a box cover, thereby simplifying the assembly process and improving the performance and reliability of the assembly.

[0005] The embodiments of the present application provide the following technical solutions to solve the above technical problems:

[0006] In the first part, an embodiment of the present application provides a current collecting assembly, including:

[0007] A current collecting plate, the current collecting plate is used to be connected to the battery tab;

[0008] A guide bridge is arranged on the current collecting plate, and a partial area of ​​the guide bridge is raised away from the current collecting plate to form a buffer platform, and the buffer platform is used to be electrically connected to the pole of the battery. The guide bridge also has a connecting part, and the guide bridge is connected to the current collecting plate through the connecting part.

[0009] Beneficial effects of the embodiments of the present application: The current collecting assembly provided in the embodiments of the present application includes a current collecting plate and a guide bridge, wherein the current collecting plate is used to be connected to the pole ear of the battery, the guide bridge is arranged on the current collecting plate, and a part of the guide bridge is raised away from the current collecting plate to form a buffer platform, the buffer platform is used to be electrically connected to the pole column of the battery, and the guide bridge also has a connecting portion, and the guide bridge is connected to the current collecting plate through the connecting portion. In this way, the current collecting plate is closely connected to the pole ear of the battery, and the guide bridge arranged on the current collecting plate is connected to the pole column of the battery, thereby realizing two-way flow conduction. The area where the guide bridge is raised away from the current collecting plate forms a buffer platform, which is convenient for assembling the battery cover plate as a box cover after the battery cell is assembled, which plays a role in alleviating the assembly and is conducive to absorbing the height tolerance of the battery cell inside the battery. It not only simplifies the assembly process and improves the guide effect of the battery, but also enhances the overall stability of the battery system.

[0010] In a possible implementation manner, a first opening is provided on the buffer platform of the guide bridge, and the first opening is used to be arranged opposite to a central hole on a battery cell of the battery.

[0011] In a possible embodiment, the current collecting plate is provided with a second opening, the second opening is located below the first opening, and the first opening, the second opening and the center hole of the battery cell are arranged opposite to each other. In this way, the first opening, the second opening and the center hole form a vertical channel, which is conducive to the circulation 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, the second opening and the center hole in sequence, and react with the battery cell. Alternatively, if a short circuit occurs inside the battery and the internal pressure of the battery increases sharply, the internal gas can be discharged from the cavity of the shell through the second opening and the first opening arranged vertically.

[0012] In one possible implementation, the current collecting disk is provided with a plurality of third openings, and the plurality of third openings are located around the second openings. Thus, in one possible implementation, the electrolyte can not only enter the cavity of the outer shell through the second openings on the current collecting disk, but also enter through the third openings, so as to ensure that the electrolyte can fully flow into the cavity of the outer shell and fully react with the battery cells of the battery. In another possible implementation, the gas generated by a short circuit inside the battery will cause a sharp increase in the pressure in the cavity of the outer shell. The second opening and the third opening provided are conducive to the rapid discharge of the gas, thereby effectively releasing the internal pressure of the outer shell and preventing the battery shell from rupturing or exploding.

[0013] In a possible implementation, the projection of the connection portion toward the current collecting plate is staggered from the third opening. In this way, it is possible to avoid interference of the connection portion of the guide bridge with the function of the third opening on the current collecting plate, ensuring that the third opening can smoothly allow the electrolyte to flow into the cavity of the shell, or the third opening can ensure the discharge of gas in the cavity inside the shell, or ensure that the heat in the shell is dissipated.

[0014] In a possible implementation, the collector plate is integrally stamped to form convex grooves protruding toward the pole lugs, and the pole lugs are connected to the collector plate through the convex grooves. In this way, the convex grooves of the collector plate facing the battery cell can increase the structural strength of the collector plate, make the collector plate more stable during use, and reduce the possibility of deformation and damage. The convex grooves can also make the contact between the pole lugs and the collector plate more compact and uniform, which is conducive to improving the quality and efficiency of welding and ensuring smooth transmission of current.

[0015] In a possible embodiment, the outer edge of the current collecting plate has a bending portion, the bending portion is bent toward the current guiding bridge, and one end of the connecting portion is in contact with the bending portion. In this way, the connecting portion of the current guiding bridge and the connecting surface of the current collecting plate can be determined by the bending portion on the current collecting plate. The bending portion can not only provide a clear positioning point for the current guiding bridge, but also prevent the wrong installation or direction confusion that may occur during the assembly process of the current guiding bridge and the current collecting plate, simplify the assembly process, improve production efficiency, and ensure the consistency and reliability of each battery.

[0016] In a possible implementation manner, the height of the bending portion is h, and 0.3 mm ≤ h ≤ 3.0 mm.

[0017] In a possible implementation, the bent portion and the raised convex pattern on the current collecting disk are staggered in the circumferential direction of the current collecting disk. In this way, it can be ensured that the bent portion and the convex pattern on the current collecting disk do not interfere with each other, and the spatial layout and functional allocation of the current collecting disk are optimized, thereby improving the performance and reliability of the battery.

[0018] In the second part, an embodiment of the present application provides a battery, including:

[0019] A housing having a cavity therein;

[0020] A cover plate assembly, the cover plate assembly comprising a cover plate and a pole, the pole being connected to the cover plate and insulated from the cover plate, and the cover plate assembly being used to seal the cavity;

[0021] A battery cell, wherein the battery cell is located in the cavity, and at least one end of the battery cell is provided with a pole ear;

[0022] And the above-mentioned current collecting assembly, the current collecting assembly is located between the cover plate assembly and the battery cell, the current collecting plate of the current collecting assembly is electrically connected to the pole ear at one end of the battery cell, and the guide bridge of the current collecting assembly is electrically connected to the pole.

[0023] In a possible embodiment, the pole includes a first pole and a second pole, the first pole and the second pole are respectively arranged on both sides of the cover plate, the first pole is located on the side of the cover plate away from the cavity; the second pole is located on the side of the cover plate facing the cavity, the bottom surface of the second pole is abutted against the buffer platform of the guide bridge, and the first pole and the second pole are connected by at least two connectors. In this way, the second pole arranged on one side of the cover plate is electrically connected to the pole ear of the battery cell through the current collecting assembly, which is used to transmit the current of the battery cell. The first pole arranged on the other side of the cover plate is connected to the second pole through a connector to achieve stable connection and current transmission between the first pole and the second pole. A connection can be formed with an external circuit through the first pole, or the first pole is connected to an external load, which is responsible for transmitting the current of the battery cell.

[0024] In a possible implementation, a first opening is provided on the first pole, a second opening opposite to the first opening is provided on the cover plate, the first opening and the second opening form a cavity, and a portion of the second pole is exposed in the cavity. In this way, the cavity facilitates 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 through the portion of the second pole exposed in the cavity, so that a full radial weld is formed between the pole ear of the battery cell and the collector plate.

[0025] In a possible embodiment, the second pole has a welding area, and the welding area is exposed at the cavity. In this way, when the battery shell and the cover plate are welded together, part of the bottom surface of the second pole fits with the top surface of the buffer platform on the guide bridge, and compresses the buffer platform on the guide bridge, and the distance between the welding area on the second pole and the pole ear is further shortened, and the cavity is entered from the first opening of the first pole, and the welding area on the second pole exposed in the cavity is laser penetrated and welded, which is conducive to forming a full radial welding between the pole ear and the collector plate, thereby realizing the diversion.

[0026] In a possible implementation manner, the second pole is integrally stamped to form a groove in the welding area, the groove is communicated with the cavity, the shortest distance between the bottom of the groove and the bottom surface of the second pole is d, and 0.3 mm≤d≤1.3 mm.

[0027] In a possible embodiment, a third opening is provided on the second pole, and the third opening is connected to the cavity through the first opening of the guide bridge and the second opening of the collector plate in sequence, and the third opening is used to install an explosion-proof valve; in this way, when a short circuit occurs inside the battery under extreme circumstances, the internal pressure of the battery rises sharply, and the explosion-proof valve located at the center of the second pole can respond and open quickly, effectively releasing the internal pressure of the cavity and preventing the battery shell from rupturing or exploding. Alternatively, the third opening is a liquid injection port, and 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 to seal the liquid injection port.

[0028] In a possible implementation, the third opening is arranged opposite to the first opening of the guide bridge, the second opening of the current collecting plate, and the center hole of the battery cell. In this way, the third opening, the first opening of the guide bridge, the second opening of the current collecting plate, and the center hole of the battery cell arranged opposite to each other will form a vertical channel, which is conducive to the flow of the electrolyte to the cavity inside the shell, and promotes the full contact and reaction between the electrolyte and the battery cell.

[0029] In a possible embodiment, the cover plate assembly further includes a pole cover and a protective sheet, wherein the pole cover is located on the first opening of the first pole; a fourth opening is provided on the pole cover, and the protective sheet is located on the fourth opening, and the protective sheet is used to seal the cavity. In this way, the pole cover fits tightly with the first opening of the first pole and is connected by welding, thereby ensuring a safe and reliable connection between the first pole and other components inside the battery. By providing a protective sheet to seal the cavity at the fourth opening on the pole cover, moisture, dust or other impurities in the external environment can be prevented from entering the cavity.

[0030] In a possible implementation, an insulating member is further included, and the insulating member is provided between the first pole and the cover plate, and between the second pole and the cover plate, and the first pole and the cover plate, and the second pole and the cover plate are insulated by the insulating member. In this way, the insulation between the first pole and the second pole and the cover plate is achieved by the insulating member, so that current short circuit or leakage can be avoided, and the battery can be ensured to operate stably and safely.

[0031] In a possible implementation, the insulating member is provided with a through hole, and the cavity is formed by the through hole. In this way, the through hole of the insulating member, the first opening of the first pole, and the second opening of the cover plate form a cavity together, which not only ensures the insulation between the first pole and the cover plate, and the insulation between the second pole and the cover plate, but also facilitates the operation convenience of laser external penetration welding of the pole ear and the collector plate.

[0032] In a possible implementation, a sleeve is further included, the sleeve is located outside the connector, and the connector and the cover plate are insulated by the sleeve. In this way, the connector and the cover plate can be insulated by the sleeve, and mechanical protection can be provided for the connector. When the battery is subjected to external shock or vibration during use or transportation, the sleeve can reduce the impact of external factors on the connector, ensuring that the connector can stably connect the first pole and the second pole.

[0033] In the third part, the embodiment of the present application further provides a battery pack, including:

[0034] The battery described above is a cylindrical battery.

[0035] In the fourth part, the embodiment of the present application further provides an electric device, including:

[0036] An electrical device, and the above-mentioned battery pack or the above-mentioned battery, wherein the battery pack or the battery is used to provide electrical energy to the electrical device.

[0037] In addition to the technical problems solved by the present application, the technical features that constitute the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions described above, other technical problems that can be solved by a current collecting assembly, battery, battery pack and electrical equipment provided by the present application, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further described in detail in the specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments of the present application or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only part of the embodiments of the present application. These drawings and text descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application for those skilled in the art by referring to specific embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0039] Figure 1 A schematic diagram of the structure of a current collecting assembly of a battery provided in an embodiment of the present application;

[0040] Figure 2 A schematic diagram of the structure of a guide bridge provided in an embodiment of the present application;

[0041] Figure 3 A schematic diagram of the structure of a current collecting plate provided in an embodiment of the present application;

[0042] Figure 4A schematic diagram of the structure of another flow-guiding bridge provided in an embodiment of the present application;

[0043] Figure 5 A schematic diagram of the structure of another current collecting plate provided in an embodiment of the present application;

[0044] Figure 6 A cross-sectional view of one end of a battery provided with an explosion-proof valve according to an embodiment of the present application;

[0045] Figure 7 A cross-sectional view of one end of a battery provided with a liquid injection port according to an embodiment of the present application;

[0046] Figure 8 An exploded diagram of a battery provided with an explosion-proof valve according to an embodiment of the present application;

[0047] Fig. 9 A top view of a second electrode of a battery provided in an embodiment of the present application;

[0048] Fig.10 A cross-sectional view of the second electrode of the battery provided in an embodiment of the present application.

[0049] Description of reference numerals:

[0050] 100-housing;

[0051] 110- cavity;

[0052] 200-cover plate assembly;

[0053] 210 - cover plate; 211 - second opening;

[0054] 220-pole cover; 221-fourth opening;

[0055] 230-protective sheet;

[0056] 300-battery cells;

[0057] 310-center hole;

[0058] 400-current collecting assembly;

[0059] 410-guide bridge; 411-buffer platform; 412-connecting part; 413-first opening;

[0060] 420 - current collecting plate; 421 - convex pattern; 422 - bending portion; 423 - second opening; 424 - third opening;

[0061] 500-pole;

[0062] 510 - first pole; 511 - first opening;

[0063] 520 - second pole; 521 - third opening; 522 - welding area; 523 - groove;

[0064] 530-cavity;

[0065] 540-explosion-proof valve;

[0066] 550-piston;

[0067] 600-ear;

[0068] 700-insulation parts;

[0069] 710-through opening;

[0070] 800-connector;

[0071] 810-sleeve; 820-through hole. DETAILED DESCRIPTION

[0072] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0073] An embodiment of the present application provides an electric device, which includes an electric device and a battery pack or a battery, and the battery pack or the battery provides electric energy to the electric device. For example, the electric device may be a vehicle or an energy storage device. When the electric device is a vehicle, the vehicle may be an electric vehicle, an electric vehicle, a fuel vehicle, or a hybrid vehicle. The electric device may be an electric motor, a control system, a lighting system, etc. When the electric device is an energy storage device, the electric device may be an inverter, a controller, etc. The battery pack may include a plurality of batteries, and in an embodiment of the present application, the battery is a cylindrical battery. And the plurality of batteries realize the storage and output of electric energy through a certain connection method and a control system, and the electric energy provided to the electric device by the battery pack or the battery can meet the normal operation of the device.

[0074] The present application embodiment provides a current collecting assembly 400 of a battery, such as Figure 6 and Figure 7 As shown, the current collecting assembly 400 includes a current collecting plate 420 and a current guiding bridge 410. The current collecting plate 420 is used to be connected to the battery's pole lug 600. The current guiding bridge 410 is arranged on the current collecting plate 420, and a part of the current guiding bridge 410 is raised away from the current collecting plate 420 to form a buffer platform 411, and the buffer platform 411 is used to be electrically connected to the battery's pole 500, and the current guiding bridge 410 also has a connecting portion 412, and the current guiding bridge 410 is connected to the current collecting plate 420 through the connecting portion 412.

[0075] One side of the current collecting plate 420 is connected to the battery's pole ear 600, and is responsible for collecting and distributing current. The other side of the current collecting plate 420 is electrically connected to the battery's pole 500 through the buffer platform 411 on the guide bridge 410. The current collecting plate 420 and the guide bridge 410 are welded through the connecting portion 412 to achieve a close connection, which can ensure the continuous conduction of the battery current, thereby improving the current conduction efficiency. In addition, an appropriate area of ​​the connecting portion 412 helps to improve the heat conduction effect between the guide bridge 410 and the current collecting plate 420, and reduce the operating temperature of the battery. The guide bridge 410 and the current collecting plate 420 can be made of aluminum or 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 repeated here. The materials of the guide bridge 410 and the current collecting plate 420 can be selected according to the actual working conditions.

[0076] The central area of ​​the guide bridge 410 is provided with a buffer platform 411 protruding away from the current collecting plate 420. Figure 2 As shown in FIG. 1 , in a possible implementation, the guide bridge 410 is in an I-shaped structure, and a buffer platform 411 protruding away from the current collecting plate 420 is provided in the center area of ​​the I-shaped structure, and the buffer platform 411 is in a rectangular shape. Figure 4 As shown, in another possible implementation, the guide bridge 410 is in a "cross" shaped structure, and a buffer platform 411 protruding away from the current collecting plate 420 is provided in the central area of ​​the "cross" shaped structure, and the buffer is in a circular shape. It should be noted that the guide bridge 410 can be the above-mentioned "I" shaped structure or "X" shaped structure, but is not limited to the above-mentioned two shapes, for example, it can also be other shapes such as a circular structure, and the shape of the guide bridge 410 can be adjusted according to the actual working conditions of the battery. In the embodiment of the present application, the guide bridge 410 with a "I" shaped structure is mainly used for explanation.

[0077] It is understandable that when the outer shell 100 and the cover plate 210 are welded after the battery cell 300 is assembled, the buffer platform 411 on the guide bridge 410 can absorb the pressure during the assembly process and play a certain buffering role. By squeezing the buffer platform 411, the height tolerance of the battery cell 300 is absorbed to protect the battery pole 500, the battery cell 300 and other internal components from damage. It should be noted that the raised buffer platform 411 on the guide bridge 410 can be the above-mentioned rectangular or circular shape, but is not limited to the above-mentioned shapes, for example, it can also be other shapes such as quasi-circular, triangular, trapezoidal, etc.

[0078] The guide bridge 410 is provided with a connecting portion 412, and the connecting portion 412 is located around the buffer platform 411. In one possible implementation, when the guide bridge 410 is in a "one"-shaped structure, there are two connecting portions 412, which are respectively located on both sides of the buffer platform 411. In another possible implementation, when the guide bridge 410 is in a "cross"-shaped structure, there are four connecting portions 412, which are respectively located around the buffer platform 411. The symmetrically arranged connecting portions 412 can achieve a tight connection between the guide bridge 410 and the current collecting plate 420, ensuring the current conduction continuity of the battery cell 300, and also allowing the guide bridge 410 to be firmly installed on the current collecting plate 420, and not easy to loosen or fall off. It should be noted that the number and position of the connecting portions 412 on the guide bridge 410 can be the above two types, but are not limited to the above 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 is a disc-shaped structure, the annular area around the buffer platform 411 on the guide bridge 410 can be the connecting portion 412 .

[0079] It is understandable that the larger the area of ​​the connecting portion 412, the larger the contact area between the guide bridge 410 and the current collecting plate 420. When heat is generated during the operation of the battery, the heat conduction effect between the guide bridge 410 and the current collecting plate 420 will be better. It can also improve the conduction efficiency of current, reduce resistance and heat accumulation, and thus benefit the overall performance of the battery system. However, as the contact area increases, the complexity of the internal design of the battery will increase, and the manufacturing cost and the difficulty of installation and maintenance will increase. The size of the connecting portion 412 on the guide bridge 410 can be adjusted and designed according to the actual working conditions of the battery.

[0080] In some embodiments of the present application, Figures 2 to 5 As shown, a first opening 413 is provided on the buffer platform 411 of the guide bridge 410, and the first opening 413 is used to be arranged opposite to the center hole 310 on the battery cell. A second opening 423 is provided on the current collecting plate 420, and the second opening 423 is located below the first opening 413, and the first opening 413 and the second opening 423 are arranged opposite to the center hole 310 on the battery cell 300 of the battery. In this way, the first opening 413, the second opening 423 and the center hole 310 form a vertical channel, which is conducive to the circulation of the 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, if a short circuit occurs inside the battery and causes a sharp increase in the internal pressure of the battery, the internal gas can be discharged from the cavity 110 of the shell 100 through the vertically arranged second opening 423 and the first opening 413, which will be explained in detail later.

[0081] In the embodiment of the present application, the cylindrical battery is mainly used for explanation. The battery cell 300 inside 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 inside during the winding process. The center hole 310 can not only provide structural support for the battery cell 300, but also serve as a channel for the electrolyte, thereby improving the performance of the battery. It should be noted that in the example 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 actual working conditions.

[0082] In some embodiments of this application, please continue to refer to Figure 3 and Figure 5 As shown, the current collecting plate 420 is provided with a plurality of third openings 424, and the plurality of third openings 424 are located around the second openings 423. Thus, in a possible implementation, the electrolyte can not only enter the cavity 110 of the housing 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 housing 100 and fully react with the battery cell 300 of the battery. In another possible implementation, the gas generated by a short circuit inside the battery will cause the pressure inside the cavity 110 of the housing 100 to rise sharply, and the second openings 423 and the third openings 424 are provided to facilitate the rapid discharge of the gas, thereby effectively releasing the internal pressure of the housing 100 and preventing the battery housing 100 from rupturing or exploding. It is understandable that the battery will generate a certain amount of heat during operation, and the heat can also be promptly dissipated from the cavity 110 of the housing 100 through the second openings 423 and the third openings 424, so as to ensure that the battery operates at a suitable temperature.

[0083] In some embodiments of the present application, Figure 1 As shown, the projection of the connection portion 412 toward the current collecting plate 420 is staggered with the third opening 424. In this way, it is possible to avoid interference between the connection portion 412 of the guide bridge 410 and the function of the third opening 424 on the current collecting plate 420, ensuring that the third opening 424 can smoothly allow the electrolyte to flow into the cavity 110 of the housing 100, or the third opening 424 can ensure the discharge of gas in the cavity 110 inside the housing 100, or ensure that the heat in the housing 100 is dissipated.

[0084] The present application provides a current collecting assembly 400, such as Figure 2 As shown in FIG. 1 , when the guide bridge 410 is in a “I”-shaped structure, the connecting portion 412 has two. Figure 3As shown in FIG. 1 , the third openings 424 on the current collecting plate 420 may be provided with six. Figure 1 As shown, in the direction of the connecting portion 412 on the guide bridge 410 toward the housing 100 , the projection on the collecting plate 420 is staggered with the third opening 424 .

[0085] Another current collecting assembly 400 provided by the present application is as follows: Figure 4 As shown in FIG. 1 , when the guide bridge 410 is in a “cross” shape, the connecting portion 412 has four connecting portions. Figure 5 As shown, four third openings 424 may be provided on the collecting plate 420. The projection of the connecting portion 412 on the guide bridge 410 on the collecting plate 420 is staggered with the third opening 424 in the direction toward the housing 100. After the guide bridge 410 and the collecting plate 420 are assembled, the connecting portion 412 will not affect the use of the third opening 424. It should be noted that the shapes of the guide bridge 410 and the collecting plate 420 may be the above shapes, but are not limited to the above shapes. When the guide bridge 410 and the collecting plate 420 are assembled, the normal use of the third opening 424 is not affected, and the function of the third opening 424 is not affected.

[0086] In some embodiments of the present application, Figure 3 , Figures 5 to 7 As shown, the current collecting plate 420 is integrally stamped to form a convex pattern 421 protruding toward the pole lug 600, and the pole lug 600 is connected to the current collecting plate 420 through the convex pattern 421. In this way, the convex pattern 421 of the current collecting plate 420 facing the battery cell 300 can increase the structural strength of the current collecting plate 420, make the current collecting plate 420 more stable during use, and reduce the possibility of deformation and damage. The convex pattern 421 can also make the contact between the pole lug 600 and the current collecting plate 420 more compact and uniform, which is conducive to improving the quality and efficiency of welding and ensuring smooth transmission of current.

[0087] For example, Figure 3 and Figure 5 As shown, there are four convex patterns 421 on the current collecting plate 420, and the convex patterns 421 are symmetrical in shape, and a third opening 424 is provided at the center of the convex patterns 421. It should be noted that the shape of the convex patterns 421 can be a symmetrical shape as shown in the figure, but is not limited to the shape shown in the figure, for example, it can also be an asymmetrical convex pattern 421, and the area and number of the convex patterns 421 can be adjusted and changed according to the requirements of the battery in actual working conditions.

[0088] In some embodiments of the present application, Figure 3 , Figure 5 and Figure 6As shown, the outer edge of the current collecting plate 420 has a bending portion 422, and the bending portion 422 is bent toward the flow guiding bridge 410, and one end of the connecting portion 412 is in contact with the bending portion 422. The height of the bending portion 422 is h, and 0.3mm≤h≤3.0mm. In this way, the connecting surface between the connecting portion 412 of the flow guiding bridge 410 and the current collecting plate 420 can be determined by the bending portion 422 on the current collecting plate 420. The bending portion 422 can not only provide a clear positioning point for the flow guiding bridge 410, but also prevent the wrong installation or direction confusion that may occur during the assembly process of the flow guiding bridge 410 and the current collecting plate 420, simplify the assembly process, improve production efficiency, and ensure the consistency and reliability of each battery.

[0089] It is understandable that when the height h of the bend 422 is too small, for example, h<0.3mm, the bend 422 cannot provide a stable positioning point for the guide bridge 410, which may cause the guide bridge 410 to shift or misalign during the assembly process, increasing the difficulty and time of assembly.

[0090] When the height h of the bend 422 is too large, for example, h>3.0 mm, the bend 422 will occupy more space, which may lead to a compact layout inside the housing 100, affecting the installation of other components and the overall size of the battery. The increase in the height of the bend 422 will also increase the material of the collector 420, resulting in an increase in cost. In addition, a bend 422 that is too high may cause stress concentration during the battery charging and discharging process, which may increase the possibility of damage to the internal structure of the battery.

[0091] In some embodiments of the present application, Figure 2 and Figure 3 , combined Figure 4 and Figure 5 As shown, the bent portion 422 and the raised convex pattern 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 bent portion 422 and the convex pattern 421 on the current collecting plate 420 do not interfere with each other, and the spatial layout and functional allocation of the current collecting plate 420 are optimized, thereby improving the performance and reliability of the battery.

[0092] The present application also provides a battery, such as Figure 6 and Figure 7As shown, the battery includes a housing 100, a cover assembly 200, a battery cell 300 and the above-mentioned current collecting assembly 400. Among them, the housing 100 has a cavity 110, the battery cell 300 is located in the cavity 110, and at least one end of the battery cell 300 is provided with a pole ear 600. The cover assembly 200 includes 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 assembly 200 is used to seal the cavity 110. The current collecting assembly 400 is located between the cover assembly 200 and the battery cell 300, the current collecting plate 420 of the current collecting assembly 400 is electrically connected to the pole ear 600 at one end of the battery cell 300, and the current guiding bridge 410 of the current collecting assembly 400 is electrically connected to the pole 500.

[0093] The housing 100 has a cavity 110, and the cavity 110 is used to accommodate the battery cell 300 and other battery components. The two ends of the housing 100 are respectively connected to the cover assembly 200, and the housing 100 can protect the battery cell 300 and the internal components, and prevent the battery cell 300 and the internal components from being mechanically damaged by external vibration, impact, etc. The cover assembly 200 can ensure that the battery cell 300 and the 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 internal structure of the battery. Among them, the cover plate 210 of the cover assembly 200 is used to seal the cavity 110 of the housing 100 to prevent electrolyte leakage and external environment from eroding the battery cell 300. The pole 500 is connected to the cover plate 210, and the pole 500 is insulated from the cover plate 210 to avoid short circuits in the battery and ensure the safety of the battery.

[0094] It should be noted that the cover 210 and the housing 100 can be made of aluminum or 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 elaborated here. The materials of the cover 210 and the housing 100 can be selected according to actual working conditions.

[0095] The battery cell 300 is used to store and release electric energy. Both ends of the battery cell 300 are provided with pole ears 600, which are connected to the pole column 500 through the current collecting assembly 400. The current collecting assembly 400 ensures good contact and current transmission between the pole ears 600 of the battery cell 300 and the pole column 500, thereby improving the performance and reliability of the battery, so that the pole column 500 is electrically connected to the external circuit to realize the power supply function. It should be noted that in the example of the present application, the current collecting assembly 400 is connected to the pole column 500 through the current collecting assembly 400. Figures 1 to 3 The shapes shown are expanded for explanation.

[0096] In some embodiments of the present application, Figures 6 to 8As shown, the pole 500 includes a first pole 510 and a second pole 520, and the first pole 510 and the second pole 520 are respectively arranged on both sides of the cover plate 210, and 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 platform 411 of the guide bridge 410, and the first pole 510 and the second pole 520 are connected by a connector 800, for example, there may be two, three, four or five, and the example of this application is mainly explained with four connectors 800. The connector 800 sequentially penetrates the top cover and the two insulating members 700 respectively arranged on both sides of the top cover, and connects the first pole 510 and the second pole 520 through the connector 800.

[0097] In this way, the second pole 520 disposed on one side of the cover plate 210 is electrically connected to the pole lug 600 of the battery cell 300 through the current collecting assembly 400, and is used to transmit the current of the battery cell 300. The first pole 510 disposed on the other side of the cover plate 210 is connected to the second pole 520 through the connector 800, so as to achieve a stable connection and current transmission between the first pole 510 and the second pole 520. The first pole 510 can be connected to an external circuit, or the first pole 510 is connected to an external load, and is responsible for transmitting the current of the battery cell 300.

[0098] It should be noted that in the embodiment of the present application, the first pole 510, the second pole 520 and the connecting member 800 can be made of aluminum or copper, but are not limited to the above-mentioned metal materials. For example, stainless steel or other alloy materials can also be used, which will not be elaborated here. The materials of the first pole 510, the second pole 520 and the connecting member 800 can be selected according to actual working conditions.

[0099] In the embodiment of the present application, the connector 800 can be formed by cold heading or riveting, and the diameter of the connector 800 can be between φ1.0 and φ5.0 mm, for example, φ1.5 mm, φ3.5 mm or φ4.8 mm, and the diameter of the connector 800 can also be equal to φ1.0 mm or φ5.0 mm. It should be noted that the material, quantity and diameter of the connector 800 can be adjusted according to the battery overcurrent performance requirements of the actual working conditions, which will not be elaborated here. It can be understood that when the number and diameter of the connector 800 are large, the connection stability and current conduction capability between the first pole 510 and the second pole 520 can be further enhanced.

[0100] It is understandable that if Figure 8As shown, the first pole 510, the insulating member 700, the cover plate 210 and the second pole 520 are all provided with through holes 820, and the number of the through holes 820 is consistent with the number of the connecting members 800. The connecting member 800 sequentially passes through the through hole 820 on the first pole 510, the through hole 820 on the insulating member 700 between the first pole 510 and the cover plate 210, the through hole 820 on the cover plate 210, the through hole 820 on the insulating member 700 between the second pole 520 and the cover plate 210, and the through hole 820 on the second pole 520, and connects the first pole 510, the insulating member 700, the cover plate 210 and the second pole 520.

[0101] In some embodiments of the present application, Figure 8 As shown, a first opening 511 is provided on the first pole 510, and a second opening 211 opposite to the first opening 511 is provided on the cover plate 210. The first opening 511 and the second opening 211 form a cavity 530, and a partial area on the second pole 520 is exposed at the cavity 530. In this way, the cavity 530 facilitates laser penetration welding from the outside of the battery to the inside of the cavity 530 after the top cover is welded to the shell 100, and laser penetration welding is performed through a partial area on the second pole 520 exposed in the cavity 530, so that a full radial weld is formed between the pole ear 600 of the battery cell 300 and the collector plate 420.

[0102] A first opening 511 is provided in the central area of ​​the first pole 510, and a second opening 211 opposite to the first opening 511 is provided in the central area of ​​the cover plate 210. A cavity 530 is formed by the first opening 511 and the second opening 211, so that a part of the second pole 520 on the side facing away from the cavity 110 can be exposed inside and outside the cavity 530. After the top cover is connected to the housing 100, the cavity 530 provides an operating space for laser penetration welding, so that the laser can perform welding operations on a part of the cavity 530 where the second pole 520 is exposed, thereby realizing welding between the tab 600 of the battery cell 300 and the current collecting plate 420, and simplifying the welding process of the tab 600.

[0103] It should be noted that in the example of the present application, the first opening 511 on the first pole 510 and the second opening 211 on the cover plate 210 are both rectangular, but are not limited to rectangles. For example, they can also be other shapes such as circular, quasi-circular or triangular. The shape and size of the first opening 511 and the second opening 211 can be adjusted according to actual working conditions.

[0104] It can be understood that a step structure is provided at the first opening 511 on the first pole 510 and the second opening 211 on the cover plate 210. The step structure on the first pole 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 510 facing away from the cover plate 210, and the step structure can provide a stable support surface and precise positioning for installing 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 facing away from the second pole 520, and the step structure can provide a stable support surface and precise positioning for installing the insulating member 700 arranged between the top cover and the first pole 510.

[0105] In some embodiments of the present application, Figure 8 and Fig. 9 As shown, the second pole 520 has a welding area 522, and the welding area 522 is exposed at the cavity 530. In this way, when the battery housing 100 and the cover plate 210 are welded together, part of the bottom surface of the second pole 520 fits with the top surface of the buffer platform 411 on the guide bridge 410, and compresses the buffer platform 411 on the guide bridge 410, and the distance between the welding area 522 on the second pole 520 and the pole ear 600 is further shortened, and the first opening 511 of the first pole 510 enters the cavity 530, and laser penetration welding is performed on the welding area 522 on the second pole 520 exposed in the cavity 530, which is conducive to achieving full radial welding between the pole ear 600 and the current collecting plate 420, thereby achieving current diversion.

[0106] In a possible implementation, the second pole 520 can be formed into a welding area 522 by stamping a thin plate. The welding area 522 can be rectangular, circular, quasi-circular or other shapes. The size and shape of the welding area 522 can be adjusted according to actual working conditions.

[0107] In some embodiments of the present application, Fig. 9 and Fig.10 As shown, the second pole 520 is integrally stamped to form a groove 523 in the welding area 522, the groove 523 is connected to the cavity 530, and the shortest distance between the bottom of the groove 523 and the bottom surface of the second pole 520 is d, and 0.3mm≤d≤1.3mm.

[0108] In another possible implementation, the welding area 522 on the second pole 520 can also be formed by stamping and thinning, and a partial area is thinned on the side of the second pole 520 facing the cavity 530 to form a groove 523, and the groove 523 is connected to the cavity 530. It can be understood that when the shortest distance d between the bottom of the groove 523 and the bottom surface of the second pole 520 is too small, for example, d < 0.3mm, the laser external penetration welding connecting the pole ear 600 and the collector plate 420 may cause excessive concentration of welding heat, increasing the possibility of welding deformation and cracks. When the shortest distance d between the bottom of the groove 523 and the bottom surface of the second pole 520 is too large, for example, d > 3.0mm, the welding effect of the laser external penetration welding connecting the pole ear 600 and the collector plate 420 may be affected, and the possibility of false welding or broken welding may occur.

[0109] In some embodiments of the present application, Figures 6 to 8 As shown, the second pole 520 is provided with a third opening 521, and the third opening 521 is connected to the cavity 110 through the first opening 413 of the guide bridge 410 and the second opening 423 of the current collecting plate 420 in sequence, and the third opening 521 is arranged relative to the first opening 413 of the guide bridge 410, the second opening 423 of the current collecting plate 420, and the center hole 310 on the battery cell 300, and the third opening 521 is used to install the explosion-proof valve 540. In this way, when a short circuit occurs inside the battery under extreme conditions, the internal pressure of the battery rises sharply, and the explosion-proof valve 540 located at the center of the second pole 520 can respond quickly and open, effectively releasing the internal pressure of the cavity 110, and preventing the battery shell from rupturing or exploding. Alternatively, the third opening 521 is a liquid injection port, and the 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 used to seal the liquid injection port. The relatively arranged third opening 521, the first opening 413 on the guide bridge 410, the second opening 423 on the collecting plate 420, and the central hole 310 of the battery cell 300 will form a vertical channel, which is conducive to the flow of the electrolyte to the cavity 110 inside the shell 100, and promotes full contact and reaction between the electrolyte and the battery cell 300.

[0110] It is understandable that the explosion-proof valve 540 on the conventional battery is set at a position deviated from the center of the battery cell 300, which will cause the gas discharge path to become longer and the gas discharge efficiency to decrease. In a possible implementation, the third opening 521 on the second pole 520 can be used to install the explosion-proof valve 540. The explosion-proof valve 540 is arranged relative to the first opening 413 on the buffer platform 411 of the guide bridge 410, the second opening 423 on the collector plate 420, and the center hole 310 of the battery cell 300. When a short circuit occurs inside the battery and a fire occurs, the generated gas can be discharged faster through the explosion-proof valve 540 at the center of the second pole 520, reducing the accumulation of gas inside the battery and reducing the possibility of explosion of the battery housing 100. It should be noted that the explosion-proof valve 540 can be obtained by stamping to obtain the desired shape and size, or the explosion-proof sheet can be welded to the third opening 521 on the second pole 520. The explosion-proof valve 540 can select a suitable forming method according to the specific application requirements and working conditions of the battery.

[0111] In another possible implementation, the third opening 521 on the second pole 520 can be used as an injection port for the electrolyte during the battery production process. The third opening 521 on the second pole 520, the first opening 413 on the buffer platform 411 of the guide bridge 410, the second opening 423 on the current collecting plate 420, and the central hole 310 of the battery cell 300 will form a vertical and continuous channel, which is conducive to the electrolyte being smoothly injected into the cavity 110 of the housing 100 and fully contacting with the battery cell 300, thereby ensuring that the battery cell 300 can fully react and exert its performance.

[0112] It is understandable that, in order to achieve sealing after the electrolyte is injected, a piston 550 can be provided on the third opening 521 (i.e., the injection port). After the injection is completed, the injection port is sealed by the piston 550 to ensure that the electrolyte inside the battery does not leak, and to prevent external impurities or moisture from entering the cavity 110 of the outer shell 100 and causing adverse effects on the performance and safety of the battery.

[0113] In some embodiments of the present application, Figure 6 and Figure 8 As shown, the cover plate assembly 200 also 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 fits tightly with the first opening 511 of the first pole 510, and is connected by welding, ensuring that the connection between the first pole 510 and other components inside the battery is safe and reliable. By providing the protective sheet 230 to seal the cavity 530 at the fourth opening 221 on the pole cover 220, moisture, dust or other impurities in the external environment can be prevented from entering the cavity 530.

[0114] 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 help enhance the current conduction capability. When the third opening 521 on the second pole 520 is provided with an explosion-proof valve 540, the protective sheet 230 can be connected to the fourth opening 221 on the pole cover 220 by bonding using a non-metallic material to ensure that the cavity 530 is sealed to 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 a short circuit or other reasons, the explosion-proof valve 540 provided on the third opening 521 will automatically open when the preset pressure threshold is reached, allowing the gas to be quickly released to reduce the pressure inside the battery. At this time, the protective sheet 230 can fall off under the action of air pressure to ensure that the gas can be discharged smoothly to prevent the battery from exploding.

[0115] It can be understood that a step structure can be provided at the fourth opening 221 on the pole cover 220, and the step structure is arranged on the inner edge of the fourth opening 221, and the step structure is arranged on the side of the pole cover 220 facing the cavity 530. The step structure can provide a stable support surface and precise positioning for installing the protective sheet 230.

[0116] In another possible implementation, when the third opening 521 on the second pole 520 is set as a liquid injection port, the pole cover 220 uses the same metal material as the first pole 510 to enhance the current conduction capability, and the pole cover 220 may not be provided with a fourth opening 221 for connecting the protective sheet 230. The one-piece pole cover 220 forms a seal on the cavity 530, 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 housing 100 from leaking.

[0117] In some embodiments of the present application, Figures 6 to 8 As shown, the battery further includes an insulating member 700, and an insulating member 700 is provided between the first pole 510 and the cover plate 210, and between the second pole 520 and the cover plate 210, and the first pole 510 and the cover plate 210, and the second pole 520 and the cover plate 210 are insulated by the insulating member 700. In this way, the insulation between the first pole 510 and the second pole 520 and the cover plate 210 is achieved by the insulating member 700, so that current short circuit or leakage can be avoided, and the battery can be ensured to operate stably and safely.

[0118] In some embodiments of the present application, Figure 8As shown, the insulating member 700 is provided with a through hole 710, and the cavity 530 is formed by the through hole 710. In this way, the through hole of the insulating member 700, the first opening 511 of the first pole 510, and the second opening 211 of the cover plate 210 form the cavity 530 together, which not only ensures the insulation between the first pole 510 and the cover plate 210, and the insulation between the second pole 520 and the cover plate 210, but also facilitates the convenience of the laser external penetration welding of the pole ear 600 and the collector plate 420.

[0119] In some embodiments of the present application, Figure 7 and Figure 8 As shown, the battery further includes a sleeve 810, which is located outside the connector 800, and the connector 800 and the cover plate 210 are insulated by the sleeve 810. In this way, the sleeve 810 can achieve insulation between the connector 800 and the cover plate 210, and can also provide mechanical protection for the connector 800. When the battery is subjected to external shock or vibration during use or transportation, the sleeve 810 can reduce the impact of external factors on the connector 800, ensuring that the connector 800 can stably connect the first pole 510 and the second pole 520.

[0120] In this application example, Figure 7 As shown, the sleeve 810 is arranged on the insulating member 700 between the first pole 510 and the cover plate 210, and a protrusion is arranged on the surface of the insulating member 700 facing the cavity 110, and the protrusion is extended to the top surface of the second pole 520, and the protrusion is the sleeve 810, and the insulation between the connecting member 800 and the cover plate 210 is achieved by the sleeve 810. 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 a protrusion is arranged on the surface of the insulating member 700 facing away from the cavity 110, and the protrusion is extended to the bottom surface of the first pole 510, and the protrusion is the sleeve 810, so as to achieve the insulation between the connecting member 800 and the cover plate 210.

[0121] For example, a combined sleeve 810 may be used, the first sleeve 810 may be disposed on the insulating member 700 between the first pole 510 and the cover plate 210, the insulating member 700 is provided with a protrusion on the side facing the cavity 110, and the protrusion is extended toward the top surface of the second pole 520, the second sleeve 810 may be disposed on the insulating member 700 between the second pole 520 and the cover plate 210, the insulating member 700 is provided with a protrusion on the side facing away from the cavity 110, and the protrusion is extended toward the bottom surface of the first pole 510, and the insulation between the connector and the cover plate 210 is achieved by splicing the first sleeve 810 and the second sleeve 810. The sleeve 810 may be made of rubber, plastic or other insulating materials, which is not limited in the embodiment of the present application and can be selected according to actual working conditions.

[0122] Among them, the terms "upper" and "lower" are used to describe the relative position relationship of each structure in the accompanying drawings, which is only for the convenience of description and is not used to limit the scope of implementation of the present application. Changes or adjustments to their relative relationships should also be regarded as the scope of implementation of the present application without substantially changing the technical content.

[0123] It should be noted that: in this application, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0124] In addition, in this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0125] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0126] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery, characterized in that: include: A housing (100), wherein the housing (100) has a cavity (110); A cover plate assembly (200), the cover plate assembly (200) comprising a cover plate (210) and a pole (500), the pole (500) being 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); 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) away from the cavity (110), the second pole (520) being located on a side of the cover plate (210) facing the cavity (110), the first pole (510) and the second pole (520) being connected via a connecting piece (800); A battery cell (300), the battery cell (300) being located in the cavity (110), and a pole ear (600) being provided at at least one end of the battery cell (300); A current collecting assembly (400), the current collecting assembly (400) being located between the cover plate assembly (200) and the battery cell (300), the current collecting assembly (400) comprising a current collecting plate (420) and a current guiding bridge (410), the current collecting plate (420) being connected to the pole lug (600); the current guiding bridge (410) being arranged on the current collecting plate (420), a part of the current guiding bridge (410) being raised away from the current collecting plate (420) to form a buffer platform (411), the bottom surface of the second pole (520) being connected to the buffer platform (411), the current guiding bridge (410) further comprising a connecting portion (412), the current guiding bridge (410) being connected to the current collecting plate (420) via the connecting portion (412); The buffer platform (411) of the guide bridge (410) is provided with a first opening (413), and the first opening (413) is arranged opposite to the central hole (310) on the battery cell (300); the current collecting plate (420) is provided with a second opening (423); the second pole (520) is provided with a third opening (521); the third opening (521) is connected to the cavity (110) through the first opening (413) and the second opening (423) in sequence; and the third opening (521) is used for installing an explosion-proof valve (540); Alternatively, the third opening (521) is a liquid injection port, and electrolyte is injected into the cavity (110) through the third opening (521), and a piston (550) is provided on the liquid injection port, and the piston (550) is used to seal the liquid injection port.

2. The battery according to claim 1, characterized in that The second opening (423) is located below the first opening (413), and the first opening (413), the second opening (423) and the central hole (310) on the battery core (300) are arranged opposite to each other.

3. The battery according to claim 2, characterized in that The collecting plate (420) is provided with a plurality of third openings (424), and the plurality of third openings (424) are located around the second openings (423).

4. The battery according to claim 3, characterized in that The projection of the connecting portion (412) towards the current collecting plate (420) is staggered with the third opening (424).

5. The battery according to any one of claims 1 to 4, characterized in that: The current collecting plate (420) is integrally stamped to form a convex pattern (421) protruding toward the pole lug (600), and the pole lug (600) is connected to the current collecting plate (420) via the convex pattern (421).

6. The battery according to any one of claims 1 to 4, characterized in that: The outer edge of the current collecting plate (420) also has a bending portion (422), the bending portion (422) is bent towards the flow guiding bridge (410), and one end of the connecting portion (412) is in contact with the bending portion (422).

7. The battery according to claim 6, characterized in that The height of the bent portion (422) is h, and 0.3 mm ≤ h ≤ 3.0 mm.

8. The battery according to claim 6, characterized in that The bent portion (422) and the raised convex patterns (421) on the current collecting plate (420) are staggered in the circumferential direction of the current collecting plate (420).

9. The battery according to claim 1, characterized in that The first pole (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 partial area on the second pole (520) is exposed at the cavity (530).

10. The battery according to claim 9, characterized in that The second pole (520) has a welding area (522), and the welding area (522) is exposed at the cavity (530).

11. The battery according to claim 10, characterized in that The second pole (520) is integrally stamped to form a groove (523) in the welding area (522); the groove (523) is connected to the cavity (530); the shortest distance between the bottom of the groove (523) and the bottom surface of the second pole (520) is d, and 0.3 mm≤d≤1.3 mm.

12. The battery according to claim 1, characterized in that The third opening (521) is arranged opposite to the first opening (413) of the guide bridge (410), the second opening (423) of the current collecting plate (420), and the central hole (310) on the battery cell (300).

13. The battery according to any one of claims 9 to 11, characterized in that: The cover plate assembly (200) further comprises a pole cover (220) and a protective sheet (230), wherein 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), the protection sheet (230) is located on the fourth opening (221), and the protection sheet (230) is used to seal the cavity (530).

14. The battery according to claim 1, characterized in that The invention also comprises an insulating member (700), wherein the insulating member (700) is provided between the first pole (510) and the cover plate (210), and between the second pole (520) and the cover plate (210); the first pole (510) and the cover plate (210), and the second pole (520) and the cover plate (210) are insulated by the insulating member (700).

15. The battery according to claim 14, characterized in that The insulating member (700) is provided with a through opening (710), and a cavity (530) is formed through the through opening (710).

16. The battery according to any one of claims 1, characterized in that: It also includes a sleeve (810), the sleeve (810) being located outside the connecting piece (800), and the connecting piece (800) and the cover plate (210) being insulated by the sleeve (810).

17. A battery pack, characterized in that: include: The battery according to any one of claims 1 to 16.

18. An electrical equipment, characterized in that: include: An electrical device, and the battery pack as described in claim 17 or the battery as described in any one of claims 1 to 16, wherein the battery pack or the battery is used to provide electrical energy to the electrical device.

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