JPH10208779A - Protective circuit for pack battery and secondary battery - Google Patents

Protective circuit for pack battery and secondary battery

Info

Publication number
JPH10208779A
JPH10208779A JP9012765A JP1276597A JPH10208779A JP H10208779 A JPH10208779 A JP H10208779A JP 9012765 A JP9012765 A JP 9012765A JP 1276597 A JP1276597 A JP 1276597A JP H10208779 A JPH10208779 A JP H10208779A
Authority
JP
Japan
Prior art keywords
circuit
secondary battery
charging
battery
discharge
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
Application number
JP9012765A
Other languages
Japanese (ja)
Inventor
Hisashi Tsukamoto
寿 塚本
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Japan Storage Battery Co Ltd
Original Assignee
Japan Storage Battery Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Japan Storage Battery Co Ltd filed Critical Japan Storage Battery Co Ltd
Priority to JP9012765A priority Critical patent/JPH10208779A/en
Publication of JPH10208779A publication Critical patent/JPH10208779A/en
Pending legal-status Critical Current

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

  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)
  • Protection Of Static Devices (AREA)

Abstract

PROBLEM TO BE SOLVED: To suppress voltage decrease as much as possible at the time of discharging. SOLUTION: A circuit 15 exclusively for charging through which charging current Ic to a secondary battery 11 flows and a circuit 13 exclusively for discharging through which discharging current Id flows are installed. A FET 16 for preventing overcharging is installed at least in the circuit 15 exclusively for charging of them and the discharging current Id is made to run only in one FET 14 at the time of charging, so that the voltage decease due to the inner resistance of FET is lowered to a half as compared with that in a conventional battery. Consequently, since the discharging current does not flow in a switching element of the circuit exclusively for charging due to installation of the circuit exclusively for charging, vain voltage decrease by the switching element can be avoided and as a result, high output voltage can be reliably retained even in the case a secondary battery as same as a conventional one is used.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は二次電池を内蔵した
パック電池及び二次電池の保護回路に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery pack containing a secondary battery and a protection circuit for the secondary battery.

【０００２】[0002]

【従来の技術】例えばリチウムイオン電池とその保護回
路とを内蔵したパック電池として図３に示す構成が公知
である。これは、二次電池１の例えば陽極側通電路にＰ
ＴＣ２を設けるとともに、陰極側通電路にＦＥＴ３，４
を設け、各ＦＥＴ３、４を制御回路５にてオンオフ制御
する構成である。2. Description of the Related Art For example, a configuration shown in FIG. 3 is known as a battery pack containing a lithium ion battery and a protection circuit therefor. This is because, for example, P
TC2 is provided, and the FET3, 4
And the control circuit 5 controls the FETs 3 and 4 to be turned on and off.

【０００３】この構成において、放電時にはＦＥＴ３，
４を通って放電電流Ｉd が流れ、二次電池１の端子電圧
が所定値を下回ると、これが制御回路５によって検出さ
れてＦＥＴ３がオフ状態にされることにより、過放電が
防止される。また、充電時には、ＦＥＴ３、４を通って
充電電流Ｉc が流れ、満充電となると、これが制御回路
５によって検出されてＦＥＴ４がオフ状態になって、過
充電が防止される。[0003] In this configuration, at the time of discharging, FET3,
When the terminal voltage of the secondary battery 1 falls below a predetermined value, the control circuit 5 detects this and the FET 3 is turned off, thereby preventing overdischarge. During charging, the charging current Ic flows through the FETs 3 and 4, and when the battery is fully charged, this is detected by the control circuit 5 and the FET 4 is turned off to prevent overcharging.

【０００４】[0004]

【発明が解決しようとする課題】ところで、例えば携帯
電話機の分野では、近年、ＧＳＭ方式と呼ばれるデジタ
ル通信方式が開発されている。この方式によると、電源
回路に約２Ａもの大きさのパルス電流が流れることにな
り、電源回路における電圧降下を無視できなくなってい
る。しかるに、上記した従来構造では、二次電池１から
２つのＦＥＴ３，４を通って放電電流Ｉd が流れるか
ら、各ＦＥＴ３，４の内部抵抗による電圧降下が大きく
なるという問題があった。By the way, in the field of portable telephones, for example, a digital communication system called GSM system has recently been developed. According to this method, a pulse current of about 2 A flows through the power supply circuit, and a voltage drop in the power supply circuit cannot be ignored. However, in the above-described conventional structure, since the discharge current Id flows from the secondary battery 1 through the two FETs 3 and 4, there is a problem that the voltage drop due to the internal resistance of each of the FETs 3 and 4 becomes large.

【０００５】本発明は上記事情に鑑みてなされたもの
で、従って、その目的は放電時の電圧降下をできるだけ
小さくすることができるパック電池及び二次電池の保護
回路を提供するところにある。SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a protection circuit for a battery pack and a secondary battery capable of minimizing a voltage drop during discharging.

【０００６】[0006]

【課題を解決するための手段】本発明のパック電池は、
ケース内に二次電池を収容してなり、その二次電池の充
放電回路にスイッチング素子を設けて二次電池を保護す
るようにしたものにおいて、二次電池への充電電流が流
れる充電専用回路と放電電流が流れる放電専用回路とを
設け、少なくとも前記充電専用回路にスイッチング素子
を設けたところに特徴を有する。The battery pack of the present invention comprises:
A dedicated charging circuit in which a secondary battery is housed in a case and a switching element is provided in the charging / discharging circuit of the secondary battery to protect the secondary battery, in which a charging current to the secondary battery flows. And a dedicated discharge circuit through which a discharge current flows, and at least a switching element is provided in the dedicated charge circuit.

【０００７】また、本発明に係る二次電池の保護回路
は、二次電池の充放電回路にスイッチング素子を設けて
二次電池を保護するものにおいて、前記二次電池への充
電電流が流れる充電専用回路と放電電流が流れる放電専
用回路とを設け、少なくとも前記充電専用回路にスイッ
チング素子を設けたところに特徴を有する。A secondary battery protection circuit according to the present invention includes a secondary battery charge / discharge circuit provided with a switching element to protect the secondary battery, wherein a charge current to the secondary battery flows. It is characterized in that a dedicated circuit and a dedicated discharge circuit through which a discharge current flows are provided, and at least a switching element is provided in the dedicated charge circuit.

【０００８】[0008]

【発明の作用及び効果】請求項１及び請求項２の発明に
よると、放電専用回路が設けられてその放電電流は充電
専用回路のスイッチング素子を流れないから、スイッチ
ング素子による無駄な電圧降下を避けることができ、従
って従来と同等な二次電池を使用しても大きな出力電圧
を確保することができる。According to the first and second aspects of the present invention, since a discharge-only circuit is provided and its discharge current does not flow through the switching element of the charging-only circuit, useless voltage drop by the switching element is avoided. Therefore, a large output voltage can be ensured even when a secondary battery equivalent to a conventional one is used.

【０００９】[0009]

【発明の実施の形態】BEST MODE FOR CARRYING OUT THE INVENTION

＜第１実施形態＞以下、本発明の第１実施形態について
図１を参照して説明する。図示しないパック内に例えば
リチウムイオン形の二次電池１１が収容されており、そ
のパックの側壁部には陽極共通端子１１Ａ，放電用陰極
端子１１Ｂ及び充電用陰極端子１１Ｃの３つの端子が設
けられている。陽極共通端子１１Ａと二次電池１１の陽
極との間にはＰＴＣ１２が配置され、過電流が流れたと
きに自己発熱による抵抗増大によって過電流を抑制する
機能がある。<First Embodiment> A first embodiment of the present invention will be described below with reference to FIG. A pack (not shown) contains, for example, a lithium ion secondary battery 11, and three side terminals of a common anode terminal 11A, a discharge cathode terminal 11B, and a charge cathode terminal 11C are provided on the side wall of the pack. ing. The PTC 12 is disposed between the anode common terminal 11A and the anode of the secondary battery 11, and has a function of suppressing overcurrent by increasing resistance due to self-heating when an overcurrent flows.

【００１０】一方、放電用陰極端子１１Ｂと二次電池１
１の陰極との間は放電専用回路１３となっており、ここ
に放電スイッチ１４が介在されている。この放電スイッ
チ１４は、例えばパワーＮチャンネルＭＯＳ−ＦＥＴに
より構成されており、そのソース端子が二次電池１１の
陰極に、ドレイン端子が放電用陰極端子１１Ｂにそれぞ
れ接続されている。なお、図中のダイオードＤ１はＦＥ
Ｔのソース・ドレイン間に存在するボディダイオード
（寄生ダイオード）を示す。On the other hand, the discharge cathode terminal 11B and the secondary battery 1
A discharge-only circuit 13 is provided between the first cathode and the first cathode, and a discharge switch 14 is interposed therebetween. The discharge switch 14 is composed of, for example, a power N-channel MOS-FET, and its source terminal is connected to the cathode of the secondary battery 11 and its drain terminal is connected to the discharge cathode terminal 11B. Note that the diode D1 in the figure is FE
2 shows a body diode (parasitic diode) existing between the source and drain of T.

【００１１】また、充電用陰極端子１１Ｃ二次電池１１
の陰極との間は充電専用回路１５となっており、ここに
充電スイッチ１６が介在されている。この充電スイッチ
１６もパワーＮチャンネルＭＯＳ−ＦＥＴにより構成さ
れていて、ドレイン端子が二次電池１１の陰極に、ソー
ス端子が充電用陰極端子１１Ｃにそれぞれ接続されてい
る。図中のダイオードＤ２もこのＦＥＴのソース・ドレ
イン間に存在するボディダイオード（寄生ダイオード）
である。A charging cathode terminal 11C and a secondary battery 11
A dedicated charging circuit 15 is provided between the negative electrode and the negative electrode, and a charging switch 16 is interposed here. The charging switch 16 is also formed of a power N-channel MOS-FET, and has a drain terminal connected to the cathode of the secondary battery 11 and a source terminal connected to the charging cathode terminal 11C. The diode D2 in the figure is also a body diode (parasitic diode) existing between the source and the drain of this FET.
It is.

【００１２】そして、上記放電スイッチ１４及び充電ス
イッチ１６をオンオフ制御するために、各ＦＥＴのゲー
ト端子が制御回路１７に接続されており、二次電池１１
の電池電圧が所定の過放電検出電圧まで低下すると放電
スイッチ１４をオン状態からオフ状態に切り換え、ま
た、電池電圧が所定の過充電検出電圧まで上昇すると充
電スイッチをオン状態からオフ状態に切り換えるように
している。The gate terminal of each FET is connected to a control circuit 17 to control the on / off of the discharge switch 14 and the charge switch 16.
When the battery voltage decreases to a predetermined overdischarge detection voltage, the discharge switch 14 is switched from the on state to the off state, and when the battery voltage increases to the predetermined overcharge detection voltage, the charge switch is switched from the on state to the off state. I have to.

【００１３】次に、本実施形態の作用を説明する。パッ
ク電池を充電するには、陽極共通端子１１Ａと充電用陰
極端子１１Ｃとの間に充電器２０の出力端子を接続す
る。すると、二次電池１１が満充電状態にない場合に
は、制御回路１７からのゲート信号によって充電スイッ
チ１６がオン状態になっているから、充電専用回路１５
を通って充電器２０の充電電流が流れ、二次電池１１の
充電が行われる。そして、二次電池１１が満充電状態に
なると、これが制御回路１７によって検出され、充電ス
イッチ１６が開放されて過充電が防止される。Next, the operation of this embodiment will be described. To charge the battery pack, the output terminal of the charger 20 is connected between the common anode terminal 11A and the charging cathode terminal 11C. Then, when the secondary battery 11 is not in the fully charged state, the charge switch 16 is turned on by the gate signal from the control circuit 17, so that the charge dedicated circuit 15
, A charging current of the charger 20 flows, and the secondary battery 11 is charged. When the secondary battery 11 is fully charged, this is detected by the control circuit 17, and the charge switch 16 is opened to prevent overcharging.

【００１４】また、負荷３０は陽極共通端子１１Ａと放
電用陰極端子１１Ｂとの間に接続される。二次電池１１
の電池電圧が過放電検出電圧を越えている場合には、放
電専用回路１３の放電スイッチ１４はオン状態にあるか
ら、放電専用回路１３を通して負荷電流が流れる。この
ように、負荷電流は二次電池１１の陽極側共通回路と放
電専用回路１３を流れ、図３に示した従来構成のように
放電時に２つのＦＥＴを直列に流れることがなく、１つ
のＦＥＴ（放電スイッチ１４）のみを流れることにな
る。この結果、ＦＥＴの内部抵抗に起因する電圧降下が
生ずるとしても、それは従来の半分の値に抑えることが
できる。このことは、例えば大きなパルス電流が流れる
ＧＳＭ方式のデジタル携帯電話であっても、電圧降下を
効果的に抑えることができることを意味するので、同一
容量の二次電池１１から従来よりも多くの電力を取り出
すことができるようになる。The load 30 is connected between the common anode terminal 11A and the discharge cathode terminal 11B. Secondary battery 11
When the battery voltage exceeds the overdischarge detection voltage, the discharge switch 14 of the dedicated discharge circuit 13 is in the ON state, so that the load current flows through the dedicated discharge circuit 13. As described above, the load current flows through the common circuit on the anode side of the secondary battery 11 and the dedicated discharge circuit 13, and does not flow through two FETs in series at the time of discharging unlike the conventional configuration shown in FIG. (Discharge switch 14) only. As a result, even if a voltage drop due to the internal resistance of the FET occurs, it can be suppressed to a half of the conventional value. This means, for example, that even in a GSM digital mobile phone in which a large pulse current flows, a voltage drop can be effectively suppressed. Can be taken out.

【００１５】＜第２実施形態＞<Second Embodiment>

【００１６】図２は本発明の第２実施形態を示す。前記
第１実施形態と相違するところは、二次電池１１として
過放電によって損傷を受けないタイプのものを使用し、
放電専用回路１３から放電スイッチ１４を省略したもの
である。その他の構成要素は、前記第１実施形態と同様
であり、同一部分に同一符号を付して重複する説明を省
略する。FIG. 2 shows a second embodiment of the present invention. The difference from the first embodiment is that the secondary battery 11 uses a type that is not damaged by overdischarge,
The discharge switch 14 is omitted from the discharge circuit 13. The other components are the same as those in the first embodiment, and the same portions are denoted by the same reference numerals and overlapping description will be omitted.

【００１７】上記構成によれば、放電専用回路１３に放
電スイッチ１４もないから、放電時の電圧降下を一層低
く抑えることができるという効果が得られる。しかも、
ＦＥＴが１つで済むから、電池パックの部品コストや組
立コストを引き下げて安価かつ軽量に製造することがで
きるという効果も得られる。According to the above configuration, the discharge switch 14 is not provided in the dedicated discharge circuit 13, so that the voltage drop at the time of discharge can be further suppressed. Moreover,
Since only one FET is required, there is also obtained an effect that the parts cost and the assembly cost of the battery pack can be reduced and the battery pack can be manufactured inexpensively and lightly.

【００１８】＜他の実施形態＞<Other Embodiments>

【００１９】本発明は上記記述及び図面によって説明し
た実施の形態に限定されるものではなく、例えば次のよ
うな実施の形態も本発明の技術的範囲に含まれ、さら
に、下記以外にも要旨を逸脱しない範囲内で種々変更し
て実施することができる。The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention. Various changes can be made without departing from the scope of the present invention.

【００２０】（１）上記各実施形態では機器本体から取
り外し可能に構成されたパック電池に適用した例を示し
たが、これに限らず、二次電池が機器本体に取り外し不
能に内蔵されている構成に本発明の保護回路を適用する
こともできる。この場合には、図１又は図２において、
負荷３０が陽極共通端子１１Ａ及び放電用陰極端子１１
Ｂに直結された状態にあり、充電器２０が端子１１Ａ，
１１Ｃに接続される。また、機器本体に充電器２０も内
蔵する場合には、常に各端子１１Ａ，１１Ｂ，１１Ｃに
負荷３０及び充電器２０を直結した状態としておけばよ
く、いずれにしても前記各実施形態と同様な効果が得ら
れる。(1) In each of the above embodiments, an example is shown in which the present invention is applied to a battery pack that is configured to be detachable from the device body. However, the present invention is not limited to this, and a secondary battery is irremovably built into the device body. The protection circuit of the present invention can be applied to the configuration. In this case, in FIG. 1 or FIG.
The load 30 is composed of the anode common terminal 11A and the discharge cathode terminal 11
B, and the charger 20 is connected to the terminals 11A,
11C. When the charger 20 is also built in the device body, the load 30 and the charger 20 may be always directly connected to the terminals 11A, 11B, and 11C. The effect is obtained.

【００２１】（２）上記各実施形態では、過電流保護の
ためにＰＴＣ１２を設けているが、これに限らず、電流
ヒューズや温度ヒューズ等の他の過電流保護素子を使用
してもよく、また、端子間短絡の可能性が少ない場合に
は、上記過電流保護素子を省略することもできる。(2) In each of the above embodiments, the PTC 12 is provided for overcurrent protection. However, the present invention is not limited to this, and another overcurrent protection element such as a current fuse or a temperature fuse may be used. When the possibility of short-circuit between terminals is small, the overcurrent protection element can be omitted.

【００２２】（３）上記各実施形態では、二次電池１１
としてリチウムイオン形のものを例示したが、これに限
らず、ニッケルカドミウム形やニッケル水素形のもので
あってもよく、またスイッチング素子としてＦＥＴ以外
の素子を使用できることは勿論である。(3) In the above embodiments, the secondary battery 11
However, the present invention is not limited to this. For example, a nickel cadmium type or a nickel hydride type may be used, and an element other than the FET can be used as a switching element.

【図面の簡単な説明】[Brief description of the drawings]

【図１】本発明の第１実施形態を示す回路図FIG. 1 is a circuit diagram showing a first embodiment of the present invention.

【図２】本発明の第２実施形態を示す回路図FIG. 2 is a circuit diagram showing a second embodiment of the present invention.

【図３】従来の保護回路を示す回路図FIG. 3 is a circuit diagram showing a conventional protection circuit.

【符号の説明】[Explanation of symbols]

１１…二次電池 １３…放電専用回路 １４…放電スイッチ １５…充電専用回路 １６…充電スイッチ １７…制御回路 ２０…充電器 ３０…負荷 DESCRIPTION OF SYMBOLS 11 ... Secondary battery 13 ... Discharge circuit 14 ... Discharge switch 15 ... Charge circuit 16 ... Charge switch 17 ... Control circuit 20 ... Charger 30 ... Load

Claims (2)

【特許請求の範囲】[Claims] 【請求項１】 ケース内に二次電池を収容してなり、そ
の二次電池の充放電回路にスイッチング素子を設けて前
記二次電池を保護するようにしたパック電池において、
前記二次電池への充電電流が流れる充電専用回路と放電
電流が流れる放電専用回路とを設け、少なくとも充電専
用回路に前記スイッチング素子を設けたことを特徴とす
るパック電池。1. A battery pack in which a secondary battery is housed in a case and a switching element is provided in a charge / discharge circuit of the secondary battery to protect the secondary battery.
A battery pack comprising: a dedicated charging circuit through which a charging current flows to the secondary battery; and a dedicated discharging circuit through which a discharging current flows, and at least the switching element is provided in at least the dedicated charging circuit. 【請求項２】 二次電池の充放電回路にスイッチング素
子を設けて二次電池を保護するものにおいて、前記二次
電池への充電電流が流れる充電専用回路と放電電流が流
れる放電専用回路とを設け、少なくとも前記充電専用回
路に前記スイッチング素子を設けたことを特徴とする二
次電池の保護回路。2. A method for protecting a secondary battery by providing a switching element in a charging / discharging circuit of the secondary battery, wherein a dedicated charging circuit through which a charging current flows to the secondary battery and a dedicated discharging circuit through which a discharging current flows. A protection circuit for a secondary battery, wherein the switching element is provided at least in the dedicated charging circuit.
JP9012765A 1997-01-27 1997-01-27 Protective circuit for pack battery and secondary battery Pending JPH10208779A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9012765A JPH10208779A (en) 1997-01-27 1997-01-27 Protective circuit for pack battery and secondary battery

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9012765A JPH10208779A (en) 1997-01-27 1997-01-27 Protective circuit for pack battery and secondary battery

Publications (1)

Publication Number Publication Date
JPH10208779A true JPH10208779A (en) 1998-08-07

Family

ID=11814505

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9012765A Pending JPH10208779A (en) 1997-01-27 1997-01-27 Protective circuit for pack battery and secondary battery

Country Status (1)

Country Link
JP (1) JPH10208779A (en)

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JP2000060009A (en) * 1998-08-10 2000-02-25 Sony Corp Portable electronic apparatus
JP2000134804A (en) * 1998-10-27 2000-05-12 Nec Corp Charge/discharge switching circuit
JP2001217012A (en) * 2000-02-07 2001-08-10 Nec Mobile Energy Kk Battery pack
JP2002017050A (en) * 2000-06-29 2002-01-18 Matsushita Electric Ind Co Ltd Charging circuit of secondary battery
JP2002208443A (en) * 2001-01-11 2002-07-26 Sanyo Electric Co Ltd Battery pack
JP2002540756A (en) * 1999-03-25 2002-11-26 タイコ・エレクトロニクス・コーポレイション Apparatus and method for protection of rechargeable devices
JP2003109673A (en) * 2001-09-28 2003-04-11 Nec Mobile Energy Kk Battery pack with warning function
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JP2000060009A (en) * 1998-08-10 2000-02-25 Sony Corp Portable electronic apparatus
JP2000134804A (en) * 1998-10-27 2000-05-12 Nec Corp Charge/discharge switching circuit
JP2002540756A (en) * 1999-03-25 2002-11-26 タイコ・エレクトロニクス・コーポレイション Apparatus and method for protection of rechargeable devices
JP2001217012A (en) * 2000-02-07 2001-08-10 Nec Mobile Energy Kk Battery pack
JP2002017050A (en) * 2000-06-29 2002-01-18 Matsushita Electric Ind Co Ltd Charging circuit of secondary battery
JP2002208443A (en) * 2001-01-11 2002-07-26 Sanyo Electric Co Ltd Battery pack
JP2003109673A (en) * 2001-09-28 2003-04-11 Nec Mobile Energy Kk Battery pack with warning function
JP2007299696A (en) * 2006-05-02 2007-11-15 Sanyo Electric Co Ltd Secondary battery device
JP2013084624A (en) * 2007-02-09 2013-05-09 Cymbet Corp Charging system and charging method
JP2011176939A (en) * 2010-02-24 2011-09-08 Seiko Epson Corp Protecting circuit and electronic apparatus
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JP2011176940A (en) * 2010-02-24 2011-09-08 Seiko Epson Corp Protection circuit and electronic apparatus
WO2012147598A1 (en) * 2011-04-27 2012-11-01 ソニーケミカル＆インフォメーションデバイス株式会社 Charging/discharging control device, battery pack, electrical equipment, and charging/discharging control method
JP2012231649A (en) * 2011-04-27 2012-11-22 Sony Chemical & Information Device Corp Charge/discharge controller, battery pack, electric apparatus, and charge/discharge control method
US9130383B2 (en) 2011-04-27 2015-09-08 Dexerials Corporation Charging/discharging control device, battery pack, electrical equipment, and charging/discharging control method
KR101381847B1 (en) * 2012-07-04 2014-04-10 주식회사 이랜텍 Battery pack for electric bicycle
JP2019528672A (en) * 2016-08-29 2019-10-10 インテグレーテッド・デバイス・テクノロジー・インコーポレーテッド Circuits and systems for low power magnetic secure transmission
US10797493B2 (en) 2016-09-20 2020-10-06 Huawei Technologies Co., Ltd. Battery, terminal, and charging system
JP2019530413A (en) * 2016-09-20 2019-10-17 華為技術有限公司Ｈｕａｗｅｉ Ｔｅｃｈｎｏｌｏｇｉｅｓ Ｃｏ．，Ｌｔｄ． Battery, terminal, and charging system
US11444470B2 (en) 2016-09-20 2022-09-13 Huawei Technologies Co., Ltd. Battery, terminal, and charging system
US11962176B2 (en) 2016-09-20 2024-04-16 Huawei Technologies Co., Ltd. Battery, terminal, and charging system
JP2018157666A (en) * 2017-03-16 2018-10-04 エイブリック株式会社 Charge and discharge control circuit and battery device
JP2022001012A (en) * 2020-06-17 2022-01-04 ショット日本株式会社 Protection circuit

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