JP2019169427A - Battery module - Google Patents

Battery module Download PDF

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JP2019169427A
JP2019169427A JP2018058123A JP2018058123A JP2019169427A JP 2019169427 A JP2019169427 A JP 2019169427A JP 2018058123 A JP2018058123 A JP 2018058123A JP 2018058123 A JP2018058123 A JP 2018058123A JP 2019169427 A JP2019169427 A JP 2019169427A
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battery module
module according
battery
negative electrode
positive electrode
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三紀夫 鶴岡
Mikio Tsuruoka
三紀夫 鶴岡
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TDK 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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  • Electric Double-Layer Capacitors Or The Like (AREA)
  • Battery Mounting, Suspending (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

To provide a battery module that offers excellent workability and easy battery voltage detection.SOLUTION: A battery module 100 includes a plurality of laminated batteries 1 to 8 and bus bars 11 to 17 for connecting the battery electrodes. The plurality of laminated batteries 1 to 8 have a zigzag configuration in which a positive electrode tabs 31 and a negative electrode tabs 32 are alternately arranged in the stacking direction Z, and an insulating device 10 for preventing a short circuit is disposed at a place where there is a potential difference between the electrodes. Furthermore, a voltage detection terminal 21 is mounted on the insulating device 10.SELECTED DRAWING: Figure 3

Description

本発明は、平板状ラネート電池を積層した電池モジュールに関するものである。   The present invention relates to a battery module in which flat lanate batteries are stacked.

ラミネート形電池は、薄板状の正極端子および負極端子が一方向に延伸した形状が一般的であり、ラミネート形電池を積層することによって、積層体を用いた電池パックの高容量化または高電圧化またはその両方を実現できる。これらの平板状の単電池を積層した後に、溶接等の手段によって端子同士を直列に接続する際には、端子の積層方向に複数枚の端子が連なっていると、接続しようとする２つの端子以外の端子が接続しようとする２つの端子の接続の邪魔になり、接続の作業が困難になる。   Laminate batteries generally have a thin plate-like positive electrode terminal and negative electrode terminal that are stretched in one direction. By laminating laminate batteries, the battery pack using the laminate has a higher capacity or higher voltage. Or both can be realized. After laminating these flat unit cells, when connecting the terminals in series by means such as welding, if a plurality of terminals are connected in the terminal laminating direction, the two terminals to be connected Other terminals are obstructing the connection of the two terminals to be connected, and the connection work becomes difficult.

この問題に対して、接続しようとする端子以外の端子が邪魔にならないように、接続しようとする端子以外の端子を折り曲げることも想定されるが、他の端子に接触し、短絡する可能性が高くなる。一方、上記の問題を解決する方法として、平板状の単電池を積層しながら端子を接続していく方法が挙げられる。しかし、この方法においても、短絡しないように端子を接続しようとすると、積層した平板状の単電池の末端の単電池の端子が接続の邪魔になる。作業性を考慮すると、一気に接続の作業を進めることが好ましいので、平板状の単電池を積層した後に端子同士を接続する方が優れている。従って、より作業性に優れ、短絡の可能性の低い組電池が求められている。   For this problem, it is assumed that the terminals other than the terminal to be connected do not get in the way, but the terminals other than the terminal to be connected may be bent. Get higher. On the other hand, as a method of solving the above problem, there is a method of connecting terminals while laminating flat unit cells. However, even in this method, if the terminals are to be connected so as not to be short-circuited, the terminal of the unit cell at the end of the stacked flat unit cell interferes with the connection. Considering workability, it is preferable to proceed with the connection work at a stretch. Therefore, it is better to connect the terminals after laminating flat unit cells. Therefore, there is a demand for an assembled battery that is more workable and has a low possibility of short circuit.

特許文献１においては、各ラミネート形電池は、はみ出し部分が向き合うように配置されたＬ字形の正極タブおよび負極タブを有し、正極タブの折り曲げ部分がラミネート形電池の平面方向における内側で一方側の隣のラミネート形電池の負極タブの折り曲げ部分に接続され、負極タブの折り曲げ部分がラミネート形電池の平面方向における内側で他方側の隣のラミネート形電池の正極タブの折り曲げ部分に接続されることによって、複数のラミネート形電池が直列に接続される。   In Patent Document 1, each laminated battery has an L-shaped positive electrode tab and a negative electrode tab arranged so that the protruding parts face each other, and the bent part of the positive electrode tab is on one side inside the planar direction of the laminated battery. Is connected to the bent part of the negative electrode tab of the laminated battery next to the battery, and the bent part of the negative electrode tab is connected to the bent part of the positive electrode tab of the adjacent laminated battery on the other side inside in the plane direction of the laminated battery. A plurality of laminated batteries are connected in series.

特開２００５−１９０８８５号公報JP 2005-190885 A

しかしながら、特許文献１に開示されたラミネート形電池は、Ｌ字形の正極タブおよび負極タブを有するので、ラミネート形電池を搬送するときに正極タブおよび負極タブのはみ出し部分が引っ掛かり、正極タブおよび負極タブを破損する可能性がある。また、正極タブの折り曲げ部分は、ラミネート形電池の平面方向における内側で負極タブの折り曲げ部分と接続されるので、接続しようとする正極タブおよび負極タブ以外の正極タブおよび負極タブが邪魔になり作業性が悪くなる可能性がある。 However, since the laminated battery disclosed in Patent Document 1 has an L-shaped positive electrode tab and a negative electrode tab, the protruding portions of the positive electrode tab and the negative electrode tab are caught when the laminated battery is conveyed, and the positive electrode tab and the negative electrode tab are caught. May damage. In addition, the bent part of the positive electrode tab is connected to the bent part of the negative electrode tab inside the plane of the laminated battery, so the positive electrode tab and the negative electrode tab other than the positive electrode tab and the negative electrode tab to be connected are obstructive. May be worse.

本発明は、かかる問題を解決するためになされたものであり、その目的は、作業性に優れる電池モジュールを提供することである。   The present invention has been made to solve such a problem, and an object thereof is to provide a battery module having excellent workability.

本発明に係る電池モジュールは、ラミネートフィルムで形成された外装体内に収容された充放電可能な蓄電素子、及び前記蓄電素子に接続されると共にその一部が前記外装体の外部に突出した正極端子と負極端子を有する複数の蓄電セルと、前記蓄電セル同士を電気的に直列接続するバスバーを備え、前記蓄電セルを前記正極端子と前記負極端子が交互になるように隣接して平面配置したときに、前記バスバーの長さＬｂと、隣り合う前記蓄電セル間の正極端子と負極端子間の距離Ｌｔの関係が、Ｌｂ≧Ｌｔであることを特徴とする。   The battery module according to the present invention includes a chargeable / dischargeable power storage element housed in an exterior body formed of a laminate film, and a positive electrode terminal that is connected to the power storage element and partially protrudes outside the exterior body And a plurality of energy storage cells having a negative electrode terminal, and a bus bar that electrically connects the energy storage cells in series, and when the energy storage cells are arranged in a plane adjacent to each other so that the positive electrode terminal and the negative electrode terminal are alternated In addition, the relationship between the length Lb of the bus bar and the distance Lt between the positive electrode terminal and the negative electrode terminal between the adjacent storage cells is Lb ≧ Lt.

本発明に係る電池モジュールは、前記蓄電セルをつづら折りして配置したことを特徴とする。 The battery module according to the present invention is characterized in that the power storage cells are folded and arranged.

本発明に係る電池モジュールは、前記バスバーを折り曲げて前記蓄電セル間内に配置したことを特徴とする。 The battery module according to the present invention is characterized in that the bus bar is bent and disposed between the storage cells.

本発明に係る電池モジュールは、前記バスバー同士の接触を防ぐ絶縁部を有することを特徴とする。 The battery module according to the present invention includes an insulating portion that prevents contact between the bus bars.

本発明に係る電池モジュールは、筐体をさらに有し、前記筐体が前記絶縁部であることを特徴とする。 The battery module according to the present invention further includes a housing, and the housing is the insulating portion.

本発明に係る電池モジュールは、前記バスバー、前記正極端子、前記負極端子、のうち少なくとも１つ以上に電圧検出端子が接続されていることを特徴とする。 The battery module according to the present invention is characterized in that a voltage detection terminal is connected to at least one of the bus bar, the positive terminal, and the negative terminal.

本発明に係る電池モジュールは、前記バスバーは前記電圧検出端子に挟持されていることを特徴とする。 The battery module according to the present invention is characterized in that the bus bar is sandwiched between the voltage detection terminals.

本発明によれば、ラミネート型電池を積層する前に電池間の電極を接続するので、接続作業が容易に行うことができる。   According to the present invention, since the electrodes between the batteries are connected before laminating the stacked batteries, the connection work can be easily performed.

また電極間に絶縁器具を配置することで電極間のショート防止も容易に行うことができる。     Further, by arranging an insulating device between the electrodes, it is possible to easily prevent a short circuit between the electrodes.

さらに絶縁器具に電圧検出端子を配置しているので容易に電圧検出を行うことができる。
Furthermore, since the voltage detection terminal is arrange | positioned at the insulation instrument, voltage detection can be performed easily.

図１は、本発明の実施形態による電池モジュールの立体概略図である。FIG. 1 is a three-dimensional schematic diagram of a battery module according to an embodiment of the present invention. 図２は、図１の一部を詳細に示した拡大図である。FIG. 2 is an enlarged view showing a part of FIG. 1 in detail. 図３は、図１をX方向から見た電池モジュールの概略図である。FIG. 3 is a schematic view of the battery module when FIG. 1 is viewed from the X direction. 図４は、本発明の変化例１を示す図であって、電圧検出端子の代替として電圧検出ケーブルを用いた場合の電池モジュールの概略図である。FIG. 4 is a diagram illustrating a first modification of the present invention, and is a schematic diagram of a battery module when a voltage detection cable is used as an alternative to the voltage detection terminal. 図５は、本発明の変化例４を示す図であって、バスバーを折り曲げしていない電池モジュールの概略図である。FIG. 5 is a diagram showing a fourth modification of the present invention, and is a schematic diagram of a battery module in which the bus bar is not bent. 図６は、積層前の電池接続図である。FIG. 6 is a battery connection diagram before lamination.

（実施形態）
以下、本発明の実施形態を、添付した図面を適宜参照しながら詳細に説明する。以下の説明で用いる図面は、本発明の特徴をわかりやすくするために便宜上特徴となる部分を拡大して示している場合があり、各構成要素の寸法比率などは実際とは異なっていることがある。
また、本実施形態では、説明の便宜上、最小単位となる電池を「ラミネート電池」と呼ぶ。なお、「ラミネート電池」の代わりに、「電池セル」または「単電池」、あるいは「セル」などと呼ばれてもよい。
同様に、本実施形態では、複数の電池セルを直列（直列と並列の組み合わせでもよい。）で有するまとまりを「電池モジュール」と呼ぶ。なお、「電池モジュール」の代わりに、「電池パック」または「組電池」、あるいは単に「電池」（複数の電池セルのまとまりの電池）と呼ばれてもよい。
ここで、これらの呼び方は説明の便宜上のものであり、呼び方が異なっても実質的に同じものは含まれ得る。 (Embodiment)
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings as appropriate. In the drawings used in the following description, in order to make the characteristics of the present invention easier to understand, there are cases where the characteristic parts are enlarged for the sake of convenience, and the dimensional ratios of the respective components are different from actual ones. is there.
In the present embodiment, for convenience of explanation, a battery that is a minimum unit is referred to as a “laminate battery”. Instead of “laminate battery”, it may be called “battery cell”, “single cell”, “cell” or the like.
Similarly, in this embodiment, a group having a plurality of battery cells in series (may be a combination of series and parallel) is referred to as a “battery module”. Instead of the “battery module”, it may be referred to as “battery pack” or “assembled battery” or simply “battery” (battery of a plurality of battery cells).
Here, these designations are for convenience of explanation, and substantially the same may be included even if the designations are different.

図１は、この発明の実施の形態による電池モジュールの立体概略図である。図２は図１の一部を詳細に示した拡大図である。また図３は図１をX方向から見た概略図を示している。図１〜３を用いて説明する。この発明の実施の形態による電池モジュール１００は、ラミネート形電池１〜８と、電池の電極間を接続するバスバー１１〜１７を備える。バスバー１１〜１７はラミネート型電池１〜８の外形サイズから飛び出さないように折り畳んだ構造となっている。複数のラミネート形電池１〜６は、積層方向Ｚにおいて正極タブ３１および負極タブ３２が交互に配置されるようにつづら折りされた形態を有しており、電極間電位差のある個所はショート防止用の絶縁器具１０を配置している。さらに、絶縁器具１０には電圧検出端子２１が実装されている。 FIG. 1 is a three-dimensional schematic diagram of a battery module according to an embodiment of the present invention. FIG. 2 is an enlarged view showing a part of FIG. 1 in detail. FIG. 3 is a schematic view of FIG. 1 viewed from the X direction. It demonstrates using FIGS. 1-3. The battery module 100 according to the embodiment of the present invention includes laminated batteries 1 to 8 and bus bars 11 to 17 for connecting the battery electrodes. The bus bars 11 to 17 are folded so as not to jump out of the outer size of the laminated batteries 1 to 8. The plurality of laminated batteries 1 to 6 have a configuration in which the positive electrode tabs 31 and the negative electrode tabs 32 are alternately arranged in the stacking direction Z, and a portion where there is a potential difference between the electrodes is for preventing a short circuit. An insulating device 10 is disposed. Furthermore, a voltage detection terminal 21 is mounted on the insulating instrument 10.

図４はラミネート形電池１〜８をバスバー１１〜１７で接続する際の構造である。ラミネート形電池１〜８を同一平面上に配置しバスバー１１〜１７で正極タブ３１および負極タブ３２を接続する。 FIG. 4 shows a structure when the laminated batteries 1 to 8 are connected by the bus bars 11 to 17. Laminated batteries 1 to 8 are arranged on the same plane, and the positive electrode tab 31 and the negative electrode tab 32 are connected by bus bars 11 to 17.

（電池モジュールの作用）
上述のように構成されたラネート型電池を複数積層した電池モジュールにおいてモジュール外形を最小にすることができる。また電池間のショート防止を確実に行うことができる。さらに電圧検出も容易に行うことができる。 (Operation of battery module)
The module outer shape can be minimized in the battery module in which a plurality of lanate batteries configured as described above are stacked. In addition, it is possible to reliably prevent a short circuit between the batteries. Furthermore, voltage detection can be easily performed.

なお、本実施形態では８つのリチウムイオン二次電池２を具備する場合を例に挙げて説明するが、この場合に限定されるものではなく、リチウムイオン二次電池１〜８の数は適宜変更して構わない。例えば、２つのリチウムイオン二次電池１、２を具備する電池モジュール１００としても構わない。   In this embodiment, the case where eight lithium ion secondary batteries 2 are provided will be described as an example. However, the present embodiment is not limited to this case, and the number of lithium ion secondary batteries 1 to 8 is appropriately changed. It doesn't matter. For example, a battery module 100 including two lithium ion secondary batteries 1 and 2 may be used.

（第２実施形態）
次に、本発明の第２実施形態について図面を参照して説明する。
なお、第２実施形態においては、実施形態における構成要素と同一の部分については、同一の符号を付しその説明を省略する。 (Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to the drawings.
Note that in the second embodiment, the same components as those in the embodiments are denoted by the same reference numerals and description thereof is omitted.

図３に示すように、第２実施形態の電池モジュール１００は、実施形態中の電圧検出端子２１の代替として電圧検出ケーブル２２を用いた場合の例である。電圧検出ケーブル２２は、例えば溶接（スポット溶接）やはんだ付けをすることでバスバー１１〜１７に接続する。 As shown in FIG. 3, the battery module 100 of 2nd Embodiment is an example at the time of using the voltage detection cable 22 as an alternative of the voltage detection terminal 21 in embodiment. The voltage detection cable 22 is connected to the bus bars 11 to 17 by, for example, welding (spot welding) or soldering.

（電池モジュールの作用）
上述のように構成された第２実施形態の電池モジュール１００によれば、実施形態と同様の作用効果を奏効することができる。
それに加え、電圧検出端子２１の代替として電圧検出ケーブル２２を用いることで、作業性を更に向上させることができる。 (Operation of battery module)
According to the battery module 100 of 2nd Embodiment comprised as mentioned above, the effect similar to embodiment can be show | played.
In addition, workability can be further improved by using the voltage detection cable 22 as an alternative to the voltage detection terminal 21.

（第３実施形態）
次に、本発明の第３実施形態について図面を参照して説明する。
なお、第３実施形態においては、実施形態における構成要素と同一の部分については、同一の符号を付しその説明を省略する。 (Third embodiment)
Next, a third embodiment of the present invention will be described with reference to the drawings.
Note that in the third embodiment, the same components as those in the embodiments are denoted by the same reference numerals and description thereof is omitted.

図５に示すように、第３実施形態の電池モジュール１００は、実施形態中のバスバー１１〜１７が図１の様に折り畳む構造ではなくラミネート形電池１〜８をつづら折りするために生じた湾曲した構造であり、更に、第２実施形態と同じく電圧検出ケーブル２２がバスバー１１〜１７に接続されている。 As shown in FIG. 5, the battery module 100 according to the third embodiment is curved because the bus bars 11 to 17 in the embodiment are not folded as shown in FIG. Further, the voltage detection cable 22 is connected to the bus bars 11 to 17 as in the second embodiment.

（電池モジュールの作用）
上述のように構成された第３実施形態の電池モジュール１００によれば、実施形態と同様の作用効果を奏効することができる。
それに加え、バスバー１１〜１７を湾曲した構造にすることで、作業性を更に向上させることができる。 (Operation of battery module)
According to the battery module 100 of 3rd Embodiment comprised as mentioned above, the effect similar to embodiment can be show | played.
In addition, by making the bus bars 11 to 17 curved, workability can be further improved.

以上、本発明の実施形態を挙げて説明したが、これらの実施形態は一例として提示したものであり、発明の範囲を限定することは意図していない。各実施形態は、その他様々な形態で実施されることが可能であり、発明の要旨を逸脱しない範囲で、種々の省略、置き換え、変更を行うことが可能である。また、各実施形態には、例えば当業者が容易に想定できるもの、実質的に同一のもの、均等の範囲のものなどが含まれる。   The embodiments of the present invention have been described above, but these embodiments are presented as examples, and are not intended to limit the scope of the invention. Each embodiment can be carried out in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. Each embodiment includes, for example, those that can be easily assumed by those skilled in the art, those that are substantially the same, those in an equivalent range, and the like.

上記各実施形態では、蓄電セルの一例としてラミネート型電池１〜８を例に挙げて説明したが、この場合に限定されるものではない。例えばアニオンとカチオンとがそれぞれ電解質を通じて正極タブ３１側と負極タブ３２側とに移動し、充電時には電気二重層を形成しながら吸着し、放電時には電気二重層を消失させながら脱離することで、電荷の蓄積と放出とを行って充放電を行う、電気二重層キャパシタ（例えばリチウムイオンキャパシタ）であっても構わない。
電気二重層キャパシタの場合には、例えば酸化還元を伴う反応なしにイオンの物理吸着だけで電荷を貯蔵することができ、安定した充放電を行うことが可能である。 In each of the above embodiments, the laminate type batteries 1 to 8 have been described as an example of the storage cell, but the present invention is not limited to this case. For example, an anion and a cation move to the positive electrode tab 31 side and the negative electrode tab 32 side through the electrolyte, respectively, adsorb while forming an electric double layer during charging, and desorb while losing the electric double layer during discharging. An electric double layer capacitor (for example, a lithium ion capacitor) that charges and discharges by accumulating and discharging electric charges may be used.
In the case of an electric double layer capacitor, for example, charges can be stored only by physical adsorption of ions without a reaction involving oxidation and reduction, and stable charge and discharge can be performed.

１００…電池モジュール、１〜８…ラミネート型電池、１１〜１７…バスバー、１０…絶縁器具、２１…電圧検出端子、２２…電圧検出ケーブル、３１…正極タブ、３２…負極タブ、
DESCRIPTION OF SYMBOLS 100 ... Battery module, 1-8 ... Laminate type battery, 11-17 ... Bus bar, 10 ... Insulation instrument, 21 ... Voltage detection terminal, 22 ... Voltage detection cable, 31 ... Positive electrode tab, 32 ... Negative electrode tab,

Claims (7)

ラミネートフィルムで形成された外装体内に収容された充放電可能な蓄電素子、
及び前記蓄電素子に接続されると共にその一部が前記外装体の外部に突出した正極端子と負極端子を有する複数の蓄電セルと、前記蓄電セル同士を電気的に直列接続するバスバーを備え、前記蓄電セルを前記正極端子と前記負極端子が交互になるように隣接して平面配置したときに、前記バスバーの長さＬｂと、隣り合う前記蓄電セル間の正極端子と負極端子間の距離Ｌｔの関係が、Ｌｂ≧Ｌｔであることを特徴とする電池モジュール。 A chargeable / dischargeable power storage element housed in an exterior body formed of a laminate film,
And a plurality of storage cells having a positive electrode terminal and a negative electrode terminal that are connected to the storage element and a part of which protrudes outside the exterior body, and a bus bar that electrically connects the storage cells in series, When the storage cells are arranged in a plane adjacent to each other so that the positive electrode terminals and the negative electrode terminals alternate, the length Lb of the bus bar and the distance Lt between the positive electrode terminals and the negative electrode terminals between the adjacent storage cells A battery module, wherein the relationship is Lb ≧ Lt. 前記蓄電セルをつづら折りして配置したことを特徴とする請求項１に記載の電池モジュール。   The battery module according to claim 1, wherein the storage cell is arranged by being folded. 前記バスバーを折り曲げて前記蓄電セル間内に配置したことを特徴とする請求項２に記載の電池モジュール。   The battery module according to claim 2, wherein the bus bar is bent and disposed between the storage cells. 前記バスバー同士の接触を防ぐ絶縁部を有することを特徴とする請求項１または２に記載の電池モジュール。   The battery module according to claim 1, further comprising an insulating portion that prevents contact between the bus bars. 請求項１〜４の電池モジュールは筐体をさらに有し、
前記筐体が前記絶縁部であることを特徴とする請求項１〜４のいずれかに記載の電池モジュール。 The battery module according to claims 1 to 4 further includes a housing,
The battery module according to claim 1, wherein the casing is the insulating portion. 前記バスバー、前記正極端子、前記負極端子、のうち少なくとも１つ以上に電圧検出端子が接続されていることを特徴とする請求項１〜５いずれかに記載の電池モジュール。   The battery module according to claim 1, wherein a voltage detection terminal is connected to at least one of the bus bar, the positive electrode terminal, and the negative electrode terminal. 前記バスバーは前記電圧検出端子に挟持されていることを特徴とする請求項６に記載の電池モジュール。
The battery module according to claim 6, wherein the bus bar is sandwiched between the voltage detection terminals.
JP2018058123A 2018-03-26 2018-03-26 Battery module Pending JP2019169427A (en)

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