CN201717328U

CN201717328U - Vibration resistant long-life polymer lithium ion secondary battery

Info

Publication number: CN201717328U
Application number: CN201020209628XU
Authority: CN
Inventors: 李刚; 郭道传
Original assignee: DONGGUAN JINSAIER BATTERY TECHNOLOGY Co Ltd
Current assignee: DONGGUAN JINSAIER BATTERY TECHNOLOGY Co Ltd
Priority date: 2010-05-31
Filing date: 2010-05-31
Publication date: 2011-01-19
Anticipated expiration: 2020-05-31

Abstract

A vibration resistant long-life polymer lithium ion secondary battery belongs to the field of polymer lithium ion batteries and comprises a positive pole plate formed by coating anode paste made of anode active materials on an conductive foil, drying the foil prior to roller pressing and densification and slitting, and a negative pole plate formed by coating cathode paste made of cathode active materials on a conductive foil, drying the foil prior to roller pressing and densification and slitting. A plurality of transverse reserved spacings and a plurality of longitudinal reserved spacings are formed on the conductive foil coated with the anode paste or the cathode pate, and the positive pole plate or the negative pole plate are slit from the transverse reserved spacings and the longitudinal reserved spacings. The vibration resistant long-life polymer lithium ion secondary battery can bear external strong vibration, finely avoids the problems of micro short circuit formed from pole plate powder removal and relevant failures, and maintains fine stability and reliability in vibrations during use of electric cars, electric bicycles and the like.

Description

Vibration resistance long-life polymer lithium ion secondary battery

Technical field

The utility model relates to a kind of polymer Li-ion battery field, particularly relates to a kind of vibration resistance long-life polymer lithium ion secondary battery.

Background technology

Referring to Fig. 1, the common manufacture method of polymer lithium ion secondary battery is that positive active material 2 is made anode sizing agent, negative electrode active material 10 is made cathode size, anode sizing agent or cathode size are coated on the conduction foil 1 with coating direction 4 (direction shown in the arrow) by the horizontal prepared separation 3 of battery size size, carry out the roll-in density after the oven dry, cut into the strip pole piece 5 (referring to Fig. 2) of different in width then according to the size of battery size, again with its disconnected anode pole piece 6 (referring to Fig. 3) or cathode pole piece 7 (referring to Fig. 4) of being cut into, mode by coiling or lamination is made coiling body or lamination body, and encapsulation fluid injection activation forms battery.Yet known to ordinary person, when cutting bulk bread with cutter, it is unrestrained that section has crumbs certainly, and obviously, the flour stress of cross section place changes, and causes its adhesion to descend.Similarly, when cutting anode pole piece 6 or cathode pole piece 7, also exist the active material 8 (referring to Fig. 5) that comes off easily at the tangent plane place, this active material that comes off easily 8 can cause the inside battery micro-short circuit in the environment for use of vibration, even lost efficacy, under abominable situation, may on firely explode.

The utility model content

Technical problem to be solved in the utility model is, overcome above-mentioned the deficiencies in the prior art, a kind of vibration resistance long-life polymer lithium ion secondary battery is provided, the battery pole piece of this vibration resistance long-life polymer lithium ion secondary battery particularly changes the stress of both positive and negative polarity active material cutting Shi Buhui in the entire cell manufacture process, to keep its good adhesiving effect, guarantee that battery keeps reliable and stable in the strong vibration environment of various evils.

The technical scheme that its technical problem that solves the utility model adopts is: vibration resistance long-life polymer lithium ion secondary battery, be included in the anode sizing agent that coating is made by positive active material on the conduction foil, carry out the roll-in density after the oven dry, cut anode pole piece that forms and the cathode size that coating is made by negative electrode active material on the conduction foil, carry out the roll-in density after the oven dry, cut the cathode pole piece that forms, on the conduction foil of coating anode sizing agent or cathode size, be formed with many horizontal prepared separations and many vertical prepared separations, anode pole piece or cathode pole piece cut the position at laterally prepared separation and vertically prepared separation place.

In technique scheme, described anode pole piece or cathode pole piece are made coiling body or lamination body by the mode of coiling or lamination, and encapsulation fluid injection activation forms battery.

The beneficial effects of the utility model are: the vibration resistance long-life polymer lithium ion secondary battery of said structure, owing on the conduction foil of coating anode sizing agent or cathode size, be formed with many horizontal prepared separations and many vertical prepared separations, anode pole piece or cathode pole piece cut the position at laterally prepared separation and vertically prepared separation place, therefore, when cutting anode pole piece or cathode pole piece, can not switch to positive active material or negative electrode active material, not have positive active material or the negative electrode active material that comes off easily at the tangent plane place.By improving coating method, anode pole piece or cathode pole piece its section part forms when cutting positive active material that comes off easily or negative electrode active material have been prevented, guaranteed the reliability that positive active material or negative electrode active material are bonding, the battery of making can bear extraneous judder, the fabulous micro-short circuit and relevant Problem of Failure of having avoided the pole piece powder to come off and form make battery in use keep good stable and reliability in vibration environment such as electric automobile, electric bicycle etc.

Description of drawings

Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.

Fig. 1 is the coating method schematic diagram of prior art, and positive active material 2 is made anode sizing agent, anode sizing agent is coated on the conduction foil 1 with coating direction 4 (direction shown in the arrow) by the horizontal prepared separation 3 of battery size size;

Fig. 2 is the schematic diagram of cutting the strip pole piece of prior art, cuts into the strip pole piece 5 of different in width according to the size of battery size;

Fig. 3 is the schematic diagram of cutting anode pole piece of prior art;

Fig. 4 is the schematic diagram of cutting cathode pole piece of prior art;

Fig. 5 is there is the active material 8 that comes off easily in the anode pole piece of prior art at the tangent plane place a schematic diagram;

Fig. 6 is a coating method schematic diagram of the present utility model, and positive active material 2 is made anode sizing agent, anode sizing agent is coated on the conduction foil 1 with coating direction 4 (direction shown in the arrow) by the horizontal prepared separation 3 of battery size size and vertical prepared separations 9;

Fig. 7 is a schematic diagram of cutting the strip pole piece of the present utility model, cuts into the strip pole piece 5 of different in width according to the size of battery size;

Fig. 8 is a schematic diagram of cutting anode pole piece of the present utility model;

Fig. 9 is a schematic diagram of cutting cathode pole piece of the present utility model.

Among the figure, 1, the conduction foil; 2, positive active material; 3, horizontal prepared separation; 4, coating direction; 5, strip pole piece; 6, anode pole piece; 7, cathode pole piece; 8, the active material that comes off easily; 9, vertical prepared separation; 10, negative electrode active material.

Embodiment

Referring to Fig. 6, Fig. 7, Fig. 8 and Fig. 9, the described a kind of vibration resistance long-life polymer lithium ion secondary battery of present embodiment, be included in the anode sizing agent that coating is made by positive active material 2 on the conduction foil 1, carry out the roll-in density after the oven dry, cut anode pole piece 6 that forms and the cathode size that coating is made by negative electrode active material 10 on conduction foil 1, carry out the roll-in density after the oven dry, cut the cathode pole piece 7 that forms, on the conduction foil 1 of coating anode sizing agent or cathode size, be formed with many horizontal prepared separations 3 and many vertical prepared separations 9, anode pole piece 6 or cathode pole piece 7 cut the position at laterally prepared separation 3 and vertically prepared separation 9 places.Described anode pole piece 6 or cathode pole piece 7 are made coiling body or lamination body by the mode of coiling or lamination, and encapsulation fluid injection activation forms battery.

Manufacture method of the present utility model is: referring to Fig. 6, positive active material 2 is made anode sizing agent, negative electrode active material 10 is made cathode size, anode sizing agent or cathode size are coated on the conduction foil 1 with coating direction 4 (direction shown in the arrow) by many horizontal prepared separations 3 of battery size size and many vertical prepared separations 9, carry out the roll-in density after the oven dry, cut into the strip pole piece 5 (referring to Fig. 7) of different in width then according to the size of battery size, it cuts the position at vertical prepared separation 9 places, can not switch to positive active material 2 or negative electrode active material 10, again with its disconnected anode pole piece 6 (referring to Fig. 8) or cathode pole piece 7 (referring to Fig. 9) of being cut into, it cuts the position at horizontal prepared separation 3 places, can not switch to positive active material 2 or negative electrode active material 10 yet, mode by coiling or lamination is made coiling body or lamination body, and encapsulation fluid injection activation forms battery.By improving coating method, owing to can not switch to positive active material 2 or negative electrode active material 10, anode pole piece 6 or cathode pole piece 7 its section part forms when cutting positive active material that comes off easily 2 or negative electrode active material 10 have been prevented, guaranteed the reliability that positive active material 2 or negative electrode active material 10 are bonding, the battery of making can bear extraneous judder, the fabulous micro-short circuit and relevant Problem of Failure of having avoided the pole piece powder to come off and form make battery at vibration environment such as electric automobile, electric bicycles etc. in use keep good stable and reliability.

The above only is a preferred embodiment of the present utility model, is not to be used for limiting the utility model, and all its similar embodiment and approximate structure should be covered by the protection range of the utility model patent.

Claims

1. vibration resistance long-life polymer lithium ion secondary battery, be included in conduction foil (1) and go up the anode sizing agent that coating is made by positive active material (2), carry out the roll-in density after the oven dry, cut anode pole piece (6) that forms and the cathode size of making by negative electrode active material (10) in the last coating of conduction foil (1), carry out the roll-in density after the oven dry, cut the cathode pole piece (7) that forms, it is characterized in that: be formed with many horizontal prepared separations (3) and many vertical prepared separations (9) on the conduction foil (1) of coating anode sizing agent or cathode size, the position of cutting of anode pole piece (6) or cathode pole piece (7) is located at horizontal prepared separation (3) and vertical prepared separation (9).

2. vibration resistance long-life polymer lithium ion secondary battery according to claim 1 is characterized in that: described anode pole piece (6) or cathode pole piece (7) are made coiling body or lamination body by the mode of coiling or lamination, and encapsulation fluid injection activation forms battery.