JP2015165735A - battery module - Google Patents

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JP2015165735A
JP2015165735A JP2014039967A JP2014039967A JP2015165735A JP 2015165735 A JP2015165735 A JP 2015165735A JP 2014039967 A JP2014039967 A JP 2014039967A JP 2014039967 A JP2014039967 A JP 2014039967A JP 2015165735 A JP2015165735 A JP 2015165735A
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secondary battery
battery module
fuse
opening
secondary batteries
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JP6291287B2 (en
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門田　行生
Yukio Kadota
行生 門田
久保田　雅之
Masayuki Kubota
雅之 久保田
孝司 森本
Koji Morimoto
孝司 森本
正博 戸原
Masahiro Tohara
正博 戸原
麻美 水谷
Asami Mizutani
麻美 水谷
小林　武則
Takenori Kobayashi
武則 小林
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Toshiba Corp
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Toshiba Corp
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    • 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

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  • Protection Of Static Devices (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a battery module capable of preventing or reducing deterioration or breakage of secondary batteries due to overcharge.SOLUTION: The battery module includes: plural secondary batteries which are electrically connected to each other in series; a fuse which is electrically connected thereto in series; voltage detection means that detects a voltage causing an overcharge of the plural secondary batteries; and opening/closing means which is configured to be connected to flow the current from the plural secondary batteries when getting in a closed state, and when the voltage detection means detects an overvoltage, to get into a closed state. When an overcharge occurs on the secondary batteries, the current from the secondary batteries is controlled to flow to the fuse via the opening/closing means to brow the fuse.

Description

本発明は充電可能な複数の電池を組合せて構成された電池モジュールに関する。   The present invention relates to a battery module configured by combining a plurality of rechargeable batteries.

従来より、充電可能な二次電池は、パーソナルコンピュータや家庭用ビデオカメラ、可搬式オーディオ機器等数多くの電気製品に使用されてきた。これらの機器に使用される充電可能な二次電池は、電圧を上昇させるために直列に接続され、容量を増やすために並列に接続され一つのパッケージに収納され電池モジュールを構成している。 Conventionally, rechargeable secondary batteries have been used in many electrical products such as personal computers, home video cameras, and portable audio devices. The rechargeable secondary batteries used in these devices are connected in series to increase the voltage, and connected in parallel to increase the capacity and housed in one package to constitute a battery module.

これらの電池モジュールは、電池短絡時に溶断する電流ヒューズを電池モジュール内部に具備している。（例えば特許文献１） These battery modules include a current fuse that melts when the battery is short-circuited. (For example, Patent Document 1)

特開２０１０−２７２６１号公報（第７頁、図１）Japanese Patent Laying-Open No. 2010-27261 (page 7, FIG. 1)

パーソナルコンピュータや家庭用ビデオカメラ、可搬式オーディオ機器等の電気製品に使用される充電可能な二次電池は、多くの場合直流５Ｖや１２Ｖの比較的低い出力電圧を有するものであった。しかし近年、交流１００Ｖや２００Ｖまたはそれ以上の交流電源発生用に充電可能な二次電池が使用されるようになってきた。また電気自動車や、ハイブリッド自動車の電源としても充電可能な二次電池が使用されるようになってきた。これらの機器に使用される二次電池は、高い出力電圧が必要とされ、多数の充電可能な二次電池が、直列および並列に接続され電池モジュールを構成している。 Rechargeable secondary batteries used in electrical products such as personal computers, home video cameras, and portable audio devices often have a relatively low output voltage of DC 5V or 12V. However, in recent years, rechargeable secondary batteries have been used to generate AC power of AC 100V, 200V or higher. In addition, rechargeable secondary batteries have been used as power sources for electric vehicles and hybrid vehicles. Secondary batteries used in these devices require a high output voltage, and a large number of rechargeable secondary batteries are connected in series and in parallel to form a battery module.

多数の直列、並列に接続された充電可能な二次電池を充電する場合、電池モジュールを構成する充電可能な二次電池の充電が同時に完了するわけではない。電池モジュール全体として充電を行った場合、一部の二次電池の充電が完了している状態で、残りの二次電池の充電が継続されてしまう場合がある。この場合、二次電池が過充電となり、発熱を伴い大変危険である。昨今、電池モジュール内部に短絡電流等の過電流発生時に溶断するヒューズが設けられている場合が多いが、当該ヒューズは二次電池の過充電時には機能せず、過充電時に充電電流を遮断する保護手段は設けられていなかった。 When charging a large number of rechargeable secondary batteries connected in series and in parallel, charging of the rechargeable secondary batteries constituting the battery module is not completed simultaneously. When the battery module as a whole is charged, charging of the remaining secondary batteries may be continued in a state where charging of some of the secondary batteries is completed. In this case, the secondary battery is overcharged and is very dangerous with heat generation. Recently, there are many cases where a fuse that blows when an overcurrent such as a short-circuit current occurs is provided inside the battery module. However, the fuse does not function when the secondary battery is overcharged, and it protects the charging current when it is overcharged. No means were provided.

本発明は、二次電池の過充電による破壊や劣化を防止または軽減することができる電池モジュールを提供することを目的とする。 An object of this invention is to provide the battery module which can prevent or reduce the destruction and deterioration by the overcharge of a secondary battery.

上記目的を達成するために、本発明による電池モジュールは、電気的に直列に接続された複数の二次電池と、前記複数の二次電池に電気的に直列に接続されたヒューズと、前記複数の二次電池に接続され、過充電にかかる電圧を検出する電圧検出手段と、閉状態となった時に、前記複数の二次電池からの電流を前記ヒューズに流すように接続され、前記電圧検出手段により過電圧が検出された場合に、閉状態となるように制御される開閉手段とを具備したことを特徴とする。 In order to achieve the above object, a battery module according to the present invention includes a plurality of secondary batteries electrically connected in series, a fuse electrically connected in series to the plurality of secondary batteries, and the plurality of batteries. A voltage detecting means for detecting a voltage applied to the overcharge, and connected to flow current from the plurality of secondary batteries to the fuse when in a closed state, and the voltage detection And an opening / closing means that is controlled to be in a closed state when an overvoltage is detected by the means.

本発明によれば、二次電池の過充電による劣化や破壊を防止または軽減することができる電池モジュールを提供することができる。 ADVANTAGE OF THE INVENTION According to this invention, the battery module which can prevent or reduce the deterioration and destruction by the overcharge of a secondary battery can be provided.

実施例１にかかる電池モジュールの構成を示す図The figure which shows the structure of the battery module concerning Example 1. FIG. 実施例２にかかる電池モジュールの構成を示す図The figure which shows the structure of the battery module concerning Example 2. FIG. 実施例３にかかる電池モジュールの構成を示す図The figure which shows the structure of the battery module concerning Example 3. 実施例４にかかる電池モジュールの構成を示す図The figure which shows the structure of the battery module concerning Example 4. FIG. 実施例４にかかる電池モジュールの変形例を示す図The figure which shows the modification of the battery module concerning Example 4. FIG.

以下、本発明の実施例を説明する。   Examples of the present invention will be described below.

本発明による電池モジュールの実施例１につき、図１を参照して説明する。図１は本発明による電池モジュールの実施例１を示す構成図である。実施例１の電池モジュールは、端子１０１、端子１０２、二次電池１０３、二次電池１０４、電流ヒューズ１０５、電圧検出部１０６、電圧検出部１０７、駆動部１０８、開閉部１０９により構成されている。   Example 1 of a battery module according to the present invention will be described with reference to FIG. FIG. 1 is a configuration diagram showing Example 1 of a battery module according to the present invention. The battery module according to the first embodiment includes a terminal 101, a terminal 102, a secondary battery 103, a secondary battery 104, a current fuse 105, a voltage detection unit 106, a voltage detection unit 107, a drive unit 108, and an opening / closing unit 109. .

端子１０１、端子１０２は、銅等の金属により端子やプリント基板上のコネクタとしてからなる電気接点として構成されており、電池モジュール１００と外部回路との電気的接続を行う。端子１０１は電池モジュール１００の正極端子を、端子１０２は電池モジュール１００の負極端子を構成している。   The terminals 101 and 102 are configured as electrical contacts made of a metal such as copper as a terminal or a connector on a printed circuit board, and make electrical connection between the battery module 100 and an external circuit. The terminal 101 constitutes the positive terminal of the battery module 100, and the terminal 102 constitutes the negative terminal of the battery module 100.

二次電池１０３、二次電池１０４は、リチウム二次電池やニッカド電池のような充電可能な電池であり、一個もしくは少数の電池が直列または並列に接続され構成されている。二次電池１０３と二次電池１０４は、後述するヒューズ１０５を介し直列に電気的に接続されている。また、二次電池１０３の正極は端子１０１に、二次電池１０４の負極は端子１０２に接続されている。   The secondary battery 103 and the secondary battery 104 are rechargeable batteries such as a lithium secondary battery and a nickel cadmium battery, and one or a few batteries are connected in series or in parallel. The secondary battery 103 and the secondary battery 104 are electrically connected in series via a fuse 105 described later. The positive electrode of the secondary battery 103 is connected to the terminal 101, and the negative electrode of the secondary battery 104 is connected to the terminal 102.

ヒューズ１０５は、高温の温度により溶解する特性を有する金属により構成されており、二次電池１０３と二次電池１０４の間に直列に接続されている。ヒューズ１０５は、二次電池１０３及び二次電池１０４に過電流が流された場合、その電流により発生される温度により溶解し、二次電池１０３、二次電池１０４の電気的接続を断つ。なお、ヒューズ１０５は、二次電池１０３と二次電池１０４と電気的に直列に接続されていればよく、二次電池１０３と二次電池１０４の間に配置されていなくてもよい。   The fuse 105 is made of a metal that has a characteristic of melting at a high temperature, and is connected in series between the secondary battery 103 and the secondary battery 104. When an overcurrent is passed through the secondary battery 103 and the secondary battery 104, the fuse 105 melts due to the temperature generated by the current, and disconnects the electrical connection between the secondary battery 103 and the secondary battery 104. Note that the fuse 105 only needs to be electrically connected in series with the secondary battery 103 and the secondary battery 104, and may not be disposed between the secondary battery 103 and the secondary battery 104.

電圧検出部１０６、電圧検出部１０７は電圧コンパレータ回路等により構成されており、電圧検出部１０６は二次電池１０３の電圧が、電圧検出部１０７は二次電池１０４の電圧が、設定された一定の電圧より高くなった場合、検出信号を送出する。   The voltage detection unit 106 and the voltage detection unit 107 are configured by a voltage comparator circuit or the like. The voltage detection unit 106 is set to the voltage of the secondary battery 103, and the voltage detection unit 107 is set to the voltage of the secondary battery 104. When the voltage becomes higher than the detection voltage, a detection signal is transmitted.

駆動部１０８は、電圧検出部１０６または電圧検出部１０７から出力された電圧検出信号を受信し、後述する開閉部１０９を閉とするように制御を行う。   The drive unit 108 receives the voltage detection signal output from the voltage detection unit 106 or the voltage detection unit 107, and performs control to close an opening / closing unit 109 described later.

開閉部１０９は電流を遮断・導通するＦＥＴ等の半導体からなるスイッチやリレー回路により構成されており、駆動部１０９からの制御信号により、開閉を制御される。   The opening / closing unit 109 is configured by a switch or a relay circuit made of a semiconductor such as an FET that cuts off / conducts current, and the opening / closing is controlled by a control signal from the driving unit 109.

次に、本実施例の動作について図１を参照しつつ説明する。 Next, the operation of this embodiment will be described with reference to FIG.

図１における二次電池１０３並びに二次電池１０４は、製造時の個体差や、経年劣化状況の差、残存蓄電容量の差等のため、充電可能な電荷量が異なる。二次電池１０３並びに二次電池１０４は電気的に直列に接続されており、当該電池を充電する場合は、外部電源の正極側を端子１０１に、外部電源の負極側を端子１０２に接続し、ヒューズ１０５を介し直列接続された二次電池１０３、二次電池１０４を同時に充電する。しかしながら、二次電池１０３並びに二次電池１０４の充電可能な容量は、前述の原因により必ずしも同等ではない。 The secondary battery 103 and the secondary battery 104 in FIG. 1 have different charge amounts that can be charged due to individual differences at the time of manufacture, differences in deterioration over time, differences in remaining storage capacity, and the like. The secondary battery 103 and the secondary battery 104 are electrically connected in series. When charging the battery, the positive side of the external power source is connected to the terminal 101, the negative side of the external power source is connected to the terminal 102, The secondary battery 103 and the secondary battery 104 connected in series via the fuse 105 are simultaneously charged. However, the rechargeable capacities of the secondary battery 103 and the secondary battery 104 are not necessarily equal due to the above-described causes.

従って、直列接続された二次電池１０３並びに二次電池１０４の充電を行った場合、一方の二次電池の充電が他方の二次電池の充電より早く完了することになる。例えば二次電池１０３の充電できる電荷容量が二次電池１０４に比べ少ない場合、二次電池１０３の充電は、二次電池１０４の充電より早く完了する。 Therefore, when the secondary battery 103 and the secondary battery 104 connected in series are charged, the charging of one secondary battery is completed earlier than the charging of the other secondary battery. For example, when the charge capacity of the secondary battery 103 that can be charged is smaller than that of the secondary battery 104, the charging of the secondary battery 103 is completed earlier than the charging of the secondary battery 104.

ここで二次電池１０３の充電が完了したにもかかわらず、二次電池１０４の充電が完了していない場合、電池モジュール１００全体としての充電が完了していないと判断され、端子１０１、端子１０２を用い充電電流が継続して供給された場合、二次電池１０３は過充電となり発熱し危険である。ヒューズ１０５が設けられているが、ヒューズ１０５は過電流による発熱により溶断する機能を有するが、二次電池１０３が過充電となっても、過電流は流れないためヒューズ１０５自体は発熱せず、ヒューズ１０５は溶断しない。 Here, when the charging of the secondary battery 103 is completed but the charging of the secondary battery 104 is not completed, it is determined that the charging of the battery module 100 as a whole has not been completed, and the terminal 101 and the terminal 102 are determined. If the charging current is continuously supplied using the battery, the secondary battery 103 becomes overcharged and generates heat, which is dangerous. Although the fuse 105 is provided, the fuse 105 has a function of being blown by heat generation due to overcurrent. However, even if the secondary battery 103 is overcharged, overcurrent does not flow, so the fuse 105 itself does not generate heat, The fuse 105 is not melted.

二次電池１０３並びに二次電池１０４には、二次電池の両極間の電圧を検出する電圧検出部１０６並びに電圧検出部１０７がそれぞれ設けられている。 The secondary battery 103 and the secondary battery 104 are respectively provided with a voltage detection unit 106 and a voltage detection unit 107 that detect a voltage between both electrodes of the secondary battery.

過充電となった二次電池１０３は、電圧が上昇する。電圧検出部１０６は予め設定された一定の電圧より二次電池１０３の電圧が上昇したことを検出し、検出信号を駆動部１０８に出力する。 The voltage of the secondary battery 103 that is overcharged rises. The voltage detection unit 106 detects that the voltage of the secondary battery 103 has risen from a preset constant voltage, and outputs a detection signal to the drive unit 108.

当該検出信号を受信した駆動部１０８は、開閉部１０９を閉状態とするように開閉部１０９を制御する。 The drive unit 108 that has received the detection signal controls the opening / closing unit 109 so that the opening / closing unit 109 is closed.

開閉部１０９が閉状態になると、ヒューズ１０５を介し直列に接続された二次電池１０３並びに二次電池１０４は、開閉部１０９を介し電流を放電する。当該電流は、ヒューズ１０５にも流れる。当該電流は大きな電流となるため、ヒューズ１０５は発熱し溶断する。その結果、二次電池１０３と二次電池１０４の電気的な直列接続は切断され、二次電池１０３並びに二次電池１０４への充電は中断される。このようにして、二次電池１０３並びに二次電池１０４は過充電による劣化や破壊から守られる。 When the open / close unit 109 is closed, the secondary battery 103 and the secondary battery 104 connected in series via the fuse 105 discharge current through the open / close unit 109. The current also flows through the fuse 105. Since the current becomes a large current, the fuse 105 generates heat and blows. As a result, the electrical series connection between the secondary battery 103 and the secondary battery 104 is disconnected, and charging of the secondary battery 103 and the secondary battery 104 is interrupted. In this way, the secondary battery 103 and the secondary battery 104 are protected from deterioration and destruction due to overcharging.

本実施例によれば、二次電池の過充電による破壊や劣化を防止または軽減することができる電池モジュールを提供することができる。 According to the present embodiment, it is possible to provide a battery module that can prevent or reduce destruction and deterioration due to overcharging of the secondary battery.

本実施例を用いれば、電池モジュール内部の二次電池が過充電となった場合に、開閉部１０９が閉状態となり電流が流れ、同時にヒューズ１０５にも電流が流れヒューズ１０５が発熱し溶断するため、充電電流が遮断され二次電池への過充電を停止することができる。 According to this embodiment, when the secondary battery in the battery module is overcharged, the opening / closing part 109 is closed and a current flows. At the same time, a current flows through the fuse 105, and the fuse 105 generates heat and blows. The charging current is cut off, and overcharging to the secondary battery can be stopped.

以上のように本発明を用いれば、二次電池の過充電による破壊や劣化を防止または軽減することができる電池モジュールを提供することができる。 As described above, by using the present invention, it is possible to provide a battery module that can prevent or reduce damage and deterioration due to overcharging of a secondary battery.

本発明による電池モジュールの実施例２について図２を参照して説明する。なお、この実施例２の各部について図１に示す実施例１の電池モジュールの各部と同一部分は同一符号で示す。
この実施例２が実施例１と相違する点は、実施例１では開閉部１０９が、二次電池１０３の正極と二次電池１０４の負極に直接接続されていたのに対し、実施例２では、開閉部１０９が抵抗器２０１を介して、二次電池１０３の正極と二次電池１０４の負極に接続されている点である。 Embodiment 2 of the battery module according to the present invention will be described with reference to FIG. In addition, about each part of this Example 2, the same part as each part of the battery module of Example 1 shown in FIG. 1 is shown with the same code | symbol.
The difference between the second embodiment and the first embodiment is that, in the first embodiment, the opening / closing portion 109 is directly connected to the positive electrode of the secondary battery 103 and the negative electrode of the secondary battery 104, whereas in the second embodiment, The open / close unit 109 is connected to the positive electrode of the secondary battery 103 and the negative electrode of the secondary battery 104 via the resistor 201.

本実施例のヒューズ１０５の溶断に至るまでの動作は実施例１と同様である。 The operation until the fuse 105 of this embodiment is blown is the same as that of the first embodiment.

抵抗器２０１は、開閉部１０９が閉状態となった場合に、開閉機１０９に流れる電流を制限する。これにより、二次電池１０３、二次電池１０４、開閉部１０９を過大な電流から保護することが可能である。 The resistor 201 limits the current flowing through the switch 109 when the switch 109 is in a closed state. Thereby, it is possible to protect the secondary battery 103, the secondary battery 104, and the opening / closing part 109 from an excessive current.

なお、抵抗器２０１の抵抗値は、二次電池１０４、ヒューズ１０５、二次電池１０３、開閉部１０９、抵抗器２０１からなる回路に流れる電流にて、ヒューズ１０５が溶断するような電流値となるようにあらかじめ設定されるものとする。 Note that the resistance value of the resistor 201 is such that the fuse 105 is blown by the current flowing through the circuit including the secondary battery 104, the fuse 105, the secondary battery 103, the switching unit 109, and the resistor 201. It shall be set in advance as follows.

本実施例によれば、二次電池の過充電による破壊や劣化を防止または軽減することができる電池モジュールを提供することができる。 According to the present embodiment, it is possible to provide a battery module that can prevent or reduce destruction and deterioration due to overcharging of the secondary battery.

本実施例を用いれば、電池モジュール内部の二次電池が過充電となった場合に、開閉部１０９が閉状態となり電流が流れ、同時にヒューズ１０５にも電流が流れヒューズ１０５が発熱し溶断するため、充電電流が遮断され二次電池への過充電を停止することができる。 According to this embodiment, when the secondary battery in the battery module is overcharged, the opening / closing part 109 is closed and current flows, and at the same time, current also flows through the fuse 105, causing the fuse 105 to generate heat and blow. The charging current is cut off, and overcharging to the secondary battery can be stopped.

本実施例を用いれば、開閉部１０９が閉状態となった場合に、開閉部１０９に流れる電流が制限される。これにより、二次電池１０３、二次電池１０４、開閉部１０９は過大な電流から保護されることが可能となる。 By using this embodiment, when the opening / closing part 109 is closed, the current flowing through the opening / closing part 109 is limited. Thereby, the secondary battery 103, the secondary battery 104, and the opening / closing part 109 can be protected from an excessive current.

以上のように本発明を用いれば、二次電池の過充電による破壊や劣化を防止または軽減することができる電池モジュールを提供することができる。 As described above, by using the present invention, it is possible to provide a battery module that can prevent or reduce damage and deterioration due to overcharging of a secondary battery.

本発明による電池モジュールの実施例３について図３を参照して説明する。なお、この実施例３の各部について図１に示す実施例１の電池モジュールの各部と同一部分は同一符号で示す。
この実施例３が実施例１と相違する点は、実施例１では開閉部１０９が、二次電池１０３の正極と二次電池１０４の負極に直接接続されていたのに対し、実施例３では、開閉部１０９がリアクトル３０１を介して、二次電池１０３の正極と二次電池１０４の負極に接続されている点である。 Embodiment 3 of the battery module according to the present invention will be described with reference to FIG. In addition, about each part of this Example 3, the same part as each part of the battery module of Example 1 shown in FIG. 1 is shown with the same code | symbol.
The difference between the third embodiment and the first embodiment is that in the first embodiment, the opening / closing part 109 is directly connected to the positive electrode of the secondary battery 103 and the negative electrode of the secondary battery 104, whereas in the third embodiment, The open / close unit 109 is connected to the positive electrode of the secondary battery 103 and the negative electrode of the secondary battery 104 via the reactor 301.

本実施例のヒューズ１０５の溶断に至るまでの動作は実施例１と同様である。 The operation until the fuse 105 of this embodiment is blown is the same as that of the first embodiment.

リアクトル３０１は、開閉部１０９が閉状態となった場合に、開閉機１０９に流れる突入電流を制限する。これにより、二次電池１０３、二次電池１０４、開閉部１０９を過大な突入電流から保護することが可能である。 The reactor 301 limits the inrush current flowing through the opening / closing device 109 when the opening / closing unit 109 is closed. Thereby, it is possible to protect the secondary battery 103, the secondary battery 104, and the opening / closing part 109 from an excessive inrush current.

本実施例によれば、二次電池の過充電による破壊や劣化を防止または軽減することができる電池モジュールを提供することができる。 According to the present embodiment, it is possible to provide a battery module that can prevent or reduce destruction and deterioration due to overcharging of the secondary battery.

本実施例を用いれば、電池モジュール内部の二次電池が過充電となった場合に、開閉部１０９が閉状態となり電流が流れ、同時にヒューズ１０５にも電流が流れヒューズ１０５が発熱し溶断するため、充電電流が遮断され二次電池への過充電を停止することができる。 According to this embodiment, when the secondary battery in the battery module is overcharged, the opening / closing part 109 is closed and a current flows. At the same time, a current flows through the fuse 105, and the fuse 105 generates heat and blows. The charging current is cut off, and overcharging to the secondary battery can be stopped.

本実施例を用いれば、開閉部１０９が閉状態となった場合に、開閉部１０９に流れる突入電流が制限される。これにより、二次電池１０３、二次電池１０４、開閉部１０９は過大な突入電流から保護されることが可能となる。 If this embodiment is used, the inrush current flowing through the opening / closing part 109 is limited when the opening / closing part 109 is closed. Thereby, the secondary battery 103, the secondary battery 104, and the opening / closing part 109 can be protected from an excessive inrush current.

以上のように本発明を用いれば、二次電池の過充電による破壊や劣化を防止または軽減することができる電池モジュールを提供することができる。 As described above, by using the present invention, it is possible to provide a battery module that can prevent or reduce damage and deterioration due to overcharging of a secondary battery.

本発明による電池モジュールの実施例４について図４を参照して説明する。なお、この実施例４の各部について図１に示す実施例１の電池モジュールの各部と同一部分は同一符号で示す。
この実施例４が実施例１と相違する点は、実施例１では開閉部１０９が、二次電池１０３の正極と二次電池１０４の負極に直接接続されていたのに対し、実施例４では、開閉部１０９がコンデンサ４０１を介して、二次電池１０３の正極と二次電池１０４の負極に接続されている点である。 Embodiment 4 of the battery module according to the present invention will be described with reference to FIG. In addition, about each part of this Example 4, the same part as each part of the battery module of Example 1 shown in FIG. 1 is shown with the same code | symbol.
The difference of the fourth embodiment from the first embodiment is that in the first embodiment, the opening / closing portion 109 is directly connected to the positive electrode of the secondary battery 103 and the negative electrode of the secondary battery 104, whereas in the fourth embodiment, The open / close unit 109 is connected to the positive electrode of the secondary battery 103 and the negative electrode of the secondary battery 104 via the capacitor 401.

本実施例のヒューズ１０５の溶断に至るまでの動作は実施例１と同様である。 The operation until the fuse 105 of this embodiment is blown is the same as that of the first embodiment.

実施例１では、電池モジュール１００を充電するため、外部の充電装置（図中不示）にて端子１０１、端子１０２を介して充電電流を供給している場合、開閉部１０９が閉状態となり、その後にヒューズ１０５が溶断した後も、開閉部１０９が端子１０１、端子１０２に直接接続されているため、電流が流れ続けるという不都合があった。開閉部１０９の抵抗値は低いため、過大な電流となる場合がある。 In Example 1, in order to charge the battery module 100, when the charging current is supplied via the terminal 101 and the terminal 102 by an external charging device (not shown in the drawing), the opening / closing unit 109 is closed, Even after the fuse 105 is melted, the open / close portion 109 is directly connected to the terminal 101 and the terminal 102, so that there is a problem that the current continues to flow. Since the resistance value of the opening / closing part 109 is low, an excessive current may be generated.

実施例４では、電池モジュール１００内のヒューズ１０５が溶断した後に、外部の充電装置（図中不示）から端子１０１、端子１０２を介して供給される電流を軽減することを目的としている。 The purpose of the fourth embodiment is to reduce the current supplied from the external charging device (not shown) via the terminal 101 and the terminal 102 after the fuse 105 in the battery module 100 is melted.

コンデンサ４０１は、開閉部１０９が閉状態となった場合に、開閉部１０９に流れる電流により電荷を蓄積する。当該電荷の蓄積動作は、端子１０１、端子１０２間の電圧と同電位になるまで継続する。コンデンサ４０１が端子１０１、端子１０２間の電圧と同電位になるまで充電されると、端子１０１、端子１０２間の電流は流れなくなる。これにより、電池モジュール１００内のヒューズ１０５が溶断した後に、外部の充電装置（図中不示）から端子１０１、端子１０２を介して供給される電流を軽減することができる。その結果、外部の充電装置を過大な電流や発熱から保護することが可能となる。 The capacitor 401 accumulates electric charge by the current flowing through the opening / closing unit 109 when the opening / closing unit 109 is closed. The charge accumulation operation continues until the same potential as the voltage between the terminals 101 and 102 is reached. When the capacitor 401 is charged to the same potential as the voltage between the terminal 101 and the terminal 102, the current between the terminal 101 and the terminal 102 does not flow. Thereby, after the fuse 105 in the battery module 100 is melted, the current supplied from the external charging device (not shown) via the terminal 101 and the terminal 102 can be reduced. As a result, the external charging device can be protected from excessive current and heat generation.

なお、コンデンサ４０１の容量は、二次電池１０４、ヒューズ１０５、二次電池１０３、開閉部１０９、コンデンサ４０１からなる回路に流れる電流にて、ヒューズ１０５が溶断するのに十分な時間、電流を流すことができる容量となるようにあらかじめ設定されるものとする。 Note that the capacity of the capacitor 401 is such that the current flows through a circuit including the secondary battery 104, the fuse 105, the secondary battery 103, the open / close unit 109, and the capacitor 401 for a time sufficient for the fuse 105 to blow. It is assumed that the capacity can be set in advance.

本実施例によれば、二次電池の過充電による破壊や劣化を防止または軽減することができる電池モジュールを提供することができる。 According to the present embodiment, it is possible to provide a battery module that can prevent or reduce destruction and deterioration due to overcharging of the secondary battery.

本実施例を用いれば、電池モジュール内部の二次電池が過充電となった場合に、開閉部１０９が閉状態となり電流が流れ、同時にヒューズ１０５にも電流が流れヒューズ１０５が発熱し溶断するため、充電電流が遮断され二次電池への過充電を停止することができる。 According to this embodiment, when the secondary battery in the battery module is overcharged, the opening / closing part 109 is closed and a current flows. At the same time, a current flows through the fuse 105, and the fuse 105 generates heat and blows. The charging current is cut off, and overcharging to the secondary battery can be stopped.

本実施例を用いれば、開閉部１０９が閉状態となった場合に、開閉部１０９に電流が流れる時間が制限される。これにより、端子１０１、端子１０２に接続された外部の充電装置が過大な電流や発熱から保護されることが可能となる。なお図５に示すようにコンデンサ４０１に抵抗器２０１が直列に接続されるものとしてもよい。 By using this embodiment, when the opening / closing part 109 is closed, the time during which current flows through the opening / closing part 109 is limited. As a result, the external charging device connected to the terminal 101 and the terminal 102 can be protected from excessive current and heat generation. Note that the resistor 201 may be connected in series to the capacitor 401 as shown in FIG.

以上のように本発明を用いれば、二次電池の過充電による破壊や劣化を防止または軽減することができる電池モジュールを提供することができる。 As described above, by using the present invention, it is possible to provide a battery module that can prevent or reduce damage and deterioration due to overcharging of a secondary battery.

１０１、１０２ 端子
１０３、１０４ 二次電池
１０５ ヒューズ
１０６、１０７ 電圧検出部
１０８ 駆動部
１０９ 開閉部
２０１ 抵抗器
３０１ リアクトル
４０１ コンデンサ 101, 102 Terminals 103, 104 Secondary battery 105 Fuse 106, 107 Voltage detection unit 108 Drive unit 109 Opening / closing unit 201 Resistor 301 Reactor 401 Capacitor

Claims (5)

電気的に直列に接続された複数の二次電池と、
前記複数の二次電池に電気的に直列に接続されたヒューズと、
前記複数の二次電池に接続され、過充電にかかる電圧を検出する電圧検出手段と、
閉状態となった時に、前記複数の二次電池からの電流を前記ヒューズに流すように接続され、前記電圧検出手段により過電圧が検出された場合に、閉状態となるように制御される開閉手段と
を具備したことを特徴とする電池モジュール。 A plurality of secondary batteries electrically connected in series;
A fuse electrically connected in series to the plurality of secondary batteries;
Voltage detecting means connected to the plurality of secondary batteries and detecting a voltage applied to overcharge;
Opening / closing means connected to flow current from the plurality of secondary batteries to the fuses when closed, and controlled to be closed when an overvoltage is detected by the voltage detection means A battery module comprising: 前記開閉手段は半導体スイッチであることを特徴とする請求項１記載の電池モジュール。 The battery module according to claim 1, wherein the opening / closing means is a semiconductor switch. 前記開閉手段に電気的に直列接続された抵抗器を具備したことを特徴とする請求項１記載の電池モジュール。 The battery module according to claim 1, further comprising a resistor electrically connected in series to the opening / closing means. 前記開閉手段に電気的に直列接続されたリアクトルを具備したことを特徴とする請求項１記載の電池モジュール。 The battery module according to claim 1, further comprising a reactor electrically connected in series to the opening / closing means. 前記開閉手段に電気的に直列接続されたコンデンサを具備したことを特徴とする請求項１記載の電池モジュール。 The battery module according to claim 1, further comprising a capacitor electrically connected in series to the opening / closing means.
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