CN1303703C

CN1303703C - Sealing plate and staled cell

Info

Publication number: CN1303703C
Application number: CNB2004100621041A
Authority: CN
Inventors: 中泽睦; 中林宪一
Original assignee: Toshiba Lighting and Technology Corp
Current assignee: Toshiba Lighting and Technology Corp
Priority date: 2003-08-26
Filing date: 2004-07-02
Publication date: 2007-03-07
Anticipated expiration: 2024-07-02
Also published as: KR100649784B1; KR20050022269A; CN1591929A; JP2005071836A; JP3943063B2

Abstract

This sealed battery 1 is equipped with: a case 2 having an opening 2a; and this sealing plate 3 for forming a part of an outer shell along with the case 2 by closing the opening 2a. The sealing plate 3 is equipped with: a plate part 4 jointed to the case 2 in a circumferential part 4a; the valve 5 formed thinner than the thickness of the plate part 4 at a part of the plate part 4 and having curved parts 5b curved in the plate thickness direction; and a groove 6 continuously extended from the circumferential edges 5a of the valve 5 to at least one position separating the curved parts 5b.

Description

Hush panel and enclosed-type battery

Technical field

The present invention relates to have the hush panel and the enclosed-type battery of the valve that discharges container internal pressure.

Background technology

TOHKEMY 2002-367583 communique has disclosed a kind of enclosed-type battery.This enclosed-type battery is provided with valve (pressure relief valve) function on hush panel, when the pressure of internal tank is excessive, gas inside can be emitted.Valve is made of recess, bulge and groove.Recess is located on the part of hush panel, and the thickness of slab attenuate is formed.Bulge disposes 2 on the bottom surface of recess, be symmetry with the center.Groove extends near boundary vicinity (edge part) from the bottom central part of recess always, and, respectively round 2 bulges.

When the pressure in the enclosed-type battery rose and surpassed the disrumpent feelings pressure of setting, valve began disrumpent feelings from the groove that is positioned at the recess central portion in turn.Groove is disrumpent feelings towards mutual boundary vicinity in opposite directions, and like this, valve becomes open state.That is valve events.

But in the boundary portion of recess and other parts, the thickness of slab of hush panel sharply changes, and stress is concentrated easily.The thickness ratio bottom at groove place also will reduce, and is located near the edge part of the bottom surface of boundary portion.Therefore, when the impact of falling etc. when enclosed-type battery made the hush panel distortion, stress concentrated on the groove.As a result, even be lower than the internal pressure of setting operating pressure, also can make the bottom surface of recess split along groove.That is, because the impact when falling causes valve events sometimes.

For this reason, the intensity of valve must be brought up to than the operating pressure height of setting.In addition,, change along with the stress of dimensional deformation owing to affact the stress tolerance of the internal pressure on the groove, so, make the operating pressure of valve produce deviation.

Summary of the invention

The purpose of this invention is to provide the hush panel and the enclosed-type battery that have valve, this valve can precision move under the operating pressure of setting well.

Hush panel of the present invention is characterized in that, has board, valve and groove; Described board is lived the peristome of container is inaccessible, forms the shell of enclosed-type battery with described container; Described valve is formed on the part of described board, is the thickness of slab attenuate of this board is formed with fixing thickness, and has towards the bend of described thickness of slab direction bending that peripheral part begins to be connected in described board with same thickness from described bend; Described groove begins to extend from the outer peripheral edges of described valve, and arrives to described bend position spaced of major general continuously, and disposes described bend in both sides along total length.

In addition, open easily,, be provided with at least one auxiliary tank that extends towards the outer peripheral edges of valve from the end of groove in the direction of intersecting with groove in order to make valve.Perhaps, be provided with from least 2 auxiliary tanks of the end bifurcated of groove.At this moment, auxiliary tank is to extend towards outer peripheral edges from the end of groove, in the end midway of bend.Perhaps the end crosscut bend from groove extends to outer peripheral edges always.

During assembly sealing plate, in order to prevent to run into valve it is staved, valve is housed in the thickness of slab direction inboard of plate.

When becoming enclosed-type battery with the container assembling, concentrate on the inner face side of the boundary member of valve and board in order to prevent interior stress of pressing, the outer peripheral edges of valve flush continuous with the medial surface of the board that is faced with internal tank.Perhaps, continuous smoothly in the middle of the thickness of slab of the outer peripheral edges of valve and board.

Enclosed-type battery of the present invention constitutes shell by container and hush panel, and container has peristome, and hush panel is firmly inaccessible with this peristome; It is characterized in that described hush panel has board, valve and groove; The peripheral part of described board engages with described container; Described valve is formed on the part of described board, is the thickness of slab attenuate of this board is formed with fixing thickness, and has towards the bend of described thickness of slab direction bending that peripheral part begins to be connected in described board with same thickness from described bend; Described groove begins to extend from the outer peripheral edges of described valve, and arrives to described bend position spaced of major general continuously, and disposes described bend in both sides along total length.

According to hush panel of the present invention and enclosed-type battery, can be with the distortion of the bend of valve, relax the stress from the outside such as impact when falling or distortion, can suppress stress and concentrate on the groove.That is, with respect to the operating pressure of setting, the internal pressure of valve events is not in fact allowed the influence of external stresses such as the impact that is subject to fall and distortion.Therefore, the internal pressure in the time of can preventing the valve actual act produces deviation.

In addition, acting on the stress on the groove, mainly is the stress that internal pressure produces.Therefore, external stresses such as distortion needn't be considered, the intensity of groove needn't be improved.Therefore, the internal pressure during the valve actual act is little with respect to the difference of the operating pressure of setting, and can reduce the deviation of operating pressure.

Description of drawings

Fig. 1 is the stereogram of the enclosed-type battery of the present invention's the 1st example.

Fig. 2 is the sectional drawing along the F2-F2 line that is located at the valve on the hush panel shown in Fig. 1.

Fig. 3 is a plane graph of seeing valve shown in Fig. 1 from the outside of enclosed-type battery.

Fig. 4 is a plane graph of seeing valve shown in Fig. 1 from the inboard of enclosed-type battery.

Fig. 5 is the sectional drawing along the F5-F5 line that is located at the valve on the hush panel shown in Fig. 3.

Fig. 6 is expression valve shown in Figure 1 is opened the valve state under operating pressure a fragmentary perspective cross sectional view.

Fig. 7 is the enclosed-type battery of the present invention's the 2nd example, is the sectional drawing that expression is located at the valve on the hush panel.

Fig. 8 is the enclosed-type battery of the present invention's the 3rd example, is to be located at the stereogram of the valve biopsy cavity marker devices on the hush panel.

Fig. 9 A～Fig. 9 Z is that expression is located at the structure of the valve on the hush panel of the present invention and the schematic diagram of the example that auxiliary tank disposes.

Embodiment

Below, referring to figs. 1 through Fig. 6, the 1st example of the present invention is described.As shown in Figure 1, enclosed-type battery 1 has container 2 and the hush panel 3 that forms shell.As shown in Figure 2, hush panel 3 has board 4, valve 5 and groove 6.

Board 4 is provided with the step chimeric with the peristome 2a of container 2 at its peripheral part 4a.The part that the edge of peripheral part 4a and peristome 2a coincide is with seal welding W such as laser welding.As shown in Figure 1, at the central portion of board 4, clip packing ring 7 ground terminal 8 is installed.Terminal 8 connects board 4 along the thickness of slab direction, is connected with the electrode that is housed in container 2 inside.

As shown in Figure 2, valve 5 is formed on the part of board 4, and the thickness of slab attenuate of this board 4 is formed.Valve 5 is to use press-processing method, and the part of board 4 is removed, and the thickness of slab attenuate is formed.The outer peripheral edges 5a of valve 5 flushes ground continuously with the medial surface 4b of the board 4 that is faced with container 2 inside.In addition, valve 5 has towards the bend 5b of thickness of slab direction bending.At this moment, bend 5b, from outer peripheral edges 5a towards central portion after the outside curve of container 2, again at central portion toward the inside bend of container 2.Valve 5 is housed in the thickness of slab direction inboard of board 4.

To shown in Figure 5, groove 6 begins to extend from the outer peripheral edges 5a of valve 5 as Fig. 2, and continuously to bend 5b position spaced.As Fig. 2 and shown in Figure 5, the thickness of slab of the thickness ratio valve 5 at groove 6 places also will approach.In addition, in the direction of intersecting with groove 6, be provided with the auxiliary tank 9 that the outer peripheral edges 5a from the end 6a of groove 6 towards valve 5 extends.

In this example, as shown in Figure 3 and Figure 4, valve 5 is length directions, and groove 6 alongst is configured in the central portion of valve 5.Auxiliary tank 9 is divided into 2 from the end 6a of groove 6, and crosscut bend 5b extends to four jiaos of outer peripheral edges 5a of rectangle valve 5 always.

Groove 6 and auxiliary tank 9 flush with the medial surface 4b of board 4.Part beyond groove 6 and the auxiliary tank 9 is towards the outside of container 2, towards the thickness of slab direction bulging of board 4.

In the enclosed-type battery 1 of above-mentioned structure, when the internal pressure of container 2 is done the time spent, valve 5 is pushed towards container 2 outsides.Tension stress acts on groove 6 and the auxiliary tank 9.When internal pressure is higher than the operating pressure of setting, be starting point with the end 6a of groove 6, produce be full of cracks along groove 6 and auxiliary tank 9.As shown in Figure 6, valve 5 splits.That is, valve 5 moves as pressure relief valve.Because the outer peripheral edges 5a and the board 4 of valve 5 are continuous, so (action) back valve 5 does not split away off from board 4 yet splitting.

In addition, owing on valve 5, be provided with bend 5b, and be provided with the groove 6 that extends from the outer peripheral edges 5a of valve 5, bend 5b is separated, when enclosed-type battery 1 falls etc., even hush panel 3 is subjected to outside impact and distortion, because this bend 5b also is out of shape, so, can prevent that stress from concentrating on the groove 6.That is, make the internal pressure of valve 5 actions, do not allow to be subject to the impact of external action on hush panel 3 and the stress influence of distortion.

Therefore, acting on the stress on the groove 6, mainly is the stress that internal pressure causes, so, the internal pressure during actual act, little with respect to the deviation of the operating pressure of setting, that is, valve 5 can precision move under the operating pressure of setting well.In addition, needn't consider needn't improve the intensity of groove 6 from the impact and the distortion of external action on hush panel 3, so, can set the operating pressure of valve 5 lower.

Below, with reference to Fig. 7 the 2nd example of the present invention is described.For with the structure of the 1st example identical function, annotate with same tag, its explanation is omitted.As shown in Figure 7, on the part of the board 4 of hush panel 3, be provided with valve 5.The thickness of slab pars intermedia 4c of the outer peripheral edges 5a of this valve 5 and board 4 is smoothly continuous.In addition, groove 6 and auxiliary tank 9 extend from the outer peripheral edges 5a of valve 5, are arranged on the position spaced with bend 5b.Groove 6 and auxiliary tank 9 are located at inside one side that faces container 2.In addition, see the plane graph of groove 6 and auxiliary tank 9 from the outside of container, with Fig. 3 be substantially same state.

The hush panel 3 of the enclosed-type battery 1 of above-mentioned structure, the thickness of slab pars intermedia 4c of the outer peripheral edges 5a of its valve 5 and board 4 is smoothly continuous.Therefore, the tension stress that can prevent internal pressure is concentrated the border that acts on outer peripheral edges 5a and board 4.In addition, because groove 6 and auxiliary tank 9 are located at inside one side that is faced with container 2, so when internal pressure acts on the enclosed-type battery 1, valve 5 is during towards outside deflection, compression stress acts on groove 6 and the auxiliary tank 9.

Like this, even being subjected to the internal pressure of not enough operating pressure repeatedly, valve 5 during deflection, also is not easy accumulated fatigue.Therefore, during secondary cell that this hush panel 3 is used for charging repeatedly, discharge, can obtain following effect.Because valve 5 has bend 5b, so, be not subjected to the influence of the distortion of external action on the hush panel 3.Therefore, valve 5 can precision move under the operating pressure of setting well.In addition, even charge repeatedly, discharge, be subjected to the internal pressure of not enough operating pressure repeatedly, the groove 6 of valve 5 can be not tired yet.The enclosed-type battery 1 of good endurance can be provided as a result.

Below, with reference to Fig. 8 the present invention's the 3rd example is described.For with the structure of the 1st and the 2nd example identical function, annotate with same tag, its explanation is omitted.As shown in Figure 8, the outer peripheral edges 5a of valve 5 flushes ground continuously with the medial surface 4b of board 4.The shape of the valve of seeing from container 2 outsides 5 is Long Circles.Valve 5 has the bend 5b towards the outside curve of container 2, and whole protuberance becomes dome.Groove 6 extends from the outer peripheral edges 5a of valve 5, and bend 5b is located at oblong central portion separatedly.In addition, on the valve 5 of hush panel 3, do not have the such auxiliary tank of the 1st and the 2nd example.

The enclosed-type battery 1 of this structure, even apply impact or distortion from the outside to hush panel 3, the distortional stress that also can be bent the 5b of portion relaxes.Therefore, can prevent that stress from concentrating on the groove 6.Acting on the stress on the valve 5, be not subjected to the outside to be applied to the impact on the hush panel 3 or the influence of distortion, mainly is the stress that internal pressure causes.As a result, the actual internal pressure of valve 5 actions that makes is little with respect to the deviation of the operating pressure of setting.That is, valve 5 can precision move under the operating pressure of setting well.In addition, the impact on the hush panel 3 or the influence of distortion needn't be considered to be applied to, the intensity of groove 6 needn't be improved from the outside.Therefore, can set the internal pressure that makes valve 5 actions lowlyer.

In addition, be located at the groove 6 on the valve 5 of hush panel 3 of the present invention and enclosed-type battery 1,, and bend 5b separated get final product as long as extend from the outer peripheral edges 5a of valve 5.In addition, also auxiliary tank 9 can be set as following.In the direction of intersecting with groove 6, at least one auxiliary tank 9 that the outer peripheral edges 5a from the end 6a of groove 6 towards valve 5 extends is set.Perhaps, as the 1st example, have from least 2 auxiliary tanks of the end 6a branch of groove 6.At this moment, auxiliary tank 9 can extend by the outer peripheral edges 5a from the end 6a of groove 6 towards valve 5, in the end midway of bend 5b; Also can extend to outer peripheral edges 5a from the end 6a crosscut bend 5b of groove 6 always.

Fig. 9 A～Fig. 9 Z schematically illustrates the various collocation forms of groove 6 and auxiliary tank 9 taxonomically.Among each figure, the line of most peripheral is represented the border of board 4 and valve 5.In addition, the scope of representing with hacures is bend 5b.

Valve 5 shown in Fig. 9 A～Fig. 9 J is Long Circles.Fig. 9 K～Fig. 9 T, and Fig. 9 Z shown in valve 5, be rectangle.Valve 5 shown in Fig. 9 U and Fig. 9 V is circular.Valve 5 shown in Fig. 9 W～Fig. 9 Y is squares.

In the valve 5 shown in Fig. 9 A～Fig. 9 E, Fig. 9 K～Fig. 9 O and Fig. 9 U, auxiliary tank 9 crosscut bend 5b.In the valve 5 shown in Fig. 9 F～Fig. 9 J, Fig. 9 P～Fig. 9 T and Fig. 9 Y, the end of auxiliary tank 9 is in the end midway of bend 5b.Valve 5 shown in Fig. 9 V extends 2 auxiliary tanks 9 from a 6a of square end portion of a

groove

6, and 5b does not intersect with bend.Valve 5 shown in Fig. 9 W, Fig. 9 X, Fig. 9 Z does not have auxiliary tank 9.

In the valve 5 shown in Fig. 9 A, Fig. 9 C～Fig. 9 F, Fig. 9 H～Fig. 9 K, Fig. 9 M～Fig. 9 P and Fig. 9 R～Fig. 9 T, extend 2 auxiliary tanks 9 respectively from the both ends 6a of groove 6.In the valve 5 shown in Fig. 9 B, Fig. 9 G, Fig. 9 L, Fig. 9 Q, Fig. 9 U, the figure Y, extend an auxiliary tank 9 respectively from the both ends 6a of groove 6.

In the valve 5 shown in Fig. 9 A, Fig. 9 B, Fig. 9 E, Fig. 9 F, Fig. 9 G, Fig. 9 J, Fig. 9 K, Fig. 9 L, Fig. 9 O, Fig. 9 P, Fig. 9 Q, Fig. 9 T, Fig. 9 U, Fig. 9 V and Fig. 9 Y, auxiliary tank 9 forms linearity.In the valve 5 shown in Fig. 9 C, Fig. 9 D, Fig. 9 H, Fig. 9 I, Fig. 9 M, Fig. 9 N, Fig. 9 R, Fig. 9 S, auxiliary tank 9 forms circular arc.In the valve 5 shown in Fig. 9 E, Fig. 9 J, Fig. 9 O, Fig. 9 T, auxiliary tank 9 with respect to groove 6 orthogonals disposing.

Claims

1. hush panel (3) is characterized in that, has board (4), valve (5) and groove (6);

Described board (4) is lived the peristome (2a) of container (2) is inaccessible, forms the shell of enclosed-type battery (1) with described container (2);

Described valve (5) is formed on the part of described board (4), be that the thickness of slab attenuate of this board (4) is formed with fixing thickness, and have the bend (5b) towards the bending of described thickness of slab direction, outer peripheral edges (5a) are connected in described board (4) from described bend (5b) beginning with same thickness;

Described groove (6) begins to extend from the outer peripheral edges (5a) of described valve (5), and arrives to a described bend of major general (5b) position spaced continuously, and disposes described bend (5b) in both sides along total length.

2. hush panel as claimed in claim 1 (3) is characterized in that, in the direction of intersecting with described groove (6), has at least one auxiliary tank (9) that extends towards the outer peripheral edges (5a) of described valve (5) from the end (6a) of described groove (6).

3. hush panel as claimed in claim 1 (3) is characterized in that, has from least 2 auxiliary tanks (9) of end (6a) branch of described groove (6).

4. as claim 2 or 3 described hush panel (3), it is characterized in that described auxiliary tank (9) extends towards described outer peripheral edges (5a) from the end (6a) of described groove (6), in the end midway of described bend (5b).

5. as claim 2 or 3 described hush panel (3), it is characterized in that described auxiliary tank (9) extends to described outer peripheral edges (5a) from the described bend of end (6a) crosscut (5b) of described groove (6) always.

6. hush panel as claimed in claim 1 (3) is characterized in that, described valve (5) is housed in the thickness of slab direction inboard of described board (4).

7. hush panel as claimed in claim 1 (3) is characterized in that, the outer peripheral edges (5a) of described valve (5) flush ground continuously from the medial surface (4b) that faces the inner described board (4) of described container (2).

8. hush panel as claimed in claim 1 (3) is characterized in that, the outer peripheral edges (5a) of described valve (5) are smoothly continuous with the thickness of slab pars intermedia of described board (4).

9. enclosed-type battery (1) constitutes shell by container (2) and hush panel (3), and container (2) has peristome (2a), and hush panel (3) is firmly inaccessible with this peristome (2a); It is characterized in that described hush panel (3) has board (4), valve (5) and groove (6);

The outer peripheral edges (4a) of described board (4) engage with described container (2);

10. hush panel as claimed in claim 9 (3) is characterized in that, in the direction of intersecting with described groove (6), has at least one auxiliary tank (9) that extends towards the outer peripheral edges (5a) of described valve (5) from the end (6a) of described groove (6).