Battery pole structure, battery cover plate assembly, battery, battery pack and electric equipment

Abstract

The utility model provides a battery pole structure, a battery cover plate assembly, a battery, a battery pack and electric equipment, and relates to the technical field of batteries. Wherein at least part of the pole column penetrates through the through hole of the cover plate, the pole column is connected with the cover plate in an insulating manner, a concave space is formed in one surface, facing a pole core of the battery, of the pole column, and at least part of a pole lug of the battery extends into the concave space. Therefore, the sinking concave space of the pole can not only reduce the overall weight and achieve cost reduction and efficiency improvement, the pole penetrates through the through hole in the cover plate to ensure that the pole lug can be close to one surface, provided with the concave space, of the pole and is connected with the convex structure arranged in the concave space when the pole lug is welded with the pole, and the welding quality is improved.

Description

TECHNICAL FIELD

[0001] The embodiments of the present application relate to the technical field of batteries, in particular to a battery pole structure, a battery cover plate assembly, a battery, a battery pack and an electric equipment. BACKGROUND

[0002] With the continuous progress of power 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 for measuring battery performance.

[0003] In a conventional lithium ion battery, a soft connection is usually used for transition between the tab and the cover plate, a protection sheet is arranged on the tab, and the protection sheet on the tab is connected to the pole on the cover plate through a transition sheet. However, the arrangement of the protection sheet and the transition sheet not only increases the overall weight of the battery, but also compresses the originally limited space inside the battery, reduces the energy density of the battery, has many parts, and is complex to operate, which is not convenient for subsequent welding operation. CONTENT OF THE UTILITY MODEL

[0004] The embodiments of the present application provide a battery pole structure, a battery cover plate assembly, a battery, a battery pack and an electric equipment, which thin a part of the area of the pole to form a sunken recess space, achieve the goal of weight reduction and cost reduction. Moreover, the contact resistance is reduced, and the possibility of false welding is reduced. The manufacturing cost of the battery is reduced, and the efficiency of subsequent welding operation is improved.

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

[0006] First, the embodiments of the present application provide a battery pole structure, comprising:

[0007] The pole is provided with a recess space on at least one side, and the recess space is used for the at least part of the tab of the battery to extend into.

[0008] The embodiments of the present application have the following beneficial effects: the battery pole structure provided by the embodiments of the present application comprises a pole, wherein a recess space is arranged on at least one side of at least part of the pole, and the recess space is used for the at least part of the tab of the battery to extend into. In this way, the sunken recess space of the pole not only reduces the overall weight of the battery, realizes cost reduction and efficiency increase, but also facilitates the tab to extend into the recess space, ensures the welding operation between the tab and the pole, is conducive to the operation of the welding operation, improves the utilization of the internal space of the battery, improves the welding quality, and ensures the reliability of the connection.

[0009] In a possible implementation, a protruding structure is arranged at the bottom area of the recess space, and the protruding structure is used for connecting with the tab.

[0010] In a possible implementation, the maximum depth of the recessed space on the pole column is H, the maximum height of the protruding structure is h, and h≤H.

[0011] In a possible implementation, the maximum depth H of the recessed space on the pole column satisfies the requirement of 0<H<5.0 mm.

[0012] In a possible implementation, the height h of the protruding structure satisfies the requirement of 0<h<2.0 mm.

[0013] In a possible implementation, an extension structure is arranged on the outer circumferential surface of the pole column, and the extension structure is arranged on the side of the pole column away from the recessed space.

[0014] In a possible implementation, the pole column includes a first pole column and a second pole column, and the first pole column and the second pole column are integrally formed or are connected by welding.

[0015] The recessed space is arranged on one side of the first pole column, and the second pole column is arranged on the other side of the first pole column and protrudes in a direction away from the recessed space.

[0016] In a possible implementation, a plurality of second pole columns are arranged at intervals on the side of the pole column away from the recessed space.

[0017] In a possible implementation, the inner wall of the recessed space includes a bottom region and an annular side wall arranged around the bottom region, and the bottom region and the annular side wall enclose the recessed space.

[0018] Alternatively, the inner wall of the recessed space includes a bottom region and oppositely arranged first and second side walls, and the bottom region, the first side wall, and the second side wall enclose the recessed space.

[0019] In a possible implementation, the protruding structure is a boss protruding from at least part of the bottom region of the recessed space towards the pole core, and one face of the boss protruding towards the pole core is connected to the tab.

[0020] In a possible implementation, the protruding structure is a plurality of hemispherical protrusions protruding from at least part of the bottom region of the recessed space towards the pole core, and the plurality of protrusions are used to be connected to the tab.

[0021] Alternatively, the protruding structure is a column type, a cylinder type, a cone type, a truncated cone type, a semi-ellipsoid type, or the like.

[0022] In a second part, the embodiments of the present application provide a battery cover plate assembly, which comprises:

[0023] The cover plate and the battery pole structure as described above;

[0024] The cover plate is provided with a through hole, at least part of the pole of the battery pole structure passes through the through hole of the cover plate, and the pole is insulated from the cover plate.

[0025] In a possible implementation, a first insulation part is arranged on one side of the cover plate, and the cover plate and the tab of the battery are insulated from each other through the first insulation part.

[0026] In a possible implementation, the first insulation part is provided with a first opening, and the first opening is arranged opposite to the through hole on the cover plate.

[0027] In a possible implementation, a second insulation part is arranged on the other side of the cover plate, and the cover plate and the pole are insulated from each other through the second insulation part.

[0028] In a possible implementation, the second insulation part is provided with a second opening, and the second opening is arranged opposite to the through hole on the cover plate.

[0029] In a possible implementation, a third insulation part is further included, one end of the third insulation part is connected to the first opening of the first insulation part, and the other end of the third insulation part is connected to the second opening of the second insulation part.

[0030] The outer side wall of the third insulation part is fitted to the inner side wall of the through hole, so that the pole is insulated from the cover plate through the through hole.

[0031] In a possible implementation, a groove is arranged on the side of the first insulation part away from the pole, and the groove is located at the first opening.

[0032] In a possible implementation, part of the side wall of the groove is connected to the first side wall of the recessed space of the pole.

[0033] In a possible implementation, part of the side wall of the groove is further connected to the second side wall of the recessed space.

[0034] In a possible implementation, the groove bottom of the groove is flush with the bottom area of the recessed space.

[0035] The third part provides a battery, including:

[0036] The shell, the pole core, and the battery cover plate assembly as described above;

[0037] The shell is a cavity with an opening;

[0038] The pole core is located in the cavity of the shell, and at least one end of the pole core is provided with the tab;

[0039] The cover of the battery cover plate assembly covers the opening of the shell, and the tab is connected with the pole column of the battery cover plate assembly.

[0040] In a possible implementation, the recessed space of the pole column has at least one welding area, and the welding area is arranged at the bottom region of the recessed space;

[0041] The tab is connected with the pole column through the welding area.

[0042] In a possible implementation, at least part of the tab is located in the recessed space, and the tab is connected with the protruding structure of the pole column.

[0043] In a possible implementation, the tab is connected to the recessed space through resistance welding.

[0044] In the fourth part, the embodiment of the present application provides a battery pack, comprising:

[0045] The battery described above;

[0046] Or the battery cover plate assembly described above;

[0047] Or the battery pole column structure described above.

[0048] In the fifth part, the embodiment of the present application provides a power consuming device, comprising:

[0049] The power consuming device and the battery pack described above;

[0050] Or the battery described above, the battery pack or the battery is used to provide electric energy for the power consuming device.

[0051] In addition to the technical problems solved by the present application described above, the technical features constituting the technical solutions and the beneficial effects brought by these technical features, the other technical problems solved by the battery pole column structure, the battery cover plate assembly, the battery, the battery pack and the power consuming device provided by the present application, the other technical features contained 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

[0052] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the description of the embodiments of the present application or the prior art. Obviously, the drawings in the following description are only some of the embodiments of the present application, and these drawings and the description are not intended to limit the scope of the present application in any way, but to explain the present application to those skilled in the art by reference to the specific embodiments. Those skilled in the art can obtain other drawings according to these drawings without any creative effort.

[0053] Figure 1 A structural schematic diagram of a battery cover plate assembly provided by an embodiment of the present application;

[0054] Figure 2 An exploded view of a battery cover plate assembly provided by an embodiment of the present application;

[0055] Figure 3 A sectional view of a battery cover plate assembly provided by an embodiment of the present application;

[0056] Figure 4 A structural schematic diagram of another battery cover plate assembly provided by an embodiment of the present application;

[0057] Figure 5 An exploded view of another battery cover plate assembly provided by an embodiment of the present application;

[0058] Figure 6 A sectional view of another battery cover plate assembly provided by an embodiment of the present application;

[0059] Figure 7 An exploded view of still another battery cover plate assembly provided by an embodiment of the present application;

[0060] Figure 8 A sectional view of still another pole provided by an embodiment of the present application.

[0061] Explanation of reference signs:

[0062] 100 - cover plate; 110 - through hole; 120 - through hole;

[0063] 200 - pole; 201 - first pole; 202 - second pole; 203 - sealing member; 204 - terminal;

[0064] 210 - recessed space; 211 - first side wall; 212 - second side wall; 213 - third side wall;

[0065] 220 - protruding structure; 220a - boss; 220b - bump;

[0066] 230 - extending structure;

[0067] 310 - first insulation part; 311 - first opening; 312 - groove; 313 - hole;

[0068] 320 - second insulation part; 321 - second opening;

[0069] 330 - third insulation part;

[0070] 400 - tab. DETAILED DESCRIPTION

[0071] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with 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 other embodiments obtained by a person of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0072] The embodiments of the present application provide a power-using device, which comprises a power-using apparatus and a battery pack or a battery. The battery pack or the battery provides electric energy for the power-using apparatus. For example, the power-using device can be a vehicle or an energy storage device. When the power-using device is a vehicle, the vehicle can be an electric vehicle, an electric automobile, a fuel vehicle, or a hybrid vehicle. The power-using apparatus can be an electric motor, a control system, an illumination system, or the like. When the power-using device is an energy storage device, the power-using apparatus can be an inverter, a controller, or the like. The battery pack can comprise a plurality of batteries, and the plurality of batteries can store and output electric energy through a certain connection mode and a control system. The electric energy provided by the battery pack or the battery can be used to meet the normal operation of the device.

[0073] The embodiments of the present application provide a battery, which comprises a shell, a pole core, and a battery cover plate assembly. The shell is a cavity with an opening. The pole core is located in the cavity of the shell, and at least one end of the pole core is provided with a tab. The cover plate of the cover plate assembly covers the opening of the shell, and the tab is connected with a pole column of the battery cover plate assembly.

[0074] The pole core is used to store and release electric energy. The pole core is provided with a tab at both ends. The pole core and the cover plate assembly are connected through the tab, so that the electric current generated by the pole core is transmitted to the cover plate assembly through the tab, thereby providing power supply function for the external circuit connected with the cover plate assembly.

[0075] It can be understood that the shell has a cavity for accommodating the pole core and other components of the battery, and the two ends of the shell are connected with the battery cover plate assembly. The shell can provide physical protection for the pole core and other components of the battery, preventing the pole core and other components of the battery from being mechanically damaged by external vibration, impact, etc. The battery cover plate assembly can ensure that the pole core and other components of the battery 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.

[0076] It should be noted that the shell can be made of aluminum, copper, but is not limited to the above metal materials, for example, it can also be made of stainless steel or other alloy materials, which will not be described here. The material of the shell can be selected according to the actual working conditions.

[0077] The embodiment of the application provides a cover plate assembly, as shown in Figure 1 and Figure 3 The cover plate 100 is provided with a through hole 110, and at least part of the pole column 200 of the battery pole column structure is arranged in the through hole 110 and is insulated and connected with the cover plate 100. The pole column 200 is provided with a recessed space 210 on the side facing the pole core of the battery, and the recessed space 210 is used for the at least part of the tab 400 of the battery to extend into.

[0078] In this way, the pole column 200 is provided with a recessed space 210 on the side facing the pole core, which can accommodate at least part of the tab 400 of the battery, and the tab 400 is connected with the pole column 200. The space inside the battery is reasonably utilized, and the utilization rate of the space inside the battery is improved. The thickness of the material of the pole column 200 at the position of the recessed space 210 can be reduced, the overall weight of the pole column 200 can be reduced, the use amount of raw materials of the pole column 200 can be reduced, and cost saving can be realized.

[0079] The tab 400 on the pole core extends into the recessed space 210 of the pole column 200 and is connected with the bottom region of the recessed space 210. It should be noted that the tab 400 of the pole core can be connected with the bottom region of the recessed space 210 by resistance welding, or laser penetration welding, or ultrasonic welding. The selection of the welding process can be selected according to the manufacturing conditions of the battery.

[0080] The cover plate 100 is connected with the end of the shell, and the cavity in the shell can be sealed through the cover plate 100, effectively protecting the pole core, the tab 400 and other components in the cavity. The through hole 110 on the cover plate 100 can accommodate part of the pole column 200, realize the connection between the pole column 200 and the cover plate 100, ensure the stability of the pole column 200, and improve the space utilization rate in the cavity of the shell.

[0081] It should be noted that in the example of the present application, the through-opening 110 on the cover plate 100 is a rectangular through-opening 110, but is not limited to a rectangle. For example, it can also be a circular, quasi-circular, or other shape. The shape and size of the through-opening 110 are compatible with the pole 200. The cover plate 100 can be made of the same metal material as the outer shell, such as aluminum, copper, stainless steel, or other alloy materials. The cover plate 100 can also be made of a different metal material from the outer shell. The materials of the outer shell and the cover plate 100 can be selected based on actual working conditions.

[0082] In some embodiments of the present application, a raised structure 220 is provided in the bottom region of the recessed space 210. The raised structure 220 is used to connect to the tab 400. This can enhance the connection between the electrode 200 and the tab 400, and improve the stability and reliability of the connection between the tab 400 and the electrode 200. During the welding process of the electrode 200 and the tab 400, the raised structure 220 in the bottom region of the recessed space 210 can serve as an energy concentration area, reducing the possibility of cold welds and broken welds.

[0083] In one possible implementation, Figure 2 As shown, the raised structure 220 is a boss 220a that protrudes from a portion of the bottom area of ​​the recessed space 210 toward the electrode core, and the side of the boss 220a facing the electrode core is connected to the tab 400. The tab 400 is connected to the electrode post 200 via the boss 220a. During the welding process, the boss 220a can serve as an energy concentration area to ensure effective heat and pressure conduction, reduce the occurrence of welding defects such as cold welds and broken welds, and ensure the uniformity and reliability of the welding between the tab 400 and the electrode post 200.

[0084] It should be noted that in the example of the present application, the boss 220a can be a round boss, a square boss, or an elliptical boss, and the edges of the boss 220a are passivated or chamfered to prevent the sharp edges of the boss 220a from scratching the tab 400 during welding between the tab 400 and the boss 220a. The shape and size of the boss 220a can be optimized for the welding effect of the tab 400. The boss 220a can be integrally stamped on the pole 200, or it can be welded to the recessed space 210 of the pole 200.

[0085] In another possible implementation, Figure 5As shown, the protruding structure 220 is a plurality of protrusions 220b protruding from the partial bottom region of the recessed space 210 toward the pole core, and the plurality of protrusions 220b are used to connect with the tab 400. The tab 400 can also be connected with the pole 200 through the plurality of protrusions 220b, which serve as energy concentration sites during the welding process to achieve sufficient welding, which helps to ensure that heat and pressure are more evenly distributed during the welding process, thereby improving the welding quality.

[0086] In the examples of the present application, the number of protrusions 220b is fifteen, but is not limited to fifteen. The number and position of the protrusions 220b can be flexibly set to meet the connection requirements of different shapes and sizes of the tab 400.

[0087] It can be understood that the contact between the plurality of protrusions 220b and the tab 400 can reduce the possibility of a virtual weld caused by poor welding of a single protrusion 220b with the tab 400. If one of the protrusions 220b is not fully welded, the other protrusions 220b can still maintain stable connection with the tab 400, thereby ensuring the reliability of the connection between the tab 400 and the pole 200. It should be noted that the surface of the protrusion 220b can be smoothed to ensure that the protrusion 220b does not damage the surface of the tab 400 during connection. The tab 400 is a hemispherical structure, but is not limited to the above shape. For example, it can also be a column, a cylinder, a cone, a truncated cone, a semi-elliptical sphere, or other shapes.

[0088] In the examples of the present application, the recessed space 210 of the pole 200 has at least one welding area, which is arranged at the bottom region of the recessed space 210. The tab 400 is connected with the pole 200 through the welding area. It should be noted that the welding area can be the area range of the abovementioned boss 220a, and the welding area can also be the area range of the array of the plurality of protrusions 220b. It can be understood that the welding area of the recessed space 210 of the pole 200 is conducive to the resistance welding connection of the tab 400 and the pole 200, and ensures the reliability of the connection between the pole 200 and the tab 400.

[0089] As shown in some embodiments of the present application, Figure 3 and Figure 6 As shown, the maximum depth of the recessed space 210 on the pole 200 is H, and the height of the protruding structure 220 is h, and h≤H. The maximum depth H of the recessed space 210 on the pole 200 satisfies 0<H<5.0 mm, for example, it can be 0.5 mm, 2.5 mm, or 4.9 mm, etc. The height h of the protruding structure 220 satisfies 0<h<2.0 mm, for example, it can be 0.1 mm, 0.5 mm, or 1.5 mm, etc.

[0090] If the maximum depth H of the recessed space 210 is too large, for example, when H is greater than 5.0 mm, the space for accommodating the tab 400 increases, but as the maximum depth H of the recessed space 210 increases, the difficulty and cost of manufacturing the recessed space 210 of the terminal 200 also increase. Furthermore, as the thickness of the terminal 200 decreases, the mechanical properties such as bending and torsional resistance at the location of the recessed space 210 decrease, which reduces the structural strength of the terminal 200 and makes it difficult to withstand internal battery pressure or external battery impact, resulting in deformation or fracture.

[0091] In one possible implementation, when the raised structure 220 is a boss 220a, the height of the boss 220a is h, and h≤H. In another possible implementation, when the raised structure 220 is a plurality of protrusions 220b, the height of each protrusion 220b is h, and h≤H. It can be understood that when h<H, the space within the recessed space 210 to accommodate the tab 400 will be correspondingly increased. When h=H, the height of the raised structure 220 is equal to the maximum depth of the recessed space 210, and the top surface of the raised structure 220 is flush with the top surface of the side of the pole 200 where the recessed space 210 is provided, which can provide higher stability and reliability during the welding process between the raised structure 220 and the tab 400.

[0092] In some embodiments of the present application, Figure 2 and Figure 3 As shown, Figure 5 and Figure 6 As shown, an extension structure 230 is provided on the outer peripheral surface of the pole 200. The extension structure 230 is arranged on the side of the pole 200 facing away from the recessed space 210. The extension structure 230 covers the outer edge of the through-hole 110 of the cover plate 100, and the extension structure 230 is insulated and connected to the cover plate 100. In this way, the extension structure 230 can cover the outer edge of the through-hole 110 on the cover plate 100. The extension structure 230 can provide additional mechanical support, enhance the connection strength between the pole 200 and the cover plate 100, and prevent the battery from being loosened or falling off due to vibration or impact from the external environment during use. The extension structure 230 can also fit tightly with the cover plate 100 to form an effective seal to prevent electrolyte or other liquids from leaking from the inside of the battery.

[0093] It should be noted that the extension structure 230 can be made of the same metal material as the pole 200, so as to increase the contact area on the side of the pole 200 facing away from the recessed space 210, and ensure good electrical conductivity and thermal conductivity between the extension structure 230 and the pole 200. During the charging and discharging process of the battery, the pole 200 will generate heat, and increasing the contact area of the pole 200 will help the heat to be more effectively dissipated to the external environment, reduce the temperature of the battery, and improve the safety and service life of the battery. The extension structure 230 and the pole 200 can be integrally stamped, or can also be formed by welding between the extension structure 230 and the pole 200, which is not limited here. The size, forming method and material of the welded structure can be adjusted according to the actual working condition requirements.

[0094] In some embodiments of the present application, in combination with Figure 7 and Figure 8 As shown, the pole 200 includes a first pole 201 and a second pole 202, and the first pole 201 and the second pole 202 are integrally formed, or the first pole 201 and the second pole 202 are connected by welding. The second pole 202 is arranged on the side of the pole 200 facing away from the recessed space 210, and protrudes along the side facing away from the recessed space 210.

[0095] For example, the pole 200 has one first pole 201 and two second poles 202, and the two second poles 202 are connected with the first pole 201. The recessed space 210 of the first pole 201 is provided with two areas of protruding structure 220, which is schematically shown as a bump 220b, but is not limited to the bump 220b, and the protruding structure 220 can also be a boss 220a. And each second pole 202 is arranged on the side of the pole 200 facing away from the recessed space 210. That is, each second pole 202 is connected with the back of the bump 220b of one area. It should be noted that the first pole 201 and the second pole 202 can be integrally formed, or the first pole 201 and the second pole 202 can be connected by welding, which is not limited here.

[0096] It can be understood that the pole column 200 is not provided with the extension structure 230, and the pole column 200 is composed of the first pole column 201 and the second pole column 202, which can reduce the weight of the battery. The first pole column 201 and the second pole column 202 are integrally formed or welded, which can simplify the production process and reduce the processing difficulty of the pole column 200. The plurality of second pole columns 202 are arranged at intervals on the side away from the recess space 210, which can increase the flow area of the battery and improve the charge-discharge performance and energy density of the battery. The plurality of second pole columns 202 can also increase the heat dissipation area inside the battery pack, which is beneficial to the rapid dissipation of heat and improves the thermal management performance of the battery pack. It should be noted that the number of the second pole column 202 can be two, but is not limited to two, and the number of the second pole column 202 can be adjusted according to the actual working condition.

[0097] Please continue to refer to Figure 7 and Figure 8 The second pole column 202 is composed of two parts, namely the second pole column 202a and the second pole column 202b, and the second pole column 202a and the second pole column 202b are connected and penetrate the through hole 110 of the cover plate 100. It can be understood that, in order to avoid short circuit caused by the contact between the second pole column 202 and the cover plate 100, a sealing member 203 can be provided, that is, the sealing member 203 is the third insulation part 330. In order to avoid short circuit caused by the contact between the terminal 204 connected to the pole column 200 by welding or riveting and the cover plate 100, a second insulation part 320 can be provided.

[0098] In some embodiments of the present application, the inner wall of the recess space 210 includes a bottom region and an annular side wall surrounding the periphery of the bottom region, and the bottom region and the annular side wall surround the recess space 210. Alternatively, as shown in Figure 2 , the inner wall of the recess space 210 includes a bottom region, oppositely arranged first and second side walls 211 and 212, and third side walls 213 connected to the first and second side walls 211 and 212, respectively, and the bottom region, the first and second side walls 211 and 212, and the third side walls 213 surround the recess space 210 which is open at one end. Alternatively, as shown in Figure 5 , the inner wall of the recess space 210 includes a bottom region and oppositely arranged first and second side walls 211 and 212, and the bottom region, the first and second side walls 211 and 212 surround the recess space 210 which is open at both ends. The inner wall of the recess space 210 can be any of the above, and the examples of the present application are not limited. It can be understood that, on the basis of ensuring the structural strength of the pole column 200, the fewer the inner walls of the recess space 210, the larger the space for accommodating the tab 400 in the recess space 210, and the lighter the weight of the pole column 200.

[0099] In some embodiments of the present application, as shown in Figure 2 and Figure 3 ,Figure 5 and Figure 6 As shown in FIG. 1, the battery cover plate 100 assembly further comprises a first insulating part 310, which is located on the side of the cover plate 100 facing the core, and the cover plate 100 and the tab 400 are insulated from each other through the first insulating part 310. The battery cover plate 100 assembly further comprises a second insulating part 320, which is located on the side of the cover plate 100 away from the core, and the cover plate 100 and the pole 200 are insulated from each other through the second insulating part 320.

[0100] It can be understood that the first insulating part 310 and the second insulating part 320 are respectively located on both sides of the cover plate 100, wherein the first insulating part 310 is arranged on the side of the cover plate 100 facing the core, to ensure the insulation between the tab 400 and the side of the cover plate 100 facing the core, and prevent the tab 400 from contacting the cover plate 100 to cause short circuit. The second insulating part 320 is arranged on the side of the cover plate 100 away from the core, to ensure the insulation between the pole 200 and the side of the cover plate 100 away from the core, and prevent the pole 200 from contacting the cover plate 100 to cause short circuit.

[0101] In some embodiments of the present application, please continue to refer to Figure 2 and Figure 3 , Figure 5 and Figure 6 The first insulating part 310 is provided with a first opening 311, and the first opening 311 is arranged opposite to the through hole 110 on the cover plate 100. The second insulating part 320 is provided with a second opening 321, and the second opening 321 is arranged opposite to the through hole 110 on the cover plate 100. The first opening 311, the second opening 321, the through hole 110 and the recessed space 210 form a cavity, and the tab 400 is located in the cavity. In this way, the tab 400 can pass through the first opening 311 on the first insulating part 310 and the second opening 321 on the second insulating part 320, enter the recessed space 210 of the pole 200, and be connected with the protruding structure 220 (the boss 220a or the plurality of protrusions 220b) in the recessed space 210.

[0102] In the example of the present application, the first opening 311 on the first insulating part 310 and the second opening 321 on the second insulating part 320 are arranged opposite to the through hole 110 on the cover plate 100, and the shapes, positions and sizes of the first opening 311, the second opening 321 and the through hole 110 are consistent, which can ensure that the tab 400 can maintain a smooth path when passing through the first opening 311, the second opening 321 and the through hole 110, and avoid obstacles to cause poor connection between the tab 400 and the protruding structure 220. It should be noted that the positions and shapes of the first opening 311 and the second opening 321 can be adjusted according to the actual working condition of the battery application and performance requirements.

[0103] In some embodiments of the present application, Figure 3 and Figure 6 As shown, the battery cover 100 assembly further includes a third insulating portion 330, one end of which is connected to the first opening 311 of the first insulating portion 310, and the other end of which is connected to the second opening 321 of the second insulating portion 320. The outer wall of the third insulating portion 330 is in contact with the inner wall of the through-opening 110, so that the tab 400 passing through the through-opening 110 is insulated from the cover 100. This ensures the insulation effect of the tab 400 when passing through the through-opening 110 on the cover 100, thereby ensuring the safety and reliability of the battery.

[0104] The ends of the third insulating portion 330 are connected to the first opening 311 of the first insulating portion 310 and the second opening 321 of the second insulating portion 320, respectively, ensuring that the third insulating portion 330 is tightly connected between the first insulating portion 310 and the second insulating portion 320, forming a complete insulating structure. The outer wall of the third insulating portion 330 is aligned with the inner wall of the through-opening 110 in the cover plate 100, enhancing the insulation effect and ensuring that the tab 400 does not come into contact with the through-opening 110 of the cover plate 100 when passing through the through-opening 110, thereby fully isolating the tab 400 from the cover plate 100.

[0105] It should be noted that the first insulating portion 310, the second insulating portion 320, and the third insulating portion 330 can be formed by integral stamping or non-integrated molding, without limitation. The first insulating portion 310, the second insulating portion 320, and the third insulating portion 330 can be made of rubber, plastic, or other insulating materials, and the choice can be based on actual working conditions.

[0106] In some embodiments of the present application, Figures 4 to 6 As shown, a groove 312 is provided on the surface of the first insulating portion 310 facing away from the terminal 200. The groove 312 is located at the first opening 311, and both ends of the groove 312 are open. Thus, by providing the groove 312, the volume of material required for the first insulating portion 310 is reduced, further reducing the weight of the entire battery cover 100 assembly, and optimizing the cavity structure space of the battery housing to accommodate the battery tab 400. It should be noted that the position, shape, and size of the groove 312 must meet the functional requirements of the first insulating portion 310 to ensure its stability and reliability.

[0107] In some embodiments of this application, please refer to Figure 4Part of the sidewall of the groove 312 is connected to the first sidewall 211 of the recessed space 210, and part of the sidewall of the groove 312 is also connected to the second sidewall 212 of the recessed space 210. The bottom of the groove 312 is flush with the bottom area of ​​the recessed space 210. This not only reduces the weight of the overall structure of the battery cover 100 assembly, but also provides a smoother and more compact connection space for the tab 400, reducing bending of the tab 400 within the recessed space 210.

[0108] contrast Figure 1 and Figure 3 As shown, the first insulating portion 310 is provided with a groove 312, and the bottom of the groove 312 is flush with the bottom area of ​​the recessed space 210 of the electrode 200, forming a flat connection surface. It will be appreciated that the flat connection surface can prevent scratches on the tab 400, protecting the integrity and conductivity of the tab 400. Furthermore, the flat connection surface facilitates the connection between the tab 400 and the raised structure 220, making welding easier for operators.

[0109] In some embodiments of the present application, Figure 2 and Figure 5 As shown, the cover plate 100 is provided with a through hole 120, and the through hole 120 is located on one side of the through opening 110. The first insulating portion 310 is also provided with an opening 313, and the opening 313 is arranged opposite to the through hole 120. In this way, the electrolyte can be injected into the cavity of the shell through the through hole 120 and the opening 313, and the electrolyte is in full contact with the pole core, thereby ensuring that the pole core can fully react and perform its performance. Alternatively, an explosion-proof valve is installed at the through hole 120. When a short circuit occurs inside the battery under extreme circumstances, the pressure in the battery cavity rises sharply. The explosion-proof valve located at the through hole 120 and the opening 313 can respond quickly and open, effectively releasing the internal pressure of the cavity and preventing the battery shell from rupturing or exploding.

[0110] It should be noted that in the present example, both the through hole 120 and the opening 313 are circular holes, but are not limited to circular holes. For example, they can also be rectangular or quasi-circular. The shape and size of the through hole 120 and the opening 313 can be adjusted according to functional requirements.

[0111] 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 this application. Changes or adjustments to their relative relationships should also be regarded as the scope of implementation of this application without substantially changing the technical content.

[0112] It should be noted that in the present application, unless specifically defined and limited, the first feature is "on" or "under" the second feature, which can be direct contact or indirect contact through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0113] In addition, in the present application, unless specifically defined and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be broadly understood, for example, it can be fixed connection, or detachable connection, or integrated; it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0114] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example" 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 the present application, 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.

[0115] 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 that the technical solutions recorded in the foregoing embodiments can be modified, or some or all of the technical features can be replaced by equivalents; 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 battery pole structure, characterized in that: include: A pole (200) is provided with a recessed space (210) on at least one side of the pole (200), and the recessed space (210) is used for allowing at least a portion of a pole lug (400) of a battery to extend therein.

2. The battery terminal structure according to claim 1, characterized in that: A protruding structure (220) is provided in the bottom area of ​​the recessed space (210), and the protruding structure (220) is used to be connected to the tab (400).

3. The battery terminal structure according to claim 2, characterized in that: The maximum depth of the recessed space (210) on the pole (200) is H, the maximum height of the protruding structure (220) is h, and h≤H.

4. The battery terminal structure according to claim 3, characterized in that: The maximum depth H of the recessed space (210) meets the following requirement: 0<H<5.0mm.

5. The battery terminal structure according to claim 3, characterized in that: The height h of the protruding structure (220) meets the following requirement: 0<h<2.0mm.

6. The battery terminal structure according to any one of claims 1 to 5, characterized in that: An extension structure (230) is provided on the outer peripheral surface of the pole (200), and the extension structure (230) is arranged on a side of the pole (200) facing away from the recessed space (210).

7. The battery terminal structure according to any one of claims 1 to 5, characterized in that: The pole (200) comprises a first pole (201) and a second pole (202), wherein the first pole (201) and the second pole (202) are an integrally formed structure, or the first pole (201) and the second pole (202) are connected by welding; The recessed space (210) is provided on one side of the first pole (201), and the second pole (202) is provided on the other side of the first pole (201) and protrudes in a direction away from the recessed space (210).

8. The battery terminal structure according to claim 7, characterized in that: A plurality of second poles (202) are arranged at intervals on a side of the pole (200) away from the recessed space (210).

9. The battery terminal structure according to any one of claims 1 to 5, characterized in that: The inner wall of the recessed space (210) includes a bottom area and an annular side wall arranged around the bottom area, and the bottom area and the annular side wall enclose the recessed space (210); Alternatively, the inner wall of the recessed space (210) includes the bottom area and a first side wall (211) and a second side wall (212) that are arranged opposite to each other, and the bottom area, the first side wall (211) and the second side wall (212) enclose the recessed space (210).

10. The battery terminal structure according to any one of claims 2 to 5, characterized in that: The raised structure (220) is a boss (220a) that is raised from at least a portion of the bottom area of ​​the recessed space (210), and the boss (220a) is connected to the tab (400).

11. The battery terminal structure according to any one of claims 2 to 5, characterized in that: The protruding structure (220) is a plurality of hemispherical protrusions (220b) protruding from at least a portion of the bottom area of ​​the recessed space (210), and the plurality of protrusions (220b) are used to connect to the tab (400); Alternatively, the protruding structure is a columnar, cylindrical, conical, truncated cone, or semi-ellipsoidal structure.

12. A battery cover assembly, characterized in that: include: A cover plate (100), and a battery pole structure according to any one of claims 1 to 11; The cover plate (100) is provided with a through-hole (110), at least part of the poles (200) of the battery pole structure pass through the through-hole (110) of the cover plate (100), and the poles (200) are insulated from the cover plate (100).

13. The battery cover assembly according to claim 12, characterized in that: The battery comprises a first insulating portion (310), wherein the first insulating portion (310) is located on one side of the cover plate (100), and the cover plate (100) and the battery tab (400) are insulated from each other via the first insulating portion (310).

14. The battery cover assembly according to claim 13, characterized in that: A first opening (311) is provided on the first insulating portion (310), and the first opening (311) is arranged opposite to the through opening (110) on the cover plate (100).

15. The battery cover assembly according to claim 14, characterized in that: It comprises a second insulating portion (320), the second insulating portion (320) being located on the other side of the cover plate (100), and the cover plate (100) and the pole (200) being insulated from each other via the second insulating portion (320).

16. The battery cover assembly according to claim 15, characterized in that: The second insulating portion (320) is provided with a second opening (321), and the second opening (321) is arranged opposite to the through opening (110) on the cover plate (100).

17. The battery cover assembly according to claim 16, characterized in that: It also includes a third insulating portion (330), one end of the third insulating portion (330) is connected to the first opening (311) of the first insulating portion (310), and the other end of the third insulating portion (330) is connected to the second opening (321) of the second insulating portion (320); The outer wall of the third insulating portion (330) is in contact with the inner wall of the through-hole (110), so that the pole (200) passing through the through-hole (110) and the cover plate (100) are insulated from each other.

18. The battery cover assembly according to any one of claims 14 to 17, characterized in that: A groove (312) is provided on a surface of the first insulating portion (310) facing away from the pole (200), and the groove (312) is located at the first opening (311).

19. The battery cover assembly according to claim 18, characterized in that: Part of the side wall of the groove (312) is connected to the first side wall (211) of the recessed space (210) of the pole (200); And / or, part of the side wall of the groove (312) is also connected to the second side wall (212) of the recessed space (210).

20. The battery cover assembly according to claim 19, wherein: The bottom of the groove (312) is flush with the bottom area of ​​the recessed space (210).

21. A battery, characterized in that: include: A housing, a pole core, and a battery cover assembly according to any one of claims 12 to 20; The housing is a cavity with an opening; The pole core is located in the cavity of the shell, and a pole ear (400) is provided at at least one end of the pole core; The cover plate (100) of the battery cover plate assembly is covered on the opening of the housing, and the tab (400) is connected to the pole (200) of the battery cover plate assembly.

22. The battery according to claim 21, characterized in that The recessed space (210) of the pole (200) has at least one welding area, and the welding area is arranged at the bottom area of ​​the recessed space (210); The pole tab (400) is connected to the pole (200) via the welding area.

23. The battery according to claim 22, characterized in that At least a portion of the pole tab (400) is located in the recessed space (210), and the pole tab (400) is connected to the protruding structure (220) of the pole (200).

24. The battery according to any one of claims 22 or 23, characterized in that: The tab (400) is connected to the recessed space (210) by resistance welding.

25. A battery pack, characterized in that: include: The battery according to any one of claims 21 to 24; Or, the battery cover assembly according to any one of claims 12 to 20; Alternatively, the battery pole structure according to any one of claims 1 to 11.

26. An electrical device, characterized in that: include: An electrical device, and a battery pack as claimed in claim 25; Alternatively, the battery according to any one of claims 21 to 24, wherein the battery pack or the battery is used to provide electrical energy to the electrical device.

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