CN203427359U

CN203427359U - V-shaped mold chain applied to lithium ion battery hot press

Info

Publication number: CN203427359U
Application number: CN201320449743.8U
Authority: CN
Inventors: 于海彬
Original assignee: Tianjin Lishen Battery JSCL
Current assignee: Tianjin Juyuan New Energy Technology Co ltd
Priority date: 2013-07-25
Filing date: 2013-07-25
Publication date: 2014-02-12
Anticipated expiration: 2023-07-25

Abstract

The utility model discloses a V-shaped mold chain applied to a lithium ion battery hot press. The V-shaped mold chain comprises a plurality of V-shaped single molds and a glass grid adhesive tape; the hot press comprises a plurality of hot press plates; each V-shaped single mold is positioned on one side of each hot press plate; the glass grid adhesive belt crosses the hot press plates; the two ends of the glass grid adhesive belt are bonded with the V-shaped single molds positioned on both sides of the hot press plate respectively. The V-shaped mold chain has the advantages of simple structure, convenience in manufacturing, easiness and rapidness in replacing and long service life; a used material, namely, PET (Polyethylene Terephthalate) and the glass grid adhesive tape are low in costs, so that the production cost is reduced; the V-shaped molds have high flatness, so that the defect of battery indentations is reduced, and the yield is increased greatly; the V-shaped molds have high heat conducting performance, so that the reliability of temperature is ensured; the sizes of the V-shaped molds can be adjusted conveniently according to different battery models.

Description

A kind of for the V-arrangement mould chain on lithium ion battery hot press

Technical field

The utility model relates to lithium ion battery production technical field, particularly relates to a kind of for the V-arrangement mould chain on lithium ion battery hot press.

Background technology

Lithium ion polymer battery in process of production, needs, through hot pressing process, to complete hot pressing polymerization process.Hot pressing polymerization refers to that the binding agent being coated with on barrier film melts the process of barrier film and positive and negative pole material tight bond under uniform temperature condition, and object is to make pole piece and barrier film close contact.Apparent cell integrated hardening, physical strength increase, the less thick of showing as.Pressure, temperature, time are the three elements that guarantee hot pressing polymerization, and hot pressing module need guarantee the flatness that heating platen is good, make in planar range stressed evenly, simultaneous temperature will be aspired for stability.In order to meet above requirement, traditional method is to put silica gel sheath on hot pressing module metallic plate, and in the both sides of silica gel sheath, pastes the situation generation of Teflon adhesive tape to prevent that silica gel sheath clings battery under uniform temperature and pressure.

But in traditional silica gel sheath use procedure, shown a lot of deficiencies: (1) adhesive tape is in hot pressing repeatedly, and silica gel sheath repeatedly expands and shrinks, easily there is horizontal fold in adhesive tape, causes battery impression bad in middle part; (2) it is consuming time longer that adhesive tape is changed operation, changes need 10 minutes; (3) the adhesive tape replacement cycle short, the replacement cycle is 1 month; (4) change in the process of adhesive tape, silica gel sheath easily damages; (5) Teflon adhesive tape cost is higher, and production cost is increased; (6) the most important thing is, battery pole group the latter half in heating platen always in hot pressing, operation for a long time, is difficult to guarantee the stressed uniformity in battery pole group surface, can cause the generation inconsistency of hot pressing polymerization effect and cell thickness.

Summary of the invention

The purpose of this utility model is for the technological deficiency existing in prior art, and provide a kind of for the V-arrangement mould chain on lithium ion battery hot press, can freely according to battery size, complete easily the adjustment of the hot pressing module degree of depth, to guarantee that the utmost point group of lithium ion battery is positioned at the centre position of heating platen, make battery pole group stressed evenly, guarantee the uniformity of hot pressing polymerization effect and cell thickness.

For realizing the technical scheme that the purpose of this utility model adopts, be: a kind of for the V-arrangement mould chain on lithium ion battery hot press, it is characterized in that comprising a plurality of V-arrangement mold monomers and glass grid adhesive tape; Described hot press comprises a plurality of heating platens, and described V-arrangement mold monomers is positioned at a side of heating platen; Described glass grid adhesive tape strides across heating platen, and its two ends are the bonding V-arrangement mold monomers that is positioned at heating platen both sides respectively.

Described V-arrangement mold monomers be by two large little identical bonding forming V-shapes of PET film or by a PET film along its center line doubling forming V-shape.

Operation principle of the present utility model is: lithium ion polymer battery is when carrying out the production of full-automatic hot-pressing operation, in certain temperature, under pressure and time parameter limit, cover has the hot pressing metallic plate of silica gel sheath that battery is pushed, under the effect of silica gel sheath, pressure between hot pressing metal plates is able to homogenising, the good PET of flatness contacts with battery surface, uniform pressure in planar range is delivered on battery, simultaneously, conduction of heat by silica gel sheath and PET passes to battery by the temperature of hot pressing metal plates, thereby guarantee effectively completing of hot pressing polymerization.In hot pressing repeatedly, V-type mould chain is also in opening and closing repeatedly, each battery is all under the effect of V-type mould chain, position improves with respect to heating platen bottom, make battery pole group be positioned at the centre position of heating platen, thereby guaranteed the stressed uniformity of battery pole group, guaranteed the uniformity of hot pressing polymerization effect and cell thickness.In addition, silica gel sheath is also upholding and contraction process repeatedly, because V-type mould chain is directly enclosed within on the heating platen of hot press, relatively independent with silica gel sheath, can not be out of shape because of the extension repeatedly of silica gel sheath and contraction, the situation that does not more have Teflon adhesive tape fold in prior art occurs.

Described PET film and glass grid adhesive tape form, described PET film is folded to form V-type mold monomers, and with glass grid adhesive tape, 12 V-type mold monomers are connected successively, form a set of V-type mould chain, directly be enclosed within on hot pressing module heating platen, V-type mould chain is easy to make, take conveniently, easy to clean;

Compared with prior art, the beneficial effects of the utility model are: simple in structure, easy to make, change simple to operate, quick, long service life; The cost of material therefor PET and glass grid adhesive tape is lower, has reduced production cost; V-type mold formation degree is better, has reduced battery impression bad, has greatly promoted yields; V-type mould heat conductivility is good, has guaranteed the reliability of temperature; V-type mould can also, according to the difference of battery size, carry out the adjustment of die size easily.

Accompanying drawing explanation

Figure 1 shows that the lithium ion battery structure schematic diagram that need to carry out hot-pressing processing;

Figure 2 shows that V-arrangement mould chain structure schematic diagram;

Figure 3 shows that the working state schematic representation of lithium ion battery V-arrangement mould chain when hot pressing;

Structural representation while Figure 4 shows that hot press hot pressing lithium ion battery.

In figure: 1: battery airbag, 2: battery pole group, 3: battery pole ear, 4: Double side seal side, 5: heating platen, 6: glass grid adhesive tape, 7:V shape mold monomers, 8: battery, 9: the cylinder of colding pressing, 10: conveyer belt, 11: hot pressing cylinder, 12: discharge pit, 13: pressure sensor, 14: metal fever pressing plate fixed bar, 15: cold-hot pressure module, 16: blowing station, 17: rewinding station.

The specific embodiment

Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.

Embodiment:

As shown in Figure 1, lithium ion battery comprises battery airbag 1, battery pole group 2, battery pole ear 3, and a side of battery pole group 2 is Double side seal side 4.

Be illustrated in figure 2 the V-arrangement mould chain on lithium ion battery hot press, comprise a plurality of V-arrangement mold monomers 7 and glass grid adhesive tape 6; Described hot press comprises a plurality of heating platens 5, and described V-arrangement mold monomers 7 is positioned at a side of heating platen 5; Described glass grid adhesive tape 6 strides across heating platen 5, and its two ends are the bonding V-arrangement mold monomers that is positioned at heating platen 5 both sides respectively.

Described V-arrangement mold monomers 7 is by two large little identical bonding forming V-shapes of PET film; Preferably, described V-arrangement mold monomers 7 is along its center line doubling forming V-shape by a PET film.More specifically, PET is cut to the oblong-shaped of the wide 125mm of growth 130mm, and carry out doubling along the long limit of rectangle neutrality line, form V-type mold monomers 7, one side is of a size of long 125mm, wide 65mm, and 12 V-type mold monomers are pasted together successively with the glass grid adhesive tape 6 of the wide 10mm of long 35mm, guarantee that the spacing between two glass grid adhesive tapes 6 is 80mm, and relatively symmetrical, form a set of complete V-type mould chain, spacing is controlled as shown in Figure 2.

From material, through measuring and calculating, the cost of making 1 cover V-type mould chain material requested PET and glass grid adhesive tape will be far smaller than the required Teflon adhesive tape cost of traditional silicon gum cover; In addition, pet sheet surface evenness is better, smooth, and can not cling battery and cause battery to drop in the middle of pressing plate; V-type mould chain and silica gel sheath are relatively independent, can be because of the extension repeatedly of silica gel sheath and contraction and be out of shape; The heat conductivility difference of PET film and Teflon adhesive tape, within the scope of ± 1 ℃, is less than variable temperatures scope ± 3 ℃ of technological requirement, and with PET, replace Teflon adhesive tape can not affect polymerization effect in temperature factor.

As shown in Figure 3, the V-type mould chain of making is arranged in full-automatic heating press hot pressing module, a kind of cell phone type polymer battery of take is example, the size of battery 8 is: length 90mm, width 34mm(Double side seal side is reserved 7mm), in full-automatic heating press hot pressing repeatedly, after battery is placed on V-type mould chain, the lower limb of battery pole group 2 is 21mm apart from the distance of the lower limb of heating platen 5, the top edge of utmost point group 2 is apart from the top edge 21mm left and right of heating platen 5, can guarantee that battery pole group 2 is positioned at the centre position of heating platen 5, thereby uniformity that utmost point group 2 is stressed and the uniformity of cell thickness have been guaranteed.

As shown in Figure 4, the plan structure schematic diagram while working for hot press, hot press comprises four lines heating platen 5, every a line heating platen 5 is provided with metal fever pressing plate fixed bar 14; In Fig. 4, hot press comprises 52 heating platens 5 altogether, and between adjacent two heating platens, 5 arrange a V-type mold monomers 7; First 12 batteries 8 are placed in to blowing station 16, by moving material handgrip, battery 8 are put into V-type mould chain; On the conveyer belt 10 of hot press, be distributed with 2 hot pressing cylinders 11 and 2 cylinders 9 of colding pressing; One side of conveyer belt 10 is provided with discharge pit 12.Described V-type mould chain be also provided with cold-hot pressure module 15; The end of described heating platen 5 arranges pressure sensor is installed, and when hot pressing cylinder 11 or the cylinder 9 of colding pressing promote heating platens 5, shrinks while reaching certain pressure, and cylinder stops continuing promote and bounce back; By moving material handgrip V-type mould chain that battery 8 is put into another row, proceed hot pressing or cold pressing; After hot pressing and colding pressing, by moving material handgrip, battery 8 is put into rewinding station 17.

The above is only preferred embodiment of the present utility model; it should be noted that; for those skilled in the art; do not departing under the prerequisite of the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.

Claims

1. for the V-arrangement mould chain on lithium ion battery hot press, it is characterized in that comprising a plurality of V-arrangement mold monomers and glass grid adhesive tape; Described hot press comprises a plurality of heating platens, and described V-arrangement mold monomers is positioned at a side of heating platen; Described glass grid adhesive tape strides across heating platen, and its two ends are the bonding V-arrangement mold monomers that is positioned at heating platen both sides respectively.

2. according to claim 1 a kind of for the V-arrangement mould chain on lithium ion battery hot press, it is characterized in that described V-arrangement mold monomers be by two large little identical bonding forming V-shapes of PET film or by a PET film along its center line doubling forming V-shape.