CN2849982Y - Lithium cell packaging structure - Google Patents

Abstract

The utility model relates to a lithium cell packaging structure. An electric core of a lithium cell is arranged in a cavity which is formed after a surface shell and a bottom shell are folded. A wiring protective plate which is electrically connected with the electric core is also arranged in the cavity. The surface shell of the cavity and an upper fixing frame are connected into an integral body in a tight fit mode. The interior of the bottom shell and a lower fixing frame are connected into an integral body in the tight fit mode. After the upper fixing frame and the lower fixing frame are mutually jointed, an integral cell outer shell is formed and the surface shell and the bottom shell are ultrathin shell bodies which are made of stainless steel and are formed in a punching mode. The surface shell and the bottom shell are jointed by the upper fixing frame and the lower fixing frame which are in injection molding, after the surface shell and the bottom shell are jointed, the surface shell and the bottom shell are welded to be connected. The thickness of the electric core is 0.5-2.1 millimeters greater than a conventional full plastic packaging structure under the condition that a cell with the same thickness can be manufactured by the utility model, and the volume of the cell, i.e. the capacity of the cell is effectively increased; meanwhile, the anti-abrasion performance and the anti-impact capacity of a metal outer shell are high, and the damage of the electric core caused due to the easy breakage of a plastic outer shell is effectively avoided.

Description

A kind of lithium battery encapsulating structure

Technical field

The utility model relates to a kind of lithium battery structure, is meant a kind of electric core encapsulating structure of lithium ion battery especially.

Background technology

Because the advantage of capacity and all many-sides such as discharge time, volume, the lithium battery that adopts mostly is lithium ion/lithium polymer battery now, and along with the development of lithium-ion electric pool technology, its cost performance improves constantly, and causes it by all trades and professions extensive use.The same with other batteries, when lithium battery uses generally speaking also will by battery case or similarly the installation position install, and compress mechanism by spring etc. and position and be electrically connected, so these need built-in battery all have higher rigidity.But for lithium battery, its electric core adopts softer flexible package, thus must improve in the battery structure design, with the rigidity of raising battery itself with dwindle its shared space as far as possible and improve its volume capacity coefficient.At present, the lithium battery packing forms adopts plastic shell more, and plastic cement shell superpressure encapsulated, because the requirement of plastic mould moulding has limited the thickness of glue shell, if thickness is just very difficult and be difficult to ensure the safety of electric core less than 0.35 millimeter shaping, this reduces package thickness with lithium battery in the industry as far as possible, it is inconsistent with this idea that improves capacity to wish, but does not all have solution preferably always.

The utility model content

The problem that the utility model need solve provides a kind of ultra-thin shell mechanism, leaves more space for electric core by reducing outer casing thickness, to realize the increase on year-on-year basis of electric core volume.

Designed a kind of lithium battery encapsulating structure according to the above-mentioned problem that needs to solve; comprise the face-piece and the drain pan that are positioned at the lithium battery electric core upper and lower surface; the electricity core is arranged on face-piece and drain pan closes up in the chamber of back formation; also has the wiring baffle that electrically connects with electric core in the chamber; its face-piece fuses with tight fit mode and last fixed frame; fuse with tight fit mode and following fixed frame in the drain pan, the mutual involutory back of fixed frame forms the entire cell shell up and down.And, face-piece and drain pan be stainless steel through stamping forming ultra-thin housing, be combined to weld after involutory by fixed frame up and down between face-piece and drain pan and be connected through injection mo(u)lding.

Compared with prior art, the utility model can make electric core thickness Duo 0.5～2.1 millimeter than conventional overall plastic seal structure under the situation of making the same thickness battery, and the volume that makes battery is that capacity is increased effectively.Simultaneously, metal shell resistance to wears and the impact resistance height, has avoided the plastic shell cracky effectively and the electric core that causes damages.

Description of drawings

Accompanying drawing 1 is the parts decomposing schematic representation after the utility model assembling; Accompanying drawing 2 is parts decomposing schematic representations after the assembling of face-piece and drain pan in the accompanying drawing 1.

Embodiment

Thinking of the present utility model is the two-sided Baogang's lithium battery encapsulating structure of developing at the drawback of existing plastic cement shell encapsulation lithium battery of moulding.

With reference to accompanying drawing.Assembly of the present utility model comprises face-piece 1, drain pan 5 and the lithium battery electric core 3 that adopts the stainless sheet steel punching press to make; the last fixed frame 2 of face-piece and injection molded is tightened to one; the following fixed frame 4 of drain pan and injection molded is tightened to one, also is provided with the wiring baffle that electrically connects with electric core at the front end of drain pan.Add man-hour, at first the periphery through being injection-moulded in face-piece and drain pan forms complete " lid " and " at the bottom of the box ", when with after lithium cell assembling and putting into drain pan, fixed frame is involutory mutually up and down again, be connected by ultrasonic bonding between face-piece and drain pan and fix, so far finished the utility model design.

Claims (2)

1, a kind of lithium battery encapsulating structure comprises the face-piece (1) and the drain pan (5) that are positioned at lithium battery electric core (3) upper and lower surface, and electric core is arranged on face-piece and drain pan closes up in the chamber of back formation, also has the wiring baffle that electrically connects with electric core in the chamber, it is characterized in that

Face-piece fuses with tight fit mode and last fixed frame (2), fuses with tight fit mode and following fixed frame (4) in the drain pan, and the mutual involutory back of fixed frame forms the entire cell shell up and down.

2, lithium battery encapsulating structure according to claim 1, it is characterized in that described face-piece and drain pan be stainless steel through stamping forming ultra-thin housing, be combined to weld after involutory by fixed frame up and down between face-piece and drain pan and be connected through injection mo(u)lding.

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