JP5053036B2 - Sealed battery - Google Patents
Sealed battery Download PDFInfo
- Publication number
- JP5053036B2 JP5053036B2 JP2007277278A JP2007277278A JP5053036B2 JP 5053036 B2 JP5053036 B2 JP 5053036B2 JP 2007277278 A JP2007277278 A JP 2007277278A JP 2007277278 A JP2007277278 A JP 2007277278A JP 5053036 B2 JP5053036 B2 JP 5053036B2
- Authority
- JP
- Japan
- Prior art keywords
- sealing plate
- electrode
- terminal
- electrode pin
- insulating plate
- 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.)
- Expired - Fee Related
Links
- 238000007789 sealing Methods 0.000 claims description 74
- 229920003002 synthetic resin Polymers 0.000 claims description 7
- 239000000057 synthetic resin Substances 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 6
- 230000005674 electromagnetic induction Effects 0.000 claims description 5
- 239000004020 conductor Substances 0.000 claims description 2
- 238000000465 moulding Methods 0.000 claims 1
- 239000003792 electrolyte Substances 0.000 description 10
- 238000003466 welding Methods 0.000 description 8
- 239000008151 electrolyte solution Substances 0.000 description 7
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 6
- 229910001416 lithium ion Inorganic materials 0.000 description 6
- 239000012212 insulator Substances 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- -1 nickel metal hydride Chemical class 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 239000004696 Poly ether ether ketone Substances 0.000 description 2
- 239000004734 Polyphenylene sulfide Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052987 metal hydride Inorganic materials 0.000 description 2
- 239000000615 nonconductor Substances 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 229920001652 poly(etherketoneketone) Polymers 0.000 description 2
- 229920002530 polyetherether ketone Polymers 0.000 description 2
- 229920000069 polyphenylene sulfide Polymers 0.000 description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 229920008285 Poly(ether ketone) PEK Polymers 0.000 description 1
- 229920012266 Poly(ether sulfone) PES Polymers 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
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
Landscapes
- Sealing Battery Cases Or Jackets (AREA)
Description
本発明は、リチウムイオン電池などの密閉型電池に係り、特に、電池ケースの封口構成に関する。 The present invention relates to a sealed battery such as a lithium ion battery, and more particularly to a sealing configuration of a battery case.
近年、携帯電話、小型コンピュータなどの機器については、軽量化や高機能化の開発が進んでおり、これにともなって駆動電源であるニッケル水素電池やリチウムイオン電池などの繰り返し充電可能な二次電池に対しても多くの研究がなされている。 In recent years, the development of lighter and more advanced devices such as mobile phones and small computers has been developed, and as a result, rechargeable secondary batteries such as nickel metal hydride batteries and lithium ion batteries that are driving power supplies. A lot of research has been done.
一般的なリチウムイオン電池の構成は、例えば、特許文献1に記載されている図7に示すように、正極電極と負極電極とをセパレータで隔離し、これらをロール状に巻回して形成して一側に電極タブ(38)を設けた極板組立体(33)を角筒状の金属性の電池ケース(32)に収容し、電池ケース(32)の上段開口を前記電極タブ(38)とは極性の異なる電極を構成するキャッププレート(以下、封口板(39)という。)で溶接により封口しているものであって、封口板(39)に形成された孔(45)には、電気絶縁物であるガスケット(44)および絶縁体(40)を介して電極ピン(42)を挿通し、前記電極タブ(38)に電気的に連結していた。
For example, as shown in FIG. 7 described in
そして、特許文献2には、前記と同様の封口板(59)と電池ケース(52)がレーザー溶接などによって接合される際に、溶接熱による温度上昇で、封口板(59)の上面より上方に突出している外部絶縁物(64)が熱的に損傷し、変形などによって封口不良を生じることが従来例として示されており、これを防いで封口特性を良好にするため、図8に示すように、電極端子(62)と封口板(59)との間に設けた外部絶縁板(64)を、封口板(59)の上面より上部には突出させない位置に装着することで溶接時の熱影響を受けないようにした構成が記載されている。
しかしながら、上記特許文献2に記載の構成においても、封口板(59)の透孔(65)と電極端子(62)に対して、外部絶縁物(64)および絶縁板(60)は、嵌めのみによって固着されていることから、電極端子(62)と外部絶縁物(64)や絶縁板(60)との隙間、あるいは各絶縁物(60)(64)と封口板(59)の透孔(65)との隙間を浸透して電解液が外部に漏洩する可能性がまれにあった。この電解液の漏洩は、電池としての機能をなくすだけでなく、その電池を駆動電源としている、例えば、携帯電話の電気回路などの本体機能までも損なう影響があり、さらにその周辺までも汚染される弊害を生じるものである。
However, even in the configuration described in
本発明は上記の点を考慮してなされたもので、電池ケースの開口を封口する封口板と、この封口板の透孔を貫通する電極端子と、これら封口板と電極端子との間に介在させた電気的絶縁物とのそれぞれの間隙を封止して、電解液の液漏れを確実に防止するようにした密閉型電池を提供することを目的とする。 The present invention has been made in consideration of the above points, and includes a sealing plate that seals the opening of the battery case, an electrode terminal that penetrates the through hole of the sealing plate, and an intervening space between the sealing plate and the electrode terminal. It is an object of the present invention to provide a sealed battery in which a gap between each of the electrical insulators thus sealed is sealed to reliably prevent leakage of the electrolyte.
本発明の密閉型電池は、一方の電極をなす導電体からなる封口板と、他方の電極端子である電極ピンと、熱溶着性のある合成樹脂で形成した絶縁板と、導電性の端子リベットを備え、電池ケースの一端開口を前記封口板で封止し、前記絶縁板を前記封口板より前記電池ケース内側に配するとともに、前記封口板に重ねてなり、前記絶縁板の電池ケース内側の面に前記端子リベットを重ねて配し、前記電極ピンを前記電池ケースの内側から前記端子リベットと前記絶縁板と前記封口板を貫通して外部に突出させ、前記電極ピンの前記電池ケースの内部の先端を前記端子リベットに重ね、前記電極ピンの前記電池ケースの外部の先端を加圧し、前記端子リベットと前記電極ピンとを電気的に接続するとともに前記封口板と前記電極ピンとを電気的に絶縁し、前記封口板と前記絶縁板、前記絶縁板と前記端子リベット、及び前記端子リベットと前記電極ピンの各当接面を前記電極ピンを取り囲んで環状に加熱接合したことを特徴とするものである。 Sealed battery of the present invention, a sealing plate made of a conductor that forms the hand of the electrodes, and the electrode pin which is the other electrode terminal, an insulating plate formed by thermal adhesiveness of some synthetic resin, the conductive terminal rivet An end opening of the battery case is sealed with the sealing plate, and the insulating plate is disposed on the inner side of the battery case than the sealing plate, and is stacked on the sealing plate, The terminal rivet is arranged on the surface, and the electrode pin protrudes from the inside of the battery case through the terminal rivet, the insulating plate, and the sealing plate to the outside, and the electrode pin inside the battery case overlapping the tip to the terminal rivet, electrical and the electrode pins and the sealing plate together with said external tip pressurizing the battery case of the electrode pins, electrically connecting the electrode pins and the terminal rivet Which insulated, the sealing plate and the insulating plate, wherein the insulating plate and the terminal rivet, and was heat-bonding each contact surface of the electrode pin and the terminal rivet annularly surrounds the electrode pin It is.
この発明によれば、封口板や絶縁部材における電極端子の挿通部近傍からの電解液の漏れを確実に防止することができる角形二次電池や円筒型電池などの密閉型電池を得ることができる。 According to the present invention, it is possible to obtain a sealed battery such as a rectangular secondary battery or a cylindrical battery that can reliably prevent leakage of the electrolyte from the vicinity of the insertion portion of the electrode terminal in the sealing plate or the insulating member. .
以下、図面に基づき本発明の1実施形態について説明する。図1に要部の縦断面図を示す密閉型電池であるリチウムイオン二次電池(1)は、扁平な角筒状のアルミニウム材で形成された電池ケース(2)と、この電池ケース(2)の内部に収納されているセパレータ(4)で仕切った正極の第1の電極板(5)と負極の第2の電極板(6)とを巻装した電極組立体(3)と、前記電池ケース(2)の上端開口を閉塞する封口板ブロック(7)とから構成されている。 Hereinafter, an embodiment of the present invention will be described with reference to the drawings. A lithium ion secondary battery (1), which is a sealed battery whose main part is shown in a longitudinal sectional view in FIG. 1, includes a battery case (2) formed of a flat rectangular tube-shaped aluminum material, and the battery case (2 The electrode assembly (3) in which the first electrode plate (5) of the positive electrode and the second electrode plate (6) of the negative electrode, which are partitioned by the separator (4) housed inside, are wound, It is comprised from the sealing board block (7) which obstruct | occludes the upper end opening of a battery case (2).
前記電極組立体(3)の各電極板層の隙間には電解液が封入されており、充電と放電が繰り返されるとこの電解液を介してリチウムイオンが前記電極板(5)(6)の正極と負極との間を移動するものであって、電池ケース(2)の上端開口から電極組立体(3)を内部に挿入した後、前記開口を封口板ブロック(7)で封止するものである。 Electrolytic solution is sealed in the gaps between the electrode plate layers of the electrode assembly (3), and when charging and discharging are repeated, lithium ions are transferred to the electrode plates (5) and (6) through the electrolytic solution. It moves between the positive electrode and the negative electrode, and after the electrode assembly (3) is inserted into the battery case (2) from the upper end opening, the opening is sealed with the sealing plate block (7). It is.
封口板ブロック(7)は、電池ケース(2)の上面開口を閉塞するように扁平でほぼ長方形状をなす良導電体のアルミニウムから形成された負極をなす封口板(9)と、この封口板(9)のケース内側に前記封口板(9)の底面をほぼ覆うように設けられたポリプロピレンなどの熱溶着性のある合成樹脂で形成した絶縁板(10)と、この絶縁板(10)のケース内側の底面に沿うように密着して設けられ、前記電極組立体(3)のタブ(8)に電気的に接続される導電性の板体からなる端子リベット(11)と、この端子リベット(11)と一体的に導電関係に嵌められ、前記絶縁板(10)および封口板(9)を貫通して電池ケース(2)の外部に突出する電極ピン(12)と、この電極ピン(12)の外部先端に一体的に嵌められた正極端子(13)と、前記電極ピン(12)および正極端子(13)と負極である封口板(9)との間にこれらを電気絶縁するために皿状に形成して介在させたフッ素樹脂性のガスケット(14)から構成されている。 The sealing plate block (7) includes a sealing plate (9) that forms a negative electrode made of a good conductive aluminum that is flat and substantially rectangular so as to close the upper surface opening of the battery case (2), and the sealing plate. An insulating plate (10) formed of a heat-welding synthetic resin, such as polypropylene, provided so as to substantially cover the bottom surface of the sealing plate (9) inside the case of (9), and the insulating plate (10) A terminal rivet (11) which is provided in close contact with the bottom surface inside the case and is electrically connected to the tab (8) of the electrode assembly (3); and the terminal rivet An electrode pin (12) which is fitted in a conductive relationship integrally with (11), passes through the insulating plate (10) and the sealing plate (9) and protrudes to the outside of the battery case (2), and this electrode pin ( 12) a positive electrode terminal (13) integrally fitted to the external tip of the above, Consists of a fluororesin gasket (14) formed and interposed in a dish shape between the electrode pin (12) and the positive electrode terminal (13) and the sealing plate (9) as the negative electrode in order to electrically insulate them Has been.
前記封口板(9)には、前記電極ピン(12)が挿通する透孔(15)をその表面のほぼ中央部に穿設し、さらに、電解液を注入するための通路である注入口(16)や、内圧が上昇して一定の圧力以上に達すると内部のガスが放出されるようにした安全ベント(17)を設けており、前記各部材から構成した封口板ブロック(7)を電池ケース(2)の開口部の内面側に嵌入してその外周縁の当接部をレーザー溶接(18)により接合して密閉するものである。なお、前記電解液注入口(16)は、キャップ(19)を圧入することで密閉されている。 The sealing plate (9) is formed with a through hole (15) through which the electrode pin (12) is inserted at a substantially central portion of the surface thereof, and further an injection port (a passage for injecting an electrolyte solution). 16) and a safety vent (17) is provided so that the internal gas is released when the internal pressure rises to a certain level or higher, and the sealing plate block (7) composed of each of the above members is connected to the battery. The case (2) is inserted into the inner surface side of the opening, and the contact portion of the outer periphery is joined and sealed by laser welding (18). The electrolyte inlet (16) is hermetically sealed by press-fitting a cap (19).
封口板ブロック(7)における前記電極ピン(12)と端子リベット(11)とは、図2に示すように、電極ピン(12)を端子リベット(11)の透孔に貫通させて下端のヘッダー部を固着し、前記正極端子(13)と電極ピン(12)とは、正極端子(13)の透孔を貫通させた電極ピン(12)の上端部を嵌めることで固着され、さらに、封口板(9)を介して絶縁板(10)やガスケット(14)も嵌めにより固定されている。 As shown in FIG. 2, the electrode pin (12) and the terminal rivet (11) in the sealing plate block (7) are formed by penetrating the electrode pin (12) through the through-hole of the terminal rivet (11). The positive electrode terminal (13) and the electrode pin (12) are fixed by fitting the upper end portion of the electrode pin (12) penetrating the through hole of the positive electrode terminal (13). The insulating plate (10) and the gasket (14) are also fixed by fitting through the plate (9).
そのため、前記電極ピン(12)の下端部と端子リベット(11)との隙間から実線で示す矢印のように浸入した電池ケース(2)内部の電解液は、電極ピン(12)と絶縁板(10)との隙間に浸透し、破線(a)で示すように、封口板(9)の透孔(15)とガスケット(14)との隙間、あるいは、破線(b)のように、正極端子(13)とガスケット(14)や、破線(c)のように、電極ピン(12)と正極端子(13)との隙間から外部に漏出する可能性があるものであり、この液漏れを防止するため、電極ピン(12)の頭部と端子リベット(11)との接触部を環状にレーザー溶接することで封止部(20)を形成し隙間を封止している。 Therefore, the electrolyte in the battery case (2) that has entered from the gap between the lower end portion of the electrode pin (12) and the terminal rivet (11) as indicated by the solid line is the electrode pin (12) and the insulating plate ( 10), and as shown by the broken line (a), the gap between the through hole (15) of the sealing plate (9) and the gasket (14), or the positive terminal as shown by the broken line (b) As shown in (13) and gasket (14) and broken line (c), there is a possibility of leakage from the gap between the electrode pin (12) and the positive terminal (13). For this purpose, the contact portion between the head of the electrode pin (12) and the terminal rivet (11) is annularly laser-welded to form a sealing portion (20) and seal the gap.
したがって、上記構成にすれば、少なくとも端子リベット(11)と電極ピン(12)との隙間から電解液が浸入することを未然に防止でき、電極ピン(12)を経由して外部に液漏れすることを防ぐことができる。なお、本部分の構成については、端子リベット(11)と電極ピン(12)とを一体化形状にすれば溶接する必要をなくすことができる。 Therefore, with the above configuration, the electrolyte can be prevented from entering at least through the gap between the terminal rivet (11) and the electrode pin (12), and the liquid leaks to the outside via the electrode pin (12). Can be prevented. In addition, about the structure of this part, if a terminal rivet (11) and an electrode pin (12) are made into an integrated shape, the need for welding can be eliminated.
また、前記図2と同一部分に同一符号を附した図3に示すように、前記電極ピン(12)の頭部と端子リベット(11)との接触部をレーザー溶接による封止部(20)で封止しても、前記端子リベット(11)の端縁部と絶縁板(10)との間からも実線で示す矢印のように、電解液が浸入する怖れがある。 Further, as shown in FIG. 3 in which the same reference numerals are assigned to the same parts as in FIG. 2, the contact part between the head of the electrode pin (12) and the terminal rivet (11) is sealed by laser welding (20). Even if sealed, there is a fear that the electrolytic solution may enter from between the edge of the terminal rivet (11) and the insulating plate (10) as indicated by the solid line.
上記による前記端子リベット(11)と絶縁板(10)との間隙から電極ピン(12)部分への電解液の浸透を遮断し、前記と同様の各矢印(a)(b)(c)部位からの液漏れを防ぐために、電極ピン(12)を中心として環状に端子リベット(11)と絶縁板(10)との上下の当接面をレーザー照射、あるいは、電磁誘導加熱により摩擦溶融し瞬時に加熱し接合させて、封止部(21)を形成している。 Each of the arrows (a), (b), and (c) portions similar to those described above by blocking the permeation of the electrolytic solution from the gap between the terminal rivet (11) and the insulating plate (10) to the electrode pin (12). In order to prevent liquid leakage from the electrode, the upper and lower contact surfaces of the terminal rivet (11) and the insulating plate (10) are annularly centered around the electrode pin (12), and are instantaneously melted by laser irradiation or electromagnetic induction heating. To form a sealing portion (21).
上記接合構成における封止部(21)によって、万一、端子リベット(11)の端縁部と絶縁板(10)との隙間から電解液が浸入したとしても、これが電極ピン(12)部分にまで至ることを阻止できるものであり、電解液が電極ピン(12)と絶縁板(10)との隙間やガスケット(14)との隙間、さらには、ガスケット(14)と封口板(9)の透孔(15)、あるいは正極端子(13)などとの隙間に浸透し、外部に漏出することを防止することができる。 Even if the electrolyte enters the gap between the end edge of the terminal rivet (11) and the insulating plate (10) by the sealing part (21) in the above-mentioned joining configuration, this does not enter the electrode pin (12) part. It is possible to prevent the electrolyte from reaching the gap between the electrode pin (12) and the insulating plate (10), the gap between the gasket (14), and the gasket (14) and the sealing plate (9). It can be prevented that it penetrates into the gap between the through hole (15) or the positive electrode terminal (13) and leaks outside.
そしてまた、前記と同様に、封口板(9)と絶縁板(10)の端縁部との間から実線で示す矢印のように浸入する電解液についても、前記同様に符号を附した図4に示すように、封口板ブロック(7)における電極ピン(12)を中心にして、環状にこれら各部材の当接面をレーザー照射、あるいは、電磁誘導加熱により摩擦溶融して瞬時に接合し、封止部(22)を設けるようにすれば、封口板(9)の透孔(15)と絶縁板(10)やガスケット(14)との隙間、あるいは、ガスケット(14)と正極端子(13)、または、電極ピン(12)と正極端子(13)との隙間にまで浸透することを阻止でき、前記と同様の各矢印(a)(b)(c)部位から外部に液漏れすることを確実に防ぐことができるものである。 Further, similarly to the above, the electrolyte solution that enters as shown by the solid line arrow between the sealing plate (9) and the edge of the insulating plate (10) is also shown in FIG. As shown in the figure, with the electrode pin (12) in the sealing plate block (7) as the center, the contact surface of each member is annularly bonded by laser irradiation or friction melting by electromagnetic induction heating, If the sealing part (22) is provided, the gap between the through hole (15) of the sealing plate (9) and the insulating plate (10) or the gasket (14), or the gasket (14) and the positive terminal (13 ) Or permeating into the gap between the electrode pin (12) and the positive electrode terminal (13), and leaking to the outside from the respective arrows (a), (b), and (c) as described above. Can be surely prevented.
合成樹脂は、基本的にその樹脂が有する融点以上の温度になれば溶融するが、瞬時に接合するためには、700〜950℃に加熱する必要があるため、上記のようにレーザー照射や電磁誘導加熱により、局部的に絶縁板(10)を形成している合成樹脂を液状化することで金属部材である封口板(9)や端子リベット(11)との接合をおこなうものである。 Synthetic resin basically melts when it reaches a temperature equal to or higher than the melting point of the resin, but in order to be bonded instantaneously, it needs to be heated to 700 to 950 ° C. The synthetic resin forming the insulating plate (10) locally is liquefied by induction heating to join the sealing plate (9) and the terminal rivet (11), which are metal members.
このとき、少なくとも加熱溶融する絶縁板(10)に、融点が190℃以上であるフッ素樹脂を使用することで、レーザーを使用せずとも、電磁誘導加熱により封口板(9)や端子リベット(11)と接合できるものであり、また、前記フッ素樹脂を絶縁板(10)やガスケット(14)などの部材に適用すれば、融点が高いことから、電池ケース(2)と封口板ブロック(7)とのレーザー溶接時における熱に対しても影響を少なくすることができ、樹脂変形を抑制して液漏れを防止することができる効果がある。 At this time, by using a fluororesin having a melting point of 190 ° C. or higher for at least the insulating plate (10) to be heated and melted, the sealing plate (9) and the terminal rivet (11) can be obtained by electromagnetic induction heating without using a laser. The battery case (2) and the sealing plate block (7) have a high melting point if the fluororesin is applied to a member such as an insulating plate (10) or a gasket (14). As a result, it is possible to reduce the influence on the heat at the time of laser welding, and it is possible to prevent resin leakage by suppressing resin deformation.
前記絶縁板(10)やガスケット(14)に使用する合成樹脂としては、前述の樹脂のほか、ポリエーテルサルホン(PES)、ポリフェニレンサルファイド(PPS)、ポリエーテルケトン(PEK)、ポリエーテルケトンケトン(PEKK)、ポリエーテルエーテルケトン(PEEK)、および前記各合成樹脂の複合体も使用可能である。また、封口板(9)に使用する金属としては、前述したアルミニウムのほか、ステンレス、ニッケルおよびその合金、スズおよびその合金を使用することができる。 Synthetic resins used for the insulating plate (10) and gasket (14) include, in addition to the resins described above, polyethersulfone (PES), polyphenylene sulfide (PPS), polyetherketone (PEK), and polyetherketoneketone. (PEKK), polyetheretherketone (PEEK), and composites of the above synthetic resins can also be used. Moreover, as a metal used for a sealing board (9), stainless steel, nickel, its alloy, tin, and its alloy other than the aluminum mentioned above can be used.
上記構成において、封口板(9)と絶縁板(10)およびガスケット(14)をあらかじめ一体に成形しておけば、各部材間の間隙がなくなるので、液漏れの発生をより抑えることができるものである。その後、これもあらかじめ一体化した端子リベット(11)と電極ピン(12)とを封口板(9)の透孔(15)に挿通し、次に、電極ピン(12)の上部に正極端子(13)を嵌挿し、ヘッダー加工により加圧して嵌め固定するようにすれば、封口板ブロック(7)として、さらに強固に一体化することができるものであり、このように形成することで、レーザー照射や電磁誘導加熱処理により接合する場合もより効率よく実施できる利点がある。 In the above configuration, if the sealing plate (9), the insulating plate (10), and the gasket (14) are integrally formed in advance, the gap between the members is eliminated, and therefore the occurrence of liquid leakage can be further suppressed. It is. Thereafter, the terminal rivet (11) and the electrode pin (12), which are also integrated in advance, are inserted into the through hole (15) of the sealing plate (9), and then the positive electrode terminal ( 13) can be inserted and fixed by press-fitting and fixed by header processing, so that the sealing plate block (7) can be integrated more firmly. By forming in this way, the laser There is an advantage that it can be carried out more efficiently when joining by irradiation or electromagnetic induction heat treatment.
なお、前記封口板(9)と絶縁板(10)およびガスケット(14)との一体成形品は、例えば、図5に示すように、あらかじめ金型(23)(24)間に封口板(9)を装着した後、金型(23)(24)を閉じて絶縁板(10)とガスケット(14)とを形成する空間部(25)に樹脂材料を注入し充填することで、図6に示すように、封口板(9)に対して前記絶縁板(10)とガスケット(14)部分とからなる絶縁部分(10´)が一体化された成形品を容易に得ることができる。 The integrally formed product of the sealing plate (9), the insulating plate (10) and the gasket (14) is, for example, a sealing plate (9) between the molds (23) and (24) in advance as shown in FIG. ), The molds (23) and (24) are closed, and the resin material is injected and filled into the space (25) that forms the insulating plate (10) and the gasket (14). As shown, it is possible to easily obtain a molded product in which an insulating portion (10 ′) composed of the insulating plate (10) and the gasket (14) is integrated with the sealing plate (9).
本発明による密閉型電池(1)の封口板ブロック(7)は、以上のように構成されており、電池ケース(2)内に収容されている電極組立体(3)部分からの電解液は、電極ピン(12)を中心として上下部材間を環状に接合した封止部(20)(21)(22)によって、電極ピン(12)の周囲部を経由しての外方への通路が封止されるので、万一、電極ピン(12)や端子リベット(11)、あるいは絶縁板(10)や封口板(9)との各々の隙間に電解液が浸入しても浸透することがなく、封口板ブロック(7)の内部を浸透して外部に液漏れすることを確実に防止することができる。また、同時に、外部から電池ケース(2)内への水分や空気の浸入をも確実に防ぐ効果を有するものである。 The sealing plate block (7) of the sealed battery (1) according to the present invention is configured as described above, and the electrolytic solution from the electrode assembly (3) portion accommodated in the battery case (2) is The sealing part (20) (21) (22) in which the upper and lower members are joined in an annular shape with the electrode pin (12) as the center, the passage to the outside via the peripheral part of the electrode pin (12) Since it is sealed, it can penetrate even if the electrolyte enters the gap between the electrode pin (12), terminal rivet (11), or insulating plate (10) or sealing plate (9). In addition, it is possible to reliably prevent the liquid from leaking outside through the inside of the sealing plate block (7). At the same time, it also has an effect of reliably preventing moisture and air from entering the battery case (2) from the outside.
なお、上記については、1実施例としてリチウムイオン二次電池について説明したが、これに限るものではなく、ニッケル水素電池やリチウムポリマー電池などの二次電池や、アルカリ電池、マンガン電池、リチウム電池などの一次電池でも密閉型電池であればその封口板構成として適用できるものであり、また、電池形状についても前記実施例のような角形に限らず、円筒形状やコイン形、ボタン形や袋形、あるいは小判形状のものにも採用できるものであることは言うまでもない。 In addition, about the above, although the lithium ion secondary battery was demonstrated as one Example, it is not restricted to this, Secondary batteries, such as a nickel metal hydride battery and a lithium polymer battery, An alkaline battery, a manganese battery, a lithium battery, etc. As long as the primary battery is a sealed battery, it can be applied as a sealing plate configuration, and the battery shape is not limited to the square shape as in the above embodiment, but also a cylindrical shape, a coin shape, a button shape, a bag shape, Needless to say, it can also be used in an oval shape.
1 密閉型電池
2 電池ケース
3 電極組立体
4 セパレータ
5 第1の電極板(正極)
6 第2の電極板(負極)
7 封口板ブロック
8 タブ
9 封口板
10 絶縁板
11 端子リベット
12 電極ピン
13 正極端子
14 ガスケット
15 透孔
18 レーザー溶接部
20、21、22 封止部
23、24 金型
25 空間
DESCRIPTION OF
6 Second electrode plate (negative electrode)
7
10 Insulation plate
11 Terminal rivet
12 Electrode pin
13 Positive terminal
14 Gasket
15 Through hole
18 Laser weld
20, 21, 22 Sealing part
23, 24 Mold
25 space
Claims (4)
電池ケースの一端開口を前記封口板で封止し、
前記絶縁板を前記封口板より前記電池ケース内側に配するとともに、前記封口板に重ねてなり、
前記絶縁板の電池ケース内側の面に前記端子リベットを重ねて配し、
前記電極ピンを前記電池ケースの内側から前記端子リベットと前記絶縁板と前記封口板を貫通して外部に突出させ、
前記電極ピンの前記電池ケースの内部の先端を前記端子リベットに重ね、
前記電極ピンの前記電池ケースの外部の先端を加圧し、
前記端子リベットと前記電極ピンとを電気的に接続するとともに前記封口板と前記電極ピンとを電気的に絶縁し、
前記封口板と前記絶縁板、前記絶縁板と前記端子リベット、及び前記端子リベットと前記電極ピンの各当接面を前記電極ピンを取り囲んで環状に加熱接合したことを特徴とする密閉型電池。 Comprising a sealing plate made of a conductor that forms the hand of the electrodes, and the electrode pin which is the other electrode terminal, and the thermal adhesiveness of some synthetic resin forming the insulating plate, a conductive terminal rivet,
Seal one end opening of the battery case with the sealing plate,
The insulating plate is arranged on the inside of the battery case from the sealing plate, and is stacked on the sealing plate.
Arranging the terminal rivets on the inner surface of the battery case of the insulating plate,
The electrode pin penetrates the terminal rivet, the insulating plate, and the sealing plate from the inside of the battery case and protrudes to the outside.
The tip of the electrode pin inside the battery case is overlaid on the terminal rivet,
Pressurizing the outer tip of the battery case of the electrode pin,
Electrically insulates the said electrode pins and said sealing plate with electrically connecting the electrode pins and the terminal rivet,
Sealed battery, wherein said sealing plate and the insulating plate, the insulating plate and the terminal rivet, and was heat-bonding each contact surface of the electrode pin and the terminal rivet annularly surrounds the electrode pin.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007277278A JP5053036B2 (en) | 2007-10-25 | 2007-10-25 | Sealed battery |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007277278A JP5053036B2 (en) | 2007-10-25 | 2007-10-25 | Sealed battery |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2009104971A JP2009104971A (en) | 2009-05-14 |
JP5053036B2 true JP5053036B2 (en) | 2012-10-17 |
Family
ID=40706431
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2007277278A Expired - Fee Related JP5053036B2 (en) | 2007-10-25 | 2007-10-25 | Sealed battery |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP5053036B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20200020173A (en) * | 2018-08-16 | 2020-02-26 | 주식회사 엘지화학 | Rechargeable battery |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101084221B1 (en) | 2009-10-30 | 2011-11-17 | 에스비리모티브 주식회사 | Secondary battery |
TWI425076B (en) | 2011-11-01 | 2014-02-01 | Ind Tech Res Inst | Carbazole derivatives and organic light-emitting diodes comprising the same |
CN106531911A (en) * | 2016-12-23 | 2017-03-22 | 东莞威胜储能技术有限公司 | High-temperature energy storage battery and sealing structure thereof |
TW202141840A (en) | 2020-03-11 | 2021-11-01 | 南韓商Lg化學股份有限公司 | Button type secondary battery |
CN112510327B (en) * | 2020-12-22 | 2022-12-02 | 北京理工大学深圳汽车研究院(电动车辆国家工程实验室深圳研究院) | Power battery and sealing method thereof |
CN112635878A (en) * | 2021-01-19 | 2021-04-09 | 广东至力科技有限公司 | Miniature lithium ion battery with welding protection washer |
CN114050318B (en) * | 2021-10-25 | 2023-08-01 | 惠州锂威新能源科技有限公司 | Steel shell battery pole connection process |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0773861A (en) * | 1993-06-29 | 1995-03-17 | Hokkai Can Co Ltd | Battery |
JP2002164025A (en) * | 2000-11-22 | 2002-06-07 | Matsushita Electric Ind Co Ltd | Square secondary battery |
JP4812173B2 (en) * | 2001-02-02 | 2011-11-09 | パナソニック株式会社 | Battery sealing structure, battery and manufacturing method thereof |
JP4932092B2 (en) * | 2001-06-05 | 2012-05-16 | Necエナジーデバイス株式会社 | Sealed battery |
KR100751310B1 (en) * | 2001-09-24 | 2007-08-22 | 삼성에스디아이 주식회사 | Cap assembly and retangular- type secondary battery therewith |
JP4042439B2 (en) * | 2002-03-18 | 2008-02-06 | トヨタ自動車株式会社 | Laser welded assembly |
US7871725B2 (en) * | 2002-04-15 | 2011-01-18 | Samsung Sdi Co., Ltd. | Secondary battery with enhanced ability to prevent leakage |
KR100601517B1 (en) * | 2004-09-24 | 2006-07-19 | 삼성에스디아이 주식회사 | Secondary battery |
JP5021900B2 (en) * | 2005-02-04 | 2012-09-12 | Necエナジーデバイス株式会社 | Sealed battery |
JP2006313794A (en) * | 2005-05-06 | 2006-11-16 | Asahi Glass Co Ltd | Storage element |
-
2007
- 2007-10-25 JP JP2007277278A patent/JP5053036B2/en not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20200020173A (en) * | 2018-08-16 | 2020-02-26 | 주식회사 엘지화학 | Rechargeable battery |
KR102622370B1 (en) * | 2018-08-16 | 2024-01-09 | 주식회사 엘지에너지솔루션 | Rechargeable battery |
Also Published As
Publication number | Publication date |
---|---|
JP2009104971A (en) | 2009-05-14 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5053036B2 (en) | Sealed battery | |
US7248021B2 (en) | Battery pack with resin integrated substrate and vent | |
KR102245620B1 (en) | Rechargeable battery | |
JP5475206B1 (en) | Prismatic secondary battery | |
US9136524B2 (en) | Secondary battery | |
KR101073891B1 (en) | Circular Secondary Battery | |
JP5777093B2 (en) | Secondary battery and method for manufacturing secondary battery | |
US8673483B2 (en) | Sealed battery | |
KR102283783B1 (en) | Rechargeable battery | |
KR20110036381A (en) | Current interrupting device and sedcondary battery using the same | |
KR102154331B1 (en) | Secondary Battery | |
US10014496B2 (en) | Rechargeable battery | |
KR102047542B1 (en) | Cap assembly manufacturing method and cap assembly therefor | |
KR102348680B1 (en) | Rechargeable battery | |
CN107170947B (en) | Secondary battery and secondary battery assembly | |
CN111129564A (en) | Energy storage device assembling method | |
JP5667589B2 (en) | Non-aqueous electrolyte secondary battery | |
KR102573330B1 (en) | Rechargeable battery | |
KR100659885B1 (en) | Lithium Ion Secondary Battery | |
JP2022141967A (en) | Secondary battery and secondary battery assembly | |
KR102284568B1 (en) | Rechargeable battery | |
JP6304981B2 (en) | Nonaqueous electrolyte secondary battery | |
KR102340113B1 (en) | Rechargeable battery | |
KR20130034284A (en) | Current interrupting device and secondary battery using the same | |
JP5879373B2 (en) | Prismatic secondary battery |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20120120 |
|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20120228 |
|
A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20120412 |
|
TRDD | Decision of grant or rejection written | ||
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20120703 |
|
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 |
|
A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20120725 |
|
R150 | Certificate of patent or registration of utility model |
Ref document number: 5053036 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20150803 Year of fee payment: 3 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
LAPS | Cancellation because of no payment of annual fees |