CN104282853A - Sealing plate for battery and battery using sealing plate - Google Patents

Sealing plate for battery and battery using sealing plate Download PDF

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Publication number
CN104282853A
CN104282853A CN201310294945.4A CN201310294945A CN104282853A CN 104282853 A CN104282853 A CN 104282853A CN 201310294945 A CN201310294945 A CN 201310294945A CN 104282853 A CN104282853 A CN 104282853A
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CN
China
Prior art keywords
battery
hush panel
flange part
support
lid
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Granted
Application number
CN201310294945.4A
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Chinese (zh)
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CN104282853B (en
Inventor
李湘
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Panasonic Energy Wuxi Co Ltd
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Panasonic Energy Wuxi Co Ltd
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Priority to CN201310294945.4A priority Critical patent/CN104282853B/en
Publication of CN104282853A publication Critical patent/CN104282853A/en
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Publication of CN104282853B publication Critical patent/CN104282853B/en
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10Primary casings; Jackets or wrappings
    • H01M50/147Lids or covers
    • H01M50/166Lids or covers characterised by the methods of assembling casings with lids
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30Arrangements for facilitating escape of gases
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Gas Exhaust Devices For Batteries (AREA)

Abstract

The invention aims to provide a sealing plate for a battery. The sealing plate comprises an upper cover, a lower cover and a valve body, and is characterized in that the upper cover comprises a hollow convex part and a flange part arranged at the periphery of the convex part; the flange part has multiple vent holes; the lower cover comprises a cover bottom and a bending part; the bending part is combined with the peripheral edge of the flange part of the upper cover through riveting; a valve hole is formed in the center of the cover bottom; the valve body which covers the valve hole is arranged in space divided by the convex part and the cover bottom; and a supporting part for supporting the convex part is arranged between the flange part and the cover bottom.

Description

Battery hush panel and use the battery of this hush panel
Technical field
The present invention relates to a kind of battery hush panel and there is the battery of this battery hush panel.
Background technology
Battery is generally divided into physical battery and chemical cell, and chemical energy is the device of electric energy by the chemical reaction between chemical cell refers to by both positive and negative polarity.Primary cell and secondary cell is divided into according to whether reusing.Primary cell refers to the battery that cannot carry out charging, only discharging, as zinc-manganese, alkaline dry battery, and lithium button battery, the sub-battery of lithium etc.Secondary cell refers to the battery that repeatedly can carry out discharge and recharge recirculation, as plumbic acid, NI-G, ni-mh, lithium ion, lighium polymer, fuel, zinc, aluminium, magnesium air cell etc.
Along with the development of electronic product, particularly move in recent years, electric palm product universal, secondary cell (such as NI-G, ni-mh, lithium ion battery etc.) can carry out repetition discharge and recharge because of it, easy to use, capacity is high, the small and exquisite advantage and obtain fast development such as to be easy to carry.People in use also have higher requirement to these batteries, as high power capacity, and high power, high security etc.Secondary cell (for Ni-MH battery) generally comprises metal shell, seal member (hush panel, positive cover, vent valve), lead-in wire and the pole plate group be rolled into by positive plate, insulating paper and negative plate that is sealed in closed chamber that this metal shell and hush panel formed and the electrolyte infiltrated inside this pole plate group.The assembly technology of Ni-MH battery is generally such: lead-in wire one end is first welded as a whole with positive plate, reel in groups with negative plate, insulating paper by rolling step again, by inserting shell operation, group is inserted in metal-back again, operation is entered through ditch, housing forms the annulus of a circle indent to play the effect of fixing group, reinject electrolyte, then the other end that will go between welds with hush panel, forms complete battery finally by sealing process.
In order to meet the demand of people to high-capacity battery, generally take the width increasing pole plate to increase active material thus to improve the capacity of battery, but the consequence brought is exactly inside battery survival space sharply reduces.Battery is when discharge and recharge, electrolyte decomposition is made to produce gas, when gas reaches certain pressure, by the control of vent valve due to electrode and electrolyte reaction, internal pressure makes gas outwardly discharge from the steam vent bottom hush panel, thus ensure that the safety of battery.Under some specific condition, during as external short circuit, battery temperature can be made sharply to raise, and internal pressure sharply rises, if pressure can not get timely release, battery such as to be blasted at the safety issue.So, be necessary battery reach break before make the gas in battery be rapidly to battery to release outward.
So the technology being rapidly to battery as making the gas in battery and releasing outward, proposes to have and is variously provided as the schemes such as the hush panel of vent valve in the seal member of battery; The hush panel structure chart that existing cylindrical battery uses as shown in Figure 4.
Hush panel is made up of upper cover 51, lower cover 53 and the valve body between them 7.The convex shaped part 6 of upper cover 51 is in the central portion projection of upper cover 51, and as positive pole lead-out terminal, and upper cover 51 is provided with and surrounds the all-round flange part of this convex shaped part 6 substantially uniformly.The air vent 50 that diameter is about 1mm is formed at multiple positions of flange part.
The central authorities of lower cover 53 have the valve opening 9 that diameter is about 1.5mm, and this valve opening 9 is closed by valve body 7.Lower cover 53 is riveted in marginal portion with upper cover 51 and is connected.
Generally, upper cover 51 and lower cover 53 are made by the operation of the operation and nickel plating of repeatedly carrying out punch process to the steel plate of thickness about 0.3mm.The valve body 7 of rubber is the part of the rubber with cylindric or flat column.This rubber valve body 7 seals valve opening 9.When the gas produced in battery is greater than threshold value, that is, when air pressure is greater than threshold value, air pressure makes rubber valve body 7 shrink, gas is discharged from valve opening 9, enters the space that upper cover 51 surrounds with lower cover 53 and rubber valve body 7, then discharges to battery case 1 from multiple air vent 50.So, hush panel has the function that the gas of exception is discharged outside battery case 1 as vent valve.
But, in the battery use procedure of reality, the convex shaped part 6(battery positive terminal due to hush panel) easily impacted, such as dropping on the ground etc. in situation, convex shaped part 6 is hit and is out of shape, and the rubber valve body 7 that can be out of shape is forced to distortion in convex shaped part 6.Like this, when the gas produced in battery is greater than threshold value, even if air pressure is greater than threshold value, this air pressure also cannot make strained rubber valve body 7 shrink, and gas can not smooth and easyly be discharged.In this situation, battery easily explodes, and produces serious safety problem.
Or the air pressure in battery makes rubber valve body 7 shrink reluctantly, but gas is only marginally discharged to the space surrounded with lower cover 53 and rubber valve body 7 by upper cover 51, then is discharged outside battery case 1 by air vent 50.Even if like this, due to enough gas cannot be made to discharge outside battery case, fail safe and the reliability of battery also cannot be guaranteed.
Patent documentation 1: Chinese invention patent application publication number CN1363119A
Summary of the invention
The object of the present invention is to provide a kind of battery hush panel and there is the battery of this hush panel, the convex shaped part of hush panel can be prevented to be out of shape, ensure that in hush panel, valve body can not be out of shape because of external force, guarantees fail safe and the reliability of battery, thus improve the fail safe of battery.
Battery hush panel of the present invention, the convex shaped part that described upper cover has hollow and the flange part be located at around convex shaped part, described flange part has multiple air vent; Described lower cover has at the bottom of circular lid and is located at the kink of the neighboring covering the end, the neighboring of the flange part of described kink and described upper cover combines by riveting, central authorities at the bottom of described lid have valve opening, in the space divided at the bottom of by described convex shaped part and described lid, the valve body covering described valve opening is set, between at the bottom of described flange part and described lid, the support supporting described convex shaped part is set.
According to the battery of this structure, the non-deformability of convex shaped part can be improved, guarantee the fail safe of battery.
Also can be that described support is formed in the position outside the line at the center of described air vent and the center of described valve opening.Exhaust efficiency can be improved thus.
Also can be, described convex shaped part is formed as the convex of hollow by roof and cylindrical sidewall, multiple described support is formed, the distance between the length of described extension is less than at the bottom of described flange part and described lid by making multiple positions of the lower limb of described sidewall extend at the bottom of described lid.Thereby, it is possible to ensure the resistance stabilization of battery seal plate, and realize the effect of supporting convex shaped part simultaneously.
Also can be, described convex shaped part is formed as the convex of hollow by roof and cylindrical sidewall, formed by the multiple positions immediately below described sidewall and form multiple described support towards the projection at the bottom of described lid, the distance between the length of described extension is less than at the bottom of described flange part and described lid.Thereby, it is possible to ensure the resistance stabilization of battery seal plate, and realize the effect of supporting convex shaped part simultaneously.
In addition, also can be that multiple described support is by a part for the flange part be connected with described sidewall to be punctured and drop-down and formed.
Also can be that described support is formed with four.
Also can be, described support identical with the diameter of described air vent hole at the width circumferentially of described sidewall.
Also can be that the height of described support is more than or equal to the wall thickness of described flange part.
The feature of battery of the present invention is to have: with the housing of opening portion; Be inserted into the pole plate group comprising positive plate and negative plate in described housing; And the battery hush panel according to any one of claim 1-7.
Accompanying drawing explanation
Fig. 1 is the cutaway view of the battery of first embodiment of the invention.
Fig. 2 is partial sectional view and the vertical view of the battery of first embodiment of the invention.
Fig. 3 is partial sectional view and the vertical view of the battery of second embodiment of the invention.
Fig. 4 is the cutaway view of the battery of prior art.
Symbol description
1 upper cover
2 lower covers
3 valve bodies
4 battery cases
41 lead-in wires
42 seal members
5 pole plate groups
10 convex shaped parts
11 roofs
12 sidewalls
13 flange parts
14 air vents
15,151 otch
16,161 supports
The 21 lid ends
22 kinks
23 valve openings
Embodiment
Accompanying drawing 1-3 is utilized to be described the specific embodiment of the present invention below.Have employed AAA battery in present embodiment is that example is described
[the first execution mode]
Fig. 1 is the cutaway view of the battery of the first execution mode of the present invention.In Fig. 1, battery has battery case 4, be immersed in electrolyte that battery case 4 holds in pole plate group 5 and hush panel, battery case 4 and hush panel are tightly connected by seal member 42.Battery case 4 is generally cylindrical shape, but also can be the battery case of square other shapes such as grade.
Hush panel comprises upper cover 1, lower cover 2 and valve body 3.
As shown in Figure 2, upper cover 1 convex shaped part 10 with the hollow be made up of with cylindrical lateral wall 12 roof 11 and the flange part 13 that is connected with sidewall 12.Flange part 13 is formed as circular, be formed in sidewall 12 lower end all-round on.On the flange part 13 that this is circular, be separated by 90 degree and be respectively formed with an air vent 14, in present embodiment, be formed with 4 air vents 14 altogether.The convex shaped part 10 of above-mentioned hollow can use as the positive terminal of battery.
As shown in Figure 1, lower cover 2 have lid the end 21, be formed in lid the end 21 all-round on kink 22 and be formed in lid the end 21 central authorities valve opening 23.In the space formed between 21 and the convex shaped part 10 of upper cover 1 at the bottom of the lid of lower cover 2, arrange the valve body 3 of closed valve opening, valve body 3 is generally formed by rubber etc.When the gas pressure produced in battery case 4 is greater than threshold value, valve body 3 jack-up is made it distortion by air pressure, the gas produced is overflowed from valve opening 23, via the space at the bottom of the flange part 13 of upper cover 1 and the lid of lower cover 2 between 21, is released to battery case 4 from the air vent 14 of upper cover 1.Thereby, it is possible to guarantee the fail safe of battery, the blast etc. that the gas preventing battery from producing owing to discharging is not discharged in time and caused.
In addition, as shown in Figure 1, the pole plate group 5 in battery is connected with the lower cover 2 of hush panel by lead-in wire 41, thus the electric power of generation is outputted to the positive terminal (convex shaped part 10) of battery.
Below, see figures.1.and.2 detailed description present embodiment.
In Fig. 1, at the bottom of the flange part 13 of upper cover 1 and the lid of lower cover 2 between 21, define the space of gas dissipation, that is, dissipation channel.After the gas being greater than threshold value in battery case 4 makes valve body 3 be out of shape, gas is overflowed from valve opening 23, is emitted to battery case 4 from air vent 14 via this dissipation path.
But in use and transportation, battery terminal (convex shaped part 10) is subject to External Force Acting and is easily out of shape, therefore, it is possible to the valve body 3 of distortion is also forced to distortion due to the distortion of convex shaped part 10.In this situation, even if create the gas being greater than threshold value, also cannot back down the valve body 3 be out of shape, cause gas to discharge.Present embodiment, for this situation, arranges the support 16 being used for supporting above-mentioned convex shaped part 10, makes convex shaped part 10 improve non-deformability, to ensure that valve body 3 can not be out of shape because of the distortion of convex shaped part 10 in this dissipation path.
Specifically, as shown in Figure 2, on the flange part 13 of upper cover 1, near the position be connected with cylindrical lateral wall 12 of this flange part 13, four otch 15 are formed with.These four otch 15 are by puncturing flange part, and the material that punctures is drop-down after to be formed.Drop-down material extends from the lower limb of sidewall 12 and defines support 16.
Fig. 2 is only a concrete example, multiple positions of the lower limb of sidewall 12 can also be made to extend to the lid end 21 and form multiple support 16.Or, also can form above-mentioned projection by projection being welded on immediately below sidewall 12, and make this projection towards the lid end 21, form support thus.Or form projection in the part relative with sidewall 12 at the lid end 21, make this projection towards upper cover, form support thus.
And support is not limited to four, can also be two or three etc.
Here, support 16 is made to be less than the distance at flange part 13 and the lid end 21 from the length a that the lower limb of sidewall 12 extends.This is because, in the AAA battery of present embodiment, flange part 13 and the general interval 0.35mm in the lid end 21, make support 16 be less than this interval from the length that sidewall 12 extends out, this support 16 can be prevented to be electrically connected with the lid end 21, to cause the resistance of hush panel unstable.
In the present embodiment, support 16 is also made to be more than or equal to the wall thickness of upper cover from the length a that the lower limb of sidewall 12 extends.This is because in AAA battery, the wall thickness of upper cover 1 is generally 0.3mm, make support 16 be more than or equal to this wall thickness from the length that sidewall 12 extends out, this support 16 can be made more effectively to support convex shaped part 10, and easily carry out puncturing drop-down processing.
Further, the length a that support 16 preferably extends from the lower limb of sidewall 12 is more than or equal to the wall thickness of flange part 13, and the distance be less than at flange part 13 and the lid end 21, the length range of support 16 is such as more than or equal to 0.30 but is less than 0.35mm, such as, be 0.32mm.
In addition, the width b along sidewall 12 circumferencial direction of support 16 is roughly the same with the diameter of the air vent 14 on flange part 13, is more than or equal to 0.9mm in the present embodiment and is less than or equal to 1.1mm, more preferably identical with air vent 14 diameter 1.0mm.This is in order to while the supporting force for convex shaped part 10 ensureing support 16, does not affect efficiency when gas is discharged.
In the first embodiment, support 16 is formed with four, lays respectively on the line at the center of air vent 14 and the center of valve opening 23.From the gas that valve opening 23 is discharged, except discharging except battery case 4 by air vent 14, the gas fraction conflicted with support 16 is roundabout from support 16 side, also discharges battery case 4 from otch 15.Therefore, although be provided with support 16 in an exhaust gas, the discharge of gas can be had influence on, owing to being also provided with otch 15, so gas discharges effect and prior art maintains an equal level.
According to above-mentioned first execution mode, by puncturing drop-down formation support 16, this support 16 and sidewall 12 constitute the reinforcement of convex shaped part 10.The impact resistance of convex shaped part 10 can be strengthened, the situation that minimizing convex shaped part 10 is subject to external force and is out of shape, thus can ensure that valve body 3 is not out of shape because of the distortion of convex shaped part 10, can guarantee the fail safe of battery.Further, when convex shaped part 10 receives external force and is out of shape, the exhaust channel at the bottom of the flange part 13 of upper cover and the lid of lower cover 2 between 21 can be kept unimpeded by this support 16.
[the second execution mode]
Fig. 3 is partial sectional view and the vertical view of the second execution mode of the present invention.In this second embodiment, except the setting position of support, other structures are all identical with the first execution mode, there is omitted herein the explanation of same section
In second execution mode, support is not be arranged on the line at the center of air vent 14 and the center of valve opening 23, but on position outside the line being arranged on the center of air vent 14 and the center of valve opening 23.
This consideration based on the non-deformability in order to improve gas expulsion efficiency and raising convex shaped part 10 is arranged.
Specifically, as shown in Figure 3, the otch 151 on flange part 13 is arranged on is separated by the position of 45 degree with the line at the center of the center of air vent 14 and valve opening 23, but also can be separated by the position of 30 degree etc.
Like this, conflict with support 161 from the gas of valve opening 23 discharge and change path, a part flows out from the otch 151 at support 161 back side, another part flows to diagonally forward, when diagonally forward is provided with air vent 14, the gas of this another part is directly discharged from air vent 14, can improve exhaust efficiency thus.
And, arrange as the air vent 141 of through hole and otch 151 with misplacing, the impact resistance of whole upper cover 1 can be improved, compare the first execution mode, the non-deformability of convex shaped part 10 can be improved.
The invention is not restricted to the embodiment mentioned in this specification, only otherwise depart from purport of the present invention, can various distortion be carried out.

Claims (9)

1. a battery hush panel, has upper cover, lower cover and valve body, it is characterized in that,
The convex shaped part that described upper cover has hollow and the flange part be located at around convex shaped part, described flange part has multiple air vent;
Described lower cover has at the bottom of circular lid and is located at the kink of the neighboring covering the end, and the neighboring of the flange part of described kink and described upper cover combines by riveting, and the central authorities at the bottom of described lid have valve opening,
In the space divided at the bottom of by described convex shaped part and described lid, the valve body covering described valve opening is set,
Between at the bottom of described flange part and described lid, the support supporting described convex shaped part is set.
2. battery hush panel as claimed in claim 1, is characterized in that,
Described support is formed in the position outside the line at the center of described air vent and the center of described valve opening.
3. battery hush panel as claimed in claim 1 or 2, is characterized in that,
Described convex shaped part is formed as the convex of hollow by roof and cylindrical sidewall, multiple described support is formed, the distance between the length of described extension is less than at the bottom of described flange part and described lid by making multiple positions of the lower limb of described sidewall extend at the bottom of described lid.
4. battery hush panel as claimed in claim 1 or 2, is characterized in that,
Described convex shaped part is formed as the convex of hollow by roof and cylindrical sidewall, formed by the multiple positions immediately below described sidewall and form multiple described support towards the projection at the bottom of described lid, the distance between the length of described extension is less than at the bottom of described flange part and described lid.
5. battery hush panel as claimed in claim 3, is characterized in that,
Multiple described support is by a part for the flange part be connected with described sidewall to be punctured and drop-down and formed.
6. battery hush panel as claimed in claim 1 or 2, is characterized in that,
Described support is formed with four.
7. battery hush panel as claimed in claim 3, is characterized in that,
Described support identical with the diameter of described air vent hole at the width circumferentially of described sidewall.
8. battery hush panel as claimed in claim 3, is characterized in that,
The height of described support is more than or equal to the wall thickness of described flange part.
9. a battery, it has: with the housing of opening portion; Be inserted into the pole plate group comprising positive plate and negative plate in described housing; And the battery hush panel according to any one of claim 1-7.
CN201310294945.4A 2013-07-12 2013-07-12 Battery hush panel and use the battery of this hush panel Active CN104282853B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110710015A (en) * 2017-06-07 2020-01-17 株式会社村田制作所 Secondary battery, battery pack, electric vehicle, power storage system, electric power tool, and electronic device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1195202A (en) * 1997-03-31 1998-10-07 三星电管株式会社 Cap assembly of secondary batteries
JP2003068268A (en) * 2001-08-27 2003-03-07 Sanyo Electric Co Ltd Closed type storage battery
CN101572328A (en) * 2008-05-02 2009-11-04 索尼株式会社 Nonaqueous electrolyte battery
CN201352577Y (en) * 2009-01-23 2009-11-25 松下能源(无锡)有限公司 Lead wire for battery, seal plate for battery and battery
CN203445162U (en) * 2013-07-12 2014-02-19 松下能源(无锡)有限公司 Sealing plate for battery and battery using same

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1195202A (en) * 1997-03-31 1998-10-07 三星电管株式会社 Cap assembly of secondary batteries
JP2003068268A (en) * 2001-08-27 2003-03-07 Sanyo Electric Co Ltd Closed type storage battery
CN101572328A (en) * 2008-05-02 2009-11-04 索尼株式会社 Nonaqueous electrolyte battery
CN201352577Y (en) * 2009-01-23 2009-11-25 松下能源(无锡)有限公司 Lead wire for battery, seal plate for battery and battery
CN203445162U (en) * 2013-07-12 2014-02-19 松下能源(无锡)有限公司 Sealing plate for battery and battery using same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110710015A (en) * 2017-06-07 2020-01-17 株式会社村田制作所 Secondary battery, battery pack, electric vehicle, power storage system, electric power tool, and electronic device
CN110710015B (en) * 2017-06-07 2022-08-09 株式会社村田制作所 Secondary battery, battery pack, electric vehicle, power storage system, electric power tool, and electronic device

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