JP2003077434A - Battery pack and its manufacturing method - Google Patents
Battery pack and its manufacturing methodInfo
- Publication number
- JP2003077434A JP2003077434A JP2001263707A JP2001263707A JP2003077434A JP 2003077434 A JP2003077434 A JP 2003077434A JP 2001263707 A JP2001263707 A JP 2001263707A JP 2001263707 A JP2001263707 A JP 2001263707A JP 2003077434 A JP2003077434 A JP 2003077434A
- Authority
- JP
- Japan
- Prior art keywords
- battery
- resin
- battery pack
- resin molding
- molding
- 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.)
- Granted
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
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、パック電池とその
製造方法に関し、とくに電池を金型の成形室に仮り止め
して、電池に連結してプラスチック製の樹脂成形部を成
形するパック電池とその製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery pack and a method for manufacturing the battery pack, and more particularly, to a battery pack in which a battery is temporarily fixed in a molding chamber of a mold and is connected to the battery to form a plastic resin molding portion. The manufacturing method is related.
【０００２】[0002]
【従来の技術】パック電池の外装ケースを樹脂成形部と
し、この樹脂成形部を成形するときに電池をインサート
成形して固定しているパック電池は開発されている。イ
ンサート成形は、合成樹脂を成形する金型の成形室に、
電池やプリント基板等を仮り止めし、成形室に注入され
る合成樹脂を仮り止めしている電池やプリント基板を密
着するように成形する。このため、成形された樹脂成形
部には、電池やプリント基板を一体的に固定することが
できる。この方法は、樹脂成形部を成形するときに電池
やプリント基板を定位置にしっかりと固定できる特長が
ある。別に成形したプラスチックケースに電池等を定位
置に収納する組み立て工程を省略できる。すなわち、成
形と固定を同時にすることができるので、安価に能率よ
く多量生産できる特長がある。この方法で製造されるパ
ック電池は、特開2000-315483号公報に記載される。こ
のパック電池は、図１に示すように、外装ケースとなる
樹脂成形部を成形するときに、プリント基板５や電池２
を金型１０の成形室１１に仮り止めし、成形室１１に溶
融状態の合成樹脂を注入して製作される。このパック電
池は、樹脂成形部にプリント基板５や電池２の一部をイ
ンサート成形して固定する。このパック電池は、従来の
パック電池のように、電池とプリント基板を、別に成形
しているケースに入れて組み立てる必要がなく、ケース
に相当する樹脂成形部を成形する工程で、プリント基板
や電池を定位置に固定できる。2. Description of the Related Art A battery pack has been developed in which an outer case of a battery pack is used as a resin molding part and the battery is insert-molded and fixed when molding the resin molding part. Insert molding is performed in the molding chamber of the mold that molds synthetic resin.
The battery, the printed circuit board, and the like are temporarily fixed, and the synthetic resin injected into the molding chamber is temporarily fixed and the battery and the printed circuit board are molded so as to be in close contact with each other. Therefore, the battery and the printed circuit board can be integrally fixed to the molded resin molding portion. This method has a feature that the battery or the printed circuit board can be firmly fixed in place when the resin molding part is molded. It is possible to omit the assembly process of storing the battery and the like in a fixed position in a separately molded plastic case. That is, since molding and fixing can be performed at the same time, there is a feature that mass production can be performed inexpensively and efficiently. The battery pack manufactured by this method is described in JP-A-2000-315483. As shown in FIG. 1, this battery pack has a printed circuit board 5 and a battery 2 when a resin molding part which becomes an outer case is molded.
Is temporarily fixed to the molding chamber 11 of the mold 10 and a molten synthetic resin is injected into the molding chamber 11. In this battery pack, the printed circuit board 5 and a part of the battery 2 are insert-molded and fixed to the resin molding portion. Unlike conventional battery packs, this battery pack does not require the battery and printed circuit board to be separately assembled in a case, and is a process of molding a resin molding part that corresponds to the case. Can be fixed in place.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、この構
造のパック電池は、別に成形したケースに電池を収納す
る旧来のパック電池に比較して、安全弁を正常に動作さ
せるのが難しい。別に成形したケースに電池を収納して
いる旧来のパック電池は、電池の安全弁が開弁すると、
安全弁から排出されるガスをケースの内部に排出でき
る。ケースに排出されたガスはケースの隙間を通過して
外部に排出される。このため、この構造のパック電池
は、安全弁を正常に動作できる。しかしながら、プリン
ト基板等を樹脂成形部にインサート成形して製作される
パック電池は、開弁した安全弁から排出されるガスを速
やかに排気するのが難しい。樹脂成形部と電池との隙間
が狭くなって、ガスをスムーズに通過できないからであ
る。このため、電池の内圧が上昇するときに、安全弁を
開弁させて電池の内圧上昇を速やかに阻止できなくな
る。この弊害は、安全弁のない部分に樹脂成形部を固定
して解消できる。ただこの構造のパック電池は、安全弁
の開口部を外部に露出させるので、間違って安全弁が外
部から破壊されることがある。安全弁は、内圧で破壊さ
れやすいように弱く製作されるので、たとえばここに針
状の異物が接触すると破壊されてパック電池として使用
できなくなってしまう。However, in the battery pack having this structure, it is more difficult to normally operate the safety valve than the conventional battery pack in which the battery is housed in a separately molded case. The old battery pack, which contains the battery in a separately molded case, opens when the battery safety valve opens.
The gas discharged from the safety valve can be discharged inside the case. The gas discharged to the case passes through the gap of the case and is discharged to the outside. Therefore, in the battery pack having this structure, the safety valve can operate normally. However, in a battery pack manufactured by insert molding a printed circuit board or the like in a resin molding portion, it is difficult to quickly exhaust the gas discharged from the opened safety valve. This is because the gap between the resin molded part and the battery becomes narrow and gas cannot pass smoothly. Therefore, when the internal pressure of the battery rises, the safety valve cannot be opened to quickly prevent the internal pressure of the battery from rising. This adverse effect can be eliminated by fixing the resin molding portion to the portion without the safety valve. However, in the battery pack of this structure, the opening of the safety valve is exposed to the outside, so the safety valve may be accidentally destroyed from the outside. Since the safety valve is made weak so that it is easily broken by the internal pressure, if a needle-shaped foreign substance comes into contact with the safety valve, it will be broken and cannot be used as a battery pack.
【０００４】本発明は、このような欠点を解決すること
を目的に開発されたものである。本発明の重要な目的
は、安全弁を保護しながら、安全弁を正確に動作させて
電池の内圧上昇を確実に防止できるパック電池とその製
造方法を提供することにある。The present invention was developed for the purpose of solving such drawbacks. An important object of the present invention is to provide a battery pack and a method of manufacturing the battery pack, in which the safety valve can be operated accurately while the internal pressure of the battery is reliably prevented while protecting the safety valve.
【０００５】[0005]
【課題を解決するための手段】本発明のパック電池は、
電池２の内圧が設定圧力よりも高くなると開弁する安全
弁２１を有する電池２と、この電池２をインサート成形
して成形されてなるプラスチック製の樹脂成形部１とを
備える。樹脂成形部１は、樹脂成形部１を成形する合成
樹脂の侵入を阻止する樹脂侵入阻止部９を有する。この
パック電池は、樹脂侵入阻止部９で安全弁２１を樹脂成
形部１の外部に連通する排出経路を形成している。The battery pack of the present invention comprises:
A battery 2 having a safety valve 21 that opens when the internal pressure of the battery 2 becomes higher than a set pressure, and a plastic resin molding part 1 formed by insert molding the battery 2 are provided. The resin molding portion 1 has a resin intrusion prevention portion 9 that prevents invasion of the synthetic resin that molds the resin molding portion 1. In this battery pack, the resin intrusion prevention portion 9 forms a discharge path for connecting the safety valve 21 to the outside of the resin molding portion 1.
【０００６】さらに、本発明の請求項２に記載されるパ
ック電池は、電池２の内圧が設定圧力よりも高くなると
開弁する安全弁２１を有する電池２と、この電池２の定
位置に固定されるホルダー４と、ホルダー４と電池２を
インサート成形してホルダー４を電池２に固定している
プラスチック製の樹脂成形部１とを備える。ホルダー４
は、樹脂成形部１を成形する合成樹脂の侵入を阻止する
樹脂侵入阻止部９を有する。パック電池は、この樹脂侵
入阻止部９で安全弁２１を外部に連通する排出経路を形
成している。このパック電池は、電池２の凸部電極２Ｂ
を有する電極端面に安全弁２１を設けて、この電極端面
にホルダー４と樹脂成形部１を固定することができる。
さらに、このパック電池は、プリント基板５を定位置に
連結しているホルダー４を樹脂成形部１にインサート成
形して固定することができる。Further, the battery pack according to claim 2 of the present invention has a battery 2 having a safety valve 21 that opens when the internal pressure of the battery 2 becomes higher than a set pressure, and the battery 2 is fixed at a fixed position. And a plastic resin molding part 1 made of plastic that insert-molds the holder 4 and the battery 2 to fix the holder 4 to the battery 2. Holder 4
Has a resin intrusion prevention portion 9 for preventing intrusion of the synthetic resin forming the resin molding portion 1. In the battery pack, the resin intrusion prevention portion 9 forms a discharge path that connects the safety valve 21 to the outside. This battery pack has a convex electrode 2B of the battery 2.
It is possible to provide the safety valve 21 on the end surface of the electrode having the and to fix the holder 4 and the resin molding portion 1 to the end surface of the electrode.
Further, in this battery pack, the holder 4 that connects the printed circuit board 5 to a fixed position can be insert-molded and fixed to the resin molding portion 1.
【０００７】さらに、本発明のパック電池は、樹脂侵入
阻止部９に、温度保護素子６を配設することができる。
温度保護素子６は、ＰＴＣまたは温度ヒューズとするこ
とができる。さらに、パック電池は、電池２の表面を樹
脂侵入阻止部９に露出させて、樹脂侵入阻止部９に配設
される温度保護素子６を電池２に接近させることができ
る。Further, in the battery pack of the present invention, the temperature protection element 6 can be arranged in the resin intrusion prevention section 9.
The temperature protection element 6 can be a PTC or a thermal fuse. Furthermore, in the battery pack, the surface of the battery 2 can be exposed to the resin intrusion prevention part 9 so that the temperature protection element 6 arranged in the resin intrusion prevention part 9 can be brought close to the battery 2.
【０００８】本発明のパック電池の製造方法は、電池２
の内圧が設定圧力よりも高くなると開弁する安全弁２１
を有する電池２を金型１０の成形室１１に仮り止めし、
金型１０の成形室１１でもって、電池２の安全弁２１を
設けている端面に樹脂成形部１を成形する。さらに、本
発明の製造方法は、電池２を仮り止めしている成形室１
０で樹脂成形部１を成形するときに、樹脂成形部１を成
形する溶融状態の合成樹脂の侵入を阻止する樹脂侵入阻
止部９を設けて、この樹脂侵入阻止部９で安全弁２１を
外部に連通する排出経路を形成する。The method of manufacturing a battery pack according to the present invention includes a battery 2
Safety valve 21 that opens when the internal pressure of the valve becomes higher than the set pressure
Temporarily hold the battery 2 having the following in the molding chamber 11 of the mold 10,
In the molding chamber 11 of the mold 10, the resin molding portion 1 is molded on the end surface of the battery 2 where the safety valve 21 is provided. Furthermore, the manufacturing method according to the present invention is applied to the molding chamber 1 in which the battery 2 is temporarily fixed.
When the resin molding part 1 is molded with 0, a resin intrusion prevention part 9 for preventing intrusion of a synthetic resin in a molten state for molding the resin molding part 1 is provided, and the resin invasion prevention part 9 causes the safety valve 21 to be exposed to the outside. A communicating discharge path is formed.
【０００９】さらに、本発明の請求項９の製造方法は、
樹脂成形部１を成形する成形室１１に、電池２に加え
て、樹脂成形部１を成形する溶融状態の合成樹脂の侵入
を阻止する樹脂侵入阻止部９を有するホルダー４を仮り
止めして樹脂成形部１を成形し、樹脂侵入阻止部９で安
全弁２１を外部に連通する排出経路を形成する。さら
に、この製造方法は、ホルダー４の樹脂侵入阻止部９に
温度保護素子６を配設してホルダー４を金型１０の成形
室１１に仮り止めし、金型１０の成形室１１に溶融状態
の合成樹脂を注入して、樹脂成形部１を成形することが
できる。Further, the manufacturing method of claim 9 of the present invention is
In addition to the battery 2, a holder 4 having a resin intrusion prevention portion 9 for preventing intrusion of a molten synthetic resin for molding the resin molding portion 1 is temporarily fixed to a molding chamber 11 for molding the resin molding portion 1 by resin. The molding portion 1 is molded, and the resin intrusion prevention portion 9 forms a discharge path for communicating the safety valve 21 to the outside. Further, according to this manufacturing method, the temperature protection element 6 is provided in the resin intrusion prevention portion 9 of the holder 4, and the holder 4 is temporarily fixed to the molding chamber 11 of the mold 10 and is melted in the molding chamber 11 of the mold 10. The resin molding part 1 can be molded by injecting the synthetic resin of.
【００１０】[0010]
【発明の実施の形態】以下、本発明の実施例を図面に基
づいて説明する。ただし、以下に示す実施例は、本発明
の技術思想を具体化するためのパック電池とその製造方
法を例示するものであって、本発明はパック電池とその
製造方法を以下のものに特定しない。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. However, the examples described below exemplify the battery pack and its manufacturing method for embodying the technical idea of the present invention, and the present invention does not specify the battery pack and its manufacturing method as follows. .
【００１１】さらに、この明細書は、特許請求の範囲を
理解しやすいように、実施例に示される部材に対応する
番号を、「特許請求の範囲の欄」、および「課題を解決
するための手段の欄」に示される部材に付記している。
ただ、特許請求の範囲に示される部材を、実施例の部材
に特定するものでは決してない。Further, in this specification, in order to facilitate understanding of the claims, the numbers corresponding to the members shown in the embodiments are referred to as "the claims column" and "to solve the problems. It is added to the members shown in "Means column".
However, the members shown in the claims are not limited to the members of the embodiment.
【００１２】図２ないし図６と図１１に示すパック電池
は、電池２の周縁部に樹脂成形部１を成形して固定して
いる。図２ないし図６のパック電池は、電池２の凸部電
極２Ｂを設けている電極端面に樹脂成形部１を固定して
おり、図１１のパック電池は、電極端面を含む３辺に樹
脂成形部１を固定している。樹脂成形部１は、図７と図
８、及び図１２ないし図１４に示すように、ホルダー４
と温度保護素子６をインサート成形して固定している。
図７、図８、図１２、及び図１３は、樹脂成形部１に内
蔵されるホルダー４をわかりやすくするために、樹脂成
形部１を成形していないパック電池を示しており、とく
に、図８と図１３は、パーツを分解した斜視図を示して
いる。In the battery pack shown in FIGS. 2 to 6 and 11, the resin molding portion 1 is molded and fixed to the peripheral portion of the battery 2. The battery pack of FIGS. 2 to 6 has the resin molding portion 1 fixed to the electrode end surface where the convex electrode 2B of the battery 2 is provided, and the battery pack of FIG. 11 has resin molding on three sides including the electrode end surface. The part 1 is fixed. As shown in FIGS. 7 and 8 and FIGS. 12 to 14, the resin molding portion 1 includes a holder 4
The temperature protection element 6 is fixed by insert molding.
7, FIG. 12, FIG. 12, and FIG. 13 show a battery pack in which the resin molding portion 1 is not molded in order to make the holder 4 incorporated in the resin molding portion 1 easy to see. 8 and 13 show perspective views in which the parts are disassembled.
【００１３】これ等の図に示すパック電池は、電池２
と、この電池２に接続される温度保護素子６と、保護回
路を実装しているプリント基板５と、プリント基板５と
温度保護素子６を定位置に固定するホルダー４と、ホル
ダー４を電池２に連結している樹脂成形部１を備える。The battery pack shown in these figures is the battery 2
A temperature protection element 6 connected to the battery 2, a printed circuit board 5 on which a protection circuit is mounted, a holder 4 for fixing the printed circuit board 5 and the temperature protection element 6 in place, and the holder 4 for the battery 2 The resin molding part 1 connected to the.
【００１４】電池２は、リチウムイオン電池、ニッケル
−水素電池、ニッケル−カドミウム電池等の充電できる
二次電池である。図の電池２は、薄い角型電池で、外装
缶２Ａの両側を湾曲面として、外装缶２Ａの四隅のコー
ナー部を面取りした形状としている。薄い角型電池にリ
チウムイオン電池を使用すると、パック電池全体の容量
に対する充電容量を大きくできる特長がある。この電池
２は、凸部電極２Ｂを設けている電極端面に位置する封
口板２Ｃに安全弁２１を設けている。図の電池２は、封
口板２Ｃの中央部分に凸部電極２Ｂを設けて、一端部に
安全弁２１を設けている。電池は、凸部電極に安全弁を
内蔵させることもできる。安全弁２１は、電池２の内圧
が設定圧力よりも高くなるときに開弁する。開弁した安
全弁２１は、内部のガス等を排出して、外装缶２Ａの内
圧上昇を停止する。安全弁２１は、封口板２Ｃに開口し
た開口部に気密に密着している破壊膜２２である。破壊
膜２２は、電池２の内圧が設定圧力になると破壊され
て、安全弁２１を開弁する。破壊膜２２は、設定圧力で
破壊されるように、金属箔、金属箔とプラスチックフィ
ルムの積層膜、プラスチックフィルム等である。安全弁
には、破壊膜に変わって、外装缶の一部を薄く加工して
破壊されやすくする構造も使用できる。さらに、凸部電
極に内蔵される安全弁は、図１６に示すように、弾性体
２７で弁体２８を弁座２９に押圧する構造のものも使用
できる。この安全弁２１は、内圧で弁体２８が押されて
開弁し、排出孔３０からガス等を排出する。The battery 2 is a rechargeable secondary battery such as a lithium ion battery, a nickel-hydrogen battery, a nickel-cadmium battery or the like. The battery 2 in the figure is a thin prismatic battery, and has a shape in which both sides of the outer can 2A have curved surfaces and four corners of the outer can 2A are chamfered. Using a lithium-ion battery for the thin prismatic battery has the feature that the charging capacity relative to the capacity of the entire battery pack can be increased. In this battery 2, a safety valve 21 is provided on a sealing plate 2C located on the electrode end surface on which the convex electrode 2B is provided. In the battery 2 shown in the figure, the convex electrode 2B is provided at the center of the sealing plate 2C, and the safety valve 21 is provided at one end. The battery may have a safety valve built in the convex electrode. The safety valve 21 opens when the internal pressure of the battery 2 becomes higher than the set pressure. The opened safety valve 21 discharges internal gas and the like to stop the rise of the internal pressure of the outer can 2A. The safety valve 21 is a rupture film 22 that is airtightly adhered to the opening of the sealing plate 2C. The breaking film 22 is broken when the internal pressure of the battery 2 reaches the set pressure, and the safety valve 21 is opened. The breaking film 22 is a metal foil, a laminated film of a metal foil and a plastic film, a plastic film, or the like so as to be broken at a set pressure. Instead of a rupture film, the safety valve may have a structure in which a part of the outer can is thinly processed to make it easier to break. Further, as the safety valve built in the convex electrode, as shown in FIG. 16, one having a structure in which the valve body 28 is pressed against the valve seat 29 by the elastic body 27 can be used. The safety valve 21 opens when the valve body 28 is pushed by the internal pressure and discharges gas or the like from the discharge hole 30.
【００１５】プリント基板５は、電池２の保護回路を実
現する電子部品を実装している。この図のパック電池
は、保護回路をプリント基板５に実装するが、保護回路
を小さなＩＣとして、樹脂成形部に配設することもでき
る。このパック電池は、プリント基板を省略できる。さ
らに、図４と図１１のパック電池は、プリント基板５に
出力端子３を固定している。The printed circuit board 5 is mounted with electronic parts for realizing a protection circuit for the battery 2. In the battery pack shown in this figure, the protection circuit is mounted on the printed circuit board 5, but the protection circuit may be provided as a small IC in the resin molding portion. This battery pack can omit the printed circuit board. Furthermore, in the battery packs of FIGS. 4 and 11, the output terminal 3 is fixed to the printed circuit board 5.
【００１６】パック電池は、温度保護素子６とプリント
基板５を金型の正確な位置に仮り止めして樹脂成形部１
の定位置にインサート成形して固定するためのホルダー
４を備える。ホルダー４は、樹脂成形部１とは別にプラ
スチックで成形される。このホルダー４は、電池２と共
に樹脂成形部１にインサート成形して固定される。すな
わち、プラスチック製の樹脂成形部１を成形する金型に
ホルダー４と電池２を仮り止めし、金型の成形室に溶融
状態の合成樹脂を注入して樹脂成形部１が成形される。
成形室に仮り止されたホルダー４と電池２は、一部を樹
脂成形部１に埋設して固定される。In the battery pack, the temperature protection element 6 and the printed circuit board 5 are temporarily fixed to an accurate position of the mold and the resin molding part 1 is provided.
The holder 4 for insert molding and fixing is provided at a fixed position. The holder 4 is molded of plastic separately from the resin molding part 1. The holder 4 is insert-molded and fixed to the resin molding portion 1 together with the battery 2. That is, the holder 4 and the battery 2 are temporarily fixed to a mold for molding the plastic resin molding part 1, and the molten synthetic resin is injected into the molding chamber of the mold to mold the resin molding part 1.
The holder 4 and the battery 2 temporarily fixed in the molding chamber are partially embedded in the resin molding portion 1 and fixed.
【００１７】図のパック電池は、プリント基板５と温度
保護素子６を定位置に保持する状態で、ホルダー４を樹
脂成形部１にインサート成形している。パック電池は、
ホルダー４または樹脂成形部１に、樹脂成形部１を成形
する合成樹脂の侵入を阻止する樹脂侵入阻止部９を設け
ている。樹脂侵入阻止部９は、安全弁２１を樹脂成形部
１の外部に連通する排出経路を形成している。この排出
経路は、開弁した安全弁２１から排出されるガスや電解
液、さらには電極板やセパレータ等の内容物の破片を外
部に排出する。図７と図８のパック電池は、ホルダー４
に樹脂侵入阻止部９を設けている。この樹脂侵入阻止部
９は、一端（図において右端）を開口して、安全弁２１
の開口部を外部に連通している。樹脂侵入阻止部９は、
必ずしもホルダー４に設ける必要はない。図１１に示す
ように、樹脂成形部１に樹脂侵入阻止部９を設けること
もできる。このパック電池は、樹脂成形部１の横（図に
おいて上面）に開口して安全弁２１の開口部を外部に連
通する。In the battery pack shown in the figure, the holder 4 is insert-molded in the resin molding portion 1 with the printed circuit board 5 and the temperature protection element 6 being held in place. The battery pack is
The holder 4 or the resin molding portion 1 is provided with a resin intrusion prevention portion 9 that prevents intrusion of the synthetic resin that molds the resin molding portion 1. The resin intrusion prevention portion 9 forms a discharge path that connects the safety valve 21 to the outside of the resin molding portion 1. This discharge path discharges gas and electrolyte discharged from the opened safety valve 21 and further fragments of contents such as electrode plates and separators to the outside. The battery pack shown in FIGS. 7 and 8 has a holder 4
A resin invasion preventing portion 9 is provided on the. The resin invasion preventing portion 9 has one end (the right end in the drawing) opened, and the safety valve 21
The opening of is communicated with the outside. The resin intrusion prevention section 9
It is not always necessary to provide the holder 4. As shown in FIG. 11, the resin molding part 1 may be provided with a resin intrusion prevention part 9. The battery pack has an opening beside the resin molding portion 1 (upper surface in the drawing) so that the opening portion of the safety valve 21 communicates with the outside.
【００１８】樹脂侵入阻止部９は、図７と図８に示すよ
うに、温度保護素子６を配設することもできる。温度保
護素子６は、電池２と直列に接続されて、電池２が設定
温度よりも高くなると電流を遮断する素子で、ＰＴＣや
温度ヒューズである。温度保護素子６は、必ずしも安全
弁２１の開口部を外部に連通する樹脂侵入阻止部９に配
設する必要はない。図１１のパック電池は、図１４に示
すように、ふたつの樹脂侵入阻止部９を設けて、一方の
樹脂侵入阻止部９で安全弁２１を外部に連通する排出経
路を形成し、他方の樹脂侵入阻止部９に温度保護素子６
を配設している。安全弁２１を外部に連通する樹脂侵入
阻止部９は樹脂成形部１に設けて、温度保護素子６を配
設するための樹脂侵入阻止部９はホルダー４に設けてい
る。ふたつの樹脂侵入阻止部９を設けるパック電池は、
温度保護素子６を配設する樹脂侵入阻止部９を必ずしも
外部に連通する必要はない。As shown in FIGS. 7 and 8, the resin intrusion prevention section 9 may be provided with the temperature protection element 6. The temperature protection element 6 is an element that is connected in series with the battery 2 and interrupts current when the battery 2 becomes higher than a set temperature, and is a PTC or a thermal fuse. The temperature protection element 6 does not necessarily have to be arranged in the resin intrusion prevention portion 9 that communicates the opening of the safety valve 21 with the outside. As shown in FIG. 14, the battery pack of FIG. 11 is provided with two resin intrusion prevention parts 9 and one of the resin intrusion prevention parts 9 forms a discharge path for communicating the safety valve 21 to the outside, and the other resin intrusion prevention part 9 is formed. The temperature protection element 6 is provided in the blocking unit 9.
Are installed. The resin intrusion prevention part 9 for communicating the safety valve 21 to the outside is provided in the resin molding part 1, and the resin intrusion prevention part 9 for disposing the temperature protection element 6 is provided in the holder 4. The battery pack provided with the two resin intrusion prevention portions 9 is
The resin intrusion prevention portion 9 in which the temperature protection element 6 is arranged does not necessarily need to be communicated with the outside.
【００１９】図７と図８のホルダー４は、電池２の電極
端面に接触するコ字状の周壁４Ａと、周壁４Ａの開口部
を閉塞する樹脂注入阻止壁４Ｂで樹脂侵入阻止部９を形
成している。この樹脂侵入阻止部９は、図７と図８にお
いて、右端を開口して、ここから安全弁２１を通過して
外部に排出されるガス等を排出させる。この樹脂侵入阻
止部９は、電池２との対向面を開口しているが、この開
口部を電池２で閉塞している。開口部を電池２で閉塞す
るために、周壁４Ａは電池２の端面に隙間なく密着する
形状、いいかえると電池２の端面に沿う形状に成形され
る。開口部を電池２で閉塞する樹脂侵入阻止部９は、こ
こに配設される温度保護素子６を電池２の表面に接近で
きる。また、温度保護素子６と電池２との間に温度を遮
断するものがない。このため、温度保護素子６は、電池
２の異常な温度上昇を速やかに検出して電流を遮断でき
る。In the holder 4 shown in FIGS. 7 and 8, a resin intrusion prevention portion 9 is formed by a U-shaped peripheral wall 4A that contacts the electrode end surface of the battery 2 and a resin injection prevention wall 4B that closes the opening of the peripheral wall 4A. is doing. 7 and 8, the resin invasion prevention portion 9 has an opening at the right end, and discharges the gas or the like that passes through the safety valve 21 and is discharged to the outside. The resin intrusion prevention portion 9 has an opening on the surface facing the battery 2, but the opening is closed by the battery 2. In order to close the opening with the battery 2, the peripheral wall 4A is shaped so as to be in close contact with the end surface of the battery 2 without any gap, in other words, to have a shape along the end surface of the battery 2. The resin intrusion prevention portion 9 that closes the opening portion with the battery 2 allows the temperature protection element 6 disposed therein to approach the surface of the battery 2. Further, there is nothing that shuts off the temperature between the temperature protection element 6 and the battery 2. Therefore, the temperature protection element 6 can quickly detect an abnormal temperature rise of the battery 2 and cut off the current.
【００２０】図７と図８のホルダー４の樹脂侵入阻止部
９に配設される温度保護素子６は、一方のリード６Ｂを
凸部電極２Ｂに半田付けして連結する。さらに、温度保
護素子６の他方のリード６Ａは、プリント基板５に接続
するために、樹脂侵入阻止部９の右端の開口部から引き
出されている。樹脂侵入阻止部９の外部に引き出された
リード６Ａは、プリント基板５の一端に接続されたリー
ド５Ａにスポット溶接して接続される。さらに、プリン
ト基板５は、反対側の端部を電極リード８を介して電池
２に連結している。プリント基板５は、他端に接続され
たリード５Ｂに電極リード８をスポット溶接している。
したがって、このプリント基板５は、電極リード８と温
度保護素子６で両端を電池２に連結している。プリント
基板５と電池２の間にホルダー４が配設されるので、ホ
ルダー４も電池２の定位置に配設される。ホルダー４
は、プリント基板５と電池２との間に挟着されて、プリ
ント基板５を電池２の定位置に配設させる。The temperature protection element 6 arranged in the resin intrusion prevention portion 9 of the holder 4 of FIGS. 7 and 8 is connected by soldering one lead 6B to the convex electrode 2B. Further, the other lead 6A of the temperature protection element 6 is drawn out from the opening at the right end of the resin intrusion prevention portion 9 in order to connect to the printed circuit board 5. The lead 6A drawn out of the resin intrusion prevention portion 9 is spot-welded and connected to the lead 5A connected to one end of the printed board 5. Furthermore, the printed circuit board 5 has the opposite end connected to the battery 2 via the electrode lead 8. The printed circuit board 5 has an electrode lead 8 spot-welded to a lead 5B connected to the other end.
Therefore, both ends of the printed circuit board 5 are connected to the battery 2 by the electrode lead 8 and the temperature protection element 6. Since the holder 4 is arranged between the printed circuit board 5 and the battery 2, the holder 4 is also arranged at a fixed position of the battery 2. Holder 4
Is sandwiched between the printed circuit board 5 and the battery 2 to dispose the printed circuit board 5 at a fixed position on the battery 2.
【００２１】さらに、図８のホルダー４は、プリント基
板５に対向する開口縁に保持凸部２３を設けている。プ
リント基板５は、この保持凸部２３に対向する位置を切
欠して嵌入部２４を設けている。プリント基板５とホル
ダー４は、保持凸部２３を嵌入部２４に嵌入して所定の
位置で連結される。さらに、図７と図８に示すプリント
基板５は、ホルダー４とプリント基板５を樹脂成形部１
に埋設して固定するために、溶融樹脂を侵入させる樹脂
注入口１９を開口している。図の樹脂注入口１９は、プ
リント基板５の端部に開口しており、溶融樹脂をプリン
ト基板５の裏面にも注入させる。Further, the holder 4 of FIG. 8 is provided with a holding convex portion 23 at the opening edge facing the printed circuit board 5. The printed board 5 is provided with a fitting portion 24 by cutting out a position facing the holding convex portion 23. The printed board 5 and the holder 4 are connected at a predetermined position by fitting the holding convex portion 23 into the fitting portion 24. Further, in the printed circuit board 5 shown in FIGS. 7 and 8, the holder 4 and the printed circuit board 5 are mounted on the resin molding part 1.
A resin injection port 19 through which the molten resin is introduced is opened in order to bury and fix the resin. The resin injection port 19 shown in the drawing is opened at the end of the printed circuit board 5, and the molten resin is also injected into the back surface of the printed circuit board 5.
【００２２】図１１のパック電池のホルダー４は、図１
３に示すように、周壁４Ａの開口部を樹脂注入阻止壁４
Ｂで閉塞して樹脂侵入阻止部９を形成している。この樹
脂侵入阻止部９は、電池２との対向面を開口している
が、この開口部を電池２で閉塞している。開口部を電池
２で閉塞するために、周壁４Ａは電池２の側面に隙間な
く密着する形状、いいかえると電池２の側面に沿う形状
に成形される。この樹脂侵入阻止部９も、ここに配設さ
れる温度保護素子６を電池２の表面に接近できるので、
温度保護素子６で電池２の異常な温度上昇を速やかに検
出して電流を遮断できる。The battery pack holder 4 shown in FIG.
As shown in FIG.
The resin is blocked by B to form the resin intrusion prevention portion 9. The resin intrusion prevention portion 9 has an opening on the surface facing the battery 2, but the opening is closed by the battery 2. In order to close the opening with the battery 2, the peripheral wall 4A is formed into a shape that closely adheres to the side surface of the battery 2 without any gap, in other words, a shape that extends along the side surface of the battery 2. Since this resin invasion preventing portion 9 can also bring the temperature protection element 6 disposed therein close to the surface of the battery 2,
The temperature protection element 6 can promptly detect an abnormal temperature rise of the battery 2 to interrupt the current.
【００２３】さらに、このホルダー４は、図１４に示す
ように、温度保護素子６を収納する樹脂成形部１の内面
に凸部１６を設けている。温度保護素子６は、この凸部
１６に局部的に接触して、樹脂侵入阻止部９に配設され
る。この構造で樹脂侵入阻止部９に配設される温度保護
素子６は、電池温度が上昇したときに極めて速やかに電
流を遮断できる。温度保護素子６が樹脂注入阻止壁４Ｂ
に局部的に接触して、樹脂侵入阻止部９への熱伝導を少
なくできるからである。Further, as shown in FIG. 14, the holder 4 is provided with a convex portion 16 on the inner surface of the resin molding portion 1 for accommodating the temperature protection element 6. The temperature protection element 6 is provided in the resin intrusion prevention portion 9 by locally contacting the convex portion 16. With this structure, the temperature protection element 6 arranged in the resin intrusion prevention portion 9 can interrupt the current very quickly when the battery temperature rises. The temperature protection element 6 is a resin injection blocking wall 4B.
This is because the heat conduction to the resin invasion blocking portion 9 can be reduced by locally contacting the resin.
【００２４】さらに、図１３のホルダー４は、樹脂注入
阻止壁４Ｂの一部に、温度保護素子６のリード６Ａを接
続するための接続窓１７を開口している。この接続窓１
７は、プリント基板５を密着して閉塞される。接続窓１
７を閉塞するプリント基板５は、樹脂侵入阻止部９の内
部に露出する。このプリント基板５の露出部は、温度保
護素子６の一方のリード６Ａを半田付けして連結する。
さらに、温度保護素子６の他方のリード６Ｂを電池２に
接続するために、周壁４Ａにも貫通孔１８を開口してい
る。この貫通孔１８は、金属板のリード６Ｂを隙間なく
挿通できるスリット状で、ここにリード６Ｂを挿通して
閉塞される。貫通孔１８を通過して樹脂侵入阻止部９の
外部に引き出されたリード６Ｂは、電極リード７を介し
て電池２の凸電極２Ｂにスポット溶接して連結される。Further, in the holder 4 of FIG. 13, a connection window 17 for connecting the lead 6A of the temperature protection element 6 is opened in a part of the resin injection blocking wall 4B. This connection window 1
The printed circuit board 5 is in close contact with and closed. Connection window 1
The printed circuit board 5 that closes 7 is exposed inside the resin intrusion prevention portion 9. The exposed portion of the printed circuit board 5 is connected to one lead 6A of the temperature protection element 6 by soldering.
Further, in order to connect the other lead 6B of the temperature protection element 6 to the battery 2, a through hole 18 is also opened in the peripheral wall 4A. The through hole 18 has a slit shape that allows the lead 6B of the metal plate to be inserted without a gap, and the lead 6B is inserted into the through hole 18 to be closed. The lead 6 </ b> B that has passed through the through hole 18 and is drawn out of the resin intrusion prevention portion 9 is spot-welded and connected to the convex electrode 2 </ b> B of the battery 2 via the electrode lead 7.
【００２５】さらに、図１２と図１３のホルダー４は、
樹脂侵入阻止部９を構成する周壁４Ａと同じ高さで、プ
リント基板５を支持する支持壁４Ｃを一体的に成形して
いる。支持壁４Ｃは、プリント基板５の両側を支持する
位置に設けられる。この支持壁４Ｃは、プリント基板５
を樹脂成形部１に埋設して固定するために、中間に樹脂
注入口１９を開口している。樹脂注入口１９は、プリン
ト基板５の両側に開口して、溶融樹脂をプリント基板５
の裏面にも注入させる。さらに、図のホルダー４は、図
１３において左端部に、電極リード８を保持するリード
ガイド２０を設けている。このリードガイド２０は、プ
リント基板５と電池２に連結している電極リード８を保
持し、電極リード８を介してプリント基板５をホルダー
４の定位置に保持する。図のプリント基板５は、反対側
の端部を、温度保護素子６を介して電池２に連結してい
る。このプリント基板５は、電極リード８と温度保護素
子６で両端を電池２に連結している。プリント基板５と
電池２の間にホルダー４が配設されるので、ホルダー４
も電池２の定位置に配設される。ホルダー４は、プリン
ト基板５と電池２との間に挟着されて、プリント基板５
を電池２の定位置に配設される。Further, the holder 4 shown in FIGS. 12 and 13 is
A support wall 4C that supports the printed circuit board 5 is integrally formed at the same height as the peripheral wall 4A that constitutes the resin intrusion prevention portion 9. The support wall 4C is provided at a position that supports both sides of the printed circuit board 5. This support wall 4C is a printed circuit board 5
A resin injection port 19 is opened in the middle so as to be embedded and fixed in the resin molding portion 1. The resin injection port 19 is opened on both sides of the printed circuit board 5 so that the molten resin is filled with the printed circuit board 5.
Also infuse on the back side of. Further, the holder 4 in the drawing is provided with a lead guide 20 for holding the electrode lead 8 at the left end portion in FIG. The lead guide 20 holds the electrode lead 8 connected to the printed circuit board 5 and the battery 2, and holds the printed circuit board 5 in a fixed position of the holder 4 via the electrode lead 8. The printed circuit board 5 in the figure has the opposite end connected to the battery 2 via the temperature protection element 6. Both ends of the printed circuit board 5 are connected to the battery 2 by an electrode lead 8 and a temperature protection element 6. Since the holder 4 is disposed between the printed circuit board 5 and the battery 2, the holder 4
Is also arranged at a fixed position of the battery 2. The holder 4 is sandwiched between the printed circuit board 5 and the battery 2, and
Is arranged at a fixed position of the battery 2.
【００２６】樹脂成形部１は、合成樹脂を成形する工程
で、ホルダー４と電池２をインサート成形する。ホルダ
ー４には温度保護素子６とプリント基板５を連結してい
るので、樹脂成形部１は、ホルダー４と温度保護素子６
とプリント基板５と電池２を一体的に定位置に連結す
る。以上のパック電池は、電池２の全体を樹脂成形部１
に埋設してインサートしない。図２ないし図６のパック
電池は、電池２の端面に樹脂成形部１を成形している。
このパック電池は、外形を小さくできる特長がある。た
だ、パック電池は、図７に示すように電池２の３辺に樹
脂成形部１を成形することもできる。さらに、パック電
池は、電池の一部ないしほぼ全体を樹脂成形部に埋設す
るようにインサートして、しっかりと強靭な構造のパッ
ク電池とすることもできる。The resin molding portion 1 insert-molds the holder 4 and the battery 2 in the step of molding a synthetic resin. Since the temperature protection element 6 and the printed circuit board 5 are connected to the holder 4, the resin molding part 1 is provided with the holder 4 and the temperature protection element 6.
And the printed circuit board 5 and the battery 2 are integrally connected in a fixed position. In the above-mentioned battery pack, the entire battery 2 is made up of the resin molding part 1
Do not insert by embedding in. In the battery pack of FIGS. 2 to 6, the resin molding portion 1 is molded on the end surface of the battery 2.
This battery pack has a feature that the outer shape can be reduced. However, in the battery pack, the resin molding portion 1 can be molded on three sides of the battery 2 as shown in FIG. Furthermore, the battery pack may be inserted so that a part or almost all of the battery is embedded in the resin molding portion to form a battery pack having a solid and tough structure.
【００２７】樹脂成形部１を成形する合成樹脂は、ポリ
アミドあるいはポリウレタンを使用する。これらの合成
樹脂は、軟化温度が低く、しかも溶融時の粘度も低いの
で、一般の合成樹脂に比較して、低温、低圧で成形でき
る。このように、低温、低圧で成形される樹脂成形部１
は、成形に要する時間を短縮できると共に、樹脂成形時
における熱や射出圧による電子部品等への悪影響を低減
できる特長がある。とくに、樹脂侵入阻止部９に温度保
護素子６を配設するパック電池においては、溶融樹脂に
よる温度保護素子６への熱の影響をさらに少なくでき
る。Polyamide or polyurethane is used as the synthetic resin for molding the resin molding portion 1. Since these synthetic resins have a low softening temperature and a low viscosity at the time of melting, they can be molded at a lower temperature and a lower pressure than general synthetic resins. Thus, the resin molding part 1 molded at low temperature and low pressure
Has the advantages that the time required for molding can be shortened and that adverse effects on the electronic parts and the like due to heat and injection pressure during resin molding can be reduced. Particularly, in a battery pack in which the temperature protection element 6 is arranged in the resin intrusion prevention portion 9, the influence of heat on the temperature protection element 6 due to the molten resin can be further reduced.
【００２８】以上のパック電池は、以下のようにして製
造される。
(1) 温度保護素子６と電極リード８でプリント基板５
を電池２に接続して、温度保護素子６とプリント基板５
とホルダー４を電池２の定位置に配設する。この状態
で、ホルダー４は、プリント基板５と電池２の間にあっ
て、プリント基板５と電池２は正確な相対位置に連結さ
れる。以上の工程で、プリント基板５とホルダー４と温
度保護素子６と電池２とが一体的に連結されて電池組立
１５となる。The above battery pack is manufactured as follows. (1) Printed circuit board 5 with temperature protection element 6 and electrode lead 8
Is connected to the battery 2, and the temperature protection element 6 and the printed circuit board 5 are connected.
The holder 4 is arranged at a fixed position of the battery 2. In this state, the holder 4 is located between the printed circuit board 5 and the battery 2, and the printed circuit board 5 and the battery 2 are connected to each other at an accurate relative position. Through the above steps, the printed circuit board 5, the holder 4, the temperature protection element 6, and the battery 2 are integrally connected to form the battery assembly 15.
【００２９】(2) 電池組立１５を、金型１０の成形室
１１にセットする。図２ないし図６に示すパック電池
は、図９と図１０に示す構造の金型１０で樹脂成形部１
を成形する。さらに、図１１に示すパック電池は、図１
４と図１５に示す金型１０で樹脂成形部１を成形する。
成形室１１に電池組立１５をセットした後、金型１０を
型締めする。型締めされた金型１０は、樹脂成形部１を
成形するための成形室１１が形成される。この成形室１
１に、加熱されて溶融された合成樹脂が注入されて樹脂
成形部１を成形する。溶融された合成樹脂は、金型１０
に開口された注液孔１２から注入される。注液孔１２
は、成形室１１に連通して設けられている。(2) The battery assembly 15 is set in the molding chamber 11 of the mold 10. The battery pack shown in FIGS. 2 to 6 has a resin molding part 1 formed by a mold 10 having a structure shown in FIGS. 9 and 10.
To mold. Furthermore, the battery pack shown in FIG.
The resin molding part 1 is molded with the mold 10 shown in FIG.
After setting the battery assembly 15 in the molding chamber 11, the mold 10 is clamped. A mold chamber 11 for molding the resin molding part 1 is formed in the mold 10 that has been clamped. This molding room 1
1, the synthetic resin which is heated and melted is injected to mold the resin molding portion 1. The molten synthetic resin is the mold 10
It is injected from a liquid injection hole 12 opened in the. Injection hole 12
Are provided in communication with the molding chamber 11.
【００３０】さらに、図９と図１０に示す金型１０は、
電池組立１５を定位置に仮り止めする位置決凸部１３を
有する。位置決凸部１３は、ホルダー４またはプリント
基板５の表面に当接して、電池組立１５を正確な位置に
仮り止めする。図１０において上下に位置する位置決凸
部１３は、ホルダー４の表面を押圧して定位置に仮り止
めする。これらの位置決凸部１３は、ホルダー４を上下
で挟着して上下の位置ずれを阻止する。さらに、ホルダ
ー４は、４隅の角隅を金型１０のコーナー部の内面に当
接させて、左右方向のずれを阻止する。さらにまた、図
９の金型１０は、プリント基板５の出力端子３の表面を
位置決凸部１３で押圧すると共に、電池２の底を金型１
０の成形室１１の内面に当接させて、電池組立１５の縦
方向の位置ずれを阻止する。さらに、出力端子３の表面
を押圧する位置決凸部１３は、成形された樹脂成形部１
から出力端子３を外部に表出させる。Further, the mold 10 shown in FIGS. 9 and 10 is
It has a positioning protrusion 13 for temporarily fixing the battery assembly 15 in place. The positioning protrusion 13 abuts on the surface of the holder 4 or the printed circuit board 5 to temporarily fix the battery assembly 15 at an accurate position. In FIG. 10, the positioning protrusions 13 located above and below press the surface of the holder 4 and temporarily fix it in place. These positioning projections 13 sandwich the holder 4 between the upper and lower portions and prevent the vertical displacement. Further, the holder 4 brings the four corners into contact with the inner surfaces of the corners of the mold 10 to prevent the lateral displacement. Furthermore, in the mold 10 of FIG. 9, the surface of the output terminal 3 of the printed board 5 is pressed by the positioning protrusion 13 and the bottom of the battery 2 is fixed to the mold 1.
It is brought into contact with the inner surface of the molding chamber 11 of 0 to prevent the battery assembly 15 from being displaced in the vertical direction. Furthermore, the positioning protrusion 13 that presses the surface of the output terminal 3 is formed by the molded resin molding portion 1.
To output the output terminal 3 to the outside.
【００３１】さらに、図９に示す金型１０は、溶融され
た合成樹脂が樹脂侵入阻止部９に侵入するのを防ぐ侵入
阻止凸部２５を有する。この侵入阻止凸部２５は、金型
１０を型締めした状態で、成形室１１にセットされた電
池組立１５の樹脂侵入阻止部９の開口部を閉塞する位置
に突出して設けられている。侵入阻止凸部２５で溶融樹
脂の侵入が阻止される樹脂侵入阻止部９は、安全弁２１
を確実に樹脂成形部１の外部に連通する。Further, the mold 10 shown in FIG. 9 has an intrusion prevention convex portion 25 for preventing the molten synthetic resin from invading the resin intrusion prevention portion 9. The intrusion prevention convex portion 25 is provided so as to protrude to a position that closes the opening of the resin intrusion prevention portion 9 of the battery assembly 15 set in the molding chamber 11 in a state where the mold 10 is clamped. The resin intrusion prevention portion 9 in which the intrusion of the molten resin is prevented by the intrusion prevention convex portion 25 is provided in the safety valve 21.
Is surely communicated with the outside of the resin molding portion 1.
【００３２】図１４と図１５に示す金型１０は、電池組
立１５を定位置に仮り止めする中央凸部１４と位置決凸
部１３を有する。中央凸部１４は、電池２の表側面と裏
側面とに当接して、電池２を上下の中央凸部１４で挟着
して電池２の上下方向の位置ずれを阻止する。位置決凸
部１３は、プリント基板５に設けられた出力端子３の表
面を押圧する。この金型１０は、プリント基板５の表面
が位置決凸部１３で押圧されると共に、電池２の反対側
の側面を成形室１１の内面に当接させて、電池組立１５
の前後方向の位置ずれを阻止する。さらに、出力端子３
の表面を押圧する位置決凸部１３は、成形された樹脂成
形部１から出力端子３を外部に表出させる。The mold 10 shown in FIGS. 14 and 15 has a central convex portion 14 and a positioning convex portion 13 for temporarily fixing the battery assembly 15 in place. The central convex portion 14 contacts the front side surface and the back side surface of the battery 2 to sandwich the battery 2 between the upper and lower central convex portions 14 and prevent the battery 2 from being displaced in the vertical direction. The positioning protrusion 13 presses the surface of the output terminal 3 provided on the printed circuit board 5. In this mold 10, the surface of the printed circuit board 5 is pressed by the positioning protrusions 13, and the side surface on the opposite side of the battery 2 is brought into contact with the inner surface of the molding chamber 11 so that the battery assembly 15
Prevents the positional displacement in the front-back direction. Furthermore, output terminal 3
The positioning protrusion 13 that presses the surface of the resin exposes the output terminal 3 from the molded resin molding portion 1 to the outside.
【００３３】さらに、図のホルダー４は、４隅の角隅４
Ｄを金型１０の成形室１１のコーナー部の内面に当接さ
せて、ホルダー４とプリント基板５の上下左右方向の位
置ずれを阻止する。このように、金型１０は、中央凸部
１４を電池２に当接させ、位置決凸部１３をプリント基
板５の表面に当接させ、さらに、ホルダー４の角隅４Ｄ
を金型１０の内面に当接させて、電池組立１５を定位置
に仮り止めする。Further, the holder 4 shown in the figure has four corners.
D is brought into contact with the inner surface of the corner portion of the molding chamber 11 of the die 10 to prevent the holder 4 and the printed circuit board 5 from being displaced in the vertical and horizontal directions. In this manner, in the mold 10, the central convex portion 14 is brought into contact with the battery 2, the positioning convex portion 13 is brought into contact with the surface of the printed circuit board 5, and further, the corner 4D of the holder 4 is provided.
Is brought into contact with the inner surface of the mold 10 to temporarily fix the battery assembly 15 in place.
【００３４】さらに、図１５に示す金型１０は、樹脂成
形部１に樹脂侵入阻止部９を形成する成形凸部２６を有
する。成形凸部２６は、金型１０の内面から突出して設
けている。成形凸部２６は、金型１０を型締めした状態
で、成形室１１にセットされる電池２の安全弁２１の開
口部を閉塞する位置に設けている。この成形凸部２６
は、成形室１１に溶融樹脂を注入するときに、安全弁２
１の開口部が樹脂で閉塞されるのを阻止し、安全弁２１
を樹脂成形部１の外部に連通する樹脂侵入阻止部９を形
成する。Further, the mold 10 shown in FIG. 15 has a molding convex portion 26 for forming the resin intrusion prevention portion 9 in the resin molding portion 1. The molding convex portion 26 is provided so as to project from the inner surface of the mold 10. The molding convex portion 26 is provided at a position that closes the opening of the safety valve 21 of the battery 2 set in the molding chamber 11 when the mold 10 is clamped. This molding convex portion 26
Is a safety valve 2 when the molten resin is injected into the molding chamber 11.
The opening of 1 is blocked by the resin, and the safety valve 21
A resin intrusion prevention portion 9 that communicates with the outside of the resin molding portion 1 is formed.
【００３５】(4) 成形室１１に加熱して溶融された合
成樹脂を圧入する。溶融合成樹脂は、図７と図１４に示
すように、成形室１１に侵入して樹脂侵入阻止部９には
侵入しない。成形室１１で成形された樹脂成形部１は、
プリント基板５とホルダー４と電池２を一体構造に連結
して固定する。樹脂侵入阻止部９には合成樹脂が注入さ
れず、安全弁２１は、樹脂侵入阻止部９でもって、樹脂
成形部１の外部に連通される。(4) The synthetic resin melted by heating is pressed into the molding chamber 11. As shown in FIGS. 7 and 14, the molten synthetic resin penetrates into the molding chamber 11 and does not penetrate into the resin invasion blocking portion 9. The resin molding part 1 molded in the molding chamber 11 is
The printed board 5, the holder 4, and the battery 2 are connected and fixed in an integrated structure. The synthetic resin is not injected into the resin intrusion prevention portion 9, and the safety valve 21 is communicated with the outside of the resin molding portion 1 by the resin intrusion prevention portion 9.
【００３６】(5) 以上の工程で、電池組立１５は、プ
リント基板５とホルダー４と電池２を樹脂成形部１にイ
ンサートして定位置に固定される。その後、樹脂成形部
１が成形された電池組立１５の表面をチューブで被覆し
て完成されたパック電池となる。チューブには熱収縮チ
ューブを使用する。熱収縮チューブは、樹脂成形部１が
成形された電池組立１５を入れた後、加熱、収縮して表
面に密着させる。(5) Through the above steps, the battery assembly 15 is fixed in place by inserting the printed board 5, the holder 4 and the battery 2 into the resin molding portion 1. Then, the surface of the battery assembly 15 in which the resin molding portion 1 is molded is covered with a tube to complete the battery pack. Use heat-shrink tubing. After the battery assembly 15 in which the resin molding portion 1 is molded is put in the heat shrinkable tube, the heat shrinkable tube is heated and shrunk to be brought into close contact with the surface.
【００３７】[0037]
【発明の効果】本発明のパック電池とその製造方法は、
電池等をインサート成形している樹脂成形部でもって、
安全弁が誤って破壊されるのを有効に防止し、樹脂成形
部で安全弁を保護しながら、しかも安全弁を正確に動作
させて電池の内圧上昇を確実に防止できる特長がある。
それは、本発明が、電池等をインサート成形している樹
脂成形部に合成樹脂の侵入を阻止する樹脂侵入阻止部を
設けると共に、この樹脂侵入阻止部で安全弁を樹脂成形
部の外部に連通する排出経路を形成して、開弁した安全
弁から排出されるガス等を外部に排出するようにしてい
るからである。The battery pack of the present invention and the manufacturing method thereof are as follows.
With a resin molding part that insert-molds batteries etc.,
The safety valve can be effectively prevented from being accidentally destroyed, and the safety valve can be protected by the resin molding part, and at the same time, the safety valve can be operated accurately to reliably prevent the internal pressure of the battery from rising.
According to the present invention, a resin intrusion preventing portion for preventing the intrusion of a synthetic resin is provided in a resin molding portion for insert molding of a battery or the like, and at the same time, the safety valve communicates with the outside of the resin molding portion by the resin intrusion prevention portion. This is because the path is formed and the gas discharged from the opened safety valve is discharged to the outside.
【図１】従来のパック電池の製造工程を示す斜視図FIG. 1 is a perspective view showing a manufacturing process of a conventional battery pack.
【図２】本発明の一実施例にかかるパック電池の平面図FIG. 2 is a plan view of a battery pack according to an embodiment of the present invention.
【図３】図２に示すパック電池の右側面図3 is a right side view of the battery pack shown in FIG.
【図４】図２に示すパック電池の正面図4 is a front view of the battery pack shown in FIG.
【図５】図４に示すパック電池のＢ−Ｂ線断面図5 is a cross-sectional view of the battery pack shown in FIG. 4 taken along the line BB.
【図６】図２に示すパック電池のＡ−Ａ線断面図6 is a sectional view of the battery pack shown in FIG. 2 taken along the line AA.
【図７】図２に示すパック電池の樹脂成形部を成形して
いない電池組立の拡大断面図FIG. 7 is an enlarged cross-sectional view of a battery assembly in which the resin molding portion of the battery pack shown in FIG. 2 is not molded.
【図８】図２に示すパック電池の樹脂成形部を成形して
いない電池組立の分解斜視図8 is an exploded perspective view of a battery assembly in which a resin molding portion of the battery pack shown in FIG. 2 is not molded.
【図９】図２に示すパック電池の樹脂成形部を成形する
金型の分解斜視図9 is an exploded perspective view of a mold for molding a resin molding part of the battery pack shown in FIG.
【図１０】図９に示す金型で樹脂成形部を成形する状態
を示す断面図10 is a cross-sectional view showing a state in which a resin molding portion is molded with the mold shown in FIG.
【図１１】本発明の他の実施例にかかるパック電池の平
面図FIG. 11 is a plan view of a battery pack according to another embodiment of the present invention.
【図１２】図１１に示すパック電池の樹脂成形部を成形
していない電池組立の斜視図FIG. 12 is a perspective view of a battery assembly in which the resin molding portion of the battery pack shown in FIG. 11 is not molded.
【図１３】図１２に示す電池組立の分解斜視図13 is an exploded perspective view of the battery assembly shown in FIG.
【図１４】図１１に示すパック電池の樹脂成形部を金型
で成形する状態を示す断面図14 is a cross-sectional view showing a state where the resin molding portion of the battery pack shown in FIG. 11 is molded with a mold.
【図１５】図１１に示すパック電池の樹脂成形部を成形
する金型の分解斜視図15 is an exploded perspective view of a mold for molding a resin molding portion of the battery pack shown in FIG.
【図１６】安全弁の他の一例を示す断面図FIG. 16 is a sectional view showing another example of the safety valve.
１…樹脂成形部
２…電池 ２Ａ…外装缶 ２
Ｂ…凸部電極
２Ｃ…封口板
３…出力端子
４…ホルダー ４Ａ…周壁 ４
Ｂ…樹脂注入阻止壁
４Ｃ…支持壁 ４Ｄ…角隅
５…プリント基板 ５Ａ…リード ５
Ｂ…リード
６…温度保護素子 ６Ａ…リード ６
Ｂ…リード
７…電極リード
８…電極リード
９…樹脂侵入阻止部
１０…金型
１１…成形室
１２…注液孔
１３…位置決凸部
１４…中央凸部
１５…電池組立
１６…凸部
１７…接続窓
１８…貫通孔
１９…樹脂注入口
２０…リードガイド
２１…安全弁
２２…破壊膜
２３…保持凸部
２４…嵌入溝
２５…侵入阻止凸部
２６…成形凸部
２７…弾性体
２８…弁体
２９…弁座
３０…排出孔1 ... Resin molding part 2 ... Battery 2A ... Exterior can 2
B: convex electrode 2C: sealing plate 3 ... output terminal 4 ... holder 4A ... peripheral wall 4
B ... Resin injection blocking wall 4C ... Supporting wall 4D ... Corner 5 ... Printed circuit board 5A ... Lead 5
B ... Lead 6 ... Temperature protection element 6A ... Lead 6
B ... Lead 7 ... Electrode lead 8 ... Electrode lead 9 ... Resin invasion blocking portion 10 ... Mold 11 ... Molding chamber 12 ... Liquid injection hole 13 ... Positioning convex portion 14 ... Central convex portion 15 ... Battery assembly 16 ... Convex portion 17 ... Connection window 18 ... Through hole 19 ... Resin injection port 20 ... Lead guide 21 ... Safety valve 22 ... Breakage film 23 ... Holding projection 24 ... Fitting groove 25 ... Intrusion prevention projection 26 ... Molding projection 27 ... Elastic body 28 ... Valve Body 29 ... Valve seat 30 ... Discharge hole
───────────────────────────────────────────────────── フロントページの続き (72)発明者 玉井 幹隆 大阪府守口市京阪本通２丁目５番５号 三 洋電機株式会社内 Ｆターム(参考） 5H040 AA33 AY04 AY08 DD10 DD26 JJ05 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Mikitaka Tamai 2-5-3 Keihan Hondori, Moriguchi City, Osaka Prefecture Within Yo Denki Co., Ltd. F-term (reference) 5H040 AA33 AY04 AY08 DD10 DD26 JJ05
Claims (10)
ると開弁する安全弁(21)を有する電池(2)と、この電池
(2)をインサート成形して成形されてなる樹脂成形部(1)
とを備えるパック電池であって、 樹脂成形部(1)が、樹脂成形部(1)を成形する合成樹脂の
侵入を阻止する樹脂侵入阻止部(9)を有すると共に、こ
の樹脂侵入阻止部(9)で安全弁(21)を樹脂成形部(1)の外
部に連通する排出経路を形成してなるパック電池。1. A battery (2) having a safety valve (21) which opens when the internal pressure of the battery (2) becomes higher than a set pressure, and this battery.
Resin molding part (1) formed by insert molding of (2)
In the battery pack including the resin molding part (1), the resin molding part (1) has a resin penetration blocking part (9) for blocking the penetration of the synthetic resin molding the resin molding part (1), and A battery pack in which a discharge passage is formed which connects the safety valve (21) to the outside of the resin molding portion (1) at 9).
ると開弁する安全弁(21)を有する電池(2)と、この電池
(2)の定位置に固定されるホルダー(4)と、ホルダー(4)
と電池(2)をインサート成形してホルダー(4)を電池(2)
に固定している樹脂成形部(1)とを備えるパック電池で
あって、 ホルダー(4)が、樹脂成形部(1)を成形する合成樹脂の侵
入を阻止する樹脂侵入阻止部(9)を有すると共に、この
樹脂侵入阻止部(9)で安全弁(21)を外部に連通する排出
経路を形成してなるパック電池。2. A battery (2) having a safety valve (21) which opens when the internal pressure of the battery (2) becomes higher than a set pressure, and this battery.
Holder (4) fixed in place in (2) and holder (4)
Insert the battery (2) and insert the holder (4) into the battery (2)
A battery pack comprising a resin molding part (1) fixed to a holder, and a holder (4) having a resin intrusion prevention part (9) for preventing the intrusion of the synthetic resin molding the resin molding part (1). A battery pack having the resin intrusion prevention part (9) and a discharge path communicating the safety valve (21) with the outside.
面に安全弁(21)を設けており、この電極端面にホルダー
(4)と樹脂成形部(1)を固定している請求項２に記載され
るパック電池。3. A battery (2) is provided with a safety valve (21) on an electrode end surface having a convex electrode (2B), and a holder is provided on this electrode end surface.
The battery pack according to claim 2, wherein the resin molding portion (1) and the resin molding portion (1) are fixed.
位置に連結しているホルダー(4)をインサート成形して
固定している請求項２に記載されるパック電池。4. The battery pack according to claim 2, wherein the resin molding part (1) insert-molds and fixes a holder (4) connecting the printed circuit board (5) in a fixed position.
を配設している請求項１または２に記載されるパック電
池。5. The temperature protection element (6) is provided on the resin intrusion prevention part (9).
The battery pack according to claim 1, wherein the battery pack is provided.
ヒューズである請求項５に記載されるパック電池。6. The battery pack according to claim 5, wherein the temperature protection device (6) is a PTC or a thermal fuse.
出すると共に、樹脂侵入阻止部(9)に配設される温度保
護素子(6)が電池(2)に接近している請求項５に記載され
るパック電池。7. The surface of the battery (2) is exposed to the resin intrusion prevention part (9), and the temperature protection element (6) arranged in the resin intrusion prevention part (9) approaches the battery (2). The battery pack according to claim 5, wherein
ると開弁する安全弁(21)を有する電池(2)を金型(10)の
成形室(11)に仮り止めし、金型(10)の成形室(11)でもっ
て、電池(2)の安全弁(21)を設けている端面に樹脂成形
部(1)を成形するパック電池の製造方法であって、 電池(2)を仮り止めしている成形室(11)で樹脂成形部(1)
を成形するときに、樹脂成形部(1)を成形する溶融状態
の合成樹脂の侵入を阻止する樹脂侵入阻止部(9)を設け
ると共に、この樹脂侵入阻止部(9)で安全弁(21)を外部
に連通する排出経路を形成するパック電池の製造方法。8. A mold (10) temporarily holds a battery (2) having a safety valve (21) that opens when the internal pressure of the battery (2) becomes higher than a preset pressure, A method for manufacturing a battery pack, in which a resin molding part (1) is molded on the end surface of the battery (2) provided with the safety valve (21) in the molding chamber (11) of (10), and the battery (2) is Resin molding part (1) in the molding chamber (11) temporarily fixed
At the time of molding the resin molding part (1), a resin intrusion prevention part (9) for preventing the intrusion of the molten synthetic resin for molding the resin molding part (1) is provided, and the safety valve (21) is provided at this resin intrusion prevention part (9). A manufacturing method of a battery pack, which forms a discharge path communicating with the outside.
ると開弁する安全弁(21)を有する電池(2)を金型(10)の
成形室(11)に仮り止めし、金型(10)の成形室(11)でもっ
て、電池(2)の安全弁(21)を設けている端面に樹脂成形
部(1)を成形するパック電池の製造方法であって、 樹脂成形部(1)を成形する成形室(11)に、電池(2)に加え
て、樹脂成形部(1)を成形する溶融状態の合成樹脂の侵
入を阻止する樹脂侵入阻止部(9)を有するホルダー(4)を
仮り止めして樹脂成形部(1)を成形し、樹脂侵入阻止部
(9)で安全弁(21)を外部に連通する排出経路を形成する
パック電池の製造方法。9. A mold (10) temporarily holds a battery (2) having a safety valve (21) which opens when the internal pressure of the battery (2) becomes higher than a set pressure, and the mold (10) is fixed to the mold chamber (11). A method for manufacturing a battery pack, in which a resin molding part (1) is molded on an end surface of a battery (2) provided with a safety valve (21) in a molding chamber (11) of (10), In addition to the battery (2), a holder (4) having a resin intrusion prevention part (9) for preventing intrusion of a molten synthetic resin for molding the resin molding part (1) is provided in a molding chamber (11) for molding ) To the resin molding part (1)
(9) A method of manufacturing a battery pack, wherein a discharge path for communicating the safety valve (21) with the outside is formed.
度保護素子(6)を配設してホルダー(4)を金型(10)の成形
室(11)に仮り止めし、金型(10)の成形室(11)に溶融状態
の合成樹脂を注入して、樹脂成形部(1)を成形する請求
項９に記載されるパック電池の製造方法。10. A temperature protection element (6) is arranged on a resin intrusion prevention part (9) of a holder (4), and the holder (4) is temporarily fixed to a molding chamber (11) of a mold (10), The method for manufacturing a battery pack according to claim 9, wherein a synthetic resin in a molten state is injected into the molding chamber (11) of the mold (10) to mold the resin molding portion (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001263707A JP3906046B2 (en) | 2001-08-31 | 2001-08-31 | Pack battery and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001263707A JP3906046B2 (en) | 2001-08-31 | 2001-08-31 | Pack battery and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003077434A true JP2003077434A (en) | 2003-03-14 |
| JP3906046B2 JP3906046B2 (en) | 2007-04-18 |
Family
ID=19090420
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001263707A Expired - Fee Related JP3906046B2 (en) | 2001-08-31 | 2001-08-31 | Pack battery and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3906046B2 (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004006213A (en) * | 2002-03-22 | 2004-01-08 | Matsushita Electric Ind Co Ltd | Battery pack |
| JP2006128062A (en) * | 2004-10-28 | 2006-05-18 | Samsung Sdi Co Ltd | Secondary battery |
| JP2007035638A (en) * | 2005-07-26 | 2007-02-08 | Samsung Sdi Co Ltd | Secondary battery |
| KR100700564B1 (en) * | 2004-11-10 | 2007-03-28 | 엘지전자 주식회사 | Mobile terminal having battery |
| JP2007323875A (en) * | 2006-05-31 | 2007-12-13 | Sony Corp | Top cover, battery pack and its manufacturing method |
| JP2007323949A (en) * | 2006-05-31 | 2007-12-13 | Sanyo Electric Co Ltd | Battery pack, and manufacturing method thereof |
| JP2007323937A (en) * | 2006-05-31 | 2007-12-13 | Sanyo Electric Co Ltd | Battery pack |
| JP2008027624A (en) * | 2006-07-18 | 2008-02-07 | Sanyo Electric Co Ltd | Battery pack and its manufacturing method |
| US7682734B2 (en) | 2004-02-28 | 2010-03-23 | Lg Electronics, Inc. | Rechargeable battery having pliable cell and manufacturing method thereof |
| JP2011096573A (en) * | 2009-10-30 | 2011-05-12 | Hitachi Maxell Ltd | Battery pack |
-
2001
- 2001-08-31 JP JP2001263707A patent/JP3906046B2/en not_active Expired - Fee Related
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004006213A (en) * | 2002-03-22 | 2004-01-08 | Matsushita Electric Ind Co Ltd | Battery pack |
| JP4589596B2 (en) * | 2002-03-22 | 2010-12-01 | パナソニック株式会社 | Battery pack |
| US7682734B2 (en) | 2004-02-28 | 2010-03-23 | Lg Electronics, Inc. | Rechargeable battery having pliable cell and manufacturing method thereof |
| JP2006128062A (en) * | 2004-10-28 | 2006-05-18 | Samsung Sdi Co Ltd | Secondary battery |
| US8691408B2 (en) | 2004-10-28 | 2014-04-08 | Samsung Sdi Co., Ltd. | Secondary battery including protective circuit module to protect battery when swelling occurs |
| JP4603906B2 (en) * | 2004-10-28 | 2010-12-22 | 三星エスディアイ株式会社 | Secondary battery |
| US7662506B2 (en) | 2004-11-10 | 2010-02-16 | Lg Electronics Inc. | Safety device of battery |
| KR100700564B1 (en) * | 2004-11-10 | 2007-03-28 | 엘지전자 주식회사 | Mobile terminal having battery |
| JP4579880B2 (en) * | 2005-07-26 | 2010-11-10 | 三星エスディアイ株式会社 | Secondary battery |
| US7858228B2 (en) | 2005-07-26 | 2010-12-28 | Samsung Sdi Co., Ltd. | Rechargeable battery |
| JP2007035638A (en) * | 2005-07-26 | 2007-02-08 | Samsung Sdi Co Ltd | Secondary battery |
| JP2007323937A (en) * | 2006-05-31 | 2007-12-13 | Sanyo Electric Co Ltd | Battery pack |
| JP2007323949A (en) * | 2006-05-31 | 2007-12-13 | Sanyo Electric Co Ltd | Battery pack, and manufacturing method thereof |
| JP2007323875A (en) * | 2006-05-31 | 2007-12-13 | Sony Corp | Top cover, battery pack and its manufacturing method |
| JP2008027624A (en) * | 2006-07-18 | 2008-02-07 | Sanyo Electric Co Ltd | Battery pack and its manufacturing method |
| JP2011096573A (en) * | 2009-10-30 | 2011-05-12 | Hitachi Maxell Ltd | Battery pack |
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|---|---|
| JP3906046B2 (en) | 2007-04-18 |
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