CN205319251U

CN205319251U - Rechargeable battery

Info

Publication number: CN205319251U
Application number: CN201521129548.2U
Authority: CN
Inventors: 齐藤贵也; 杨映华; 董虹志
Original assignee: BEIJING FLIGHT BODA ELECTRONICS Ltd
Current assignee: Beijing North China new energy lithium battery equipment Technology Co. Ltd.
Priority date: 2015-12-30
Filing date: 2015-12-30
Publication date: 2016-06-15
Anticipated expiration: 2025-12-30

Abstract

The utility model provides a rechargeable battery which characterized in that: the battery polar body includes electric core more than two, just, negative pole utmost point ear, and just, the negative pole polar plate. Wherein battery tab and terminal coupling part have a recess and fillet, make two electric cores laminate together when folding behind the complete matching, and the operation degree of difficulty of battery when assembling that should design greatly reduced has improved the yields.

Description

A kind of chargeable battery

Technical field

The utility model belongs to secondary cell field, and the battery core particularly relating to a kind of lithium-ion-power cell connects structure.

Background technology

The energy and environment be the mankind enter 21st century must faced by two severe problems, continually developing of new forms of energy and clean reproducible energy is the important foundation of human social. Lithium secondary battery since from 60～seventies of 20th century, research starts development pole fast, this is because it just meets mobile communication and notebook computer develops the requirements such as power supply miniaturization, lightweight, long working hour, long circulation life, self-discharge rate is low, memory-less effect and environmental sound rapidly. Along with the development of modern society and the enhancing of people's environmental consciousness, the chargeable secondary cell of more and more equipment choice is as power supply, such as mobile phone, notebook computer, power tool box electromobile etc., this is that the application and development of chargeable secondary cell provides wide space. Electromobile and energy-accumulating power station etc. are it is generally required to use has the power cell of Large Copacity as power supply. These power cells, except having heavy body, also should have good security and longer cycle life etc., just can reach the standard of use and meet the demand of people.

Rectangular lithium ion battery is formed primarily of housing, pole, battery core, electrolytic solution and cover plate now, and battery core is made up of positive and negative plate and middle barrier film, positive and negative lug, by positive and negative lug projected current, is connected on the positive and negative pole on cover plate by positive and negative plate by the mode welded or rivet.

The capacity that existing demand is ionization cell is the bigger the better, in general by increase battery core size can capacity increasing, but exist a problem be that a battery core size can be too not big. Because there is multiple curling sheet material battery core inside, oversize then curling after can be raw certain to inner material producing sealing effect so that ion can not be normally through, and thus actual electricity can not increase proportionally.

Summary of the invention

The purpose of this utility model is to provide a kind of core strueture of solving the problem and battery.

Specifically, the utility model provides a kind of chargeable battery, it is characterised in that: battery pole body comprises two or more battery core, positive and negative electrode lug, positive and negative electrode pole plate.

Further, wherein, battery pole body also comprises the positive and negative electrode lug being electrically connected with battery core, and described positive and negative electrode lug is roughlyShape structure, comprises an our department and a terminal connection portion vertical with our department.

Further, wherein, described positive pole ear and/or negative lug have groove and/or concave indentation, at least one boundary place being positioned at our department and terminal connection portion of described concave indentation, described groove is one or more, and at least one wherein is positioned near concave indentation.

Further, wherein, also there is at least one concave indentation near the other end of groove.

Further, wherein, the shape of described concave indentation is arc, rectangle or irregular curve, it is preferable that, this concave indentation is fillet, oval angle.

Further, wherein, described groove is connected with concave indentation.

Further, wherein, groove, the degree of depth is about the 40% of lug thickness, and width is 0.5～5mm.

Further, wherein, it is characterised in that: described positive pole ear, plate material are aluminum or aluminum alloy, and negative lug, plate material are copper or copper alloy.

Further, wherein, also comprise: end cover for battery cells, battery container, fluid injection bolt.

Further, also comprise, end cover for battery cells, comprise battery cover board, pressure release valve, liquid filling hole and comprise the insulation sheet being positioned at outside anode and cathode terminals and being fixed to described terminal; Battery container, described housing has opening, it is possible to hold described battery pole body and electrolytic solution.

Technique effect

The present invention adopts the battery core of two or more, it is possible to the electricity that battery is provided linearly can increase along with the increase of battery core cumulative volume, obtains bigger electricity with as far as possible little volume.

And the utility model battery pole ear body and terminal connecting portion have groove and fillet, fitting to together after multiple battery core is alignd completely when folding, this design greatly reduces operation easier when battery is assembled, it is to increase good article rate. The folding location of lug can be there is inaccurate, the problem of battery bulge when two or more battery core is assembled.

Accompanying drawing explanation

Fig. 1 is the vertical view of the two core strueture of the utility model

Fig. 2 is the upward view of the two core strueture of the utility model

Fig. 3 is the utility model lug orthographic plan

Fig. 4 is the utility model lug partial enlargement figure

Fig. 5 is front view after the two core strueture doubling of the utility model

Fig. 6 is the two core strueture doubling lateral side view of the utility model

Fig. 7 is front view after the utility model lug bending

Fig. 8 is the utility model lug bending lateral side view

Fig. 9 is that the two core strueture of the utility model is to installation process view in housing

Embodiment

Below in conjunction with embodiment and Figure of description, the utility model is described in further detail, but enforcement mode of the present utility model is not limited to this.

Wherein: 1-cover plate, 2-pressure release valve, 3-liquid filling hole, 4-anode and cathode terminals, 5-battery container, 6-battery pole body, 7-battery core, 8-battery core positive pole, 9-positive pole ear, 10-positive plate, 11-battery core negative pole, 12-negative lug, 13-negative plate, 14-main body portion, 15-terminal connection portion, 16-fillet, 17-groove.

Below for a better embodiment, and come by reference to the accompanying drawings clearer the present invention to be intactly described.

See Fig. 1-9, show lithium ionic cell module of the present utility model, comprising:

End cover for battery cells, comprises battery cover board 1, pressure release valve 2, liquid filling hole 3 and comprises the anode and cathode terminals 4 etc. being positioned at outside. Battery container 5, described housing has opening, it is possible to hold described battery pole body 6 and electrolytic solution.

Battery pole body 6, comprise positive electrode and negative potential, two battery cores 7, positive electrode is made up of battery core positive pole 8 and positive pole ear 9, positive plate 10, negative potential is made up of battery core negative pole 11 and negative lug 12, negative plate 13, wherein battery core positive pole 8 is arranged between positive pole ear 9 and positive plate 10, and battery core negative pole 8 is arranged between negative lug 9 and negative plate 10.

See Fig. 3,4, wherein lug shape isShape, is divided into main body portion 14 and the terminal connection portion 15 vertical with main body portion, and the right angle interface place in main body portion and terminal connection portion has a fillet 16 respectively, and there is groove 17 in main body portion on the long limit extended line in terminal connection portion. The main body portion 14 of lug respectively negative or positive electrode with two battery cores be connected.

See Fig. 5-8, after two core strueture is installed, being bent by two core strueture along the groove on lug, such structure makes two battery cores can fit to after aliging completely together when folding, greatly reduce operation easier when battery is assembled, it is to increase good article rate.

In a preferred scheme, near the two ends of groove, it is provided with fillet, bends convenient like this.

Battery size can be 150*22*90mm, and described lug thickness is 1mm, and the groove degree of depth is about 40% 0.4mm of lug thickness, fillet diameter 3mm. Electrode thickness 0.1-0.3mm. Wherein at lug upper groove, width is 0.5～5mm.

The electric connection mode of battery core and lug, pole plate can have multiple, it is preferable to welding, it is more preferable to be resistance welding, ultrasonic welding. Such as: battery core, is wherein welded for pole plate, battery core, lug for welding together with lug mode of connection, solder joint two.

Described positive pole ear, plate material are aluminum or aluminum alloy, and negative lug, plate material are copper or copper alloy.

Can know that described fillet can use concave indentation to replace, such as rectangle, Polygons, irregular curve type, arc line shaped etc., the arc-shaped transition curve of 1 wherein preferably oval arc or variable curvature.

The assembly method of described battery comprises the following steps:

By pole plate, battery core, tab welding together, first, the wherein major surfaces in parallel of pole plate, battery core, lug;

Subsequently, lid body and pole are connected with said structure;

Then, along the groove bending on lug 90 degree so that be originally distributed in two battery core opposing terminal portion surface-normal of portion of terminal both sides, and fit tightly, align;

Finally, two battery cores of laminating after folding being inserted housing, and cover plate and housing is sealed, the mode of sealing can adopt ultrasonic welding, Vibration welding or heat-sealing etc.

For two battery cores, scheme of the present utility model is illustrated above, but can know, the battery core of two or more can be installed according to above-mentioned thinking, at the lug bending place of the battery core of two or more, groove or groove and fillet are set, the core strueture after bending can be made to coordinate accurately, easy for installation.

The above is only preferred implementation of the present utility model; it is noted that for those skilled in the art, under the prerequisite not departing from the utility model principle; can also making some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model. In addition, although employing some specific terms in this specification sheets, but these terms are only used to convenient explanation, and the utility model does not form any restriction.

Claims

1. a chargeable battery, it is characterised in that: battery pole body comprises two or more battery core, positive and negative electrode lug, positive and negative electrode pole plate.

2. battery according to claim 1, it is characterised in that: battery pole body also comprises the positive and negative electrode lug being electrically connected with battery core, and described positive and negative electrode lug is roughlyShape structure, comprises an our department and a terminal connection portion vertical with our department.

3. battery according to claim 2, it is characterized in that: described positive pole ear and/or negative lug have groove and/or concave indentation, at least one boundary place being positioned at our department and terminal connection portion of described concave indentation, described groove is one or more, and at least one wherein is positioned near concave indentation.

4. battery according to claim 3, it is characterised in that: also there is at least one concave indentation near the other end of groove.

5. battery according to claim 3, it is characterised in that: the shape of described concave indentation is arc, rectangle or irregular curve, it is preferable that, this concave indentation is fillet, oval angle.

6. battery according to claim 4, it is characterised in that: described groove is connected with concave indentation.

7. described battery according to claim 3, it is characterised in that: groove, the degree of depth is about the 40% of lug thickness, and width is 0.5～5mm.

8. battery according to claim 7, it is characterised in that: described positive pole ear, plate material are aluminum or aluminum alloy, and negative lug, plate material are copper or copper alloy.

9. according to the battery of one of claim 1-8, it is characterised in that, also comprise: end cover for battery cells, battery container, fluid injection bolt.

10. battery according to claim 9, it is characterised in that: also comprise,

End cover for battery cells, comprises battery cover board, pressure release valve, liquid filling hole and comprises the insulation sheet being positioned at outside anode and cathode terminals and being fixed to described terminal;

Battery container, described housing has opening, it is possible to hold described battery pole body and electrolytic solution.