JP5392951B2 - Secondary battery - Google Patents
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- JP5392951B2 JP5392951B2 JP2009145525A JP2009145525A JP5392951B2 JP 5392951 B2 JP5392951 B2 JP 5392951B2 JP 2009145525 A JP2009145525 A JP 2009145525A JP 2009145525 A JP2009145525 A JP 2009145525A JP 5392951 B2 JP5392951 B2 JP 5392951B2
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- 230000001070 adhesive effect Effects 0.000 claims description 7
- 229920001971 elastomer Polymers 0.000 claims description 4
- 239000005060 rubber Substances 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 13
- 229910052782 aluminium Inorganic materials 0.000 description 12
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 11
- 229910052799 carbon Inorganic materials 0.000 description 11
- 239000000853 adhesive Substances 0.000 description 8
- 229910001416 lithium ion Inorganic materials 0.000 description 6
- 238000001816 cooling Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 239000005001 laminate film Substances 0.000 description 4
- 229920002379 silicone rubber Polymers 0.000 description 4
- 239000004945 silicone rubber Substances 0.000 description 4
- 239000013078 crystal Substances 0.000 description 3
- -1 polyethylene Polymers 0.000 description 3
- 238000010248 power generation Methods 0.000 description 3
- 229920000459 Nitrile rubber Polymers 0.000 description 2
- 229920005549 butyl rubber Polymers 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 229920002943 EPDM rubber Polymers 0.000 description 1
- 229920000181 Ethylene propylene rubber Polymers 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000004308 accommodation Effects 0.000 description 1
- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- XUCNUKMRBVNAPB-UHFFFAOYSA-N fluoroethene Chemical group FC=C XUCNUKMRBVNAPB-UHFFFAOYSA-N 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- UGKDIUIOSMUOAW-UHFFFAOYSA-N iron nickel Chemical compound [Fe].[Ni] UGKDIUIOSMUOAW-UHFFFAOYSA-N 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910000652 nickel hydride Inorganic materials 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 229920006122 polyamide resin Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920006254 polymer film Polymers 0.000 description 1
- 229920005672 polyolefin resin Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
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Classifications
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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
Description
本発明は、熱伝導率の高いシートを備えた二次電池に関する。 The present invention relates to a secondary battery including a sheet having high thermal conductivity.
周知の如く、コードレス機器や携帯機器に、ニッケルカドミウム蓄電池やニッケル水素蓄電池及びリチウムイオン電池などの二次電池が使用されている。このような用途では、小型・軽量化・高容量化が進む一方、最近、自動車や鉄道、搬送車などの用途では、二次電池の大容量・大型化が進んでいる。 As is well known, secondary batteries such as nickel cadmium storage batteries, nickel hydride storage batteries, and lithium ion batteries are used in cordless devices and portable devices. In such applications, while miniaturization, weight reduction, and increase in capacity have progressed, recently, in applications such as automobiles, railways, and transportation vehicles, secondary batteries have increased in capacity and size.
更に、近年は、前記二次電池を急速充電や高率放電にて使用される用途が増大している。ところで、二次電池を急速充電や高率放電にて使用すると、極板中を電流が均一に流れず、集電部付近に電流が集中し、その近辺が高温になり、単電池内での温度ばらつきが大きくなる。そのため、集電部付近の極板劣化が部分的に加速し、早期に寿命に至ってしまう。大容量・大型の電池では、電流が大きいため、更に電流集中が起き、単電池内の温度ばらつきが増大する。 Further, in recent years, the use of the secondary battery by rapid charging or high rate discharge has increased. By the way, when a secondary battery is used for rapid charging or high rate discharge, the current does not flow uniformly in the electrode plate, the current concentrates near the current collector, the temperature becomes high in the vicinity of the current collector, Temperature variation increases. For this reason, the electrode plate deterioration near the current collecting part is partially accelerated, resulting in an early life. A large-capacity / large-sized battery has a large current, so that current concentration further occurs and temperature variation in the unit cell increases.
また、多様な負荷電圧や負荷容量に対し共通化された二次電池で対応するために、二次電池を直列接続や並列接続、またはそれらを組み合わせた接続をし、組電池を構成することが多い。組電池構成方法としては、複数の電池をテープで固定したり、熱収縮チューブで固定したり、ハードケースに収納する方法が一般的である。しかし、ただ単にテープで固定したり、熱収縮チューブで固定したり、ハードケースに収納するだけでは、電池自体の発熱による熱が放出し難い。特に、単電池の端子を同方向に向けて組電池にした場合、単電池内の温度バラツキが増長され、早期に寿命に至ってしまう。 In addition, in order to cope with a variety of load voltages and load capacities with a common secondary battery, the secondary battery can be connected in series, parallel, or a combination thereof to form an assembled battery. Many. As a battery assembly method, a plurality of batteries are generally fixed with a tape, fixed with a heat shrinkable tube, or stored in a hard case. However, simply fixing with tape, fixing with a heat-shrinkable tube, or storing in a hard case makes it difficult to release heat due to the heat generated by the battery itself. In particular, when an assembled battery is formed with the terminals of the unit cells directed in the same direction, the temperature variation in the unit cell is increased and the service life is reached early.
このような課題を解決するため、特許文献１や特許文献２が提案されている。特許文献１では、単電池間に隙間を開け、そこに冷却風を流して冷却する空冷方式が開示されている。特許文献２には、単電池間に冷却液を循環させる水冷方式が開示されている。
In order to solve such problems,
しかしながら、上記方式では、単電池間に冷却風や冷却液を循環させるための隙間が必要になり、その分組電池の大きさが大きくなってしまう。また、これらの方式の組電池を、自動車や航空機などの常に大きな衝撃が加わる移動体に使用した場合、単電池間に隙間を設けているために、耐振設計が複雑になり、十分な耐振構造を得ることが難しい。 However, the above method requires a gap for circulating the cooling air or the cooling liquid between the single cells, and the size of the assembled battery is increased accordingly. In addition, when these types of assembled batteries are used for mobile objects that are subject to constant impact, such as automobiles and airplanes, there is a gap between the cells, which complicates the vibration resistance design and provides sufficient vibration resistance structure. Difficult to get.
また、外装材としてアルミニウムなどの金属箔と高分子フィルムからなるラミネートフィルムに発電素子を封入してなるラミネート形電池は、ラミネートフィルムで密封した簡単な構造である。そのため、機械的強度が非常に弱く、ただ単にテープで固定したり、熱収縮チューブで固定したりするだけでは、振動などによりリードタブの破断やラミネートフィルムの破れなどが発生してしまうことがある。 In addition, a laminated battery in which a power generation element is enclosed in a laminate film made of a metal foil such as aluminum and a polymer film as an exterior material has a simple structure sealed with a laminate film. For this reason, the mechanical strength is very weak, and simply fixing with a tape or a heat-shrinkable tube may cause breakage of the lead tab or tearing of the laminate film due to vibration or the like.
本発明はこうした事情を考慮してなされたもので、従来と比べて寿命性能を改善しうる二次電池を提供することを目的とする。 The present invention has been made in view of such circumstances, and an object of the present invention is to provide a secondary battery capable of improving the life performance as compared with the prior art.
本発明に係る二次電池は、ラミネート形の電池を１個以上配置して構成された二次電池本体と、前記二次電池本体を収納するハードケースと、前記二次電池本体と前記ハードケースの接する面に配置された、両面粘着性を有する熱伝導性ゴム弾性体シートと、前記ハードケースの１面以上に取り付けられた、厚み方向に比べて幅方向の熱伝導率が高いシートとを有することを特徴とする。 The secondary battery according to the present invention includes a secondary battery main body configured by arranging one or more laminated batteries, a hard case that houses the secondary battery main body, the secondary battery main body, and the hard case. the disposed contact surface, and the heat-conducting rubber elastic sheet having a double-sided adhesive, said attached over one surface of the hard case, a sheet is high width direction of the heat conductivity than the thickness direction It is characterized by having .
本発明によれば、従来と比べて寿命性能を改善できる二次電池が得られる。 According to the present invention, it is possible to obtain a secondary battery that can improve the life performance as compared with the prior art.
本発明に係る二次電池について以下に詳細に説明する。
本発明において、厚み方向に比べて幅方向の熱伝導率が高いシートとしては、厚み方向に結晶を積層させたカーボンシートやヒートプレートなどがあるが、ヒートプレートに比べ安価で軽量なカーボンシートが適している。ここで、カーボンシートは、結晶の配列方向により熱伝導率が異なり、厚み方向に結晶を積層させることにより、幅方向の熱伝導率は２００〜５００Ｗｈ／ｃｍ２と非常に高く、厚み方向の熱伝導率は１０Ｗｈ／ｃｍ２以下と幅方向の熱伝導率に比べて低くできる。このようなカーボンシートを使用することで、温度が高いところから温度が低いところへ効率的に熱を移動、拡散することができる。
The secondary battery according to the present invention will be described in detail below.
In the present invention, as a sheet having a high thermal conductivity in the width direction compared to the thickness direction, there are a carbon sheet or a heat plate in which crystals are laminated in the thickness direction. Is suitable. Here, the carbon sheet has a different thermal conductivity depending on the crystal arrangement direction, and by laminating the crystals in the thickness direction, the thermal conductivity in the width direction is as high as 200 to 500 Wh / cm 2. The conductivity can be reduced to 10 Wh / cm 2 or less compared to the thermal conductivity in the width direction. By using such a carbon sheet, heat can be efficiently transferred and diffused from a place where the temperature is high to a place where the temperature is low.
このため、電池を急速充電や高率放電したときに起こる集電部付近の局部的な発熱を、他の発熱していない部分に、熱を移動、拡散することができ、電池内の温度バラツキを少なくすることができる。そのため、集電部付近の部分的極板劣化が抑制され、電池寿命を延ばすことができる。 For this reason, the local heat generation near the current collector that occurs when the battery is rapidly charged or discharged at a high rate can be transferred and diffused to other parts that do not generate heat, resulting in temperature variations within the battery. Can be reduced. Therefore, partial electrode plate deterioration near the current collector is suppressed, and the battery life can be extended.
本発明において、ラミネート形電池に対しては、厚み方向に比べ幅方向の熱伝導率が高いシートを取り付けたハードケースに収納することが可能である。これにより、電池内の温度ばらつきを少なくさせることができるとともに、耐震性を持たせることができる。また、ラミネート形電池とハードケースの接する面に、両面粘着性であるゴム弾性体シートを配置することが好ましい。これにより、振動、衝撃によるハードケース内でのラミネート形電池の移動防止、振動及び衝撃吸収ができ、高耐震性を持たせることができる。 In the present invention, the laminated battery can be housed in a hard case attached with a sheet having a higher thermal conductivity in the width direction than in the thickness direction. Thereby, while being able to reduce the temperature variation in a battery, it can give earthquake resistance. Moreover, it is preferable to arrange | position the rubber elastic body sheet | seat which is double-sided adhesiveness in the surface which a laminated battery and a hard case contact. Thereby, the movement of the laminated battery in the hard case due to vibration and shock can be prevented, vibration and shock can be absorbed, and high earthquake resistance can be provided.
本発明におけるハードケースとしては、金属（例えば、アルミニウム、ステンレス、スチール、鉄−ニッケルメッキ、マグネシウム）製のハードケース、合成樹脂（例えば、ポリエチレン、ポリプロピレン等のポリオレフィン系樹脂、あるいはポリエチレンテレフタレート、ポリテトラフルオロエチレン、ポリアミド系樹脂等の高融点樹脂）製のハードケース、熱伝導性プラスチック等を用いることができる。
また、本発明におけるゴム弾性体シートとしては、例えばシリコーンゴムシート、エチレンプロピレンゴムシート（ＥＰＴまたはＥＰＤＭとも言う）、ブチルゴムシート（IIＲ）、アクリロニトリルブタジエンゴムシート（ＮＢＲ）等を用いることができる。
As a hard case in the present invention, a hard case made of metal (for example, aluminum, stainless steel, steel, iron-nickel plating, magnesium), a synthetic resin (for example, polyolefin resin such as polyethylene or polypropylene, polyethylene terephthalate, polytetra A hard case made of a high melting point resin such as fluoroethylene or polyamide resin, a heat conductive plastic, or the like can be used.
Moreover, as a rubber elastic body sheet in this invention, a silicone rubber sheet, an ethylene propylene rubber sheet (it is also called EPT or EPDM), a butyl rubber sheet (IIR), an acrylonitrile butadiene rubber sheet (NBR) etc. can be used, for example.
次に、本発明に係る二次電池について図１を参照して説明する。但し、図１では角形電池について説明するが、他の形状、例えば円筒型電池にも適用できる。
（第１の実施形態）
図１は、本発明の第１の実施形態に係る角形電池の概略的な斜視図を示す。図中の符番１は二次電池本体である。この二次電池本体１の上部には、柱状の正極端子２，柱状の負極端子３が夫々取付けられている。前記二次電池本体１の両主面（最大面積面）には、厚み方向に比べて幅方向の熱伝導率が高いシート４，５が夫々貼り合わされている。
Next, the secondary battery according to the present invention will be described with reference to FIG. However, although a rectangular battery is described in FIG. 1, it can be applied to other shapes, for example, a cylindrical battery.
(First embodiment)
FIG. 1 is a schematic perspective view of a prismatic battery according to a first embodiment of the present invention.
（第２の実施形態）
図２及び図３は本発明の第２の実施形態に係る角形電池であり、図２は概略的な斜視図、図３は図２の展開図である。なお、本実施形態はラミネート形電池をハードケースに収納した例であるが、収納形態はこの限りではない。
図中の１１は二次電池本体であり、その上部に角柱状の正極端子１２，角柱状の負極端子１３が夫々取り付けられている。前記二次電池本体１１の両主面（最大面積面）には、厚み方向に比べて幅方向の熱伝導率が高いシート１４，１５が夫々貼り合わされている。
(Second Embodiment)
2 and 3 show a prismatic battery according to a second embodiment of the present invention, FIG. 2 is a schematic perspective view, and FIG. 3 is a developed view of FIG. In addition, although this embodiment is an example which accommodated the laminated battery in the hard case, the accommodation form is not this limitation.
In the figure,
二次電池本体１１は、複数枚のラミネート形電池２１と、正極端子１２，負極端子１３に相当する部分が開口されたハードケース２２と、熱伝導シード２３，２４から構成されている。前記正極端子１２，負極端子１３は、ラミネート形電池２１の端子に夫々接続されている。
The
次に、本発明の具体的な実施例について説明する。
（参考例１）
発電素子を直接アルミ製ケースに収納、密封し、長さ１４０ｍｍ，幅８０ｍｍ，厚み１０ｍｍの定格容量１０Ａｈの角型リチウムイオン蓄電池を作製し、作製した角型リチウムイオン蓄電池の４周側面の内最大面積の２側面に、厚み方向に比べ幅方向の熱伝導率が高いカーボンシートを、熱伝導性接着剤を用いて貼り付けた。この二次電池（組電池）をＡとした。
Next, specific examples of the present invention will be described.
( Reference Example 1)
The power generation element is directly housed in an aluminum case and sealed to produce a prismatic lithium ion storage battery with a rated capacity of 10 Ah having a length of 140 mm, a width of 80 mm, and a thickness of 10 mm. A carbon sheet having a higher thermal conductivity in the width direction than in the thickness direction was attached to two side surfaces of the area using a heat conductive adhesive. This secondary battery (assembled battery) was designated as A.
（参考例２）
発電素子をラミネートパックに収納、密封し、長さ１２０ｍｍ，幅７５ｍｍ，厚み４ｍｍの定格容量５Ａｈのラミネート形リチウムイオン蓄電池を作製した。また、厚み方向に比べ幅方向の熱伝導率が高いカーボンシートを、熱伝導性接着剤を用いて貼り付けたアルミ製ケースを作製した。次に、そのアルミ製ケースの中に、ラミネート形リチウムイオン蓄電池を２個積層し、端子にて並列接続して収納し、長さ１４０ｍｍ，幅８０ｍｍ，厚み１０ｍｍの定格容量１０Ａｈの角型リチウムイオン蓄電池を作成した。この電池をＢとした。
( Reference Example 2)
The power generating element was housed in a laminate pack and sealed to produce a laminated lithium ion storage battery having a rated capacity of 5 Ah and a length of 120 mm, a width of 75 mm, and a thickness of 4 mm. Moreover, the aluminum case which produced the carbon sheet whose heat conductivity of the width direction was high compared with the thickness direction using the heat conductive adhesive agent was produced. Next, two laminated lithium ion storage batteries are stacked in the aluminum case, and are connected in parallel at terminals, and are stored in parallel, and rectangular lithium ions with a rated capacity of 10 Ah having a length of 140 mm, a width of 80 mm, and a thickness of 10 mm. A storage battery was created. This battery was designated as B.
（実施例３）
発電素子をラミネートパックに収納、密封し、長さ１２０ｍｍ，幅７５ｍｍ，厚み４ｍｍの定格容量５Ａｈのラミネート形リチウムイオン蓄電池を作製した。また、厚み方向に比べ幅方向の熱伝導率が高いカーボンシートを、熱伝導性接着剤を用いて貼り付けたアルミ製ケースを作製した。次に、そのアルミ製ケースの中に、ラミネート形リチウムイオン蓄電池を２個積層し、端子にて並列接続してラミネート形リチウムイオン蓄電池がアルミ製ケースと当接する面の最大面積の２側面に、ゴム弾性両面粘着性の熱伝導性シリコーンゴムシートを貼り、収納して、長さ１４０ｍｍ，幅８０ｍｍ，厚み１０ｍｍの定格容量１０Ａｈの角型リチウムイオン蓄電池を作成した。この電池をＣとした。
(Example 3)
The power generating element was housed in a laminate pack and sealed to produce a laminated lithium ion storage battery having a rated capacity of 5 Ah and a length of 120 mm, a width of 75 mm, and a thickness of 4 mm. Moreover, the aluminum case which produced the carbon sheet whose heat conductivity of the width direction was high compared with the thickness direction using the heat conductive adhesive agent was produced. Next, in the aluminum case, two laminated lithium ion batteries are stacked, connected in parallel at the terminals, and the two sides of the maximum area of the surface where the laminated lithium ion batteries contact the aluminum case, A rubber-elastic double-sided adhesive heat conductive silicone rubber sheet was pasted and housed to produce a square lithium ion storage battery having a rated capacity of 10 Ah and a length of 140 mm, a width of 80 mm, and a thickness of 10 mm. This battery was designated as C.
なお、弾性両面接着性の熱伝導性シリコーンゴムシートは、アルミ製ケースと当接する面に設ける例を示したが、蓄電池間に設けてもよい。その際、蓄電池間に設ける熱伝導性シリコーンゴムシートは、少なくとも一部がアルミ製ケースと当接するように配置することが好ましい。 In addition, although the example in which the elastic double-sided adhesive heat conductive silicone rubber sheet is provided on the surface in contact with the aluminum case has been shown, it may be provided between the storage batteries. In that case, it is preferable to arrange | position so that a heat conductive silicone rubber sheet provided between storage batteries may contact | abut at least one part with an aluminum case.
（実施例４）
カーボンシートに替えて、ヒートプレートを使用した以外は実施例３と同様に、長さ１４０ｍｍ、幅８０ｍｍ、厚み１０ｍｍの定格容量１０Ａｈの角型リチウムイオン蓄電池を作成した。この電池をＤとした。
Example 4
A square lithium ion storage battery having a rated capacity of 10 Ah and a length of 140 mm, a width of 80 mm, and a thickness of 10 mm was prepared in the same manner as in Example 3 except that a heat plate was used instead of the carbon sheet. This battery was designated as D.
（比較例１）
カーボンシート及び熱伝導接着剤を使用しなかった以外は、参考例１と同様に発電素子をアルミ製ケースに収納、密封し、長さ１２０ｍｍ，幅８０ｍｍ，厚み１０ｍｍの定格容量１０Ａｈの角型リチウムイオン蓄電池を作製した。この電池をＥとした。
(Comparative Example 1)
Except not using a carbon sheet and a heat conductive adhesive, the power generation element was housed in an aluminum case and sealed in the same manner as in Reference Example 1, and the prismatic lithium with a rated capacity of 10 Ah having a length of 120 mm, a width of 80 mm, and a thickness of 10 mm was obtained. An ion storage battery was produced. This battery was designated E.
（比較例２）
カーボンシート及び熱伝導接着剤を使用しなかった以外は、参考例２と同様に発電素子をラミネートパックに収納、密封し、長さ１２０ｍｍ，幅７５ｍｍ，厚み４ｍｍの定格容量５Ａｈのラミネート形リチウムイオン蓄電池を作製した。次に、そのラミネート形リチウムイオン蓄電池を、アルミ製ケースの中に２個積層し、端子にて並列接続して収納し、長さ１４０ｍｍ，幅８０ｍｍ，厚み１０ｍｍの定格容量１０Ａｈの角型リチウムイオン蓄電池を作成した。この電池をＦとした。
(Comparative Example 2)
Except that no carbon sheet and heat conductive adhesive were used, the power generating element was housed in a laminate pack and sealed in the same manner as in Reference Example 2, and the laminated lithium ion with a rated capacity of 5 Ah having a length of 120 mm, a width of 75 mm, and a thickness of 4 mm was obtained. A storage battery was produced. Next, two of the laminated lithium ion storage batteries are stacked in an aluminum case, connected in parallel at terminals and stored, and prismatic lithium ions having a rated capacity of 10 Ah and a length of 140 mm, a width of 80 mm, and a thickness of 10 mm. A storage battery was created. This battery was designated as F.
［実験１］
上述した本発明による電池Ａ，Ｂ，Ｃ，Ｄと比較例による電池Ｅ，Ｆを、以下の条件で充放電を繰り返した。１０００回繰り返した後の容量維持率は、下記表１に示すとおりである。但し、充電条件、放電条件は、次のとおりである。
充電条件：ＣＣ−ＣＶ １．０ＣＡ，３．６５Ｖ，０．０５ＣＡ Ｃｕｔ−ｏｆｆ
放電条件：ＣＣ ３．０ＣＡ，２．０Ｖ Ｃｕｔ−ｏｆｆ
The above-described batteries A, B, C and D according to the present invention and the batteries E and F according to the comparative examples were repeatedly charged and discharged under the following conditions. The capacity retention rate after repeating 1000 times is as shown in Table 1 below. However, charging conditions and discharging conditions are as follows.
Charging conditions: CC-CV 1.0CA, 3.65V, 0.05CA Cut-off
Discharge condition: CC 3.0CA, 2.0V Cut-off
上記結果から分かるように、本発明の電池は、急速充放電を１０００回繰り返した後でも約９０％の容量を維持することができた。
なお、電池Ｃと電池Ｄは熱伝導性の高いシートとしてカーボンシート（電池Ｃ）とヒートプレート（電池Ｄ）とを夫々用いたものであるが、容量維持率は略同等であり、コストの面からカーボンシートを使用することが好ましい。
As can be seen from the above results, the battery of the present invention was able to maintain a capacity of about 90% even after rapid charge and discharge was repeated 1000 times.
The batteries C and D use a carbon sheet (battery C) and a heat plate (battery D) as sheets having high thermal conductivity, respectively, but the capacity retention rates are substantially the same, and the cost is low. It is preferable to use a carbon sheet.
［試験２］
上述した本発明による電池Ａ，Ｂ，Ｃ，Ｄと比較例による電池Ｅ，Ｆを、以下の条件で振動試験を行った。前記振動試験は、夫々の電池（Ａ〜Ｆ）の両端の側面を固定具によって固定して行った。その結果を下記表２に示す。表２中の「良好」は、前記振動試験によりリードタブの破断やラミネートフィルムの破れが発生しなかったもの、「不良」は破断や破れが発生したものである。但し、振動条件は次のとおりである。
（振動条件）
規格：ＭＩＬ−ＳＴＤ−８１０ ＦＩＧＵＲＥ Ｃ−８
パワースペクトル密度：０．０７７ｇ２／Ｈｚ
方向：Ｘ方向，Ｙ方向，Ｚ方向
時間：各方向３時間
The above-described batteries A, B, C, and D according to the present invention and batteries E and F according to comparative examples were subjected to vibration tests under the following conditions. The vibration test was performed by fixing the side surfaces of both ends of each battery (A to F) with a fixture. The results are shown in Table 2 below. In Table 2, “good” indicates that no breakage of the lead tab or laminate film occurred in the vibration test, and “bad” indicates that breakage or breakage occurred. However, the vibration conditions are as follows.
(Vibration conditions)
Standard: MIL-STD-810 FIGURE C-8
Power spectral density: 0.077 g 2 / Hz
Direction: X direction, Y direction, Z direction
Time: 3 hours in each direction
上記結果から分かるように、本発明の電池は十分な耐振構造であることを示した。 As can be seen from the above results, the battery of the present invention was shown to have a sufficient vibration-proof structure.
なお、本発明は、上記実施形態そのままに限定されるものではなく、実施段階ではその要旨を逸脱しない範囲で構成要素を変形して具体化できる。また、上記実施形態に開示されている複数の構成要素の適宜な組み合せにより種々の発明を形成できる。例えば、実施形態に示される全構成要素から幾つかの構成要素を削除してもよい。更に、異なる実施形態に亘る構成要素を適宜組み合せてもよい。 Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. Further, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, you may combine suitably the component covering different embodiment.
１…二次電池本体、２，１２…陽極端子、３，１３…陰極端子、４，５…熱伝導率が高いシート、２１…ラミネート形の電池、２２…ハードケース、２３，２４…熱伝導シート。
DESCRIPTION OF
Claims (2)
前記二次電池本体を収納するハードケースと、
前記二次電池本体と前記ハードケースの接する面に配置された、両面粘着性を有する熱伝導性ゴム弾性体シートと、
前記ハードケースの１面以上に取り付けられた、厚み方向に比べて幅方向の熱伝導率が高いシートと
を有することを特徴とする二次電池。 A secondary battery body constructed by arranging one or more laminated batteries,
A hard case for storing the secondary battery body;
A thermally conductive rubber elastic sheet having a double-sided adhesive property, disposed on the surface where the secondary battery main body and the hard case are in contact;
A sheet attached to one or more surfaces of the hard case and having a higher thermal conductivity in the width direction than in the thickness direction
A secondary battery comprising:
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| CN108987614A (en) * | 2017-05-31 | 2018-12-11 | 深圳市比亚迪锂电池有限公司 | A kind of battery case and battery |
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| KR101392799B1 (en) * | 2012-06-07 | 2014-05-14 | 주식회사 엘지화학 | Battery Module Having Structure of Improved Stability and High Cooling Efficiency |
| JP5916124B2 (en) * | 2012-08-10 | 2016-05-11 | 本田技研工業株式会社 | Power storage device |
| JP2015060712A (en) * | 2013-09-18 | 2015-03-30 | 株式会社東芝 | Secondary battery |
| KR102478780B1 (en) * | 2019-01-09 | 2022-12-20 | 비와이디 컴퍼니 리미티드 | battery pack and car |
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| JP5061406B2 (en) * | 2000-10-12 | 2012-10-31 | 株式会社Ｇｓユアサ | Battery pack |
| JP4923679B2 (en) * | 2006-03-31 | 2012-04-25 | トヨタ自動車株式会社 | Stacked battery |
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| CN108987614A (en) * | 2017-05-31 | 2018-12-11 | 深圳市比亚迪锂电池有限公司 | A kind of battery case and battery |
| CN108987614B (en) * | 2017-05-31 | 2022-02-08 | 深圳市比亚迪锂电池有限公司 | Battery shell and battery |
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