JP2002260631A - Secondary battery - Google Patents
Secondary batteryInfo
- Publication number
- JP2002260631A JP2002260631A JP2001059123A JP2001059123A JP2002260631A JP 2002260631 A JP2002260631 A JP 2002260631A JP 2001059123 A JP2001059123 A JP 2001059123A JP 2001059123 A JP2001059123 A JP 2001059123A JP 2002260631 A JP2002260631 A JP 2002260631A
- Authority
- JP
- Japan
- Prior art keywords
- battery
- terminal member
- terminal
- screw shaft
- thermal fuse
- 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.)
- Granted
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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、電池缶の内部に収
容された巻き取り電極体の発生電力を一対の電極端子部
材から外部負荷に供給することが出来る二次電池に関
し、特に、所定値を越える温度上昇が発生したときに電
流経路を自動的に遮断する、自己復帰不能な温度ヒュー
ズを具えた二次電池に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a secondary battery capable of supplying power generated by a wound electrode body housed in a battery can to an external load from a pair of electrode terminal members, and more particularly to a secondary battery having a predetermined value. The present invention relates to a secondary battery provided with a non-self-recoverable thermal fuse that automatically shuts off a current path when a temperature rise exceeding the maximum temperature occurs.
【０００２】[0002]
【従来の技術】従来、密閉された電池缶の内部に、所定
値を越える温度上昇が発生したときに充放電経路を遮断
する自己復帰不能な温度ヒューズを配備した二次電池が
提案されている(特開平6-325751号)。該二次電池によれ
ば、発熱によって電池の温度が所定値を越えると、温度
ヒューズが作動して、充放電経路を遮断するので、以後
の充放電が強制的に停止されることになる。2. Description of the Related Art Conventionally, there has been proposed a secondary battery in which a non-self-recoverable thermal fuse for interrupting a charging / discharging path when a temperature rise exceeding a predetermined value occurs inside a sealed battery can. (JP-A-6-325575). According to the secondary battery, when the temperature of the battery exceeds a predetermined value due to heat generation, the temperature fuse operates to cut off the charge / discharge path, so that subsequent charge / discharge is forcibly stopped.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、従来の
二次電池においては、温度ヒューズが電池缶の内部に配
備されており、一旦、温度上昇によって作動すると、該
温度ヒューズは自己復帰しないため、充放電経路をリセ
ットするための特別な構成が必要となって、電池の構造
が複雑となるばかりでなく、リセットの操作が困難であ
る問題があった。又、温度ヒューズが作動した時点で、
電池に大きな電力が残存しているときは、該電力を放電
する必要があるが、温度ヒューズが作動した状態では放
電回路を構成することが出来ないため、従来において
は、長時間の放置によって自己放電させる方法が採られ
ており、時間がかかる問題があった。However, in the conventional secondary battery, a thermal fuse is provided inside the battery can, and once activated due to a rise in temperature, the thermal fuse does not return to its original state. A special configuration for resetting the discharge path is required, which not only complicates the structure of the battery but also makes the reset operation difficult. Also, when the thermal fuse is activated,
When a large amount of electric power remains in the battery, it is necessary to discharge the electric power. The method of discharging is adopted, and there is a problem that it takes time.
【０００４】そこで本発明の目的は、充放電経路のリセ
ットが容易であり、然も温度ヒューズの作動時に残存電
力を容易に放電させることが出来る二次電池を提供する
ことである。SUMMARY OF THE INVENTION It is an object of the present invention to provide a secondary battery which can easily reset a charging / discharging path and can easily discharge remaining power when a thermal fuse operates.
【０００５】[0005]
【課題を解決する為の手段】本発明に係る二次電池にお
いては、電池缶(11)の内部に巻き取り電極体(２)が収容
され、電池缶(11)には、巻き取り電極体(２)の発生電力
を外部負荷に供給するための一対の電極端子部材(31)(3
1)が取り付けられている。ここで、電池缶(11)から外部
に突出する少なくとも何れか一方の電極端子部材(31)の
先端部には、所定値を越える温度上昇によって電流経路
を遮断する自己復帰不能な温度ヒューズ(４)が連結され
ている。温度ヒューズ(４)は、第１端子部材(41)と第２
端子部材(42)の間に感温性部材(43)を介在させて構成さ
れ、第１端子部材(41)には電極端子部材(31)へ向けて第
１ねじ軸部(41b)が突設され、該第１ねじ軸部(41b)が電
極端子部材(31)の先端部にねじ込まれている。又、第２
端子部材(42)には、第１ねじ軸部とは逆方向に第２ねじ
軸部(42b)が突設され、該第２ねじ軸部(42b)に対して、
外部負荷との接続に用いる端子片(51)が連結されると共
に接続用ナット(６)が螺合し、該接続用ナット(６)の締
め付けによって端子片(51)が第２端子部材(42)に固定さ
れている。In a secondary battery according to the present invention, a wound electrode body (2) is housed inside a battery can (11), and the battery can (11) has a wound electrode body. A pair of electrode terminal members (31) and (3) for supplying the generated power of (2) to an external load.
1) is installed. Here, at the tip of at least one of the electrode terminal members (31) protruding outside from the battery can (11), a non-self-recoverable temperature fuse (4) for interrupting a current path due to a temperature rise exceeding a predetermined value. ) Are connected. The thermal fuse (4) is connected to the first terminal member (41) and the second terminal member (41).
A temperature-sensitive member (43) is interposed between the terminal members (42), and the first terminal member (41) has a first screw shaft (41b) projecting toward the electrode terminal member (31). The first screw shaft (41b) is screwed into the tip of the electrode terminal member (31). Also, the second
The terminal member (42) is provided with a second screw shaft (42b) protruding in a direction opposite to the first screw shaft, and the second screw shaft (42b)
The terminal strip (51) used for connection to an external load is connected, and the connection nut (6) is screwed. By tightening the connection nut (6), the terminal strip (51) is connected to the second terminal member (42). ) Is fixed.
【０００６】上記本発明の二次電池においては、所定値
を越える温度上昇が発生したとき、温度ヒューズ(４)の
感温性部材(43)が変形して、第１端子部材(41)と第２端
子部材(42)の間の電気的導通を切り離す。これによっ
て、電極端子部材(31)から端子片(51)へ至る充放電経路
が強制的に遮断されることになる。温度ヒューズ(４)の
作動後、二次電池の残存電力を放電させる場合には、該
温度ヒューズ(４)の第１端子部材(41)に放電回路を接続
すればよい。又、充放電経路をリセットする際は、作動
状態の温度ヒューズ(４)を電極端子部材(31)から取り外
し、未作動状態の温度ヒューズと交換すればよく、その
作業は容易である。In the above secondary battery of the present invention, when a temperature rise exceeding a predetermined value occurs, the temperature-sensitive member (43) of the thermal fuse (4) is deformed and the first terminal member (41) is deformed. The electrical continuity between the second terminal members (42) is cut off. As a result, the charge / discharge path from the electrode terminal member (31) to the terminal strip (51) is forcibly cut off. In order to discharge the remaining power of the secondary battery after the operation of the thermal fuse (4), a discharge circuit may be connected to the first terminal member (41) of the thermal fuse (4). When resetting the charging / discharging path, the operating temperature fuse (4) may be removed from the electrode terminal member (31) and replaced with a non-operating temperature fuse, which is easy.
【０００７】又、上記本発明の二次電池においては、温
度ヒューズ(４)が、第１端子部材(41)と第２端子部材(4
2)にそれぞれ第１ねじ軸部(41b)と第２ねじ軸部(42b)を
突設した構成を有しているので、従来構造の電極端子部
材(31)に大きな改変を加えることなく、第１端子部材(4
1)のねじ軸部(41b)を電極端子部材(31)の先端部に連結
することが可能であると共に、第２端子部材(42)のねじ
軸部(42b)に対し、従来と同様に接続用ナット(６)を螺
合せしめて、電力取出し用の端子片(51)を固定すること
が可能である。In the secondary battery according to the present invention, the temperature fuse (4) includes the first terminal member (41) and the second terminal member (4).
2) has a configuration in which the first screw shaft portion (41b) and the second screw shaft portion (42b) are protruded, respectively, so that the electrode terminal member (31) having the conventional structure is not greatly modified. First terminal member (4
The screw shaft part (41b) of 1) can be connected to the tip of the electrode terminal member (31), and the screw shaft part (42b) of the second terminal member (42) can be It is possible to fix the terminal strip (51) for power extraction by screwing the connection nut (6).
【０００８】具体的構成において、温度ヒューズ(４)の
第１端子部材(41)には、温度ヒューズ(４)の作動時に電
池の残存電力を放電させるために用いる放電用端子片
(５)が連結されている。又、前記放電用端子片(５)に
は、オン／オフ操作可能な放電スイッチ(７)と放電抵抗
(71)を具えた放電回路が接続されている。該具体的構成
によれば、通常の充放電時には放電スイッチ(７)を開い
ておき、温度ヒューズ(４)の作動時に、放電スイッチ
(７)を閉じる。これによって、放電回路が動作し、放電
抵抗(71)によって巻き取り電極体(２)の残存電力が短時
間で消費される。In a specific configuration, a first terminal member (41) of the thermal fuse (4) has a discharge terminal piece used for discharging the remaining power of the battery when the thermal fuse (4) operates.
(5) is connected. The discharge terminal piece (5) has a discharge switch (7) that can be turned on / off and a discharge resistance.
A discharge circuit having (71) is connected. According to this specific configuration, the discharge switch (7) is opened during normal charging and discharging, and the discharge switch (7) is opened when the temperature fuse (4) is activated.
Close (7). As a result, the discharge circuit operates, and the remaining power of the winding electrode body (2) is consumed in a short time by the discharge resistor (71).
【０００９】[0009]
【発明の効果】本発明に係る二次電池によれば、温度ヒ
ューズ作動後に充放電経路をリセットする操作が容易で
あり、然も、温度ヒューズの作動時に残存している電力
を容易に放電させることが可能である。According to the secondary battery of the present invention, the operation of resetting the charge / discharge path after the operation of the thermal fuse is easy, and the electric power remaining when the thermal fuse is activated is easily discharged. It is possible.
【００１０】[0010]
【発明の実施の形態】以下、本発明をリチウム二次電池
に実施した形態につき、図面に沿って具体的に説明す
る。本発明に係るリチウム二次電池は、図１及び図２に
示す如く、円筒型の電池本体(１)を具え、該電池本体
(１)には、正負一対の電極端子機構(３)(３)が取り付け
られており、これらの電極端子機構(３)(３)から外部に
電力を取り出すことが可能である。DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention applied to a lithium secondary battery will be specifically described with reference to the drawings. As shown in FIGS. 1 and 2, the lithium secondary battery according to the present invention includes a cylindrical battery body (1).
A pair of positive and negative electrode terminal mechanisms (3) and (3) are attached to (1), and it is possible to extract electric power from these electrode terminal mechanisms (3) and (3) to the outside.
【００１１】電池本体(１)は、図３に示す如く、筒体(1
2)の開口部に蓋体(13)を固定してなる電池缶(11)の内部
に、巻き取り電極体(２)を収容して構成されており、蓋
体(13)には、電池缶(11)内部の圧力が所定値を上回った
ときに開放するガス排出弁(14)が取り付けられている。
又、蓋体(13)には、図２に示す如く、電池缶(11)の内部
に電解液を注入するために用いた注液孔を塞ぐ封口栓(1
5)がねじ込まれている。As shown in FIG. 3, the battery body (1) has a cylindrical body (1).
The wound electrode body (2) is housed inside a battery can (11) in which a lid (13) is fixed to the opening of (2). The lid (13) has a battery A gas discharge valve (14) that opens when the pressure inside the can (11) exceeds a predetermined value is attached.
As shown in FIG. 2, the lid (13) has a sealing plug (1) for closing an injection hole used for injecting the electrolyte into the battery can (11).
5) is screwed.
【００１２】電極端子機構(３)は、図３に示す如く、蓋
体(13)の貫通孔に取り付けられた電極端子部材(31)を具
え、該貫通孔と電極端子部材(31)の間には、絶縁部材(3
3)が介在している。電極端子部材(31)は、電池缶(11)の
内部に鍔部(34)を具えると共に、電池缶(11)の外部へ向
けて突出するねじ軸部(31a)を具えており、該ねじ軸部
(31a)にナット(35)を螺合せしめて、電極端子部材(31)
を蓋体(13)に固定している。又、電極端子部材(31)の鍔
部(34)には、巻き取り電極体(２)から伸びる複数本の集
電タブ(21)が連結されて、巻き取り電極体(２)と電極端
子部材(31)の間の電気的導通がとられている。As shown in FIG. 3, the electrode terminal mechanism (3) includes an electrode terminal member (31) attached to a through hole of the lid (13), and a gap between the through hole and the electrode terminal member (31). Insulation material (3
3) is interposed. The electrode terminal member (31) includes a flange portion (34) inside the battery can (11) and a screw shaft portion (31a) protruding to the outside of the battery can (11). Screw shaft
Nut (35) is screwed into (31a), and electrode terminal member (31)
Is fixed to the lid (13). Further, a plurality of current collecting tabs (21) extending from the winding electrode body (2) are connected to the flange portion (34) of the electrode terminal member (31), and the winding electrode body (2) and the electrode terminal are connected. Electrical continuity is established between the members (31).
【００１３】図２に示す如く、正負一対の電極端子機構
(３)(３)の内、一方の電極端子機構(３)の電極端子部材
(31)には、所定値を越える温度上昇によって電流経路を
遮断する自己復帰不能な温度ヒューズ(４)がねじ込まれ
る。温度ヒューズ(４)は、図４及び図５に示す如く、第
１端子部材(41)及び第２端子部材(42)の間に感温性部材
(43)を介在させ、これらを円筒状の絶縁部材(44)によっ
て連結し、更にその周囲を金属リング(45)によって包囲
したものであり、金属リング(45)の両端部をかしめ固定
することによって、一体の温度ヒューズ(４)を構成して
いる。第１端子部材(41)及び第２端子部材(42)はそれぞ
れ、円板部(41a)(42a)の表面にねじ軸部(41b)(42b)を互
いに逆方向に突設したものである。又、感温性部材(43)
は形状記憶合金製であって、平板部(43a)及び切り起こ
し部(43b)から構成され、所定温度以下では、平板部(43
a)が第１端子部材(41)に接触すると共に、切り起こし部
(43b)の先端が第２端子部材(42)に接触して、第１端子
部材(41)と第２端子部材(42)の電気的導通を維持してい
るが、所定温度を越えると、切り起こし部(43b)が変形
して第２端子部材(42)から離間し、第１端子部材(41)と
第２端子部材(42)の電気的導通を遮断するものである。
尚、該感温性部材(43)は、温度が所定値以下に戻ったと
しても、自己復帰はしない。As shown in FIG. 2, a pair of positive and negative electrode terminal mechanisms is provided.
(3) An electrode terminal member of one of the electrode terminal mechanisms (3) out of (3).
In (31), a non-self-recoverable thermal fuse (4) for interrupting a current path due to a temperature rise exceeding a predetermined value is screwed. As shown in FIGS. 4 and 5, a thermal fuse (4) is provided between a first terminal member (41) and a second terminal member (42).
(43), these are connected by a cylindrical insulating member (44), and the periphery thereof is further surrounded by a metal ring (45), and both ends of the metal ring (45) are fixed by caulking. Thus, an integral thermal fuse (4) is formed. The first terminal member (41) and the second terminal member (42) are respectively formed by projecting screw shaft portions (41b) (42b) on the surfaces of the disk portions (41a) (42a) in opposite directions. . Also, temperature-sensitive member (43)
Is made of a shape memory alloy and includes a flat plate portion (43a) and a cut-and-raised portion (43b).
a) comes into contact with the first terminal member (41), and
The tip of (43b) comes into contact with the second terminal member (42) to maintain electrical continuity between the first terminal member (41) and the second terminal member (42). The cut-and-raised portion (43b) is deformed and separated from the second terminal member (42), and cuts off electrical conduction between the first terminal member (41) and the second terminal member (42).
Note that the temperature-sensitive member (43) does not return to itself even if the temperature returns to a predetermined value or less.
【００１４】図２及び図４に示す如く、温度ヒューズ
(４)の第１端子部材(41)のねじ軸部(41b)には、ワイヤ
ー(53)が接続されたリング状の放電用端子片(５)が係合
し、該ねじ軸部(41b)は、電極端子部材(31)の先端部に
凹設されたねじ穴(31a)にねじ込まれる。又、温度ヒュ
ーズ(４)の第２端子部材(42)のねじ軸部(42b)には、ワ
イヤー(54)が接続された電力取り出し用端子片(51)が係
合すると共に、接続用ナット(６)が螺合する。尚、温度
ヒューズ(４)の金属リング(45)の表面には、絶縁フィル
ム(図示省略)が貼り付けられており、放電用端子片(５)
と電力取り出し用端子片(51)との間には、感温性部材(4
3)を通じてのみ電気的導通が得られる様にしている。更
に、図２に示す如く、他方の電極端子機構(３)の電極端
子部材(31)のねじ軸部(31a)には、ワイヤー(55)が接続
された電力取出し用端子片(52)が係合すると共に、接続
用ナット(61)が螺合する。As shown in FIG. 2 and FIG.
A ring-shaped discharge terminal piece (5) to which a wire (53) is connected is engaged with the screw shaft (41b) of the first terminal member (41) of (4). ) Is screwed into a screw hole (31a) formed in the tip of the electrode terminal member (31). A power extraction terminal piece (51) to which a wire (54) is connected is engaged with a screw shaft (42b) of a second terminal member (42) of the thermal fuse (4), and a connection nut is provided. (6) is screwed. An insulating film (not shown) is attached to the surface of the metal ring (45) of the thermal fuse (4), and the discharge terminal strip (5)
Between the temperature-sensitive member (4)
Electrical conduction is obtained only through 3). Further, as shown in FIG. 2, a power extraction terminal piece (52) to which a wire (55) is connected is provided on the screw shaft portion (31a) of the electrode terminal member (31) of the other electrode terminal mechanism (3). At the same time, the connection nut (61) is screwed.
【００１５】図１に示す様に、一方の電極端子機構(３)
に取り付けられた放電用端子片(５)から伸びるワイヤー
(53)は、電流遮断素子(72)、放電スイッチ(７)及び放電
抵抗(71)を介して、他方の電極端子機構(３)に取り付け
られた電力取出し用端子片(52)から伸びるワイヤー(55)
と連結されて、温度ヒューズ(４)が作動したときの残存
電力を放電するための放電回路が形成されている。尚、
電流遮断素子(72)は、放電回路を流れる電流が所定の閾
値(０.２５Ｃ)を越えたときに電流経路を遮断するヒュ
ーズ、若しくは正の温度係数を有するＰＴＣ素子から構
成される。As shown in FIG. 1, one electrode terminal mechanism (3)
Wire extending from the discharge terminal strip (5) attached to the
(53) is a wire extending from a power take-off terminal piece (52) attached to the other electrode terminal mechanism (3) via a current interrupting element (72), a discharge switch (7) and a discharge resistor (71). (55)
And a discharge circuit for discharging remaining power when the thermal fuse (4) is activated. still,
The current interrupting element (72) is constituted by a fuse for interrupting the current path when the current flowing through the discharge circuit exceeds a predetermined threshold (0.25C) or a PTC element having a positive temperature coefficient.
【００１６】更に図６は、電池本体(１)から外部負荷
(８)へ電力を供給し、或いは充電器(81)によって電池本
体(１)を充電するための充放電回路を、一対の電力取出
し用端子片(51)(52)に接続した状態を表わしており、該
充放電回路には、電力供給時に閉じるべき給電スイッチ
(82)と、充電時に閉じるべき充電スイッチ(83)が介在し
ている。又、放電用端子片(５)と電力取出し用端子片(5
2)に接続された放電回路に対して並列に、両端子片(５)
(52)間の電圧をモニターするための電圧モニター(73)が
接続されている。Further, FIG. 6 shows a state in which an external load is applied from the battery body (1).
(8) A state in which a charge / discharge circuit for supplying power to the battery or charging the battery body (1) by the charger (81) is connected to the pair of power extraction terminal strips (51) and (52). The charging / discharging circuit includes a power supply switch to be closed when power is supplied.
(82) and a charge switch (83) to be closed during charging. Also, the discharge terminal strip (5) and the power extraction terminal strip (5
In parallel with the discharge circuit connected to 2), both terminal strips (5)
A voltage monitor (73) for monitoring the voltage between (52) is connected.
【００１７】上記本発明のリチウム二次電池において
は、電池本体(１)から負荷(８)に電力を供給し、或いは
充電器(81)によって電池本体(１)を充電している過程
で、電池本体(１)の温度が所定値を越えて上昇したと
き、温度ヒューズ(４)が作動して、充放電回路が強制的
に開かれることになる。この状態で、放電回路の放電ス
イッチ(７)を閉じることにより、電池本体(１)に残存し
ている電力が放電抵抗(71)によって消費される。In the lithium secondary battery of the present invention, during the process of supplying power from the battery body (1) to the load (8) or charging the battery body (1) by the charger (81), When the temperature of the battery body (1) rises above a predetermined value, the temperature fuse (4) operates and the charge / discharge circuit is forcibly opened. In this state, by closing the discharge switch (7) of the discharge circuit, the electric power remaining in the battery body (1) is consumed by the discharge resistor (71).
【００１８】[0018]
【実施例】上記本発明のリチウム二次電池(本発明電池)
を実際に作製して、その動作を確認した。DESCRIPTION OF THE PREFERRED EMBODIMENTS The above-mentioned lithium secondary battery of the present invention (battery of the present invention)
Was actually fabricated and its operation was confirmed.
【００１９】先ず、本発明電池の電池本体(１)の製造方
法について説明する。 〔正極の作製〕正極活物質としてのＬｉＮｉ０．７Ｃｏ
０．３Ｏ２と導電剤としての炭素を、重量比９０：５で
混合して、正極合剤を作製した。次に、結着剤であるポ
リフッ化ビニリデンをＮ−メチル−２−ピロリドン（Ｎ
ＭＰ）に溶解させて、ＮＭＰ溶液を調製した。そして、
正極合剤とポリフッ化ビニリデンの重量比が９５：５に
なる様に、正極合剤とＮＭＰ溶液を混練してスラリーを
調製した。このスラリーを正極集電体としてのアルミニ
ウム箔の両面にドクターブレード法により塗布し、１５
０℃で２時間の真空乾燥を施して、正極を得た。First, a method of manufacturing the battery body (1) of the battery of the present invention will be described. [Preparation of positive electrode] LiNi 0.7 Co as positive electrode active material
0.3 O 2 and carbon as a conductive agent were mixed at a weight ratio of 90: 5 to prepare a positive electrode mixture. Next, polyvinylidene fluoride as a binder was replaced with N-methyl-2-pyrrolidone (N
MP) to prepare an NMP solution. And
The slurry was prepared by kneading the positive electrode mixture and the NMP solution so that the weight ratio of the positive electrode mixture to polyvinylidene fluoride was 95: 5. This slurry was applied to both sides of an aluminum foil as a positive electrode current collector by a doctor blade method,
Vacuum drying was performed at 0 ° C. for 2 hours to obtain a positive electrode.
【００２０】〔負極の作製〕結着剤であるポリフッ化ビ
ニリデンをＮＭＰに溶解させて、ＮＭＰ溶液を調製し
た。そして、黒鉛粉末とハードカーボン粉末を重量比
４：１で混合した粉末とポリフッ化ビニリデンの重量比
が９５：５になる様に、粉末とＮＭＰ溶液とを混練して
スラリーを調製した。このスラリーを負極集電体として
の銅箔の両面にドクターブレード法により塗布し、１５
０℃で２時間の真空乾燥を施して、負極を得た。[Preparation of Negative Electrode] NMP solution was prepared by dissolving polyvinylidene fluoride as a binder in NMP. Then, a slurry was prepared by kneading the powder and the NMP solution so that the weight ratio of the powder obtained by mixing the graphite powder and the hard carbon powder at a weight ratio of 4: 1 and polyvinylidene fluoride was 95: 5. This slurry was applied to both sides of a copper foil as a negative electrode current collector by a doctor blade method,
Vacuum drying was performed at 0 ° C. for 2 hours to obtain a negative electrode.
【００２１】〔電解液の調製〕エチレンカーボネートと
ジエチルカーボネートを体積比１：１で混合した溶媒
に、ＬｉＰＦ６を１ｍｏｌ／ｌの割合で溶解して、電解
液を調製した。[Preparation of Electrolyte Solution] LiPF 6 was dissolved at a ratio of 1 mol / l in a solvent in which ethylene carbonate and diethyl carbonate were mixed at a volume ratio of 1: 1 to prepare an electrolyte solution.
【００２２】〔電池の組立〕正極に対してアルミニウム
製の複数本の集電タブを接続すると共に、負極に対して
銅製の複数本の集電タブを接続した後、正極と負極の間
にセパレータを介在させてこれらを渦巻き状に巻き取っ
て、巻き取り電極体を作製した。尚、セパレータとして
は、イオン透過性のポリエチレン製の微多孔膜を用い
た。[Assembly of Battery] After connecting a plurality of current collecting tabs made of aluminum to the positive electrode and connecting a plurality of current collecting tabs made of copper to the negative electrode, a separator is provided between the positive electrode and the negative electrode. These were spirally wound with the intermediary of to prepare a wound electrode body. In addition, an ion-permeable polyethylene microporous membrane was used as the separator.
【００２３】一方、外径４２.５ｍｍ、高さ１５０ｍ
ｍ、厚さ０.５ｍｍの金属製筒体と、直径４２.５ｍｍ、
厚さ２ｍｍの一対の金属製蓋体とを作製し、両蓋体にそ
れぞれ電極端子機構を取り付けた。そして、巻き取り電
極を筒体の内部に収容して、該巻き取り電極体の両極か
ら伸びる集電タブをそれぞれ電極端子機構に接続した
後、各蓋体を筒体の開口縁に溶接し、内部に電解液を注
入して、電池本体を組み立てた。On the other hand, the outer diameter is 42.5 mm and the height is 150 m
m, a metal cylinder having a thickness of 0.5 mm, a diameter of 42.5 mm,
A pair of metal lids having a thickness of 2 mm were prepared, and electrode terminal mechanisms were attached to both lids. Then, the winding electrode is housed inside the cylindrical body, and the current collecting tabs extending from both poles of the winding electrode body are respectively connected to the electrode terminal mechanisms, and then each lid is welded to an opening edge of the cylindrical body, An electrolyte was injected into the inside to assemble the battery body.
【００２４】その後、図１の如く、一方(正極側)の電極
端子機構(３)の電極端子部材(31)に温度ヒューズ(４)を
ねじ込んで固定すると共に、放電用端子片(５)と一対の
電力取出し用端子片(51)(52)を取り付けた。尚、温度ヒ
ューズ(４)としては、作動温度が５０℃のものを採用し
た。Thereafter, as shown in FIG. 1, a temperature fuse (4) is screwed into an electrode terminal member (31) of one (positive electrode side) electrode terminal mechanism (3), and the electrode terminal member (31) is fixed to the discharge terminal piece (5). A pair of power extraction terminal strips (51) and (52) were attached. As the thermal fuse (4), one having an operating temperature of 50 ° C. was used.
【００２５】一方、放電用端子片(５)に放電回路が接続
されていないこと以外は上記本発明電池と同様にして、
比較例電池を作製し、本発明電池と比較例電池につい
て、以下の動作確認試験を行なった。On the other hand, except that the discharging circuit is not connected to the discharging terminal piece (5), the same as the battery of the present invention,
A battery of the comparative example was manufactured, and the following operation confirmation test was performed on the battery of the present invention and the battery of the comparative example.
【００２６】先ず、電池の容量を確認した。そして、充
電電流１.８７５Ａで８時間の充電を行なった後、放電
電流１.８７５Ａで放電終止電圧２.７Ｖまで放電を行な
った。この結果、電池の放電容量は、本発明電池及び比
較例電池ともに１５Ａｈであった。尚、電池の表面温度
を把握するため、電池缶の表面に温度センサーを取り付
けて、電池温度を常時モニターした。First, the capacity of the battery was confirmed. After charging for 8 hours at a charging current of 1.875 A, the battery was discharged to a discharge end voltage of 2.7 V at a discharging current of 1.875 A. As a result, the discharge capacity of the battery of the present invention and that of the battery of the comparative example were 15 Ah. In order to grasp the surface temperature of the battery, a temperature sensor was attached to the surface of the battery can to constantly monitor the battery temperature.
【００２７】次に、温度ヒューズの動作試験を行なっ
た。試験では、形状及び熱容量に関して本発明電池及び
比較例電池と同等の２つの模擬電池を作製し、これらの
模擬電池にヒータを巻き付けて、温度ヒューズを取り付
けた端子部の温度が５０℃以上になる様に加熱し、加熱
前後の温度ヒューズの導通（抵抗測定）をテスターで測
定した。その結果、本発明電池及び比較例電池ともに、
温度が５０℃に到達することによって、温度ヒューズが
作動し、充放電回路が遮断されたことを確認した。Next, an operation test of the thermal fuse was performed. In the test, two simulated batteries equivalent in shape and heat capacity to the battery of the present invention and the comparative example battery were produced, and a heater was wound around these simulated batteries, and the temperature of the terminal portion to which the thermal fuse was attached was 50 ° C. or higher Then, conduction (resistance measurement) of the thermal fuse before and after heating was measured by a tester. As a result, both the battery of the present invention and the battery of the comparative example
When the temperature reached 50 ° C., it was confirmed that the thermal fuse was activated and the charge / discharge circuit was cut off.
【００２８】その後、作動後の温度ヒューズを本発明電
池に取り付け、図６に示す電圧モニター(73)が接続され
た放電回路を構成した。この結果、電圧モニター(73)は
電圧表示が可能であって、電池本体(１)からの放電が可
能であることを確認した。又、本発明電池において、両
電力取出し用端子片(51)(52)間の電圧は、充放電回路が
遮断されているために零となり、放電が不能であること
を確認した。Thereafter, a temperature fuse after operation was attached to the battery of the present invention, and a discharge circuit to which a voltage monitor (73) shown in FIG. 6 was connected was formed. As a result, it was confirmed that the voltage monitor (73) was capable of displaying a voltage and was capable of discharging from the battery body (1). In addition, in the battery of the present invention, the voltage between both power extraction terminal strips (51) and (52) became zero because the charge / discharge circuit was shut off, and it was confirmed that discharge was impossible.
【００２９】上述の如く、本発明に係るリチウム二次電
池によれば、電池の温度上昇によって温度ヒューズ(４)
が作動した後に、電池本体(１)に残存していた電力を放
電用端子片(５)に接続した放電回路によって放電させる
ことが可能となる。又、放電回路に配備した放電スイッ
チ(７)を遠隔制御することによって、電池本体(１)から
離れた遠隔位置から残存電力の放電を行なうことが出来
る。更に、温度ヒューズ(４)は、電池缶(11)の外側に配
備されて、電極端子部材(31)の端部にねじ込み固定され
ているに過ぎないので、新しい温度ヒューズと交換する
作業が極めて簡易である。As described above, according to the lithium secondary battery of the present invention, the temperature fuse (4)
After the operation of the battery, the electric power remaining in the battery body (1) can be discharged by the discharge circuit connected to the discharge terminal strip (5). Further, by remotely controlling the discharge switch (7) provided in the discharge circuit, the remaining power can be discharged from a remote position away from the battery body (1). Furthermore, since the thermal fuse (4) is provided outside the battery can (11) and is merely screwed and fixed to the end of the electrode terminal member (31), it is extremely difficult to replace the thermal fuse with a new one. It is simple.
【図１】本発明に係る二次電池の外観を示す正面図であ
る。FIG. 1 is a front view showing the appearance of a secondary battery according to the present invention.
【図２】該二次電池において、電池本体から温度ヒュー
ズを分解した状態を示す斜視図である。FIG. 2 is a perspective view showing a state in which a thermal fuse is disassembled from a battery body in the secondary battery.
【図３】該二次電池の要部を示す断面図である。FIG. 3 is a cross-sectional view showing a main part of the secondary battery.
【図４】温度ヒューズの断面図である。FIG. 4 is a sectional view of a thermal fuse.
【図５】温度ヒューズの分解斜視図である。FIG. 5 is an exploded perspective view of the thermal fuse.
【図６】電池本体に接続された充放電回路及び放電回路
を示す図である。FIG. 6 is a diagram showing a charge / discharge circuit and a discharge circuit connected to a battery body.
(１) 電池本体 (11) 電池缶 (12) 筒体 (13) 蓋体 (２) 巻き取り電極体 (３) 電極端子機構 (31) 電極端子部材 (４) 温度ヒューズ (41) 第１端子部材 (42) 第２端子部材 (43) 感温性部材 (５) 放電用端子片 (51) 電力取出し用端子片 (52) 電力取出し用端子片 (６) 接続用ナット (61) 接続用ナット (７) 放電スイッチ (71) 放電抵抗 (72) 電流遮断素子 (73) 電圧モニター (1) Battery body (11) Battery can (12) Cylindrical body (13) Lid (2) Rewinding electrode body (3) Electrode terminal mechanism (31) Electrode terminal member (4) Thermal fuse (41) First terminal Member (42) 2nd terminal member (43) Temperature sensitive member (5) Discharge terminal strip (51) Power extraction terminal strip (52) Power extraction terminal strip (6) Connection nut (61) Connection nut (7) Discharge switch (71) Discharge resistance (72) Current interrupt device (73) Voltage monitor
───────────────────────────────────────────────────── フロントページの続き (72)発明者 大北 一成 大阪府守口市京阪本通２丁目５番５号 三 洋電機株式会社内 (72)発明者 萩野 秀雄 大阪府守口市京阪本通２丁目５番５号 三 洋電機株式会社内 (72)発明者 能間 俊之 大阪府守口市京阪本通２丁目５番５号 三 洋電機株式会社内 (72)発明者 米津 育郎 大阪府守口市京阪本通２丁目５番５号 三 洋電機株式会社内 Ｆターム(参考） 5G041 BB11 CA02 CD07 5H022 AA09 BB03 CC10 CC12 KK01 5H029 AJ12 AJ14 AK03 AL07 AM03 AM05 AM07 BJ02 BJ14 BJ27 CJ05 DJ05 EJ01 HJ12 HJ14 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kazunari Ohita 2-5-1-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Hideo Hagino 2 Keihanhondori 2, Moriguchi-shi, Osaka 5-5-5 Sanyo Electric Co., Ltd. (72) Inventor Toshiyuki Noma 2-5-5 Sanyo Electric Co., Ltd. 2-5-5 Hondori Sanyo Electric Co., Ltd. F-term (reference) 5G041 BB11 CA02 CD07 5H022 AA09 BB03 CC10 CC12 KK01 5H029 AJ12 AJ14 AK03 AL07 AM03 AM05 AM07 BJ02 BJ14 BJ27 CJ05 DJ05 EJ01 HJ12 HJ14
Claims (3)
が収容され、電池缶(11)には、巻き取り電極体(２)の発
生電力を外部負荷に供給するための一対の電極端子部材
(31)(31)が取り付けられている二次電池において、電池
缶(11)から外部に突出する少なくとも何れか一方の電極
端子部材(31)の先端部には、所定値を越える温度上昇に
よって電流経路を遮断する自己復帰不能な温度ヒューズ
(４)が連結され、該温度ヒューズ(４)は、第１端子部材
(41)と第２端子部材(42)の間に感温性部材(43)を介在さ
せて構成され、第１端子部材(41)には電極端子部材(31)
へ向けて第１ねじ軸部(41b)が突設され、該第１ねじ軸
部(41b)が電極端子部材(31)の先端部にねじ込まれてお
り、第２端子部材(42)には、第１ねじ軸部とは逆方向に
第２ねじ軸部(42b)が突設され、該第２ねじ軸部(42b)に
対し、外部負荷との接続に用いる端子片(51)を固定する
ための接続用ナット(６)が螺合していることを特徴とす
る二次電池。1. A winding electrode body (2) wound inside a battery can (11).
Is housed in the battery can (11), and a pair of electrode terminal members for supplying the generated power of the winding electrode body (2) to an external load.
(31) In the secondary battery to which (31) is attached, the tip of at least one of the electrode terminal members (31) protruding outside from the battery can (11) has a temperature rise exceeding a predetermined value. Non-recoverable thermal fuse that interrupts the current path
(4) is connected, and the thermal fuse (4) is connected to the first terminal member.
(41) and a second terminal member (42) with a temperature-sensitive member (43) interposed therebetween, and the first terminal member (41) has an electrode terminal member (31).
A first screw shaft portion (41b) is protruded toward the first screw shaft portion (41b), and the first screw shaft portion (41b) is screwed into the tip of the electrode terminal member (31). A second screw shaft (42b) protrudes in a direction opposite to the first screw shaft, and a terminal strip (51) used for connection to an external load is fixed to the second screw shaft (42b). A connecting nut (6) for screwing.
は、温度ヒューズ(４)の作動時に残存電力を放電するた
めに用いる放電用端子片(５)が連結されている請求項１
に記載の二次電池。2. A discharge terminal strip (5) for discharging residual power when the thermal fuse (4) is activated is connected to a first terminal member (41) of the thermal fuse (4). Item 1
2. The secondary battery according to 1.
可能な放電スイッチ(７)と放電抵抗(71)を具えた放電回
路が接続されている請求項２に記載の二次電池。3. A secondary circuit according to claim 2, wherein a discharge circuit having an on / off operable discharge switch and a discharge resistor is connected to the discharge terminal strip. battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001059123A JP3685723B2 (en) | 2001-03-02 | 2001-03-02 | Secondary battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001059123A JP3685723B2 (en) | 2001-03-02 | 2001-03-02 | Secondary battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002260631A true JP2002260631A (en) | 2002-09-13 |
| JP3685723B2 JP3685723B2 (en) | 2005-08-24 |
Family
ID=18918739
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001059123A Expired - Fee Related JP3685723B2 (en) | 2001-03-02 | 2001-03-02 | Secondary battery |
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| Country | Link |
|---|---|
| JP (1) | JP3685723B2 (en) |
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| KR100814882B1 (en) | 2006-10-10 | 2008-03-18 | 삼성에스디아이 주식회사 | Rechargeable battery and battery module formed by the rechargeable battery |
| US7910239B2 (en) | 2006-10-10 | 2011-03-22 | Samsung Sdi Co., Ltd. | Rechargeable battery and battery module using the same |
| US8097208B2 (en) | 2009-08-12 | 2012-01-17 | G&W Electric Company | White copper-base alloy |
| JP2012043771A (en) * | 2010-08-16 | 2012-03-01 | Sb Limotive Co Ltd | Rechargeable battery and battery module |
| WO2012048652A1 (en) | 2010-10-16 | 2012-04-19 | Byd Company Limited | Lithium-ion battery |
| JP2013098108A (en) * | 2011-11-04 | 2013-05-20 | Toyota Motor Corp | Secondary battery |
| JP2013101890A (en) * | 2011-11-09 | 2013-05-23 | Toyota Motor Corp | Sealed battery |
| JP2013101889A (en) * | 2011-11-09 | 2013-05-23 | Toyota Motor Corp | Sealed battery and discharge method of the same |
| JP2013140711A (en) * | 2012-01-04 | 2013-07-18 | Toyota Industries Corp | Power storage device and vehicle |
| JP2015069945A (en) * | 2013-09-30 | 2015-04-13 | 株式会社Ｇｓユアサ | Electricity storage element |
| US9065102B2 (en) | 2011-10-14 | 2015-06-23 | Samsung Sdi Co., Ltd. | Rechargeable battery |
| JP2015118756A (en) * | 2013-12-17 | 2015-06-25 | 住友電気工業株式会社 | Molten salt battery |
-
2001
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