Full-tab battery and electric equipment

Abstract

The utility model provides a full-tab battery and electric equipment, and relates to the technical field of batteries. The full-tab battery comprises a shell, an electrode cover plate and a full-tab roll core, wherein one of two opposite ends of the shell is an open end; the electrode cover plate is arranged at the opening end; the full-tab roll core is located in the shell, and the full-tab roll core is provided with a positive tab and a negative tab which are oppositely arranged; wherein one of the positive pole lug and the negative pole lug is fixedly welded with the electrode cover plate, and the other one of the positive pole lug and the negative pole lug is fixedly welded with the shell. The full-tab battery provided by the utility model is designed without a collector plate, the negative tab is directly welded by the shell, and the positive tab is welded by the electrode cover plate, so that the full-tab battery has the advantages of low internal resistance, high reliability, simple assembly structure and reduction of internal components of the battery; moreover, the battery weight can be reduced, and the battery energy density is improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a full-tab battery and electrical equipment. Background Art

[0002] Generally, lithium-ion and sodium-ion batteries are categorized by tab type as either single-tab or full-tab batteries. Full-tab batteries can be categorized as either single-tab or vertical full-tab batteries. Vertical full-tab batteries offer advantages such as low internal resistance and high safety. The positive current is conducted through the cover, while the negative current is conducted through the steel shell, resulting in a simple structure. However, vertical full-tab batteries have numerous internal components, requiring numerous assembly steps. Furthermore, the weight and volume of the components themselves hinder the improvement of battery energy density. Utility Model Content

[0003] In view of this, the purpose of this application is to overcome the shortcomings of the existing technology and provide a full-tab battery and electrical equipment that can reduce battery weight, increase battery energy density, reduce the number of components, have high reliability, and simplify the assembly process.

[0004] This application provides the following technical solutions:

[0005] In a first aspect, an embodiment of the present application provides a full-tab battery, the full-tab battery comprising:

[0006] a housing, wherein one of two opposite ends of the housing is an open end;

[0007] an electrode cover plate, the electrode cover plate being arranged at the opening end;

[0008] A full-tab winding core is located in the shell, and the full-tab winding core has a positive pole tab and a negative pole tab that are relatively arranged; wherein, one of the positive pole tab and the negative pole tab is welded and fixed to the electrode cover plate, and the other of the positive pole tab and the negative pole tab is welded and fixed to the shell.

[0009] In some embodiments of the first aspect, the full-tab battery further includes a positive electrode column, the electrode cover plate and the positive electrode tab are welded and fixed, and the electrode cover plate and the positive electrode column are integrally arranged.

[0010] In some embodiments of the first aspect, the full-tab battery also includes an insulating sealing ring, the electrode cover plate has a large diameter end and a small diameter end connected in sequence, and the small diameter end and the open end are gap-fitted; the insulating sealing ring is wrapped around the edge of the large diameter end, and the insulating sealing ring is clamped between the large diameter end and the inner wall of the shell to form an insulating and sealed connection between the electrode cover plate and the shell.

[0011] In some embodiments of the first aspect, a rolling groove is provided on the outer wall of the shell, the rolling groove extends along the circumference of the shell, the inner diameter of the rolling groove is smaller than the inner diameter of the shell, and the insulating sealing ring is clamped between the large diameter end and one end of the rolling groove facing the open end.

[0012] In some embodiments of the first aspect, a first welding groove is provided on an end surface of the electrode cover plate facing away from the housing;

[0013] The shell has a bottom end, the bottom end and the open end are arranged opposite to each other, the bottom end and the negative electrode tab are welded and fixed, and a second welding groove is provided on the end surface of the bottom end away from the open end.

[0014] In some embodiments of the first aspect, the housing is cylindrical, the electrode cover is circular, and the housing and the electrode cover are coaxially arranged.

[0015] There are a plurality of first welding grooves, the plurality of first welding grooves are spaced apart along the circumference of the electrode cover plate, and the first welding grooves extend along the radial direction of the electrode cover plate;

[0016] There are multiple second welding grooves, and the multiple second welding grooves are spaced apart along the circumferential direction of the electrode cover plate. The second welding grooves extend along the radial direction of the shell.

[0017] In some embodiments of the first aspect, a liquid injection hole is provided at the bottom end of the shell, and an elastic sealing plug is clamped to the liquid injection hole.

[0018] In some embodiments of the first aspect, the bottom end has a thinned region;

[0019] The full-tab battery also includes an explosion-proof valve, which includes a portion of the bottom end located in the thinning area, the thinning area extending along the circumference of the bottom end and connected end to end, and the thinning area is used to separate the bottom end into an inner circle area and an outer circle area, the inner circle area is close to the center of the bottom end, and the outer circle area is far away from the center of the bottom end, and the wall thickness of the bottom end first decreases and then increases from the inner circle area to the outer circle area; wherein, the coverage area of the inner circle area is not less than the cross-sectional area of the full-tab core.

[0020] In some embodiments of the first aspect, a groove is opened on the outer side of the bottom end, the groove width decreases in the groove depth direction, and the portion of the bottom end where the groove is located forms the thinning area.

[0021] In a second aspect, the present application further provides an electrical device, which includes a full-tab battery as described in any one of the above embodiments.

[0022] The embodiments of the present application have the following advantages:

[0023] The present application provides a full-tab battery, which conducts current through the electrode cover plate and the shell. The positive electrode tab is welded and fixed to the electrode cover plate, and the negative electrode tab is welded and fixed to the shell. This design makes the current transmission path more direct, reduces internal resistance, and improves current transmission efficiency. In addition, by reducing the number of internal components, the overall weight of the battery is reduced. Obviously, by optimizing the internal structure, unnecessary components are reduced, and more space is provided for the battery to accommodate more active materials, thereby improving energy density. It is foreseeable that the simplified structure reduces potential failure points and improves battery reliability. The welding fixation method is more stable than the traditional connection method and reduces problems caused by poor connection. The number of internal components is reduced, making the assembly process simpler and improving production efficiency. The simplified structure also helps to reduce production costs.

[0024] The present application also relates to an electrical device. Since the above-mentioned full-tab battery has the above-mentioned technical effects, the electrical device including the full-tab battery should have the same technical effects, which will not be repeated here.

[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 A schematic structural diagram of a full-tab battery provided by an embodiment of the present application is shown from one perspective;

[0028] Figure 2 A schematic structural diagram of a full-tab battery provided by an embodiment of the present application from another perspective is shown;

[0029] Figure 3 A schematic structural diagram of a housing of a full-tab battery provided in an embodiment of the present application is shown;

[0030] Figure 4 A schematic structural diagram of an electrode cover plate of a full-tab battery provided in an embodiment of the present application is shown;

[0031] Figure 5A schematic structural diagram of an insulating sealing ring of a full-tab battery provided in an embodiment of the present application is shown;

[0032] Figure 6 A schematic structural diagram of an elastic sealing plug for a full-tab battery provided in an embodiment of the present application is shown.

[0033] Description of main component symbols:

[0034] 100-shell; 110-open end; 120-bottom end; 121-second welding groove; 122-liquid injection hole; 123-explosion-proof valve; 130-rolling groove; 200-full-electrode tab winding core; 210-positive electrode tab; 220-negative electrode tab; 300-insulating sealing ring; 310-card slot; 400-electrode cover; 410-first welding groove; 420-large diameter end; 430-small diameter end; 500-positive electrode column; 600-elastic sealing plug. DETAILED DESCRIPTION

[0035] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0036] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. Conversely, when an element is referred to as being "directly on" another element, there is no intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only.

[0037] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs. The terms used in the template description herein are for the purpose of describing specific embodiments only and are not intended to limit this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0040] Among the related technologies, the new energy industry is developing rapidly. Among them, lithium-ion batteries and sodium-ion batteries are a new type of rechargeable batteries. Due to their high energy density, small volume structure, fast discharge rate, low self-discharge rate and long cycle, they are widely used in digital products, power systems and energy storage fields.

[0041] Lithium-ion and sodium-ion batteries can be categorized by tab type as either single-tab or full-tab batteries. Full-tab batteries can be categorized as either single-tab or vertical full-tab batteries. Vertical full-tab batteries offer advantages such as low internal resistance and high safety. The positive current is conducted through the cover, while the negative current is conducted through the steel shell, resulting in a simple structure. However, vertical full-tab batteries have numerous internal components, requiring numerous assembly steps. Furthermore, the weight and volume of the components themselves hinder the improvement of battery energy density.

[0042] like Figure 1 and Figure 2 As shown, in order to solve the above technical problems, an embodiment of the present application provides a full-tab battery, which includes a shell 100, an electrode cover plate 400 and a full-tab core 200, one of the two opposite ends of the shell 100 is an open end 110; the electrode cover plate 400 is arranged at the open end 110; the full-tab core 200 is located in the shell 100, and the full-tab core 200 has a positive pole tab 210 and a negative pole tab 220 arranged oppositely; wherein, one of the positive pole tab 210 and the negative pole tab 220 is welded and fixed to the electrode cover plate 400, and the other of the positive pole tab 210 and the negative pole tab 220 is welded and fixed to the shell 100.

[0043] In these embodiments, the shell 100 is a metal shell 100 to ensure conductivity. Among them, one of the two opposite ends of the shell 100 is an open end 110, and the shell 100 is used to accommodate the full-tab core 200 and other components, that is, the full-tab core 200 is taken in and out through the open end 110. Exemplarily, the material of the shell 100 is preferably a lightweight and high-strength material, such as steel or aluminum alloy, to reduce the weight of the battery. The electrode cover plate 400 is provided at the open end 110 of the shell 100 and is used to close the open end 110. The electrode cover plate 400 is used to connect one of the positive pole tab 210 or the negative pole tab 220 to an external circuit. The electrode cover plate 400 is made of a material with good conductivity and corrosion resistance, such as stainless steel or nickel-plated copper.

[0044] The full-tab winding core 200 is located in the shell 100 and has a positive tab 210 and a negative tab 220 arranged opposite to each other. One of the positive tab 210 and the negative tab 220 is welded and fixed to the electrode cover plate 400, and the other is welded and fixed to the shell 100. For example, the positive tab 210 and the electrode cover plate 400 are welded and fixed, and the negative tab 220 and the bottom end 120 of the shell 100 are welded and fixed. Of course, in other embodiments, the negative tab 220 and the electrode cover plate 400 are welded and fixed, and the positive tab 210 and the bottom end 120 of the shell 100 are welded and fixed. To ensure good conductivity, the tabs are made of a material with good conductivity, such as copper (positive electrode) or aluminum (negative electrode).

[0045] During operation, the full-tab battery conducts current through the electrode cover plate 400 and the shell 100. The positive electrode tab 210 is welded to the electrode cover plate 400, and the negative electrode tab 220 is welded to the shell 100. This design makes the current transmission path more direct, reduces internal resistance, and improves current transmission efficiency. In addition, by reducing the number of internal components, the overall weight of the battery is reduced. Obviously, by optimizing the internal structure and reducing unnecessary components, more space is provided for the battery to accommodate more active materials, thereby improving energy density. As expected, the simplified structure reduces potential failure points and improves battery reliability. The welding fixation method is more stable than the traditional connection method and reduces problems caused by poor connection. The reduction in the number of internal components makes the assembly process simpler and improves production efficiency. The simplified structure also helps to reduce production costs.

[0046] like Figure 4 As shown, in some embodiments, the full-tab battery further includes a positive electrode column 500, the electrode cover plate 400 and the positive electrode tab 210 are welded and fixed, and the electrode cover plate and the positive electrode column 500 are integrally arranged.

[0047] In these embodiments, the electrode cover plate 400 is welded and fixed to the positive electrode tab 210 to ensure good electrical connection. Among them, the positive electrode post 500 is integrally arranged with the electrode cover plate 400, that is, the electrode cover plate 400 and the positive electrode post 500 are the same part, fixed together by integral molding or welding. The positive electrode post 500 is used to lead the current on the electrode cover plate 400 to the outside of the battery. The positive electrode post 500 is made of a material with good conductivity and mechanical strength, such as copper or nickel-plated copper. During operation, the electrode cover plate 400 and the positive electrode post 500 are integrally arranged, and the positive current is conducted to the positive electrode post 500 through the electrode cover plate 400, and then led to the outside of the battery by the positive electrode post 500. The negative electrode tab 220 is welded and fixed to the shell 100, and the negative current is led to the outside of the battery through the shell 100.

[0048] Clearly, integrating the positive electrode post 500 and the electrode cover simplifies the structure and reduces potential points of failure. Furthermore, it reduces assembly steps, improving overall mechanical strength and electrical connection reliability. This design is applicable not only to lithium-ion batteries but also to sodium-ion batteries.

[0049] like Figure 1 、 Figure 4 and Figure 5 As shown, in some embodiments, the full-tab battery also includes an insulating sealing ring 300, and the electrode cover plate 400 has a large diameter end 420 and a small diameter end 430 connected in sequence, and the small diameter end 430 is gap-fitted with the open end 110; the insulating sealing ring 300 is wrapped around the edge of the large diameter end 420, and the insulating sealing ring 300 is clamped between the large diameter end 420 and the inner wall of the shell 100, so that an insulating and sealed connection is formed between the electrode cover plate 400 and the shell 100.

[0050] In these embodiments, one of the two opposing ends of the housing 100 is an open end 110, while the other is a closed end. The housing 100 is used to accommodate the full-tab winding core 200 and other components. The open end 110 of the housing 100 is used to mount the electrode cover plate 400 and has an inner wall to cooperate with the insulating seal ring 300 to achieve an insulating seal between the electrode cover plate 400 and the housing 100.

[0051] The electrode cover plate 400 has a large-diameter end 420 and a small-diameter end 430, which are connected in sequence. The small-diameter end 430 has a clearance fit with the open end 110 of the housing 100, ensuring smooth installation of the electrode cover plate 400 and preventing the electrode cover plate 400 from contacting the conductive housing 100. The large-diameter end 420 is used to secure the insulating seal ring 300 and mates with the inner wall of the housing 100 to form a sealed connection.

[0052] The insulating sealing ring 300 is wrapped around the edge of the large diameter end 420 of the electrode cover plate 400. The insulating sealing ring 300 is clamped between the large diameter end 420 and the inner wall of the housing 100 to form an insulating and sealed connection between the electrode cover plate 400 and the housing 100. For example, the inner wall of the insulating sealing ring 300 is provided with a card groove 310, and the edge of the large diameter end 420 is snapped into the card groove 310, so that after assembly is completed, the electrode cover plate 400 contacts the housing 100 through the insulating sealing ring 300 to achieve insulation between the two. In addition, the sealing properties of the insulating sealing ring 300 can be used to seal the gap between the electrode cover plate 400 and the housing 100.

[0053] Considering the sealing performance, the insulating sealing ring 300 is made of a material with good insulating and sealing properties, such as silicone rubber or polytetrafluoroethylene (PTFE).

[0054] For example, in one specific embodiment, the housing 100 is cylindrical, with one end of the housing 100 being an open end 110 for mounting the electrode cover plate 400. The housing 100 is constructed of steel, which is lightweight and highly conductive. The other end of the housing 100 is a closed end for securing the negative electrode tab 220. The open end 110 of the housing 100 has an inner wall for mating with the insulating seal 300. The electrode cover plate 400 is circular, with a diameter slightly smaller than that of the open end 110 of the housing 100. The electrode cover plate 400 has a large-diameter end 420 and a small-diameter end 430, which are connected in sequence. The small-diameter end 430 has a clearance fit with the open end 110 of the housing 100 and extends into the housing 100, allowing the end surface of the small-diameter end 430 to be welded to the negative electrode tab 220. The large-diameter end 420 secures the insulating seal 300 and mates with the inner wall of the housing 100 to form a sealed connection. The electrode cover plate 400 is made of stainless steel, which has excellent conductivity and corrosion resistance. The full-tab winding core 200 is located within the housing 100 and has a positive electrode tab 210 and a negative electrode tab 220 positioned opposite each other. The positive electrode tab 210 is welded to the electrode cover plate 400, and the negative electrode tab 220 is welded to the housing 100.

[0055] like Figure 2 and Figure 3 As shown, in some embodiments, the outer wall of the shell 100 is provided with a rolling groove 130, which extends along the circumference of the shell 100. The inner diameter of the rolling groove 130 is smaller than the inner diameter of the shell 100, and the insulating sealing ring 300 is clamped between the large diameter end 420 and the end of the rolling groove 130 facing the open end 110.

[0056] In these embodiments, this design is mainly used to provide a better sealing effect and ensure the stability and reliability of the shell 100 under various operating conditions, and the rolling groove 130 can support structures such as the electrode cover plate 400 and the insulating sealing ring 300 to prevent sagging and damaging the winding core. Among them, the rolling groove 130 is arranged on the outer wall of the shell 100 and extends along the circumference of the shell 100. The inner diameter of the rolling groove 130 is smaller than the inner diameter of the shell 100, which makes the rolling groove 130 form an annular groove on the shell 100. The insulating sealing ring 300 is clamped between the large diameter end 420 of the rolling groove 130 and the end of the rolling groove 130 facing the open end 110. This clamping method ensures that the insulating sealing ring 300 can fit tightly against the shell 100 and will not easily fall out or shift when subjected to external pressure.

[0057] It should be noted that after installation, the insulating seal ring 300 fits tightly against the housing 100, forming an effective seal. When the housing 100 is subjected to external pressure, the insulating seal ring 300 is further compressed, thereby enhancing the sealing effect. The groove 130 prevents the insulating seal ring 300 from easily falling out, ensuring its stability even under prolonged use or high pressure.

[0058] Furthermore, based on the stability considerations of the electrode cover plate 400, after the electrode cover plate 400 with the insulating sealing ring 300 is assembled on the open end 110, the edge of the open end 110 is curled and formed into a curl, so that the edge of the open end 110 is bent inward to contact the upper end of the insulating sealing ring 300, so that the elastic sealing ring and the large diameter end 420 are clamped between the curl and the rolling groove 130, and at the same time, the shell 100 can be prevented from contacting the electrode cover plate 400.

[0059] Alternatively, a retaining ring may be welded to the open end 110 to fix the retaining ring and to cooperate with the rolling groove 130 to clamp the insulating sealing ring 300 , thereby achieving the same technical effect as above.

[0060] like Figure 4 As shown, in some embodiments, the end surface of the electrode cover plate 400 facing away from the shell 100 is provided with a first welding groove 410; the shell 100 has a bottom end 120, the bottom end 120 and the open end 110 are arranged opposite to each other, the bottom end 120 and the negative electrode tab 220 are welded and fixed, and the end surface of the bottom end 120 facing away from the open end 110 is provided with a second welding groove 121.

[0061] In these embodiments, a first welding groove 410 is provided on the end surface of the electrode cover plate 400 facing away from the housing 100. The first welding groove 410 is used to weld the electrode cover plate 400 to the positive electrode tab 210, ensuring electrical connection and mechanical fixation between the electrode cover plate 400 and the positive electrode tab 210. The first welding groove 410 is used to strengthen the weld strength between the electrode cover plate 400 and the positive electrode tab 210. The first welding groove 410 ensures the firmness of the weld.

[0062] The bottom end 120 of the housing 100 is welded to the negative electrode tab 220, ensuring electrical connection and mechanical fixation between the negative electrode tab 220 and the housing 100. The second welding groove 121 is used to strengthen the weld strength between the bottom end 120 of the housing 100 and the negative electrode tab 220. The second welding groove 121 ensures the firmness of the weld.

[0063] For example, the first welding groove 410 is opened in the electrode cover plate 400, and the thickness of the electrode cover plate 400 is reduced at the first welding groove 410. Similarly, the second welding groove 121 is opened outside the bottom end 120, and the thickness of the bottom end 120 is reduced at the second welding groove 121.

[0064] It is easy to understand that the electrode cover plate 400 is welded to the housing 100 and the negative electrode tab 220 is welded to the bottom end 120 of the housing 100 by a laser welding process. During the welding process, laser welding is performed at the first welding groove 410 and the second welding groove 121, so that the connection between the two is better, thereby improving the firmness of the welding.

[0065] For example, in this embodiment, the number of the first welding grooves 410 is set to 1. Of course, in other embodiments, the number of the first welding grooves 410 can also be set to 2, 3, 4, 5, 6, etc.

[0066] For example, in this embodiment, the number of the second welding grooves 121 is set to 1. Of course, in other embodiments, the number of the second welding grooves 121 can also be set to 2, 3, 4, 5, 6, etc.

[0067] like Figure 2 、 Figure 3 and Figure 4 As shown, in some embodiments, the housing 100 is configured to be cylindrical, the electrode cover plate 400 is configured to be circular, and the housing 100 and the electrode cover plate 400 are coaxially arranged;

[0068] There are multiple first welding grooves 410 , which are spaced apart along the circumference of the electrode cover plate 400 , and extend radially along the electrode cover plate 400 .

[0069] There are multiple second welding grooves 121 . The multiple second welding grooves 121 are spaced apart along the circumference of the electrode cover plate 400 . The second welding grooves 121 extend along the radial direction of the housing 100 .

[0070] In these embodiments, the housing 100 and the electrode cover plate 400 are coaxially arranged to ensure that the two can be aligned during assembly. There are multiple first welding grooves 410, which are arranged at intervals along the circumference of the electrode cover plate 400. The first welding grooves 410 extend along the radial direction of the electrode cover plate 400 and are used to weld the electrode cover plate 400 to the positive electrode tab 210. There are multiple second welding grooves 121, which are arranged at intervals along the circumference of the bottom end 120 of the housing 100. The second welding grooves 121 extend along the radial direction of the bottom end 120 of the housing 100 and are used to weld the bottom end 120 of the housing 100 to the negative electrode tab 220.

[0071] The plurality of first welding grooves 410 and the plurality of second welding grooves 121 are spaced apart along the circumference of the shell 100 , and the first welding grooves 410 and the second welding grooves 121 are extended along the radial direction of the shell 100 , providing uniform welding distribution and reducing resistivity.

[0072] For example, in this embodiment, the first welding groove 410 is configured as a rectangular groove. Of course, in other embodiments, the first welding groove 410 is configured as a V-shaped groove, an arc-shaped groove, etc.

[0073] For example, in this embodiment, the second welding groove 121 is configured as a rectangular groove. Of course, in other embodiments, the second welding groove 121 is configured as a V-shaped groove, an arc groove, etc.

[0074] like Figure 3 and Figure 6 As shown, in some embodiments, the bottom end 120 of the housing 100 is provided with a liquid injection hole 122 , and the liquid injection hole 122 is clamped with an elastic sealing plug 600 .

[0075] In these embodiments, the bottom end 120 of the battery shell 100 is provided with an injection hole 122, which is mainly used to inject electrolyte during the battery assembly process, and the elastic sealing plug 600 is used to ensure that it can be effectively sealed after injection to prevent electrolyte leakage while maintaining the sealing inside the battery.

[0076] The size and position of the injection hole 122 are reasonably designed to ensure that the electrolyte can be smoothly injected into the battery. For example, the injection hole 122 is located at the center of the bottom end 120 of the shell 100, thereby enabling the electrolyte to be evenly dispersed. Of course, the second welding groove 121 is formed by a recessed portion of the bottom end 120 of the shell 100, and the thickness of the recessed portion is thinned. A guide groove is formed between adjacent second welding grooves 121, thereby allowing the electrolyte injected from the injection hole 122 located at the center of the bottom end 120 of the shell 100 to flow radially along the guide groove in the shell 100, which is beneficial to the distribution of the electrolyte.

[0077] The elastic sealing plug 600 is used to seal the injection hole 122 after the electrolyte is injected. The elastic sealing plug 600 is usually made of an elastic material, such as rubber or silicone, to ensure the sealing effect. The elastic sealing plug 600 is designed to be a structure that can be snapped onto the injection hole 122 to ensure that the elastic sealing plug 600 can fit tightly into the injection hole 122. Among them, the elastic sealing plug 600 is fixed to the injection hole 122 by snapping, ensuring that it will not fall off easily during use. Exemplarily, the snap-fitting method can be through a groove on the elastic sealing plug 600 snapping into the edge of the injection hole 122, or other similar designs, which are not specifically limited here. Optionally, the elastic sealing plug 600 is set to an I-shaped structure.

[0078] It should be noted that, since the elastic sealing plug 600 can be elastically deformed, when the battery fails due to heat, the elastic sealing plug 600 can be pushed out, and the air pressure generated inside the battery can be discharged in time to achieve an explosion-proof effect.

[0079] like Figure 3 As shown, in some embodiments, the bottom end 120 has a thinning area; the full-tab battery also includes an explosion-proof valve 123, the explosion-proof valve 123 includes a portion of the bottom end 120 located in the thinning area, the thinning area extends along the circumference of the bottom end 120 and is connected end to end, the thinning area is used to separate the bottom end 120 into an inner circle area and an outer circle area, the inner circle area is close to the center of the bottom end 120, and the outer circle area is away from the center of the bottom end 120, and the wall thickness of the bottom end 120 first decreases and then increases from the inner circle area to the outer circle area; wherein, the coverage area of the inner circle area is not less than the cross-sectional area of the full-tab core 200.

[0080] In these embodiments, by providing a thinned region at the bottom end 120, the wall thickness of the bottom end 120 in the thinned region is made smaller than the wall thickness of the inner and outer regions of the bottom end 120. As a result, the portion of the bottom end 120 in the thinned region forms a breakable structure, namely, the explosion-proof valve 123. Simply put, the design of the thinned region makes the explosion-proof valve 123 more likely to rupture when the internal pressure of the battery is too high, releasing pressure and preventing battery explosion.

[0081] Furthermore, the inner ring area is no less than the cross-sectional area of the full tab core 200, ensuring that the electrolyte can fully contact the negative electrode, improving the electrochemical performance of the battery. Furthermore, the contact area between the bottom end 120 and the negative electrode of the core is increased.

[0082] When the internal pressure of the battery exceeds the set threshold, the thinner part of the wall thickness of the thinning area (i.e., the location of the explosion-proof valve 123) will rupture first. The internal pressure is released by rupture to prevent the battery from exploding. At the same time, since the coverage area of the inner ring area is not less than the cross-sectional area of the full-tab core 200, the full-tab core 200 can be separated from the shell 100 after the inner ring area is separated from the shell 100. That is, when a safety accident occurs in the battery, the full-tab core 200 inside the battery can be discharged in a directional manner.

[0083] For example, the thinned area is formed by the scribe line on the outer side of the bottom end 120. Of course, in other embodiments, the thinned area can also be formed by a groove on the bottom end 120, etc., which is not specifically limited here.

[0084] like Figure 3 As shown, in some embodiments, a groove is opened on the outer side of the bottom end 120, and the groove width decreases in the groove depth direction, and the portion of the bottom end 120 where the groove is set forms a thinning area.

[0085] In these embodiments, taking the housing 100 as a cylindrical shape, the bottom end 120 of the housing 100 is circular, and the groove extends along the circumference of the bottom end 120 and is connected end to end to form an annular groove. The groove design forms a thinned area in the bottom end 120.

[0086] In some embodiments, the present application also provides an electrical device, which includes a full-tab battery as described in any one of the above embodiments.

[0087] Since the above-mentioned full-tab battery has the above-mentioned technical effects, the electrical equipment including the full-tab battery should have the same technical effects, which will not be repeated here.

[0088] The technical solutions described in the embodiments of the present application are applicable to various battery-powered electrical devices. The electrical devices may be vehicles, mobile phones, portable devices, laptop computers, ships, spacecraft, electric toys, and electric tools, etc. Vehicles may be fuel vehicles, gas vehicles, or new energy vehicles. New energy vehicles may be pure electric vehicles, hybrid vehicles, or extended-range vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools, and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. The embodiments of the present application do not impose any special restrictions on the above-mentioned electrical devices.

[0089] For the convenience of description, the following embodiments are described by taking the electric device as a vehicle as an example.

[0090] The vehicle can be a fuel-powered vehicle, a gas-powered vehicle, or a new energy vehicle. New energy vehicles can include pure electric vehicles, hybrid vehicles, or extended-range vehicles. The vehicle's interior can be equipped with a motor, a controller, and a battery pack. The controller controls how the battery pack powers the motor. For example, the battery pack can be located at the bottom, front, or rear of the vehicle. The battery pack can be used to power the vehicle; for example, it can serve as the vehicle's operating power source and be used in the vehicle's circuit system; for example, the battery pack is used for starting, navigation, and operating the vehicle.

[0091] In all examples shown and described herein, any specific values should be interpreted as merely exemplary and not limiting, and thus other examples of the exemplary embodiments may have different values.

[0092] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0093] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present application. It should be noted that a person skilled in the art may make various modifications and improvements without departing from the scope of the present application, and such modifications and improvements are all within the scope of protection of the present application.

Claims

1. A full-tab battery, characterized in that: The full-tab battery includes: a housing, wherein one of two opposite ends of the housing is an open end; an electrode cover plate, the electrode cover plate being arranged at the opening end; A full-tab winding core is located in the shell, and the full-tab winding core has a positive pole tab and a negative pole tab that are relatively arranged; wherein, one of the positive pole tab and the negative pole tab is welded and fixed to the electrode cover plate, and the other of the positive pole tab and the negative pole tab is welded and fixed to the shell.

2. The full-tab battery according to claim 1, characterized in that: The full-tab battery also includes a positive electrode column. The electrode cover plate and the positive electrode tab are welded and fixed, and the electrode cover plate and the positive electrode column are integrally arranged.

3. The full-tab battery according to claim 1, characterized in that: The full-tab battery also includes an insulating sealing ring, the electrode cover plate has a large diameter end and a small diameter end connected in sequence, and the small diameter end and the open end are gap-fitted; the insulating sealing ring is wrapped around the edge of the large diameter end, and the insulating sealing ring is clamped between the large diameter end and the inner wall of the shell to form an insulating and sealed connection between the electrode cover plate and the shell.

4. The full-tab battery according to claim 3, characterized in that: The outer wall of the shell is provided with a rolling groove, which extends along the circumference of the shell. The inner diameter of the rolling groove is smaller than the inner diameter of the shell, and the insulating sealing ring is clamped between the large diameter end and one end of the rolling groove facing the open end.

5. The full-tab battery according to claim 4, characterized in that: The end surface of the electrode cover plate facing away from the shell is provided with a first welding groove; The shell has a bottom end, the bottom end and the open end are arranged opposite to each other, the bottom end and the negative electrode tab are welded and fixed, and a second welding groove is provided on an end surface of the bottom end away from the open end.

6. The full-tab battery according to claim 5, characterized in that: The shell is configured to be cylindrical, the electrode cover is configured to be circular, and the shell and the electrode cover are coaxially arranged; There are a plurality of first welding grooves, the plurality of first welding grooves are spaced apart along the circumference of the electrode cover plate, and the first welding grooves extend along the radial direction of the electrode cover plate; There are multiple second welding grooves, and the multiple second welding grooves are spaced apart along the circumferential direction of the electrode cover plate. The second welding grooves extend along the radial direction of the shell.

7. The full-tab battery according to claim 5, characterized in that: The bottom end of the shell is provided with a liquid injection hole, and the liquid injection hole is clamped with an elastic sealing plug.

8. The full-tab battery according to claim 5, characterized in that: The bottom end has a thinned area; The full-tab battery also includes an explosion-proof valve, which includes a portion of the bottom end located in the thinning area, the thinning area extending along the circumference of the bottom end and connected end to end, and the thinning area is used to separate the bottom end into an inner circle area and an outer circle area, the inner circle area is close to the center of the bottom end, and the outer circle area is far away from the center of the bottom end, and the wall thickness of the bottom end first decreases and then increases from the inner circle area to the outer circle area; wherein, the coverage area of the inner circle area is not less than the cross-sectional area of the full-tab core.

9. The full-tab battery according to claim 8, characterized in that: A groove is provided on the outer side of the bottom end, the width of the groove decreases in the direction of the groove depth, and the portion of the bottom end where the groove is provided forms the thinning area.

10. An electrical device, characterized in that: The electrical equipment includes the full-tab battery according to any one of claims 1 to 9.

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