CN2461154Y

CN2461154Y - Battery top lid component containing safety valve

Info

Publication number: CN2461154Y
Application number: CN 01202424
Authority: CN
Inventors: 纪明均
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-01-04
Filing date: 2001-01-04
Publication date: 2001-11-21
Anticipated expiration: 2011-01-04

Abstract

The utility model relates to a battery upper lid plate component with a safety valve. The utility model is characterized in that a top metal base plate, a bottom metal base plate, and a metal foil which is nipped are combined to form the battery upper lid plate; the same positions of the top metal base plate and the bottom metal base plate are respectively provided with an explosion-proof hole; before the combination, the metal foil which is nipped can seal the explosion-proof hole for forming a safety valve; therefore, deformation or breakage caused by external force factors for the metal foil can be avoided, and the utility model can ensure the burst during a battery preset pressure value of the safety valve, which can prevent a battery from exploding accidentally.

Description

The cell cover board component that contains safety valve

The utility model relates to a kind of battery, specifically, relates to a kind of cell cover board component.

Along with miniaturization, the lightweight of portable formula electronic installation, the used battery of its power supply is also high more for the requirement of miniaturization, lightweight and high capacity.At this demand, developed a kind of " lithium ion battery " (abbreviation lithium battery), it is an installing anodal part (lithium ion and formed compounds such as special metal group and oxygen) in a battery case, negative pole spare (carbonaceous material) and electrolyte (having dissolved the non-proton property organic solvent of lithium salts), form in this battery case open end capping one upper cover plate again, for preventing that the rising of inside battery abnormal pressure from producing explosion and damaging, so be provided with safety valve in the hope of the excess pressure of releasing in upper cover plate, as Fig. 1, shown in 2, the safety valve of upper cover plate 10 was to form a groove 12 at metal substrate 11 book offices with cold-press method in the past, establishing impression 121 in bottom land (or the groove back of the body) system of this groove 12 again constitutes, when battery (figure do not show) when internal pressure is too high, can break through these impression 121 relieving pressures to prevent the battery explosion, because the making precision of this impression 121 quite is difficult to control, thereby make very difficult, because the uneven thickness of impression 121, so stability is not good.That the Taiwan patent of No. 363286 bulletin discloses is a kind of " be used for the safety flap assembly of battery and have the battery case lid of safety flap ", its structure as shown in Figure 3, provide a perforate 21 and moulding one storage tank 211 at upper cover plate 20 book offices, this storage tank 211 is inserted and be blended in to one safety flap assembly 22 with sealing perforate 21, thereby form a safety valve, this safety flap assembly 22 be on a metal substrate 221, provide an explosionproof hole 222 and in this metal substrate 221 bottom side pressure weldings one metal forming 223 with sealing explosionproof hole 222 and forming.In addition, as shown in Figure 4, also explosionproof hole 31 can be set on upper cover plate 30 directly, in these upper cover plate 30 bottom side pressure welding metal formings 32 with sealing explosionproof hole 31 to form safety valve, though having when battery (figure do not show), the relief valve design of above-mentioned upper cover plate 20,30 breaks through metal forming 223,32 when internal pressure is too high, and then but still still there is following shortcoming in relieving pressure to prevent the result of use of battery explosion:

One, because metal forming 223 envelopes places metal substrate 221 bottom sides; metal forming 32 is that envelope places upper cover plate 30 bottom sides; so metal forming the 223, the 32nd is exposed, does not have the state that other member can block protection; add metal forming 223,32 thickness quite thin (5～50 microns); and can push mutually unavoidably, stack because of upper cover plate 20,30 on production line, so metal forming 223,32 just very easily produces distortion, damaged, scratch because of external force factor.Like this, will change the default safety valve of battery and break through force value, and will break through metal forming 223,32 in the safe range, thereby cause battery failure, seriously cause cost waste and battery quality impaired when the change value of pressure of inside battery still is in.

Two, metal forming 223, the 32nd, be incorporated into metal substrate 221 by rolling wheel set with precompressed, on the upper cover plate 30, but, microcosmic explosionproof hole 222,31 peritreme, in fact remaining burr, the quite coarse and utmost point is like the structure of cutting edge, like this, when metal forming 223,32 by the direct roll-in sealing of rolling wheel set explosionproof hole 222,31 o'clock, this metal forming 223,32 very easily because of the direct roll-in of rolling wheel set, add explosionproof hole 222,31 peritreme is like factors such as cutting edges, metal forming 223,32 by the crush-cutting effect and very easily attenuation, distortion, damaged, thereby the default safety valve that has changed battery relatively breaks through force value, and when still being in the safe range, will break through the change value of pressure of inside battery metal forming 223,32, thus battery failure caused, finally cause cost waste and battery quality impaired.

The purpose of this utility model is to provide a kind of cell cover board component that contains safety valve; it can protect that metal forming makes that it is not damaged, distortion, scratch; thereby guarantee that it breaks with relieving pressure during in default safety valve pressure value at battery, thereby can prevent the battery explosion and keep battery quality.

For achieving the above object, the cell cover board component that contains safety valve of the present utility model, be characterized in: upper cover plate is to be made of top metal substrate and bottom metal substrate clip metal paper tinsel, this top metal substrate and substrate substrate coordination are provided with explosionproof hole, this metal forming is inserted between this top, the substrate substrate, this top metal substrate, metal forming and substrate substrate press together, and this metal forming sealing explosionproof hole is to form the safety valve of upper cover plate.

Adopt technique scheme of the present utility model; because of metal forming is interposed between top, the substrate substrate; so can protectedly make its indeformable, damaged, scratch; can guarantee the explosion when battery is preset the safety valve pressure value of this metal forming; thereby can prevent the battery explosion, can prevent the meaningless inefficacy of battery and can keep battery quality simultaneously.

Below by a preferred embodiment and accompanying drawing the cell cover board component that contains safety valve of the present utility model is elaborated, in the accompanying drawing:

Fig. 1 is the stereogram of cell cover plate in the past;

The cutaway view that Fig. 2 is got along the 2-2 line among Fig. 1;

Fig. 3 is the exploded perspective view of the cell cover plate that disclosed of No. 363286 bulletin Taiwan patent;

Fig. 4 is the another kind of cell cover plate stereogram of No. 363286 bulletin Taiwan patent;

Fig. 5 is the stereogram of the utility model one preferred embodiment;

Fig. 6 is the cutaway view of being got along the 6-6 line among Fig. 5; And

Fig. 7 is the making schematic diagram of the above-mentioned preferred embodiment of the utility model.

Shown in Fig. 5,6, the cell cover board component that contains safety valve of the utility model one preferred embodiment, its upper cover plate 40 is made up of top metal substrate 41, substrate substrate 42 clamping metal formings 60, the safety valve 50 of this upper cover plate 40 is at top metal substrate 41, substrate substrate 42 explosionproof hole 411,421 to be set, and relends aided metal paper tinsel 60 these explosionproof holes 411,421 of sealing and forms.

Cooperation is referring to Fig. 7, as shown in the figure, upper cover plate 40 of the present utility model is to be formed by top metal substrate 41, substrate substrate 42 clamping metal formings 60, in the present embodiment, the material of this top,

substrate substrate

41,42 can be metals such as steel disc, stainless steel substrates, copper sheet or aluminium flake, and its thickness then can be made the assembly of different thickness ratio according to Material Strength.In addition, this top metal substrate 41 and substrate substrate 42 coordinatioies have provided explosionproof hole 411,421, they combine with metal forming 60 that (material of this metal forming 60 of present embodiment can be steel foil, stainless steel foil, aluminium foil, nickel foil, metals such as dilval paper tinsel) be this top metal substrate 41 and substrate substrate 42 to be separated (as thin as a wafer earlier because of top metal substrate 41 and substrate substrate 42 thickness with separating wheel 70, so can be flexible and be subjected to separate wheel 70 delivery) by the metal of itself, and after separating, metal forming 60 delivery are gone between top metal substrate 41 and the substrate substrate 42 by heating running roller 80, should heat running roller 80 simultaneously can be to metal forming 60 appropriate heating delivery, at last, by pressing running roller 90 with top metal substrate 41, metal forming 60,42 roll bonding of substrate substrate, provide liquid injection hole 401 again, electrode hole 402, and then cut just to put according to preliminary dimension and can make upper cover plate 40, this upper cover plate 40 has by metal forming 60 sealing explosionproof holes 411,421 and the safety valve 50 formed.

When upper cover plate 40 being covered in battery (figure does not show) open end, and electrolyte is injected in the battery case via liquid injection hole 401, and when inside battery has precompressed, fill out again and seal liquid injection hole 401, then when the cell internal pressure abnormal ascending arrives the preset pressure value scope, just can break through metal forming 60 relieving pressures and then can prevent the battery explosion.

It is as described below that the utility model contains the effect and the advantage of cell cover board component of safety valve:

One; because metal forming 60 of the present utility model is to be interposed between top metal substrate 41 and the substrate substrate 42; there was upper cover plate 40 to push mutually on the production line so both made; situation such as stack; metal forming 60 obtains protection because of being positioned at top metal substrate 41 with substrate substrate 42; and then can avoid metal forming 60 breakages; distortion; scratch; can guarantee metal forming 60 just explosion when battery preset pressure value scope arrives relatively; can prevent that metal forming 60 situation with regard to explosion in battery pressure security scope from taking place; therefore, have and to prevent the meaningless inefficacy of battery and avoid cost waste and can keep the effect and the advantage of battery quality.

Two, because metal forming 60 of the present utility model and top metal substrate 41, the combination of substrate substrate 42, be by 90 roll-ins of pressing running roller between top metal substrate 41 and substrate substrate 42, pressing running roller 90 does not directly contact roll-in metal forming 60, can avoid metal forming 60 attenuation relatively, distortion, damaged, can guarantee metal forming 60 just explosion when battery preset pressure value scope arrives, and then can prevent that metal forming 60 from taking place with regard to the situation of explosion in battery pressure security scope, can prevent that the meaningless inefficacy of battery is to avoid the cost waste and can keep the effect and the advantage of battery quality thereby have.

Claims

1, anodal part, negative pole spare, electrolyte that a kind of cell cover board component that contains safety valve, this battery are included in installing in the battery case reach the upper cover plate in this battery case open end capping, it is characterized in that:

This upper cover plate is made up of top metal substrate, bottom metal substrate clip metal paper tinsel, and this top metal substrate, substrate substrate coordination have provided explosionproof hole, and between this top metal substrate, substrate substrate clamping by the metal forming of sealing explosionproof hole to form safety valve.

2, the cell cover board component that contains safety valve as claimed in claim 1, it is characterized in that: this top metal substrate, substrate substrate are steel disc, stainless steel substrates, copper sheet or aluminium flake.

3, the cell cover board component that contains safety valve as claimed in claim 1 is characterized in that: this metal forming is steel foil, stainless steel foil, aluminium foil, nickel foil or dilval paper tinsel.