JP2005142115A - Secondary battery - Google Patents
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- JP2005142115A JP2005142115A JP2003379838A JP2003379838A JP2005142115A JP 2005142115 A JP2005142115 A JP 2005142115A JP 2003379838 A JP2003379838 A JP 2003379838A JP 2003379838 A JP2003379838 A JP 2003379838A JP 2005142115 A JP2005142115 A JP 2005142115A
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- 230000001681 protective effect Effects 0.000 claims description 4
- 238000007789 sealing Methods 0.000 abstract description 11
- 230000005856 abnormality Effects 0.000 abstract description 3
- 230000000630 rising effect Effects 0.000 abstract 3
- 238000010248 power generation Methods 0.000 description 9
- 230000002159 abnormal effect Effects 0.000 description 5
- 239000008151 electrolyte solution Substances 0.000 description 5
- 239000003792 electrolyte Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000007773 negative electrode material Substances 0.000 description 2
- 239000007774 positive electrode material Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- CKFRRHLHAJZIIN-UHFFFAOYSA-N cobalt lithium Chemical compound [Li].[Co] CKFRRHLHAJZIIN-UHFFFAOYSA-N 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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- 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
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- Gas Exhaust Devices For Batteries (AREA)
Abstract
Description
本発明は、二次電池に関し、特に発電要素を収納する密閉ケースに防爆弁が設けられた二次電池に関するものである。 The present invention relates to a secondary battery, and more particularly to a secondary battery in which an explosion-proof valve is provided in a sealed case that houses a power generation element.
近年の電子機器、特に携帯電話、ノート型パーソナルコンピュータ、ビデオカメラなどの携帯用情報機器の発達や普及に伴い、小型、軽量で、かつエネルギー密度が高い二次電池の需要が大きく伸張し、なお、高性能化の検討がなされている。このような二次電池として特にリチウムイオン二次電池が、その高性能のため注目されている。 With the development and popularization of portable information devices such as mobile phones, notebook personal computers, and video cameras in recent years, the demand for secondary batteries that are small, lightweight, and have high energy density has greatly increased. Considering higher performance. As such a secondary battery, a lithium ion secondary battery is particularly attracting attention because of its high performance.
リチウムイオン二次電池における発電要素の一般的な構造は、リチウム−コバルト複合酸化物などの正極活物質粉末、導電性粉末、及びバインダからなる正極活物質層を、アルミニウム箔からなる正極集電体表面に形成してなる正極、炭素系の負極活物質粉末、及びバインダからなる負極活物質層を、銅箔からなる負極集電体表面に形成してなる負極を、多孔質のフィルムからなるセパレータを介して重ね、電解液を含浸したものである。 A general structure of a power generation element in a lithium ion secondary battery is that a positive electrode active material layer made of a positive electrode active material powder such as lithium-cobalt composite oxide, a conductive powder, and a binder, and a positive electrode current collector made of an aluminum foil. A separator made of a porous film, a negative electrode formed on the surface of a negative electrode current collector made of copper foil, a negative electrode active material layer made of a positive electrode formed on the surface, a carbon-based negative electrode active material powder, and a binder And are impregnated with an electrolytic solution.
そして、二次電池としての容量増加のため、正極及び負極の対を複数積層した積層素子や、帯状に形成した正極及び負極を巻き回した巻回素子などが、発電要素として用いられているが、いずれの場合も電解液を用いるので、このような発電要素を金属のケースに封入して、電解液が外部に漏れないようにしている。 In order to increase the capacity of the secondary battery, a laminated element in which a plurality of pairs of positive and negative electrodes are stacked, a winding element in which a positive electrode and a negative electrode formed in a strip shape are wound, and the like are used as power generation elements. In any case, since an electrolytic solution is used, such a power generation element is enclosed in a metal case so that the electrolytic solution does not leak to the outside.
ところで、前記のような二次電池においては、短絡などの異常により、電解液が分解してガスが発生することがある。これによってケース内の圧力が上昇した場合に対処するため、防爆弁を設け、一定以上の圧力になると、防爆弁が開放または破断されて、内部の圧力を開放することで、事故を未然に防止している。 By the way, in the secondary battery as described above, the electrolyte may be decomposed and gas may be generated due to an abnormality such as a short circuit. In order to cope with the case where the pressure in the case rises, an explosion-proof valve is provided. When the pressure exceeds a certain level, the explosion-proof valve is opened or broken and the internal pressure is released to prevent accidents. doing.
特許文献１には、このような例として、金属ケースの開口部を閉塞している封口板に凹部を設け、凹部の底の部分に設けられた、溝によって囲まれた膨出部を、防爆弁として用いる技術が開示されている。
In
図２は、特許文献１に開示された防爆弁を有する、二次電池のケースの例を示す斜視図である。また、図３は、特許文献１に開示されている、防爆弁の例を示す図で、図３（ａ）はケースの平面図、図３（ｂ）は防爆弁の部分の拡大図、図３（ｃ）はＡＡ断面図である。図２及び図３において、１はケース、２は封口板、３は端子、７は防爆弁、８は凹部、９は溝、１０は膨出部である。
FIG. 2 is a perspective view showing an example of a case of a secondary battery having the explosion-proof valve disclosed in
この例においては、図３（ｃ）に示したように、凹部８の底に設けられた膨出部１０は、溝９により周囲と仕切られているので、図における下側、つまりケースの内側から、一定以上の圧力が加わった場合に、溝９の部分が破断する。これによってケース１の内部の圧力が開放されるので、ケース１自体の破裂を未然に防止できる。
In this example, as shown in FIG. 3 (c), the
ところが、このような防爆弁に加わる圧力は、必ずしも電解液の分解ガスによるものばかりではない。具体的に説明すると、ケースに収納されている発電要素は、ケース内における位置が必ずしも固定されているわけではなく、ある程度の位置ずれが避けられない。このため、二次電池の落下や急激な揺動により、防爆弁と発電要素の間の空間を占める気体が、急激に圧縮され、防爆弁が瞬間的に加圧されることがある。 However, the pressure applied to such an explosion-proof valve is not necessarily due to the decomposition gas of the electrolytic solution. Specifically, the position of the power generation element housed in the case is not necessarily fixed in the case, and a certain amount of positional deviation is unavoidable. For this reason, the gas occupying the space between the explosion-proof valve and the power generation element may be rapidly compressed and the explosion-proof valve may be momentarily pressurized due to the fall or sudden swing of the secondary battery.
このように、ケース内部で異常事態がまったく起こっていないにも関わらず、防爆弁が加圧され、作動してしまう場合がある。防爆弁が作動すると、内部の電解液が漏出するので、もはや二次電池としては使用不能となってしまう。しかしながら、特許文献１には、このような不具合に対処する技術については、十分な開示がなされているとは言い難い。
In this way, the explosion-proof valve may be pressurized and actuated even though no abnormal situation has occurred inside the case. When the explosion-proof valve is activated, the internal electrolyte leaks out, so it can no longer be used as a secondary battery. However, it is difficult to say that
従って、本発明の課題は、発電要素をケースに密閉した構造の二次電池において、内部の異常事態に起因する圧力上昇が起こった場合は確実に作動し、異常事態とは無関係で瞬間的な圧力上昇では作動しない防爆弁を備えた二次電池を提供することにある。 Therefore, the problem of the present invention is that a secondary battery having a structure in which a power generation element is sealed in a case operates reliably when a pressure increase due to an internal abnormal situation occurs, and is instantaneous regardless of the abnormal situation. An object of the present invention is to provide a secondary battery having an explosion-proof valve that does not operate when the pressure increases.
本発明は、二次電池のケース内部における、急激かつ瞬間的な圧力上昇は、前記のように、二次電池の機能を損なうような異常事態に起因することが、極めて少ないという観点から、圧力を緩衝し得る構造を付加することを検討した結果なされたものである。 From the viewpoint that the sudden and instantaneous pressure increase inside the case of the secondary battery is very rarely caused by an abnormal situation that impairs the function of the secondary battery as described above. It was made as a result of examining the addition of a structure capable of buffering.
即ち、本発明は、ケースに設けられた凹部と、前記凹部に設けられた第一の防爆弁と、前記凹部の開口部に設けられた第二の防爆弁を有し、前記第一の防爆弁と前記第二の防爆弁との間に密閉空間が介在することを特徴とする二次電池である。 That is, the present invention includes a recess provided in the case, a first explosion-proof valve provided in the recess, and a second explosion-proof valve provided in the opening of the recess, and the first explosion-proof valve. The secondary battery is characterized in that a sealed space is interposed between the valve and the second explosion-proof valve.
また、本発明は、前記第二の防爆弁が、前記凹部の開口部に取り付けられた保護膜であることを特徴とする、前記の二次電池である。 Moreover, this invention is said secondary battery characterized by the said 2nd explosion-proof valve being a protective film attached to the opening part of the said recessed part.
本発明の二次電池は、密閉空間を介して二つの防爆弁が設けられていて、介在する密閉空間は、発電要素の急激な移動などに伴う、急激かつ瞬間的な圧力上昇を緩衝する機能を有する。つまり、ケース内部の圧力上昇で、内側の防爆弁、即ち、第一の防爆弁が外側に膨らむと、密閉空間が圧縮され、ケース内部と密閉空間の圧力の平衡状態が現出する。 The secondary battery of the present invention is provided with two explosion-proof valves via a sealed space, and the interposed sealed space functions to buffer a sudden and instantaneous pressure increase caused by a sudden movement of the power generation element. Have That is, when the inner explosion-proof valve, that is, the first explosion-proof valve bulges outward due to an increase in pressure inside the case, the sealed space is compressed, and an equilibrium state between the pressure inside the case and the sealed space appears.
この際、第一の防爆弁の作動圧力は、ケース内部の圧力と密閉空間の圧力の差になるので、急激かつ瞬間的な圧力上昇で作動することが極めて少なくなる。これに対し、電解液の分解などによる圧力上昇は、瞬間的に起こったり、瞬間的に低下したりすることがないので、本発明の二次電池の防爆弁が、本来の防爆弁として機能しないことはない。 At this time, since the operating pressure of the first explosion-proof valve is a difference between the pressure inside the case and the pressure in the sealed space, it is extremely rare to operate with a sudden and instantaneous pressure increase. On the other hand, the pressure increase due to the decomposition of the electrolyte does not occur instantaneously or decrease instantaneously, so the explosion-proof valve of the secondary battery of the present invention does not function as the original explosion-proof valve. There is nothing.
また、第二の防爆弁は、凹部が設けられたケースの表面に、シート状の材料、つまり保護膜を適当な接着強度で貼り付けるという方法で設けてもよいので、二つの防爆弁を設けても製造コストの増加は僅かであることも本発明の特徴である。なお、一般的には、第一の防爆弁の方が先に作動するので、瞬間的な圧力上昇で第一の防爆弁が作動しても、第二の防爆弁は作動せず、電解液の漏出を防止できるという効果がある。 In addition, the second explosion-proof valve may be provided by a method of sticking a sheet-like material, that is, a protective film with an appropriate adhesive strength on the surface of the case provided with the recess, so two explosion-proof valves are provided. However, it is also a feature of the present invention that the increase in manufacturing cost is slight. In general, since the first explosion-proof valve is activated first, even if the first explosion-proof valve is activated by an instantaneous pressure increase, the second explosion-proof valve is not activated, and the electrolyte solution There is an effect that can prevent leakage.
本発明の二次電池における防爆弁は、基本的に発電要素を収納したケースに、凹部と、凹部と凹部の開口部に設けられた二つの防爆弁と、二つの防爆弁で密閉された空間があればよい。つまり、前記のように、第二の防爆弁を、凹部の開口部に貼り付けた保護膜という構造にしてもよいし、特許文献１に開示されている構造としてもよい。単に貫通孔を設けて、適当な接合強度で栓を嵌合した構造とすることも可能である。
The explosion-proof valve in the secondary battery of the present invention is basically a case in which a power generation element is housed, a recess, two explosion-proof valves provided at the opening of the recess and the recess, and a space sealed by the two explosion-proof valves. If there is. That is, as described above, the second explosion-proof valve may be structured as a protective film attached to the opening of the recess, or may be structured as disclosed in
なお、二つの防爆弁の作動圧力は、同一としてもよいが、本発明の目的から、第二の防爆弁の作動圧力を、第一の防爆弁よりも高く設定した方がよい。また、防爆弁を設ける位置は特に限定されないが、製造工程を考慮すると、特許文献１の例のように、封口板に設けるのが望ましい。
The operating pressures of the two explosion-proof valves may be the same, but for the purposes of the present invention, it is better to set the operating pressure of the second explosion-proof valve higher than that of the first explosion-proof valve. Moreover, although the position which provides an explosion-proof valve is not specifically limited, when a manufacturing process is considered, it is desirable to provide in a sealing board like the example of
次に、具体的な例を挙げ、本発明について、さらに詳しく説明する。 Next, the present invention will be described in more detail with specific examples.
図１は、二次電池のケースの封口板に本発明の防爆弁を設けた例を示す図で、図１（ａ）はケースの平面図、図１（ｂ）はＡＡ断面図である。図１において、４は第一の防爆弁、５は第二の防爆弁、６は密閉空間である。 FIG. 1 is a view showing an example in which an explosion-proof valve of the present invention is provided on a sealing plate of a case of a secondary battery, FIG. 1 (a) is a plan view of the case, and FIG. 1 (b) is an AA cross-sectional view. In FIG. 1, 4 is a first explosion-proof valve, 5 is a second explosion-proof valve, and 6 is a sealed space.
この例では、第一の防爆弁４は、封口板の凹部の底部に設けられ、溝で仕切られた膨出部で構成され、第二の防爆弁５はアルミニウム箔を、開口部に接着剤を用いて貼り付けた構造である。ここでは、二つの防爆弁の動作圧力を同一に設定した。
In this example, the first explosion-
このような構造の防爆弁を備えた二次電池を作製して、１．６ｍの高さから自由落下させるという方法で落下テストを行い、防爆弁の作動の有無を調べたところ、防爆弁が作動したのはまったく見られなかった。比較ために、第二の防爆弁を設けない二次電池を準備し、同様のテストを行ったところ、１．６％の比率で、防爆弁の作動が見られた。 A secondary battery equipped with an explosion-proof valve with such a structure was manufactured, and a drop test was conducted by dropping it from a height of 1.6 m. The presence of the explosion-proof valve was examined. I didn't see it working at all. For comparison, a secondary battery without a second explosion-proof valve was prepared and a similar test was performed. As a result, the explosion-proof valve was activated at a rate of 1.6%.
なお、設定した圧力以上の領域での、防爆弁の作動を確認するために、本実施例の二次電池を加熱したところ、全数について、設定圧力近傍で防爆弁が作動することが確認できた。つまり、本発明の二次電池の防爆弁は、落下などによる急激かつ瞬間的な圧力上昇では作動せず、発熱などの異常事態による圧力上昇では、確実に作動することが確認できた。 In addition, in order to confirm the operation of the explosion-proof valve in the region above the set pressure, when the secondary battery of this example was heated, it was confirmed that the explosion-proof valve was operated near the set pressure for all the batteries. . That is, it was confirmed that the explosion-proof valve of the secondary battery of the present invention did not operate with a sudden and instantaneous pressure increase due to a drop or the like, but operated reliably with a pressure increase due to an abnormal situation such as heat generation.
なお、ここでは、二次電池を例に挙げて説明したが、電気二重層キャパシタなどの、同様の構造を有する電気化学セルにも、本発明を適用できることは明らかである。 Although the secondary battery has been described as an example here, it is apparent that the present invention can be applied to an electrochemical cell having a similar structure such as an electric double layer capacitor.
１ ケース
２ 封口板
３ 端子
４ 第一の防爆弁
５ 第二の防爆弁
６ 密閉空間
７ 防爆弁
８ 凹部
９ 溝
１０ 膨出部
DESCRIPTION OF
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003379838A JP4463529B2 (en) | 2003-11-10 | 2003-11-10 | Secondary battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003379838A JP4463529B2 (en) | 2003-11-10 | 2003-11-10 | Secondary battery |
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| Publication Number | Publication Date |
|---|---|
| JP2005142115A true JP2005142115A (en) | 2005-06-02 |
| JP4463529B2 JP4463529B2 (en) | 2010-05-19 |
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| JP2003379838A Expired - Lifetime JP4463529B2 (en) | 2003-11-10 | 2003-11-10 | Secondary battery |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005332824A (en) * | 2004-05-19 | 2005-12-02 | Samsung Sdi Co Ltd | Secondary battery |
| WO2010021211A1 (en) | 2008-08-20 | 2010-02-25 | トヨタ自動車株式会社 | Battery |
| CN101685850A (en) * | 2008-09-26 | 2010-03-31 | 深圳市比克电池有限公司 | Lithium battery buffering explosion protection device and explosion protection lithium battery |
| EP2388846A1 (en) * | 2010-05-20 | 2011-11-23 | SB LiMotive Co., Ltd. | Secondary battery |
| JP2012156489A (en) * | 2011-01-06 | 2012-08-16 | Mitsubishi Electric Corp | Storage element |
| US20120219834A1 (en) * | 2011-02-18 | 2012-08-30 | Jeongman Park | Secondary battery |
| JP2013089375A (en) * | 2011-10-14 | 2013-05-13 | Nissan Motor Co Ltd | Vent plug of sealed battery |
| JP2013191542A (en) * | 2012-02-14 | 2013-09-26 | Gs Yuasa Corp | Power storage element |
| JP2015192020A (en) * | 2014-03-28 | 2015-11-02 | 新神戸電機株式会社 | lithium ion capacitor |
| JP2016201368A (en) * | 2012-02-14 | 2016-12-01 | 株式会社Ｇｓユアサ | Electricity storage element |
| CN107316956A (en) * | 2016-04-26 | 2017-11-03 | 宁德时代新能源科技股份有限公司 | Explosion-proof assembly and secondary battery top cap |
| JP2020056445A (en) * | 2018-10-01 | 2020-04-09 | 大日本印刷株式会社 | Valve structure, housing body having it, and power storage device with valve structure |
| WO2021068721A1 (en) * | 2019-10-10 | 2021-04-15 | 宁德新能源科技有限公司 | Housing, battery, and electronic device |
| JP2023529045A (en) * | 2021-04-16 | 2023-07-07 | 寧徳時代新能源科技股▲分▼有限公司 | BATTERY CELL, BATTERY, POWER CONSUMING DEVICE, BATTERY CELL MANUFACTURING METHOD AND APPARATUS |
| US12027722B2 (en) | 2019-10-10 | 2024-07-02 | Ningde Amperex Technology Limited | Housing, battery, and electronic apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109546051B (en) * | 2018-11-02 | 2021-09-17 | 襄阳全系康动力机械有限责任公司 | Mining explosion-proof power pack |
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| JP4632862B2 (en) * | 2004-05-19 | 2011-02-16 | 三星エスディアイ株式会社 | Secondary battery |
| JP2005332824A (en) * | 2004-05-19 | 2005-12-02 | Samsung Sdi Co Ltd | Secondary battery |
| WO2010021211A1 (en) | 2008-08-20 | 2010-02-25 | トヨタ自動車株式会社 | Battery |
| KR101059654B1 (en) | 2008-08-20 | 2011-08-25 | 도요타지도샤가부시키가이샤 | battery |
| RU2462795C2 (en) * | 2008-08-20 | 2012-09-27 | Тойота Дзидося Кабусики Кайся | Battery |
| US8354181B2 (en) | 2008-08-20 | 2013-01-15 | Toyota Jidosha Kabushiki Kaisha | Battery |
| CN101685850A (en) * | 2008-09-26 | 2010-03-31 | 深圳市比克电池有限公司 | Lithium battery buffering explosion protection device and explosion protection lithium battery |
| US9065113B2 (en) | 2010-05-20 | 2015-06-23 | Samsung Sdi Co., Ltd. | Secondary battery with film covering safety vent |
| EP2388846A1 (en) * | 2010-05-20 | 2011-11-23 | SB LiMotive Co., Ltd. | Secondary battery |
| JP2012156489A (en) * | 2011-01-06 | 2012-08-16 | Mitsubishi Electric Corp | Storage element |
| US20120219834A1 (en) * | 2011-02-18 | 2012-08-30 | Jeongman Park | Secondary battery |
| JP2013089375A (en) * | 2011-10-14 | 2013-05-13 | Nissan Motor Co Ltd | Vent plug of sealed battery |
| JP2013191542A (en) * | 2012-02-14 | 2013-09-26 | Gs Yuasa Corp | Power storage element |
| JP2016201368A (en) * | 2012-02-14 | 2016-12-01 | 株式会社Ｇｓユアサ | Electricity storage element |
| JP2015192020A (en) * | 2014-03-28 | 2015-11-02 | 新神戸電機株式会社 | lithium ion capacitor |
| CN107316956A (en) * | 2016-04-26 | 2017-11-03 | 宁德时代新能源科技股份有限公司 | Explosion-proof assembly and secondary battery top cap |
| CN107316956B (en) * | 2016-04-26 | 2023-04-18 | 宁德时代新能源科技股份有限公司 | Explosion-proof assembly and secondary battery top cap |
| JP2020056445A (en) * | 2018-10-01 | 2020-04-09 | 大日本印刷株式会社 | Valve structure, housing body having it, and power storage device with valve structure |
| JP7379812B2 (en) | 2018-10-01 | 2023-11-15 | 大日本印刷株式会社 | Valve structure, container including the same, and electricity storage device with valve structure |
| WO2021068721A1 (en) * | 2019-10-10 | 2021-04-15 | 宁德新能源科技有限公司 | Housing, battery, and electronic device |
| US12027722B2 (en) | 2019-10-10 | 2024-07-02 | Ningde Amperex Technology Limited | Housing, battery, and electronic apparatus |
| JP2023529045A (en) * | 2021-04-16 | 2023-07-07 | 寧徳時代新能源科技股▲分▼有限公司 | BATTERY CELL, BATTERY, POWER CONSUMING DEVICE, BATTERY CELL MANUFACTURING METHOD AND APPARATUS |
| JP7418597B2 (en) | 2021-04-16 | 2024-01-19 | 寧徳時代新能源科技股▲分▼有限公司 | Battery cells, batteries, power consumption equipment, manufacturing methods and devices for battery cells |
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| JP4463529B2 (en) | 2010-05-19 |
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