CN201259900Y

CN201259900Y - Accumulator safety cap

Info

Publication number: CN201259900Y
Application number: CNU200820147313XU
Authority: CN
Inventors: 杨醒超
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-09-05
Filing date: 2008-09-05
Publication date: 2009-06-17
Anticipated expiration: 2018-09-05

Abstract

The utility model relates to a battery safe nut cap, comprising a nut cap body, a circular ring, a metal sheet and a peripheral O-ring seal; the circular ring is fixed below the inner side of the top part of the nut cap body; an exhaust passage is arranged on the nut cap body, and the opening at the inner end of the exhaust passage is opposite to a middle pore of the circular ring, and the opening at the external end of the exhaust passage is toward to outside of the nut cap body; the metal sheet is fixedly connected with the bottom surface of the nut cap body; a vent hole for communicating the opening of the circular ring and the inner part of the battery is arranged on the metal sheet; a aluminum foil is arranged between the nut cap body and the circular ring and is sealed by the exhaust passage formed by the vent hole of the metal sheet, a middle pore of the circular ring and the exhaust passage of the nut cap body; the periphery of the nut cap body is arranged in a groove of the peripheral O-ring seal. The battery safe nut cap has very stable function of explosion prevention and good safety.

Description

The cell safety block

Technical field

The utility model relates to a kind of cell safety block.

Background technology

At present both at home and abroad no matter the cylindrical battery block is the block of lithium ion battery or ni-mh, nickel-cadmium cell, adopt spring leaf of assembly connection or ball by structural member pressurization back sealing pore always, when cell internal pressure acquires a certain degree, rely on self elasticity of spring leaf or ball, get rid of the gas of inside battery.Because ball is worked under the electrolyte environment for a long time, be subjected to Temperature Influence also bigger simultaneously, be easy to cause ball to lose efficacy, thereby can not reach the purpose of exhaust on the one hand, there is actual potential safety hazard, reach pressure too early on the other hand and open and extraneous passage, finally do not have the effect of sealing and lost efficacy.And for the block of spring thin slice, spring leaf is fixed on the coupling assembling, be fixed on the block one side course of processing complexity, technology trouble then, production efficiency is low, on the other hand, the syndeton that it is complicated, the course of processing cause the consistency of each block poor, spring leaf is in stress state for a long time simultaneously, is easy to lose the sensitivity to the gas pressure induction.

Summary of the invention

The purpose of this utility model is the problems referred to above at existing battery cap existence, provides a kind of explosion-proof performance stable cell safety block.

The purpose of this utility model is achieved in that the utility model comprises the block main body, annulus, sheet metal and peripheral seal cushion rubber, described annulus is fixed on the inside top below of block main body, on described block main body, be provided with exhaust duct, the interior end opening of exhaust duct is facing to the mesopore of annulus, the outer end opening of exhaust passage leads to outside the block main body, described sheet metal is fixedlyed connected with the bottom surface of block main body, on sheet metal, be provided with the air vent hole that is communicated with annulus perforate and inside battery, between block main body and annulus, be provided with aluminium foil, aluminium foil will be by the air vent hole of sheet metal, the mesopore of annulus, the formed exhaust passage of exhaust duct of block main body closes, and the periphery of described block main body is positioned at the groove of peripheral seal cushion rubber.

Operation principle of the present utility model is: the effect of aluminium foil is to prevent that battery from blasting, because of it is the thinest part of entire cell, when over-charging of battery or improper use and other factors all might cause inside battery heating air pressure to increase, before inside battery air pressure exceeds the pressure that this battery case can bear, the air pressure of inside battery is at first worn the aluminium foil top, gas is discharged rapidly through the exhaust passage, so battery can not blasted.

Technique effect of the present utility model is: the utility model adopts the closing membrane (rupture pressure disc) of aluminium foil as the battery exhaust passage, because aluminium foil has very homogeneous thickness, and can select to determine the thickness of aluminium foil according to the air pressure that all size size battery can bear, so the utility model has very stable explosion prevention function and good fail safe.

Description of drawings

Fig. 1 is the structural representation of embodiment one.

Fig. 2 is the structural representation of embodiment two.

Embodiment

As shown in Figure 1, embodiment one comprises block main body 1, annulus 3, sheet metal 4 and peripheral seal cushion rubber 5, the periphery of block main body 1 is positioned at the groove of peripheral seal cushion rubber 5, peripheral seal cushion rubber 5 will bond together with the shell of battery when block is assembled with inside battery, annulus 3 usefulness viscose glues are fixed on the inside top below of block main body 1, on block main body 1, be provided with exhaust duct, exhaust duct is formed by connecting by perforate 101 that is located at block main body 1 inside top and the steam vent 102 that is located on block main body 1 sidepiece, this perforate 101 is facing to the mesopore 301 of annulus 3, the outer end opening of steam vent 102 leads to outside the block main body 1, the end face of sheet metal 4 welds together with the bottom surface of block main body 1, fixedly connected with the anodal of battery in the future in the bottom surface of sheet metal 4, on sheet metal 4, be provided with air vent hole 401, air vent hole 401 is communicated with the mesopore 301 of annulus 3 with inside battery, like this from the air vent hole 401 of sheet metal 4 exhaust duct through annulus mesopore 301 and block main body 1, just formed the exhaust passage of block, but between block main body 1 and annulus 3, be provided with aluminium foil 2, aluminium foil 2 links together by viscose glue and block main body 1, aluminium foil 2 closes the exhaust passage of block, and before inside battery air pressure exceeds the pressure that battery case can bear, the air pressure of inside battery will at first be worn aluminium foil 2 tops, gas is discharged rapidly through the exhaust passage of block, so battery can not blasted.The position of the air vent hole 401 among the embodiment one on the sheet metal 4 does not face toward the mesopore 301 of annulus 3; be in order to protect aluminium foil 2 to prevent that it from being damaged by the impurity of inside battery and lost efficacy, thereby between sheet metal 4 and annulus 3, be provided with the space and be communicated with the air vent hole 401 on the sheet metal 4 and the mesopore 301 of annulus 3.It also is same reason that steam vent 102 on the block main body 1 is located at its sidepiece.

As shown in Figure 2, embodiment two is with embodiment one difference: the block main body among the embodiment two is made up of shell 62 and inner casing 61 two parts, and the periphery of shell 62 and inner casing 61 is stacked and placed on up and down in the groove of peripheral seal cushion rubber 8; The exhaust duct of block main body is to be provided with like this, it is provided with steam vent 621 on shell 62, be provided with the mesopore 701 of perforate 611 facing to annulus 7 at the top of inner casing 61, be provided with the cavity that is communicated with shell steam vent 621 and inner casing perforate 611 between shell 62 and inner casing 61, shell steam vent 621, cavity and inner casing perforate 611 have just constituted the exhaust duct of block main body; Annulus 7 usefulness viscose glues are fixed on the inside top below of inner casing 61, and the bottom surface of the end face of sheet metal 9 and inner casing 61 welds together.All the other structures of embodiment two repeat no more with embodiment one.

Annulus can adopt variety of way to be fixed in the block main body, for example in the utility model: annulus is fixed with block main body interference fit; Thereby being provided with salient point at the end face of sheet metal holds out against annulus fixing.

Claims

1. a cell safety is blocked a shot, it is characterized in that: comprise the block main body, annulus, sheet metal and peripheral seal cushion rubber, described annulus is fixed on the inside top below of block main body, on described block main body, be provided with exhaust duct, the interior end opening of exhaust duct is facing to the mesopore of annulus, the outer end opening of exhaust passage leads to outside the block main body, described sheet metal is fixedlyed connected with the bottom surface of block main body, on sheet metal, be provided with the air vent hole that is communicated with annulus perforate and inside battery, between block main body and annulus, be provided with aluminium foil, aluminium foil will be by the air vent hole of sheet metal, the mesopore of annulus, the formed exhaust passage of exhaust duct of block main body closes, and the periphery of described block main body is positioned at the groove of peripheral seal cushion rubber.

2. cell safety block according to claim 1, it is characterized in that: described block main body is made up of shell and inner casing, on shell, be provided with steam vent, be provided with perforate facing to the annulus mesopore at the top of inner casing, between shell and inner casing, be provided with the cavity that is communicated with shell steam vent and inner casing perforate, shell steam vent, cavity and inner casing perforate constitute exhaust duct, and the periphery of shell and inner casing is stacked and placed on up and down in the groove of peripheral seal cushion rubber.

3. cell safety block according to claim 2, it is characterized in that: the steam vent on the described shell is located on the sidepiece of shell.

4. according to claim 1 or 2 or 3 described cell safety blocks, it is characterized in that: the air vent hole position on the described sheet metal facing to the mesopore of annulus, is not provided with the space between sheet metal and annulus.

5. according to claim 1 or 2 or 3 described cell safety blocks, it is characterized in that: described aluminium foil is sealedly connected on the block main body with viscose glue.