JPH08195227A - Battery pack - Google Patents

Battery pack

Info

Publication number
JPH08195227A
JPH08195227A JP7004847A JP484795A JPH08195227A JP H08195227 A JPH08195227 A JP H08195227A JP 7004847 A JP7004847 A JP 7004847A JP 484795 A JP484795 A JP 484795A JP H08195227 A JPH08195227 A JP H08195227A
Authority
JP
Japan
Prior art keywords
battery
thermistor
battery pack
terminal
type
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
JP7004847A
Other languages
Japanese (ja)
Inventor
Noboru Yoshida
登 吉田
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.)
Hosiden Corp
Original Assignee
Hosiden Corp
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 Hosiden Corp filed Critical Hosiden Corp
Priority to JP7004847A priority Critical patent/JPH08195227A/en
Publication of JPH08195227A publication Critical patent/JPH08195227A/en
Pending legal-status Critical Current

Links

Classifications

    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Landscapes

  • Secondary Cells (AREA)
  • Battery Mounting, Suspending (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

PURPOSE: To reduce the size and cost of a battery pack. CONSTITUTION: In a battery pack 11 having a built-in battery-temperature detecting thermistor 15 and a thermistor terminal 17 installed therein, a Zener diode 31 for identifying the kind of battery is connected in parallel with the thermistor 15, and its Zener voltage VZD is set at a predetermined value greater than the output voltage VTH of the thermistor 15 during charge and determined so as to suit the kind of battery 12. Therefore, the thermistor terminal 17 can be used also as an identification terminal, whereby the number of part items and space for the installation of terminals are reduced.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】この発明はサーミスタ内蔵タイプ
のバッテリパックに関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermistor built-in type battery pack.

【0002】[0002]

【従来の技術】バッテリパックの充電時には充電器が適
正に動作し、充電が適正に行われるよう、一般にバッテ
リの温度が検出されており、このバッテリ温度検出のた
めに例えば携帯電話用のバッテリパックなどではバッテ
リパックにサーミスタを内蔵した構成が採用されてい
る。
2. Description of the Related Art When charging a battery pack, the temperature of the battery is generally detected so that the charger operates properly and the charging is properly performed. For this battery temperature detection, for example, a battery pack for a mobile phone. For example, a battery pack has a built-in thermistor.

【0003】一方、バッテリとしてはNi−Cd,Ni
−MH,Liイオン等の2次電池が採用されており、こ
れらバッテリの充電においては例えばNi−Cd電池で
は−ΔV/Δt又はピーク検出方式、Ni−MH電池で
はΔT/Δt検出方式、Liイオン電池では定電圧定電
流方式というように、バッテリの種類に応じて適正な充
電方法を用いる必要がある。
On the other hand, as the battery, Ni-Cd, Ni
Secondary batteries such as -MH and Li-ion are adopted. For charging these batteries, for example, -ΔV / Δt or peak detection method is used for Ni-Cd batteries, ΔT / Δt detection method is used for Ni-MH batteries, and Li-ion is used. For a battery, it is necessary to use an appropriate charging method depending on the type of battery, such as a constant voltage / constant current method.

【0004】従って、これらバッテリを内蔵したバッテ
リパックが使用上互換性を有し、混用される場合には、
充電時にバッテリパック内のバッテリの種類を判別し、
適正な充電方法を選択して行う必要があり、このため例
えばバッテリパックにバッテリ種類判別用の抵抗体を内
蔵してバッテリパックに判別用端子を設けたり、あるい
はバッテリパックの外部形状に一部差異をもたせて、そ
の差異を充電器側の検出スイッチで検出することによ
り、バッテリの種類を判別するといった方法が従来採用
されている。
Therefore, when the battery packs containing these batteries are compatible in use and mixed,
Determines the type of battery in the battery pack when charging,
It is necessary to select an appropriate charging method.For this reason, for example, a battery pack has a built-in resistor for battery type discrimination to provide a discrimination terminal on the battery pack, or there is a difference in the external shape of the battery pack. Conventionally, a method has been employed in which the type of battery is determined by detecting the difference with a detection switch on the charger side.

【0005】図3はこのようなサーミスタを内蔵し、か
つバッテリ種類判別用の端子が設けられた従来のバッテ
リパックの構成を、充電器側の回路の一部と共に示した
ものである。バッテリパック11内には、複数のバッテ
リセルが直列接続されてなるバッテリ12が収容され、
そのプラス極及びマイナス極がそれぞれバッテリパック
11に設置されたプラス端子13及びマイナス端子14
に接続されている。バッテリパック11にはバッテリ温
度検出用のサーミスタ15及びバッテリ種類判別用の抵
抗体16が内蔵されており、それらの各一端はバッテリ
パック11に設置されたサーミスタ端子17及び判別用
端子18にそれぞれ接続されている。なお、サーミスタ
15及び抵抗体16の各他端はマイナス端子14に接続
されている。
FIG. 3 shows a structure of a conventional battery pack including such a thermistor and provided with a terminal for battery type discrimination, together with a part of a circuit on the charger side. A battery 12 having a plurality of battery cells connected in series is housed in the battery pack 11,
A plus terminal and a minus terminal of which the plus pole and the minus pole are installed in the battery pack 11, respectively.
It is connected to the. The battery pack 11 includes a thermistor 15 for detecting the battery temperature and a resistor 16 for determining the battery type, and one end of each of them is connected to a thermistor terminal 17 and a determining terminal 18 installed in the battery pack 11, respectively. Has been done. The other ends of the thermistor 15 and the resistor 16 are connected to the minus terminal 14.

【0006】充電器側の回路は温度測定回路の一例を示
したものであり、抵抗体21を介して定電圧源(図示せ
ず)がバッテリパック11のサーミスタ端子17に接続
され、抵抗体21とバッテリパック11内のサーミスタ
15との直列接続によって電圧が分割される。今、例え
ば定電圧源の電圧を5V、抵抗体21の抵抗値R1 を1
0kΩとし、サーミスタ15の抵抗値RTHが25℃で1
0kΩとすると、25℃の時、サーミスタ端子17で測
定される電圧VTHは2.5Vとなる。サーミスタ15の
特性にもよるが、100℃でRTH=1kΩとすれば、V
TH=0.46V、0℃でRTH=30kΩとすればVTH
3.75Vとなり、VTHを測定することでバッテリ12
の温度を知ることができる。なお、VTHは充電器のCP
U(中央処理装置)のA/Dポートに入力される。
The circuit on the charger side shows an example of a temperature measuring circuit. A constant voltage source (not shown) is connected to the thermistor terminal 17 of the battery pack 11 via the resistor 21, and the resistor 21 is connected. And the thermistor 15 in the battery pack 11 are connected in series to divide the voltage. Now, for example, the voltage of the constant voltage source is 5 V, and the resistance value R 1 of the resistor 21 is 1
When the resistance value R TH of the thermistor 15 is 0 kΩ and is 1 at 25 ° C
Assuming 0 kΩ, the voltage V TH measured at the thermistor terminal 17 is 2.5 V at 25 ° C. Depending on the characteristics of the thermistor 15, if R TH = 1 kΩ at 100 ° C, then V
If TH = 0.46 V and R TH = 30 kΩ at 0 ° C, V TH =
It becomes 3.75V, and by measuring V TH the battery 12
You can know the temperature of. V TH is the CP of the charger
It is input to the U (Central Processing Unit) A / D port.

【0007】バッテリパック11内の抵抗体16の抵抗
値はバッテリ12の種類に応じてそれぞれ異なる所定の
値に定められており、充電器の、例えば温度測定回路と
同様に構成された判別回路(図示せず)を判別用端子1
8に接続してその判別用端子18の電圧を測定すること
によって、バッテリ12の種類を判別することができ
る。
The resistance value of the resistor 16 in the battery pack 11 is set to a different predetermined value depending on the type of the battery 12, and a discrimination circuit (similar to the temperature measuring circuit of the charger, for example) ( (Not shown) for determining terminal 1
The type of the battery 12 can be discriminated by connecting to the battery 8 and measuring the voltage of the discrimination terminal 18.

【0008】[0008]

【発明が解決しようとする課題】以上述べたように、従
来のバッテリパック11においては、そのバッテリ12
の種類を充電器が判別することができるように、判別用
端子18が設けられており、その分部品点数が多くな
り、また端子配置スペースを必要とするため、バッテリ
パックの小型低価格化の阻害要因となっていた。
As described above, in the conventional battery pack 11, the battery 12
The discrimination terminal 18 is provided so that the charger can discriminate the type of the battery pack, the number of parts is increased correspondingly, and the terminal disposition space is required. It was an obstacle.

【0009】一方、バッテリパックの外部形状の差異に
よってバッテリの種類を判別する方法では、バッテリパ
ック用の金型数が増え、金型費用が増大すると共に、充
電器側に検出スイッチを設けなければならず、価格面で
問題があった。この発明は、充電時にバッテリ種類の判
別及びバッテリ温度の検出が可能なバッテリパックの小
型低価格化を図ることを目的とする。
On the other hand, in the method of discriminating the type of battery by the difference in the external shape of the battery pack, the number of molds for the battery pack increases, the mold cost increases, and the detection switch must be provided on the charger side. However, there was a problem in terms of price. An object of the present invention is to reduce the size and cost of a battery pack capable of determining the battery type and detecting the battery temperature during charging.

【0010】[0010]

【課題を解決するための手段】この発明はサーミスタを
内蔵し、その出力端子が設置されたバッテリパックにお
いて、サーミスタに並列にツェナーダイオードを接続
し、そのツェナー電圧を充電時におけるサーミスタの出
力電圧より大とし、かつバッテリパック内のバッテリの
種類に対応して決定された所定の値とするものである。
According to the present invention, in a battery pack having a built-in thermistor and having its output terminal installed, a Zener diode is connected in parallel to the thermistor, and the Zener voltage is determined from the output voltage of the thermistor during charging. The value is set to a large value and a predetermined value determined in accordance with the type of battery in the battery pack.

【0011】[0011]

【実施例】図1にこの発明の一実施例を、充電器側の回
路の一部と共に示す。なお、図3と対応する部分には同
一符号を付し、その説明を省略する。この例ではバッテ
リパック11に設置される端子はプラス端子13、マイ
ナス端子14及びサーミスタ端子17の3つであり、バ
ッテリパック11にはバッテリ12、サーミスタ15及
びサーミスタ15に並列に接続されたツェナーダイオー
ド31が内蔵される。ツェナーダイオード31のツェナ
ー電圧VZDは、バッテリ12充電時の温度検出のために
サーミスタ端子17で測定される電圧VTHより大とさ
れ、かつバッテリ12の種類に対応して決定された所定
の値とされる。
FIG. 1 shows an embodiment of the present invention together with a part of the circuit on the charger side. The parts corresponding to those in FIG. 3 are designated by the same reference numerals, and the description thereof will be omitted. In this example, the terminals installed in the battery pack 11 are three terminals: a positive terminal 13, a negative terminal 14, and a thermistor terminal 17, and the battery pack 11 has a battery 12, a thermistor 15, and a Zener diode connected in parallel to the thermistor 15. 31 is built in. The Zener voltage V ZD of the Zener diode 31 is set to be higher than the voltage V TH measured at the thermistor terminal 17 for detecting the temperature when the battery 12 is charged, and is a predetermined value determined according to the type of the battery 12. It is said that

【0012】今、図3において例示した値と同様に、例
えば定電圧源の電圧を5V、抵抗体21の抵抗値R1
10kΩ、サーミスタ15の抵抗値RTHを25℃で10
kΩ、0℃で30kΩとすると、0℃でVTH=3.75
Vであり、0℃以下では一般に充電は行わないことか
ら、充電時にVTHが4Vを越えることはなく、つまり4
V〜5Vの範囲は温度検出に使用されないことになる。
Similar to the values illustrated in FIG. 3, for example, the voltage of the constant voltage source is 5 V, the resistance value R 1 of the resistor 21 is 10 kΩ, and the resistance value R TH of the thermistor 15 is 10 at 25 ° C.
If kΩ and 30 kΩ at 0 ° C., V TH = 3.75 at 0 ° C.
Since V is V and charging is generally not performed at 0 ° C. or lower, V TH does not exceed 4 V during charging, that is, 4 V
The range of V-5V will not be used for temperature sensing.

【0013】従って、この例では、ツェナーダイオード
31のツェナー電圧VZDは4V〜5Vの範囲内に設定さ
れ、この範囲内でバッテリ12の種類毎にツェナー電圧
ZDが段階的に設定される。なお、ツェナー電圧VZD
ばらつきを考慮しても、1Vの範囲内に3〜5段階程度
の設定が可能であり、即ちこの例では3〜5種類程度の
バッテリ12をツェナー電圧VZDの値によって判別でき
るように構成することができる。なお、上述した例では
ツェナーダイオード31を負特性のものとしたが、正特
性のものを使用することもできる。
Therefore, in this example, the Zener voltage V ZD of the Zener diode 31 is set within the range of 4 V to 5 V, and the Zener voltage V ZD is set stepwise for each type of the battery 12 within this range. Even if the variation of the Zener voltage V ZD is taken into consideration, it is possible to set about 3 to 5 steps within the range of 1 V, that is, in this example, about 3 to 5 kinds of batteries 12 are set to the value of the Zener voltage V ZD . It can be configured to be discriminated by. Although the Zener diode 31 has a negative characteristic in the above example, a positive characteristic can also be used.

【0014】次に、充電器側の判別回路について説明す
る。図1に示すように、トランジスタ32及び抵抗体3
3を温度検出用の抵抗体21に並列に接続配置する。抵
抗体33の抵抗値R2 は、トランジスタ32をONにし
た時にVTHがツェナーダイオード31のツェナー電圧V
ZD以上となるように設定する。トランジスタ32がOF
Fであれば、VTHはツェナー電圧VZDより小さいため、
THを測定することにより、バッテリ12の温度検出を
行うことができる。一方、トランジスタ32をONにす
ると、VTHはツェナー電圧VZDになり、このV ZDの値を
測定することにより、バッテリ12の種別判定ができ
る。従って、例えば充電器のCPUによりトランジスタ
32を制御することによって、バッテリ12の種類判別
と温度検出とをVTHの測定により行うことができる。
Next, the discrimination circuit on the charger side will be described.
It As shown in FIG. 1, the transistor 32 and the resistor 3
3 is connected in parallel to the temperature detecting resistor 21. Often
Resistance value R of antibody 332Turns on the transistor 32
V whenTHIs the Zener voltage V of the Zener diode 31
ZDSet so that it is above. Transistor 32 is OF
If F, then VTHIs the Zener voltage VZDSmaller than
VTHThe temperature of the battery 12 can be detected by measuring
It can be carried out. On the other hand, turn on the transistor 32.
Then VTHIs the Zener voltage VZDAnd this V ZDThe value of
The type of the battery 12 can be determined by measuring
It Thus, for example, the CPU of the charger may
By controlling 32, the type of the battery 12 can be determined.
And temperature detection VTHCan be measured.

【0015】図2はツェナーダイオード31の特性のば
らつきを吸収するために、ツェナーダイオード31に直
列に抵抗体34を接続配置した例を示したものである。
FIG. 2 shows an example in which a resistor 34 is connected in series with the Zener diode 31 in order to absorb variations in the characteristics of the Zener diode 31.

【0016】[0016]

【発明の効果】以上説明したように、この発明はバッテ
リ温度検出用のサーミスタに並列に、バッテリ種類判別
用のツェナーダイオードを接続して、サーミスタ端子を
バッテリ種類判別用端子に兼用できるようにしたもので
あり、よってサーミスタ端子と判別用端子とを各別に設
置する必要はなく、その分部品点数を削減でき、かつ端
子配置スペースを縮小できるため、小型で安価なバッテ
リパックを得ることができる。
As described above, according to the present invention, a zener diode for battery type discrimination is connected in parallel with a thermistor for battery temperature detection so that the thermistor terminal can also be used as a battery type discrimination terminal. Therefore, it is not necessary to separately install the thermistor terminal and the discrimination terminal, and the number of parts can be reduced and the terminal arrangement space can be reduced accordingly, so that a small and inexpensive battery pack can be obtained.

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

【図1】この発明の一実施例を説明するための回路構成
図。
FIG. 1 is a circuit configuration diagram for explaining an embodiment of the present invention.

【図2】この発明の他の実施例を示す回路構成図。FIG. 2 is a circuit configuration diagram showing another embodiment of the present invention.

【図3】従来のバッテリパックを説明するための回路構
成図。
FIG. 3 is a circuit configuration diagram for explaining a conventional battery pack.

【符号の説明】[Explanation of symbols]

11 バッテリパック 12 バッテリ 15 サーミスタ 17 サーミスタ端子 31 ツェナーダイオード 11 Battery Pack 12 Battery 15 Thermistor 17 Thermistor Terminal 31 Zener Diode

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 サーミスタを内蔵し、その出力端子が設
置されたバッテリパックにおいて、 上記サーミスタに並列にツェナーダイオードが接続さ
れ、 そのツェナー電圧が、充電時における上記サーミスタの
出力電圧より大とされ、かつ上記バッテリパック内のバ
ッテリの種類に対応して決定された所定の値とされてい
ることを特徴とするバッテリパック。
1. A battery pack in which a thermistor is built-in and an output terminal of which is installed, a Zener diode is connected in parallel to the thermistor, and the Zener voltage is higher than the output voltage of the thermistor during charging, A battery pack having a predetermined value determined according to the type of battery in the battery pack.
JP7004847A 1995-01-17 1995-01-17 Battery pack Pending JPH08195227A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7004847A JPH08195227A (en) 1995-01-17 1995-01-17 Battery pack

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7004847A JPH08195227A (en) 1995-01-17 1995-01-17 Battery pack

Publications (1)

Publication Number Publication Date
JPH08195227A true JPH08195227A (en) 1996-07-30

Family

ID=11595081

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7004847A Pending JPH08195227A (en) 1995-01-17 1995-01-17 Battery pack

Country Status (1)

Country Link
JP (1) JPH08195227A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7508225B2 (en) * 2006-09-07 2009-03-24 Kyocera Wireless Corporation Apparatus, system and method for identification with temperature dependent resistive device
JP2011242202A (en) * 2010-05-17 2011-12-01 Toyota Motor Corp Power storage device specifying system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7508225B2 (en) * 2006-09-07 2009-03-24 Kyocera Wireless Corporation Apparatus, system and method for identification with temperature dependent resistive device
JP2010502987A (en) * 2006-09-07 2010-01-28 キョウセラ ワイヤレス コープ. Identification using temperature-dependent resistive devices
AU2007293097B2 (en) * 2006-09-07 2010-09-09 Kyocera Corporation Apparatus, system and method for identification with temperature dependent resistive device
JP4940305B2 (en) * 2006-09-07 2012-05-30 キョウセラ ワイヤレス コープ. Identification using temperature-dependent resistive devices
JP2011242202A (en) * 2010-05-17 2011-12-01 Toyota Motor Corp Power storage device specifying system

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