CN220400841U - Battery connection tab, battery and electricity utilization device - Google Patents

Abstract

The embodiment of the application provides a battery connection tab, a battery and an electricity utilization device, and belongs to the technical field of batteries. The battery connection tab is provided with a connection structure, the connection structure comprises a first groove and a connection hole, the first groove is formed in the first side face of the battery connection tab in the thickness direction, the connection hole is formed in the bottom of the first groove, the connection hole is used for being connected with a battery monomer pole, and the first groove is used for accommodating at least part of the pole. Through setting up connecting hole and first recess, the utmost point post can with connecting hole laser ring welding, and the connection degree of difficulty is low, and the thickness of battery connection tab can be bigger, makes the resistance of battery connection tab reduce, and the overflow ability promotes, reduces the temperature rise and promotes electrically conductive efficiency to first recess can reduce the assembly height, promotes space utilization.

Description

Battery connection tab, battery and electricity utilization device

Technical Field

The present application relates to the field of battery technology, and more particularly, to a battery connection tab, a battery, and an electrical device.

Background

The common battery is formed by combining a plurality of battery monomers in series and parallel, in the working process of the battery, the temperature of the battery is increased due to the self internal resistance, the temperature of the battery monomers is overhigh, the overcurrent capacity of the battery monomers is reduced, the higher the resistance is, the higher the heat generation is, and the energy efficiency of the battery is reduced.

Disclosure of Invention

The application provides a battery connection tab to solve the internal resistance of general battery monomer connection tab and lead to generating heat seriously, influence battery monomer's overflow ability, the low technical problem of battery efficiency.

In a first aspect, an embodiment of the present application provides a battery connection tab, the battery connection tab is equipped with connection structure, connection structure includes first recess and connecting hole, first recess is located the battery connection tab is at the first side of thickness direction, the connecting hole is located the tank bottom of first recess, the connecting hole is used for being connected with battery monomer utmost point post, first recess is used for holding at least part of utmost point post.

In the above technical scheme, through setting up connecting hole and first recess, the utmost point post can with connecting hole laser ring welding, and the connection degree of difficulty is low, and the thickness of battery connection tab can be bigger, makes the resistance of battery connection tab reduce, and the overflow ability promotes, reduces the temperature rise and promotes conductive efficiency to first recess can reduce assembly height, promotes space utilization.

In some embodiments, the first recess is frustoconical and the upper base is a recess bottom.

In the technical scheme, the first groove is arranged in the shape of the circular truncated cone, so that the first groove and the pole are convenient to assemble, and interference during assembly is reduced.

In some embodiments, the thickness W of the battery connection tab and the depth W1 of the first recess satisfy:

2mm≤W1≤20mm，10%≤W1/W≤60%。

in the above technical scheme, the thickness W of the battery connection tab is limited by the depth W1 of the first groove, so that the first groove can not make the thickness of the battery connection tab at the position of the first groove too thin while accommodating the pole, and the structural strength is ensured.

In some embodiments, the connection structure further comprises:

the second groove is formed in the second side face of the battery connecting tab in the thickness direction, and two ends of the connecting hole are connected with the bottoms of the first groove and the second groove respectively.

In the above technical scheme, through setting up the second recess, when connecting the tab welding to utmost point post and battery, the welding seal that produces can not bulge the battery and connect the surface of tab, promotes surface evenness and space utilization.

In some embodiments, the depth W2 of the second groove satisfies:

1mm≤W2≤4mm。

in the above technical solution, the protruding portion of the solder mark is controlled in the second groove by defining the depth of the second groove.

In some embodiments, the diameter D1 of the second groove and the diameter D2 of the connection hole satisfy:

2mm≤D1-D2。

in the technical scheme, the welding operation is facilitated by limiting the dimensional relationship between the diameter of the second groove and the diameter of the connecting hole, and the welding range is controlled within the groove bottom range of the second groove.

In some embodiments, the thickness W of the battery connection tab satisfies:

20mm≤W≤50mm。

in the technical scheme, the thickness of the battery connection tab is limited, so that the resistance of the battery connection tab is reduced, the heating value during working is reduced, and the overcurrent capacity is improved.

In a second aspect, embodiments of the present application provide a battery, including:

the battery comprises a plurality of battery cells, wherein the battery cells are arranged side by side, and each battery cell is provided with two polar posts with opposite electric polarities;

the battery connection tab according to any one of the embodiments, wherein the battery connection tab is provided with at least two connection structures, and the at least two connection structures are respectively connected with one of the poles of the at least two battery cells.

In the above technical scheme, connect the battery monomer through the battery and connect the tab, the thickness that the battery connects the tab can be bigger, makes the battery connect the resistance of tab reduce, and overcurrent capacity promotes, reduces the temperature rise and promotes electrically conductive efficiency to first recess can reduce the assembly height, promotes the energy efficiency of battery and the inside space utilization of battery.

In some embodiments, the battery cell has a cover plate, the post is disposed on the cover plate, and an outer diameter of the first groove is not smaller than a diameter of a portion of the post protruding from the cover plate.

In the technical scheme, the outer diameter of the first groove is not smaller than the diameter of the protruding cover plate part of the pole, and the pole can directly penetrate into the first groove during assembly, so that the assembly is convenient.

In some embodiments, the pole comprises:

the pole body is connected with the cover plate;

the connecting column is connected with the pole body, and the connecting hole is sleeved outside the connecting column.

In the technical scheme, the connection of the terminal post and the battery connection tab is facilitated by the arrangement of the connection post.

In some embodiments, a round table extending along the circumferential direction of the round table is arranged at one end, connected with the pole body, of the connecting pole, and one side, away from the pole body, of the round table is abutted with the bottom of the first groove.

In the technical scheme, the round table is arranged to enable the battery connecting tabs to be arranged at intervals with the pole body, so that the influence of welding on the pole body is reduced.

In some embodiments, the connecting post is made of metal, and the insulating layer is sleeved outside the post body.

In a third aspect, an embodiment of the present application provides an electrical device, including a battery according to any one of the embodiments above, where the battery is configured to supply power to the electrical device.

In the above technical scheme, through set up battery connection tab in the battery to set up connecting hole and first recess on battery connection tab, supplementary energy efficiency and the inside space utilization of promoting the battery, supplementary duration that improves the power consumption device promotes the reliability in use.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered limiting the scope, and that other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic illustration of a vehicle according to some embodiments of the present application;

FIG. 2 is an exploded view of a battery according to some embodiments of the present application;

FIG. 3 is a schematic view of a partial structure of a battery according to some embodiments of the present application;

FIG. 4 is an exploded view of a partial structure of a battery provided in some embodiments of the present application;

FIG. 5 is an enlarged view of FIG. 4 at A;

FIG. 6 is a schematic diagram of a second partial structure of a battery according to some embodiments of the present disclosure;

FIG. 7 is a schematic cross-sectional view taken at B-B of FIG. 6;

fig. 8 is a schematic structural diagram of a battery connection tab according to some embodiments of the present disclosure;

fig. 9 is a second schematic structural view of a battery connection tab according to some embodiments of the present disclosure.

Reference numerals:

vehicle 1, battery 10, motor 20, controller 30;

a case 11, a first case body 111, and a second case body 112;

battery cell 12, cover plate 121, pole 122, pole body 1221, connecting pole 1222, round table 1223;

the battery connecting tab 13, the first groove 131, the connecting hole 132, the second groove 133, the first side 134, and the second side 135.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description and claims of the present application and in the description of the figures above are intended to cover non-exclusive inclusions. The terms first, second and the like in the description and in the claims or in the above-described figures, are used for distinguishing between different objects and not necessarily for describing a particular sequential or chronological order.

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly understand that the embodiments described herein may be combined with other embodiments.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "attached" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

The term "and/or" in this application is merely an association relation describing an associated object, and indicates that three relations may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In this application, the character "/" generally indicates that the associated object is an or relationship.

The term "plurality" as used herein refers to two or more (including two), and similarly, "plural sets" refers to two or more (including two), and "plural sheets" refers to two or more (including two).

The battery cells mentioned in the embodiments of the present application may include a lithium ion secondary battery, a lithium ion primary battery, a lithium sulfur battery, a sodium lithium ion battery, a sodium ion battery, a magnesium ion battery, or the like, to which the embodiments of the present application are not limited. The battery cells may be cylindrical, flat, rectangular, or otherwise shaped, as well as the embodiments herein are not limited in this regard. The battery cells are generally classified into three types according to the packaging method: the cylindrical battery cell, the square battery cell and the soft pack battery cell are not limited thereto.

Reference to a battery in embodiments of the present application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery referred to in the present application may include a battery module or a battery pack, or the like. The battery generally includes a case for housing one or more battery cells or a plurality of battery modules. The case body can prevent liquid or other foreign matters from affecting the charge or discharge of the battery cells.

The battery cell includes a case, an electrode assembly, and an electrolyte, and the case is used to accommodate the electrode assembly and the electrolyte. The electrode assembly consists of a positive electrode plate, a negative electrode plate and a separation film. The battery cell mainly relies on metal ions to move between the positive pole piece and the negative pole piece to work. The positive electrode plate comprises a positive electrode current collector and a positive electrode active material layer, wherein the positive electrode active material layer is coated on the surface of the positive electrode current collector, the positive electrode current collector without the positive electrode active material layer protrudes out of the positive electrode current collector coated with the positive electrode active material layer, and the positive electrode current collector without the positive electrode active material layer is used as a positive electrode lug. Taking a lithium ion battery as an example, the material of the positive electrode current collector may be aluminum, and the positive electrode active material may be lithium cobaltate, lithium iron phosphate, ternary lithium, lithium manganate or the like. The negative electrode plate comprises a negative electrode current collector and a negative electrode active material layer, wherein the negative electrode active material layer is coated on the surface of the negative electrode current collector, the negative electrode current collector without the negative electrode active material layer protrudes out of the negative electrode current collector coated with the negative electrode active material layer, and the negative electrode current collector without the negative electrode active material layer is used as a negative electrode tab. The material of the negative electrode current collector may be copper, and the negative electrode active material may be carbon, silicon, or the like. In order to ensure that the high current is passed without fusing, the number of positive electrode lugs is multiple and stacked together, and the number of negative electrode lugs is multiple and stacked together.

The material of the separator may be PP (polypropylene) or PE (polyethylene). In addition, the electrode assembly may be a wound structure or a lamination structure, and the embodiment of the present application is not limited thereto.

In recent years, new energy automobiles have been developed dramatically, and in the field of electric automobiles, batteries play an important role as a power source of the electric automobiles. The battery is composed of a box body and a plurality of battery monomers accommodated in the box body. The battery is used as a core part of a new energy automobile, and has high requirements on safety and cycle service life.

In a general battery, the battery is formed by combining a plurality of battery monomers in series-parallel connection, in the working process of the battery, the temperature of a battery monomer is excessively high due to the fact that the temperature of a battery monomer is increased due to the fact that the internal resistance of the battery is increased, the overcurrent capacity of the battery monomer is reduced, the higher the resistance is, the higher the heat generation is, and the energy efficiency of the battery is reduced.

Based on above-mentioned consideration, in order to solve and be used for connecting the tab for the battery because the internal resistance generates heat, lead to the internal resistance to rise further, reduce the technical problem of battery efficiency, this application has designed a battery and has connected the tab, battery connection tab is equipped with connection structure, connection structure includes first recess and connecting hole, the first side of battery connection tab in the thickness direction is located to first recess, the tank bottom of first recess is located to the connecting hole, the connecting hole is used for being connected with battery monomer utmost point post, first recess is used for holding the at least part of utmost point post.

In the battery connection tab of this kind of structure, through setting up connecting hole and first recess, the utmost point post can with connecting hole laser ring welding, and the connection degree of difficulty is low, and the thickness of battery connection tab can be bigger, makes the resistance of battery connection tab reduce, and overcurrent capacity promotes, reduces the temperature rise and promotes conductive efficiency to first recess can reduce assembly height, reduces the influence of the great battery connection tab of thickness to the space, promotes space utilization.

The battery disclosed by the embodiment of the application can be used in electric devices such as vehicles, ships or aircrafts, but is not limited to the batteries. The power supply system with the battery thermal management system, the battery and the like disclosed by the application can be used for forming the power utilization device, so that the application range of the battery thermal management system is favorably improved, and the assembly difficulty of the battery thermal management system is reduced.

The embodiment of the application provides an electricity utilization device using a battery as a power supply, wherein the electricity utilization device can be, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft and the like. Among them, the electric toy may include fixed or mobile electric toys, such as game machines, electric car toys, electric ship toys, electric plane toys, and the like, and the spacecraft may include planes, rockets, space planes, and spacecraft, and the like.

For convenience of description, the following embodiment will take an electric device according to an embodiment of the present application as an example of the vehicle 1.

As shown in fig. 1, a schematic structural diagram of a vehicle 1 according to an embodiment of the present application is shown, where the vehicle 1 may be a fuel-oil vehicle, a gas-fired vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended range vehicle. The motor 20, the controller 30 and the battery 10 may be provided inside the vehicle 1, and the controller 30 is configured to control the battery 10 to supply power to the motor 20. For example, the battery 10 may be provided at the bottom or the head or the tail of the vehicle 1. The battery 10 may be used for power supply of the vehicle 1, e.g. the battery 10 may be used as an operating power source for the vehicle 1, for electrical circuitry of the vehicle 1, e.g. for start-up, navigation and operational power requirements of the vehicle 1. In another embodiment of the present application, the battery 10 may not only serve as an operating power source for the vehicle 1, but also as a driving power source for the vehicle 1, instead of or in part instead of fuel oil or natural gas, to provide driving power for the vehicle 1.

To meet different power requirements, the battery 10 may include a plurality of battery cells 12, where the plurality of battery cells 12 may be connected in series or parallel or a series-parallel connection, where a series-parallel connection refers to a mixture of series and parallel connections.

As shown in fig. 2, a structural exploded view of the battery 10 according to one embodiment of the present application is shown. The battery 10 includes a case 11 and a plurality of battery cells 12, and the battery cells 12 are accommodated in the case 11. The case 11 is used to provide an assembly space for the battery cells 12, and the case 11 may have various structures. In some embodiments, the case 11 may include a first case body 111 and a second case body 112, the first case body 111 and the second case body 112 being overlapped with each other, the first case body 111 and the second case body 112 together defining an assembly space for accommodating the battery cell 12. The second case body 112 may have a hollow structure with one end opened, the first case body 111 may have a plate-shaped structure, and the first case body 111 covers the open side of the second case body 112, so that the first case body 111 and the second case body 112 together define an assembly space; the first case body 111 and the second case body 112 may be hollow structures each having one side opened, and the open side of the first case body 111 may be closed to the open side of the second case body 112. Of course, the case 11 formed by the first case body 111 and the second case body 112 may be various shapes, such as a cylinder, a rectangular parallelepiped, and the like.

In the battery 10, the plurality of battery cells 12 may be connected in series or parallel or a series-parallel connection, wherein a series-parallel connection refers to that the plurality of battery cells 12 are connected in series or parallel. The plurality of battery cells 12 can be directly connected in series or in parallel or in series-parallel, and then the whole formed by the plurality of battery cells 12 is placed in the box 11; of course, the battery 10 may also be a battery module form formed by connecting a plurality of battery cells 12 in series or parallel or series-parallel connection, and then connecting a plurality of battery modules in series or parallel or series-parallel connection to form a whole, and placing the whole in the case 11. The battery 10 may also include other structures, for example, the battery 10 may also include a bus bar member for making electrical connection between the plurality of battery cells 12.

Wherein each battery cell 12 may be a secondary battery or a primary battery; but not limited to, lithium sulfur batteries, sodium ion batteries, or magnesium ion batteries. The battery cells 12 may be cylindrical, flat, rectangular, or otherwise shaped. Illustratively, in fig. 3, the battery cell 12 is in the shape of a cuboid, and the cover plate of the battery cell 12 is provided in the shape of a cuboid.

In the following embodiment, the bus member is taken as a battery connection tab as an example, and the plurality of battery cells are electrically connected through the battery connection tab.

According to some embodiments of the present application, referring to fig. 3 to 6, the battery cell 12 in fig. 3, 4 and 6 only embodies the cover plate 121, and the housing of the battery cell 12 and the battery cell are omitted. The present application provides a battery 10 comprising a plurality of battery cells 12 and a battery connection tab 13.

In the present embodiment, a plurality of battery cells 12 may be arranged side by side, and each battery cell 12 has two poles 122 having opposite electric polarities. Through setting up a plurality of battery monomer 12 side by side to the electricity connection between a plurality of battery monomer 12, and the mode of arranging neatly can improve the density of arranging of a plurality of battery monomer 12 in the battery 10, promotes the energy density of battery 10.

Each of the battery cells 12 has two electrodes with opposite electric polarities, and it is understood that the two electrodes are an anode and a cathode, respectively, where the arrangement directions of the electrodes of the plurality of battery cells 12 may be arranged according to actual requirements, and the arrangement directions of the electrodes of the adjacent two battery cells 12 may be the same or different. Referring to fig. 3, when the electrode arrangement directions of the adjacent two battery cells 12 are different, it is convenient for the positive electrode of one of the adjacent two battery cells 12 to be connected with the negative electrode of the other, and the series connection of the adjacent two battery cells 12 is achieved. Referring to fig. 6, when the electrode arrangement directions of the adjacent two battery cells 12 are the same, it is convenient that the positive electrode of one of the adjacent two battery cells 12 is connected with the positive electrode of the other, or the negative electrode of one is connected with the negative electrode of the other, so that the parallel connection of the adjacent two battery cells 12 is realized.

In this embodiment, the battery connection tab 13 may be provided with at least two connection structures, and the at least two connection structures may be connected to one of the poles 122 of the at least two battery cells 12, respectively.

The battery connection tab 13 may be made of a metal material, and specifically may be made of a material having good conductivity such as copper or aluminum. The battery connection tab 13 may include at least two connection structures, and the connection structures may be used to achieve a fixed connection with the electrodes of the battery cells 12, thereby achieving an electrical connection between the two battery cells 12. It should be noted that the battery connecting tab 13 may include two or more connecting structures, for example, three, four, ten, etc., so that one battery connecting tab 13 may connect two or more battery cells 12, and the specific number is determined according to the design requirement, which is not limited herein.

Referring to fig. 3 to 9, taking the example that the battery connection tab 13 is provided with two connection structures, the two connection structures may be respectively connected to one of the poles 122 of the two battery cells 12, specifically, the two connection structures may be respectively connected to the positive pole 122 of one battery cell 12 and the negative pole 122 of the other battery cell 12; alternatively, the two connection structures may be connected to the positive electrode post 122 of one battery cell 12 and the positive electrode post 122 of the other battery cell 12, respectively; alternatively, the two connection structures may be connected to the negative electrode post 122 of one battery cell 12 and the negative electrode post 122 of the other battery cell 12, respectively.

According to some embodiments of the present application, as shown in fig. 8, the present application also proposes a battery connection tab 13.

The battery connection tab 13 may be provided with a connection structure, the connection structure may include a first groove 131 and a connection hole 132, the first groove 131 may be provided on a first side 134 of the battery connection tab 13 in a thickness direction, the connection hole 132 may be provided on a bottom of the first groove 131, the connection hole 132 may be used to connect with the post 122 of the battery cell 12, and the first groove 131 may be used to accommodate at least a portion of the post 122.

The connection structure is used for connection with the post 122 of the battery cell 12, wherein the first side 134 of the battery connection tab 13 may be a side facing the battery cell 12, the connection hole 132 may be provided through the bottom of the first groove 131 to the second side 135 opposite to the first side 134, and preferably, the axis of the connection hole 132 may be centrally provided at the bottom of the first groove 131. In other examples, the axis of the connection hole 132 may be offset at the bottom of the first groove 131 to meet the requirement that it can be connected with the differently shaped pole 122.

In actual implementation, when the battery connection tab 13 is connected with the battery monomer 12, the pole 122 can penetrate through the connecting hole 132, the battery connection tab 13 and the pole 122 are welded and fixed in a laser ring welding mode, the required energy in the welding mode is lower than that of the laser traditional welding, the welding difficulty and the welding cost are reduced, the thickness of the battery connection tab 13 can be designed to be thicker, the resistance and the heating value of the battery connection tab 13 are reduced, and the overcurrent capacity is improved. And, when placing battery connection tab 13 on battery cell 12, the at least part of post 122 except for the part that stretches into connecting hole 132 can stretch into in first recess 131 to make the assembly height of battery connection tab 13 reduce, reduce because the increase of battery connection tab 13 thickness is to whole assembly height's influence, promote space utilization.

According to the battery connection tab 13 provided by the embodiment of the application, through setting up connecting hole 132 and first recess 131, the thickness of battery connection tab 13 can be bigger, makes the resistance of battery connection tab 13 reduce, and the overflow ability promotes, reduces the temperature rise and promotes conductive efficiency to first recess 131 can reduce the assembly height, promotes space utilization.

According to the battery 10 provided by the application, the battery monomer 12 is connected through using the battery connection tab 13, the thickness of the battery connection tab 13 can be larger, the resistance of the battery connection tab 13 is reduced, the overcurrent capacity is improved, the temperature rise is reduced, the electric conduction efficiency is improved, the assembly height can be reduced by the first groove 131, and the energy efficiency of the battery 10 and the space utilization rate of the inside of the battery 10 are improved in an auxiliary mode.

According to some embodiments of the present application, referring to fig. 7, the thickness W of the battery connection tab 13 satisfies: w is more than or equal to 20mm and less than or equal to 50mm.

In the present embodiment, the thickness of the battery connection tab 13 is limited so that the internal resistance of the battery connection tab 13 is in a low range, thereby reducing the amount of heat generated when current flows. The thickness W of the battery connection tab 13 may be in the range of [20mm,50mm ], specifically, the thickness W of the battery connection tab 13 may be 20mm, 25mm, 30mm, 35mm, 40mm, 45mm, 50mm, or other values between 20mm and 50mm, which are not limited herein.

According to some embodiments of the present application, referring to fig. 7, the battery cell 12 may have a cap plate 121, the post 122 may be disposed on the cap plate 121, and the outer diameter of the first groove 131 may be not less than the diameter of the portion of the post 122 protruding from the cap plate 121.

In this embodiment, the battery cell 12 may have a cover 121, the post 122 is disposed on the cover 121, and the post 122 is relatively insulated from the cover 121. Wherein, for the connection of the pole 122, the outer surface of the protruding cover 121 of the pole 122 is provided, and the outer diameter of the first groove 131 may be not smaller than the diameter of the protruding cover 121 of the pole 122, so that when the pole 122 is connected with the battery connection tab 13, interference generated by the edge of the pole 122 and the first groove 131 at the first side 134 is reduced, assembly is facilitated, and assembly efficiency is improved.

It should be noted that at least a portion of the pole 122 protruding from the cover plate 121 may be provided in a truncated cone shape, and a bottom of the truncated cone shape is connected to the cover plate 121, wherein an outer diameter of the first groove 131 is not smaller than a diameter of the bottom of the truncated cone shape, so that the first groove 131 may accommodate a portion of the pole 122 protruding from the cover plate 121.

According to the embodiment of the application, the outer diameter of the first groove 131 is not smaller than the diameter of the part, protruding out of the cover plate 121, of the pole 122, so that the battery connection tabs 13 are connected with the pole 122, and the assembly efficiency is improved.

According to some embodiments of the present application, referring to fig. 5 and 7, the pole 122 may include a pole body 1221 and a connection pole 1222, the pole body 1221 may be connected with the cap plate 121; the connection pole 1222 may be connected to the pole body 1221, and the connection hole 132 may be sleeved outside the connection pole 1222.

In this embodiment, the pole 122 may include a pole body 1221 and a connection pole 1222, where the pole body 1221 may be connected with the cover 121 and partially protrudes out of the outer surface of the cover 121, and the connection pole 1222 is connected to an end of the pole body 1221 facing away from the cover 121 and electrically connected to the pole body 1221.

In practical implementation, when the battery connection tab 13 is connected to the pole 122, the connection hole 132 may be sleeved outside the connection post 1222 and welded to the connection post 1222, and the first groove 131 may receive at least a portion of the pole body 1221 protruding from the cover plate 121, so as to reduce the overall assembly height. Wherein, the connecting hole 132 and the connecting post 1222 may be clearance fit, so as to facilitate laser ring welding and improve the connection strength.

According to some embodiments of the present application, the connection post 1222 may be made of metal, and the post body 1221 is sleeved with an insulating layer.

In this embodiment, the connection column 1222 may be made of a metal material with conductive properties, such as copper, aluminum, etc., so as to facilitate input and output of current, and facilitate welding of the connection column 1222 and the battery connection tab 13, wherein, to reduce welding difficulty and improve welding strength, the connection column 1222 may be made of the same material as the battery connection tab 13.

The pole body 1221 is sleeved with an insulating layer, so that the pole body 1221 is relatively insulated from the cover plate 121, and the pole body 1221 is also relatively insulated from the outside, thereby improving the safety performance.

According to some embodiments of the present application, referring to fig. 5 and 7, an end of the connection post 1222 connected with the pole body 1221 may be provided with a circular truncated cone 1223 extending along a circumferential direction thereof, and a side of the circular truncated cone 1223 facing away from the pole body 1221 may abut a groove bottom of the first groove 131.

In this embodiment, one end of the connection post 1222 connected with the pole body 1221 may be provided with a circular truncated cone 1223 extending along the circumferential direction thereof, the circular truncated cone 1223 may be integrally provided with the connection post 1222, one side of the circular truncated cone 1223 facing the pole body 1221 is connected with the pole body 1221, and after the connection post 1222 extends into the connection hole 132, one side of the circular truncated cone 1223 facing away from the pole body 1221 may abut against the bottom of the first groove 131, so that the battery connection tab 13 is spaced apart from the pole body 1221.

During welding, welding laser can be blocked by the round table 1223, so that the battery connecting tab 13 is fixedly connected with the connecting column 1222 and the round table 1223, and the welding strength is higher. In addition, the round table 1223 can reduce the high temperature generated during the laser welding, and protect the insulating layer outside the pole body 1221.

According to some embodiments of the present application, referring to fig. 7, the first groove 131 may have a truncated cone shape, and the upper bottom may be a groove bottom.

In this embodiment, for facilitating the assembly of the battery connecting tab 13 and the pole 122, the first groove 131 may be in a truncated cone shape, and the upper bottom is a groove bottom, so that the opening size of the first groove 131 is larger, interference is not easy to occur in the process that the pole body 1221 enters the first groove 131, and the assembly difficulty is reduced.

According to some embodiments of the present application, referring to fig. 7, the thickness W of the battery connection tab 13 and the depth W1 of the first groove 131 may satisfy: w1 is less than or equal to 2mm and less than or equal to 20mm, W1/W is more than or equal to 10% and less than or equal to 60%.

In the present embodiment, the depth W1 of the first groove 131 may satisfy 2 mm+.w1+.20mm, so that the depth of the first groove 131 may effectively reduce the influence of the thickness of the battery connection tab 13 on the assembly space. Moreover, the thickness W of the battery connection tab 13 and the depth W1 of the first groove 131 may satisfy 10% or more and 60% or less of W1/W or less, so that the depth of the first groove 131 is not excessively large with respect to the battery connection tab 13, and the influence on the overall structural strength and the conductive efficiency is small.

The depth W1 of the first groove 131 may be [2mm,20mm ], specifically, the depth of the first groove 131 may be 2mm, 6mm, 10mm, 12mm, 14mm, 18mm, 20mm, or other dimensions between 2mm and 20mm, which is not limited herein.

The ratio W1/W of the depth W1 of the first groove 131 to the thickness W of the battery connection tab 13 ranges from [10%,60% ], specifically, W1/W may be 10%, 20%, 30%, 40%, 50%, 60%, or other values between 10% and 60%, which are not limited herein.

According to some embodiments of the present application, referring to fig. 4, 6, 7 and 9, the connection structure may further include a second groove 133, and the second groove 133 may be provided at the second side 135 of the battery connection tab 13 in the thickness direction, and both ends of the connection hole 132 are connected with the bottoms of the first groove 131 and the second groove 133, respectively.

In the present embodiment, the second side 135 of the battery connection tab 13 in the thickness direction may be further provided with a second groove 133, and one end of the connection hole 132 is connected with the groove bottom of the first groove 131, the other end of the connection hole 132 is connected with the groove bottom of the second groove 133, and after the connection post 1222 is inserted into the connection hole 132, one end of the connection post 1222 remote from the post body 1221 may extend at least to the groove bottom of the second groove 133, preferably, one end of the connection post 1222 remote from the post body 1221 may be aligned with the groove bottom of the second groove 133.

In the actual assembly process, the welding fixture performs welding operation on the second side face 135 of the battery connecting tab 13, and by arranging the second groove 133, the welding mark generated in the welding process is located at the bottom of the second groove 133 and cannot protrude out of the second side face 135 of the battery connecting tab 13, so that the assembly flatness is improved, and the space utilization rate of the inside of the battery 10 is improved.

According to some embodiments of the present application, referring to fig. 7, the depth W2 of the second groove 133 may satisfy: w2 is more than or equal to 1mm and less than or equal to 4mm.

In the present embodiment, by defining the depth of the second groove 133 so that the generated solder marks do not protrude outside the second groove 133, and the depth of the second groove 133 is not too deep, the influence on the overall structural strength and the overall space utilization is reduced. The depth W2 of the second groove 133 may be in the range of 1mm,4mm, specifically, W2 may be 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 4mm, or other dimensions between 1mm and 4mm, which is not limited herein.

According to some embodiments of the present application, referring to fig. 7, the diameter D1 of the second groove 133 and the diameter D2 of the connection hole 132 satisfy: D1-D2 is less than or equal to 2 mm.

In the present embodiment, the diameter of the second groove 133 is larger than that of the connection hole 132 to facilitate the performance of the welding operation. The welding operation is facilitated by defining a difference between the diameter D1 of the second groove 133 and the diameter D2 of the connection hole 132 to provide a sufficient operation space for the welding operation.

Wherein the difference D1-D2 between the diameter D1 of the second groove 133 and the diameter D2 of the connection hole 132 satisfies 2 mm.ltoreq.D1-D2, specifically, D1-D2 may be 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm or other dimensions not less than 2mm, it is understood that the diameter D1 of the second groove 133 does not exceed the width of the battery connection tab 13 at maximum.

According to some embodiments of the present application, there is also provided an electrical device comprising the battery 10 of any of the above aspects, and the battery 10 is used to provide electrical energy to the electrical device.

The powered device may be any of the devices or systems described above that employ the battery 10.

According to the power utilization device provided by the embodiment of the application, the battery is arranged in the battery 10 to be connected with the tab 13, the connecting hole 132 and the first groove 131 are formed in the battery to be connected with the tab 13, the energy efficiency and the internal space utilization rate of the battery 10 are improved in an auxiliary mode, the cruising ability of the power utilization device is improved in an auxiliary mode, and the use reliability is improved.

According to some embodiments of the present application, referring to fig. 7 to 9, there is provided a battery connection tab 13, a thickness W of the battery connection tab 13 satisfying 20 mm+.w+.50 mm, the battery connection tab 13 having a first side 134 and a second side 135 in a thickness direction thereof.

The battery connection tab 13 is provided with at least two connection structures, each connection structure comprises a first groove 131, a second groove 133 and a connection hole 132, the first groove 131 is arranged on a first side 134 of the battery connection tab 13, the second groove 133 is arranged on a second side 135 of the battery connection tab 13, the first groove 131 and the second groove 133 are oppositely arranged, and two ends of the connection hole 132 are respectively connected with bottoms of the first groove 131 and the second groove 133. Wherein the depth W2 of the second groove 133 satisfies 1 mm.ltoreq.W2.ltoreq.4mm, and the diameter D1 of the second groove 133 and the diameter D2 of the connection hole 132 satisfy 2 mm.ltoreq.D1-D2.

It should be noted that, without conflict, the embodiments and features of the embodiments in the present application may be combined with each other.

The foregoing is merely a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and variations may be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims (13)

1. The battery connection tab is characterized in that the battery connection tab is provided with a connection structure, the connection structure comprises a first groove and a connection hole, the first groove is formed in the first side face of the battery connection tab in the thickness direction, the connection hole is formed in the groove bottom of the first groove, the connection hole is used for being connected with a battery monomer pole, and the first groove is used for accommodating at least part of the pole.

2. The battery connection tab of claim 1, wherein the first recess is frustoconical and the upper base is a groove bottom.

3. The battery connection tab of claim 2, wherein the thickness W of the battery connection tab and the depth W1 of the first recess satisfy:

2mm≤W1≤20mm，10%≤W1/W≤60%。

4. the battery connection tab of claim 1, wherein the connection structure further comprises:

the second groove is formed in the second side face of the battery connecting tab in the thickness direction, and two ends of the connecting hole are connected with the bottoms of the first groove and the second groove respectively.

5. The battery connection tab of claim 4, wherein the depth W2 of the second recess satisfies:

1mm≤W2≤4mm。

6. the battery connection tab of claim 4, wherein the diameter D1 of the second groove and the diameter D2 of the connection hole satisfy:

2mm≤D1-D2。

7. the battery connection tab of any one of claims 1-6, wherein the thickness W of the battery connection tab satisfies:

20mm≤W≤50mm。

8. a battery, comprising:

the battery comprises a plurality of battery cells, wherein the battery cells are arranged side by side, and each battery cell is provided with two polar posts with opposite electric polarities;

the battery connection tab of any one of claims 1-7, provided with at least two of the connection structures, each connected to one of the poles of at least two of the battery cells.

9. The battery of claim 8, wherein the battery cell has a cover plate, the post is disposed on the cover plate, and an outer diameter of the first groove is not smaller than a diameter of a portion of the post protruding from the cover plate.

10. The battery of claim 9, wherein the post comprises:

the pole body is connected with the cover plate;

the connecting column is connected with the pole body, and the connecting hole is sleeved outside the connecting column.

11. The battery of claim 10, wherein the connecting post is made of metal, and the post body is sleeved with an insulating layer.

12. The battery of claim 11, wherein a truncated cone extending along the circumferential direction of the end of the connecting post connected with the post body is arranged at the end, and one side of the truncated cone, which is away from the post body, is abutted with the bottom of the first groove.

13. An electrical device comprising a battery as claimed in any one of claims 8 to 12 for powering the electrical device.