JP4061056B2 - Battery pack - Google Patents

Battery pack Download PDF

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Publication number
JP4061056B2
JP4061056B2 JP2001367299A JP2001367299A JP4061056B2 JP 4061056 B2 JP4061056 B2 JP 4061056B2 JP 2001367299 A JP2001367299 A JP 2001367299A JP 2001367299 A JP2001367299 A JP 2001367299A JP 4061056 B2 JP4061056 B2 JP 4061056B2
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Japan
Prior art keywords
electrode
tab
battery
protection circuit
circuit board
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JP2003168407A (en
Inventor
秀朗 安井
勉 松井
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Toshiba Corp
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Toshiba Corp
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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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  • Battery Mounting, Suspending (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は、二次電池からなる電池セルを収納した電池本体と該電池本体の保護回路を搭載した保護回路基板とを接続してなる電池パックに関する。
【０００２】
【従来の技術】
携帯電話機等の電源に使用される二次電池は、一般に、複数の電池セルをシールして収納した電池本体と、電池セルを過放電、過充電、過電流から保護する保護回路を搭載した保護回路基板（プロテクション・サーキット・モジュール）とを具備した電池パックとして構成される。ここで上記保護回路基板は、そのランド部（接続電極）に電池本体から引出された電源タブをスポット溶接することで電池本体と接続される。そして電池本体は保護回路基板を経由して負荷に電力を供給する。
【０００３】
具体的には、図３（ａ）および（ｂ）に示すように、電池本体１の端部１ａから延出したテラス部２から引き出される電極タブ３ａ,３ｂの先端側下面に、中間タブ４ａ,４ｂの一端側上面がそれぞれスポット溶接で接続される。さらに、中間タブ４ａ,４ｂの他端側下面に保護回路基板５の表面に設けられた接続電極がスポット溶接で接続される。
【０００４】
そして、中間タブ４ａ,４ｂは矢印Ａの方向に折り曲げられ、電極タブ３ａ,３ｂは矢印Ｂの方向に折り曲げられて、保護回路基板５は、図３（ｃ）に示すように、テラス部２の上方のスペースに配置される。なお、図３（ｃ）中、スペーサ６ａは中間タブ４ａ,４ｂの折り曲げを規定し、絶縁板６ｂは折り曲げられた中間タブ４ａ,４ｂに挟持されて、保護回路基板５の表面に実装された回路部品が電極タブ３ａ,３ｂ等に接触・短絡することを防止する。さらにテラス部２の底面から、テラス部２を覆って電池本体１の上面に亘って貼り付けられた絶縁紙７は、保護回路基板５、電極タブ３ａ,３ｂ、中間タブ４ａ,４ｂが外部と短絡することを防止するためのものである。
【０００５】
上記中間タブ４ａと保護回路基板５の接続電極との間のスポット溶接は、図４（ａ）に示すように、たとえば、保護回路基板５上に近接して並ぶ二つの長方形状のランド８ａ,８ｂからなる接続電極８に予め中間タブ４ａと同種の中間部材９ｃを半田付けしておき、それらのランド８ａ,８ｂ上に上記中間部材９ｃを介して中間タブ４ａを重ね合わせる。そしてこの中間タブ４ａの上からスポット溶接電極９ａ,９ｂを当接させて中間タブ４ａと中間部材９ｃとをスポット溶接することにより行われる。中間タブ４ｂのスポット溶接も同様である。
【０００６】
【発明が解決しようとする課題】
しかしながら上記スポット溶接を行う場合、一般的にはスポット溶接電極９ａ,９ｂがランド８ａ,８ｂの直上に位置付けられるので、スポット溶接電極９ａ,９ｂ直下に位置する半田が加熱溶融して飛散することがある。このため上記スポット溶接後に、作業者がルーペを用いて目視等で飛散した半田を除去する必要が生じ、電池パックの製造コスト低減を阻害している。
【０００７】
本発明は、上記保護回路基板の接続電極に電極タブをスポット溶接するに際して、上述した半田の飛散を確実に防止することのできる簡易な構造の電池パックを提供することを目的とする。
【０００８】
【課題を解決するための手段】
上記目的を達成するために本発明によれば、請求項１では、電池セルを収納した電池本体と、この電池本体の保護回路を搭載した保護回路基板とを具備した電池パックにおいて、前記保護回路基板に設けられた接続電極と、前記電池本体から引出された前記電池セルの電極タブと、前記接続電極および前記電極タブとを溶接してなる中間タブからなり、前記接続電極は前記中間タブを介してスポット溶接用の溶接電極が当接する部位を除く領域に形成したランドからなる電極パターンを形成した電池パックが提供される。
【０００９】
このような構成を有する電池パックであれば、中間タブがスポット溶接される保護回路基板の接続電極が、スポット溶接用の溶接電極が当接する位置の直下を避けて設けられたランドからなる電極パターン形状となっているので、溶接電極からの熱が接続電極に直接加わることがないので、接続電極上の半田が飛散することがない。
【００１０】
【発明の実施の形態】
以下、図面を参照して、本発明の実施形態に係る電池パックを説明する。
図１は、本発明に係る電池パックの一実施形態の平面概略構成図である。なお、従来の電池パックと同一の機能を有する構成要素には、同一の符号を付してその説明を省略する。
【００１１】
電池本体１のテラス部２の端部から延出した電極タブ３ａ,３ｂは、予めスポット溶接によりＬ字型の中間タブ４ａ,４ｂにそれぞれ接続される。これらの中間タブ４ａ,４ｂは、電極タブ３ａ,３ｂの材質と同じものからなり、ニッケル水素（Ｎi-ＭＨ）電池においては、正極側のタブはニッケルで、また負極側のタブはアルミニウムで構成される。
【００１２】
この中間タブ４ａと保護回路基板５の接続電極１８との接続を説明する。
図２は中間タブ４ａと保護回路基板５の接続電極１８と概略構成を示す図であり、図２（ａ）は、接続電極１８に予め接続した溶接用の中間部材９ｃ上に中間タブ４ａを当接させた状態を示す。接続電極１８は、保護回路基板５の表面に設けられ、概略長方形状を二方向の中心軸で分割してなる四つのランド１８ａ〜１８ｄからなる。なお、図２（ａ）中の１８ｅは、接続電極１８を保護回路基板５の図示しない回路部に接続する印刷配線である。
【００１３】
図２（ｂ）は図２（ａ）のＸ−Ｘ断面を示す。接続電極１８に対する中間タブ４ａのスポット溶接は、ランド１８ａ〜１８ｄの上方に中間部材（Ｎiプレート）９ｃを介して重ね合わせられた中間タブ４ａに、スポット溶接電極９ａ,９ｂの先端を当接させて行われる。尚、一対のスポット溶接電極９ａ,９ｂは、図２（ａ）〜（ｃ）に示すように、ランド１８ａとランド１８ｃとの間の間隙１８ｆの上方に位置し、スポット溶接電極９ｂはランド１８ｂと１８ｄとの間の間隙１８ｇの上方に位置するように配置される。換言すれば前記接続電極１８のランド１８ａ〜１８ｄは、スポット溶接電極９ａ,９ｂが当接する部位の直下を避けて設けられている。中間部材９ｃは、溶接対象とする中間タブ４ａと同じ材料のものからなり、ここではニッケル板で構成される。またその厚さは、たとえば０.１５ｍｍである。
【００１４】
この状態でスポット溶接電極９ａ,９ｂを駆動して中間タブ４ａを中間部材９ｃにスポット溶接すると、その溶接電流がランド１８ａ〜１８ｄの直上を流れることがないので、溶接熱がランド１８ａ〜１８ｄ上に伝わり難い。この結果、ランド１８ａ〜１８ｄ上に中間部材９ｃを接続している半田が溶融して飛散するような不具合が生じることながない。中間タブ４ｂの保護回路基板５に対するスポット溶接も同様である。但し、この場合、中間部材９ｃとしてはアルミニウムが用いられる。
【００１５】
なお、中間部材９ａ,９ｂの厚さを０.１５ｍｍから０.３ｍｍに厚くすると、中間部材９ａ,９ｂの熱容量が増大するため、半田の加熱がさらに防止され、半田の飛散もさらに低減されることが、発明者の実験によって確かめられた。
なお、図１（ａ）中の１０ａ〜１０ｅは、電池パックを図示しない外部負荷に接続するリード線１１ａ〜１１ｅを半田付けするランド部であり、１２はリード線１１ａ〜１１ｅを上記外部負荷に接続するコネクタであり、何れも、保護回路基板５と中間タブ４ａ,４ｂ（電極タブ）との接続に先立ち、保護回路基板５に接続されている。
【００１６】
前記のようにして保護回路基板５を中間タブ４ａ、４ｂに接続すると、半田の飛散によって半田ボールが生じることがないので、従来のように半田ボールの発生をルーペ等で目視して検査し、半田ボールを除去する作業を行わずして、次の電池パック組立て作業を行うことができる。
すなわち、半田ボールの検査・除去作業を行わずして、保護回路基板５に接続された中間タブ４ａ,４ｂを電極タブ３ａ,３ｂにそれぞれスポット溶接して、保護回路基板５を電池本体１に接続する作業に移ることができる。なお、このとき、図１（ａ）に示すように、電極タブ３ａ,３ｂに対して中間タブ４ａ,４ｂのＬ字型の底辺を位置合わせすることによって、電池本体１に対して保護回路基板５の取付け位置を設定することができる。
【００１７】
そして、上記接続が行われた後、絶縁板６ｂがテラス部２の上面に取付けられる。さらに、保護回路基板５を図３（ｃ）に示すように、テラス部２の上方に配置するため、中間タブ４ａ,４ｂと電極タブ３ａ,３ｂとは、図３（ｂ）に示すように、それぞれ矢印Ａ,Ｂの方向に折り曲げられる。このとき、スペーサ６ａを用いて中間タブ４ａ、４ｂの折り曲げを規定する。
【００１８】
図１（ｂ）は、各中間タブ４ａ,４ｂと各電極タブ３ａ,３ｂとが折り曲げられて、保護回路基板５がテラス部２の上方に位置した状態で、さらに、保護回路基板５と各中間タブ４ａ,４ｂと各電極タブ３ａ,３ｂとを絶縁紙７で覆った状態の電池パック１の平面構成を示す。
なお、本発明は上述した実施形態に限定されるものではなく、その趣旨を逸脱しない範囲で、適宜変形して実施することができる。
【００１９】
【発明の効果】
以上説明したように本発明の電池パックによれば、電池本体から引き出された電極タブに接続される中間タブを、保護回路基板の接続電極に予め接続されている中間部材にスポット溶接する際、上記接続電極のランドがスポット溶接電極が当接する部位を避けた位置にランドを設けたパターン形状をなしているので、接続電極に中間部材を接続している半田がその溶接熱によって飛散することがない。従って半田の飛散による不具合を生じることのない電池パックの提供が可能となる。しかも電池パックの製造コストを低減することができるという、実用上極めて重要な効果を得ることができる。
【図面の簡単な説明】
【図１】本発明に係る電池パックの一実施形態の平面概略構成図である。
【図２】本発明に係る電池パックが備える印刷基板の接続電極に中間タブをスポット溶接電極を用いてスポット溶接するときの様子を模式的に示す図である。
【図３】電池パック、電極タブ、中間タブおよび印刷基板の接続の概略構成を示す図である。
【図４】従来の電池パックが有する印刷基板の接続電極に中間タブをスポット溶接電極を用いてスポット溶接したときの不具合を説明するための図である。
【符号の説明】
１ 電池本体
２ テラス部
３ａ,３ｂ 電極タブ
４ａ,４ｂ 中間タブ
９ｃ 中間部材
５ 保護回路基板
１８ 接続電極
１８ａ〜１８ｄ ランド部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a battery pack formed by connecting a battery main body containing a battery cell made of a secondary battery and a protection circuit board on which a protection circuit for the battery main body is mounted.
[0002]
[Prior art]
Secondary batteries used for power supplies such as cellular phones generally have a battery body that seals and stores multiple battery cells, and a protection circuit that protects the battery cells from overdischarge, overcharge, and overcurrent. The battery pack includes a circuit board (protection circuit module). Here, the protection circuit board is connected to the battery body by spot welding a power tab drawn out from the battery body to the land portion (connection electrode). The battery body supplies power to the load via the protection circuit board.
[0003]
Specifically, as shown in FIGS. 3 (a) and 3 (b), the intermediate tab 4a is formed on the lower surface of the tip side of the electrode tabs 3a and 3b drawn from the terrace portion 2 extending from the end 1a of the battery body 1. , 4b are connected to each other by spot welding. Further, connection electrodes provided on the surface of the protection circuit board 5 are connected to the lower surfaces of the other ends of the intermediate tabs 4a and 4b by spot welding.
[0004]
Then, the intermediate tabs 4a and 4b are bent in the direction of the arrow A, the electrode tabs 3a and 3b are bent in the direction of the arrow B, and the protection circuit board 5 has the terrace portion 2 as shown in FIG. It is arranged in the space above. In FIG. 3C, the spacer 6a defines the bending of the intermediate tabs 4a and 4b, and the insulating plate 6b is sandwiched between the bent intermediate tabs 4a and 4b and mounted on the surface of the protective circuit board 5. The circuit component is prevented from contacting / short-circuiting to the electrode tabs 3a, 3b, etc. Further, the insulating paper 7 that is attached from the bottom surface of the terrace portion 2 to the top surface of the battery body 1 covering the terrace portion 2 has the protection circuit board 5, the electrode tabs 3a and 3b, and the intermediate tabs 4a and 4b. This is to prevent a short circuit.
[0005]
Spot welding between the intermediate tab 4a and the connection electrode of the protection circuit board 5 is performed, for example, as shown in FIG. 4A, for example, two rectangular lands 8a, An intermediate member 9c of the same type as the intermediate tab 4a is soldered to the connection electrode 8 made of 8b in advance, and the intermediate tab 4a is overlaid on the lands 8a, 8b via the intermediate member 9c. Then, spot welding electrodes 9a and 9b are brought into contact with each other from above the intermediate tab 4a, and the intermediate tab 4a and the intermediate member 9c are spot-welded. The same applies to spot welding of the intermediate tab 4b.
[0006]
[Problems to be solved by the invention]
However, when spot welding is performed, the spot welding electrodes 9a and 9b are generally positioned immediately above the lands 8a and 8b, so that the solder positioned immediately below the spot welding electrodes 9a and 9b may be heated and melted and scattered. is there. For this reason, after the spot welding, it is necessary for an operator to remove the solder scattered by visual observation or the like using a magnifying glass, which hinders a reduction in manufacturing cost of the battery pack.
[0007]
An object of the present invention is to provide a battery pack having a simple structure capable of reliably preventing the above-described solder scattering when spot welding an electrode tab to a connection electrode of the protection circuit board.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, according to the present invention, in claim 1, in a battery pack comprising a battery body housing a battery cell and a protection circuit board on which a protection circuit for the battery body is mounted, the protection circuit A connection electrode provided on a substrate; an electrode tab of the battery cell drawn out from the battery body; and an intermediate tab formed by welding the connection electrode and the electrode tab. The connection electrode includes the intermediate tab. There is provided a battery pack having an electrode pattern formed of lands formed in a region excluding a portion where a welding electrode for spot welding contacts .
[0009]
If the battery pack having such a configuration, the connection electrode of the protection circuit board tabs between middle is spot welding, consists of a land that is provided to avoid the right under the position where the welding electrodes for spot welding contact electrode Since it has a pattern shape, heat from the welding electrode is not directly applied to the connection electrode, so that the solder on the connection electrode is not scattered.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a battery pack according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic plan view of an embodiment of a battery pack according to the present invention. In addition, the same code | symbol is attached | subjected to the component which has the same function as the conventional battery pack, and the description is abbreviate | omitted.
[0011]
The electrode tabs 3a and 3b extending from the end of the terrace portion 2 of the battery body 1 are connected in advance to the L-shaped intermediate tabs 4a and 4b, respectively, by spot welding. These intermediate tabs 4a and 4b are made of the same material as the electrode tabs 3a and 3b. In a nickel metal hydride (Ni-MH) battery, the positive-side tab is made of nickel and the negative-side tab is made of aluminum. Is done.
[0012]
The connection between the intermediate tab 4a and the connection electrode 18 of the protection circuit board 5 will be described.
FIG. 2 is a diagram showing a schematic configuration of the intermediate tab 4a and the connection electrode 18 of the protection circuit board 5. FIG. 2A shows the intermediate tab 4a on the intermediate member 9c for welding previously connected to the connection electrode 18. The contact state is shown. The connection electrode 18 is provided on the surface of the protection circuit board 5 and includes four lands 18a to 18d obtained by dividing a substantially rectangular shape by a central axis in two directions. In FIG. 2A, reference numeral 18e denotes a printed wiring that connects the connection electrode 18 to a circuit portion (not shown) of the protection circuit board 5.
[0013]
FIG.2 (b) shows the XX cross section of Fig.2 (a). In spot welding of the intermediate tab 4a to the connection electrode 18, the tips of the spot welding electrodes 9a and 9b are brought into contact with the intermediate tab 4a superimposed on the lands 18a to 18d via the intermediate member (Ni plate) 9c. Done. As shown in FIGS. 2A to 2C, the pair of spot welding electrodes 9a and 9b are located above the gap 18f between the land 18a and the land 18c, and the spot welding electrode 9b is formed on the land 18b. And 18d is disposed so as to be located above the gap 18g. In other words, the lands 18a to 18d of the connection electrode 18 are provided so as to avoid a position directly below the portion where the spot welding electrodes 9a and 9b abut. The intermediate member 9c is made of the same material as that of the intermediate tab 4a to be welded, and here is formed of a nickel plate. The thickness is, for example, 0.15 mm.
[0014]
When the spot welding electrodes 9a and 9b are driven in this state and the intermediate tab 4a is spot-welded to the intermediate member 9c, the welding current does not flow directly above the lands 18a to 18d, so that the welding heat does not flow on the lands 18a to 18d. It is hard to be transmitted to. As a result, there is no problem that the solder connecting the intermediate member 9c on the lands 18a to 18d is melted and scattered. The same applies to spot welding of the intermediate tab 4b to the protective circuit board 5. However, in this case, aluminum is used as the intermediate member 9c.
[0015]
If the thickness of the intermediate members 9a and 9b is increased from 0.15 mm to 0.3 mm, the heat capacity of the intermediate members 9a and 9b increases, so that the heating of the solder is further prevented and the scattering of the solder is further reduced. This has been confirmed by the inventors' experiments.
1A to 10E are land portions for soldering lead wires 11a to 11e for connecting the battery pack to an external load (not shown), and 12 is a lead portion for connecting the lead wires 11a to 11e to the external load. These are connectors to be connected, both of which are connected to the protection circuit board 5 prior to the connection between the protection circuit board 5 and the intermediate tabs 4a and 4b (electrode tabs).
[0016]
When the protective circuit board 5 is connected to the intermediate tabs 4a and 4b as described above, solder balls are not generated due to the scattering of the solder. The next battery pack assembling operation can be performed without performing the operation of removing the solder balls.
That is, the intermediate tabs 4a and 4b connected to the protective circuit board 5 are spot-welded to the electrode tabs 3a and 3b, respectively, without performing the inspection / removal operation of the solder balls, so that the protective circuit board 5 is attached to the battery body 1. You can move on to connecting. At this time, as shown in FIG. 1A, by aligning the L-shaped bottom sides of the intermediate tabs 4a and 4b with respect to the electrode tabs 3a and 3b, a protection circuit board is provided for the battery body 1. 5 mounting positions can be set.
[0017]
And after the said connection is performed, the insulating board 6b is attached to the upper surface of the terrace part 2. FIG. Further, since the protection circuit board 5 is disposed above the terrace portion 2 as shown in FIG. 3C, the intermediate tabs 4a and 4b and the electrode tabs 3a and 3b are arranged as shown in FIG. Are bent in the directions of arrows A and B, respectively. At this time, the bending of the intermediate tabs 4a and 4b is defined using the spacer 6a.
[0018]
FIG. 1B shows a state in which the intermediate tabs 4a and 4b and the electrode tabs 3a and 3b are bent and the protective circuit board 5 is positioned above the terrace portion 2, and further, A planar configuration of the battery pack 1 in a state where the intermediate tabs 4a and 4b and the electrode tabs 3a and 3b are covered with insulating paper 7 is shown.
Note that the present invention is not limited to the above-described embodiment, and can be appropriately modified and implemented without departing from the spirit of the present invention.
[0019]
【The invention's effect】
According to the battery pack of the present invention as described above, an intermediate tab which is connected to the electrode tab drawn from the battery main body, when the spot welding to an intermediate member which is previously connected to the connection electrode of the protection circuit board Since the land of the connection electrode has a pattern shape in which the land is provided at a position avoiding the portion where the spot welding electrode contacts, the solder connecting the intermediate member to the connection electrode is scattered by the welding heat. There is no. Accordingly, it is possible to provide a battery pack that does not cause problems due to solder scattering. In addition, it is possible to obtain a practically important effect that the manufacturing cost of the battery pack can be reduced.
[Brief description of the drawings]
FIG. 1 is a schematic plan view of an embodiment of a battery pack according to the present invention.
FIG. 2 is a diagram schematically showing a state in which an intermediate tab is spot welded to a connection electrode of a printed board included in a battery pack according to the present invention using a spot welding electrode.
FIG. 3 is a diagram showing a schematic configuration of connection of a battery pack, an electrode tab, an intermediate tab, and a printed board.
FIG. 4 is a diagram for explaining a problem when an intermediate tab is spot welded to a connection electrode of a printed board included in a conventional battery pack using a spot welding electrode.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Battery main body 2 Terrace part 3a, 3b Electrode tab 4a, 4b Intermediate tab 9c Intermediate member 5 Protection circuit board 18 Connection electrode 18a-18d Land part

Claims (2)

電池セルを収納した電池本体と、上記電池セルに対する保護回路を搭載した保護回路基板とを具備した電池パックであって、
前記保護回路基板に設けられた接続電極と、
前記電池本体から引出された前記電池セルの電極タブと、
前記接続電極および前記電極タブとを溶接してなる中間タブからなり、
前記接続電極は前記中間タブを介してスポット溶接用の溶接電極が当接する部位を除く領域に形成したランドからなる電極パターンを形成したことを特徴とする電池パック。A battery pack comprising a battery body housing battery cells and a protection circuit board on which a protection circuit for the battery cells is mounted,
A connection electrode provided on the protection circuit board ;
An electrode tab of the battery cell drawn from the battery body ;
An intermediate tab formed by welding the connection electrode and the electrode tab,
The connection electrode is a battery pack, characterized in that the formation of the electrode pattern consisting of lands welding electrode for spot welding through the intermediate tab is formed in a region excluding a portion abutting. 前記中間タブは、該中間タブと同種の中間部材を介して前記ランドにスポット溶接されるものである請求項１に記載の電池パック。The intermediate tabs, battery pack according to claim 1 is intended to be spot welded to the land through an intermediate member of the intermediate tab and the like.
JP2001367299A 2001-11-30 2001-11-30 Battery pack Expired - Fee Related JP4061056B2 (en)

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JP3776907B2 (en) * 2003-11-21 2006-05-24 ローム株式会社 Circuit board
US7920045B2 (en) * 2004-03-15 2011-04-05 Tyco Electronics Corporation Surface mountable PPTC device with integral weld plate
JP2005322568A (en) * 2004-05-11 2005-11-17 Nec Tokin Corp Connection method of terminal and circuit board
JP2006147249A (en) * 2004-11-17 2006-06-08 Toyota Motor Corp Energy storage device and its manufacturing
JP5011678B2 (en) * 2005-08-12 2012-08-29 ソニー株式会社 Secondary battery
KR101057566B1 (en) 2009-06-15 2011-08-17 삼성에스디아이 주식회사 Secondary battery with a protection circuit module and method of making the secondary battery with a protection circuit module
CN104064715B (en) * 2014-01-26 2016-06-08 宁波惠康新能源科技有限公司 A kind of export structure of lithium battery group
JP6511271B2 (en) * 2014-03-10 2019-05-15 セイコーインスツル株式会社 Substrate unit and electrochemical cell unit

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