JP3534309B2 - Battery pack with temperature protection - Google Patents
Battery pack with temperature protectionInfo
- Publication number
- JP3534309B2 JP3534309B2 JP2000226261A JP2000226261A JP3534309B2 JP 3534309 B2 JP3534309 B2 JP 3534309B2 JP 2000226261 A JP2000226261 A JP 2000226261A JP 2000226261 A JP2000226261 A JP 2000226261A JP 3534309 B2 JP3534309 B2 JP 3534309B2
- Authority
- JP
- Japan
- Prior art keywords
- switch element
- temperature
- battery pack
- drive current
- control switch
- 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.)
- Expired - Lifetime
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
- Protection Of Static Devices (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
- Battery Mounting, Suspending (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、二次電池と該二次
電池の充放電を制御するスイッチ素子と該スイッチ素子
のオン、オフを制御する制御回路とを有する電池パック
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery pack having a secondary battery, a switch element for controlling charge / discharge of the secondary battery, and a control circuit for controlling ON / OFF of the switch element.
【０００２】[0002]
【従来の技術】図３は従来の温度保護付き電池パックの
構成例を示す図であり、１１は二次電池、１２はＰＴ
Ｃ、１３は保護ＩＣ、１４は電圧検出部、１５はスイッ
チ制御回路、Ｑ１は放電制御スイッチ素子、Ｑ２は充電
制御スイッチ素子を示す。2. Description of the Related Art FIG. 3 is a diagram showing a configuration example of a conventional battery pack with temperature protection, 11 is a secondary battery, and 12 is a PT.
C and 13 are protection ICs, 14 is a voltage detection unit, 15 is a switch control circuit, Q1 is a discharge control switch element, and Q2 is a charge control switch element.
【０００３】電池パックの従来の回路は、図３に示すよ
うにリチウムイオン電池やリチウムポリマー電池などの
化学セルである二次電池１１と、温度保護機能を有する
素子であるＰＴＣ１２と、放電制御スイッチ素子Ｑ１
と、充電制御スイッチ素子Ｑ２と、過充電や過放電の保
護を行うための電圧を検出する電圧検出部１４、電圧検
出部１４により検出した電圧に基づき外部のスイッチ素
子である放電制御スイッチ素子Ｑ１、充電制御スイッチ
素子Ｑ２をオン／オフ制御するスイッチ制御回路１５な
どを含む保護ＩＣ１３からなる。As shown in FIG. 3, a conventional circuit of a battery pack includes a secondary battery 11 which is a chemical cell such as a lithium ion battery or a lithium polymer battery, a PTC 12 which is an element having a temperature protection function, and a discharge control switch. Element Q1
And a charge control switch element Q2, a voltage detection unit 14 that detects a voltage for protecting overcharge and overdischarge, and a discharge control switch element Q1 that is an external switch element based on the voltage detected by the voltage detection unit 14. , A protection IC 13 including a switch control circuit 15 for on / off controlling the charge control switch element Q2.
【０００４】上記のように従来の電池パックでは、保護
回路に温度検出部はなく、温度に対する保護を行うため
には、ＰＴＣのような温度保護機能を有する素子や温度
ヒューズを充放電回路に挿入していた。そのため、過充
電や過放電の保護を行う回路とＰＴＣとの組み合わせ、
あるいは温度ヒューズなどとの組み合わせによる回路構
成が採用されていた。As described above, in the conventional battery pack, the protection circuit does not have a temperature detector, and in order to protect against temperature, an element having a temperature protection function such as PTC or a temperature fuse is inserted in the charge / discharge circuit. Was. Therefore, a combination of a circuit that protects against overcharge and overdischarge and a PTC,
Alternatively, a circuit configuration in combination with a temperature fuse has been adopted.
【０００５】[0005]
【発明が解決しようとする課題】ＰＴＣ及び温度ヒュー
ズは、高価で取付け取替え等に手間がかかると同時に小
型化の要求には満足のいくものではない。ＰＴＣは、二
次電池側に実装され、二次電池の温度が高温になった場
合に充電・放電電流を流さないように高インピーダンス
になる正温度特性サーミスタであるが、近年、二次電池
の小型化に伴って、ＰＴＣの実装エリアがなくなってき
ている。また、ＰＴＣは、所謂非線形抵抗素子としてイ
ンピーダンスをもち、図示のように充放電回路に直接挿
入するため、電池パックの容量を小さくする影響があ
り、効率を低下させる要因である。However, the PTC and the thermal fuse are expensive and require a lot of time for attachment and replacement, and at the same time, they cannot satisfy the demand for miniaturization. The PTC is a positive temperature characteristic thermistor that is mounted on the secondary battery side and has high impedance so that charging / discharging current does not flow when the temperature of the secondary battery becomes high. Along with the miniaturization, the PTC mounting area is disappearing. Further, the PTC has impedance as a so-called non-linear resistance element and is directly inserted into the charging / discharging circuit as shown in the figure, so that it has an effect of reducing the capacity of the battery pack and is a factor of lowering efficiency.
【０００６】温度保護として、サーミスタ等の温度検出
用素子を使い保護回路に追加することも考えられるが、
従来の使い方では、部品点数が多くなり、やはり実装ス
ペースや価格も満足できるようにすることは難しいのが
実情であった。For temperature protection, a temperature detecting element such as a thermistor may be used and added to the protection circuit.
In the conventional method, the number of parts is large and it is difficult to satisfy the mounting space and price.
【０００７】[0007]
【課題を解決するための手段】本発明は、上記課題を解
決するものであって、実装スペースを低減し簡単な構成
で安価な温度保護が行えるようにするものである。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to reduce the mounting space and to provide inexpensive temperature protection with a simple structure.
【０００８】そのために本発明は、二次電池と該二次電
池の充放電を制御するスイッチ素子と該スイッチ素子に
ドライブ電流を供給するスイッチ制御回路とを備えた電
池パックにおいて、前記スイッチ素子は、放電制御スイ
ッチ素子と充電制御スイッチ素子とからなり、少なくと
もいずれか一方のスイッチ素子のゲートとソースとの間
に前記スイッチ制御回路から供給される前記ドライブ電
流をバイパスするダイオード素子を前記ドライブ電流に
対して逆方向に接続し、前記ダイオード素子は、温度の
上昇に伴って逆電流が大きくなることで、前記ドライブ
電流をバイパスして、前記スイッチ素子をオフにするこ
とにより温度保護を行うことを特徴とするものである。Therefore, the present invention provides a battery pack comprising a secondary battery, a switch element for controlling charge / discharge of the secondary battery, and a switch control circuit for supplying a drive current to the switch element, wherein the switch element is A diode element which is composed of a discharge control switch element and a charge control switch element, and which bypasses the drive current supplied from the switch control circuit between the gate and the source of at least one of the switch elements. To the drive current
In the opposite direction, the diode element is
As the reverse current increases with increasing
You can bypass the current to turn off the switch element.
It is characterized in that the temperature is protected by and.
【０００９】また、前記スイッチ素子はＭＯＳ−ＦＥＴ
からなり、前記ダイオード素子は、前記放電制御スイッ
チ素子と充電制御スイッチ素子の少なくともいずれか一
方のゲートとソースとの間に逆方向に接続されたダイオ
ード素子であり、前記スイッチ制御回路と前記スイッチ
素子との間に前記ドライブ電流を制限する抵抗素子をさ
らに接続したことを特徴とするものである。The switch element is a MOS-FET.
The diode element is a diode element connected in a reverse direction between a gate and a source of at least one of the discharge control switch element and the charge control switch element, and the switch control circuit and the switch element. Further, a resistance element for limiting the drive current is further connected between and.
【００１０】[0010]
【発明の実施の形態】以下、本発明の実施の形態を図面
を参照しつつ説明する。図１は本発明に係る温度保護付
き電池パックの実施の形態を示す図であり、１は二次電
池、２は電圧検出部、３はスイッチ制御回路、Ｄはダイ
オード、Ｒは抵抗、Ｑ１は放電制御スイッチ素子、Ｑ２
は充電制御スイッチ素子を示す。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing an embodiment of a battery pack with temperature protection according to the present invention, in which 1 is a secondary battery, 2 is a voltage detector, 3 is a switch control circuit, D is a diode, R is a resistor, and Q1 is Discharge control switch element, Q2
Indicates a charge control switch element.
【００１１】図１において、二次電池１は、リチウムイ
オン電池やリチウムポリマー電池などの化学セルであ
り、電圧検出部２は、過充電や過放電の保護を行うため
の電圧を検出するものである。放電制御スイッチ素子Ｑ
１は、そのオンにより放電を行い、オフにより放電を停
止させ、充電制御スイッチ素子Ｑ２は、そのオンにより
充電を行い、オフにより放電を停止させる、ＭＯＳ−Ｆ
ＥＴからなる外部のスイッチ素子である。スイッチ制御
回路３は、電圧検出部により検出した電圧に基づき外部
のスイッチ素子である放電制御スイッチ素子Ｑ１、充電
制御スイッチ素子Ｑ２をオン／オフ制御するものであ
る。ダイオードＤは、スイッチ制御回路３のドライブ電
流が供給される放電制御スイッチ素子Ｑ１のゲートとソ
ースとの間に逆方向に接続して、温度保護を行う制御素
子として用いるものであり、抵抗Ｒは、スイッチ制御回
路３のドライブ電流を制限するものである。In FIG. 1, a secondary battery 1 is a chemical cell such as a lithium ion battery or a lithium polymer battery, and a voltage detection unit 2 detects a voltage for protecting overcharge and overdischarge. is there. Discharge control switch element Q
The MOS-F 1 is a MOS-F which discharges when turned on and stops discharging when turned off, and the charge control switch element Q2 charges when turned on and stops discharging when turned off.
It is an external switch element composed of ET. The switch control circuit 3 controls ON / OFF of the discharge control switch element Q1 and the charge control switch element Q2, which are external switch elements, based on the voltage detected by the voltage detection unit. The diode D is connected in the reverse direction between the gate and the source of the discharge control switch element Q1 to which the drive current of the switch control circuit 3 is supplied, and is used as a control element for performing temperature protection. The drive current of the switch control circuit 3 is limited.
【００１２】次に、ダイオードＤを用いた温度保護動作
について説明する。ダイオードＤは、温度により逆電流
が大きくなる逆方向特性を持つので、電池パック内部の
温度が上昇した高温になった場合に、スイッチ制御回路
３から放電制御スイッチ素子Ｑ１のゲートへのドライブ
電流を下げるように作用する。すなわち、放電制御スイ
ッチ素子Ｑ１のゲートとソースとの間に逆方向にダイオ
ードＤを接続すると、通常温度ではダイオードＤの逆電
流が小さいため、ＭＯＳ−ＦＥＴのドライブには影響を
与えないが、温度上昇とともにダイオードＤの逆電流が
過大となる。この変化を利用することにより、電池パッ
ク内部の温度が上昇して高温になると、スイッチ制御回
路３から放電制御スイッチ素子Ｑ１へのドライブ電流を
ダイオードＤにバイパスして放電制御スイッチ素子Ｑ１
のドライブ能力以下まで下げ、放電制御スイッチ素子Ｑ
１をオフにして放電を停止させる。Next, the temperature protection operation using the diode D will be described. Since the diode D has a reverse characteristic in which the reverse current increases with temperature, when the temperature inside the battery pack rises to a high temperature, the drive current from the switch control circuit 3 to the gate of the discharge control switch element Q1 is changed. Acts to lower. That is, when the diode D is connected in the reverse direction between the gate and the source of the discharge control switch element Q1, the reverse current of the diode D is small at normal temperature, so that it does not affect the drive of the MOS-FET, but As the temperature rises, the reverse current of the diode D becomes excessive. By utilizing this change, when the temperature inside the battery pack rises and becomes high, the drive current from the switch control circuit 3 to the discharge control switch element Q1 is bypassed to the diode D and the discharge control switch element Q1 is bypassed.
Discharge control switch element Q
Turn off 1 to stop the discharge.
【００１３】現在、電池パックの小型化により、保護回
路と二次電池との実装は、密接に固定される構成が多
く、ほぼ二次電池の温度と保護回路基板の温度が同一に
なっている。したがって、基板搭載部品であるダイオー
ドＤにより、二次電池の温度を検知することができ、遅
延なく温度の保護を実現することができる。At present, due to the miniaturization of battery packs, the mounting of the protective circuit and the secondary battery is often fixed closely, and the temperature of the secondary battery and the temperature of the protective circuit board are almost the same. . Therefore, the temperature of the secondary battery can be detected by the diode D, which is a component mounted on the board, and the temperature can be protected without delay.
【００１４】図２は本発明に係る温度保護付き電池パッ
クの他の実施の形態を示す図であり、Ｄ１、Ｄ２はダイ
オード、Ｒ１、Ｒ２は抵抗である。放電制御スイッチ素
子Ｑ１に対してのみ温度保護回路を付加した図１の実施
の形態に対し、充電制御制御スイッチ素子Ｑ２に対して
も同様の温度保護回路を付加した実施の形態を示したの
が図２である。すなわち、スイッチ制御回路３から放電
制御スイッチ素子Ｑ１のゲートに抵抗Ｒ１を通してドラ
イブ電流を供給するとともに、ゲートとソースとの間に
逆方向にダイオードＤ１を接続し、同様にスイッチ制御
回路３から充電制御スイッチ素子Ｑ２のゲートに抵抗Ｒ
２を通してドライブ電流を供給するとともに、ゲートと
ソースとの間に逆方向にダイオードＤ２を接続して、温
度が上昇し高温時に放電制御スイッチ素子Ｑ１及び充電
制御スイッチ素子Ｑ２をオフに制御するように構成した
ものである。FIG. 2 is a diagram showing another embodiment of the battery pack with temperature protection according to the present invention, in which D1 and D2 are diodes and R1 and R2 are resistors. In contrast to the embodiment of FIG. 1 in which a temperature protection circuit is added only to the discharge control switch element Q1, an embodiment in which a similar temperature protection circuit is added to the charge control control switch element Q2 is shown. It is FIG. That is, a drive current is supplied from the switch control circuit 3 to the gate of the discharge control switch element Q1 through the resistor R1, and a diode D1 is connected between the gate and the source in the reverse direction, and charge control is similarly performed from the switch control circuit 3. A resistor R is provided at the gate of the switch element Q2.
A drive current is supplied through 2 and a diode D2 is connected between the gate and the source in the opposite direction to control the discharge control switch element Q1 and the charge control switch element Q2 to be off when the temperature rises and is high. It is composed.
【００１５】従来のＰＴＣや温度ヒューズを用いた構成
は、充放電の双方向に対して温度によりスイッチを行う
ものであるが、本発明では、図２に示す実施の形態で、
充放電の双方向に対して温度によりスイッチを行うよう
にするだけでなく、図１に示す実施の形態で、放電方向
に限って温度によりスイッチを行うようにすることがで
き、しかも、ドライブ電流を制限する抵抗Ｒ１、Ｒ２の
設計によりそれぞれの動作条件を独立的に制御すること
ができる。In the conventional configuration using the PTC or the thermal fuse, switching is performed depending on the temperature in both directions of charge / discharge, but in the present invention, in the embodiment shown in FIG.
Not only can the switching be performed according to the temperature in both charging and discharging directions, but in the embodiment shown in FIG. 1, the switching can be performed according to the temperature only in the discharging direction, and the drive current can be changed. The operating conditions can be controlled independently by designing the resistors R1 and R2 that limit the current.
【００１６】なお、本発明は、上記実施の形態に限定さ
れるものではなく、種々の変形が可能である。例えば上
記実施の形態では、放電制御スイッチ素子及び充電制御
スイッチ素子を二次電池のマイナス側に接続した構成を
示したが、勿論二次電池のプラス側に接続した構成でも
同様に可能であり、また、ドライブ電流を制限する抵抗
としては、トリマー抵抗にすることにより、より温度精
度を上げることも可能である。さらに、温度を検出して
温度に応じて非線形に抵抗が制御される素子（温度検出
抵抗素子）として、ダイオードを逆方向に接続して用い
たが、温度が上昇し高温時に非線形に抵抗が大きく変化
する他の素子を用いてもよいし、温度が異常に上昇した
ときに充放電制御スイッチ素子のドライブ電流をドライ
ブ能力以下に下げる構成の回路であれば、他の回路構成
を採用してもよい。The present invention is not limited to the above embodiment, but various modifications can be made. For example, in the above-mentioned embodiment, the discharge control switch element and the charge control switch element are shown connected to the negative side of the secondary battery, but of course the same can be applied to the structure connected to the positive side of the secondary battery, Further, the temperature accuracy can be further improved by using a trimmer resistance as the resistance for limiting the drive current. Furthermore, as an element whose temperature is detected and resistance is controlled nonlinearly according to the temperature (temperature detection resistance element), a diode was connected in the reverse direction, but when the temperature increased and the temperature increased, the resistance increased nonlinearly. Other elements that change may be used, or another circuit configuration may be adopted as long as the circuit is configured to reduce the drive current of the charge / discharge control switch element to the drive capacity or less when the temperature rises abnormally. Good.
【００１７】[0017]
【発明の効果】以上の説明から明らかなように、本発明
によれば、二次電池と該二次電池の充放電を制御するス
イッチ素子と該スイッチ素子のオン、オフを制御する制
御回路とを有する電池パックにおいて、温度が上昇し高
温時に充放電を制御するスイッチ素子のドライブ回路に
当該ドライブ電流を下げる温度検出抵抗素子を接続した
ので、充放電の電流回路にＰＴＣや温度ヒューズを挿入
することなく、スイッチ素子のドライブ回路で温度保護
機能を実現することができる。As is apparent from the above description, according to the present invention, a secondary battery, a switch element for controlling charge / discharge of the secondary battery, and a control circuit for controlling ON / OFF of the switch element are provided. In the battery pack having the above, since the temperature detection resistance element that reduces the drive current is connected to the drive circuit of the switch element that controls the charging / discharging when the temperature rises and the temperature is high, the PTC or the temperature fuse is inserted in the charging / discharging current circuit. The temperature protection function can be realized by the drive circuit of the switch element without the need.
【００１８】また、温度検出抵抗素子として、温度が上
昇し高温時に逆電流が大きくなるダイオード素子を充放
電を制御するスイッチ素子のドライブ電流を下げる方向
に接続し、スイッチ素子は、放電制御スイッチ素子と充
電制御スイッチ素子からなり、少なくとも放電制御スイ
ッチ素子にダイオード素子を接続し、スイッチ素子とし
て、ＭＯＳ−ＦＥＴを用い、該ＭＯＳ−ＦＥＴのゲート
とソースとの間に温度検出抵抗素子を接続したので、高
価なＰＴＣや温度ヒューズを使うことなく、実装スペー
スや価格を低減し、少ない部品点数、構成で温度保証が
可能となり、安価に小型化への要求を満たす保護機能を
実現することができる。As the temperature detecting resistance element, a diode element whose temperature increases and reverse current increases at high temperature is connected in the direction of decreasing the drive current of the switch element for controlling charge / discharge, and the switch element is a discharge control switch element. Since the diode element is connected to at least the discharge control switch element, the MOS-FET is used as the switch element, and the temperature detection resistance element is connected between the gate and the source of the MOS-FET, It is possible to reduce the mounting space and cost without using an expensive PTC or thermal fuse, to guarantee the temperature with a small number of components and a configuration, and to realize a protection function that satisfies the demand for miniaturization at low cost.
【図１】 本発明に係る温度保護付き電池パックの実施
の形態を示す図である。FIG. 1 is a diagram showing an embodiment of a battery pack with temperature protection according to the present invention.
【図２】 本発明に係る温度保護付き電池パックの他の
実施の形態を示す図である。FIG. 2 is a diagram showing another embodiment of the battery pack with temperature protection according to the present invention.
【図３】 従来の温度保護付き電池パックの構成例を示
す図である。FIG. 3 is a diagram showing a configuration example of a conventional battery pack with temperature protection.
１…二次電池、２…電圧検出部、３…スイッチ制御回
路、Ｄ…ダイオード、Ｒ…抵抗、Ｑ１…放電制御スイッ
チ素子、Ｑ２…充電制御スイッチ素子DESCRIPTION OF SYMBOLS 1 ... Secondary battery, 2 ... Voltage detection part, 3 ... Switch control circuit, D ... Diode, R ... Resistance, Q1 ... Discharge control switch element, Q2 ... Charge control switch element
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ Ｈ０２Ｊ 7/10 Ｈ０２Ｊ 7/10 Ｎ (58)調査した分野(Int.Cl.7，ＤＢ名) H02J 7/00 - 7/12 H02J 7/34 - 7/36 H01M 2/10 H01M 10/44 H01M 10/48 301 ─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. 7 identification code FI H02J 7/10 H02J 7/10 N (58) Fields investigated (Int.Cl. 7 , DB name) H02J 7/00-7 / 12 H02J 7/34-7/36 H01M 2/10 H01M 10/44 H01M 10/48 301
Claims (3)
るスイッチ素子と該スイッチ素子にドライブ電流を供給
するスイッチ制御回路とを備えた電池パックにおいて、
前記スイッチ素子は、放電制御スイッチ素子と充電制御
スイッチ素子とからなり、少なくともいずれか一方のス
イッチ素子のゲートとソースとの間に前記スイッチ制御
回路から供給される前記ドライブ電流をバイパスするダ
イオード素子を前記ドライブ電流に対して逆方向に接続
し、前記ダイオード素子は、温度の上昇に伴って逆電流
が大きくなることで、前記ドライブ電流をバイパスし
て、前記スイッチ素子をオフにすることにより温度保護
を行うことを特徴とする温度保護付き電池パック。1. A battery pack comprising a secondary battery, a switch element for controlling charging / discharging of the secondary battery, and a switch control circuit for supplying a drive current to the switch element,
The switching element is composed of a discharge control switch element and the charge control switch element, bypassing the drive current supplied from the switch control circuit between at least one gate and the source of one of the switching elements da
Connect the ion element in the opposite direction to the drive current
However, the diode element causes a reverse current as the temperature rises.
Is larger, bypassing the drive current
Temperature protection by turning off the switch element.
Temperature protected battery pack and performing.
なり、前記ダイオード素子は、前記放電制御スイッチ素
子と充電制御スイッチ素子の少なくともいずれか一方の
ゲートとソースとの間に逆方向に接続されたダイオード
素子であることを特徴とする請求項１記載の温度保護付
き電池パック。2. The switch element is a MOS-FET, and the diode element is a diode connected in a reverse direction between a gate and a source of at least one of the discharge control switch element and the charge control switch element. temperature protected battery pack according to claim 1, characterized in that an element.
子との間に前記ドライブ電流を制限する抵抗素子をさら
に接続したことを特徴とする請求項１記載の温度保護付
き電池パック。Wherein the switch control circuit and the temperature-protected battery pack according to claim 1, characterized in that connected the further resistive element that limits the drive current between the switch element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000226261A JP3534309B2 (en) | 2000-07-27 | 2000-07-27 | Battery pack with temperature protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000226261A JP3534309B2 (en) | 2000-07-27 | 2000-07-27 | Battery pack with temperature protection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002044873A JP2002044873A (en) | 2002-02-08 |
| JP3534309B2 true JP3534309B2 (en) | 2004-06-07 |
Family
ID=18719907
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000226261A Expired - Lifetime JP3534309B2 (en) | 2000-07-27 | 2000-07-27 | Battery pack with temperature protection |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100452511B1 (en) * | 2002-05-04 | 2004-10-13 | 엘지전자 주식회사 | A detecting circuit of charging state for cordless phone |
| EP1758226A1 (en) | 2004-06-16 | 2007-02-28 | Murata Manufacturing Co., Ltd. | Battery pack protecting circuit and battery pack |
| JP4882235B2 (en) * | 2005-01-27 | 2012-02-22 | ミツミ電機株式会社 | Battery protection module |
| KR100877675B1 (en) | 2006-07-13 | 2009-01-12 | 주식회사 엘지화학 | Protection apparatus for secondary battery |
| JP5177842B2 (en) * | 2007-10-19 | 2013-04-10 | Ｎｅｃエナジーデバイス株式会社 | Protection circuit and battery pack |
| JP2010244844A (en) * | 2009-04-06 | 2010-10-28 | Nec Energy Devices Ltd | Battery pack |
| CN202190065U (en) * | 2011-08-04 | 2012-04-11 | 深圳市雄韬电源科技股份有限公司 | Battery protection circuit |
| CN103516024B (en) * | 2013-10-09 | 2017-01-04 | 广东美美创新电器有限公司 | Health warmer battery case |
| KR101446994B1 (en) * | 2013-12-09 | 2014-10-07 | 주식회사 모브릭 | Method for automatically breaking power at high temperature and high current based on Metal-Insulator Transition and switch for using the same |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3018816B2 (en) * | 1993-02-22 | 2000-03-13 | 株式会社日立製作所 | Semiconductor element protection circuit and semiconductor device having the same |
| JP3805807B2 (en) * | 1995-02-01 | 2006-08-09 | 株式会社東芝 | Secondary battery charging circuit |
| JPH11215716A (en) * | 1998-01-20 | 1999-08-06 | Matsushita Electric Ind Co Ltd | Battery managing apparatus, battery package, and electronic appliance |
| JP2000152516A (en) * | 1998-11-13 | 2000-05-30 | Nec Saitama Ltd | Battery pack temperature protecting circuit |
| JP3940508B2 (en) * | 1998-11-20 | 2007-07-04 | 株式会社東芝 | Secondary battery protection circuit device |
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2000
- 2000-07-27 JP JP2000226261A patent/JP3534309B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JP2002044873A (en) | 2002-02-08 |
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