CN202662731U

CN202662731U - Electric core structure of lithium-ion power battery soft-packaged by anisotropic lugs

Info

Publication number: CN202662731U
Application number: CN2012202827585U
Authority: CN
Inventors: 杨全红; 李中延; 苏方远; 魏伟; 陈学成; 郑晓雨; 苏艳军; 张新河
Original assignee: Mcnair Technology Co Ltd; Dongguan Mcnair New Power Co Ltd
Current assignee: Mcnair Technology Co Ltd; Dongguan Mcnair New Power Co Ltd
Priority date: 2012-06-15
Filing date: 2012-06-15
Publication date: 2013-01-09
Anticipated expiration: 2022-06-15

Abstract

The utility model discloses an electric core structure of a lithium-ion power battery soft-packaged by anisotropic lugs. The electric core structure comprises wound cores, a positive pole lug, a negative pole lug and films, wherein each wound core is formed by lamination, arrangement and winding of a positive pole piece, a negative pole piece and a diaphragm, at least two wound cores are stacked together, the films are attached on the positive pole lug and the negative pole lug, and the positive pole lug and the negative pole lug are respectively positioned at the two opposite ends of the wound cores. According to the electric core structure of the lithium-ion power battery soft-packaged by the anisotropic lugs, disclosed by the utility model, an electric core is formed by stacking the multiple wound cores, so that the internal resistance of the battery is reduced; simultaneously, the positive pole lug and the negative pole lug are separately arranged at the two opposite ends of the wound cores, so that the problem of difficulty in top sealing of the multiple lugs is solved; and furthermore, the problems that the battery is prone to short circuit and overheating is caused when current is too high are avoided and relieved respectively.

Description

The core strueture of incorgruous lug method for soft package lithium ion power

Technical field

The utility model relates to the lithium ion battery as electrokinetic cell, particularly relates to a kind of core strueture of incorgruous lug flexible packing lithium ion battery.

Background technology

Along with the pay attention to day by day of country to low-carbon economy, ev industry as rising industry by people's extensive concern.Lithium ion battery is because the advantages such as energy density and power density height, long service life, environmental protection become the first-selection of the required battery of electric automobile.The general lighter weight of flexible packing lithium ion battery, security performance is good, especially along with aluminum plastic film rushes improving constantly of the box degree of depth, is subject to gradually people's favor.Yet in the middle of the battery core preparation process of aluminum plastic film soft-package battery, owing to often need to stack the rouleau core composition battery core that a plurality of coilings form, cause lug more, bring the closedtop difficulty, cause electrolyte to be revealed, have a strong impact on the use of battery.

Simultaneously, because battery capacity and use multiplying power are more and more higher, in order to solve the overheated problem of lug, often lug is widened.Because positive and negative lug is positioned at the same end of battery, wide lug can increase the probability of battery short circuit, causes potential safety hazard; Simultaneously because positive and negative lug all can produce a large amount of heat when large current work, thereby bring the overheated battery leakage problem that causes of aluminum plastic film and lug junction, had a strong impact on the use of electrokinetic cell.

Summary of the invention

Based on this, prior art problems such as being necessary at one end to bring closedtop difficulty, poor radiation for concentrating because of lug, easily being short-circuited, battery life is lacked provides a kind of core strueture of incorgruous lug flexible packing lithium ion battery.

For solving the problems of the technologies described above, the technical scheme that the utility model adopts is: a kind of core strueture of incorgruous lug method for soft package lithium ion power, it comprises volume core, positive pole ear, negative lug and film, described volume core is by positive plate, negative plate and barrier film stacked arrangement and intervolve and form, at least two in described volume core is stacked together, described film plaster is attached on positive pole ear and the negative lug, and described positive pole ear and negative lug lay respectively at the opposite end of described volume core.

Among embodiment, described positive plate and negative plate end when coating leaves to jump and is coated with the district therein, and described positive plate is aluminium foil, and the jumping of positive plate is coated with district's upper welding aluminium flake as positive wire; Negative plate is Copper Foil, and the jumping of negative plate is coated with the upper welding in district nickel sheet as negative wire.

Among embodiment, described positive wire is lateral alternate and in a row at one end therein, and welds with positive pole ear with film; Its negative wire is also in a row at other end lateral alternate, and welds with the negative lug with film.

Therein among embodiment, described positive wire and negative wire be the width of at least one positive wire of lateral alternate or negative wire one by one each other at volume core two ends.

The beneficial effects of the utility model are: by a plurality of volume cores are stacked the formation battery core, reduced the internal resistance of cell; Simultaneously, separately be provided with positive pole ear and negative lug at the opposite end of rolling up core, solved a plurality of lug closedtop hard problems; And, avoided the easy short circuit of battery, alleviated the problems of excessive heat that causes when electric current is excessive.

Description of drawings

Fig. 1 is perspective view of the present utility model;

Fig. 2 is the volume core perspective view among Fig. 1.

Embodiment

Referring to accompanying drawing 1 and accompanying drawing 2, a kind of core strueture of incorgruous lug method for soft package lithium ion power, it comprises volume core 3, positive pole ear 4, negative lug 5 and film 6,3 at least two in described volume core is stacked together, described film plaster is attached on positive pole ear and the negative lug, and described positive pole ear 4 and negative lug 5 lay respectively at the opposite end of described volume core 3.

Described volume core 3 is by positive plate, negative plate and barrier film stacked arrangement and intervolve and form, and positive plate and negative plate end when coating leaves larger area and jumps and be coated with district's (not shown).Positive plate is aluminium foil, and the jumping of positive plate is coated with district's upper welding aluminium flake as positive wire 1; Negative plate is Copper Foil, and the jumping of negative plate is coated with the upper welding in district nickel sheet as negative wire 2; Positive plate and negative plate stack by positive wire 1 and negative wire 2 rightabout orders, place barrier film between positive plate and the negative plate, and adjust respectively positive wire 1 and negative wire 2 and be coated with welding position in the district in jumping, guarantee that positive wire 1 and negative wire 2 are at the volume core 3 opposite ends width of at least one positive wire 1 of lateral alternate or negative wire 2 one by one each other.

Described film 6 adopts the chlorinated polypropylene structure, and described film 6 is attached at respectively on described positive pole ear 4 and the negative lug 5.

In the utility model when assembling,, at first, described volume core 3 is stacked together, and its positive wire 1 is lateral alternate and in a row at one end, and welds with positive pole ear 4 with film 6; Its negative wire 2 is also in a row at other end lateral alternate, and welds with the negative lug 5 with film 6; Then the volume core 3 after will being weldingly connected with aluminum plastic film has wrapped and has sealed.

In sum, the core strueture of a kind of incorgruous lug method for soft package lithium ion power of the utility model by a plurality of volume cores are stacked the formation battery core, has reduced the internal resistance of cell; Simultaneously, separately be provided with positive pole ear 4 and negative lug 5 at the opposite end of rolling up core 3, solved a plurality of lug closedtop hard problems; And, avoided the easy short circuit of battery, alleviated the problems of excessive heat that causes when electric current is excessive.

The above embodiment has only expressed several execution mode of the present 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 without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection range of the present utility model.Therefore, the protection range of the utility model patent should be as the criterion with claims.

Claims

1. the core strueture of an incorgruous lug method for soft package lithium ion power, it is characterized in that: comprise volume core, positive pole ear, negative lug and film, described volume core is by positive plate, negative plate and barrier film stacked arrangement and intervolve and form, at least two in described volume core is stacked together, described film plaster is attached on positive pole ear and the negative lug, and described positive pole ear and negative lug lay respectively at the opposite end of described volume core.

2. the core strueture of incorgruous lug method for soft package lithium ion power according to claim 1, it is characterized in that: described positive plate and negative plate end when coating leaves to jump and is coated with the district, described positive plate is aluminium foil, and the jumping of positive plate is coated with district's upper welding aluminium flake as positive wire; Negative plate is Copper Foil, and the jumping of negative plate is coated with the upper welding in district nickel sheet as negative wire.

3. the core strueture of incorgruous lug method for soft package lithium ion power according to claim 1 is characterized in that: described positive wire is lateral alternate and in a row at one end, and welds with positive pole ear with film; Its negative wire is also in a row at other end lateral alternate, and welds with the negative lug with film.

4. the core strueture of incorgruous lug method for soft package lithium ion power according to claim 3 is characterized in that: described positive wire and negative wire are at the volume core opposite end width of at least one positive wire of lateral alternate or negative wire one by one each other.