JPH0945361A - Secondary battery - Google Patents
Secondary batteryInfo
- Publication number
- JPH0945361A JPH0945361A JP7197544A JP19754495A JPH0945361A JP H0945361 A JPH0945361 A JP H0945361A JP 7197544 A JP7197544 A JP 7197544A JP 19754495 A JP19754495 A JP 19754495A JP H0945361 A JPH0945361 A JP H0945361A
- Authority
- JP
- Japan
- Prior art keywords
- battery
- pressure
- terminals
- positive electrode
- negative electrode
- 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
Landscapes
- Secondary Cells (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、安全性を確保するため
に圧力遮断センサを有する、再充電により再生可能な２
次電池に関する。BACKGROUND OF THE INVENTION This invention relates to a rechargeable and reproducible device having a pressure cut-off sensor for ensuring safety.
Regarding the next battery.
【０００２】[0002]
【従来の技術】この種の２次電池（蓄電池）に充電が完
了しても更に充電を行ったり、規定された電流よりも大
きな電流で充電を行う、あるいは過放電を行うと、２次
電池に異常が生じて２次電池内に気体が発生し、２次電
池内の圧力や温度が上昇し、２次電池の膨張、更には亀
裂による電解液の滲み出しにより、２次電池が組み込ま
れた機器に悪影響を与えることがある。また、これまで
に至らなくとも、このような状態のままで２次電池の使
用を継続すると、前述した２次電池の膨張が進行し、亀
裂や破裂が生じる可能性があり、異常が生じた２次電池
は速やかに使用を止める必要がある。そこで、従来よ
り、この種の２次電池には安全対策が施されており、２
次電池内の圧力の上昇により開き、２次電池内の気体を
排気する安全弁を２次電池に設けるタイプや、その温度
上昇を検知して２次電池が接続する電気回路に電流を流
さなくする手段を２次電池外に設けたタイプなどがあ
る。2. Description of the Related Art If a secondary battery (storage battery) of this kind is further charged, or if it is charged with a current larger than a specified current, or if it is over-discharged, the secondary battery is recharged. Abnormalities occur, gas is generated in the secondary battery, the pressure and temperature inside the secondary battery rise, the secondary battery expands, and the electrolyte leaks out due to cracks, so the secondary battery is installed. May adversely affect the equipment. Further, even if it has not been achieved so far, if the secondary battery is continuously used in such a state, expansion of the secondary battery described above may progress, cracks or ruptures may occur, and an abnormality occurs. It is necessary to stop using the secondary battery immediately. Therefore, safety measures have conventionally been taken for this type of secondary battery.
A type that has a safety valve in the secondary battery that opens when the pressure in the secondary battery rises and exhausts the gas in the secondary battery, and detects the temperature rise and stops the flow of current in the electrical circuit connected to the secondary battery. There is a type in which the means is provided outside the secondary battery.
【０００３】例えば、特開平２−２８８０６３号公報の
技術を図４に示してある。図４(a),(b)は従来の２次電
池の概略を示し、(a)は破断前の状態、(b)は破断後の状
態を示す説明図である。For example, the technique disclosed in Japanese Patent Laid-Open No. 288063/1990 is shown in FIG. 4 (a) and 4 (b) are schematic views of a conventional secondary battery, FIG. 4 (a) is an explanatory diagram showing a state before fracture, and FIG. 4 (b) is an explanatory diagram showing a state after fracture.
【０００４】図４に示すように、従来の２次電池は、電
池内圧の上昇に伴って変形する金属性の安全弁４３と、
この安全弁４３に設けた中央突起部４３ａに接続された
リード４５と、安全弁４３の変形に伴って安全弁４３か
ら剥離又は破断を行うリードストリッパ板４６と、安全
弁４３とリードストリッパ板４６を絶縁する絶縁板４７
を具備している。安全弁４３は電池ケース４１に絶縁性
のガスケット４２を介して、正極端子を兼ねる電池蓋４
４とともにかしめられて閉塞して固定される。絶縁板４
７は一体化して設けられた額部４７ｃを有し、その額部
４７ｃによって絶縁板４７は安全弁４３の下に取り付け
られる。リードストリッパ板４６は、その額部４７ｃに
設けられた溝に嵌め込むことによって絶縁板４７の真ぐ
下に隣接して取り付けられる。中央突起部４３ａは絶縁
板４７とリードストリッパ板４６に連通した穴４７ａ及
び４６ａに挿通され、その先端部にリード４５が接続さ
れる。リードストリッパ板４６とそれを固定する額部４
７ｃの間には、部分的に額部４７ｃがえぐられて隙間４
７ｄが設けられている。この隙間４７ｄと連通するよう
に絶縁板４７に穴４７ｂが設けられている。４８は中空
の巻芯、４９は巻芯４８に正極及び負極を巻回されて構
成された発電部である。なお、発電部４９の負極と外部
負極（電池ケース）４１とは図示しないリードで接続さ
れている。この発電部４９は酸化リチウムコバルトから
なる正極、カーボンからなる負極、正極と負極のショー
トを防止するセパレータが組み込まれており、また、負
極はセパレータを挟んで正極と対向するように設けられ
ている。さらに、この電池ケース４１の内部は電解液
（図示せず）で満たされている。As shown in FIG. 4, the conventional secondary battery has a metallic safety valve 43 that deforms as the internal pressure of the battery rises.
The lead 45 connected to the central protrusion 43a provided on the safety valve 43, the lead stripper plate 46 that peels or breaks from the safety valve 43 due to the deformation of the safety valve 43, and the insulation that insulates the safety valve 43 and the lead stripper plate 46 from each other. Board 47
Is provided. The safety valve 43 is provided on the battery case 41 via an insulating gasket 42, and the battery lid 4 also serves as a positive electrode terminal.
It is crimped together with 4, and is closed and fixed. Insulation plate 4
7 has an integrally provided forehead portion 47c, and the insulating plate 47 is attached below the safety valve 43 by the forehead portion 47c. The lead stripper plate 46 is attached immediately below the insulating plate 47 by being fitted in a groove provided in the forehead portion 47c. The central protrusion 43a is inserted into holes 47a and 46a communicating with the insulating plate 47 and the lead stripper plate 46, and the lead 45 is connected to the tip portion thereof. Lead stripper plate 46 and forehead part 4 for fixing it
Between the 7c, the forehead part 47c is partially scooped out and the gap 4 is formed.
7d is provided. A hole 47b is provided in the insulating plate 47 so as to communicate with the gap 47d. Reference numeral 48 is a hollow winding core, and 49 is a power generation unit configured by winding a positive electrode and a negative electrode around the winding core 48. The negative electrode of the power generation unit 49 and the external negative electrode (battery case) 41 are connected by a lead (not shown). The power generation unit 49 incorporates a positive electrode made of lithium cobalt oxide, a negative electrode made of carbon, and a separator for preventing a short circuit between the positive electrode and the negative electrode, and the negative electrode is provided so as to face the positive electrode with the separator interposed therebetween. . Further, the inside of the battery case 41 is filled with an electrolytic solution (not shown).
【０００５】このような従来の２次電池は、発電要素の
異常な化学変化により、発電部の圧力が上昇すると、気
体は、主に図４（ｂ）内の矢印で示すように、隙間４７
ｄ及び穴４７ｂを通って流れ、圧力が安全弁４３に伝え
られ安全弁４３は図４（ｂ）に示すように持ち上げられ
るとともに、リードストリッパ板４６によって剥離又は
破断される。そして、さらに圧力が増してそれが所定の
圧力に達すると、安全弁４３の肉薄部４３ｂが破れ、気
体が電池蓋４４の穴４４ａを通して外に開放される。In such a conventional secondary battery, when the pressure of the power generation section rises due to an abnormal chemical change of the power generation element, the gas is mainly separated by a gap 47 as shown by an arrow in FIG. 4 (b).
Flowing through d and the hole 47b, pressure is transmitted to the safety valve 43, and the safety valve 43 is lifted as shown in FIG. 4 (b), and is peeled or broken by the reed stripper plate 46. Then, when the pressure further increases and reaches a predetermined pressure, the thin portion 43b of the safety valve 43 breaks, and the gas is released to the outside through the hole 44a of the battery lid 44.
【０００６】[0006]
【発明が解決しようとする課題】しかしながら、前記従
来の装置では、２次電池の上部に圧力遮断センサを配置
していたので、その分、２次電池の外形寸法、特に高さ
寸法が高くなってしまい、２次電池の小型化、あるいは
高電池容量化の障害となっていた。However, in the above-mentioned conventional device, since the pressure cutoff sensor is arranged on the upper part of the secondary battery, the external dimension of the secondary battery, especially the height dimension, is increased accordingly. This has been a hindrance to miniaturization of secondary batteries or high battery capacity.
【０００７】本発明の第１の目的は、従来デッドスペー
スであった電池巻芯の中に圧力遮断センサを入れること
で、同じ外形寸法であれば電池容量を高めることがで
き、若しくは電池容量を同じくする場合は小型化を図
れ、また、圧力遮断センサの接続を正極側だけでなく、
負極側での対応もでき、電池の設計の自由度を増すこと
ができる２次電池を提供することにある。A first object of the present invention is to increase the battery capacity with the same outer dimensions by inserting the pressure cutoff sensor in the battery core, which has been a dead space in the past, or to increase the battery capacity. In the case of the same, downsizing can be achieved, and the pressure cutoff sensor is connected not only on the positive electrode side,
It is an object of the present invention to provide a secondary battery capable of dealing with the negative electrode side and increasing the degree of freedom in battery design.
【０００８】本発明の第２の目的は、構造が単純で、か
つ電池巻芯部分に配置することができ、かつ電池巻芯か
らの端子の接続が容易であり、また、破断部材（導電
路）の遮断が行われても、電池内部ガスのアーク等によ
る爆発の虞れがない２次電池を提供することにある。A second object of the present invention is that the structure is simple, it can be arranged in the battery core portion, the terminal can be easily connected from the battery core, and the breaking member (conducting path). (2) It is intended to provide a secondary battery in which there is no risk of explosion due to arcing of gas inside the battery even if the shutoff is performed.
【０００９】[0009]
【課題を解決するための手段】前記第１の目的は、電池
ケース内に、電池巻芯に正極と負極を巻回して発電部を
構成すると共に、前記発電部の内部正極と外部正極を結
ぶ導電路中か、あるいは内部負極と電池ケース等の外部
負極を結ぶ導電路中の少なくとも一方に、２つの端子を
有し、前記端子の一方を前記外部正極あるいは外部負極
に接続し、前記端子の他方を前記内部正極あるいは内部
負極に接続し、通常は前記両端子間を導通させ、電池内
部圧力が設定値以上になると、前記両端子間の導通を遮
断する破断部材とを設けた圧力遮断センサを備え、前記
電池巻芯の中空部内に若しくは電池巻芯に代えて電池巻
芯として前記圧力遮断センサを配設した第１の手段によ
り達成される。The first object is to construct a power generation part by winding a positive electrode and a negative electrode around a battery core in a battery case, and to connect an internal positive electrode and an external positive electrode of the power generation part. At least one of a conductive path or a conductive path connecting an internal negative electrode and an external negative electrode such as a battery case has two terminals, and one of the terminals is connected to the external positive electrode or the external negative electrode. A pressure cutoff sensor provided with a breaking member that connects the other to the internal positive electrode or the internal negative electrode, normally conducts between the terminals, and interrupts conduction between the terminals when the battery internal pressure is equal to or higher than a set value. And the pressure cut-off sensor is provided as a battery core in the hollow portion of the battery core or in place of the battery core.
【００１０】前記第２の目的は、第１の手段おいて、前
記圧力遮断センサは、内部に前記破断部材を収納し、電
池内部圧力により撓んで前記破断部材を押圧する受圧
部、及び前記破断部材の一端部を保持する保持部を有す
る密閉部材と、導電路を有し、前記保持部により片持ち
支持されるとともに、所定値を越える圧力を受けると、
前記密閉部材の受圧部により押し曲げられて該導電路を
遮断させられる破断部材と、前記導電路の端部にそれぞ
れ接続され、あるいは一体に、同一方向に前記密閉部材
の外部へ延設された一対の端子とを具備した第２の手段
により達成される。The second object of the first means is that, in the first means, the pressure cutoff sensor accommodates the breaking member therein, and the pressure receiving portion bends by the internal pressure of the battery to press the breaking member, and the breaking member. A sealing member having a holding portion that holds one end of the member, and a conductive path, cantilevered by the holding portion, and when a pressure exceeding a predetermined value is received,
A breaking member that is pressed and bent by the pressure receiving portion of the sealing member to interrupt the conductive path, and is connected to the end of the conductive path, respectively, or integrally extended to the outside of the sealing member in the same direction. This is achieved by the second means including a pair of terminals.
【００１１】[0011]
【作用】前記第１の手段にあっては、従来デッドスペー
スであった電池巻芯の中に圧力遮断センサを入れること
で、従来、電池の上方に占めていた圧力遮断センサ及び
圧力遮断センサ取付部材のスペースが必要なくなってそ
のスペースを電池の電極の増設に回せるので、同じ外形
寸法であれば電池容量を高めることができ、若しくは電
池容量を同じくする場合は小型化を図れる。また、従来
のような電池蓋近傍でなく電池巻芯部分に圧力遮断セン
サを配設しているので、圧力遮断センサの接続を正極側
（内部正極と外部正極を結ぶ導電路中）だけでなく、負
極側（内部負極と電池ケース等の外部負極を結ぶ導電路
中）での対応もでき、電池の設計の自由度を増すことが
できる。In the first means, the pressure cut-off sensor and the pressure cut-off sensor, which are conventionally occupied above the battery, are installed by inserting the pressure cut-off sensor into the battery core, which is a dead space in the past. Since the space for the members is not needed and the space can be used for the addition of the electrodes of the battery, the battery capacity can be increased with the same outer dimensions, or the size can be reduced when the battery capacity is the same. Also, since the pressure cutoff sensor is arranged not in the vicinity of the battery lid as in the conventional case but in the battery core, the pressure cutoff sensor is connected not only on the positive electrode side (in the conductive path connecting the inner positive electrode and the outer positive electrode). It is also possible to deal with the negative electrode side (in the conductive path connecting the internal negative electrode and the external negative electrode such as the battery case), and it is possible to increase the degree of freedom in battery design.
【００１２】前記第２の手段にあっては、構造が単純
で、かつ電池巻芯部分に配置することができ、かつ電池
巻芯からの端子の接続が容易である。また、破断部材
（導電路）の遮断が密閉された密閉部材内部で行われる
ので、電池内部ガスのアーク等による爆発の虞れがな
い。In the second means, the structure is simple, it can be arranged in the battery core portion, and the connection of the terminal from the battery core is easy. Further, since the breaking member (conductive path) is shut off inside the hermetically sealed member, there is no risk of explosion due to arcing of gas inside the battery.
【００１３】[0013]
【実施例】以下、本発明の実施例を図面に基づいて説明
する。図１(a),(b)は本発明の実施例に係る２次電池の
縦断面図、及びＡ−Ａ線断面図、図２は図１(a)に対応
し、導電路が遮断された状態の断面図、図３は本発明の
実施例に係る２次電池としてリチウムイオン２次電池を
使用した状態の概略を示す説明図である。Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 (a) and 1 (b) are a longitudinal sectional view and a sectional view taken along the line AA of the secondary battery according to the embodiment of the present invention, and FIG. 2 corresponds to FIG. FIG. 3 is a cross-sectional view showing a state in which the lithium ion secondary battery is used as a secondary battery according to an embodiment of the present invention.
【００１４】まず、図１〜図２を参照して圧力遮断セン
サについて説明する。これらの図において、１は圧力遮
断センサで、圧力遮断センサ１は全体として丸棒状で、
破断部材２と、保持体３と、内ケース４と、外ケース５
と、端子６ａ，６ｂから主に構成されている。破断部材
２は、絶縁性の長尺板状のセラミック若しくはＰＰＳ等
の硬質材料からなる基板２ａと、基板２ａの長手方向に
沿って一側面から下端面（説明の都合上、図面上の上下
を便宜的に上下として説明する）そして他側面にＵ字状
に巻回されて接着固定されたアルミ箔からなる導電路
（リード）２ｂと、導電路２ｂの上方の両端部から前記
アルミ箔と一体に引き出された端子６ａ，６ｂとから構
成されている。なお、端子６ａ，６ｂは導電路２ｂと一
体でなく、導電路２ｂを基板２ａに印刷により形成し、
別体の一対の端子を導電路２ｂの両端部に接着固定する
ようにしてもよい。この破断部材２及び端子６ａ，６ｂ
は、保持体３に差し込まれて固定し、片持ち支持されて
いる。First, the pressure cutoff sensor will be described with reference to FIGS. In these figures, 1 is a pressure cutoff sensor, and the pressure cutoff sensor 1 is a round bar as a whole,
Breaking member 2, holder 3, inner case 4, outer case 5
And mainly composed of terminals 6a and 6b. The breaking member 2 includes a substrate 2a made of an insulating long plate-shaped ceramic or a hard material such as PPS, and one side face to a lower end face along the longitudinal direction of the substrate 2a. For the sake of convenience, the upper and lower sides will be described) and a conductive path (lead) 2b made of an aluminum foil wound in a U shape on the other side and fixed by adhesion, and the aluminum foil integrated with the aluminum foil from both ends above the conductive path 2b. It is composed of terminals 6a and 6b which are drawn out. The terminals 6a and 6b are not integrated with the conductive path 2b, and the conductive path 2b is formed on the substrate 2a by printing,
Alternatively, a pair of separate terminals may be adhesively fixed to both ends of the conductive path 2b. The breaking member 2 and the terminals 6a and 6b
Are inserted into the holder 3 and fixed, and are supported in a cantilever manner.
【００１５】保持体３は絶縁性のポリプロピレン樹脂製
で、破断部材２の上端部を嵌合して破断部材２を下方に
突出させている円柱部３ａと、円柱部３ａの上端部に形
成されたフランジ部３ｂと、破断部材２の端子６ａ，６
ｂと、円柱部３ａ及びフランジ部３ｂのほぼ軸心に沿っ
て形成され、破断部材２の基板２ａの一端部が差し込ま
れる破断部材取付穴３ｃと、及び破断部材取付穴３ｃの
内底部に連通し、端子６ａ，６ｂが差し込まれる一対の
端子挿入穴３ｄ，３ｄとから構成されている。したがっ
て、破断部材２は保持体３の下面から垂下されるととも
に、端子６ａ，６ｂは保持体３内を通って保持体３の上
面から引き出されている。The holding body 3 is made of an insulating polypropylene resin, and is formed on the columnar portion 3a into which the upper end portion of the breaking member 2 is fitted so that the breaking member 2 projects downward, and on the upper end portion of the cylindrical portion 3a. Flange 3b and terminals 6a, 6 of the breaking member 2
b, a breaking member mounting hole 3c which is formed substantially along the axis of the cylindrical portion 3a and the flange portion 3b, and into which one end of the substrate 2a of the breaking member 2 is inserted, and the inner bottom portion of the breaking member mounting hole 3c. However, it is composed of a pair of terminal insertion holes 3d, 3d into which the terminals 6a, 6b are inserted. Therefore, the breaking member 2 hangs from the lower surface of the holding body 3, and the terminals 6 a and 6 b pass through the inside of the holding body 3 and are pulled out from the upper surface of the holding body 3.
【００１６】この保持体３には、下方から垂下されてい
る破断部材２を覆うようにして内ケース４が嵌合されて
いる。この内ケース４は有底の円筒状に形成され、その
内部４ａの形状はそのほぼ上半分が保持体３の円柱部３
ａの外形と同様に形成され、その下半分は図１（ｂ）に
示すように、互いに対向しかつ破断部材２の基板２ａの
側面に平行に、平面状の内側面４ｂ，４ｃが形成されて
いる。そして、保持体３下の破断部材２は内ケース４内
の密閉された空間に収納されている。一方の内側面４ｂ
は破断部材２の基板２ａの側面に近接して設けられてい
る。また、一方の内側面４ｂがある内ケース４の外周部
は切り欠かれて切欠き部４ｄが設けられているととも
に、一方の内側面４ｂを構成している部分は薄肉に形成
されて受圧部４ｅが設けられており、受圧部４ｅは高い
外部圧力（電池内部圧力）を受けると内側に撓んで受圧
部４ｅの内側面４ｂが、破断部材２の基板２ａを左方に
押して基板２ａを破断させる。これら保持体３及び内ケ
ース４により密閉部材が構成され、この密閉部材は端子
６ａ，６ｂが引き出される部分が少なくとも絶縁性を有
すればよい。An inner case 4 is fitted to the holder 3 so as to cover the breaking member 2 hanging from below. The inner case 4 is formed in a cylindrical shape having a bottom, and the upper half of the shape of the inside 4a of the inner case 4 is the cylindrical portion 3 of the holder 3.
As shown in FIG. 1 (b), the lower half of the a is formed in the same manner as the outer shape of the a, and the flat inner side surfaces 4 b and 4 c are formed so as to face each other and be parallel to the side surface of the substrate 2 a of the breaking member 2. ing. The breaking member 2 below the holding body 3 is housed in a sealed space inside the inner case 4. One inner surface 4b
Is provided close to the side surface of the substrate 2a of the breaking member 2. Further, the outer peripheral portion of the inner case 4 having the one inner side surface 4b is cut out to form a cutout portion 4d, and the portion forming the one inner side surface 4b is formed thin so that the pressure receiving portion is formed. 4e is provided, the pressure receiving portion 4e bends inward when a high external pressure (battery internal pressure) is received, and the inner side surface 4b of the pressure receiving portion 4e pushes the substrate 2a of the breaking member 2 to the left to break the substrate 2a. Let The holding member 3 and the inner case 4 constitute a sealing member, and it is sufficient that at least the portions from which the terminals 6a and 6b are drawn out of the sealing member have an insulating property.
【００１７】さらに、保持体３のフランジ部３ｂ及び内
ケース４の外周には、上下が開口された円筒状の外ケー
ス５が嵌合されている。外ケース５の下部開口縁５ａは
内ケース４の下端面よりやや長く形成されている。ま
た、外ケース５の下部開口は、外ケース５内の内ケース
４の切欠き部４ｄにより、受圧部４ｅの外面に連通され
ており、したがって、圧力遮断センサ１を２次電池内に
備えたとき、２次電池内の電解液が切欠き部４ｄ内にも
満たされ、受圧部４ｅに電解液の圧力（電池内圧）がか
かるようになっている。また、外ケース５の外周面は円
筒形状なので、その外周面に後述する正極２２、負極２
３、及びセパレータ等を渦巻状に巻きやすくなってい
る。Further, a cylindrical outer case 5 having upper and lower openings is fitted around the flange 3b of the holder 3 and the inner case 4. The lower opening edge 5a of the outer case 5 is formed to be slightly longer than the lower end surface of the inner case 4. Further, the lower opening of the outer case 5 is communicated with the outer surface of the pressure receiving portion 4e by the notch 4d of the inner case 4 in the outer case 5, and therefore the pressure cutoff sensor 1 is provided in the secondary battery. At this time, the electrolytic solution in the secondary battery is also filled in the cutout portion 4d, and the pressure of the electrolytic solution (battery internal pressure) is applied to the pressure receiving portion 4e. Further, since the outer peripheral surface of the outer case 5 is cylindrical, a positive electrode 22 and a negative electrode 2 to be described later are provided on the outer peripheral surface thereof.
3 and the separator etc. are easily wound in a spiral shape.
【００１８】なお、前述した圧力遮断センサ１は、２次
電池の正極２２側に接続される場合のもので、２次電池
の負極２３側に接続する場合は端子を銅製とする。The pressure cutoff sensor 1 is connected to the positive electrode 22 side of the secondary battery, and the terminal is made of copper when connected to the negative electrode 23 side of the secondary battery.
【００１９】次に、図１に示す圧力遮断センサ１の組立
方法について説明する。まず、基板２ａにアルミ箔を接
着固定して基板２ａに一体化する。この状態で、破断部
材２の一端部から同一方向に一対の端子６ａ，６ｂが引
き出されている。この破断部材２を端子６ａ，６ｂから
保持体３の破断部材取付穴３ｃ及び端子挿入穴３ｄ，３
ｄに差し込む。次いで、保持体３の円柱部３ａに内ケー
ス４を嵌合して内ケース４内に破断部材２を収納する。
次いで、外ケース５内に保持体３のフランジ部３ｂ及び
内ケース４を嵌合させ、さらに、図１（ａ）のＢ部分、
つまり保持体３と外ケース５が重なり合う部分を全周に
渡ってかしめて、圧力遮断センサ１内部を確実に密閉し
ている。Next, a method of assembling the pressure cutoff sensor 1 shown in FIG. 1 will be described. First, an aluminum foil is adhesively fixed to the substrate 2a to be integrated with the substrate 2a. In this state, the pair of terminals 6a and 6b are pulled out from one end of the breaking member 2 in the same direction. From the terminals 6a and 6b, the breaking member 2 is attached to the breaking member mounting hole 3c and the terminal inserting holes 3d and 3 of the holder 3.
Insert into d. Then, the inner case 4 is fitted into the columnar portion 3 a of the holder 3 and the breaking member 2 is housed in the inner case 4.
Next, the flange portion 3b of the holding body 3 and the inner case 4 are fitted into the outer case 5, and further, the portion B of FIG.
That is, the portion where the holding body 3 and the outer case 5 overlap each other is caulked over the entire circumference to reliably seal the inside of the pressure cutoff sensor 1.
【００２０】このような圧力遮断センサ１は、リチウム
イオン２次電池やニッケル水素２次電池など２次電池９
の内部に組み込まれて使用される。図３は本発明の一実
施例に係るリチウムイオン２次電池を例にして２次電池
１９の要部概略を示したものである。２１は上端部が開
口されている有底の内部中空の円筒体であり外部負極と
なる電池ケースである。そして、この電池ケース２１の
内部には内部電極（発電部）４８として酸化リチウムコ
バルトからなる正極２２、カーボンからなる負極２３、
正極２２と負極２３のショートを防止するセパレータ等
が、圧力遮断センサ１自体を電池巻芯として渦巻状に巻
回されている。また、負極２３はセパレータを挟んで正
極２２と対向するように設けられているとともに、リー
ド線５０によって電池ケース（外部負極）２１と接続し
ている。さらに、この電池ケース２１の内部は電解液
（図示せず）で満たされている。圧力遮断センサ１は端
子６ａにより外部電極（正極）と接続されており、また
端子６ｂにより２次電池の正極（内部正極）２２側に接
続されている。Such a pressure cutoff sensor 1 is used in a secondary battery 9 such as a lithium ion secondary battery or a nickel hydrogen secondary battery.
Used by being incorporated inside. FIG. 3 is a schematic view of a main part of a secondary battery 19 using a lithium ion secondary battery according to an embodiment of the present invention as an example. Reference numeral 21 denotes a battery case having a bottomed inner hollow cylindrical body having an open upper end and serving as an external negative electrode. Then, inside the battery case 21, a positive electrode 22 made of lithium cobalt oxide, a negative electrode 23 made of carbon, as an internal electrode (power generation part) 48,
A separator or the like for preventing a short circuit between the positive electrode 22 and the negative electrode 23 is spirally wound with the pressure cutoff sensor 1 itself as the battery core. The negative electrode 23 is provided so as to face the positive electrode 22 with the separator interposed therebetween, and is connected to the battery case (external negative electrode) 21 by the lead wire 50. Further, the inside of the battery case 21 is filled with an electrolytic solution (not shown). The pressure cutoff sensor 1 is connected to an external electrode (positive electrode) via a terminal 6a, and is connected to the positive electrode (internal positive electrode) 22 side of the secondary battery via a terminal 6b.
【００２１】なお、図３には図示していないが、２次電
池２０の電池ケース２１の上部開口には、外部電極（図
示せず）との間には全周にわたってガスケット（図示せ
ず）が設けられており、電池ケース２１の頂部に設けた
カシメ部（図示せず）を全周にわたってカシメつけるこ
とによって、外部電極（図示せず）の電池ケース２１へ
の保持、電池ケース２１と外部電極（図示せず）の絶縁
性を確保、２次電池内の密閉性の確保を行っている。Although not shown in FIG. 3, a gasket (not shown) is provided over the entire circumference of the upper opening of the battery case 21 of the secondary battery 20 between itself and an external electrode (not shown). By holding a crimp portion (not shown) provided on the top of the battery case 21 over the entire circumference, the external electrode (not shown) is held in the battery case 21, and the battery case 21 and the external The insulation of the electrodes (not shown) is ensured, and the airtightness inside the secondary battery is ensured.
【００２２】次に、前記実施例の動作について説明す
る。充電中、圧力遮断センサ１において電流は、外部電
極（図示せず）から順次、端子６ａ、導電路２ｂ、端子
６ｂと流れ、２次電池の正極２２に導出される。このと
き充電が完了しても電流を流し続けて更に過充電が行わ
れたり、規定された電流よりも大きな電流で充電が行わ
れる、あるいは過放電が行われると、２次電池に異常が
生じて２次電池内の圧力や温度が上昇する。２次電池内
の圧力が上昇すると、電解液の圧力も高まって電池内部
圧力として圧力遮断センサ１の受圧部４ｅに伝わる。す
ると、この電池内部圧力が受圧部４ｅをその内方（図１
（ａ）の左方）へ撓ませて変形させ、受圧部４ｅの内側
面４ｂが破断部材２の右側面に当接して図１（ａ）の左
方に押す。更に２次電池内の圧力が上昇し、その圧力が
一定の圧力に達したとき、つまり、さらに受圧部４ｅが
押し込まれると、図２に示すように、破断部材２の基板
２ａに割れＣが生じて破断する。この破断により、基板
２ａ上の導電路２ｂも破断あるいは剥離して電流の導通
が遮断される。Next, the operation of the above embodiment will be described. During charging, the current in the pressure cutoff sensor 1 sequentially flows from the external electrode (not shown) to the terminal 6a, the conductive path 2b, and the terminal 6b, and is led to the positive electrode 22 of the secondary battery. At this time, even if charging is completed, current continues to flow and overcharging is further performed, charging is performed with a current larger than the specified current, or overdischarging is performed, and an abnormality occurs in the secondary battery. As a result, the pressure and temperature inside the secondary battery rise. When the pressure in the secondary battery rises, the pressure of the electrolytic solution also rises and is transmitted to the pressure receiving portion 4e of the pressure cutoff sensor 1 as the battery internal pressure. Then, the internal pressure of the battery causes the pressure receiving portion 4e to move inward (see FIG.
It is bent to the left side of (a) and deformed, and the inner side surface 4b of the pressure receiving portion 4e contacts the right side surface of the breaking member 2 and pushes it to the left side in FIG. 1 (a). When the pressure in the secondary battery further rises and reaches a certain pressure, that is, when the pressure receiving portion 4e is further pushed in, as shown in FIG. 2, a crack C is formed in the substrate 2a of the breaking member 2. It occurs and breaks. Due to this breakage, the conductive path 2b on the substrate 2a is also broken or peeled off, and the conduction of current is interrupted.
【００２３】このようにして、圧力遮断センサ１は外部
電極と正極２２間に流れる電流を遮断し、これ以上の充
電を止めさせるとともに、放電も遮断してリチウムイオ
ン２次電池が２次電池として機能できない状態にする。In this way, the pressure cutoff sensor 1 cuts off the current flowing between the external electrode and the positive electrode 22, stops further charging, and also cuts off the discharge, so that the lithium ion secondary battery serves as a secondary battery. Make it inoperable.
【００２４】なお、受圧部４ｅの内側に、破断部材２に
当接する突起を設けてもよし、また、破断部材２の基部
の一面もしくは両面に切欠きを形成して基板２ａが破断
されやすいようにしてもよい。また、前記実施例では、
圧力遮断センサ１を内部正極２２と外部正極（電極）を
結ぶ導電路中に設けた例で説明したが、本発明はこれに
限られるものでなく、圧力遮断センサ１を内部負極２３
と電池ケース等の外部負極を結ぶ導電路中に設けるよう
にしても、あるいは両方の導電路中に設けるようにして
も良い。A protrusion that abuts the breaking member 2 may be provided inside the pressure receiving portion 4e, or a notch may be formed on one or both sides of the base of the breaking member 2 so that the substrate 2a is easily broken. You may Further, in the above embodiment,
The pressure cut-off sensor 1 has been described in the example provided in the conductive path connecting the internal positive electrode 22 and the external positive electrode (electrode), but the present invention is not limited to this.
May be provided in a conductive path connecting the external negative electrode such as the battery case, or in both conductive paths.
【００２５】このように構成された前記実施例にあって
は、電池ケース２１内に、電池巻芯４８に正極２２と負
極２３を巻回して発電部４９を構成すると共に、発電部
４９の内部正極２２と外部正極（外部電極）を結ぶ導電
路中（あるいは内部負極２３と電池ケース２１等の外部
負極を結ぶ導電路中の少なくとも一方）に、２つの端子
６ａ，６ｂを有し、端子６ａを外部正極（あるいは外部
負極）に接続し、端子６ｂを内部正極２２（あるいは内
部負極２３）に接続し、通常は両端子６ａ，６ｂ間を導
通させ、電池内部圧力が設定値以上になると、両端子６
ａ，６ｂ間の導通を遮断する破断部材２とを設けた圧力
遮断センサ１を備え、電池巻芯４８の中空部内に若しく
は電池巻芯に代えて電池巻芯として圧力遮断センサ１を
配設したため、従来デッドスペースであった電池巻芯部
分に圧力遮断センサ１を配設して、従来、電池の上方に
占めていた圧力遮断センサ及び圧力遮断センサ取付部材
のスペースが必要なくなってそのスペースを電池の電極
の増設に回せるので、同じ外形寸法であれば電池容量を
高めることができ、若しくは電池容量を同じくする場合
は小型化を図れる。また、従来のような電池蓋近傍でな
く電池巻芯部分に圧力遮断センサ１を配設しているの
で、圧力遮断センサ１の接続を正極側（内部正極２２と
外部正極を結ぶ導電路中）だけでなく、負極側（内部負
極２３と電池ケース２１等の外部負極を結ぶ導電路中）
での対応もでき、電池の設計の自由度を増すことができ
る。In the above embodiment having the above-described structure, the positive electrode 22 and the negative electrode 23 are wound around the battery core 48 in the battery case 21 to form the power generation section 49, and the inside of the power generation section 49 is formed. Two terminals 6a and 6b are provided in the conductive path connecting the positive electrode 22 and the external positive electrode (external electrode) (or at least one of the conductive paths connecting the internal negative electrode 23 and the external negative electrode such as the battery case 21). Is connected to an external positive electrode (or an external negative electrode), the terminal 6b is connected to the internal positive electrode 22 (or the internal negative electrode 23), and normally the two terminals 6a and 6b are electrically connected, and when the battery internal pressure becomes equal to or higher than a set value, Both terminals 6
Since the pressure cutoff sensor 1 provided with the breaking member 2 for cutting off the conduction between a and 6b is provided, and the pressure cutoff sensor 1 is arranged in the hollow portion of the battery winding core 48 or as the battery winding core instead of the battery winding core. By disposing the pressure cutoff sensor 1 in the battery core portion, which has been a dead space in the past, the space for the pressure cutoff sensor and the pressure cutoff sensor mounting member, which has conventionally been occupied above the battery, is no longer required, and the space is used as Since it is possible to increase the number of electrodes, it is possible to increase the battery capacity with the same outer dimensions, or to reduce the size when the battery capacity is the same. Further, since the pressure cutoff sensor 1 is arranged not in the vicinity of the battery lid as in the conventional case but in the battery core portion, the pressure cutoff sensor 1 is connected to the positive electrode side (in the conductive path connecting the inner positive electrode 22 and the outer positive electrode). Not only the negative electrode side (in the conductive path connecting the internal negative electrode 23 and the external negative electrode such as the battery case 21)
It is also possible to increase the degree of freedom in battery design.
【００２６】また、前記実施例にあっては、圧力遮断セ
ンサ１は、内部に破断部材２を収納し、電池内部圧力に
より撓んで破断部材２を押圧する受圧部４ｅ、及び破断
部材２の一端部を保持する保持体３を有する密閉部材
（３，４）と、導電路２ｂを有し、保持体３により片持
ち支持されるとともに、所定値を越える圧力を受ける
と、密閉部材（３，４）の受圧部４ｅにより押し曲げら
れて該導電路２ｂを遮断させられる破断部材２と、導電
路２ｂの端部にそれぞれ接続され、あるいは一体に、同
一方向に密閉部材（３，４）の外部へ延設された一対の
端子６ａ，６ｂとを具備したため、構造が単純で、かつ
電池巻芯部分に配置することができ、かつ電池巻芯から
の端子の接続が容易である。また、破断部材２（導電路
２ｂ）の遮断が密閉された密閉部材（圧力遮断センサ
１）内部で行われるので、電池内部ガスのアーク等によ
る爆発の虞れがない。Further, in the above-described embodiment, the pressure cutoff sensor 1 houses the breaking member 2 therein, the pressure receiving portion 4e for bending the pressing member 2 by the internal pressure of the battery, and one end of the breaking member 2. The sealing member (3, 4) having the holding body 3 for holding the portion and the conductive path 2b are cantilevered by the holding body 3, and when a pressure exceeding a predetermined value is received, the sealing member (3, 4) is formed. 4) The breaking member 2 that is pressed and bent by the pressure receiving portion 4e to interrupt the conductive path 2b, and the breaking member 2 that is connected to the ends of the conductive path 2b, respectively, or integrally with each other in the same direction as the sealing member (3, 4). Since it has the pair of terminals 6a and 6b extended to the outside, the structure is simple, it can be arranged in the battery core portion, and the connection of the terminal from the battery core is easy. Further, since the breaking member 2 (conductive path 2b) is shut off inside the sealed sealing member (pressure shutoff sensor 1), there is no risk of explosion due to arcing of gas inside the battery.
【００２７】[0027]
【発明の効果】請求項１記載の発明によれば、従来デッ
ドスペースであった電池巻芯部分に圧力遮断センサを配
設して、従来、電池の上方に占めていた圧力遮断センサ
及び圧力遮断センサ取付部材のスペースが必要なくなっ
てそのスペースを電池の電極の増設に回せるので、同じ
外形寸法であれば電池容量を高めることができ、若しく
は電池容量を同じくする場合は小型化を図れる。また、
従来のような電池蓋近傍でなく電池巻芯部分に圧力遮断
センサを配設しているので、圧力遮断センサの接続を正
極側（内部正極と外部正極を結ぶ導電路中）だけでな
く、負極側（内部負極と電池ケース等の外部負極を結ぶ
導電路中）での対応もでき、電池の設計の自由度を増す
ことができる。According to the first aspect of the present invention, the pressure cut-off sensor and the pressure cut-off which are conventionally occupied above the battery are provided by disposing the pressure cut-off sensor in the battery core portion, which is a dead space in the past. Since the space for the sensor mounting member is not needed and the space can be used for the addition of the electrode of the battery, the battery capacity can be increased with the same outer dimensions, or the size can be reduced when the battery capacity is the same. Also,
Since the pressure cutoff sensor is arranged not in the vicinity of the battery lid as in the conventional case but in the battery core, the pressure cutoff sensor is connected not only on the positive electrode side (in the conductive path connecting the internal positive electrode and the external positive electrode) but also on the negative electrode. The side (in the conductive path connecting the internal negative electrode and the external negative electrode such as the battery case) can be dealt with, and the degree of freedom in designing the battery can be increased.
【００２８】請求項２記載の発明によれば、構造が単純
で、かつ電池巻芯部分に配置することができ、かつ電池
巻芯からの端子の接続が容易である。また、破断部材
（導電路）の遮断が密閉された密閉部材（圧力遮断セン
サ）内部で行われるので、電池内部ガスのアーク等によ
る爆発の虞れがない。According to the second aspect of the invention, the structure is simple, the battery core can be arranged, and the terminals can be easily connected from the battery core. Further, since the breaking member (conductive path) is shut off inside the closed sealing member (pressure shutoff sensor), there is no risk of explosion due to arcing of gas inside the battery.
【図１】(a),(b)は本発明の実施例に係る圧力遮断セン
サの縦断面図、及びＡ−Ａ線断面図である。1A and 1B are a vertical sectional view and a sectional view taken along the line AA of a pressure cutoff sensor according to an embodiment of the present invention.
【図２】図１(a)に対応し、導電路が遮断された状態の
断面図である。FIG. 2 is a cross-sectional view corresponding to FIG. 1A and showing a state in which a conductive path is cut off.
【図３】本発明の実施例に係る２次電池としてリチウム
イオン２次電池を使用した状態の概略を示す説明図であ
る。FIG. 3 is an explanatory diagram showing an outline of a state in which a lithium ion secondary battery is used as a secondary battery according to an example of the present invention.
【図４】(a),(b)は従来の圧力遮断センサの概略を示す
説明図である。4 (a) and 4 (b) are explanatory views schematically showing a conventional pressure cutoff sensor.
１ 圧力遮断センサ ２ 破断部材 ２ｂ 導電路 ３ 保持体 ４ 内ケース ４ｅ 受圧部 ６ａ，６ｂ 端子 ２１ 電池ケース ４８ 電池巻芯 ４９ 発電部 ５０ リード線 1 Pressure cutoff sensor 2 Breaking member 2b Conductive path 3 Holding body 4 Inner case 4e Pressure receiving part 6a, 6b Terminal 21 Battery case 48 Battery core 49 Power generation part 50 Lead wire
Claims (2)
を巻回して発電部を構成すると共に、前記発電部の内部
正極と外部正極を結ぶ導電路中か、あるいは内部負極と
電池ケース等の外部負極を結ぶ導電路中の少なくとも一
方に、 ２つの端子を有し、前記端子の一方を前記外部正極ある
いは外部負極に接続し、前記端子の他方を前記内部正極
あるいは内部負極に接続し、通常は前記両端子間を導通
させ、電池内部圧力が設定値以上になると、前記両端子
間の導通を遮断する破断部材とを設けた圧力遮断センサ
を備え、 前記電池巻芯の中空部内に若しくは電池巻芯に代えて電
池巻芯として前記圧力遮断センサを配設したことを特徴
とする２次電池。1. A power generator is constructed by winding a positive electrode and a negative electrode around a battery core in a battery case, and in a conductive path connecting an inner positive electrode and an outer positive electrode of the power generating unit, or an inner negative electrode and a battery case. At least one of the conductive paths connecting the external negative electrodes has two terminals, one of the terminals is connected to the external positive electrode or the external negative electrode, and the other of the terminals is connected to the internal positive electrode or the internal negative electrode. , Normally includes a pressure cut-off sensor provided with a breaking member that cuts off the conduction between the terminals when the internal pressure of the battery is equal to or higher than a set value by conducting the conduction between the terminals, and inside the hollow portion of the battery core. Alternatively, a secondary battery in which the pressure cutoff sensor is provided as a battery core instead of the battery core.
サは、 内部に前記破断部材を収納し、電池内部圧力により撓ん
で前記破断部材を押圧する受圧部、及び前記破断部材の
一端部を保持する保持部を有する密閉部材と、 導電路を有し、前記保持部により片持ち支持されるとと
もに、所定値を越える圧力を受けると、前記密閉部材の
受圧部により押し曲げられて該導電路を遮断させられる
破断部材と、 前記導電路の端部にそれぞれ接続され、あるいは一体
に、同一方向に前記密閉部材の外部へ延設された一対の
端子とを具備したことを特徴とする２次電池。2. The pressure cut-off sensor according to claim 1, wherein the breaking member is housed therein, a pressure receiving portion that bends by the internal pressure of a battery and presses the breaking member, and one end portion of the breaking member. A sealing member having a holding portion for holding and a conductive path, which is cantilevered by the holding portion, and when a pressure exceeding a predetermined value is received, the pressure receiving portion of the sealing member pushes and bends the conductive path. And a pair of terminals that are respectively connected to the ends of the conductive paths or that are integrally formed to extend to the outside of the sealing member in the same direction. battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19754495A JP3355263B2 (en) | 1995-08-02 | 1995-08-02 | Rechargeable battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19754495A JP3355263B2 (en) | 1995-08-02 | 1995-08-02 | Rechargeable battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0945361A true JPH0945361A (en) | 1997-02-14 |
| JP3355263B2 JP3355263B2 (en) | 2002-12-09 |
Family
ID=16376252
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19754495A Expired - Fee Related JP3355263B2 (en) | 1995-08-02 | 1995-08-02 | Rechargeable battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3355263B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20190078398A (en) * | 2017-12-26 | 2019-07-04 | 주식회사 엘지화학 | Cylindrical battery having pressure sensor, and method for measuring internal pressure thereof |
| CN110208711A (en) * | 2019-05-15 | 2019-09-06 | 天津力神电池股份有限公司 | Method for pole piece stress condition in on-line testing cylindrical battery charge and discharge process |
| WO2023059075A1 (en) * | 2021-10-05 | 2023-04-13 | 주식회사 엘지에너지솔루션 | Electrode assembly, cylindrical battery, and system comprising same |
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|---|---|---|---|---|
| JPH06203827A (en) * | 1992-12-28 | 1994-07-22 | Toshiba Battery Co Ltd | Nonaqueous electrolyte battery |
| JPH07105932A (en) * | 1993-10-08 | 1995-04-21 | Sony Corp | Pressure sensitive current shut-off element and enclosed battery |
| JPH07105933A (en) * | 1993-10-06 | 1995-04-21 | Hitachi Maxell Ltd | Anti-explosive enclosed battery |
-
1995
- 1995-08-02 JP JP19754495A patent/JP3355263B2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06203827A (en) * | 1992-12-28 | 1994-07-22 | Toshiba Battery Co Ltd | Nonaqueous electrolyte battery |
| JPH07105933A (en) * | 1993-10-06 | 1995-04-21 | Hitachi Maxell Ltd | Anti-explosive enclosed battery |
| JPH07105932A (en) * | 1993-10-08 | 1995-04-21 | Sony Corp | Pressure sensitive current shut-off element and enclosed battery |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20190078398A (en) * | 2017-12-26 | 2019-07-04 | 주식회사 엘지화학 | Cylindrical battery having pressure sensor, and method for measuring internal pressure thereof |
| WO2019132287A1 (en) * | 2017-12-26 | 2019-07-04 | 주식회사 엘지화학 | Cylindrical battery in which pressure sensor is embedded and method for measuring internal pressure of cylindrical battery |
| CN111133626A (en) * | 2017-12-26 | 2020-05-08 | 株式会社Lg化学 | Cylindrical battery with embedded pressure sensor and method for measuring internal pressure of cylindrical battery |
| EP3637534A4 (en) * | 2017-12-26 | 2020-10-28 | Lg Chem, Ltd. | Cylindrical battery in which pressure sensor is embedded and method for measuring internal pressure of cylindrical battery |
| US11605842B2 (en) | 2017-12-26 | 2023-03-14 | Lg Energy Solution, Ltd. | Cylindrical battery having pressure sensor, and method for measuring internal pressure thereof |
| CN111133626B (en) * | 2017-12-26 | 2023-06-23 | 株式会社Lg新能源 | Cylindrical battery embedded with pressure sensor and method for measuring internal pressure of cylindrical battery |
| CN110208711A (en) * | 2019-05-15 | 2019-09-06 | 天津力神电池股份有限公司 | Method for pole piece stress condition in on-line testing cylindrical battery charge and discharge process |
| CN110208711B (en) * | 2019-05-15 | 2021-04-16 | 天津力神电池股份有限公司 | Method for on-line testing stress condition of pole piece in charging and discharging processes of cylindrical battery |
| WO2023059075A1 (en) * | 2021-10-05 | 2023-04-13 | 주식회사 엘지에너지솔루션 | Electrode assembly, cylindrical battery, and system comprising same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3355263B2 (en) | 2002-12-09 |
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