JP2000260421A - Pressure sensitive circuit breaking mechanism of battery - Google Patents
Pressure sensitive circuit breaking mechanism of batteryInfo
- Publication number
- JP2000260421A JP2000260421A JP11057151A JP5715199A JP2000260421A JP 2000260421 A JP2000260421 A JP 2000260421A JP 11057151 A JP11057151 A JP 11057151A JP 5715199 A JP5715199 A JP 5715199A JP 2000260421 A JP2000260421 A JP 2000260421A
- Authority
- JP
- Japan
- Prior art keywords
- battery
- internal terminal
- diaphragm
- lead
- joint
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は感圧電路遮断機構に
係わり、電池ケースの内部の圧力が上昇したときに安全
性を確保するために用いられる電池の感圧電路遮断機構
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a piezo-electric path blocking mechanism, and more particularly to a piezo-electric path blocking mechanism for a battery used to secure safety when pressure inside a battery case increases.
【０００２】[0002]
【従来の技術】従来、例えば電池ケースの内部に有機溶
媒系電解液を注入して密閉した、充電可能なリチウムイ
オン二次電池などが、携帯電話機やパソコン等の携帯用
機器の電源として広く使用されている。ところが、この
ような電池に再充電するときに過充電を行ったり、規定
された電流よりも大きな電流で充電を行ったりすると、
電池に異常が生じて電池ケース内に気体が発生し、電池
ケース内の圧力や温度が上昇して、電池ケースの膨張、
さらには亀裂等が発生し、内部の電解液が外部ににじみ
出して、電池が組み込まれた機器に悪影響を与えること
があった。また、これに至らなくてとも、前述したよう
な異常状態のままで、電池の使用を継続すると、電池の
膨張が進行し、電池ケースが破裂したりする危険性があ
り、異常が生じた電池は速やかに使用を中止する必要が
あった。2. Description of the Related Art Conventionally, a rechargeable lithium-ion secondary battery, for example, in which an organic solvent-based electrolyte is injected into a battery case and hermetically sealed, has been widely used as a power source for portable devices such as mobile phones and personal computers. Have been. However, if such a battery is overcharged when recharged, or charged with a current larger than the specified current,
Abnormality occurs in the battery, gas is generated in the battery case, and the pressure and temperature in the battery case rise, causing the battery case to expand and expand.
In addition, cracks and the like may occur, and the internal electrolyte may ooze out to adversely affect equipment in which the battery is incorporated. Also, even if this does not occur, if the use of the battery is continued in the abnormal state as described above, the battery may expand and the battery case may be ruptured. Had to be discontinued immediately.
【０００３】そのために、従来の電池の感圧電路遮断機
構を、例えば図１０、１１に示すような円形の電池で説
明すると、電池ケース１にガスケット２を介して、周囲
をカシメ等で電池ケース１と絶縁されて電池蓋３が取り
付けられている。この電池蓋３の下部には、電池蓋３と
別体のアクチュエータ４が取り付けられており、このア
クチュエータ４は、電池ケース１の内部を気密に遮蔽す
ると共に、上方に変位可能に取り付けられている。前記
電池蓋３には通気口３ａが形成され、電池ケース１内部
の圧力上昇によりアクチュエータ４が開裂すると、内部
の圧力上昇した気体が通気口３ａから外部に逃げられる
ようになっている。[0003] For this purpose, a conventional battery-sensitive piezoelectric path blocking mechanism will be described with a circular battery as shown in FIGS. 10 and 11, for example. 1 is insulated from the battery cover 3. An actuator 4 separate from the battery cover 3 is attached to a lower portion of the battery cover 3. The actuator 4 hermetically shields the inside of the battery case 1 and is attached to be displaceable upward. . A vent 3a is formed in the battery lid 3, and when the actuator 4 is ruptured due to a rise in the pressure inside the battery case 1, the gas whose pressure inside rises escapes from the vent 3a to the outside.
【０００４】また、アクチュエータ４は、円環状の安全
弁部４ａが絞り加工等で形成され、この安全弁部４ａに
は、中央部に図示下方に突出する突起部４ｂと、この突
起部４ｂの周囲の下面に放射状の溝４ｃが形成されてい
る。この溝４ｃが形成された部分のアクチュエータ４は
薄肉になっており、電池ケース１内部の圧力上昇により
アクチュエータ４が開裂可能になっている。また、アク
チュエータ４の下方には絶縁板５が配設され、この絶縁
板５には安全弁部４ａの突起部４ａが挿通する穴５ａ
と、他に通気穴５ｂとが貫通形成されている。前記絶縁
板５の下部には、リード固定部材６が埋設されて取り付
けられ、このリード固定部材６には、絶縁板５の穴５ａ
に連通する穴６ａと、絶縁板５の通気穴５ｂと連通する
通気穴６ｂとがそれぞれ設けられている。In the actuator 4, an annular safety valve portion 4a is formed by drawing or the like. The safety valve portion 4a has a projection 4b projecting downward in the center of the safety valve portion 4a, and a projection portion 4b surrounding the projection 4b. A radial groove 4c is formed on the lower surface. The portion of the actuator 4 where the groove 4c is formed is thin, and the actuator 4 can be split by a rise in the pressure inside the battery case 1. An insulating plate 5 is provided below the actuator 4, and the insulating plate 5 has a hole 5a through which the protrusion 4a of the safety valve 4a is inserted.
And a ventilation hole 5b are formed therethrough. A lead fixing member 6 is buried and attached to a lower portion of the insulating plate 5, and a hole 5a of the insulating plate 5 is provided in the lead fixing member 6.
And a ventilation hole 6b communicating with the ventilation hole 5b of the insulating plate 5 are provided respectively.
【０００５】前記リード固定部材６の下部には、薄板の
金属板から成るリード７が接着等で取り付けられてい
る。また、絶縁板５とリード固定部材６との穴５ａ、６
ａには、アクチュエータ４の突起部４ｂが挿通され、こ
の突起部４ｂの先端にリード７が取り付けられている。
この薄板のリード７は、突起部４ｂの先端部にスポット
溶接等で接合される接合部７ａを有し、アクチュエータ
４とリード７とが電気的に導通している。また、リード
７の他端は図示下方の発電素子８に接続されて、発電素
子８と電池蓋３との間に電路が形成されている。そし
て、電池内部の異常で電池ケース１内部の圧力が上昇し
た場合、圧力上昇した気体が通気穴５ｂ、６ｂから、図
１１に示す矢印Ａのように流れて、安全弁部４ａの裏面
を上方に押し上げようとする力が加えられる。A lead 7 made of a thin metal plate is attached to the lower part of the lead fixing member 6 by bonding or the like. Also, holes 5a and 6 between the insulating plate 5 and the lead fixing member 6 are formed.
The projection 4b of the actuator 4 is inserted into the section a, and the lead 7 is attached to the tip of the projection 4b.
The thin lead 7 has a joint 7a joined to the tip of the projection 4b by spot welding or the like, and the actuator 4 and the lead 7 are electrically connected. The other end of the lead 7 is connected to a power generating element 8 below the drawing, and an electric path is formed between the power generating element 8 and the battery lid 3. When the pressure inside the battery case 1 rises due to an abnormality inside the battery, the gas whose pressure has risen flows from the ventilation holes 5b, 6b as shown by the arrow A in FIG. 11, and the back surface of the safety valve portion 4a is directed upward. A pushing force is applied.
【０００６】この力で、リード７の接合部７ａに集中応
力が働き、接合部７ａが破断され、安全弁部４ａが上方
に変位して、リード７とアクチュエータ４との電気的接
続が遮断され、電池の電路が遮断されるようになってい
る。この電路遮断で、電池ケース１内部の圧力上昇が抑
えることができる。また、もしも、前記電路が遮断され
ても、電池内部の圧力上昇がストップしなで更に内圧が
上昇した場合には、更に上昇した電池内圧が安全弁部４
ａに形成された放射状の溝４ｃに加わり、この溝４ｃに
よって薄肉に形成されたアクチュエータ４が開裂され、
この開裂部分から内部の圧力上昇した気体が、通気口３
ａから外部に逃げて、電池の破裂を事前に防ぐことがで
きるようになっている。By this force, concentrated stress acts on the joint 7a of the lead 7, the joint 7a is broken, the safety valve 4a is displaced upward, and the electrical connection between the lead 7 and the actuator 4 is cut off. The electric circuit of the battery is cut off. The interruption of the electric circuit can suppress an increase in the pressure inside the battery case 1. If the internal pressure further increases without stopping the internal pressure of the battery even if the electric circuit is cut off, the further increased internal pressure of the battery is applied to the safety valve section 4.
a, the thin actuator 4 formed by the groove 4c is cleaved by the groove 4c.
The gas whose internal pressure has risen from this cleaved portion is
It is possible to escape from a to the outside and prevent the explosion of the battery in advance.
【０００７】[0007]
【発明が解決しようとする課題】しかし、前述したよう
な従来の電池の感圧電路遮断機構は、電池の内圧上昇が
低圧の場合でも、アクチュエータ４を支障なく、且つ迅
速に作動させようとすると、アクチュエータ４の形状を
大きくしなければならなかった。そのために、従来の感
圧電路遮断機構の小型化が難しかった。また、従来の電
池の感圧電路遮断機構は、電池蓋３と別体にアクチュエ
ータ４を配置し、このアクチュエータ４の下部に、絶縁
体５とリード取付部剤６とを介して薄板のリード７を取
り付けていたので、部品点数が多くなり、組立効率が悪
かった。本発明は、前述のような課題を解決して、小型
化が容易であると共に、部品点数が少なくて組立工率の
良い電池の感圧電路遮断機構を提供することを目的とす
る。However, the above-mentioned conventional piezoelectric-sensing path breaking mechanism for a battery requires that the actuator 4 be operated promptly without any trouble even when the internal pressure of the battery is low. However, the shape of the actuator 4 must be increased. Therefore, it has been difficult to reduce the size of the conventional piezoelectric path blocking mechanism. Further, in the conventional battery-related piezoelectric path interrupting mechanism, an actuator 4 is disposed separately from the battery lid 3, and a thin lead 7 is provided below the actuator 4 via an insulator 5 and a lead mounting member 6. , The number of parts increased, and the assembly efficiency was poor. SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems and to provide a piezoelectric-sensitive path interrupting mechanism for a battery which can be easily miniaturized, has a small number of parts, and has a high assembly efficiency.
【０００８】[0008]
【課題を解決するための手段】上記課題を解決するため
の第１の解決手段として本発明の電池の感圧電路遮断機
構は、発電素子を内部に収納した電池ケースと、この電
池ケースの内部を気密に遮蔽する電池蓋と、この電池蓋
の一部に前記電池ケースの内方に向けて膨出形成したダ
イアフラム部と、前記発電素子に接続され、前記ダイア
フラム部の中央部付近に接合するためのリード部に設け
られた接合部を有する内部端子とを備え、前記接合部の
両側に形成した絶縁膜を介して、前記内部端子が前記電
池蓋に取り付けられ、前記接合部と前記ダイアフラム部
とを接合して、前記電池蓋と前記発電素子との間に電路
を形成し、前記電池ケースの内圧が所定値以上に上昇す
ると、前記ダイアフラム部が、前記内部端子の前記接合
部を破断、あるいは前記接合部から剥離して変位し、前
記電路を遮断するような構成とした。According to a first aspect of the present invention, there is provided a piezoelectric sensitive circuit breaking mechanism for a battery according to the present invention, comprising: a battery case accommodating a power generating element therein; A battery cover that hermetically shields the battery, a diaphragm portion that is formed in a part of the battery cover and bulges toward the inside of the battery case, and is connected to the power generating element and is joined near a center portion of the diaphragm portion. And an internal terminal having a joint provided on a lead portion for connecting the internal terminal to the battery lid via insulating films formed on both sides of the joint. To form an electrical path between the battery lid and the power generating element, and when the internal pressure of the battery case rises to a predetermined value or more, the diaphragm portion breaks the junction of the internal terminal, There Displaced detached from the joint, has a structure that blocks the path.
【０００９】また、上記課題を解決するための第２の解
決手段として、前記絶縁膜は、前記内部端子の前記リー
ド部側に形成した構成とした。As a second means for solving the above-mentioned problems, the insulating film is formed on the side of the lead portion of the internal terminal.
【００１０】また、上記課題を解決するための第３の解
決手段として、前記絶縁膜は、前記リード部が対向する
位置の前記電池蓋側に形成した構成とした。As a third means for solving the above problem, the insulating film is formed on a side of the battery lid at a position where the lead portion faces.
【００１１】また、上記課題を解決するための第４の解
決手段として、前記内部端子は、前記リード部に破断容
易な薄肉部を形成した構成とした。As a fourth solution for solving the above-mentioned problem, the internal terminal has a structure in which a thin portion which is easily broken is formed on the lead portion.
【００１２】[0012]
【発明の実施の形態】以下に、本発明の電池の感圧電路
遮断機構の実施の形態について図面を用いて説明する。
まず、図１は本発明の上面図であり、図２は図１の２−
２断面図であり、図３は本発明の下面図であり、図４は
本発明の要部断面側面図であり、図５は本発明の要部拡
大断面図であり、図６は本発明に係わる内部端子の斜視
図であり、図７は本発明に係わる内部端子の変形例を示
す斜視図であり、図８は本発明のその他の実施の形態の
要部拡大断面図である。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a battery according to an embodiment of the present invention.
First, FIG. 1 is a top view of the present invention, and FIG.
2 is a sectional view, FIG. 3 is a bottom view of the present invention, FIG. 4 is a sectional side view of a main part of the present invention, FIG. 5 is an enlarged sectional view of a main part of the present invention, and FIG. FIG. 7 is a perspective view showing a modification of the internal terminal according to the present invention, and FIG. 8 is an enlarged sectional view of a main part of another embodiment of the present invention.
【００１３】本発明の電池の感圧電路遮断機構Ｔを、例
えば角形電池に用いたもので、図１〜図５に基づいて説
明すると、発電素子（図示せず）を内部に収納した電池
ケースＫの内部を気密に遮蔽する電池蓋１１が配設され
ている。この電池蓋１１は、ステンレス材のような導電
性金属板から成り、外形が略矩形に形成され、外周部に
鍔部１１ａと、この鍔部１１ａの内側を絞り加工等で下
方に突出させた平坦状の底板１１ｂとが形成されてい
る。前記電池蓋１１には、例えば図２に示す底板１１ｂ
の右側にダイアフラム部Ｄと、左側に安全弁部Ｚとが形
成されている。FIG. 1 is a plan view of a battery case according to the present invention, in which a piezoelectric path breaking mechanism T of a battery is used, for example, in a rectangular battery. A battery lid 11 for hermetically shielding the inside of K is provided. The battery lid 11 is made of a conductive metal plate such as a stainless steel material, has a substantially rectangular outer shape, and has a flange 11a on an outer peripheral portion and an inner side of the flange 11a protruding downward by drawing or the like. A flat bottom plate 11b is formed. For example, a bottom plate 11b shown in FIG.
Is formed with a diaphragm portion D on the right side and a safety valve portion Z on the left side.
【００１４】前記ダイアフラム部Ｄは、図５に示すよう
に、底板１１ｂの下面側から研削加工等により形成され
た円環状の凹部１１ｃにより薄肉部１１ｄが設けられて
いる。この薄肉部１１ｄがプレス等で椀状に電池ケース
Ｋの図示下方の内方に向けて膨出形成され、この薄肉部
１１ｄの中央部に、周囲の薄肉部１１ｄより厚肉にした
厚肉部１１ｅが形成されている。そして、ダイアフラム
部Ｄは、下方に膨出形成した薄肉部１１ｄの根元部分を
支点として、厚肉部１１ｅが上方に変位可能になってい
る。また、安全弁部Ｚは、図２に示すように、外形が円
環状に突き出し加工等で上方に突出形成された平坦状で
厚肉の突出部１１ｆと、この突出部１１ｆの根元部分が
薄肉に形成された連結部１１ｇとから成っている。ま
た、底板１１ｂの中央部には、後述する絶縁ワッシャ１
３を挿通するための中央孔１１ｈが形成されている。As shown in FIG. 5, the diaphragm portion D has a thin portion 11d formed by an annular concave portion 11c formed by grinding or the like from the lower surface side of the bottom plate 11b. The thin portion 11d is formed into a bowl shape by pressing or the like and bulges inward in the lower part of the battery case K in the figure, and a thick portion formed at the center of the thin portion 11d to be thicker than the surrounding thin portion 11d. 11e is formed. The diaphragm portion D is configured such that the thick portion 11e can be displaced upward with the base portion of the thin portion 11d bulging downwardly formed as a fulcrum. As shown in FIG. 2, the safety valve portion Z has a flat, thick-walled protruding portion 11f whose outer shape is formed to protrude upward by an annular protruding process or the like, and a root portion of the protruding portion 11f is thin. 11g formed. An insulating washer 1 described later is provided at the center of the bottom plate 11b.
A central hole 11h for inserting the third hole 3 is formed.
【００１５】また、電池蓋１１の底板１１ｂ上には、合
成樹脂等の絶縁材料から成る外形が略矩形の保持部材１
２が配設され、この保持部材１２は、中央部に後述する
絶縁ワッシャ１３を挿通するための中央孔１２ａが形成
されている。また、ダイアフラム部Ｄの上方の保持部材
１２には、ダイアフラム部Ｄが上方に変位したときの逃
げ部として第１凹部１２ｂが形成され、この第１凹部１
２ｂが、所定の大きさの第１通気口１２ｃで外部と連通
している。また、安全弁部Ｚの上方の保持部材１２に
は、突出部１１ｆが位置する部分に第２凹部１２ｄが形
成され、この第２凹部１２ｄが第２通気口１２ｅで外部
と連通している。On the bottom plate 11b of the battery cover 11, a holding member 1 made of an insulating material such as synthetic resin and having a substantially rectangular outer shape is provided.
The holding member 12 has a central hole 12a formed at the center thereof for inserting an insulating washer 13 to be described later. The holding member 12 above the diaphragm D is formed with a first recess 12b as an escape portion when the diaphragm D is displaced upward.
2b communicates with the outside through a first vent 12c of a predetermined size. The holding member 12 above the safety valve portion Z is provided with a second concave portion 12d at a portion where the protruding portion 11f is located, and the second concave portion 12d communicates with the outside through a second vent 12e.
【００１６】前記電池蓋１１の中央孔１１ｈと保持部材
１２の中央孔１２ａとには、鍔部１３ａを有する筒状の
絶縁ワッシャ１３が挿入されている。この絶縁ワッシャ
１３には、利部と１４が挿通され、このリベット１４
は、鍔部１３ａを挟んで、電池蓋１１と絶縁されてい
る。前記リベット１４は、アルミ等から成り、下方に円
形の頭部１４ａと、絶縁ワッシャ１３から上方に突出す
る先端部１４ｂとが形成されている。前記絶縁ワッシャ
１３の鍔部１３ａと、リベット１４の頭部１４ａとの間
には、略Ｌ字状に折り曲げられた正極端子１５が狭持さ
れている。また、保持部材１２の中央孔１２ａ周辺が彫
り込み形成され、この彫り込み部分には、金属板から成
る椀状の導通ワッシャ１６が取り付けられている。そし
て、絶縁ワッシャ１３に挿入されたリベット１４の先端
部１４ｂが、カシメ等によりつぶされて、リベット１４
と導通ワッシャ１６とが電気的に導通している。A cylindrical insulating washer 13 having a flange 13a is inserted into the central hole 11h of the battery lid 11 and the central hole 12a of the holding member 12. The insulated washer 13 is inserted with the rivet 14 and the rivet 14.
Is insulated from the battery cover 11 with the collar 13a interposed therebetween. The rivet 14 is made of aluminum or the like, and has a circular head 14a at the bottom and a tip 14b projecting upward from the insulating washer 13. Between the flange 13a of the insulating washer 13 and the head 14a of the rivet 14, a positive terminal 15 bent in a substantially L-shape is sandwiched. The periphery of the central hole 12a of the holding member 12 is formed by engraving, and a bowl-shaped conduction washer 16 made of a metal plate is attached to the engraved portion. Then, the tip 14b of the rivet 14 inserted into the insulating washer 13 is crushed by caulking or the like, and the rivet 14 is
And the conduction washer 16 are electrically conducted.
【００１７】前記リベット１４の先端部１４ｂがカシメ
られた上方には、金属板にニッケル等のメッキが施され
た外部正極１７が、導通ワッシャ１６の外周側の鍔部に
接合されて取り付けられている。前記ダイアフラム部Ｄ
が形成された部分の底板１１ｂの下面側には、図６に示
すように、ダイアフラム部Ｄの中央部付近の厚肉部１１
ｅに接合するための、リード部１８ｂに設けられた接合
部１８ａを有する、負極端子から成る内部端子１８が配
設されている。この内部端子は、ニッケル等の金属板で
形成され、横長のリード部１８ｂの右側端部が、図示下
方側にＬ字状に折り曲げられて端子部１８ｃが形成さて
いる。An external positive electrode 17 formed by plating a metal plate with nickel or the like is joined to and attached to a flange on the outer peripheral side of the conductive washer 16 above the rivet 14 at which the tip portion 14b is crimped. I have. The diaphragm part D
As shown in FIG. 6, on the lower surface side of the bottom plate 11b where the
An internal terminal 18 composed of a negative electrode terminal and having a joining portion 18a provided on the lead portion 18b for joining to the terminal e is provided. The internal terminal is formed of a metal plate such as nickel, and the right end of the horizontally long lead portion 18b is bent downward in the L-shape to form a terminal portion 18c.
【００１８】前記内部端子１８は、リード部１８ｂの両
端寄りと電池蓋１１との間に形成した絶縁膜１９を介し
て、電池蓋１１に取り付けられている。前記絶縁膜１９
は、リード部１８ｂの接合部１８ａの両側にあって電池
蓋１１との間に形成されている。このような絶縁膜１９
は、例えば絶縁テープを巻回して所定の膜厚寸法でリー
ド部１８ｂ側に形成されている。The internal terminals 18 are attached to the battery cover 11 via an insulating film 19 formed between both ends of the lead portion 18b and the battery cover 11. The insulating film 19
Are formed on both sides of the joining portion 18a of the lead portion 18b and between the lead portion 18b and the battery lid 11. Such an insulating film 19
Is formed on the lead portion 18b side with a predetermined thickness by winding an insulating tape, for example.
【００１９】前記絶縁膜１９が形成された内部端子１８
は、図５に示すように、絶縁膜１９がダイアフラム部Ｄ
近傍の底板１１ｂに、接着剤（図示せず）等により固着
され、接合部１８ａがダイアフラム部Ｄの厚肉部１１ｅ
に抵抗溶接、あるいはレーザ溶接等で剥離可能に取り付
けられている。また、絶縁膜１９は、絶縁テープに限定
されるものでなく、熱収縮性の絶縁チューブ、またはテ
フロン等から成る絶縁性のコーティング材をコーティン
グした物、または成形材料をアウトサート成形により形
成した物、または接着剤をコーティングしたもの等でも
良い。The internal terminal 18 on which the insulating film 19 is formed
As shown in FIG. 5, the insulating film 19 has a diaphragm portion D
The bonding portion 18a is fixed to the nearby bottom plate 11b with an adhesive (not shown) or the like, and the thick portion 11e of the diaphragm portion D is formed.
Is detachably attached by resistance welding or laser welding. The insulating film 19 is not limited to the insulating tape, but may be a heat-shrinkable insulating tube, a material coated with an insulating coating material such as Teflon, or a material formed by outsert molding of a molding material. Or a material coated with an adhesive.
【００２０】また、内部端子１８は、絶縁膜１９によっ
て電池蓋１１の底板１１ｂと所定寸法の隙間が形成され
ているので、この隙間を通じて圧力上昇した電池の内圧
が、ダイアフラム部Ｄの凹部１１ｃにスムーズに侵入し
て、ダイアフラム部Ｄを迅速で確実に反転させることが
できる。前記内部端子１８をダイアフラム部Ｄに接合し
た電池蓋１１は、図２に示すように、外周部の鍔部１１
ａが電池ケースＫに溶接されて、正極素子と負極素子と
から成る発電素子（図示せず）を収納した電池ケースＫ
の内部が気密に遮蔽されるようになっている。Since the internal terminal 18 has a gap of a predetermined size formed from the bottom plate 11b of the battery lid 11 by the insulating film 19, the internal pressure of the battery that has increased in pressure through this gap is transferred to the concave portion 11c of the diaphragm D. The diaphragm portion D can be quickly and reliably turned over by smoothly invading. As shown in FIG. 2, the battery cover 11 in which the internal terminal 18 is joined to the diaphragm portion D has a flange portion 11 on the outer peripheral portion.
a is welded to the battery case K to house a power generating element (not shown) composed of a positive electrode element and a negative electrode element.
The interior of the is airtightly shielded.
【００２１】このような構成の電池の感圧電路遮断機構
Ｔの組立は、まず、電池蓋１１のダイアフラム部Ｄ下部
に内部端子１８の接合部１８ａを位置させ、内部端子１
８に形成した絶縁膜１９に接着剤（図示せず）等を塗布
し、この内部端子１８を電池蓋１１の底板１１ｂに接着
して取り付ける。すると、接合部１８ａとダイアフラム
部Ｄの厚肉部１１ｅとが、互いに当接、あるいは近接す
る。そして、この当接、あるいは近接した接合部１８ａ
とダイアフラム部Ｄの厚肉部１１ｅとを、例えば抵抗溶
接等により接合すると、電池蓋１１と、内部端子１８と
が電気的に導通される。In order to assemble the piezoelectric path interrupting mechanism T for a battery having such a structure, first, the joining portion 18a of the internal terminal 18 is located below the diaphragm D of the battery lid 11, and the internal terminal 1
An adhesive (not shown) or the like is applied to the insulating film 19 formed on the substrate 8, and the internal terminals 18 are attached to the bottom plate 11b of the battery lid 11 by bonding. Then, the joining portion 18a and the thick portion 11e of the diaphragm portion D abut or approach each other. Then, the contact portion or the adjacent joint portion 18a
When the thick portion 11e of the diaphragm portion D is joined to the thick portion 11e by, for example, resistance welding, the battery cover 11 and the internal terminal 18 are electrically connected.
【００２２】次に、導通ワッシャ１６を取り付けた保持
部材１２を、底板１１ｂ上に載置し、電池蓋１１の中央
孔１１ｈと、保持部材１２の中央孔１２ａとに絶縁ワッ
シャ１３を挿入する。そして、絶縁ワッシャ１３の孔
に、リベット１４の先端部１４ｂから挿入すると共に、
リベット１４の頭部１４ａと絶縁ワッシャ１３の鍔部１
３ａとの間に、正極端子１５を差し込んで狭持する。そ
して、図示しない治具でリベット１４の先端部１４ｂを
押しつぶすようにカシメて電池蓋１１と保持部材１２と
を一体化する。その後、導通ワッシャ１６の外周側の鍔
部に外部正極１７をスポット溶接等により接合する。す
ると、内部の正極端子１５と外部正極１７とが、リベッ
ト１４を介して電気的に導通される。Next, the holding member 12 to which the conductive washer 16 is attached is placed on the bottom plate 11b, and the insulating washer 13 is inserted into the center hole 11h of the battery cover 11 and the center hole 12a of the holding member 12. Then, while being inserted into the hole of the insulating washer 13 from the tip portion 14b of the rivet 14,
Head 14a of rivet 14 and flange 1 of insulating washer 13
The positive electrode terminal 15 is inserted and sandwiched between the positive terminal 3a and the positive terminal 3a. Then, the battery cover 11 and the holding member 12 are integrated by caulking so as to crush the tip portion 14b of the rivet 14 with a jig (not shown). Thereafter, the external positive electrode 17 is joined to the flange on the outer peripheral side of the conductive washer 16 by spot welding or the like. Then, the internal positive electrode terminal 15 and the external positive electrode 17 are electrically connected via the rivet 14.
【００２３】次に、正極端子を電池内部の発電素子であ
る正極素子（図示せず）に接続すると、外部正極１７と
正極素子との間に、リベット１４を介して正極の電路が
形成される。また、負極端子から成る内部端子１８を電
池内部の負極素子（図示せず）に接続すると、電池蓋１
１と発電素子である負極素子（図示せず）との間に、ダ
イアフラム部Ｄと内部端子１８とを介して負極の電路が
形成される。また、前記内部端子１８とダイアフラム部
Ｄとの接合は、先にリベット１５をカシメて保持部材１
２を電池蓋１１とを一体化し、その後に内部端子１８と
ダイアフラム部Ｄとの接合を行うようにしても良い。Next, when the positive electrode terminal is connected to a positive electrode element (not shown), which is a power generating element inside the battery, a positive electrode circuit is formed between the external positive electrode 17 and the positive electrode element via a rivet 14. . When the internal terminal 18 composed of a negative electrode terminal is connected to a negative electrode element (not shown) inside the battery, the battery cover 1
An electric path of a negative electrode is formed between the first electrode 1 and a negative electrode element (not shown) as a power generating element via a diaphragm D and an internal terminal 18. The connection between the internal terminal 18 and the diaphragm portion D is performed by first caulking the rivet 15 and holding the holding member 1.
2 may be integrated with the battery cover 11, and then the internal terminal 18 and the diaphragm portion D may be joined.
【００２４】このような手順で組み立てられた本発明の
電池の感圧電路遮断機構Ｔの動作は、電池ケースＫ内部
に異常が発生して、電池内部の圧力が上昇すると、圧力
上昇した気体が、ダイアフラム部Ｄの凹部１１ｃ内に侵
入し、ダイアフラム部Ｄの薄肉部１１ｄを上方に押し上
げようとする押し上げ力が働く。そして、電池の内部圧
力が所定値以上に上昇して、前記押し上げ力が大きくな
ると、内部端子１８に接合している、ダイアフラム部Ｄ
が接合部１８ａから剥離されて、ダイアフラム部Ｄが一
気に上方に反転して変位する。The operation of the piezoelectric sensing path cut-off mechanism T of the battery of the present invention assembled in such a procedure is such that when an abnormality occurs inside the battery case K and the pressure inside the battery rises, the gas whose pressure has risen rises. Then, a pushing force is exerted to penetrate into the concave portion 11c of the diaphragm portion D and push up the thin portion 11d of the diaphragm portion D upward. When the internal pressure of the battery rises to a predetermined value or more and the pushing force increases, the diaphragm D joined to the internal terminal 18
Is peeled off from the joint portion 18a, and the diaphragm portion D is flipped upward and displaced at a stretch.
【００２５】そのために、内部端子１８のリード部１８
ｂと、ダイアフラム部Ｄの厚肉部１１ｅとが大きく離間
し、電池蓋１１と電池ケースＫ内部の発電素子である負
極素子（図示せず）との間の電路が遮断される。この電
路遮断で、電池ケースＫ内部の圧力上昇が抑えられ、電
池の破裂を未然に防止することができる。また、電池蓋
１１と電池ケースＫ内部の発電素子（図示せず）との間
の電路が遮断されても、もし、電池内部の圧力上昇が停
止しないで、更に内圧が上昇するような場合には、この
更に上昇した電池内圧が安全弁部Ｚの突出部１１ｆに加
わり、突出部１１ｆを上方に押し上げようとする力で、
薄肉に形成された連結部１１ｇを破断する。そして、連
結部１１ｇの破断部分から、電池内部の高圧になった気
体が外部に排出され、電池の破裂を未然に防止すること
ができる。Therefore, the lead portion 18 of the internal terminal 18
b and the thick portion 11e of the diaphragm portion D are largely separated from each other, and the electric circuit between the battery lid 11 and a negative electrode element (not shown) which is a power generation element inside the battery case K is cut off. Due to this electric circuit interruption, the pressure increase inside the battery case K is suppressed, and the rupture of the battery can be prevented. Also, even if the electric circuit between the battery lid 11 and the power generating element (not shown) inside the battery case K is cut off, if the pressure inside the battery does not stop rising and the internal pressure further rises, Is a force that applies the further increased battery internal pressure to the protruding portion 11f of the safety valve portion Z to push the protruding portion 11f upward,
The thin connecting portion 11g is broken. Then, the high-pressure gas inside the battery is discharged to the outside from the broken portion of the connection portion 11g, so that the battery can be prevented from bursting.
【００２６】前述した本発明の実施の形態の説明では、
絶縁膜１９を内部端子１８のリード部１８ｂ側に形成し
た物で説明したが、図８に示すように、リード部１８ｂ
が対向する位置の電池蓋１１側に、絶縁膜から成る絶縁
膜２９を形成したものでも良い。また、本発明の説明で
は、内部端子１８の接合部１８ａとダイアフラム部Ｄと
を剥離する構造で説明したが、図７に示すように、内部
端子１８の接合部１８ａ近傍の両側に、例えばＶ字状の
溝から成る薄肉部１８ｄ、１８ｄを形成し、電池ケース
Ｋ内部の圧力が上昇して、ダイアフラム部Ｄを上方に押
し上げようとする力で、内部端子１８を薄肉部１８ｄ、
１８ｄから破断させるようにしたものでも良い。前記薄
肉部１８ｄは、接合部１８ａの両側に形成しないで、図
７に示す接合部１８ａの右側だけに形成したものでも良
い。In the above description of the embodiment of the present invention,
Although the insulating film 19 has been described as being formed on the lead portion 18b side of the internal terminal 18, as shown in FIG.
An insulating film 29 made of an insulating film may be formed on the side of the battery lid 11 at a position facing the. Further, in the description of the present invention, the structure in which the joint portion 18a of the internal terminal 18 and the diaphragm portion D are separated has been described. However, as shown in FIG. The thin portions 18d, 18d formed of a U-shaped groove are formed, and the pressure inside the battery case K is increased, and the internal terminal 18 is moved upward by a force to push the diaphragm D upward.
The one that is broken from 18d may be used. The thin portion 18d may not be formed on both sides of the joint 18a, but may be formed only on the right side of the joint 18a shown in FIG.
【００２７】[0027]
【発明の効果】本発明の電池の感圧電路遮断機構は、接
合部の両側にあって電池蓋との間に形成した絶縁膜を介
して、内部端子が電池蓋に取り付けられ、接合部とダイ
アフラム部とを接合して、電池蓋と発電素子との間に電
路を形成したので、絶縁膜を介して内部端子を電池蓋に
取り付けることができ、部品点数を少なくすることがで
きると共に、電池の内圧変動が低圧であっても迅速に動
作可能な、高感度で小型の電池の感圧電路遮断機構を提
供できる。According to the present invention, the internal terminals are attached to the battery cover via insulating films formed on both sides of the joint and between the battery cover and the joint. Since the diaphragm and the diaphragm are joined to form an electric path between the battery lid and the power generating element, the internal terminals can be attached to the battery lid via an insulating film, so that the number of parts can be reduced and the battery can be reduced. A high-sensitivity, small-sized battery-sensitive piezoelectric path blocking mechanism that can operate quickly even when the internal pressure fluctuation is low is provided.
【００２８】また、前記絶縁膜は、前記内部端子の前記
リード部側に形成したので、絶縁テープ、あるいは絶縁
チューブ等から成る絶縁膜を内部端子に容易に形成する
ことができ、製造が容易である。Further, since the insulating film is formed on the side of the lead portion of the internal terminal, an insulating film made of an insulating tape, an insulating tube or the like can be easily formed on the internal terminal. is there.
【００２９】また、前記絶縁膜は、前記リード部が対向
する位置の前記電池蓋側に形成したので、絶縁膜を電池
蓋の裏面に接着剤等をコーティングにより形成すること
ができ、製造が容易な電池の感圧電路遮断機構を提供で
きる。Further, since the insulating film is formed on the side of the battery lid at a position where the lead portion faces, the insulating film can be formed by coating an adhesive or the like on the back surface of the battery lid, which facilitates manufacturing. The present invention can provide a piezoelectric sensing path cutoff mechanism for a battery.
【００３０】また、前記内部端子は、前記リード部に破
断容易な薄肉部を形成したので、電池の内圧上昇が低圧
であっても、内部端子を薄肉部から迅速に破断すること
ができ、高感度であると共に、小型化が容易な電池の感
圧電路遮断機構を提供できる。Further, since the internal terminal has a thin portion which is easily broken at the lead portion, even if the internal pressure of the battery is low, the internal terminal can be rapidly broken from the thin portion. It is possible to provide a battery-sensitive piezoelectric path cutoff mechanism that has high sensitivity and can be easily miniaturized.
【図１】本発明の電池の感圧電路遮断機構を示す上面図
である。FIG. 1 is a top view showing a piezoelectric sensing path blocking mechanism of a battery according to the present invention.
【図２】図１の２−２断面図である。FIG. 2 is a sectional view taken along line 2-2 of FIG.
【図３】本発明に係わる下面図である。FIG. 3 is a bottom view according to the present invention.
【図４】本発明に係わる要部断面側面図である。FIG. 4 is a sectional side view of a main part according to the present invention.
【図５】本発明に係わる要部拡大断面図である。FIG. 5 is an enlarged sectional view of a main part according to the present invention.
【図６】本発明に係わる内部端子の斜視図である。FIG. 6 is a perspective view of an internal terminal according to the present invention.
【図７】本発明に係わる内部端子の変形例を示す斜視図
である。FIG. 7 is a perspective view showing a modification of the internal terminal according to the present invention.
【図８】本発明に係わるその他の実施の形態の要部拡大
断面図である。FIG. 8 is an enlarged sectional view of a main part of another embodiment according to the present invention.
【図９】従来の電池の感圧電路遮断機構を示す要部断面
図である。FIG. 9 is a cross-sectional view of a main part showing a conventional piezoelectric sensing path blocking mechanism of a battery.
【図１０】従来の電池の感圧電路遮断機構の動作を説明
する要部断面図である。FIG. 10 is a cross-sectional view of a main part explaining the operation of a conventional piezoelectric sensing path blocking mechanism of a battery.
Ｔ 本発明の電池の感圧電路遮断機構 １１ 電池蓋 １１ａ 鍔部 １１ｂ 底板 １１ｃ 凹部 １１ｄ 薄肉部 １１ｅ 厚肉部 １１ｆ 突出部 １１ｇ 連結部 １１ｈ 中央孔 １２ 保持部材 １２ａ 中央孔 １２ｂ 第１凹部 １２ｃ 第１通気口 １２ｄ 第２凹部 １２ｅ 第２通気口 １３ 絶縁ワッシャ １３ａ 鍔部 １４ リベット １４ａ 頭部 １４ｂ 先端部 １５ 正極端子 １６ 導通ワッシャ １７ 外部正極 １８ 内部端子 １８ａ 接合部 １８ｂ リード部 １８ｃ 端子部 １９ 絶縁膜 Ｋ 電池ケース Ｄ ダイアフラム部 Ｚ 安全弁部 T Piezoelectric path blocking mechanism of battery of the present invention 11 Battery lid 11a Flange 11b Bottom plate 11c Concave part 11d Thin part 11e Thick part 11f Projection part 11g Connecting part 11h Central hole 12 Holding member 12a Central hole 12b First concave part 12c First Vent 12d Second recess 12e Second vent 13 Insulation washer 13a Flange 14 Rivet 14a Head 14b Tip 15 Positive terminal 16 Conductive washer 17 External positive electrode 18 Internal terminal 18a Joint 18b Lead 18c Terminal 19 Insulating film K Battery case D Diaphragm Z Safety valve
Claims (4)
と、この電池ケースの内部を気密に遮蔽する電池蓋と、
この電池蓋の一部に前記電池ケースの内方に向けて膨出
形成したダイアフラム部と、前記発電素子に接続され、
前記ダイアフラム部の中央部付近に接合するためのリー
ド部に設けられた接合部を有する内部端子とを備え、前
記接合部の両側に形成した絶縁膜を介して、前記内部端
子が前記電池蓋に取り付けられ、前記接合部と前記ダイ
アフラム部とを接合して、前記電池蓋と前記発電素子と
の間に電路を形成し、前記電池ケースの内圧が所定値以
上に上昇すると、前記ダイアフラム部が、前記内部端子
の前記接合部を破断、あるいは前記接合部から剥離して
変位し、前記電路を遮断するようにしたことを特徴とす
る電池の感圧電路遮断機構。1. A battery case accommodating a power generating element therein, a battery lid for hermetically shielding the inside of the battery case,
A part of this battery cover is connected to the diaphragm part swelled toward the inside of the battery case and the power generating element,
An internal terminal having a joint provided on a lead portion for joining near a central portion of the diaphragm, wherein the internal terminal is connected to the battery lid via insulating films formed on both sides of the joint. Attached, the joining portion and the diaphragm portion are joined to form an electric path between the battery lid and the power generating element, and when the internal pressure of the battery case rises to a predetermined value or more, the diaphragm portion is The piezoelectric circuit interrupting mechanism for a battery, wherein the joint of the internal terminal is broken or is separated from the joint and displaced to cut off the electric circuit.
ド部側に形成したことを特徴とする請求項１記載の電池
の感圧電路遮断機構。2. The mechanism according to claim 1, wherein the insulating film is formed on the lead side of the internal terminal.
位置の前記電池蓋側に形成したことを特徴とする請求項
１記載の電池の感圧電路遮断機構。3. The mechanism according to claim 1, wherein the insulating film is formed on the side of the battery lid at a position where the lead portion faces.
易な薄肉部を形成したことを特徴とする請求項１、２、
または３記載の電池の感圧電路遮断機構。4. The device according to claim 1, wherein said internal terminal has a thin portion which is easily broken at said lead portion.
Or the piezoelectric path cutoff mechanism of the battery according to 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11057151A JP2000260421A (en) | 1999-03-04 | 1999-03-04 | Pressure sensitive circuit breaking mechanism of battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11057151A JP2000260421A (en) | 1999-03-04 | 1999-03-04 | Pressure sensitive circuit breaking mechanism of battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000260421A true JP2000260421A (en) | 2000-09-22 |
Family
ID=13047579
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11057151A Withdrawn JP2000260421A (en) | 1999-03-04 | 1999-03-04 | Pressure sensitive circuit breaking mechanism of battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000260421A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008066255A (en) * | 2006-08-11 | 2008-03-21 | Sanyo Electric Co Ltd | Nonaqueous electrolyte secondary battery |
| JP2008066254A (en) * | 2006-08-11 | 2008-03-21 | Sanyo Electric Co Ltd | Nonaqueous electrolyte secondary battery |
| JP2012230905A (en) * | 2006-08-11 | 2012-11-22 | Sanyo Electric Co Ltd | Nonaqueous electrolyte secondary battery |
| WO2013125431A1 (en) * | 2012-02-21 | 2013-08-29 | 株式会社豊田自動織機 | Electrical storage device |
| JP2013186954A (en) * | 2012-03-06 | 2013-09-19 | Toyota Industries Corp | Power storage unit, secondary battery, and vehicle |
| WO2014014026A1 (en) * | 2012-07-19 | 2014-01-23 | 株式会社豊田自動織機 | Power storage device equipped with current interrupter device |
-
1999
- 1999-03-04 JP JP11057151A patent/JP2000260421A/en not_active Withdrawn
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008066255A (en) * | 2006-08-11 | 2008-03-21 | Sanyo Electric Co Ltd | Nonaqueous electrolyte secondary battery |
| JP2008066254A (en) * | 2006-08-11 | 2008-03-21 | Sanyo Electric Co Ltd | Nonaqueous electrolyte secondary battery |
| JP2012230905A (en) * | 2006-08-11 | 2012-11-22 | Sanyo Electric Co Ltd | Nonaqueous electrolyte secondary battery |
| WO2013125431A1 (en) * | 2012-02-21 | 2013-08-29 | 株式会社豊田自動織機 | Electrical storage device |
| JP2013201113A (en) * | 2012-02-21 | 2013-10-03 | Toyota Industries Corp | Power storage device and vehicle |
| JP2013186954A (en) * | 2012-03-06 | 2013-09-19 | Toyota Industries Corp | Power storage unit, secondary battery, and vehicle |
| WO2014014026A1 (en) * | 2012-07-19 | 2014-01-23 | 株式会社豊田自動織機 | Power storage device equipped with current interrupter device |
| JPWO2014014026A1 (en) * | 2012-07-19 | 2016-07-07 | 株式会社豊田自動織機 | Power storage device with current interrupt device |
| US9543563B2 (en) | 2012-07-19 | 2017-01-10 | Kabushiki Kaisha Toyota Jidoshokki | Electric storage device including current interruption device |
| US9685650B2 (en) | 2012-07-19 | 2017-06-20 | Kabushiki Kaisha Toyota Jidoshokki | Electric storage device including current interruption device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20060509 |