JPH1145691A - Battery pack - Google Patents
Battery packInfo
- Publication number
- JPH1145691A JPH1145691A JP9201639A JP20163997A JPH1145691A JP H1145691 A JPH1145691 A JP H1145691A JP 9201639 A JP9201639 A JP 9201639A JP 20163997 A JP20163997 A JP 20163997A JP H1145691 A JPH1145691 A JP H1145691A
- Authority
- JP
- Japan
- Prior art keywords
- battery
- batteries
- silicone
- battery pack
- battery case
- 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.)
- Pending
Links
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
- Battery Mounting, Suspending (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、電池パックに関す
るものである。TECHNICAL FIELD The present invention relates to a battery pack.
【０００２】[0002]
【従来の技術】自動車に搭載されている始動用電池や、
フォークリフト等電動車に搭載されている車輌駆動電源
用電池ケースの固定は、金具等による締め付けによりな
されていた。このような締め付けによる固定は緩衝作用
を有していないため、車両の振動が直接電池に伝搬して
しまい、電池の性能低下が避けられなかった。そこで従
来から車輌等に搭載される電池の、振動や衝撃により生
ずる性能劣化を抑制するために様々な工夫がなされてき
た。前記性能劣化とは、電池内部の発電素子が壊される
ことや、電極から外部端子への集電機構の破壊等であ
る。例えば近年急激に普及しつつある、非水電解液二次
電池であるリチウムイオン二次電池を用いた電池パック
では、電池と電池ケースの固定に際し、緩衝機能を有す
るウレタン系弾性シーラントを使用し、電池パックを構
成する電池と電池ケースを接着固定する技術が提案され
ている（特開平９−９２２３７号公報）。2. Description of the Related Art Starting batteries mounted on automobiles,
A battery case for a vehicle drive power source mounted on an electric vehicle such as a forklift is fixed by fastening with metal fittings or the like. Such fixing by fastening does not have a buffering effect, so that the vibration of the vehicle is directly transmitted to the battery, and the performance of the battery cannot be reduced. Therefore, various devices have been conventionally devised in order to suppress performance deterioration of a battery mounted on a vehicle or the like caused by vibration or impact. The performance degradation is, for example, damage to a power generating element inside the battery, breakage of a current collecting mechanism from an electrode to an external terminal, or the like. For example, in recent years, a battery pack using a lithium ion secondary battery, which is a non-aqueous electrolyte secondary battery, which is rapidly spreading, uses a urethane-based elastic sealant having a buffer function when fixing the battery and the battery case, A technique for bonding and fixing a battery constituting a battery pack and a battery case has been proposed (JP-A-9-92237).
【０００３】[0003]
【発明が解決しようとする課題】しかしながら上記ウレ
タン系弾性シーラントは、最高使用温度が約８０℃であ
り、耐熱性に乏しい。仮に車両駆動用の電源としての電
池パックに、緩衝材としてのウレタン系弾性シーラント
を用いたとすると、夏場は頻繁に車体の中が９０℃程度
になるため、緩衝材はしだいに劣化し、その役割を果た
さなくなる。本発明が解決しようとする課題は、高温下
においても振動、衝撃に対して性能劣化しにくい電池パ
ックを提供することである。However, the urethane-based elastic sealant has a maximum use temperature of about 80 ° C. and is poor in heat resistance. Assuming that a urethane-based elastic sealant is used as a cushioning material for a battery pack as a power source for driving a vehicle, the inside of the vehicle body frequently reaches about 90 ° C. in summer, so the cushioning material gradually deteriorates, and its role. Will not play. The problem to be solved by the present invention is to provide a battery pack that is hardly deteriorated in performance against vibration and impact even at high temperatures.
【０００４】[0004]
【課題を解決するための手段】上記課題を解決するため
に本発明の電池パックは、電池２と電池ケース４とが接
触し得る箇所の全部あるいは一部にシリコーン系弾性体
（緩衝材１）を配置し、電池２と電池ケース４との間の
緩衝機能を保持させることを特徴とする。上記電池ケー
ス４とは、電池パックを構成する部材の内、電池２とそ
こから外部端子までの電気接続部材以外の部材のことで
ある。例えば図１におけるスペーサ３は電池ケース４の
カテゴリーに属する。上記電池２と電池ケース４とが接
触し得る箇所とは、例えば図１から確認できる電池ケー
ス４内壁凸部と、電池２外周面との間や、図１から確認
できるスペーサ３の端部、骨部と、電池２外周面との間
等である。電池２と電池ケース４との間の緩衝機能を有
することができるなら、上記電池２と電池ケース４とが
接触し得る箇所全部に緩衝材１を配置する必要は必ずし
もなく、部分的に緩衝材を配置してもよい。上記シリコ
ーン系弾性体とは、シリコーンゴム、シリコーン系弾性
シーラント等である。In order to solve the above-mentioned problems, a battery pack of the present invention has a silicone-based elastic material (buffer material 1) provided on all or a part of a portion where the battery 2 and the battery case 4 can come into contact. Are arranged, and a buffer function between the battery 2 and the battery case 4 is maintained. The battery case 4 is a member other than the battery 2 and the electrical connection members from the battery 2 to the external terminals among the members constituting the battery pack. For example, the spacer 3 in FIG. 1 belongs to the category of the battery case 4. The places where the battery 2 and the battery case 4 can come into contact with each other include, for example, a space between the inner wall convex portion of the battery case 4 which can be confirmed from FIG. For example, between the skeleton and the outer peripheral surface of the battery 2. If it is possible to have a buffering function between the battery 2 and the battery case 4, it is not necessary to dispose the buffer 1 at all places where the battery 2 and the battery case 4 can come into contact with each other. May be arranged. The silicone-based elastic body is a silicone rubber, a silicone-based elastic sealant, or the like.
【０００５】シリコーン系弾性体は、その最高使用温度
が約２８０℃であり、かなりの高温下においても緩衝機
能を失わず、電池パックが振動、衝撃を受けても電池２
が性能劣化しにくい。またシリコーン系弾性体は、前述
したウレタン系弾性体よりも、低温下における緩衝機
能維持特性、絶縁性、加工性、の点でも優れてい
る。The silicone-based elastic body has a maximum operating temperature of about 280 ° C., does not lose its buffering function even at a considerably high temperature, and has a low battery capacity even when the battery pack is subjected to vibration or impact.
But performance is hardly deteriorated. Further, the silicone-based elastic body is superior to the above-mentioned urethane-based elastic body in terms of a buffer function maintaining property at a low temperature, insulation properties, and workability.
【０００６】[0006]
【発明の実施の形態】図１に本発明の電池パックの一例
を示す。電池２には２０Ａｈの電気容量の円筒形リチウ
ムイオン二次電池を８本使用し、図に示すようにスペー
サ３を介して電池ケース４内に二段に配置する。電池２
の外周面には緩衝材１として、シリコーンゴムを太さ４
ｍｍのＯリング状に加工したものを用い、電池２外周面
に密着するようはめ込む。このとき、図１から確認でき
る電池ケース４内壁凸部と、電池２外周面との間に上記
Ｏリングが存在するように配慮した。同様にスペーサ３
の端部、骨部と、電池２外周面との間にも上記Ｏリング
が存在するように配慮した。従って本例は電池２と電池
ケース４とが接触し得る箇所の全部にシリコーン系弾性
体（緩衝材１）を配置した例である。電池２と電池ケー
ス４との間には緩衝機能を有するように緩衝材１を配置
している。その後８本のリチウムイオン二次電池を直列
に接続し、正極、負極リードを外部端子に接続する。そ
して電池ケース４の各部品（スペーサ３を含む）を一体
化し、本発明の電池パックを完成させる。FIG. 1 shows an example of a battery pack according to the present invention. As the battery 2, eight cylindrical lithium ion secondary batteries having a capacity of 20 Ah are used, and are arranged in two stages in a battery case 4 via a spacer 3 as shown in the figure. Battery 2
Of silicone rubber as cushioning material 1
Using an O-ring processed to a thickness of 2 mm, it is fitted so as to be in close contact with the outer peripheral surface of the battery 2. At this time, care was taken so that the O-ring existed between the convex portion of the inner wall of the battery case 4 which can be confirmed from FIG. Similarly, spacer 3
Care was taken so that the O-ring also existed between the end portion, the bone portion, and the outer peripheral surface of the battery 2. Therefore, this example is an example in which the silicone-based elastic body (the cushioning material 1) is arranged at all the places where the battery 2 and the battery case 4 can come into contact. The buffer material 1 is disposed between the battery 2 and the battery case 4 so as to have a buffer function. Thereafter, eight lithium ion secondary batteries are connected in series, and the positive and negative leads are connected to external terminals. Then, the components (including the spacer 3) of the battery case 4 are integrated to complete the battery pack of the present invention.
【０００７】本例ではシリコーン系弾性体にＯリング形
状のシリコーンゴムを用いたが、これに限定されない。
シリコーン系弾性体としてシリコーン系弾性シーラント
を用い、当該シーラントにより電池２を電池ケース４に
接着固定してもよい。但し、前者は予め所定の形状に加
工できる利点や、その取扱性の良さから、シリコーン系
弾性体を電池パック内に配置する工程が簡易化される利
点があると考えられる。また後者を用いると、シリコー
ン系弾性体の位置決めの配慮にある程度余裕が得られる
利点があると考えられる。また本例では電池２にリチウ
ムイオン二次電池を用いたが、これに限定されない。但
し、リチウムイオン二次電池を構成する、有機溶媒を含
む非水電解液は可燃性であり、且つ電極は化学的に活性
度の高いものであるため、その安全性が特に懸念されて
いる電池系である。従って電池パックを構成するに際
し、本発明を採用することは、他の電池系を用いた場合
よりも安全性向上の点で効果が大きいと考えられる。ま
た本例では電池２に円筒形電池を採用しているが、これ
に限定されない。角形、楕円形等の非円筒形電池にも適
用可能である。また単位電池パック当たりの電池の数に
ついても本例に限定されない。また複数の電池２で電池
パックを構成する際に、それらの接続状態は自由に設定
可能である。In this embodiment, an O-ring shaped silicone rubber is used as the silicone-based elastic body, but the invention is not limited to this.
The battery 2 may be bonded and fixed to the battery case 4 by using a silicone-based elastic sealant as the silicone-based elastic body. However, it is considered that the former has an advantage that it can be processed into a predetermined shape in advance and has an advantage that the process of arranging the silicone-based elastic body in the battery pack is simplified because of its good handleability. It is considered that the use of the latter has an advantage that a certain margin can be obtained in consideration of positioning of the silicone-based elastic body. In this example, a lithium ion secondary battery is used as the battery 2; however, the present invention is not limited to this. However, the non-aqueous electrolyte containing an organic solvent, which constitutes a lithium ion secondary battery, is flammable, and the electrodes have high chemical activity. System. Therefore, it is considered that adopting the present invention when configuring a battery pack is more effective in improving safety than using another battery system. In this example, a cylindrical battery is used as the battery 2; however, the present invention is not limited to this. The present invention is also applicable to non-cylindrical batteries such as rectangular and elliptical batteries. Also, the number of batteries per unit battery pack is not limited to this example. When a battery pack is composed of a plurality of batteries 2, their connection state can be set freely.
【０００８】本発明の電池パックは高温下での耐振動
性、耐衝撃性に優れるため、高温下で振動、衝撃が電池
パックに付与される環境にさらされやすい、電気自動車
等の車両駆動用電源として搭載することが特に適してい
ると考えられる。Since the battery pack of the present invention is excellent in vibration resistance and impact resistance at high temperatures, it is easily exposed to an environment in which vibration and impact are applied to the battery pack at high temperatures, and is used for driving vehicles such as electric vehicles. It is believed that mounting as a power supply is particularly suitable.
【０００９】[0009]
【実施例】上記発明の実施の形態の電池パック（実施
例）と、ウレタン系弾性シーラントにより単電池と電池
ケースを接着固定した以外は実施例と同条件の製法によ
る電池パック（従来例１）と、緩衝材を全く用いない以
外は実施例と同条件の製法による電池パック（従来例
２）とを作製し、比較検討した。本来従来例１に用いる
ウレタン系弾性体には、Ｏリング状のウレタンゴムを用
い、実施例と同様に緩衝材を配置した電池パックについ
て比較検討すべきであるが、ウレタンゴムを太さ４ｍｍ
のＯリング形状に加工することは、シリコーンゴムに比
較して多少困難であるため、ウレタン系弾性シーラント
により単電池と電池ケースを接着固定した電池パックを
用いた。DESCRIPTION OF THE PREFERRED EMBODIMENTS A battery pack manufactured according to the same method as in the embodiment except that the battery pack (embodiment) according to the embodiment of the present invention and the battery case are adhered and fixed with a urethane-based elastic sealant (conventional example 1). And a battery pack (conventional example 2) manufactured by the same method as the example except that no cushioning material was used, and a comparative study was conducted. Originally, an O-ring-shaped urethane rubber should be used for the urethane-based elastic body used in Conventional Example 1, and a battery pack in which a cushioning material is arranged as in the embodiment should be compared and examined.
Since it is somewhat difficult to process into an O-ring shape as compared with silicone rubber, a battery pack having a unit cell and a battery case bonded and fixed with a urethane-based elastic sealant was used.
【００１０】（実験）上記作製した電池パック（実施
例、従来例１、２）をそれぞれ２０Ａで充電し、電池パ
ックを構成する単電池の中で、どれか一つでも端子電圧
が４．２Ｖに達したら充電をやめ、次いで３．７Ａで放
電を開始し、電池パックを構成する単電池の中で、どれ
か一つでも端子電圧が３．２Ｖに達したら放電をやめる
充放電サイクル寿命試験を実施した。なお、前記試験実
施中の周囲温度は９０℃とした。更に前記試験中、放電
時のみ単振動、振幅２．３〜２．５ｍｍ、加速度３Ｇの
条件で、電池パックに振動、衝撃を与えた。そのときの
充放電サイクル数に対する容量の変化を図２に示す。こ
の結果、振動が直接単電池に伝わる従来例２は、初期特
性は他の電池と同一にもかかわらず、５００サイクル目
以降急激に容量低下を起した。また従来例１も７００サ
イクル目以降容量低下を起し始めている。これに対し実
施例は１０００サイクルを超えても顕著な容量低下が観
測されないことがわかった。実施例の電池パックは緩衝
材として、Ｏリング状シリコーンゴムを用い、それを電
池周面に密着するようはめ込んだ構成だが、シリコーン
系弾性シーラントにより、従来例１と同様の手法で単電
池と電池ケースを接着固定した電池パックについて上記
実験を実施しても、図２における実施例と同様の結果が
得られた。(Experiment) Each of the battery packs (Examples and Conventional Examples 1 and 2) prepared above was charged at 20 A, and any one of the cells constituting the battery pack had a terminal voltage of 4.2 V. The charge / discharge cycle life test stops charging when the voltage reaches 3.2V, then starts discharging at 3.7A, and stops discharging when any one of the cells constituting the battery pack reaches 3.2V. Was carried out. The ambient temperature during the test was 90 ° C. Further, during the test, the battery pack was subjected to vibration and impact under the conditions of a single vibration, an amplitude of 2.3 to 2.5 mm, and an acceleration of 3 G only during discharging. FIG. 2 shows a change in capacity with respect to the number of charge / discharge cycles at that time. As a result, in Conventional Example 2, in which the vibration is directly transmitted to the unit cell, the capacity rapidly decreased after the 500th cycle even though the initial characteristics were the same as those of the other cells. Also, in Conventional Example 1, the capacity is starting to decrease after the 700th cycle. On the other hand, it was found that no remarkable capacity reduction was observed in the examples even after more than 1000 cycles. The battery pack of the embodiment uses an O-ring silicone rubber as a cushioning material, and is fitted so as to be in close contact with the battery peripheral surface. Even when the above-described experiment was performed on the battery pack having the case bonded and fixed, the same result as the example in FIG. 2 was obtained.
【００１１】[0011]
【発明の効果】本発明により、高温下においても振動、
衝撃に対して性能劣化しにくい電池パックを提供するこ
とができた。According to the present invention, vibrations can be obtained even at high temperatures,
It is possible to provide a battery pack that is unlikely to deteriorate in performance due to impact.
【図１】本発明の電池パックの一例を示す図である。FIG. 1 is a diagram showing an example of a battery pack of the present invention.
【図２】電池パックの充放電サイクル数と、電池容量と
の関係を示す図である。FIG. 2 is a diagram showing a relationship between the number of charge / discharge cycles of a battery pack and a battery capacity.
１．緩衝材 ２．電池 ３．スペーサ ４．電池ケース 1. 1. cushioning material Battery 3. Spacer 4. Battery case
Claims (5)
るようにした電池パックにおいて、 前記電池と電池ケースとが接触し得る箇所の全部あるい
は一部にシリコーン系弾性体を配置し、前記電池と電池
ケースとの間の緩衝機能を保持させることを特徴とする
電池パック。1. A battery pack in which one or a plurality of batteries are accommodated in a battery case, wherein a silicone-based elastic body is arranged at all or a part of a place where the battery and the battery case can come into contact with each other. A battery pack having a buffer function between a battery and a battery case.
が電池周面に密着するようはめ込んだシリコーンゴム製
のＯリングであることを特徴とする請求項１記載の電池
パック。2. The battery pack according to claim 1, wherein the battery has a cylindrical shape and an O-ring made of silicone rubber fitted with a silicone elastic body so as to be in close contact with the peripheral surface of the battery.
ーラントであり、電池を電池ケースに接着固定する機能
を有することを特徴とする請求項１記載の電池パック。3. The battery pack according to claim 1, wherein the silicone-based elastic body is a silicone-based elastic sealant and has a function of bonding and fixing the battery to the battery case.
〜３のいずれかに記載の電池パック。4. The battery according to claim 1, wherein the battery is a non-aqueous electrolyte secondary battery.
4. The battery pack according to any one of claims 3 to 3.
のいずれかに記載の電池パック。5. The battery according to claim 1, wherein the battery is a power source for driving a vehicle.
The battery pack according to any one of the above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9201639A JPH1145691A (en) | 1997-07-28 | 1997-07-28 | Battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9201639A JPH1145691A (en) | 1997-07-28 | 1997-07-28 | Battery pack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH1145691A true JPH1145691A (en) | 1999-02-16 |
Family
ID=16444427
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9201639A Pending JPH1145691A (en) | 1997-07-28 | 1997-07-28 | Battery pack |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH1145691A (en) |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2789228A1 (en) * | 1999-01-28 | 2000-08-04 | Sanyo Electric Co | Electrical supply junction for automobile electrical systems, comprises a modular construction with parallel connected electrical units |
| WO2006126447A1 (en) * | 2005-05-23 | 2006-11-30 | Matsushita Electric Industrial Co., Ltd. | Battery module and method of producing the same |
| JP2008066061A (en) * | 2006-09-06 | 2008-03-21 | Hitachi Vehicle Energy Ltd | Secondary battery module |
| KR100886571B1 (en) * | 2006-08-07 | 2009-03-05 | 주식회사 엘지화학 | Battery Pack Case |
| JP2010177204A (en) * | 2005-05-23 | 2010-08-12 | Panasonic Corp | Battery module and method of manufacturing the same |
| US7919203B2 (en) | 2004-10-08 | 2011-04-05 | Honda Motor Co., Ltd. | Battery box structure, inter-locking structure of electrical equipment box, and electrical equipment box structure |
| EP2390943A1 (en) | 2010-05-26 | 2011-11-30 | Yokogawa Electric Corporation | Battery housing device |
| WO2012081173A1 (en) * | 2010-12-16 | 2012-06-21 | パナソニック株式会社 | Battery pack |
| CN103117367A (en) * | 2011-09-28 | 2013-05-22 | 索尼公司 | Battery holder, battery receiving case, battery pack, electricity accumulation system, and electronic instrument |
| TWI467831B (en) * | 2009-05-08 | 2015-01-01 | Hon Hai Prec Ind Co Ltd | Battery holder and electronic device having the same |
| US20150180097A1 (en) * | 2012-10-18 | 2015-06-25 | Bayerische Motoren Werke Aktiengesellschaft | Energy Storage Module and Method for Production of Energy Storage Module |
| WO2017191135A3 (en) * | 2016-05-03 | 2018-01-11 | Moog Unna Gmbh | Energy storage assembly with a resilient layer |
| KR20180087606A (en) * | 2017-01-25 | 2018-08-02 | 주식회사 엘지화학 | Cylindrical Battery Cell Covered with Damping Member of Polymer Foam |
| WO2019189280A1 (en) * | 2018-03-27 | 2019-10-03 | パナソニックＩｐマネジメント株式会社 | Power storage module |
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-
1997
- 1997-07-28 JP JP9201639A patent/JPH1145691A/en active Pending
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| US10439175B2 (en) | 2014-02-28 | 2019-10-08 | Samsung Sdi Co., Ltd. | Rechargeable battery pack |
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| WO2017191135A3 (en) * | 2016-05-03 | 2018-01-11 | Moog Unna Gmbh | Energy storage assembly with a resilient layer |
| KR20180087606A (en) * | 2017-01-25 | 2018-08-02 | 주식회사 엘지화학 | Cylindrical Battery Cell Covered with Damping Member of Polymer Foam |
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