CN205335365U

CN205335365U - Curved surface lithium ion battery

Info

Publication number: CN205335365U
Application number: CN201521007297.0U
Authority: CN
Inventors: 徐延铭; 李俊义; 邹浒
Original assignee: Zhuhai Coslight Battery Co Ltd
Current assignee: Zhuhai Coslight Battery Co Ltd
Priority date: 2015-11-27
Filing date: 2015-11-27
Publication date: 2016-06-22
Anticipated expiration: 2025-11-27

Abstract

The utility model provides a curved surface lithium ion battery, during the preparation to the initial winding diameter N circle of convoluteing in succession forms involute core, I), since N+1 circle, every roll of round just inserts a slice and rolls up the needle, and winding diameter that the winding diameter that makes each circle went up the round relatively increases an extension width, and (i) (until the completion of convoluteing, formation is located 1 outlying in the involute core and rolls up the core outward l, rolls up outward and forms the interval between adjacent ring of coiled material flex point in the core, the part that will be outward roll up core both sides extension width is along the outward flange of the involute core inward folding that makes progress, the anchor clamps that the adoption has the cambered surface of downward bulge carry out the hot pressing plastic to electric core, make the one side is the indent cambered surface for plane, another side lithium cell. The utility model discloses the battery that obtains can fully use the equipment headspace, improves electric core design capacity, and preparation technology is simple, be favorable to reduce cost.

Description

A kind of curved surface lithium ion battery

Technical field

This utility model belongs to polymer Li-ion battery manufacturing technology field, particularly relates to a kind of takeup type curved surface lithium ion battery。

Background technology

Along with the development of development of Mobile Internet technology, wearable intelligent equipment is becoming increasingly popular。But such as equipment such as intelligent watch, motion bracelets, it generally is arc or annular, to be worn in wrist, restriction by loop configuration or arcuate structure, if still adopting common rectangular battery, the parking space reserved for adapting to equipment, the volume of battery is generally less, the off-capacity of battery is to support device standby, and the flying power of battery is the short slab in the application of this kind equipment。

In order to adapt to the shape of similar wearable intelligent equipment, people develop the battery of flexibility or arc。A kind of arc battery core as disclosed in Chinese utility model patent application that publication number is CN103401024A, arc battery cell, arc battery composite structure and manufacture method, publication number is the disclosed a kind of flexible lithium ion battery of Chinese utility model patent application of CN103915646A, and a kind of manufacture method bending battery disclosed in the Chinese utility model patent application that publication number is CN103441306A, aforementioned patent can design according to the radian of equipment and produce arc battery core, but the processing technology of existing arc or curved surface battery core is all more complicated, equipment investment is significantly high, and battery core is after adopting arc fixture force, pole piece is made to force to be bent to form the overall structure of arc, easily there is drum or short-circuit potential safety hazard。

Utility model content

The purpose of this utility model is in that to provide a kind of curved surface lithium ion battery。

To achieve these goals, this utility model takes following technical solution:

A kind of curved surface lithium ion battery, including: interior core and be surrounded on the outer core outside described interior core, wherein, described interior core is formed with initial spooled diameter d wound N circle by coiled material, does not have interval between the flex point of described interior core adjacent web；Described outer core is often rolled up winding diameter d after a circle by coiled material_nIncrease an extension widthlWinding forms, and is each formed with interval between the flex point of described outer core adjacent web；The part of described outer core both sides extension width is along the outward flange upwards fold inward of interior core, and after hot pressing shaping, the one side of battery is plane, another side is inner concave arc surface。

From above technical scheme, the battery core of this utility model battery is made up of interior core and outer core, between the flex point of outer core adjacent web, there is certain intervals, this interval makes outer core beyond interior core outward flange, outer core is upwards bent inwards beyond the part of interior core, forming one side after hot pressing integer is plane, another side is the structure of inner concave arc surface, can be applied on the curved surface equipment of annular preferably, owing to the profile of this utility model battery core can be coincide with the space depositing battery core, improve parking space utilization rate, thus improve the stand-by time of battery core, and simplify production technology, advantageously reduce production cost。

Accompanying drawing explanation

In order to be illustrated more clearly that this utility model embodiment, the accompanying drawing used required in embodiment or description of the prior art will be done simple introduction below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings。

Fig. 1 is the structural representation of this utility model battery core；

Fig. 2 be this utility model battery core hot-forming after structural representation；

Fig. 3 is the structural representation of the lithium battery that this utility model battery core is made；

Fig. 4 is the structural representation of the another form of lithium battery that this utility model battery core is made。

Detailed description of the invention

In order to above-mentioned and other purpose of the present utility model, feature and advantage can be become apparent from, this utility model embodiment cited below particularly, and coordinate appended diagram, it is described below in detail。

The purpose of this utility model is to prepare a kind of curved surface lithium ion battery, the one side of this battery is flat, another side has aduncate radian, and curved surface lithium ion battery of the present utility model can better adapt to the battery storing space that circular device is reserved, to improve the design capacity of battery core。

The preparation method of curved surface lithium ion battery of the present utility model is as follows:

Adopt common process to prepare pole piece: to be coated with active substance in the side of negative current collector and make cathode pole piece, be coated with active substance in the both sides of plus plate current-collecting body and make anode pole piece；Negative current collector can adopt Copper Foil, and plus plate current-collecting body can adopt aluminium foil；

Anode pole piece, barrier film, cathode pole piece stack formation coiled material successively be wound, as it is shown in figure 1, during winding, coiled material, with initial spooled diameter d wound N circle, forms interior core 1, it is preferred that N≤9；

Coiled material encloses from N+1, often winding diameter d after volume one circle_nAll increase an extension widthl, namely the winding diameter of the winding diameter of N+1 circle is d+l, the winding diameter of the winding diameter of N+2 circle is d+2l, by that analogy, the winding diameter d of the n-th circle_n=d+ (n-N) ×lWherein, n=N+1, ..., M, N is the windings of interior core, M is total windings of battery core, increasing by inserting a piece of new volume pin realization of extension width, is often all inserted into a piece of new volume pin after volume one circle so that outside the n-th circle coiled material flex point and between inside the (n+1)th circle coiled material flex point, formation one is long islInterval, i.e. extension width, so circulate preparation, until having wound, being formed and being positioned at the outer core 2 of core 1 periphery, interior core 1 and outer core 2 constitute the battery core of structure as shown in Figure 1；When winding outer core, being formed with multiple interval between the flex point of the N-M circle adjacent web of battery core, the length at each interval isl；

By the part of the outer core 2 both sides extension width outward flange upwards fold inward along interior core 1；

Adopt the fixture with downwardly projecting cambered surface that battery core is carried out hot pressing shaping, and rubberizing is fixed, as shown in Figure 2；

According to battery core external appearance characteristic, the punching mould with indent arc is adopted to produce putamina, it is made to mate with core strueture, then battery core is packaged, subsequent handling is completed by conventional processes, after battery core fluid injection ageing, adopt fixture to carry out hot pressing aging and be melted into, the curved surface lithium ion battery of shape as shown in Figure 3 or Figure 4 can be obtained。Battery core hot pressing aging and be melted into can adopt to High Temperature High Pressure aging--normal temperature and pressure chemical conversion--technique that High Temperature High Pressure is aging；Or synchronously complete chemical conversion under High Temperature High Pressure aging conditions。

The battery core prepared of this utility model method is adopted to include core in one and the outer core being positioned at outside core, this interior core is formed with initial spooled diameter d wound N circle by coiled material, outer core is surrounded on the periphery of interior core, and outer core is often rolled up winding diameter d after a circle by coiled material_nAll increase an extension widthlWinding forms, and does not have interval, to be each formed with interval between the flex point of outer core adjacent web between the flex point of interior core adjacent web, and the length at this interval is extension widthl。

Curved surface battery of the present utility model can make full use of battery storing space as reserved in equipment such as annular, arcs, is conducive to improving battery core design capacity, thus improving the device standby time, solves the problem because being limit the device standby time caused short by battery capacity；And compared with existing arc or flexible battery, the curved surface of this utility model battery is partially folded to form by outer core extension width, preparation technology is simpler, advantageously reduces manufacturing cost。

Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses this utility model。The multiple amendment of these embodiments be will be apparent from for those skilled in the art, and generic principles defined herein when without departing from spirit or scope of the present utility model, can realize in other embodiments。Therefore, this utility model is not intended to be limited to embodiment illustrated herein, and is to fit to the widest range consistent with principles disclosed herein and features of novelty。

Claims

1. a curved surface lithium ion battery, it is characterised in that including: interior core and be surrounded on the outer core outside described interior core, wherein,

Described interior core is formed with initial spooled diameter d wound N circle by coiled material, does not have interval between the flex point of described interior core adjacent web；

Described outer core is often rolled up winding diameter d after a circle by coiled material_nIncrease an extension widthlWinding forms, and is each formed with interval between the flex point of described outer core adjacent web；

The part of described outer core both sides extension width is along the outward flange upwards fold inward of interior core, and after hot pressing shaping, the one side of battery is plane, another side is inner concave arc surface。

2. curved surface lithium ion battery according to claim 1, it is characterised in that: N≤9。