JPH02237437A - Overcharging preventer - Google Patents
Overcharging preventerInfo
- Publication number
- JPH02237437A JPH02237437A JP5286589A JP5286589A JPH02237437A JP H02237437 A JPH02237437 A JP H02237437A JP 5286589 A JP5286589 A JP 5286589A JP 5286589 A JP5286589 A JP 5286589A JP H02237437 A JPH02237437 A JP H02237437A
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- battery
- sensitive switch
- charging
- zener diode
- 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
- 230000002265 prevention Effects 0.000 claims description 2
- 238000007600 charging Methods 0.000 abstract description 30
- 238000010438 heat treatment Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 3
- 230000006378 damage Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 229910001285 shape-memory alloy Inorganic materials 0.000 description 2
- 235000014676 Phragmites communis Nutrition 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000010277 constant-current charging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
Landscapes
- Protection Of Static Devices (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は電池の過充電を防止する装置に関する。[Detailed description of the invention] [Industrial application field] The present invention relates to a device for preventing overcharging of a battery.
［従来の技術］
一般に電池においては、適正な充電条件を越えて過充電
を行うと電解液の分解に伴なってガスが発生する。開放
型または排出型の電池においては、発生したガスを逃が
すことができる力釈その結果電極は多少損傷を受ける。[Prior Art] In general, when a battery is overcharged beyond proper charging conditions, gas is generated as the electrolyte decomposes. In open or evacuated cells, the electrodes are damaged to some extent as a result of the strain that allows the generated gas to escape.
一方、密閉型の電池では、ガス圧が内部で高まり、爆発
事故を起す。なお、密閉型電池においては過充電に対し
て、安全弁を設けることによりガス圧の上昇に配慮して
いるものがあるが、これらの安全弁を設けた電池にあっ
てはガス抜きを確実に行なえない場合も生じ、信頼性の
面で問題がある。しかも、安全弁の作動により腐食性の
高いガスが放出されるため、電池が組込まれた機器を腐
食させるという欠点がある。On the other hand, in sealed batteries, gas pressure builds up inside, causing an explosion. Note that some sealed batteries are equipped with a safety valve to prevent overcharging from increasing gas pressure, but batteries equipped with these safety valves cannot be vented reliably. There are also problems with reliability. Moreover, since highly corrosive gas is released when the safety valve is operated, there is a drawback that it corrodes equipment in which the battery is installed.
それ故、電池を完全に充電し、安全に使用できる装置が
必要である。Therefore, there is a need for a device that allows batteries to be fully charged and used safely.
カナダ特許第６９８４３７号および米国特許第３，３４
３，０５８号では、電池にダイオードを並列に入れるこ
とにより、該電池の適切な充電条件を越えて過充電され
た時、ダイオード側に電流を放散させて電池側に電流を
ほとんど流さないようにすることにより、以上のような
問題を解決しようとしている。Canadian Patent No. 698437 and U.S. Patent No. 3,34
In No. 3,058, by inserting a diode in parallel with the battery, when the battery is overcharged beyond the appropriate charging conditions, the current is dissipated to the diode side so that almost no current flows to the battery side. By doing so, we are trying to solve the problems mentioned above.
しかし、これら２つの解決手段に伴なう問題として、ダ
イオードを十分に大きくして全電流量を放散させる必要
があるため、物理的に大きな素子が必要となり、しかも
その際の発熱についても考慮が必要である。However, the problem with these two solutions is that the diode needs to be large enough to dissipate the entire amount of current, which requires a physically large element and also requires consideration of the heat generated. is necessary.
また、一般に市販されている蓄電池では、サーモスタッ
トもしくは温度ヒューズ等を電池に直列に接続し、適切
な充電条件を越えて過充電されたときの該電池の発熱を
検知し、充電回路を遮断することにより以上のような問
題を解決しようとしている。In general, commercially available storage batteries have a thermostat or thermal fuse connected in series with the battery to detect heat generation in the battery when it is overcharged beyond appropriate charging conditions, and to shut off the charging circuit. We are trying to solve the above problems.
しかし、サーモスタットのような復帰型の感温スイッチ
では、該電池が適切な充電条件を越えて過充電されたと
籾にサーモスタットが作動するに至った場合、断続的に
充電が継続され、該電池が破壊されるのに至る時間は延
長されるが、該電池の破壊を防止することはできない。However, with a reset-type temperature-sensitive switch such as a thermostat, if the battery is overcharged beyond the appropriate charging conditions and the thermostat is activated, charging continues intermittently and the battery is overcharged. Although the time until destruction is extended, destruction of the battery cannot be prevented.
温度ヒューズのような非復帰型の感温スイッチでは、サ
ーモスタットの場合のような問題はないか、保存状態で
温度ヒューズが作動しないように温度ヒューズの溶断温
度を充分に高く設定しなければならず、そのため該電池
が適切な充電条件を越えて過充電された場合にはサーモ
スタットのように低い温度で作動しないので、電池が破
壊されることが全くない安全な状態で充電回路を遮断す
ることが難しい。For non-resettable temperature-sensitive switches such as thermal fuses, the fusing temperature of the thermal fuse must be set high enough to avoid the same problems as with thermostats, or to prevent the thermal fuse from operating in the stored state. Therefore, if the battery is overcharged beyond the appropriate charging conditions, it will not operate at a low temperature like a thermostat, so it will be possible to shut off the charging circuit in a safe manner without damaging the battery. difficult.
本発明の目的は以上のような問題を解消した電池の過充
電防止装置を提供することにある。An object of the present invention is to provide a battery overcharge prevention device that solves the above-mentioned problems.
［課題を解決するための手段］
本発明は、電池に直列に接続された感温スイッチど、電
池および感温スイッヂの直列回路に直列に接続された温
度ヒューズと、電池および感温スイッチの直列回路に並
列に接続されたツェナダイオートとを有し、温度ヒュー
ズはツェナーダイオードの温度を検知し得る位置に配置
され、感温スイッチは電池の温度を検知し得る位置に配
置されていることを特徴とする。[Means for Solving the Problems] The present invention provides a temperature-sensitive switch connected in series to a battery, a thermal fuse connected in series to a series circuit of the battery and the temperature-sensitive switch, and a series circuit of the battery and the temperature-sensitive switch. and a Zener diode connected in parallel to the circuit, the thermal fuse is placed in a position where it can detect the temperature of the Zener diode, and the temperature sensitive switch is placed in a position where it can detect the temperature of the battery. Features.
なお、木発明でいう感温スイッチは、ある一定温度以上
になると開放状態になり、再びある一定温度以下になる
と導通状態となる、一般にブレイク型の感温スイッチで
あり、サーモスタット，感温リードスイッチ，ＰＴＣ素
子，形状記憶合金を利用したスイッチ等が適用できる。In addition, the temperature-sensitive switch referred to in the wooden invention is generally a break-type temperature-sensitive switch that becomes open when the temperature exceeds a certain level and becomes conductive when the temperature falls below a certain level, and is used in thermostats and temperature-sensitive reed switches. , PTC elements, switches using shape memory alloys, etc. can be applied.
感温スイッチが開放状態になる作動温度は４０℃〜２０
０℃に設定するのが好ましい。The operating temperature at which the temperature-sensitive switch becomes open is 40°C to 20°C.
Preferably, the temperature is set at 0°C.
温度ヒューズとは、ある一定温度以上になると回路を開
放状態とする素子のことで、非復帰のブレイク型の感温
スイッチを意味する。一般に、低融点金属，感温樹脂等
の感温材料を用いた温度ヒューズが市販されているが、
非復帰性の形状記憶合金を用いても容易に作ることが可
能である。A thermal fuse is an element that opens a circuit when the temperature exceeds a certain level, and refers to a non-resettable, break-type temperature-sensitive switch. Generally, thermal fuses using temperature-sensitive materials such as low-melting point metals and thermosensitive resins are commercially available.
It can also be easily made using a non-recoverable shape memory alloy.
温度ヒューズが、開放状態になる温度は、前記の感温ス
イッチの作動温度に比へて高い温度に設定するのが好ま
しく、６０℃〜２５０℃に設定する。The temperature at which the thermal fuse becomes open is preferably set at a higher temperature than the operating temperature of the temperature-sensitive switch, and is set at 60°C to 250°C.
ツェナーダイオードとは、一定電圧以上の電圧か印加さ
れた場合に急激に電流が流れ出す素子のことであり、定
電圧ダイオード．一定電圧が印加されると遮断状態から
短絡状態となる過電圧保護回路及び、これらと同じ機能
を有する過電圧保護集積回路等を意味する。かかる電流
の流れ出ず電圧（以下ツェナー電圧という）は、正常な
充電電圧が琉れている場合には電流が流れず、正常な充
電電圧を越える電圧が印加された場合に電流が流れ出す
ように設定することが好ましい。A Zener diode is an element in which current suddenly flows when a voltage higher than a certain voltage is applied, and is a constant voltage diode. This refers to an overvoltage protection circuit that changes from a cutoff state to a short circuit state when a constant voltage is applied, and an overvoltage protection integrated circuit that has the same function as these circuits. The voltage at which current does not flow (hereinafter referred to as Zener voltage) is set so that no current flows when the normal charging voltage is exceeded, and current starts flowing when a voltage exceeding the normal charging voltage is applied. It is preferable to do so.
［作 用］
本発明によれば正常な充電条件を越えて電池が過充電さ
れるに至ると、次のように動作する。すなわち１つには
、電池の電位がツェナーダイオードに電流が流れて温度
ヒューズを溶断ずるには至らｌｔいが、過充電によって
電池温度が上昇し感温スイッチが作動するに至った場合
である。感温スイッチによって充電回路が遮断されると
、充電器から印加される電圧は上昇し、ツェナーダイオ
ードに電流が流れだして当該ツェナーダイオードの温度
が上昇し、温度ヒューズが落断され、完全に充電回路が
遮断される。２つには、電池の温度の上昇は小さく、感
温スイッチが作動するには至らないか、過充電によって
電池の電位か徐々に上昇し、ツェナーダイオードに電流
が流れ出して当該ツェナ〜ダイオードの温度が上昇し、
温度ヒューズを溶断して充電回路を完全に遮断する。[Function] According to the present invention, when the battery is overcharged beyond normal charging conditions, the following operation occurs. That is, one case is that the potential of the battery is not high enough to cause current to flow through the Zener diode and blow out the thermal fuse, but the battery temperature rises due to overcharging and the temperature-sensitive switch is activated. When the charging circuit is cut off by the temperature-sensitive switch, the voltage applied from the charger increases, current begins to flow through the Zener diode, the temperature of the Zener diode increases, the thermal fuse is blown, and the battery is fully charged. The circuit is interrupted. Second, the rise in battery temperature is small enough that the temperature-sensitive switch does not activate, or the potential of the battery gradually increases due to overcharging, causing current to flow into the Zener diode and increasing the temperature of the Zener diode. rises,
Completely cut off the charging circuit by blowing the thermal fuse.
１つめの動作メカニズムは、急速充電、及び直列に配置
された組み電池における単電池の過充電に対して有効に
機能し、２つめはゆっくりとした充電時の過充電に対し
て有効に機能し、安全に充電回路を開放状態にせしめる
。The first operating mechanism works effectively against rapid charging and overcharging of cells in assembled batteries arranged in series, and the second works effectively against overcharging during slow charging. , safely open the charging circuit.
［実施例】
前述の如く、本発明の保護回路は単電池もしくは２個以
上の単゛か池からなる組電池に組込むことが可能であり
、その実施例を図面を参照して説明する。[Embodiment] As mentioned above, the protection circuit of the present invention can be incorporated into a single cell or an assembled battery consisting of two or more single cells, and examples thereof will be described with reference to the drawings.
第１図は単電池に適用した木発明実施例の回路例を示す
。FIG. 1 shows an example of a circuit according to an embodiment of the invention applied to a single battery.
電池ｌには、直列に感温スイッチ２が接続されており、
電池１の温度を感温スイッチ２によって検知し得るよう
に電池１と感温スイッチ２とは熱的に接触せしめる。第
１図においては電池１の負極側に感温スイッチ２は接続
されているが、正極側に接続してもさしつかえない。A temperature-sensitive switch 2 is connected in series to the battery l.
The battery 1 and the temperature-sensitive switch 2 are brought into thermal contact so that the temperature of the battery 1 can be detected by the temperature-sensitive switch 2. Although the temperature-sensitive switch 2 is connected to the negative electrode side of the battery 1 in FIG. 1, it may be connected to the positive electrode side.
さらに、直列に接続された電池１と感温スイッチ２に並
列にツエナーダイ才一ド３を接続する。Further, a Zener die switch 3 is connected in parallel to the battery 1 and the temperature-sensitive switch 2, which are connected in series.
これら電池１，感温スイッチ２とツェナーダイオード３
からなる閉回路に直列に温度ヒューズ４を接続する。ツ
ェナーダイオード３と温度ヒューズ４とはツェナーダイ
オード４の温度を温度ヒューズ４で検知し得るように熱
的に接触せしめる。第１図においては、温度ヒューズ４
は電池１側に接続してあるが、感温スイッチ２側でもさ
しつかえない。さらに第１図のように充電器５を接続す
る。These batteries 1, temperature sensitive switch 2 and Zener diode 3
A thermal fuse 4 is connected in series to a closed circuit consisting of the following. The Zener diode 3 and the thermal fuse 4 are brought into thermal contact so that the temperature of the Zener diode 4 can be detected by the thermal fuse 4. In FIG. 1, thermal fuse 4
is connected to the battery 1 side, but it can also be connected to the temperature sensitive switch 2 side. Furthermore, the charger 5 is connected as shown in FIG.
このように電池１，感温スイッチ２．ツエナーダイオー
ト３と温度ヒューズ４からなるモジュール電池を充電器
５に接続し充電を実施する。このとき、適正な充電量を
越えて充電が継続された場合、たとえば、０．５Ｃの定
電流充電が連続して実施された場合、電池１は過充電状
態となり発熱する。その結果、重油缶の温度が徐々に上
昇し、それに伴って感温スイッチ２の温度も上昇する。In this way, a battery 1, a temperature sensitive switch 2. A module battery consisting of a Zener diode 3 and a thermal fuse 4 is connected to a charger 5 and charged. At this time, if charging continues beyond the appropriate charging amount, for example, if constant current charging of 0.5 C is performed continuously, the battery 1 becomes overcharged and generates heat. As a result, the temperature of the heavy oil can gradually rises, and the temperature of the temperature-sensitive switch 2 also rises accordingly.
なお、感温スイッチとしては、バイメタル式のサーモス
タットを使用した。Note that a bimetallic thermostat was used as the temperature-sensitive switch.
電池缶の温度が感温スイッチ２の動作温度に達すると、
感温スイッチ２が開放状態となり、ツェナーダイオード
３に０．５Ｇの電流が流れだし、ツェナーダイオード３
が発熱し、温度ヒューズ４を加熱する。それから数秒か
ら数ｌＯ秒で、温度ヒューズ４の溶断温度に達し、温度
ヒューズ４が溶断し、充電回路は開放され、以後の電池
の過充電は防止ざれる。この場合、ツエナーダイ才一ド
には、１００ｍＷ−Ｓ−１０Ｗの小電力用の、ツェナー
電圧が正常な充電時の充電電圧よりもわずかに高い電圧
のものを用いれば、電池の電気容量が、０．５〜５０＾
ｈの場合には充分である。When the temperature of the battery can reaches the operating temperature of the temperature-sensitive switch 2,
The temperature-sensitive switch 2 becomes open, and a current of 0.5G begins to flow through the Zener diode 3.
generates heat and heats the thermal fuse 4. After several seconds to several 10 seconds, the melting temperature of the thermal fuse 4 is reached, the thermal fuse 4 melts, the charging circuit is opened, and subsequent overcharging of the battery is prevented. In this case, if you use a Zener die with a small power of 100mW-S-10W and a Zener voltage slightly higher than the charging voltage during normal charging, the electric capacity of the battery can be reduced to 0. .5~50^
This is sufficient for h.
本発明装置は、多数の電池を組み合わせた組み電池の場
合により有効に作用する。The device of the present invention works more effectively in the case of an assembled battery that is a combination of a large number of batteries.
次に２個の電池からなる組み電池に適用した例を示す。Next, an example in which the present invention is applied to a battery assembly consisting of two batteries will be shown.
第２図は、第１図における６池１と感温スイッチ２の組
が、直列に２個挿入された構成をとっている。単純に、
第１図における構成を２つ直列に接続してもかまわない
が、第２図における構成で充分である。２ヶの電池１の
うち、どちらか１方が、過充電の状態になると、過充電
状態となった電池１とサーモカップリングした感温スイ
ッチ２が開放状態となり、ツェナーダイオード３に電流
が流れ出して、発熱することにより、温度ヒューズ４を
加熱し、温度ヒューズ４が溶断され、充電回路が開放状
態となり、以後の過充電は防止される。FIG. 2 shows a configuration in which two sets of six ponds 1 and temperature-sensitive switches 2 shown in FIG. 1 are inserted in series. Simply,
Although two of the configurations in FIG. 1 may be connected in series, the configuration in FIG. 2 is sufficient. When one of the two batteries 1 becomes overcharged, the temperature-sensitive switch 2 thermo-coupled to the overcharged battery 1 becomes open, and current begins to flow into the Zener diode 3. By generating heat, the thermal fuse 4 is heated, the thermal fuse 4 is blown, the charging circuit is opened, and subsequent overcharging is prevented.
次に多数の電池からなる組電池への適用例を示す。第３
図は、電池１と感温スイッチ２の組が直列にｎ個接続さ
れたものに、ツェナーダイ才一ド３が並列に接続され、
さらに温度ヒーズ４か直列に接続されている。もしいず
れか１つの単電池が過充電状態になれは、該電池とサー
モカップリングした感温スイッチが開放状態となり、ツ
ェナーダイ才一ト３に電流が流れ、温度ヒューズ４が溶
断され、充電回路が開放状態となる。また、第３図の構
成の回路をさらに直列に組み合わせてもさしつかえない
。Next, an example of application to a battery assembly consisting of a large number of batteries will be shown. Third
The figure shows n sets of batteries 1 and temperature-sensitive switches 2 connected in series, and a Zener die 3 connected in parallel.
Furthermore, a temperature heater 4 is connected in series. If any one battery becomes overcharged, the temperature-sensitive switch thermo-coupled with the battery becomes open, current flows through the Zener die capacitor 3, the thermal fuse 4 is blown, and the charging circuit is closed. It becomes open. Furthermore, the circuits having the configuration shown in FIG. 3 may be further combined in series.
第１図は本発明一実施例の回路図、
第２図は本発明の他の実施例の回路図、第３図は本発明
のさらに他の実施例の回路図である。
［発明の効果１
以上詳述した如く、本発明によれば、誤まった充電法．
充電器の故障．組み電池を構成する単電池の故障等によ
フて、単電池の過充電が進行した場合に、確実に充電回
路を遮断することができる。
１：電β亡
２１へ温ス不・ノ午
３：゛ソエナータイオード
４：劫℃λ−ス゛
４：須υ（℃ユース゛′
第１図
第２図
１：電シと
４：劫℃ユース゛
第３図FIG. 1 is a circuit diagram of one embodiment of the invention, FIG. 2 is a circuit diagram of another embodiment of the invention, and FIG. 3 is a circuit diagram of still another embodiment of the invention. [Effect of the Invention 1] As detailed above, according to the present invention, it is possible to eliminate the problem of incorrect charging method.
Charger failure. When overcharging of a single battery progresses due to a failure or the like of a single battery that constitutes an assembled battery, the charging circuit can be reliably shut off. 1: Electrical β-destruction 21 to warm temperature 3: ゛ Soenertaiode 4: ℃λ - ゛ 4: Su υ (℃ use ゛') Youth Figure 3
Claims (1)
および前記感温スイッチの直列回路に直列に接続された
温度ヒューズと、前記電池および前記感温スイッチの直
列回路に並列に接続されたツェナダイオードとを有し、
前記温度ヒューズは前記ツェナーダイオードの温度を検
知し得る位置に配置され、前記感温スイッチは前記電池
の温度を検知し得る位置に配置されていることを特徴と
する過充電防止装置。1) A temperature-sensitive switch connected in series to a battery, a thermal fuse connected in series to the series circuit of the battery and the temperature-sensing switch, and a thermal fuse connected in parallel to the series circuit of the battery and the temperature-sensing switch. It has a Zener diode,
An overcharge prevention device characterized in that the thermal fuse is arranged at a position where the temperature of the Zener diode can be detected, and the temperature sensitive switch is arranged at a position where the temperature of the battery can be detected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5286589A JPH02237437A (en) | 1989-03-07 | 1989-03-07 | Overcharging preventer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5286589A JPH02237437A (en) | 1989-03-07 | 1989-03-07 | Overcharging preventer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02237437A true JPH02237437A (en) | 1990-09-20 |
Family
ID=12926764
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5286589A Pending JPH02237437A (en) | 1989-03-07 | 1989-03-07 | Overcharging preventer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02237437A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0287935A (en) * | 1988-09-22 | 1990-03-28 | Asahi Chem Ind Co Ltd | Overcharge prevention circuit |
| WO1995000993A1 (en) * | 1993-06-17 | 1995-01-05 | Bolder Battery, Inc. | Cutoff circuit for battery recharger |
| US5689173A (en) * | 1995-02-07 | 1997-11-18 | Sanyo Electric Co., Ltd. | Battery pack |
| WO1999010940A1 (en) * | 1997-08-22 | 1999-03-04 | Duracell Inc. | Current interrupter for electrochemical cells |
| JP2002231319A (en) * | 2001-02-02 | 2002-08-16 | Japan Storage Battery Co Ltd | Secondary battery |
| WO2005124807A1 (en) * | 2004-06-16 | 2005-12-29 | Bimetal Japan Incorporated | Voltage judgment method, voltage judgment part, power cut-off method, and power cut-off device |
| JP2006185708A (en) * | 2004-12-27 | 2006-07-13 | Nissan Motor Co Ltd | Secondary battery |
| JP2007128818A (en) * | 2005-11-07 | 2007-05-24 | Nec Tokin Corp | Battery pack |
| JP2015215214A (en) * | 2014-05-09 | 2015-12-03 | Koa株式会社 | Temperature history storage device |
-
1989
- 1989-03-07 JP JP5286589A patent/JPH02237437A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0287935A (en) * | 1988-09-22 | 1990-03-28 | Asahi Chem Ind Co Ltd | Overcharge prevention circuit |
| WO1995000993A1 (en) * | 1993-06-17 | 1995-01-05 | Bolder Battery, Inc. | Cutoff circuit for battery recharger |
| US5689173A (en) * | 1995-02-07 | 1997-11-18 | Sanyo Electric Co., Ltd. | Battery pack |
| WO1999010940A1 (en) * | 1997-08-22 | 1999-03-04 | Duracell Inc. | Current interrupter for electrochemical cells |
| JP2002231319A (en) * | 2001-02-02 | 2002-08-16 | Japan Storage Battery Co Ltd | Secondary battery |
| WO2005124807A1 (en) * | 2004-06-16 | 2005-12-29 | Bimetal Japan Incorporated | Voltage judgment method, voltage judgment part, power cut-off method, and power cut-off device |
| JP2006185708A (en) * | 2004-12-27 | 2006-07-13 | Nissan Motor Co Ltd | Secondary battery |
| JP2007128818A (en) * | 2005-11-07 | 2007-05-24 | Nec Tokin Corp | Battery pack |
| JP2015215214A (en) * | 2014-05-09 | 2015-12-03 | Koa株式会社 | Temperature history storage device |
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