CN202616345U

CN202616345U - Square lithium-ferrous disulfide battery

Info

Publication number: CN202616345U
Application number: CN 201220311934
Authority: CN
Inventors: 袁中直; 刘玲; 余思恩; 刘金成
Original assignee: Eve Energy Co Ltd
Current assignee: Eve Energy Co Ltd
Priority date: 2012-06-30
Filing date: 2012-06-30
Publication date: 2012-12-19
Anticipated expiration: 2022-06-30

Abstract

The utility model relates to a square lithium-ferrous disulfide battery, which comprises a casing, a cover body, a battery cell and electrolyte, wherein the casing is generally in a square shape, the cover body and the casing are welded together, the battery cell is arranged in the casing, the battery cell comprises a positive plate, a negative plate and a diaphragm for separating the positive plate from the negative plate, the positive plate comprises ferrous disulfide, the negative plate is a lithium plate, and the structure of the battery cell is a first structure or a second structure. The square lithium-ferrous disulfide battery has the advantages that the manufacture method is simple, the batch production is convenient, various sizes can be customized according to application product requirements, and the market blank is filled. The square lithium-ferrous disulfide battery is mainly applied to high-end electronic products such as portable music players, electronic dictionaries, handheld computers, digital cameras and electric shaver, and the multi-aspect requirements of customers in the market are sufficiently met.

Description

Square lithium-ferrous disulfide battery

Technical field

The utility model relates to lithium primary battery, relates in particular to a kind of square lithium-ferrous disulfide battery.

Background technology

Lithium-ferrous disulfide primary cell in the market is main with pillar mainly, though performance and use can be satisfied most of clients' demand, but exists certain use limitation.High-end electronic products such as for example present portable music player, electronic dictionary, palmtop PC, digital camera and electric shaver all need use square sheet type lithium battery.

Summary of the invention

Based on this, be necessary to provide a kind of knot square lithium-ferrous disulfide battery.

A kind of square lithium-ferrous disulfide battery, is arranged on electric core and electrolyte in the housing at the lid that it comprises the housing that is square substantially, weld together with housing.Said electric core comprises the barrier film of positive plate, negative plate and isolation positive/negative plate.Positive plate comprises ferrous disulfide, and negative plate is the lithium sheet.The structure of said electric core be structure one with structure two in a kind of.In the said structure one; The electricity core comprises that a slice is by the strip negative pole of barrier film parcel; This strip negative pole that is surrounded by barrier film is through repeatedly bending counter-rotating formation is stacked; The electricity core comprises the multi-disc positive plate, and this multi-disc positive plate is separately positioned between the lamination of negative plate bending counter-rotating formation, forms effect anodal, that negative pole stacks successively.In the said structure two; The electricity core is takeup type; Comprise a slice strip positive plate, a slice strip negative plate and a slice strip barrier film; The head of positive plate that is positioned at the center is by barrier film bending counter-rotating parcel, and the head of head distance positive plate that is positioned at the negative plate at center has the volume pin rotation length of 3/4 circle at least.

The square lithium-ferrous disulfide battery manufacture method of the utility model is simple, be convenient to produce in batches, can fill a hole in the market according to the requirement customization various sizes of application product.Be mainly used in high-end electronic products such as portable music player, electronic dictionary, palmtop PC, digital camera and electric shaver in the market, be enough to satisfy many-sided demand of client on the market.

Description of drawings

Fig. 1 is the part cutaway view of the square lithium-ferrous disulfide battery of the utility model.

Fig. 2 is the structural representation of the electric core of the utility model one embodiment.

Fig. 3 is the method for winding sketch map of the electric core of another embodiment of the utility model.

Embodiment

To combine specific embodiment and accompanying drawing that the square lithium-ferrous disulfide battery of the utility model is described in further detail below.

See also Fig. 1, square lithium-ferrous disulfide battery mainly comprises housing 10, lid 20, electric core and electrolyte.Housing 10 is square substantially, and it welds together the composition confined space with lid 20, and electric core and electrolyte are placed in one.The electricity core is made up of the barrier film 50 of positive plate 30, negative plate 40 and isolation positive/

negative plate

30,40, can be stacked or takeup type, is flat square.Can be provided with collector or flow collection sheet in positive plate and the negative plate, it is provided with lug.

The active material of positive plate 30 is a ferrous disulfide, and conductive agent is a carbon class and/or graphite-like is solid-state or liquid, and negative plate 40 adopts pure metal lithium or lithium alloys.Barrier film is PP or PE individual layer, PP-PE bilayer, PP-PE-PP or three layers of PE-PP-PE or PP and materials such as PE surface metallization oxide such as aluminium oxide.Electrolyte is that lithium salts is dissolved in 1, the solution in the 3-dioxolanes equal solvent.Shell can be metal or nonmetallic materials such as aluminum plastic film, plastics such as steel, aluminium.Collector can be aluminium, nickel, steel or aluminium net, nickel screen, steel mesh etc.The lug material can be copper, steel, nickel or its composite material of two kinds.

The external packets of flat square electricity core is wrapped with insulating cement paper (not indicating), both can prevent that electric core from scattering, and can between insulator and housing 10 inner surfaces, form one deck dielectric film again, prevents that housing 10 and electric core from causing short circuit.Be sealed with positive terminal 70 through insulating material (for example glass insulator) on the lid 20.Positive plate 30 is provided with the anode ear 31 that links to each other with positive terminal 70.Also be welded with negative terminal 80 on lid 20 upper surfaces, negative plate 40 is provided with negative electrode lug 41, and negative electrode lug 41 can link to each other with housing 10 or lid 20, makes housing 10 own as GND with lid 20.

The outside of housing 10 is enclosed with one deck dielectric film 90, and positive terminal 70 passes dielectric film 90 with negative terminal 80, exposes in air.

The electric core of the utility model can have two kinds of structures: structure one and structure two.Wherein, structure one is as shown in Figure 2, and electric core only comprises a slice by the strip negative pole 40 of barrier film 50 parcels, and this strip negative pole 40 that is surrounded by barrier film 50 is through repeatedly bending counter-rotating formation is stacked.The electricity core comprises multi-disc positive plate 30, and this multi-disc positive plate 30 is separately positioned between the lamination of negative plate 40 bending counter-rotating formation, forms effect anodal, that negative pole stacks successively.

The preparation method of square lithium-ferrous disulfide battery mainly comprises the electric core of making; The shell that the electric core of making is packed into and is square basically; Battery cover is welded on the seal casinghousing that forms on the opening of shell except that liquid injection port, in housing, injects electrolyte, seal liquid injection port; And, repeat no more at this to the step that battery wears out and tests.Wherein, the preparation method of structure one comprises step:

S101 is cut into monolithic with the strip positive pole by preliminary dimension, all leaves lug on the every positive plate, and lug stretches out from the side of positive plate;

S102 cuts into strip with negative pole, and presses lug at an end of cutting out good strip negative plate, and lug is stretched out from the side of strip negative plate;

S103, the barrier film parcel is pressed with the negative plate of lug, and lug is stretched out from the limit portion of barrier film;

S104; Positive plate is overlayed on the negative plate that is surrounded by barrier film; Make an end part aligning of an end and the negative plate of positive plate; The negative plate that will be surrounded by barrier film then bends counter-rotating and is pressed on the positive plate, on the negative plate that is surrounded by barrier film of counter-rotating, stacks positive plate again, repeats to bend the action making lamination type electric core that counter-rotating is surrounded by the negative plate of barrier film and on the negative plate that is surrounded by barrier film of counter-rotating, stacks positive plate then; And

S105, lamination type electric core outerwrap barrier film also seals with high temperature resistant adhesive tape in that barrier film is terminal.

The electric core of structure two is takeup type, and it only comprises a slice strip positive plate, a slice strip negative plate and a slice strip barrier film.The head of positive plate that is positioned at the center is by barrier film bending counter-rotating parcel, and the head of head distance positive plate that is positioned at the negative plate at center has the volume pin rotation length of 3/4 circle at least.

The preparation method of the electric core of structure two is as shown in Figure 3, mainly comprises step:

S201 is rolling up doubling of strip barrier film and alignment bosses on the pin, and control volume pin revolves and turns around;

S202, the head that head is pressed with the strip positive plate of lug is placed on the barrier film near the volume pin, control volume pin rotation 3/4 circle;

S203 will make the strip positive plate between barrier film in the barrier film counter-rotating on upper strata;

S204, the head that head is pressed with the strip negative plate of lug is placed on the barrier film near the volume pin, and rotation volume pin is reeled up to positive/negative plate and is finished;

S205 seals with high temperature resistant adhesive tape at the barrier film end.

In addition, anodal preparation method comprises:

Bonding agent and solvent are put into mixer to be required to revolve round the sun and glue is processed in rotation with predetermined;

Anode sizing agent was processed in the stirring of adding positive electrode active materials after the adding conductive agent stirred the scheduled time in glue;

By predetermined face density anode sizing agent is coated on the collector, and under predetermined temperature, slurry is dried;

The collector that is coated with slurry divided after with the pair roller roll-in be cut to strip, and soldering polar ear is processed positive plate respectively.

When the square lithium-ferrous disulfide battery of actual assembled; At first make the electric core of flat square; Wrap up the high-temperature insulation gummed paper in the outside of electric core again, the outside that in parcel high-temperature insulation gummed paper, needs the negative electrode lug 41 on the anode ear on the positive plate 30 31, the negative plate 40 to be passed the insulation gummed paper exposes in air, should insert in the housing 10 by the electricity core then; Make positive and negative lug 31,41 be in the opening part of housing 10; Through spot welding the negative electrode lug 41 that is provided with on the negative plate 40 is welded on the shell wall of housing 10 opening parts again, makes housing 10 become the negative pole of battery, again the positive terminal 70 on anode ear that is provided with on the positive plate 30 31 and the lid 20 is welded; For avoid positive and negative lug positive and negative 31, touch each other between 41 and cause battery short circuit; Lug 31,41 except respectively with the welding position of housing 10 and positive terminal 70, all the other exposed aerial parts all need coat the high-temperature insulation gummed paper, then lid 20 and housing 10 are welded together; Make housing 10 and lid 20 negative poles own as battery; Inject electrolyte and seal liquid injection port from liquid injection port then, sticking insulating cement except that positive terminal 70 and the surface the negative terminal 80 on the lid 20 more at last, then the housing 10 outside bread that contact with air are wrapped dielectric film 90; Accomplish the assembling of a cell, this cell can be directly installed on the power supply place of electronic equipment.

The above embodiment has only expressed several kinds of execution modes of the utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model claim.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the utility model design, can also make some distortion and improvement, these all belong to the protection range of the utility model.Therefore, the protection range of the utility model patent should be as the criterion with accompanying claims.

Claims

1. square lithium-ferrous disulfide battery, is arranged on electric core and electrolyte in the housing at the lid that it comprises the housing that is square substantially, weld together with housing, and said electric core comprises the barrier film of positive plate, negative plate and isolation positive/negative plate; Positive plate comprises ferrous disulfide, and negative plate is the lithium sheet, it is characterized in that, the structure of said electric core be structure one with structure two in a kind of;

In the said structure one; The electricity core comprises that a slice is by the strip negative pole of barrier film parcel; This strip negative pole that is surrounded by barrier film is through repeatedly bending counter-rotating formation is stacked; The electricity core comprises the multi-disc positive plate, and this multi-disc positive plate is separately positioned between the lamination of negative plate bending counter-rotating formation, forms effect anodal, that negative pole stacks successively;

In the said structure two; The electricity core is takeup type; Comprise a slice strip positive plate, a slice strip negative plate and a slice strip barrier film; The head of positive plate that is positioned at the center is by barrier film bending counter-rotating parcel, and the head of head distance positive plate that is positioned at the negative plate at center has the volume pin rotation length of 3/4 circle at least.