Power type cylindrical lithium ion battery pole piece structure

Abstract

The utility model discloses a power type cylindrical lithium ion battery pole piece structure, which relates to the technical field of battery pole pieces, and particularly comprises an electrode piece body wound in a shell, the end part of the shell is sealed by an end cover, one side of the electrode piece body is a coating area, one end of the electrode piece body is provided with a tab, the end part of the tab is a reserved light foil, and the reserved light foil is arranged in the shell. One side of the tab is connected with an extension plate; and the extension plate is in contact with an end cover conductive disc at the bottom of the end cover. According to the utility model, the reserved light foil is arranged, so that dust caused by contact between the cutter and a pole piece material area can be effectively avoided, the winding qualification rate is effectively improved, the black leakage and spiral proportion is reduced, the use safety of the battery is improved, meanwhile, the extension plate is bent to be in contact with the positioning rod during production, and the positioning rod can penetrate through the through hole, so that the production efficiency is improved, and the production cost is reduced. And thus, the overall stability of the electrode plate is effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery pole piece technical field, concretely is a kind of power type cylindrical lithium ion battery pole piece structure. BACKGROUND

[0002] Lithium ion battery as green environmental protection new energy, with good reliability, high safety, small size, light weight and other advantages, therefore, has been widely used in digital product, electric vehicle, military product and other fields, simultaneously, the performance and safety requirement of lithium ion battery are also increasingly high.

[0003] However, the existing lithium ion battery production process needs to carry out positive and negative pole batching, coating, rolling, slitting, baking, winding, into shell, welding and other steps, and the existing electrode piece after slitting is wound, since the end of electrode piece is cut off during the process, cutter and pole piece material area contact produce dust, reduce the safety of battery.For this, we propose a kind of power type cylindrical lithium ion battery pole piece structure. SUMMARY

[0004] In view of the existing electrode piece after slitting is wound, since the end of electrode piece is cut off during the process, cutter and pole piece material area contact produce dust, reduce the safety of battery, the utility model provides a kind of power type cylindrical lithium ion battery pole piece structure, with the advantages of effectively avoiding cutter and pole piece material area contact produce dust, effectively improve the qualified rate of winding, reduce the proportion of leakage black, spiral, improve the safety of battery use, and improve the stability of electrode piece whole, solve the problem proposed in the above background technique.

[0005] To achieve the above object, the utility model is realized by the following technical scheme:

[0006] A kind of power type cylindrical lithium ion battery pole piece structure, including the electrode piece body being wound and arranged in shell, the end of shell is sealed by end cover, one side of electrode piece body is coating area, and pole lug is arranged at one end of electrode piece body, the end of pole lug is reserved light foil, one side of pole lug is connected with extension plate, and extension plate is in contact with end cover conductive disc of end cover bottom.

[0007] Optionally, the length of the reserved light foil is 5-15mm.

[0008] Optionally, the thickness of the pole lug is 0.05-0.2mm.

[0009] Optionally, the width of the pole lug is 2-6mm.

[0010] Optionally, the bottom of the end cover conductive disc is provided with a positioning rod, and the extension plate is provided with a through hole, the extension plate is bent and in contact with the positioning rod, and the positioning rod penetrates through the through hole.

[0011] Optionally, the positioning rod is fastened with the end cover conductive disc through the fixing seat.

[0012] Compared with the prior art, the utility model has the advantages of:

[0013] 1、The power type cylindrical lithium ion battery pole piece structure, through the setting of the reserved light foil, can effectively avoid the contact between the cutter and the pole piece material area to produce dust, effectively improve the qualified rate of winding, reduce the proportion of black leakage and spiral, and improve the safety of battery use.

[0014] 2、The power type cylindrical lithium ion battery pole piece structure, through the extension plate bending and contacting with the positioning rod, the positioning rod is arranged through the through hole at this time, which can effectively improve the stability of the whole electrode piece. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 It is the connection schematic view of the electrode piece body and the reserved light foil of the utility model.

[0016] Fig. 2 It is the connection schematic view of the electrode piece body and the shell of the utility model.

[0017] Fig. 3 It is the connection schematic view of the positioning rod and the end cover of the utility model.

[0018] In the drawing: 1, electrode piece body; 2, coating area; 3, extension plate; 4, through hole; 5, reserved light foil; 6, shell; 7, end cover conductive disc; 8, end cover; 9, fixing seat; 10, positioning rod; 11, pole lug. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0020] Please refer to Figs. 1-3The utility model provides a technical scheme: a power type cylindrical lithium ion battery pole piece structure, including the electrode piece piece body 1 of winding setting in the shell 6, one side of electrode piece piece body 1 is coating area 2, when actually using, setting the pole lug 11 at one end of electrode piece piece body 1, and the thickness of pole lug is 0.05-0.2mm, the width of pole lug is 2-6mm, and the end of pole lug 11 is reserved light foil 5, when producing and processing, the length range of reserved light foil 5 is set at 5-15mm, namely when cutting operation, the cutting place is empty foil, avoids the contact of cutting knife and pole piece material area to produce dust, improves the security of battery, then makes the qualified rate of winding improve, controls the proportion reduction of black leakage, spiral, and then makes the strength of empty foil winding after center hole collapse can improve.

[0021] Further, as shown in Fig. 2 、 3 The end of shell 6 is sealed through end cover 8, and extension plate 3 is connected on one side of pole lug 11; during actual production and installation, extension plate 3 is bent to contact end cover conductive disc 7 at the bottom of end cover 8; in order to further facilitate quick installation of extension plate 3 and end cover 8, positioning rod 10 is arranged at the bottom of end cover conductive disc 7; positioning rod 10 is fastened with end cover conductive disc 7 through fixing seat 9; in order to facilitate quick and stable connection of extension plate 3 and the bottom of end cover 8, through hole 4 is arranged on extension plate 3.

[0022] In summary, the power type cylindrical lithium ion battery pole piece structure, when in use, extension plate 3 is bent to contact positioning rod 10; at this time, positioning rod 10 is arranged through through hole 4, which can effectively improve the stability of the whole electrode piece, and the reserved light foil 5 can effectively avoid the contact of cutting knife and pole piece material area to produce dust, effectively improve the qualified rate of winding, reduce the proportion of black leakage and spiral, and improve the safety of battery use.

[0023] In the description of the utility model, it is necessary to explain that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model; the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance, in addition, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements inside. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances. Moreover, the terms "include", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes the elements inherent in such process, method, article or device.

[0024] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A power-type cylindrical lithium-ion battery electrode structure, comprising an electrode sheet (1) wound and disposed within a housing (6), characterized in that: The end of the housing (6) is sealed by the end cap (8), one side of the electrode sheet (1) is the coating area (2), and an electrode tab (11) is provided at one end of the electrode sheet (1); The end of the tab (11) is reserved with a light foil (5), and an extension plate (3) is connected to one side of the tab (11). The extension plate (3) is in contact with the end cap conductive disk (7) at the bottom of the end cap (8).

2. The power-type cylindrical lithium-ion battery electrode structure according to claim 1, characterized in that: The length of the reserved foil (5) is 5-15mm.

3. The power-type cylindrical lithium-ion battery electrode structure according to claim 1, characterized in that: The thickness of the tab (11) is 0.05-0.2 mm.

4. The power-type cylindrical lithium-ion battery electrode structure according to claim 1, characterized in that: The width of the tab (11) is 2-6 mm.

5. A power-type cylindrical lithium-ion battery electrode structure according to any one of claims 1-4, characterized in that: The bottom of the end cap conductive disk (7) is provided with a positioning rod (10), and the extension plate (3) is provided with a through hole (4). The extension plate (3) is bent and contacts the positioning rod (10), and the positioning rod (10) is set through the through hole (4).

6. The power-type cylindrical lithium-ion battery electrode structure according to claim 5, characterized in that: The positioning rod (10) is fastened to the end cover conductive plate (7) via the fixing seat (9).

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