WO2015186421A1 - Battery state measuring device and battery provided with same - Google Patents

Battery state measuring device and battery provided with same Download PDF

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Publication number
WO2015186421A1
WO2015186421A1 PCT/JP2015/060633 JP2015060633W WO2015186421A1 WO 2015186421 A1 WO2015186421 A1 WO 2015186421A1 JP 2015060633 W JP2015060633 W JP 2015060633W WO 2015186421 A1 WO2015186421 A1 WO 2015186421A1
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Prior art keywords
battery
state measuring
sensor
measuring device
battery state
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PCT/JP2015/060633
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French (fr)
Japanese (ja)
Inventor
順哉 若林
健次 金丸
上野　洋
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株式会社東海理化電機製作所
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Publication of WO2015186421A1 publication Critical patent/WO2015186421A1/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
    • G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
    • G01R15/20—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using galvano-magnetic devices, e.g. Hall-effect devices, i.e. measuring a magnetic field via the interaction between a current and a magnetic field, e.g. magneto resistive or Hall effect devices
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/569—Constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals
    • 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

Definitions

  • the present invention relates to a battery state measuring device and a battery including the battery state measuring device.
  • the internal resistance measuring device described in Patent Document 1 includes a connection member that is fastened and fixed to a battery terminal, a bus bar that is attached to the upper surface of the connection member, and a circuit board that is attached to the upper surface of the bus bar.
  • a microcomputer is mounted on the circuit board.
  • the circuit board is housed inside the protective case, measures the voltage, current, temperature, and impedance of the battery, determines the battery state such as charging and deterioration, and transmits the determination result to the control unit. It has become.
  • the circuit board is assembled at a position away from the battery via a conductor composed of a connecting member and a bus bar. Therefore, it becomes easy to be influenced by the temperature change of the external environment of the battery, and it becomes difficult to accurately measure the battery state such as charging and deterioration.
  • the circuit board Since the circuit board is assembled at a position away from the battery via the conductor composed of the connecting member and the bus bar, the length of the conductor that electrically connects the circuit board and the battery is increased, and the influence of the conductor resistance is increased. It becomes easy to receive.
  • An object of the present invention is to provide a battery state measuring device capable of accurately measuring at least one of the current, temperature and voltage of the battery, and a battery including the battery state measuring device.
  • a battery state measurement device includes a battery sensor that detects at least one of a current, a temperature, and a voltage of a battery body, and a mounting member that mounts the battery sensor, and the mounting member Is attached to the inside of the cover member on the battery body.
  • the battery sensor according to [1] may include a core provided on an outer periphery of a battery post of the battery body, and a magnetic sensor that detects a magnitude of a magnetic field generated in the core. Good.
  • the battery sensor according to [1] may include a shunt resistor on a battery post of the battery body.
  • the mounting member according to [1] may include a circuit board or a lead frame attached to the inner surface of the cover member.
  • a battery according to another aspect of the present invention includes the battery state measuring device according to any one of [1] to [4].
  • a battery state measurement device that can improve the measurement accuracy of a battery state.
  • FIG. 1 is a perspective view schematically showing a battery provided with a battery state measuring apparatus according to a first embodiment suitable for the present invention.
  • FIG. 2 is a perspective view schematically showing the battery state measuring apparatus according to the first embodiment.
  • FIG. 3 is a cross-sectional view schematically showing a main part of the battery state measuring apparatus according to the first embodiment.
  • FIG. 4 is a cross-sectional view schematically showing a main part of the battery state measuring apparatus according to the second embodiment suitable for the present invention.
  • FIG. 5 is a circuit diagram showing a configuration example of the battery state measuring apparatus according to the second embodiment.
  • FIG. 1 (Battery overall configuration)
  • reference numeral 1 indicating the whole schematically illustrates the external configuration of a battery mounted on a vehicle.
  • the battery 1 includes a battery body 4 made of polypropylene having a pair of battery posts 2 and 3 on both the negative electrode side and the positive electrode side on the upper surface, and a pair of through holes 5a and 5a for assembling the battery posts 2 and 3. And a cover member 5 made of polypropylene for sealing the upper surface of the main body 4.
  • the battery 1 is a secondary battery such as a lead battery, a lithium ion battery, or nickel metal hydride.
  • the battery state measuring device 10 is a device that measures (calculates) at least one of the current, temperature, and voltage of the battery body 4.
  • the battery state measuring apparatus 10 includes a circuit board 11 that is a mounting member on which a plurality of circuit patterns (not shown) are formed.
  • the circuit board 11 is held on the back surface (inner surface: inner space 6 side) of the cover member 5 by fixing means such as potting or welding.
  • the circuit pattern of the circuit board 11 includes a battery sensor 12 that detects the current and temperature of the battery body 4, and a battery state monitoring unit that monitors the current and temperature states of the battery body 4. And the four connector terminals 14,..., 14 are electrically connected.
  • a waterproof connector 7 is provided on the surface of the cover member 5.
  • the waterproof connector 7 includes the same number of connection terminals (not shown) that are electrically connected to the connector terminals 14,..., 14 via the four lead wires 8,.
  • the waterproof connector 7 is electrically connected to a vehicle ECU (not shown).
  • vehicle ECU controls, for example, in-vehicle electrical components and engines based on the battery state signal from the monitoring IC 13.
  • the battery sensor 12 and the monitoring IC 13 are supplied with power by the vehicle ECU or the battery post 3 on the positive electrode side of the battery 1.
  • the battery sensor 12 includes a temperature sensor 15 that detects the temperature of the internal space 6 of the battery body 4, a magnetic sensor 16 that detects a magnetic field generated by a current flowing through the battery body 4, and And a voltage sensor 18 for detecting the voltage of the battery body 4.
  • the temperature sensor 15 is composed of, for example, a thermistor.
  • the thermistor is an element whose resistance value changes according to temperature, and a voltage generated by the change in resistance value is converted into temperature.
  • the voltage sensor 18 detects, for example, a voltage supplied to the battery body 4 or a voltage charged to the battery body 4.
  • the magnetic sensor 16 includes a magnetic detection element such as a Hall IC or a Hall element. As shown in FIGS. 1 to 3, the magnetic sensor 16 includes a core 17 in which a gap portion 17a is provided in a part of an annular portion. The battery post 2 on the negative electrode side is inserted through the opening of the annular portion of the core 17, and the magnetic sensor 16 mounted on the circuit board 11 is disposed in the gap portion 17 a of the core 17.
  • the magnetic sensor 16 is introduced into the gap portion 17 a of the core 17 when the circuit board 11 is accommodated in the internal space 6 of the battery body 4.
  • the magnetic sensor 16 detects the strength of the magnetic field generated in the core 17 by the current flowing through the battery post 2 on the negative electrode side.
  • Signals detected by the temperature sensor 15, the voltage sensor 18 and the magnetic sensor 16 are sent to the monitoring IC 13 as shown in FIGS. 2 and 3.
  • the monitoring IC 13 monitors the battery state such as the remaining capacity of the battery body 4 based on the output signals of the temperature sensor 15, the voltage sensor 18 and the magnetic sensor 16.
  • a battery status signal such as the remaining capacity of the battery body 4 is transmitted to the vehicle ECU.
  • FIG. 4 and FIG. 5 schematically illustrate an example of the battery state measurement device 10 according to the second embodiment.
  • the second embodiment except for the current sensor using the magnetic sensor 16 and the core 17, the other configurations are the same as those in the first embodiment.
  • FIG. 4 and FIG. 5 the same members as those in the first embodiment are denoted by the same member names and reference numerals, and detailed description thereof will be omitted.
  • the battery state measuring apparatus 10 is for measuring the current flowing through the battery post 2 on the negative electrode side instead of the magnetic sensor 16 and the core 17.
  • a current detection shunt resistor 20 having a resistance value RS is used.
  • the shunt resistor 20 is provided on a part of the negative battery post 2, and a part of the negative battery post 2 is configured as a shunt resistor.
  • the battery post 3 on the positive electrode side is electrically connected to a load 9 such as an in-vehicle electrical component or an engine.
  • the shunt resistor 20 is electrically connected to an amplifier 21 that amplifies a difference between voltages generated at both ends of the shunt resistor 20.
  • the amplifier 21 outputs a potential difference ⁇ V generated at both ends of the shunt resistor 20 to the monitoring IC 13.
  • the battery state measuring apparatus 10 according to the second embodiment has the following effects in addition to the same effects as those of the first embodiment.
  • the configuration of the electronic component mounted on the circuit board 11 can be simplified and the setting position of the mounting position of the electronic component can be freely set.
  • the degree can be increased.
  • the degree of freedom in setting the mounting position of the electronic component can be increased, the detection accuracy and the detection efficiency can be improved, and the degree of freedom in design can be improved.
  • the configuration in which electronic components such as the battery sensor 12 are mounted on the circuit board 11 is illustrated.
  • the present invention is not limited to this.
  • a lead frame is used as a mounting member for the electronic components.
  • the configuration may be such that electronic components such as the battery sensor 12 are electrically connected by bonding connection or flip chip connection.
  • the lead frame can be integrally formed with the cover member 5.
  • a part of the battery post 2 on the negative electrode side is configured as the shunt resistor.
  • the present invention is not limited to this.
  • the entire battery post 2 on the negative electrode side is connected to the shunt resistor. It can be used as a part.
  • the electronic components such as the battery sensor 12 may be appropriately selected in terms of the number of arrangement, the arrangement position, the arrangement form, and the like according to the purpose of use, and of course, the initial object of the present invention can be achieved.
  • the battery state measuring device 10 can be applied to various devices other than a vehicle equipped with a battery.
  • the present invention can be applied to a battery state measuring device that is attached to a vehicle-mounted battery and used to detect a battery state such as charging and deterioration.

Abstract

Provided are: a battery state measuring device capable of accurately measuring at least one of a current, temperature, and voltage of a battery; and a battery provided with the battery state measuring device. The battery state measuring device (10) has: a battery sensor (12) that detects at least one of a current, temperature, and voltage of a battery main body (4); and a mounting member (11) having the battery sensor (12) mounted thereon. The mounting member (11) is attached to the inner side of a cover member (5) on the battery main body (4).

Description

バッテリ状態測定装置及びそれを備えたバッテリBattery state measuring device and battery equipped with the same
本発明は、バッテリ状態測定装置及びそのバッテリ状態測定装置を備えたバッテリに関する。 The present invention relates to a battery state measuring device and a battery including the battery state measuring device.
車載用バッテリの端子に取り付けることでバッテリ状態を検知する内部抵抗測定装置が提案されている（例えば、特許文献１参照。）。 There has been proposed an internal resistance measuring device that detects a battery state by being attached to a terminal of a vehicle-mounted battery (see, for example, Patent Document 1).
特許文献１に記載された内部抵抗測定装置は、バッテリの端子に締付固定される接続部材と、接続部材の上面に取り付けられるバスバーと、バスバーの上面に取り付けられる回路基板とを備えている。 The internal resistance measuring device described in Patent Document 1 includes a connection member that is fastened and fixed to a battery terminal, a bus bar that is attached to the upper surface of the connection member, and a circuit board that is attached to the upper surface of the bus bar.
回路基板には、マイクロコンピュータが実装されている。回路基板は、保護ケースの内部に収容されており、バッテリの電圧、電流、温度、及びインピーダンスを測定し、充電や劣化等のバッテリ状態を判定するとともに、判定結果をコントロールユニットへ送信する構成となっている。 A microcomputer is mounted on the circuit board. The circuit board is housed inside the protective case, measures the voltage, current, temperature, and impedance of the battery, determines the battery state such as charging and deterioration, and transmits the determination result to the control unit. It has become.
特開２０１４－６２８２６号公報JP 2014-62826 A
特許文献１記載の内部抵抗測定装置は、接続部材及びバスバーからなる導体を介して回路基板がバッテリから離れた位置に組み付けられる。そのため、バッテリの外界の温度変化の影響を受けやすくなり、充電や劣化等のバッテリ状態を正確に測定することは困難となる。 In the internal resistance measuring device described in Patent Document 1, the circuit board is assembled at a position away from the battery via a conductor composed of a connecting member and a bus bar. Therefore, it becomes easy to be influenced by the temperature change of the external environment of the battery, and it becomes difficult to accurately measure the battery state such as charging and deterioration.
接続部材及びバスバーからなる導体を介して回路基板がバッテリから離れた位置に組み付けられることから、回路基板及びバッテリの間を電気的に接続する導体の長さ寸法が長くなり、導体抵抗の影響をも受けやすくなる。 Since the circuit board is assembled at a position away from the battery via the conductor composed of the connecting member and the bus bar, the length of the conductor that electrically connects the circuit board and the battery is increased, and the influence of the conductor resistance is increased. It becomes easy to receive.
本発明の目的は、バッテリの電流、温度及び電圧の少なくとも１つを正確に測定することを可能としたバッテリ状態測定装置及びそのバッテリ状態測定装置を備えたバッテリを提供することにある。 An object of the present invention is to provide a battery state measuring device capable of accurately measuring at least one of the current, temperature and voltage of the battery, and a battery including the battery state measuring device.
［１］本発明の一態様によるバッテリ状態測定装置は、バッテリ本体の電流、温度及び電圧の少なくとも１つを検出するバッテリセンサと、前記バッテリセンサを搭載する搭載部材とを有し、前記搭載部材は、前記バッテリ本体上のカバー部材内側に取り付けられる。 [1] A battery state measurement device according to an aspect of the present invention includes a battery sensor that detects at least one of a current, a temperature, and a voltage of a battery body, and a mounting member that mounts the battery sensor, and the mounting member Is attached to the inside of the cover member on the battery body.
［２］上記［１］記載の前記バッテリセンサは、前記バッテリ本体のバッテリポストの外周に設けられたコアと、前記コア中に発生する磁界の大きさを検出する磁気センサとを有してもよい。 [2] The battery sensor according to [1] may include a core provided on an outer periphery of a battery post of the battery body, and a magnetic sensor that detects a magnitude of a magnetic field generated in the core. Good.
［３］上記［１］記載の前記バッテリセンサは、前記バッテリ本体のバッテリポスト上にシャント抵抗部を有してもよい。 [3] The battery sensor according to [1] may include a shunt resistor on a battery post of the battery body.
［４］上記［１］記載の前記搭載部材は、前記カバー部材の内表面に取り付けられる回路基板又はリードフレームを有してもよい。 [4] The mounting member according to [1] may include a circuit board or a lead frame attached to the inner surface of the cover member.
［５］本発明の他の態様によるバッテリは、上記［１］～［４］のいずれか１に記載のバッテリ状態測定装置を有する。 [5] A battery according to another aspect of the present invention includes the battery state measuring device according to any one of [1] to [4].
本発明の一態様によると、バッテリ状態の測定精度を向上させることができるバッテリ状態測定装置を提供できる。 According to one embodiment of the present invention, it is possible to provide a battery state measurement device that can improve the measurement accuracy of a battery state.
図１は、本発明に好適な第１の実施の形態に係るバッテリ状態測定装置を備えたバッテリを模式的に示す斜視図である。FIG. 1 is a perspective view schematically showing a battery provided with a battery state measuring apparatus according to a first embodiment suitable for the present invention. 図２は、第１の実施の形態に係るバッテリ状態測定装置を模式的に示す斜視図である。FIG. 2 is a perspective view schematically showing the battery state measuring apparatus according to the first embodiment. 図３は、第１の実施の形態に係るバッテリ状態測定装置の要部を模式的に示す断面図である。FIG. 3 is a cross-sectional view schematically showing a main part of the battery state measuring apparatus according to the first embodiment. 図４は、本発明に好適な第２の実施の形態に係るバッテリ状態測定装置の要部を模式的に示す断面図である。FIG. 4 is a cross-sectional view schematically showing a main part of the battery state measuring apparatus according to the second embodiment suitable for the present invention. 図５は、第２の実施の形態に係るバッテリ状態測定装置の一構成例を示す回路図である。FIG. 5 is a circuit diagram showing a configuration example of the battery state measuring apparatus according to the second embodiment.
以下、本発明の好適な実施の形態を添付図面に基づいて具体的に説明する。 Preferred embodiments of the present invention will be specifically described below with reference to the accompanying drawings.
［第１の実施の形態］
（バッテリの全体構成）
図１において、全体を示す符号１は、車両に搭載されたバッテリの外観構成を模式的に例示している。バッテリ１は、上面に負極側及び正極側の両側一対のバッテリポスト２，３を有するポリプロピレン製のバッテリ本体４と、バッテリポスト２，３に組み付けるための一対の貫通孔５ａ，５ａを介してバッテリ本体４の上面を密閉するポリプロピレン製のカバー部材５とを備えている。バッテリ１は、例えば鉛電池、リチウムイオン電池あるいはニッケル水素等の二次電池である。 [First Embodiment]
(Battery overall configuration)
In FIG. 1, reference numeral 1 indicating the whole schematically illustrates the external configuration of a battery mounted on a vehicle. The battery 1 includes a battery body 4 made of polypropylene having a pair of battery posts 2 and 3 on both the negative electrode side and the positive electrode side on the upper surface, and a pair of through holes 5a and 5a for assembling the battery posts 2 and 3. And a cover member 5 made of polypropylene for sealing the upper surface of the main body 4. The battery 1 is a secondary battery such as a lead battery, a lithium ion battery, or nickel metal hydride.
バッテリ本体４の上面とカバー部材５との間には、図１～図３に示すように、バッテリ状態測定装置１０を収容する内部空間６が形成されている。このバッテリ状態測定装置１０は、バッテリ本体４の電流、温度及び電圧の少なくとも１つを測定（算出）する装置である。 Between the upper surface of the battery body 4 and the cover member 5, as shown in FIGS. 1 to 3, an internal space 6 for accommodating the battery state measuring device 10 is formed. The battery state measuring device 10 is a device that measures (calculates) at least one of the current, temperature, and voltage of the battery body 4.
（バッテリ状態測定装置の構成）
バッテリ状態測定装置１０は、図１～図３に示すように、図示しない複数の回路パターンが形成された搭載部材である回路基板１１を備えている。回路基板１１は、例えばポッティング又は溶着などの固着手段によりカバー部材５の裏面（内表面：内部空間６側）に保持されている。 (Configuration of battery status measurement device)
As shown in FIGS. 1 to 3, the battery state measuring apparatus 10 includes a circuit board 11 that is a mounting member on which a plurality of circuit patterns (not shown) are formed. The circuit board 11 is held on the back surface (inner surface: inner space 6 side) of the cover member 5 by fixing means such as potting or welding.
回路基板１１の回路パターンには、図１～図３に示すように、バッテリ本体４の電流及び温度を検出するバッテリセンサ１２と、バッテリ本体４の電流及び温度の状態を監視するバッテリ状態監視部である監視ＩＣ１３と、４本のコネクタ端子１４，…，１４とが電気的に接続されている。 As shown in FIGS. 1 to 3, the circuit pattern of the circuit board 11 includes a battery sensor 12 that detects the current and temperature of the battery body 4, and a battery state monitoring unit that monitors the current and temperature states of the battery body 4. And the four connector terminals 14,..., 14 are electrically connected.
カバー部材５の表面には、図１及び図２に示すように、防水コネクタ７が設けられている。防水コネクタ７の内部には、４本のリード線８，…，８を介してコネクタ端子１４，…，１４のそれぞれに電気的に接続される図示しない同一本数の接続端子が備えられている。 As shown in FIGS. 1 and 2, a waterproof connector 7 is provided on the surface of the cover member 5. The waterproof connector 7 includes the same number of connection terminals (not shown) that are electrically connected to the connector terminals 14,..., 14 via the four lead wires 8,.
防水コネクタ７は、図示しない車両ＥＣＵに電気的に接続される。車両ＥＣＵは、監視ＩＣ１３からのバッテリ状態信号に基づいて、例えば車載電装品やエンジン等を制御する。バッテリセンサ１２及び監視ＩＣ１３は、車両ＥＣＵあるいはバッテリ１の正極側のバッテリポスト３によって電力供給を受ける。 The waterproof connector 7 is electrically connected to a vehicle ECU (not shown). The vehicle ECU controls, for example, in-vehicle electrical components and engines based on the battery state signal from the monitoring IC 13. The battery sensor 12 and the monitoring IC 13 are supplied with power by the vehicle ECU or the battery post 3 on the positive electrode side of the battery 1.
バッテリセンサ１２は、図２及び図３に示すように、バッテリ本体４の内部空間６の温度を検出する温度センサ１５と、バッテリ本体４に流れる電流により発生する磁界を検出する磁気センサ１６と、バッテリ本体４の電圧を検出する電圧センサ１８とを備えている。 As shown in FIGS. 2 and 3, the battery sensor 12 includes a temperature sensor 15 that detects the temperature of the internal space 6 of the battery body 4, a magnetic sensor 16 that detects a magnetic field generated by a current flowing through the battery body 4, and And a voltage sensor 18 for detecting the voltage of the battery body 4.
バッテリ容量は、例えばバッテリ１の温度の低下に伴い、電解液の電気抵抗が増大することで減少することから、バッテリ容量の状態等は、バッテリ１の温度の変化により影響を与える。そのため、温度センサ１５によりバッテリ本体４の内部空間６の温度を検出することが肝要である。温度センサ１５は、例えばサーミスタ等からなる。サーミスタは、温度に応じて抵抗値が変化する素子であり、抵抗値の変化によって発生する電圧が温度に換算される。 For example, the battery capacity decreases as the electric resistance of the electrolytic solution increases as the temperature of the battery 1 decreases. Therefore, the state of the battery capacity and the like are affected by changes in the temperature of the battery 1. Therefore, it is important to detect the temperature of the internal space 6 of the battery body 4 by the temperature sensor 15. The temperature sensor 15 is composed of, for example, a thermistor. The thermistor is an element whose resistance value changes according to temperature, and a voltage generated by the change in resistance value is converted into temperature.
電圧センサ１８は、例えばバッテリ本体４に供給される電圧やバッテリ本体４に充電される電圧を検出する。 The voltage sensor 18 detects, for example, a voltage supplied to the battery body 4 or a voltage charged to the battery body 4.
一方、磁気センサ１６は、例えばホールＩＣあるいはホール素子等の磁気検出素子からなる。磁気センサ１６は、図１～図３に示すように、環状部の一部にギャップ部１７ａが設けられたコア１７を備えている。このコア１７の環状部の開口には、負極側のバッテリポスト２が挿入貫通されており、回路基板１１に実装した磁気センサ１６がコア１７のギャップ部１７ａ内に配置されている。 On the other hand, the magnetic sensor 16 includes a magnetic detection element such as a Hall IC or a Hall element. As shown in FIGS. 1 to 3, the magnetic sensor 16 includes a core 17 in which a gap portion 17a is provided in a part of an annular portion. The battery post 2 on the negative electrode side is inserted through the opening of the annular portion of the core 17, and the magnetic sensor 16 mounted on the circuit board 11 is disposed in the gap portion 17 a of the core 17.
磁気センサ１６は、図２及び図３に示すように、バッテリ本体４の内部空間６内に回路基板１１を収容する際に、コア１７のギャップ部１７ａ内に導入される。負極側のバッテリポスト２を流れる電流によってコア１７に発生する磁界の強さが、磁気センサ１６により検出される。 As shown in FIGS. 2 and 3, the magnetic sensor 16 is introduced into the gap portion 17 a of the core 17 when the circuit board 11 is accommodated in the internal space 6 of the battery body 4. The magnetic sensor 16 detects the strength of the magnetic field generated in the core 17 by the current flowing through the battery post 2 on the negative electrode side.
温度センサ１５、電圧センサ１８及び磁気センサ１６により検出された信号は、図２及び図３に示すように、監視ＩＣ１３へ送られる。監視ＩＣ１３は、温度センサ１５、電圧センサ１８及び磁気センサ１６の出力信号に基づいてバッテリ本体４の残容量等のバッテリ状態を監視する。バッテリ本体４の残容量等のバッテリ状態信号は、車両ＥＣＵに送信される。 Signals detected by the temperature sensor 15, the voltage sensor 18 and the magnetic sensor 16 are sent to the monitoring IC 13 as shown in FIGS. 2 and 3. The monitoring IC 13 monitors the battery state such as the remaining capacity of the battery body 4 based on the output signals of the temperature sensor 15, the voltage sensor 18 and the magnetic sensor 16. A battery status signal such as the remaining capacity of the battery body 4 is transmitted to the vehicle ECU.
（第１の実施の形態の効果）
以上のように構成された第１の実施の形態に係るバッテリ状態測定装置１０は、バッテリ１の内部に取り付けられることから、以下の効果が得られる。 (Effects of the first embodiment)
Since the battery state measuring apparatus 10 according to the first embodiment configured as described above is attached to the inside of the battery 1, the following effects are obtained.
（１）外気温度の変化の影響を受けることなく、バッテリ１の内部空間６の温度を精度よく測定することができるため、バッテリ状態の推定精度を向上させることが可能となる。
（２）バッテリ１にバッテリセンサ１２を内蔵しているため、バッテリ１の組付作業性やサービス性等を向上させることができる。 (1) Since the temperature of the internal space 6 of the battery 1 can be accurately measured without being affected by changes in the outside air temperature, it is possible to improve the estimation accuracy of the battery state.
(2) Since the battery sensor 12 is built in the battery 1, the workability and serviceability of the battery 1 can be improved.
［第２の実施の形態］
図４及び図５には、第２の実施の形態に係るバッテリ状態測定装置１０の一例が模式的に例示されている。この第２の実施の形態にあっては、磁気センサ１６及びコア１７を用いた電流センサを除いて、他の構成は上記第１の実施の形態と同様の構成を備えている。 [Second Embodiment]
FIG. 4 and FIG. 5 schematically illustrate an example of the battery state measurement device 10 according to the second embodiment. In the second embodiment, except for the current sensor using the magnetic sensor 16 and the core 17, the other configurations are the same as those in the first embodiment.
従って、図４及び図５において、上記第１の実施の形態と実質的に同じ部材には同一の部材名と符号を付すことで、それらの部材に関する詳細な説明は省略する。 Therefore, in FIG. 4 and FIG. 5, the same members as those in the first embodiment are denoted by the same member names and reference numerals, and detailed description thereof will be omitted.
この第２の実施の形態に係るバッテリ状態測定装置１０は、図４及び図５に示すように、磁気センサ１６及びコア１７の代わりに、負極側のバッテリポスト２に流れる電流を測定するための抵抗値ＲＳで構成された電流検出用のシャント抵抗２０を用いている。 As shown in FIGS. 4 and 5, the battery state measuring apparatus 10 according to the second embodiment is for measuring the current flowing through the battery post 2 on the negative electrode side instead of the magnetic sensor 16 and the core 17. A current detection shunt resistor 20 having a resistance value RS is used.
シャント抵抗２０は、図４及び図５に示すように、負極側のバッテリポスト２の一部に設けられており、負極側のバッテリポスト２の一部がシャント抵抗部として構成されている。正極側のバッテリポスト３は、車載電装品やエンジン等の負荷９に電気的に接続されている。 4 and 5, the shunt resistor 20 is provided on a part of the negative battery post 2, and a part of the negative battery post 2 is configured as a shunt resistor. The battery post 3 on the positive electrode side is electrically connected to a load 9 such as an in-vehicle electrical component or an engine.
シャント抵抗２０には、図５に示すように、シャント抵抗２０の両端に発生する電圧の差分を増幅するアンプ２１が電気的に接続されている。アンプ２１は、シャント抵抗２０の両端に発生する電位差ΔＶを監視ＩＣ１３に出力する。負極側のバッテリポスト２に流れる電流は、監視ＩＣ１３において電流Ｉ（＝ΔＶ／ＲＳ）として算出される。 As shown in FIG. 5, the shunt resistor 20 is electrically connected to an amplifier 21 that amplifies a difference between voltages generated at both ends of the shunt resistor 20. The amplifier 21 outputs a potential difference ΔV generated at both ends of the shunt resistor 20 to the monitoring IC 13. The current flowing through the battery post 2 on the negative electrode side is calculated as current I (= ΔV / R S ) in the monitoring IC 13.
（第２の実施の形態の効果）
この第２の実施の形態に係るバッテリ状態測定装置１０は、上記第１の実施の形態と同様の効果に加えて、以下の効果を有する。 (Effect of the second embodiment)
The battery state measuring apparatus 10 according to the second embodiment has the following effects in addition to the same effects as those of the first embodiment.
（１）バッテリ１にバッテリセンサ１２等の電子部品を取り付ける機構が不要となるため、回路基板１１に搭載する電子部品の構成を簡略化することができるとともに、電子部品の搭載位置の設定の自由度を高めることができる。
（２）電子部品の搭載位置の設定の自由度を高めることができるため、検出精度及び検出効率等を向上させることができるとともに、設計の自由度を向上させることが可能となる。 (1) Since a mechanism for attaching an electronic component such as the battery sensor 12 to the battery 1 is not required, the configuration of the electronic component mounted on the circuit board 11 can be simplified and the setting position of the mounting position of the electronic component can be freely set. The degree can be increased.
(2) Since the degree of freedom in setting the mounting position of the electronic component can be increased, the detection accuracy and the detection efficiency can be improved, and the degree of freedom in design can be improved.
［変形例］
本発明におけるバッテリ状態測定装置１０の代表的な構成例を上記各実施の形態及び図示例を挙げて説明したが、本発明の技術思想の範囲内において種々の構成が可能であり、次に示すような変形例も可能である。 [Modification]
The typical configuration example of the battery state measuring apparatus 10 according to the present invention has been described with reference to the above embodiments and illustrated examples. However, various configurations are possible within the scope of the technical idea of the present invention, and are described below. Such a modification is also possible.
上記各実施の形態及び図示例では、回路基板１１にバッテリセンサ１２などの電子部品を搭載した構成を例示したが、これに限定されるものではなく、例えばリードフレームを電子部品の搭載部材として用いることで、ボンディング接続又はフリップチップ接続によってバッテリセンサ１２などの電子部品を電気接続する構成であっても構わない。リードフレームは、カバー部材５と一体成型することが可能である。 In each of the above-described embodiments and illustrated examples, the configuration in which electronic components such as the battery sensor 12 are mounted on the circuit board 11 is illustrated. However, the present invention is not limited to this. For example, a lead frame is used as a mounting member for the electronic components. Thus, the configuration may be such that electronic components such as the battery sensor 12 are electrically connected by bonding connection or flip chip connection. The lead frame can be integrally formed with the cover member 5.
上記第２の実施の形態では、負極側のバッテリポスト２の一部がシャント抵抗部として構成されていたが、これに限定されるものではなく、例えば負極側のバッテリポスト２の全部をシャント抵抗部として用いることができる。 In the second embodiment, a part of the battery post 2 on the negative electrode side is configured as the shunt resistor. However, the present invention is not limited to this. For example, the entire battery post 2 on the negative electrode side is connected to the shunt resistor. It can be used as a part.
バッテリセンサ１２などの電子部品は、使用目的などに応じて配置個数、配置位置や配置形態などを適宜に選択すればよく、本発明の初期の目的を達成することができることは勿論である。 The electronic components such as the battery sensor 12 may be appropriately selected in terms of the number of arrangement, the arrangement position, the arrangement form, and the like according to the purpose of use, and of course, the initial object of the present invention can be achieved.
上記バッテリ状態測定装置１０としては、バッテリを搭載する車両以外の各種機器にも適用することができることは勿論である。 As a matter of course, the battery state measuring device 10 can be applied to various devices other than a vehicle equipped with a battery.
以上の説明からも明らかなように、本発明に係る代表的な各実施の形態、変形例及び図示例を例示したが、上記各実施の形態、変形例及び図示例は特許請求の範囲に係る発明を限定するものではない。 As is clear from the above description, each of the exemplary embodiments, modifications, and illustrations according to the present invention has been illustrated. However, the above-described embodiments, modifications, and illustrations relate to the claims. The invention is not limited.
従って、上記各実施の形態、変形例及び図示例の中で説明した特徴の組合せの全てが発明の課題を解決するための手段に必須であるとは限らない点に留意すべきである。 Therefore, it should be noted that not all the combinations of features described in the above embodiments, modified examples, and illustrated examples are essential to the means for solving the problems of the invention.
本発明は、車載用バッテリに取り付けられて充電、劣化等のバッテリ状態を検知するために使用されるバッテリ状態測定装置に適用できる。 The present invention can be applied to a battery state measuring device that is attached to a vehicle-mounted battery and used to detect a battery state such as charging and deterioration.
１　バッテリ
２，３　バッテリポスト
４　バッテリ本体
５　カバー部材
５ａ　貫通孔
６　内部空間
１０　バッテリ状態測定装置
１１　回路基板
１２　バッテリセンサ
１５　温度センサ
１６　磁気センサ
１８　電圧センサ
２０　シャント抵抗 DESCRIPTION OF SYMBOLS 1 Battery 2, 3 Battery post 4 Battery main body 5 Cover member 5a Through-hole 6 Internal space 10 Battery state measuring apparatus 11 Circuit board 12 Battery sensor 15 Temperature sensor 16 Magnetic sensor 18 Voltage sensor 20 Shunt resistance

Claims (5)

  1. バッテリ本体の電流、温度及び電圧の少なくとも１つを検出するバッテリセンサと、
    前記バッテリセンサを搭載する搭載部材とを有し、
    前記搭載部材は、前記バッテリ本体上のカバー部材内側に取り付けられるバッテリ状態測定装置。     A battery sensor for detecting at least one of current, temperature and voltage of the battery body;
    A mounting member for mounting the battery sensor;
    The mounting member is a battery state measuring device attached to the inside of a cover member on the battery body.
  2. 前記バッテリセンサは、前記バッテリ本体のバッテリポストの外周に設けられたコアと、前記コア中に発生する磁界の大きさを検出する磁気センサとを有する、請求項１に記載のバッテリ状態測定装置。 The battery state measuring apparatus according to claim 1, wherein the battery sensor includes a core provided on an outer periphery of a battery post of the battery main body, and a magnetic sensor that detects a magnitude of a magnetic field generated in the core.
  3. 前記バッテリセンサは、前記バッテリ本体のバッテリポスト上にシャント抵抗部を有する、請求項１に記載のバッテリ状態測定装置。 The battery state measuring device according to claim 1, wherein the battery sensor has a shunt resistor portion on a battery post of the battery body.
  4. 前記搭載部材は、前記カバー部材の内表面に取り付けられる回路基板又はリードフレームを有する、請求項１に記載のバッテリ状態測定装置。 The battery state measuring device according to claim 1, wherein the mounting member includes a circuit board or a lead frame attached to an inner surface of the cover member.
  5. 上記請求項１～４のいずれか１項に記載のバッテリ状態測定装置を有するバッテリ。 A battery comprising the battery state measuring device according to any one of claims 1 to 4.
PCT/JP2015/060633 2014-06-04 2015-04-03 Battery state measuring device and battery provided with same WO2015186421A1 (en)

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