JPH10125304A - Sealed battery - Google Patents
Sealed batteryInfo
- Publication number
- JPH10125304A JPH10125304A JP8278386A JP27838696A JPH10125304A JP H10125304 A JPH10125304 A JP H10125304A JP 8278386 A JP8278386 A JP 8278386A JP 27838696 A JP27838696 A JP 27838696A JP H10125304 A JPH10125304 A JP H10125304A
- Authority
- JP
- Japan
- Prior art keywords
- plate
- battery
- shape memory
- memory alloy
- valve
- 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.)
- Pending
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]
【産業上の利用分野】本発明は、温度上昇を伴う異常時
に作動する安全装置を持つ封口体で電池ケースの開口部
を密閉している密閉型電池に関し、詳しくは、その封口
体に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sealed battery in which the opening of a battery case is sealed with a sealing member having a safety device which operates when an abnormality occurs due to an increase in temperature, and more particularly to the sealing member.
【０００２】[0002]
【従来の技術】温度上昇を伴う異常時に作動する安全装
置を持つ従来の封口体としては、例えば、実開平４−４
６３５９号公報に記載されているものがある。この公報
に記載されている封口体は、蓋板と端子板との電気接続
を、ＰＴＣ素子（正温度係数素子）を介しての接触でな
している。そして、ＰＴＣ素子は、温度上昇を伴う異常
時に、素子の抵抗値を増大して、電流抑制素子として作
動する。しかし、電流を抑制するだけで、電流を完全に
は遮断できないＰＴＣ素子では、不安全であるという問
題がある。2. Description of the Related Art As a conventional sealing body having a safety device which operates when an abnormality occurs due to a rise in temperature, for example, Japanese Utility Model Laid-Open No.
There is one described in JP-A-6359. In the sealing body described in this publication, electrical connection between the lid plate and the terminal plate is made by contact via a PTC element (positive temperature coefficient element). The PTC element operates as a current suppressing element by increasing the resistance value of the element at the time of abnormality accompanied by a temperature rise. However, there is a problem that a PTC element that cannot completely cut off the current only by suppressing the current is unsafe.
【０００３】これに対して、実開昭６２−５５６４号公
報に記載されている封口体では、温度上昇を伴う異常時
に、形状記憶合金が変形して、電流を完全に遮断するこ
とができる。しかしながら、蓋板と端子板との電気接続
を、スプリング状の形状記憶合金の一端を端子板に溶接
して、この形状記憶合金の他端をスプリングの弾性力で
蓋板に接触させることで行っているので、この封口体で
は、溶接工程が不可欠である。それで、この封口体に
は、溶接工程が存在するために製造工程が煩雑になり生
産性が非常に悪いという問題がある。On the other hand, in the sealing body described in Japanese Utility Model Application Laid-Open No. Sho 62-5564, the shape memory alloy is deformed at the time of an abnormality accompanied by a temperature rise, so that the current can be completely cut off. However, the electrical connection between the lid plate and the terminal plate is performed by welding one end of a spring-shaped shape memory alloy to the terminal plate and bringing the other end of the shape memory alloy into contact with the lid plate by the elastic force of the spring. Therefore, a welding process is indispensable for this sealing body. Therefore, this sealing body has a problem that the manufacturing process is complicated and the productivity is very poor because of the presence of the welding process.
【０００４】[0004]
【発明が解決しようとする課題】本発明は、温度上昇を
伴う異常時に作動する優れた安全装置を持ち、且つ、生
産性が良い封口体で電池ケースの開口部を密閉している
密閉型電池を提供しようとするものである。DISCLOSURE OF THE INVENTION The present invention relates to a sealed battery having an excellent safety device which operates in the event of an abnormality accompanied by a rise in temperature, and which closes the opening of the battery case with a sealing body having good productivity. It is intended to provide.
【０００５】[0005]
【課題を解決するための手段】本発明は、略中心部に弁
孔を有する蓋板と、弁孔を閉鎖するように蓋板の略中心
部に固着する弁板と、ガス抜き孔を有し且つ蓋板の上方
に位置する端子板と、蓋板と端子板との間を絶縁する絶
縁体と、蓋板の周辺部の上方に位置し、且つ、一端が蓋
板の周辺部と絶縁体とで挟持されると共に他端が端子板
と接触する形状記憶合金板とで構成され、所定温度以上
で形状記憶合金板が変形して形状記憶合金板の他端が端
子板から離れる封口体を備え、この封口体で電池ケース
の開口部を密閉していることを特徴とする。SUMMARY OF THE INVENTION The present invention comprises a cover plate having a valve hole at a substantially central portion, a valve plate fixed to a substantially central portion of the cover plate so as to close the valve hole, and a gas vent hole. A terminal plate located above the lid plate, an insulator for insulating between the lid plate and the terminal plate, and an insulator located above the peripheral portion of the lid plate and having one end insulated from the peripheral portion of the lid plate. A sealing member which is sandwiched by the body and has the other end in contact with the terminal plate, and wherein the shape memory alloy plate is deformed at a predetermined temperature or more and the other end of the shape memory alloy plate is separated from the terminal plate. And the opening of the battery case is hermetically sealed with the sealing body.
【０００６】そして、前記封口体が蓋板の略中心部と端
子板とで挟持されている樹脂体を持ち、この樹脂体は弁
孔とガス抜き孔とを連通するガイド孔を有し、このガイ
ド孔と形状記憶合金板とは樹脂体によって隔離されてい
ると好ましい。The sealing member has a resin body sandwiched between a substantially central portion of the cover plate and the terminal plate, and the resin body has a guide hole communicating the valve hole and the gas vent hole. Preferably, the guide hole and the shape memory alloy plate are separated by a resin body.
【０００７】[0007]
【作用】まず、本発明の電池の封口体が、温度上昇を伴
う異常時に作動する優れた安全装置を持っていることに
ついて言及する。First, it will be mentioned that the battery sealing body of the present invention has an excellent safety device which operates in the event of an abnormality accompanied by a temperature rise.
【０００８】本発明の電池の封口体は、安全装置とし
て、電流遮断方式と弁方式の２種類のものを持ってい
る。[0008] The battery sealing body of the present invention has two types of safety devices, a current interrupt system and a valve system.
【０００９】そして、電流遮断方式とは、蓋板と端子板
との電気接続を、蓋板の周辺部の上方に位置する形状記
憶合金板の一端が蓋板の周辺部と絶縁体とで挟持されて
いることと、その形状記憶合金板の他端が端子板と接触
していることとでなし、温度上昇を伴う異常時に、その
形状記憶合金板が変形して端子板から離れることによ
り、蓋板と端子板との電気的接続が遮断されるものであ
る。因に、この電流遮断方式では、ＰＴＣ素子を用いた
場合のような、電流を完全に遮断できないという問題が
生じない。In the current interruption method, an electric connection between the lid plate and the terminal plate is held by an end of the shape memory alloy plate located above the peripheral portion of the lid plate between the peripheral portion of the lid plate and the insulator. And that the other end of the shape memory alloy plate is in contact with the terminal plate, and in the event of an abnormality involving a rise in temperature, the shape memory alloy plate deforms and separates from the terminal plate, The electrical connection between the lid plate and the terminal plate is interrupted. However, this current cut-off method does not cause a problem that the current cannot be cut off completely as in the case of using a PTC element.
【００１０】一方、弁方式とは、電池の内部と電池の外
部との連通の閉鎖、つまり、蓋板の略中心部に存在する
弁孔の閉鎖を、その弁孔を閉鎖するように蓋板の略中心
部に弁板を固着させることでなし、電池の温度が上昇し
て電池の内部の圧力が所定値以上になった時に、その弁
板の破損又は蓋板からの剥離により弁孔が開放されて、
電池の内部と電池の外部とが連通することにより、電池
の内部の圧力が解放されるものである。[0010] On the other hand, the valve system means that the communication between the inside of the battery and the outside of the battery is closed, that is, the closing of the valve hole existing substantially at the center of the cover plate is performed by closing the valve plate so as to close the valve hole. When the temperature of the battery rises and the internal pressure of the battery exceeds a predetermined value, the valve hole is damaged due to breakage of the valve plate or peeling off from the lid plate. Being open,
The communication between the inside of the battery and the outside of the battery releases pressure inside the battery.
【００１１】尚、本発明の電池の封口体は、電流遮断方
式を蓋板の周辺部の上方部で構成し、弁方式を蓋板の略
中心部で構成することで、電流遮断方式と弁方式とを両
立させている。It is to be noted that the battery sealing body of the present invention is characterized in that the current interrupting method is constituted by an upper portion of the peripheral portion of the cover plate and the valve system is constituted by a substantially central portion of the cover plate. It is compatible with the system.
【００１２】以上のことから、本発明の電池の封口体
は、温度上昇を伴う異常時に作動する優れた安全装置を
持っていると言える。From the above, it can be said that the battery sealing body of the present invention has an excellent safety device that operates when an abnormality occurs due to an increase in temperature.
【００１３】因に、本発明の電池の封口体が蓋板の略中
心部と端子板とで挟持されている樹脂体を持ち、この樹
脂体は弁孔とガス抜き孔とを連通するガイド孔を有し、
このガイド孔と形状記憶合金板とは樹脂体によって隔離
されていると好ましい理由は、以下の通りである。The sealing body of the battery of the present invention has a resin body sandwiched between a substantially central portion of the cover plate and the terminal plate, and the resin body has a guide hole communicating with the valve hole and the gas vent hole. Has,
The reason why the guide hole and the shape memory alloy plate are preferably separated by a resin body is as follows.
【００１４】形状記憶合金板が変形して端子板から離れ
る時、スパークが発生することがある。又、弁孔の開放
時、電池ケースの中のガスや電解液がその弁孔から封口
体の中に排出される。それで、この排出されるガスや電
解液が可燃性で、弁孔が開放してその可燃性のガスや電
解液が、端子板の形状記憶合金板との接点付近に存在し
ている時に、そのスパークが発生すると、電池が発火す
る可能性がある。しかし、弁孔とガス抜き孔とを連通す
るガイド孔を有し、弁孔と形状記憶合金板とを隔離する
樹脂体があると、弁孔が開放されても、その可燃性のガ
スや電解液は、弁孔からガス抜き孔へ誘導されて、端子
板の形状記憶合金板との接点付近に存在することがない
ので、そのスパークによる電池の発火がない。When the shape memory alloy plate deforms and separates from the terminal plate, a spark may be generated. Also, when the valve hole is opened, gas and electrolyte in the battery case are discharged from the valve hole into the sealing body. Therefore, when the discharged gas or electrolyte is flammable and the valve hole is opened and the flammable gas or electrolyte is present near the contact point of the terminal plate with the shape memory alloy plate, When a spark occurs, the battery may ignite. However, if there is a guide hole that communicates the valve hole and the gas vent hole and there is a resin body that separates the valve hole from the shape memory alloy plate, even if the valve hole is opened, the flammable gas or electrolytic Since the liquid is guided from the valve hole to the gas vent hole and does not exist near the contact point of the terminal plate with the shape memory alloy plate, there is no ignition of the battery due to the spark.
【００１５】そして、その樹脂体と蓋板との間に弁板が
ある構成とし、その樹脂体を、以下のように機能させる
こともできる。[0015] A valve plate may be provided between the resin body and the cover plate, and the resin body may function as follows.
【００１６】弁板が金属薄板と熱溶融固着性フィルムと
をラミネートした熱溶融固着性薄膜で、その熱溶融固着
性フィルムを蓋板に熱溶融固着することによって弁孔を
閉鎖した場合、電池を高温下で保存すると、熱溶融固着
性フィルムが溶融して弁板の蓋板との固着性が低下す
る。それで、弁板を金属薄板と熱溶融固着性フィルムと
をラミネートした熱溶融固着性薄膜とする場合には、蓋
板の略中心部と端子板とで挟持されている樹脂体を、弁
板の蓋板との固着部を蓋板に押圧するように構成するこ
とにより、電池の高温保存による弁板の蓋板との固着性
の低下を防止することができる。When the valve plate is a hot-melt fixable thin film obtained by laminating a metal thin plate and a hot-melt fixable film, and the valve hole is closed by hot-melt fixing the hot-melt fixable film to the lid plate, the battery is closed. When stored at a high temperature, the hot-melt adhesive film melts and the adhesiveness of the valve plate to the cover plate decreases. Therefore, when the valve plate is a hot-melt adhesive thin film obtained by laminating a metal thin plate and a hot-melt adhesive film, the resin body sandwiched between the substantially central portion of the cover plate and the terminal plate is used as the valve plate. By configuring the fixing portion with the cover plate to be pressed against the cover plate, it is possible to prevent a decrease in the fixability of the valve plate to the cover plate due to storage of the battery at a high temperature.
【００１７】次に、本発明の電池の封口体が、生産性の
良いものであることについて言及する。Next, the fact that the battery sealing body of the present invention has good productivity will be described.
【００１８】本発明の電池の封口体は、蓋板と端子板と
の電気接続を、蓋板の周辺部の上方に位置する形状記憶
合金板の一端が蓋板の周辺部と絶縁体とで挟持されてい
ることと、その形状記憶合金板の他端が端子板と接触し
ていることとでなしている。これによって、本発明の電
池の封口体は、弁板が固着している蓋板、形状記憶合金
板、絶縁体、及び、端子板を、この順に積み重ねる方法
で製造できる。それで、本発明の電池の封口体では、溶
接工程が存在するために製造工程が煩雑になり生産性が
非常に悪いという前記のような問題が生じない。In the battery sealing body of the present invention, the electrical connection between the lid plate and the terminal plate is established by connecting one end of the shape memory alloy plate located above the peripheral portion of the lid plate to the peripheral portion of the lid plate and the insulator. This is achieved by being sandwiched and the other end of the shape memory alloy plate being in contact with the terminal plate. Thereby, the sealing body of the battery of the present invention can be manufactured by a method of stacking the lid plate to which the valve plate is fixed, the shape memory alloy plate, the insulator, and the terminal plate in this order. Therefore, in the battery sealing body of the present invention, since the welding process is present, the manufacturing process is complicated, and the above-described problem of extremely low productivity does not occur.
【００１９】以上のことから、本発明の電池の封口体
は、生産性の良いものであると言える。From the above, it can be said that the battery sealing body of the present invention has good productivity.
【００２０】尚、封口体が蓋板の略中心部と端子板とで
挟持されている樹脂体を持っている場合であっても、こ
の樹脂体の付加によって溶接工程が付加されるわけでな
く、樹脂体を端子板に組み込み、弁板が固着している蓋
板、形状記憶合金板、絶縁体、及び、樹脂体が組み込ま
れている端子板をこの順に積み重ねる方法で封口体は製
造できるので、本発明の電池の封口体は生産性の良いも
のであると言える。Even when the sealing body has a resin body sandwiched between the substantially central portion of the cover plate and the terminal plate, the addition of this resin body does not add a welding step. Since the resin body is incorporated in the terminal plate, and the lid plate to which the valve plate is fixed, the shape memory alloy plate, the insulator, and the terminal plate in which the resin body is incorporated are stacked in this order, the sealing body can be manufactured. It can be said that the battery sealing body of the present invention has good productivity.
【００２１】[0021]
【実施例】以下に、本発明の密閉型電池の実施例を、円
筒スパイラル型電池で、図面に基づいて説明する。但
し、以下に示す実施例は、本発明の技術思想を具体化す
るもので、本発明を限定するものではない。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a sealed battery according to the present invention will be described below with reference to the drawings by using a cylindrical spiral battery. However, the embodiments described below embody the technical idea of the present invention and do not limit the present invention.
【００２２】尚、図１は、本発明に係る密閉型電池の概
略構造断面図であり、図２は、図１の封口体の分解概略
構造断面図である。FIG. 1 is a schematic structural sectional view of the sealed battery according to the present invention, and FIG. 2 is an exploded schematic structural sectional view of the sealing body of FIG.
【００２３】〔封口体の作製〕厚み２０μｍのアルミニ
ウム薄板と、厚み４０μｍの熱溶融固着性ポリエチレン
フィルムとをラミネートした熱溶融固着性薄膜である弁
板１を、ステンレス鋼製の蓋板２の内底面に、弁孔３と
この弁孔３の付近とを覆うように、且つ、熱溶融固着性
ポリエチレンフィルムが蓋板２に接するように配し、１
４０℃×１０秒間のホットプレスで、弁板１を蓋板２に
熱溶融固着した。尚、弁板１は、弁孔３に対向する部分
を除いた全面が蓋板２に固着している。因に、電池の内
部の圧力が所定値以上になると、弁板１の破損又は蓋板
２からの剥離によって弁孔３が開放されて、電池の内部
の圧力が解放される。[Production of Sealing Body] A valve plate 1 which is a hot-melt adhesive thin film obtained by laminating a 20-μm-thick aluminum thin plate and a 40-μm-thick hot-melt adhesive polyethylene film is placed in a stainless steel lid plate 2. On the bottom surface, the valve hole 3 and the vicinity of the valve hole 3 are arranged so as to cover the same, and the hot-melt fixable polyethylene film is disposed in contact with the lid plate 2.
The valve plate 1 was hot-melt-fixed to the cover plate 2 by hot pressing at 40 ° C. × 10 seconds. Note that the entire surface of the valve plate 1 except for the portion facing the valve hole 3 is fixed to the lid plate 2. When the internal pressure of the battery becomes equal to or higher than a predetermined value, the valve hole 3 is opened due to breakage of the valve plate 1 or peeling from the cover plate 2, and the internal pressure of the battery is released.
【００２４】次に、図２に示すように、蓋板２の上に、
リング状の形状記憶合金板４、ポリプロピレン製の絶縁
体５、樹脂体６が組み込まれているステンレス鋼製の端
子板７を積み重ねた。Next, as shown in FIG.
A ring-shaped shape memory alloy plate 4, an insulator 5 made of polypropylene, and a terminal plate 7 made of stainless steel in which a resin body 6 is incorporated are stacked.
【００２５】そして、図１に示すように、蓋板２の周縁
部を、所定温度で変形するように記憶処理した形状記憶
合金板４、絶縁体５、及び、端子板７にカシメ付けて、
封口体を作製した。Then, as shown in FIG. 1, the peripheral portion of the cover plate 2 is caulked to the shape memory alloy plate 4, the insulator 5, and the terminal plate 7 which are memorized so as to be deformed at a predetermined temperature.
A sealing body was prepared.
【００２６】尚、蓋板２と端子板７との電気接続は、形
状記憶合金板４における一端（リングの外周側）の蓋板
２における周辺部との接触と、形状記憶合金板４におけ
る他端（リングの内周側）の端子板７との接触とでなし
ている。そして、絶縁体５は、蓋板２及び形状記憶合金
板４の一端と端子板７とを電気的に絶縁している。それ
で、密閉型電池の温度が所定値以上になると、形状記憶
合金板４の変形（図１、図２の形状記憶合金板４が点線
の形状になる変形）によって、形状記憶合金板４の他端
と端子板７との電気接続が遮断される。The electrical connection between the cover plate 2 and the terminal plate 7 is made by contacting one end (outer side of the ring) of the shape memory alloy plate 4 with the peripheral portion of the cover plate 2 and the other end of the shape memory alloy plate 4. The end (the inner peripheral side of the ring) is in contact with the terminal plate 7. The insulator 5 electrically insulates one end of the lid plate 2 and one end of the shape memory alloy plate 4 from the terminal plate 7. Therefore, when the temperature of the sealed battery becomes equal to or higher than a predetermined value, the shape memory alloy plate 4 is deformed (the shape memory alloy plate 4 in FIGS. The electrical connection between the end and the terminal plate 7 is cut off.
【００２７】又、樹脂体６は、蓋板２の略中心部と端子
板７とで挟持されている。そして、樹脂体６は、弁孔３
とガス抜き孔９とを連通するガイド孔１０を有し、弁孔
３と形状記憶合金板４とを隔離している。更に、樹脂体
６は、弁板１の蓋板２との固着部を蓋板２に押圧してい
る。それで、前記作用の欄で述べたように、樹脂体６
は、形状記憶合金板４が変形して端子板７から離れる時
のスパークによる電池の発火と、電池を高温下で保存し
た時における弁板１の蓋板２との固着性の低下とを防止
する。The resin body 6 is sandwiched between a substantially central portion of the cover plate 2 and the terminal plate 7. And the resin body 6 is provided with the valve hole 3.
And a guide hole 10 communicating the gas hole 9 with the gas vent hole 9 to isolate the valve hole 3 from the shape memory alloy plate 4. Further, the resin body 6 presses the fixed portion of the valve plate 1 with the cover plate 2 against the cover plate 2. Therefore, as described in the section of the operation, the resin body 6
Prevents the ignition of the battery due to the spark when the shape memory alloy plate 4 is deformed and separates from the terminal plate 7 and the decrease in the adhesion of the valve plate 1 to the cover plate 2 when the battery is stored at a high temperature. I do.
【００２８】〔集電板付正極の作製〕活物質としての二
酸化マンガン、導電材としての黒鉛、結着材としてのフ
ッ素樹脂、及び、水を所定の割合で混合して、適度な粘
性を有する正極合剤を作製した。[Preparation of Positive Electrode with Current Collector] A positive electrode having an appropriate viscosity is prepared by mixing manganese dioxide as an active material, graphite as a conductive material, a fluororesin as a binder, and water at a predetermined ratio. A mixture was prepared.
【００２９】この正極合剤を、ステンレス製のエキスパ
ンドメタルにコーティングし、ローラで圧延して、正極
圧延板を作製した。This positive electrode mixture was coated on an expanded metal made of stainless steel and rolled with a roller to produce a rolled positive electrode.
【００３０】この正極圧延板を、所定の大きさに切断
し、乾燥処理して、正極を作製した。The rolled positive electrode plate was cut into a predetermined size and dried to prepare a positive electrode.
【００３１】この正極の合剤層の一部分を剥離すること
により、エキスパンドメタルを露出させた。The expanded metal was exposed by removing a part of the mixture layer of the positive electrode.
【００３２】この露出の部分にステンレス薄板からなる
集電板１１をスポット溶接して、集電板付正極１２を作
製した。A current collector plate 11 made of a stainless steel sheet was spot-welded to the exposed portion to produce a positive electrode 12 with a current collector plate.
【００３３】〔集電板付負極の作製〕金属リチウム板を
所定の大きさに切断して、負極を作製した。[Preparation of negative electrode with current collector plate] A metal lithium plate was cut into a predetermined size to prepare a negative electrode.
【００３４】この負極の一部分にニッケル薄板からなる
集電板１３を圧着して、集電板付負極１４を作製した。A current collecting plate 13 made of a nickel thin plate was pressure-bonded to a part of the negative electrode to produce a negative electrode 14 with a current collecting plate.
【００３５】〔スパイラル状電極体の作製〕前記集電板
付正極１２と前記集電板付負極１４とを、セパレータ１
５を介しながらスパイラル状にして、スパイラル状電極
体を作製した。[Preparation of Spiral Electrode Body] The positive electrode 12 with a current collector and the negative electrode 14 with a current collector are
5 to form a spiral electrode body.
【００３６】〔電解液の作製〕プロピレンカーボネート
と、１，２−ジメトキシエタンとからなる溶媒に、過塩
素酸リチウムを溶解して、電解液を作製した。[Preparation of Electrolyte Solution] Lithium perchlorate was dissolved in a solvent composed of propylene carbonate and 1,2-dimethoxyethane to prepare an electrolyte solution.
【００３７】〔密閉型電池の作製〕前記スパイラル状電
極体、電池ケース開口側絶縁板１６、及び、電池ケース
底側絶縁板１７を、電池ケース８に挿入した。[Preparation of Sealed Battery] The spiral electrode body, the battery case opening side insulating plate 16 and the battery case bottom insulating plate 17 were inserted into the battery case 8.
【００３８】次に、電池ケース８の開口部付近に嵌合用
溝１８を形成し、この嵌合用溝１８に絶縁ガスケット１
９を当てがった。Next, a fitting groove 18 is formed near the opening of the battery case 8, and the insulating gasket 1 is inserted into the fitting groove 18.
9 was assigned.
【００３９】そして、負極側の集電板１３を電池ケース
８の底にスポット溶接し、正極側の集電板１１を前記封
口体の蓋板２にスポット溶接した。Then, the current collector plate 13 on the negative electrode side was spot-welded to the bottom of the battery case 8, and the current collector plate 11 on the positive electrode side was spot-welded to the cover plate 2 of the sealing body.
【００４０】それから、電池ケース８に前記電解液を注
入し、この電解液を電極等に充分に浸透させた。Then, the electrolytic solution was injected into the battery case 8, and the electrolytic solution was sufficiently permeated into the electrodes and the like.
【００４１】その後、電池ケース８の開口部付近を前記
封口体にカシメ付けて、密閉型電池を作製した。Thereafter, the vicinity of the opening of the battery case 8 was caulked to the above-mentioned sealing body to produce a sealed battery.
【００４２】[0042]
【発明の効果】本発明の電池の封口体は、温度上昇を伴
う異常時に作動する安全装置として、電流遮断方式と弁
方式の２種類のものを持っている。そして、本発明の電
池の封口体は、電流遮断方式を蓋板の周辺部の上方部で
構成し、弁方式を蓋板の略中心部で構成することで、電
流遮断方式と弁方式とを両立させている。The battery sealing body of the present invention has two types of safety devices, a current interrupting type and a valve type, as safety devices that operate in the event of an abnormality accompanied by an increase in temperature. In the battery sealing body of the present invention, the current interrupting method is configured at an upper portion of a peripheral portion of the cover plate, and the valve method is configured at substantially the center of the cover plate, so that the current interrupting method and the valve method are performed. I have both.
【００４３】又、本発明の電池の封口体は、蓋板と端子
板との電気接続を、蓋板の周辺部の上方に位置する形状
記憶合金板の一端が蓋板の周辺部と絶縁体とで挟持され
ていることと、その形状記憶合金板の他端が端子板と接
触していることとでなしている。これによって、本発明
の電池の封口体は、弁板が固着している蓋板、形状記憶
合金板、絶縁体、及び、端子板を、この順に積み重ねる
方法で製造できる。Further, in the battery sealing body of the present invention, one end of the shape memory alloy plate located above the peripheral portion of the lid plate is electrically connected to the insulator of the lid plate and the terminal plate. And that the other end of the shape memory alloy plate is in contact with the terminal plate. Thereby, the sealing body of the battery of the present invention can be manufactured by a method of stacking the lid plate to which the valve plate is fixed, the shape memory alloy plate, the insulator, and the terminal plate in this order.
【００４４】よって、本発明を実施することにより、温
度上昇を伴う異常時に作動する優れた安全装置を持ち、
且つ、生産性が良い封口体で電池ケースの開口部を密閉
している密閉型電池を提供することができる。Therefore, by implementing the present invention, there is provided an excellent safety device which operates at the time of an abnormality accompanied by a temperature rise,
In addition, it is possible to provide a sealed battery in which the opening of the battery case is sealed with a sealing body having good productivity.
【図１】本発明に係る密閉型電池の概略構造断面図FIG. 1 is a schematic sectional view of the structure of a sealed battery according to the present invention.
【図２】図１の封口体の分解概略構造断面図FIG. 2 is an exploded schematic structural sectional view of the sealing body of FIG. 1;
１・・弁板 ２・・蓋板 ３・・弁孔 ４・・形状記憶合金板 ５・・絶縁体 ６・・樹脂体 ７・・端子板 ８・・電池ケース ９・・ガス抜き孔 １０・・ガイド孔 1. Valve plate 2. Lid plate 3. Valve hole 4. Shape memory alloy plate 5. Insulator 6. Resin body 7. Terminal plate 8. Battery case 9. Gas vent hole 10.・ Guide hole
Claims (2)
る弁板と、 ガス抜き孔を有し且つ前記蓋板の上方に位置する端子板
と、 前記蓋板と前記端子板との間を絶縁する絶縁体と、 前記蓋板の周辺部の上方に位置し、且つ、一端が前記蓋
板の周辺部と前記絶縁体とで挟持されると共に他端が前
記端子板と接触する形状記憶合金板とで構成され、 所定温度以上で前記形状記憶合金板が変形して前記形状
記憶合金板の他端が前記端子板から離れる封口体を備
え、 この封口体で電池ケースの開口部を密閉していることを
特徴とする密閉型電池。A cover plate having a valve hole at a substantially central portion thereof; a valve plate fixed to a substantially central portion of the cover plate so as to close the valve hole; A terminal plate located above, an insulator for insulating between the lid plate and the terminal plate, and an insulator positioned above a peripheral portion of the lid plate and having one end insulated from a peripheral portion of the lid plate. A shape memory alloy plate sandwiched by a body and having the other end in contact with the terminal plate. The shape memory alloy plate is deformed at a predetermined temperature or more, and the other end of the shape memory alloy plate is the terminal plate. A sealed battery comprising: a sealing member separated from the battery case, wherein the sealing member seals an opening of the battery case.
端子板とで挟持されている樹脂体を持ち、 この樹脂体は前記弁孔と前記ガス抜き孔とを連通するガ
イド孔を有し、 このガイド孔と前記形状記憶合金板とは前記樹脂体によ
って隔離されていることを特徴とする請求項１に記載の
密閉型電池。2. The sealing body has a resin body sandwiched between a substantially central portion of the lid plate and the terminal plate, and the resin body has a guide hole communicating the valve hole and the gas vent hole. 2. The sealed battery according to claim 1, wherein the guide hole and the shape memory alloy plate are separated by the resin body. 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8278386A JPH10125304A (en) | 1996-10-21 | 1996-10-21 | Sealed battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8278386A JPH10125304A (en) | 1996-10-21 | 1996-10-21 | Sealed battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10125304A true JPH10125304A (en) | 1998-05-15 |
Family
ID=17596625
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8278386A Pending JPH10125304A (en) | 1996-10-21 | 1996-10-21 | Sealed battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10125304A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6570749B1 (en) | 2000-07-14 | 2003-05-27 | Advanced Battery Technology Ltd | Over-current and thermal protection device |
| US7763375B2 (en) | 2006-05-24 | 2010-07-27 | Eveready Battery Company, Inc. | Current interrupt device for batteries |
| JP2010272389A (en) * | 2009-05-22 | 2010-12-02 | Toyota Motor Corp | Sealed battery |
| EP2618396A1 (en) * | 2007-12-25 | 2013-07-24 | BYD Company Limited | Battery system for a vehicle with severable connections |
| US10381632B2 (en) | 2007-12-25 | 2019-08-13 | Shenzhen Byd Auto R&D Company Limited | Construction of electrochemical storage cell with conductive bridge |
-
1996
- 1996-10-21 JP JP8278386A patent/JPH10125304A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6570749B1 (en) | 2000-07-14 | 2003-05-27 | Advanced Battery Technology Ltd | Over-current and thermal protection device |
| US7763375B2 (en) | 2006-05-24 | 2010-07-27 | Eveready Battery Company, Inc. | Current interrupt device for batteries |
| EP2618396A1 (en) * | 2007-12-25 | 2013-07-24 | BYD Company Limited | Battery system for a vehicle with severable connections |
| US10381632B2 (en) | 2007-12-25 | 2019-08-13 | Shenzhen Byd Auto R&D Company Limited | Construction of electrochemical storage cell with conductive bridge |
| JP2010272389A (en) * | 2009-05-22 | 2010-12-02 | Toyota Motor Corp | Sealed battery |
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