CN201149877Y

CN201149877Y - Battery electrode drawing-off sealing structure

Info

Publication number: CN201149877Y
Application number: CNU2008200316466U
Authority: CN
Inventors: 黄学杰; 王超
Original assignee: SUZHOU PHYLION BATTERY CO Ltd
Current assignee: Phylion Battery Co Ltd
Priority date: 2008-01-28
Filing date: 2008-01-28
Publication date: 2008-11-12
Anticipated expiration: 2018-01-28

Abstract

The utility model discloses an electrode extraction sealing structure for a battery, which includes a shell cover, electrode posts perforating the upper electrode post holes on the shell cover, sealing gaskets between the shell cover and the electrode posts, and insulation gaskets which are nested on the electrode posts and arranged between the shell cover and connecting pieces. The structure is characterized in that the electrode post is square cone shape; the electrode post hole on the shell cover matches with the outer flange of the electrode and extends to the connecting piece side along the outer wall of the electrode post and props the lower side of the insulation gasket, forming a sealing annulus wall; the sealing gasket is embedded between the inner side wall of the sealing annulus wall and the electrode post. The utility model realizes the anti-rotation and sealing between the electrode post and the shell cover by the cone shape structure electrode which has a polygon section, and avoids the arrangement of an anti-rotation gasket with simplified structure; meanwhile, a close sealing is realized by the cone shape surface, and the service life is prolonged.

Description

Battery electrode is drawn hermetically-sealed construction

Technical field

The utility model relates to a kind of battery electrode ejector, is specifically related to a kind of battery electrode and draws hermetically-sealed construction, is applicable on the bigger electrokinetic cell of overcurrent.

Background technology

The overcurrent capability of electrokinetic cell is bigger, generally can be about 200A, being applied to electric motor car, electric pushing-aid device etc. at present need have on the large-scale device of high power capacity, high-power characteristic, guaranteeing to require under the prerequisite of a constant volume battery can be at the above multiplying power discharging of 10C, thereby, the electrode that the electrokinetic cell electric weight is drawn draw be assembled in require in the fail safe also more strict.

The electrode of present jumbo dynamic lithium battery is drawn hermetically-sealed construction, shown in accompanying drawing 1, comprise: battery cap 12, pass the circular pole 11 of pole circular hole setting on the battery cap 12 and the seal washer between battery cap 12 and pole 11 15 and be placed on the pole 11, insulating washer 14 between cap 12 and brace 13, when assembling, general spot-welded together lug 17 and pole 11 earlier, insulate and sealed package with helicitic texture or riveted structure by cap then, for avoiding pole to twist in encapsulation or use that (lug that pole twisting will drive inside twists, location dislocation will easily cause battery to open circuit and short circuit), a sheathed anti-rotation pad 16 between brace and insulating washer, what have also is provided with spine at flange 18 places in pole hole, it is penetrated after assembling in the insulating washer, play the effect of anti-rotation.

As mentioned above, electrode of the prior art is drawn the problem that hermetically-sealed construction still exists: 1. assembling parts is more, and operating process is complicated during encapsulation; 2. lug is fixedlyed connected with pole spot welding, and contact area is limited, and it is unreliable to connect, and has a strong impact on the consistency of the internal resistance of cell; 3. no matter being threaded or the riveted joint mode, all is to adopt pressure to seal close mode, belongs to flat seal, and sealing can not be reliably and with long-term; 4. seal washer adopts common " O " shape seal washer, compress the back in encapsulation and easily send out distortion, cause sealing effectiveness to descend, cause producing between pole and cap loosening, thereby influence being connected of pole and lug, (when heavy-current discharge, the lug pole will be if bad connection will cause resistance to increase and heating is serious to bring potential safety hazard and battery life to shorten problem, cause the battery local temperature excessively to improve, the serious entire cell that causes lost efficacy).

Summary of the invention

The utility model purpose provides a kind of battery electrode and draws hermetically-sealed construction, and by the improvement to structure, structure is more simple, makes easy to assembly fast, and sealing, anti-rotation performance are improved, and prolongs battery useful life.

For achieving the above object, the technical solution adopted in the utility model is: a kind of battery electrode is drawn hermetically-sealed construction, comprise cap, pass pole and the seal washer between described cap and pole that pole hole on the described cap is provided with and be placed on the pole, insulating washer between cap and brace, the cross section of described pole is a polygon, and the area of section at its top is less than the bottom section area, pole hole on the described cap cooperates with the pole outer rim, its flange is along the pole outer wall, extend to described brace side, be butted on the lower surface of described insulating washer, constitute the sealing ring wall, described seal washer is embedded between sealing ring wall madial wall and the described pole.

In the technique scheme, described hermetically-sealed construction can adopt and of the prior artly be spirally connected or rivet sealing assembling.When use is spirally connected mode, be positioned at the pole top, the brace place is provided with external screw thread, by the nut that the matches sealing assembling that is spirally connected; When using the riveted joint mode, by punching press pole bottom, a riveting molding.The cross section of described pole is a polygon, and promptly the cross section can be triangle, rectangle, pentagon etc., and the area of section upper end is less than the lower end, be taper type, utilize polygonal cross section, prevent that pole from reversing with respect to cap, save the setting of anti-rotation pad in the past, simplified assembling parts; And the setting of taper, make the seal washer that is sheathed on the pole outer wall keep closely contacting with pole, the expansionary force that utilizes the bottom, inclined-plane outwards to increase, the compressing seal washer contacts with cap, guarantee the reliability that seals, simultaneously, owing to reduced the setting of anti-rotation pad, the cap flange extends to the insulating washer bottom face, and the top end face of insulating washer directly contacts with brace, thereby has prolonged the length of cap flange, forms the sealing ring wall, prolonged the seal distance of cap immediately, improved sealing, tight effect through seal washer and pole.

Optimized technical scheme is, described pole is side's taper rivet, lug is sheathed on described pole bottom, through riveted and fixed, utilization riveted joint mode fixedly lug in pole, and finish the assembling of whole hermetically-sealed construction, seal process is simpler than the mode of being spirally connected, and lug can keep contacting reliably for a long time with pole.

In the technique scheme, be positioned at top and insulating washer and brace junction and be positioned at the bottom and the pole piece junction is respectively equipped with annular slot, the pole cross section at draw-in groove place is rounded, circular cross-section is convenient to be sheathed on the setting as brace, insulating washer, lug on the pole, and because the setting of draw-in groove, when making lug be placed in the pole bottom, the upper end of lug contacts with the draw-in groove wall of pole simultaneously, increased contact area, made both keep good conducting.

Because the technique scheme utilization, the advantage that the utility model compared with prior art has is:

1, since in the utility model the cross section of pole be polygon, can prevent that pole from respect to the reversing of cap or lug, comparing with structure in the past, saved the setting of anti-rotation pad, simplified hermetically-sealed construction and assembling process, enhance productivity, reduce cost;

2, because pole top cross-section area, constitutes the cone seal with cap less than the bottom section area, the expansive force that the pole bottom expands outwardly, the compressing seal washer keeps closely contacting with cap, forms permanently effective reliable sealing, prolongation battery useful life;

3, because the omission of anti-rotation pad can make the flange of cap obtain extending, form the sealing ring wall, thereby increased the seal distance between cap and pole, improved sealing effectiveness.

Description of drawings

Fig. 1 is a background technology structural representation of the present utility model;

Fig. 2 is the assembling cross-sectional schematic of the utility model embodiment one;

Fig. 3 is the A-A cross-sectional schematic of Fig. 2.

Wherein: 1, pole; 2, cap; 3, brace; 4, insulating washer; 5, seal washer; 6, annular slot; 7, sealing ring wall; 11, pole; 12, cap; 13, brace; 14, insulating washer; 15, seal washer; 16, anti-rotation pad; 17, lug; 18, flange.

Embodiment

Below in conjunction with drawings and Examples the utility model is further described:

Embodiment one: extremely shown in Figure 3 referring to Fig. 1, a kind of battery electrode is drawn hermetically-sealed construction, comprise cap 2, pass pole 1 that pole hole on the described cap 2 is provided with and the seal washer between described cap 2 and pole 15 and be placed on the pole 1, insulating washer 4 between cap 2 and brace 3, described pole 1 side of being taper, pole hole on the described cap 2 cooperates with pole 1 outer rim, its aperture flange is along the pole outer wall, extend to described brace 3 sides, be butted on the lower surface of described insulating washer 4, constitute sealing ring wall 7, described seal washer 5 is embedded between sealing ring wall 7 madial walls and the described pole 1.Described pole 1 is positioned at the top, is provided with annular slot 6 with insulating washer 4 and brace 3 junctions, be positioned at the bottom simultaneously, also be provided with annular slot 6 with the lug junction, and pole 1 cross section at two described draw-in groove places is rounded.

In the present embodiment, described pole 1 is side's taper rivet, as shown in Figure 2, when assembling, after being sheathed on brace 3, insulating washer 4, cap 2, seal washer 5 and lug on the pole 1 respectively, wherein lug, brace 3 lay respectively in the corresponding draw-in groove with insulating washer 4, then a riveting molding, disposable solutions of problem such as the sealing of 2 of the conduction of 1 of lug and pole, pole 1 and caps, insulation, easy to assembly quick.

Claims

1. a battery electrode is drawn hermetically-sealed construction, comprise cap (2), pass described cap (2) go up the pole (1) that the pole hole is provided with and be positioned at described cap (2) and pole (1) between seal washer (5) and be placed on the pole (1), be positioned at the insulating washer (4) between cap (2) and the brace (3), it is characterized in that: the cross section of described pole (1) is a polygon, and the area of section at its top is less than the bottom section area, pole hole on the described cap (2) cooperates with pole (1) outer rim, its flange is along the pole outer wall, extend to described brace side, be butted on the lower surface of described insulating washer, constitute sealing ring wall (7), described seal washer (5) is embedded between sealing ring wall (7) madial wall and the described pole (1).

2. battery electrode according to claim 1 is drawn hermetically-sealed construction, it is characterized in that: described pole (1) is side's taper rivet, and lug is sheathed on described pole (1) bottom, through riveted and fixed.

3. battery electrode according to claim 1 is drawn hermetically-sealed construction, it is characterized in that: be positioned at top and insulating washer (4) and brace (3) junction and be positioned on the pole (1) of bottom and lug junction, be respectively equipped with annular slot (6), the pole cross section at draw-in groove place is rounded.