WO2016009773A1 - Battery monitoring device and battery monitoring system - Google Patents

Battery monitoring device and battery monitoring system Download PDF

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Publication number
WO2016009773A1
WO2016009773A1 PCT/JP2015/067318 JP2015067318W WO2016009773A1 WO 2016009773 A1 WO2016009773 A1 WO 2016009773A1 JP 2015067318 W JP2015067318 W JP 2015067318W WO 2016009773 A1 WO2016009773 A1 WO 2016009773A1
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WO
WIPO (PCT)
Prior art keywords
battery
liquid level
battery monitoring
unit
light
Prior art date
Application number
PCT/JP2015/067318
Other languages
French (fr)
Japanese (ja)
Inventor
均至 村木
Original Assignee
株式会社東海理化電機製作所
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Publication date
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Publication of WO2016009773A1 publication Critical patent/WO2016009773A1/en

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    • 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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/172—Arrangements of electric connectors penetrating the casing
    • H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
    • H01M50/176—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for prismatic or rectangular cells
    • 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
    • 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
    • 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
    • H01M50/543—Terminals
    • H01M50/547—Terminals characterised by the disposition of the terminals on the cells
    • H01M50/55—Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
    • 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
    • H01M50/543—Terminals
    • H01M50/552—Terminals characterised by their shape
    • H01M50/553—Terminals adapted for prismatic, pouch or rectangular cells
    • 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
    • H01M50/543—Terminals
    • H01M50/562—Terminals characterised by the material
    • 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 monitoring device and a battery monitoring system.
  • a current measuring means for measuring a current flowing through the battery a voltage measuring means for measuring a voltage of the battery, a current measuring means and a current measuring means and a voltage measuring means to estimate a charging state and a deterioration state of the battery
  • a battery having determination means for determining whether or not to start the engine of the vehicle and determining whether to replace the battery based on the estimated charged state and deteriorated state, and these means are arranged on the upper lid of the battery ( For example, see Patent Document 1).
  • Patent Literature 1 Since the battery disclosed in Patent Literature 1 can determine whether or not the engine of the vehicle can be started, the operator can check whether or not the engine of the vehicle can be started. Therefore, the operator can perform an idle stop start while confirming whether or not the engine can be started, even if the vehicle is not equipped with an idle stop start system that stops the engine each time it stops with a signal or the like.
  • An object of the present invention is to provide a battery monitoring device and a battery monitoring system that can be easily attached to a battery and can monitor the state of the battery by measuring the current and liquid level of the battery.
  • a battery monitoring device includes a bus bar that is attached to an electrode terminal of a battery and through which the battery current flows, and that measures a current flowing through the bus bar, and an electrolyte solution through the upper surface of the battery
  • a liquid level measuring unit that has a light emitting unit that outputs light to the liquid level and a light receiving unit that receives reflected light of the light reflected by the liquid level via the upper surface of the battery, and measures the height of the liquid level;
  • a battery monitoring device that can be easily attached to a battery and can monitor the state of the battery by measuring the current and liquid level of the battery.
  • FIG. 1A is an explanatory diagram illustrating the battery monitoring system according to the first embodiment.
  • FIG. 1B is a block diagram illustrating the battery monitoring device.
  • FIG. 2A is an explanatory diagram illustrating a positional relationship between the battery monitoring device and the battery according to the first embodiment.
  • FIG. 2B is an explanatory diagram showing a liquid level measurement method.
  • FIG. 2C is a block diagram illustrating a battery monitoring device of the battery monitoring system according to the second embodiment.
  • FIG. 3 is a flowchart for explaining the operation of the battery monitoring system according to the second embodiment.
  • the battery monitoring device includes a bus bar that is attached to the electrode terminal of the battery and through which the battery current flows, and a current measuring unit that measures the current flowing through the bus bar, and the electrolyte solution via the upper surface of the battery
  • a liquid level measuring unit for measuring the height of the liquid level by having a light emitting unit for outputting light to the surface, and a light receiving unit for receiving the reflected light of the light reflected by the liquid level via the upper surface of the battery, and current measurement
  • the current measuring unit and the liquid level measuring unit are housed in the casing, and the bus bar can be directly attached to the electrode terminal of the battery, so that it can be easily attached to the battery and the current of the battery
  • the battery level can be monitored by measuring the height of the liquid level.
  • FIG. 1A is an explanatory diagram illustrating a battery monitoring system according to the first embodiment
  • FIG. 1B is a block diagram illustrating a battery monitoring device
  • FIG. 2A is an explanatory diagram illustrating a positional relationship between the battery monitoring device and the battery according to the first embodiment
  • FIG. 2B is an explanatory diagram illustrating a liquid level measurement method.
  • FIG. 2B is a diagram viewed from the direction of arrow A in FIG. 2A. Note that, in each drawing according to the embodiment described below, the ratio between figures may be different from the actual ratio.
  • FIGS. 1B and 2C the flow of main signals and information is indicated by arrows.
  • the battery monitoring system 1 includes a battery 2 and a battery monitoring device 4.
  • the battery 2 is, for example, a lead storage battery.
  • the battery monitoring device 4 is attached to the battery 2 and monitors the current 2 a flowing through the battery 2 and the liquid level 205 a of the electrolyte 205 of the battery 2.
  • the battery monitoring system 1 is used in a hybrid vehicle having an engine and a motor as drive sources.
  • the battery monitoring system 1 includes a bus bar 41 that is attached to the electrode terminal of the battery 2 and through which the current 2a of the battery 2 flows.
  • a current sensor unit 45 as a current measuring unit to be measured
  • a light emitting unit 47 that outputs light (light 460) to the liquid surface 205a of the electrolytic solution 205 through the upper surface 22a of the battery 2, and light reflected by the liquid surface 205a
  • the battery monitoring device 4 includes a liquid level measuring unit 46 that has a light receiving unit 48 that receives reflected light (reflected light 461) through the upper surface 22a of the battery 2 and measures the height of the liquid level 205a.
  • the current sensor unit 45 and the liquid level measuring unit 46 are accommodated in the housing 40.
  • the bus bar 41 is attached to the negative terminal 23 as an electrode terminal.
  • the battery monitoring device 4 has a threshold value 490 for notifying that the liquid level 205a of the electrolytic solution 205 is lower than a predetermined liquid level, and the liquid level detected by the liquid level measuring unit 46 and the threshold value. comparing the 490, if the detected liquid level is determined to be lower than the liquid level predetermined, and a control unit 49 as a determination section for outputting alarm information S 5 for notifying.
  • the battery 2 includes a lower case 20 and an upper case 21 as shown in FIG. 1A.
  • the lower case 20 and the upper case 21 are formed using, for example, a resin material that is not exposed to the electrolytic solution 205 such as polypropylene (PP).
  • PP polypropylene
  • the upper case 21 for example, a negative terminal 23 and a positive terminal 24 formed into a cylindrical shape using a metal material such as lead are integrated by insert molding.
  • the negative terminal 23 is a negative electrode terminal of the battery 2, and the positive terminal 24 is a positive electrode terminal.
  • the negative terminal 23 is disposed on the first electrolytic cell 20a.
  • the positive terminal 24 is disposed on the sixth electrolytic cell 20f.
  • a vehicle cable is attached to the negative terminal 23 and the positive terminal 24.
  • the lower case 20 is divided into a first electrolytic cell 20a to a sixth electrolytic cell 20f.
  • the electrolytic solution 205 is injected so that the liquid level 205a to the liquid level 205f between the liquid level lower limit 200 and the liquid level upper limit 201 are reached.
  • one electrolytic cell generates a voltage of about 2V. Therefore, the battery 2 is configured to generate a voltage of approximately 12V, for example.
  • liquid supply ports 26a to 26f are formed corresponding to the first electrolytic cell 20a to the sixth electrolytic cell 20f.
  • Liquid supply plugs 27a to 27f are attached to the liquid supply ports 26a to 26f.
  • the battery 2 has an arc-shaped transmission region 25 centered on the negative terminal 23 formed on the upper surface 22 a of the upper case 21.
  • the transmission region 25 is a region through which the light 460 output from the light emitting unit 47 and the reflected light 461 reflected from the liquid surface 205a are transmitted.
  • the transmission region 25 is formed of a transparent resin material so that the light 460 and the reflected light 461 can be transmitted more easily than other regions.
  • the transmissive region 25 may be formed by forming an opening in the upper case 21 and fitting a transparent resin into the opening, or arranging a resin having a high light transmittance in the transmissive region 25 by two-color molding. You may do it.
  • the casing 40 is formed using a resin material, and the current sensor unit 45, the liquid level measurement unit 46, and the control unit 49 are accommodated therein.
  • the housing 40 has a bus bar 41 exposed from one side surface and a harness 42 exposed from the other side surface.
  • the harness 42 is electrically connected to a vehicle control unit of the vehicle. Supply of electric power for operating the battery monitoring device 4 and output of the current value information S 4 and the notification information S 5 are performed via the harness 42.
  • the current sensor unit 45 is a current sensor that detects a current 2a flowing through the bus bar 41 with a magnetic detection element.
  • This magnetic detection element is a Hall element, a magnetoresistive element, or the like that detects a change in the magnetic field generated around the bus bar 41 by the current 2 a flowing through the bus bar 41.
  • the magnetic detection element of the present embodiment is a Hall element. This Hall element is arranged in the vicinity of the bus bar 41, for example.
  • the current sensor unit 45 generates detection information S 1 based on the detection result of the current 2 a flowing through the bus bar 41 and outputs the detection information S 1 to the control unit 49.
  • the detection information S 1 is information of a current value of the current 2a.
  • the bus bar 41 is formed to have a long and thin plate shape by punching a conductive plate member such as copper, a copper alloy, or brass. As shown in FIGS. 2A and 2B, the bus bar 41 has an attachment portion 412 that can be attached to the negative terminal 23 of the battery 2. The attachment portion 412 is provided at the tip of the base portion 410.
  • the mounting portion 412 includes a ring portion 413 having a shape corresponding to the negative terminal 23.
  • the ring portion 413 is provided with a circular opening 414 into which the negative terminal 23 is inserted.
  • the ring portion 413 is formed with a notch, and an end portion facing the notch protrudes in the radial direction to form a fastening portion 415.
  • the fastening portion 415 is provided with through holes at opposite ends, and a bolt 55 is inserted so as to penetrate the through hole, and is bolted to the nut 56. By this bolt tightening, the interval between the fastening portions 415 is narrowed, and the negative terminal 23 is fastened by the ring portion 413, and the bus bar 41 is attached to the negative terminal 23.
  • the liquid level measurement unit 46 includes a light emitting unit 47 having a light emitting element 470 and a light receiving unit 48 having a light receiving element 480.
  • a light emitting element 470 a light-emitting diode, a laser diode, or the like can be used.
  • a laser diode is used as an example.
  • the light receiving element 480 is a photodiode as an example. That is, in the liquid level measuring unit 46, the light emitting unit 47 and the light receiving unit 48 constitute a laser displacement meter.
  • the liquid level measuring unit 46 is disposed so as to face the upper surface 22a of the battery 2. Specifically, the liquid level measuring unit 46 is disposed in the groove 43 provided on the back surface 40 a of the housing 40 of the battery monitoring device 4.
  • the groove 43 is formed so as to face the transmission region 25 of the battery 2.
  • the groove 43 has a substantially V-shaped cross section, and the light emitting surface 471 of the light emitting element 470 is exposed on one inclined surface 43a, and the light receiving surface 481 of the light receiving element 480 is exposed on the other inclined surface 43b.
  • the angles of the slope 43a and the slope 43b are determined based on the range of the height H to the liquid level 205a, for example.
  • the light emitting element 470 outputs the light 460 to the liquid level 205 a through the transmission region 25 of the upper case 21 based on the drive signal S 2 output from the control unit 49.
  • the control unit 49 includes, for example, a CPU (Central Processing Unit) that performs operations and processes on acquired data according to a stored program, a RAM (Random Access Memory) that is a semiconductor memory, a ROM (Read Only Memory), and the like. Microcomputer.
  • a program for operating the control unit 49 is stored.
  • the RAM is used as a storage area for temporarily storing calculation results and the like.
  • the control unit 49 has a threshold value 490 that indicates a predetermined height of the liquid level 205a.
  • the threshold value 490 is, for example, a height equal to or higher than the liquid level lower limit 200 and is determined as a distance from the center of the light receiving surface 481 of the light receiving element 480.
  • the threshold value 490 is, for example, a liquid level lower limit of 200 to 5 mm.
  • Control unit 49 based on the reception information S 3 obtained from the liquid level measurement unit 46 obtains the height H of the liquid level 205a shown in FIG. 2B, converts the height H of the liquid level 205a in the height The height of the converted liquid surface 205a is compared with the threshold value 490. Control unit 49, when the height of the converted liquid surface 205a is higher than the threshold 490, and generates and outputs notification information S 5 indicating a normal liquid level 205a to the vehicle control unit. The control unit 49, when the height of the converted liquid surface 205a is the threshold value 490 or less, creates broadcast information S 5 to the notification for prompting replenishment of electrolyte 205 outputs to the vehicle control unit.
  • Control unit 49 converts the detected information S 1 acquired from the current sensor 45 into a current value, and is configured to output to the vehicle control unit as a current value information S 4.
  • the battery monitoring device 4 of the battery monitoring system 1 measures the current 2a and the liquid level 205a, and starts monitoring the state of the battery 2.
  • the control unit 49 outputs a drive signal S 2 to the light emitting unit 47.
  • the control unit 49 acquires the detection information S 1 from the current sensor unit 45 and also acquires the light reception information S 3 from the light reception unit 48 of the liquid level measurement unit 46.
  • the control unit 49 obtains the converted height of the liquid surface 205a on the basis of the received information S 3, monitors the battery 2 liquid surface 205a on the basis of the height and the threshold 490 of the converted liquid surface 205a , creates broadcast information S 5 based on the comparison result, and outputs to the vehicle control unit via a harness 42.
  • the battery monitoring system 1 monitors the state of the battery 2 until the vehicle is powered off.
  • the battery monitoring device 4 of the battery monitoring system 1 can be easily attached to the battery 2 and can measure the current 2a and the liquid level 205a of the battery 2 to monitor the state of the battery 2. it can.
  • the current sensor unit 45 and the liquid level measuring unit 46 are accommodated in the housing 40 and the bus bar 41 is directly attached to the negative terminal 23 of the battery 2. Therefore, it is easy to mount and the current 2a and the liquid level 205a of the battery 2 can be measured to monitor the state of the battery 2.
  • the battery monitoring system 1 uses the battery 2 having the transmission region 25 that easily transmits the light 460 and the reflected light 461, the height of the liquid surface 205a is measured with higher accuracy than when the transmission region is not provided. can do.
  • the battery monitoring device 4 accommodates the current sensor unit 45 that detects the current 2 a flowing through the battery 2 and the liquid level measuring unit 46 that measures the height of the liquid level 205 a of the battery 2 in the housing 40. Compared with the case where the current sensor unit and the liquid level measuring unit are separately disposed, the size can be reduced and the manufacturing cost can be reduced.
  • the battery monitoring device 4 can easily position the liquid level measuring unit 46 and the battery 2 by attaching the mounting part 412 of the bus bar 41 to the negative terminal 23 of the battery 2. Further, since the transmission region 25 is provided along an arc centered on the negative terminal 23, the light 460 and the reflected light 461 are transmitted even if the battery monitoring device 4 rotates around the negative terminal 23 during the installation. The trouble which remove
  • the second embodiment is different from the first embodiment in that the battery monitoring system 1 includes a notification unit.
  • FIG. 2C is a block diagram illustrating a battery monitoring device of the battery monitoring system according to the second embodiment.
  • portions having the same functions and configurations as those of the first embodiment are denoted by the same reference numerals as those of the first embodiment, and description thereof is omitted.
  • the battery monitoring device 4 includes a notification unit 50 that performs notification based on notification information S ⁇ b> 5 output from the control unit 49.
  • the notification unit 50 is a warning light provided on an instrument panel on which vehicle instruments are arranged. Notification unit 50 is, for example, and is configured to illuminate a broadcast information S 5 is inputted.
  • the broadcast information S 5, the height of the liquid surface 205a is output from the control unit 49 when it is determined that the threshold value 490 or less.
  • the battery monitoring device 4 may be configured to notify via the notification unit 50 when the measured current 2a is lower than the reference.
  • the notification unit 50 includes a current warning lamp and a liquid level warning lamp.
  • the notification unit 50 includes at least one of a configuration for outputting sound, a configuration for vibrating a driver's seat, a steering wheel, and the like, and a configuration for displaying that the liquid level is low on the liquid crystal monitor of the navigation device. May be.
  • the battery monitoring device 4 measures the current 2a and the liquid level 205a, and starts monitoring the state of the battery 2 (S1). First, the control unit 49 outputs a drive signal S 2 to the light emitting unit 47.
  • the control unit 49 acquires the detection information S 1 from the current sensor unit 45 and also acquires the light reception information S 3 from the light reception unit 48 of the liquid level measurement unit 46.
  • control unit 49 generates a current value information S 4 based on the detected information S 1, and outputs to the vehicle control unit via a harness 42.
  • the vehicle control unit controls the charging of the battery 2 based on the control and regenerative energy of the engine and the motor based on the current value information S 4 acquired via the harness 42.
  • the control unit 49 obtains the converted height of the liquid surface 205a on the basis of the received information S 3, monitors the battery 2 liquid surface 205a on the basis of the height and the threshold 490 of the converted liquid surface 205a , creates broadcast information S 5 based on the comparison results, outputs to the vehicle control unit via a harness 42.
  • Control unit 49 when the height of the liquid surface 205a is the threshold value 490 or less (S2: Yes), creates broadcast information S 5 for notifying the low liquid level 205a outputs to notification unit 50.
  • Notification unit 50 notifies the user warning light is lit on the basis of the broadcast information S 5 obtained (S3).
  • step 2 when the measured liquid level 205a is above the threshold value 490 (S2: No), the control unit 49 returns to step 1 and continues measuring the current 2a and the liquid level 205a. .
  • the battery monitoring apparatus 4 of this Embodiment can alert
  • the battery 2 can be protected by replenishing the electrolyte 205 before the performance deteriorates or the liquid level 205a drops and the battery 2 is destroyed.
  • the battery 2 in which the transmissive region 25 is formed is used.
  • the present invention is not limited to this, and the battery 2 in which the upper case 21 is formed of a light transmissive resin that is not exposed to the electrolytic solution 205 is used.
  • the transmissive region 25 may not be formed.
  • the light-emitting portion 47 includes a light-emitting element 470 that outputs light 460 in the ultraviolet region where the resin has high transmittance. Even if there is no transmission region 25, the light receiving unit 48 can receive the reflected light 461.
  • the present invention can be applied to a battery monitoring device for monitoring the current flowing through the battery and the liquid level of the battery electrolyte.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Secondary Cells (AREA)
  • Tests Of Electric Status Of Batteries (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

A battery monitoring device is provided which can be easily mounted on a battery and which can monitor the battery state by measuring the fluid level and the current of the battery; a battery monitoring system is also provided. The battery monitoring device (4) of this battery monitoring system (1) comprises: a busbar (41) which is mounted on the negative terminal (23) of the battery (2) and conducts current (2a) of the battery (2); a current sensor unit (45) which measures the current (2a) flowing through the busbar (41); and a fluid level measuring unit (46) which measures the height of the fluid surface (205a) by means of a light-emitting unit (47) which outputs light (460) onto the fluid surface (205a) of the electrolyte (205) through the top surface (22a) of the battery (2) and a light-receiving unit (48) which, through the top surface (22a) of the battery (2), receives light (461) reflected on the fluid surface (205a).

Description

バッテリ監視装置及びバッテリ監視システムBattery monitoring device and battery monitoring system
本発明は、バッテリ監視装置及びバッテリ監視システムに関する。 The present invention relates to a battery monitoring device and a battery monitoring system.
電池に流れる電流を測定する電流測定手段と、電池の電圧を測定する電圧測定手段と、電流測定手段及び電圧測定手段で測定された電流及び電圧から電池の充電状態及び劣化状態を推定し、該推定した充電状態及び劣化状態に基づいて車両のエンジン始動の可否判定及び電池の交換判定を行う判定手段とを有し、これらの手段が電池の上蓋に配設された電池が知られている（例えば、特許文献１参照）。 A current measuring means for measuring a current flowing through the battery, a voltage measuring means for measuring a voltage of the battery, a current measuring means and a current measuring means and a voltage measuring means to estimate a charging state and a deterioration state of the battery, There is known a battery having determination means for determining whether or not to start the engine of the vehicle and determining whether to replace the battery based on the estimated charged state and deteriorated state, and these means are arranged on the upper lid of the battery ( For example, see Patent Document 1).
特許文献１に開示された電池は、車両のエンジン始動の可否を判定することができるので、操作者が車両のエンジン始動の可否を確認することができる。従って操作者は、車両が、信号等で止まる度にエンジンを停止させるアイドルストップスタートシステムを搭載していなくても、エンジン始動の可否を確認しながらアイドルストップスタートを行うことができる。 Since the battery disclosed in Patent Literature 1 can determine whether or not the engine of the vehicle can be started, the operator can check whether or not the engine of the vehicle can be started. Therefore, the operator can perform an idle stop start while confirming whether or not the engine can be started, even if the vehicle is not equipped with an idle stop start system that stops the engine each time it stops with a signal or the like.
特開２００９－９９４３０号公報JP 2009-99430 A
本発明の目的は、容易にバッテリに取り付けることができると共にバッテリの電流と液面の測定を行ってバッテリの状態を監視することができるバッテリ監視装置及びバッテリ監視システムを提供することにある。 An object of the present invention is to provide a battery monitoring device and a battery monitoring system that can be easily attached to a battery and can monitor the state of the battery by measuring the current and liquid level of the battery.
本発明の一実施形態によるバッテリ監視装置は、バッテリの電極端子に取り付けられると共にバッテリの電流が流れるバスバを有し、バスバを流れる電流を測定する電流測定部と、バッテリの上面を介して電解液の液面に光を出力する発光部、及び液面で反射した光の反射光をバッテリの上面を介して受光する受光部を有して液面の高さを測定する液面測定部と、電流測定部及び液面測定部が収容された筐体と、を有する。 A battery monitoring device according to an embodiment of the present invention includes a bus bar that is attached to an electrode terminal of a battery and through which the battery current flows, and that measures a current flowing through the bus bar, and an electrolyte solution through the upper surface of the battery A liquid level measuring unit that has a light emitting unit that outputs light to the liquid level and a light receiving unit that receives reflected light of the light reflected by the liquid level via the upper surface of the battery, and measures the height of the liquid level; A housing in which the current measuring unit and the liquid level measuring unit are accommodated.
本発明の一実施形態によれば、容易にバッテリに取り付けることができると共にバッテリの電流と液面の測定を行ってバッテリの状態を監視することができるバッテリ監視装置を提供することができる。 According to one embodiment of the present invention, it is possible to provide a battery monitoring device that can be easily attached to a battery and can monitor the state of the battery by measuring the current and liquid level of the battery.
図１Ａは、第１の実施の形態に係るバッテリ監視システムを示す説明図である。FIG. 1A is an explanatory diagram illustrating the battery monitoring system according to the first embodiment. 図１Ｂは、バッテリ監視装置を説明するブロック図である。FIG. 1B is a block diagram illustrating the battery monitoring device. 図２Ａは、第１の実施の形態に係るバッテリ監視装置とバッテリの位置関係を示す説明図である。FIG. 2A is an explanatory diagram illustrating a positional relationship between the battery monitoring device and the battery according to the first embodiment. 図２Ｂは、液面の測定方法を示す説明図である。FIG. 2B is an explanatory diagram showing a liquid level measurement method. 図２Ｃは、第２の実施の形態に係るバッテリ監視システムのバッテリ監視装置を説明するブロック図である。FIG. 2C is a block diagram illustrating a battery monitoring device of the battery monitoring system according to the second embodiment. 図３は、第２の実施の形態に係るバッテリ監視システムの動作を説明するフローチャートである。FIG. 3 is a flowchart for explaining the operation of the battery monitoring system according to the second embodiment.
（実施の形態の要約）
実施の形態に係るバッテリ監視装置は、バッテリの電極端子に取り付けられると共にバッテリの電流が流れるバスバを有し、バスバを流れる電流を測定する電流測定部と、バッテリの上面を介して電解液の液面に光を出力する発光部、及び液面で反射した光の反射光をバッテリの上面を介して受光する受光部を有して液面の高さを測定する液面測定部と、電流測定部及び液面測定部が収容された筐体と、を有する。 (Summary of embodiment)
The battery monitoring device according to the embodiment includes a bus bar that is attached to the electrode terminal of the battery and through which the battery current flows, and a current measuring unit that measures the current flowing through the bus bar, and the electrolyte solution via the upper surface of the battery A liquid level measuring unit for measuring the height of the liquid level by having a light emitting unit for outputting light to the surface, and a light receiving unit for receiving the reflected light of the light reflected by the liquid level via the upper surface of the battery, and current measurement And a housing in which the liquid level measuring unit is accommodated.
このバッテリ監視装置は、電流測定部と液面測定部とが筐体に収容されると共に、バスバをバッテリの電極端子に直接取り付けることができるので、容易にバッテリに取り付けることができると共にバッテリの電流と液面の高さの測定を行ってバッテリの状態を監視することができる。 In this battery monitoring device, the current measuring unit and the liquid level measuring unit are housed in the casing, and the bus bar can be directly attached to the electrode terminal of the battery, so that it can be easily attached to the battery and the current of the battery The battery level can be monitored by measuring the height of the liquid level.
[第１の実施の形態]
（バッテリ監視システム１の全体構成）
図１Ａは、第１の実施の形態に係るバッテリ監視システムを示す説明図であり、図１Ｂは、バッテリ監視装置を説明するブロック図である。図２Ａは、第１の実施の形態に係るバッテリ監視装置とバッテリの位置関係を示す説明図であり、図２Ｂは、液面の測定方法を示す説明図である。図２Ｂは、図２Ａの矢印Ａ方向から見た図である。なお、以下に記載する実施の形態に係る各図において、図形間の比率は、実際の比率とは異なる場合がある。また図１Ｂ及び２Ｃでは、主な信号や情報の流れを矢印で示している。 [First embodiment]
(Overall configuration of battery monitoring system 1)
FIG. 1A is an explanatory diagram illustrating a battery monitoring system according to the first embodiment, and FIG. 1B is a block diagram illustrating a battery monitoring device. FIG. 2A is an explanatory diagram illustrating a positional relationship between the battery monitoring device and the battery according to the first embodiment, and FIG. 2B is an explanatory diagram illustrating a liquid level measurement method. FIG. 2B is a diagram viewed from the direction of arrow A in FIG. 2A. Note that, in each drawing according to the embodiment described below, the ratio between figures may be different from the actual ratio. In FIGS. 1B and 2C, the flow of main signals and information is indicated by arrows.
バッテリ監視システム１は、バッテリ２と、バッテリ監視装置４と、を有する。このバッテリ２は、例えば、鉛蓄電池である。また、バッテリ監視装置４は、図１Ａに示されるように、バッテリ２に取り付けられて、バッテリ２に流れる電流２ａとバッテリ２の電解液２０５の液面２０５ａを監視するものである。このバッテリ監視システム１は、一例として、駆動源としてエンジンとモータを有するハイブリッド車に使用される。 The battery monitoring system 1 includes a battery 2 and a battery monitoring device 4. The battery 2 is, for example, a lead storage battery. As shown in FIG. 1A, the battery monitoring device 4 is attached to the battery 2 and monitors the current 2 a flowing through the battery 2 and the liquid level 205 a of the electrolyte 205 of the battery 2. As an example, the battery monitoring system 1 is used in a hybrid vehicle having an engine and a motor as drive sources.
具体的には、バッテリ監視システム１は、図１Ａ及び１Ｂに示されるように、バッテリ２の電極端子に取り付けられると共にバッテリ２の電流２ａが流れるバスバ４１を有し、バスバ４１を流れる電流２ａを測定する電流測定部としての電流センサ部４５と、バッテリ２の上面２２ａを介して電解液２０５の液面２０５ａに光（光４６０）を出力する発光部４７、及び液面２０５ａで反射した光の反射光（反射光４６１）をバッテリ２の上面２２ａを介して受光する受光部４８を有して液面２０５ａの高さを測定する液面測定部４６と、を有するバッテリ監視装置４を有する。この電流センサ部４５及び液面測定部４６は、筐体４０に収容されている。またバスバ４１は、電極端子としての負ターミナル２３に取り付けられる。 Specifically, as shown in FIGS. 1A and 1B, the battery monitoring system 1 includes a bus bar 41 that is attached to the electrode terminal of the battery 2 and through which the current 2a of the battery 2 flows. A current sensor unit 45 as a current measuring unit to be measured, a light emitting unit 47 that outputs light (light 460) to the liquid surface 205a of the electrolytic solution 205 through the upper surface 22a of the battery 2, and light reflected by the liquid surface 205a The battery monitoring device 4 includes a liquid level measuring unit 46 that has a light receiving unit 48 that receives reflected light (reflected light 461) through the upper surface 22a of the battery 2 and measures the height of the liquid level 205a. The current sensor unit 45 and the liquid level measuring unit 46 are accommodated in the housing 40. The bus bar 41 is attached to the negative terminal 23 as an electrode terminal.
またバッテリ監視装置４は、電解液２０５の液面２０５ａが予め定められた液面より低いことを報知するためのしきい値４９０を有し、液面測定部４６が検出した液面としきい値４９０とを比較し、検出した液面が予め定められた液面より低いと判定した場合、報知するための報知情報Ｓ５を出力する判定部としての制御部４９を有している。 Further, the battery monitoring device 4 has a threshold value 490 for notifying that the liquid level 205a of the electrolytic solution 205 is lower than a predetermined liquid level, and the liquid level detected by the liquid level measuring unit 46 and the threshold value. comparing the 490, if the detected liquid level is determined to be lower than the liquid level predetermined, and a control unit 49 as a determination section for outputting alarm information S 5 for notifying.
（バッテリ２の構成）
バッテリ２は、図１Ａに示されるように、下ケース２０と上ケース２１とを備えている。下ケース２０及び上ケース２１は、例えば、ポリプロピレン（ＰＰ）等の電解液２０５におかされない樹脂材料を用いて形成されている。上ケース２１は、例えば、鉛等の金属材料を用いて円柱形状に形成された負ターミナル２３及び正ターミナル２４がインサート成形により一体とされている。 (Configuration of battery 2)
The battery 2 includes a lower case 20 and an upper case 21 as shown in FIG. 1A. The lower case 20 and the upper case 21 are formed using, for example, a resin material that is not exposed to the electrolytic solution 205 such as polypropylene (PP). In the upper case 21, for example, a negative terminal 23 and a positive terminal 24 formed into a cylindrical shape using a metal material such as lead are integrated by insert molding.
負ターミナル２３は、バッテリ２の負電極端子であり、正ターミナル２４は、正電極端子である。負ターミナル２３は、第１の電解槽２０ａ上に配置されている。また正ターミナル２４は、第６の電解槽２０ｆ上に配置されている。この負ターミナル２３及び正ターミナル２４は、車両のケーブルが取り付けられる。 The negative terminal 23 is a negative electrode terminal of the battery 2, and the positive terminal 24 is a positive electrode terminal. The negative terminal 23 is disposed on the first electrolytic cell 20a. The positive terminal 24 is disposed on the sixth electrolytic cell 20f. A vehicle cable is attached to the negative terminal 23 and the positive terminal 24.
下ケース２０は、第１の電解槽２０ａ～第６の電解槽２０ｆに分かれている。この第１の電解槽２０ａ～第６の電解槽２０ｆには、電解液２０５が液面下限２００から液面上限２０１の間の液面２０５ａ～液面２０５ｆとなるように注入されている。ひとつの電解槽は、一例として、およそ２Ｖの電圧を発生させる。従ってバッテリ２は、例えば、およそ１２Ｖの電圧を発生させるように構成されている。 The lower case 20 is divided into a first electrolytic cell 20a to a sixth electrolytic cell 20f. In the first electrolytic cell 20a to the sixth electrolytic cell 20f, the electrolytic solution 205 is injected so that the liquid level 205a to the liquid level 205f between the liquid level lower limit 200 and the liquid level upper limit 201 are reached. For example, one electrolytic cell generates a voltage of about 2V. Therefore, the battery 2 is configured to generate a voltage of approximately 12V, for example.
上ケース２１には、第１の電解槽２０ａ～第６の電解槽２０ｆに応じて、給液口２６ａ～給液口２６ｆが形成されている。この給液口２６ａ～給液口２６ｆには、液口栓２７ａ～液口栓２７ｆが取り付けられている。電解液２０５を補充する場合は、補充する電解槽の液口栓を取り外して電解液２０５を電解槽に補充する。 In the upper case 21, liquid supply ports 26a to 26f are formed corresponding to the first electrolytic cell 20a to the sixth electrolytic cell 20f. Liquid supply plugs 27a to 27f are attached to the liquid supply ports 26a to 26f. When the electrolytic solution 205 is replenished, the electrolytic cap to be replenished is removed and the electrolytic solution 205 is replenished to the electrolytic bath.
バッテリ２は、図１Ａに示されるように、負ターミナル２３を中心とした円弧形状の透過領域２５が上ケース２１の上面２２ａに形成されている。この透過領域２５は、発光部４７から出力された光４６０、及び液面２０５ａを反射した反射光４６１が透過する領域である。 As shown in FIG. 1A, the battery 2 has an arc-shaped transmission region 25 centered on the negative terminal 23 formed on the upper surface 22 a of the upper case 21. The transmission region 25 is a region through which the light 460 output from the light emitting unit 47 and the reflected light 461 reflected from the liquid surface 205a are transmitted.
この透過領域２５は、例えば、光４６０及び反射光４６１が、他の領域よりも透過し易いように透明な樹脂材料により形成されている。例えば、透過領域２５は、上ケース２１に開口を形成し、この開口に透明な樹脂を嵌め込んで形成されても良いし、二色成形により透過領域２５に光の透過率が高い樹脂を配置しても良い。 For example, the transmission region 25 is formed of a transparent resin material so that the light 460 and the reflected light 461 can be transmitted more easily than other regions. For example, the transmissive region 25 may be formed by forming an opening in the upper case 21 and fitting a transparent resin into the opening, or arranging a resin having a high light transmittance in the transmissive region 25 by two-color molding. You may do it.
続いて、バッテリ監視装置４の構成について説明する。 Next, the configuration of the battery monitoring device 4 will be described.
（筐体４０の構成）
筐体４０は、樹脂材料を用いて形成され、電流センサ部４５、液面測定部４６及び制御部４９が内部に収容されている。筐体４０は、一方の側面からバスバ４１が露出し、他方の側面からハーネス４２が露出している。 (Configuration of casing 40)
The casing 40 is formed using a resin material, and the current sensor unit 45, the liquid level measurement unit 46, and the control unit 49 are accommodated therein. The housing 40 has a bus bar 41 exposed from one side surface and a harness 42 exposed from the other side surface.
このハーネス４２は、例えば、車両の車両制御部と電気的に接続されている。バッテリ監視装置４が作動するための電力の供給、電流値情報Ｓ４及び報知情報Ｓ５等の出力がハーネス４２を介して行われている。 For example, the harness 42 is electrically connected to a vehicle control unit of the vehicle. Supply of electric power for operating the battery monitoring device 4 and output of the current value information S 4 and the notification information S 5 are performed via the harness 42.
（電流センサ部４５の構成）
電流センサ部４５は、一例として、バスバ４１に流れる電流２ａを磁気検出素子で検出する電流センサである。この磁気検出素子は、バスバ４１に流れる電流２ａによって、バスバ４１の周囲に生じる磁場の変化を検出するホール素子及び磁気抵抗素子等である。本実施の形態の磁気検出素子は、ホール素子である。このホール素子は、例えば、バスバ４１の近傍に配置される。 (Configuration of current sensor unit 45)
As an example, the current sensor unit 45 is a current sensor that detects a current 2a flowing through the bus bar 41 with a magnetic detection element. This magnetic detection element is a Hall element, a magnetoresistive element, or the like that detects a change in the magnetic field generated around the bus bar 41 by the current 2 a flowing through the bus bar 41. The magnetic detection element of the present embodiment is a Hall element. This Hall element is arranged in the vicinity of the bus bar 41, for example.
電流センサ部４５は、バスバ４１に流れる電流２ａを検出した結果に基づいて検出情報Ｓ１を生成して制御部４９に出力する。この検出情報Ｓ１は、電流２ａの電流値の情報である。 The current sensor unit 45 generates detection information S 1 based on the detection result of the current 2 a flowing through the bus bar 41 and outputs the detection information S 1 to the control unit 49. The detection information S 1 is information of a current value of the current 2a.
バスバ４１は、例えば、銅、銅合金又は黄銅等の導電性を有する板部材を打ち抜いて長細い板形状となるように形成されている。このバスバ４１は、図２Ａ及び２Ｂに示されるように、バッテリ２の負ターミナル２３に取り付け可能な取付部４１２を有している。取付部４１２は、基部４１０の先端に設けられている。 The bus bar 41 is formed to have a long and thin plate shape by punching a conductive plate member such as copper, a copper alloy, or brass. As shown in FIGS. 2A and 2B, the bus bar 41 has an attachment portion 412 that can be attached to the negative terminal 23 of the battery 2. The attachment portion 412 is provided at the tip of the base portion 410.
取付部４１２は、負ターミナル２３に応じた形状を有するリング部４１３を備えている。このリング部４１３には、負ターミナル２３が挿入される円形の開口４１４が設けられている。 The mounting portion 412 includes a ring portion 413 having a shape corresponding to the negative terminal 23. The ring portion 413 is provided with a circular opening 414 into which the negative terminal 23 is inserted.
リング部４１３には、切欠きが形成され、さらに切欠きにおいて対向する端部が径方向に突出して締結部４１５が形成されている。この締結部４１５は、対向する端部にそれぞれ貫通孔が設けられ、貫通孔を貫通するようにボルト５５が挿入され、ナット５６にボルト締めされる。このボルト締めにより、締結部４１５の間隔が狭くなると共にリング部４１３により負ターミナル２３を締め付け、負ターミナル２３へのバスバ４１の取り付けが行われる。 The ring portion 413 is formed with a notch, and an end portion facing the notch protrudes in the radial direction to form a fastening portion 415. The fastening portion 415 is provided with through holes at opposite ends, and a bolt 55 is inserted so as to penetrate the through hole, and is bolted to the nut 56. By this bolt tightening, the interval between the fastening portions 415 is narrowed, and the negative terminal 23 is fastened by the ring portion 413, and the bus bar 41 is attached to the negative terminal 23.
なお、負ターミナル２３へのバスバ４１の取り付けにおいて、負ターミナル２３を中心にバスバ４１が回転しても、透過領域２５が負ターミナル２３を中心とする円弧形状を有するので、透過領域２５から液面測定部４６が配置された後述する溝部４３が外れることが抑制され、液面の測定に与える影響は少ない。 When the bus bar 41 is attached to the negative terminal 23, even if the bus bar 41 rotates around the negative terminal 23, the transmission region 25 has an arc shape centered on the negative terminal 23. It is suppressed that the groove part 43 mentioned later where the measurement part 46 is arrange | positioned is removed, and there is little influence which it has on the measurement of a liquid level.
（液面測定部４６の構成）
液面測定部４６は、図１Ｂに示されるように、発光素子４７０を有する発光部４７と、受光素子４８０を有する受光部４８と、を有する。発光素子４７０は、一例として、発光ダイオード及びレーザーダイオード等を用いることが可能である。本実施の形態では、一例として、レーザーダイオードを用いる。受光素子４８０は、一例として、フォトダイオードである。つまり、この液面測定部４６は、発光部４７と受光部４８とでレーザー変位計を構成している。 (Configuration of the liquid level measuring unit 46)
As shown in FIG. 1B, the liquid level measurement unit 46 includes a light emitting unit 47 having a light emitting element 470 and a light receiving unit 48 having a light receiving element 480. As an example of the light-emitting element 470, a light-emitting diode, a laser diode, or the like can be used. In this embodiment, a laser diode is used as an example. The light receiving element 480 is a photodiode as an example. That is, in the liquid level measuring unit 46, the light emitting unit 47 and the light receiving unit 48 constitute a laser displacement meter.
液面測定部４６は、バッテリ２の上面２２ａに対向するように配置される。具体的には、液面測定部４６は、バッテリ監視装置４の筐体４０の裏面４０ａに設けられた溝部４３に配置されている。 The liquid level measuring unit 46 is disposed so as to face the upper surface 22a of the battery 2. Specifically, the liquid level measuring unit 46 is disposed in the groove 43 provided on the back surface 40 a of the housing 40 of the battery monitoring device 4.
この溝部４３は、図２Ａに示されるように、バッテリ２の透過領域２５に対向するように形成されている。溝部４３は、断面が略Ｖ字形状を有しており、一方の斜面４３ａに発光素子４７０の発光面４７１が露出し、他方の斜面４３ｂに受光素子４８０の受光面４８１が露出している。この斜面４３ａ及び斜面４３ｂの角度は、例えば、液面２０５ａまでの高さＨの範囲に基づいて定められている。 As shown in FIG. 2A, the groove 43 is formed so as to face the transmission region 25 of the battery 2. The groove 43 has a substantially V-shaped cross section, and the light emitting surface 471 of the light emitting element 470 is exposed on one inclined surface 43a, and the light receiving surface 481 of the light receiving element 480 is exposed on the other inclined surface 43b. The angles of the slope 43a and the slope 43b are determined based on the range of the height H to the liquid level 205a, for example.
発光部４７は、制御部４９から出力される駆動信号Ｓ２に基づいて、発光素子４７０が光４６０を、上ケース２１の透過領域２５を介して液面２０５ａに出力する。また受光部４８は、液面２０５ａを反射した反射光４６１を、上ケース２１の透過領域２５を介して受光すると、受光した反射光４６１の反射光量に基づいた受光情報Ｓ３を生成し、制御部４９に出力する。 In the light emitting unit 47, the light emitting element 470 outputs the light 460 to the liquid level 205 a through the transmission region 25 of the upper case 21 based on the drive signal S 2 output from the control unit 49. The light receiving unit 48, the reflected light 461 reflected by the liquid surface 205a, when receiving through the transmission region 25 of the upper case 21, generates reception information S 3 based on the reflected light amount of the reflected light 461 that is received, the control To the unit 49.
（制御部４９の構成）
制御部４９は、例えば、記憶されたプログラムに従って、取得したデータに演算、加工等を行うＣＰＵ（Central Processing Unit）、半導体メモリであるＲＡＭ（Random Access Memory）及びＲＯＭ（Read Only Memory）等から構成されるマイクロコンピュータである。このＲＯＭには、例えば、制御部４９が動作するためのプログラムが格納されている。ＲＡＭは、例えば、一時的に演算結果等を格納する記憶領域として用いられる。 (Configuration of control unit 49)
The control unit 49 includes, for example, a CPU (Central Processing Unit) that performs operations and processes on acquired data according to a stored program, a RAM (Random Access Memory) that is a semiconductor memory, a ROM (Read Only Memory), and the like. Microcomputer. In this ROM, for example, a program for operating the control unit 49 is stored. For example, the RAM is used as a storage area for temporarily storing calculation results and the like.
制御部４９は、予め定められた液面２０５ａの高さを示すしきい値４９０を有する。このしきい値４９０は、一例として、液面下限２００以上の高さであり、受光素子４８０の受光面４８１の中央からの距離として定められている。しきい値４９０は、一例として、液面下限２００から５ｍｍである。 The control unit 49 has a threshold value 490 that indicates a predetermined height of the liquid level 205a. The threshold value 490 is, for example, a height equal to or higher than the liquid level lower limit 200 and is determined as a distance from the center of the light receiving surface 481 of the light receiving element 480. The threshold value 490 is, for example, a liquid level lower limit of 200 to 5 mm.
制御部４９は、液面測定部４６から取得した受光情報Ｓ３に基づいて、図２Ｂに示される液面２０５ａの高さＨを求め、この高さＨを液面２０５ａの高さに変換し、変換した液面２０５ａの高さとしきい値４９０とを比較する。制御部４９は、変換した液面２０５ａの高さがしきい値４９０よりも高い場合、正常な液面２０５ａであることを示す報知情報Ｓ５を生成して車両制御部に出力する。また制御部４９は、変換した液面２０５ａの高さがしきい値４９０以下である場合、電解液２０５の補充を促すための報知をさせる報知情報Ｓ５を生成して車両制御部に出力する。 Control unit 49, based on the reception information S 3 obtained from the liquid level measurement unit 46 obtains the height H of the liquid level 205a shown in FIG. 2B, converts the height H of the liquid level 205a in the height The height of the converted liquid surface 205a is compared with the threshold value 490. Control unit 49, when the height of the converted liquid surface 205a is higher than the threshold 490, and generates and outputs notification information S 5 indicating a normal liquid level 205a to the vehicle control unit. The control unit 49, when the height of the converted liquid surface 205a is the threshold value 490 or less, creates broadcast information S 5 to the notification for prompting replenishment of electrolyte 205 outputs to the vehicle control unit.
制御部４９は、例えば、電流センサ部４５から取得した検出情報Ｓ１を電流値に変換し、電流値情報Ｓ４として車両制御部に出力するように構成されている。 Control unit 49, for example, converts the detected information S 1 acquired from the current sensor 45 into a current value, and is configured to output to the vehicle control unit as a current value information S 4.
以下に、バッテリ監視システム１の動作について説明する。 Below, operation | movement of the battery monitoring system 1 is demonstrated.
（動作）
バッテリ監視システム１のバッテリ監視装置４は、車両の電源が投入されると、電流２ａを測定すると共に液面２０５ａを測定してバッテリ２の状態の監視を開始する。まず、制御部４９は、発光部４７に駆動信号Ｓ２を出力する。 (Operation)
When the vehicle power is turned on, the battery monitoring device 4 of the battery monitoring system 1 measures the current 2a and the liquid level 205a, and starts monitoring the state of the battery 2. First, the control unit 49 outputs a drive signal S 2 to the light emitting unit 47.
制御部４９は、電流センサ部４５から検出情報Ｓ１を取得すると共に、液面測定部４６の受光部４８から受光情報Ｓ３を取得する。 The control unit 49 acquires the detection information S 1 from the current sensor unit 45 and also acquires the light reception information S 3 from the light reception unit 48 of the liquid level measurement unit 46.
次に、制御部４９は、検出情報Ｓ１に基づいて電流値情報Ｓ４を生成し、ハーネス４２を介して車両制御部に出力する。車両制御部は、ハーネス４２を介して取得した電流値情報Ｓ４に基づいてエンジン及びモータの制御や回生エネルギーに基づくバッテリ２の充電等の制御を行う。 Next, the control unit 49 generates a current value information S 4 based on the detected information S 1, and outputs to the vehicle control unit via a harness 42. The vehicle control unit controls the charging of the battery 2 based on the control and regenerative energy of the engine and the motor based on the current value information S 4 acquired via the harness 42.
また、制御部４９は、受光情報Ｓ３に基づいて液面２０５ａの変換した高さを求め、変換した液面２０５ａの高さとしきい値４９０とに基づいてバッテリ２の液面２０５ａの監視を行い、比較結果に基づいた報知情報Ｓ５を生成し、ハーネス４２を介して車両制御部に出力する。 The control unit 49 obtains the converted height of the liquid surface 205a on the basis of the received information S 3, monitors the battery 2 liquid surface 205a on the basis of the height and the threshold 490 of the converted liquid surface 205a , creates broadcast information S 5 based on the comparison result, and outputs to the vehicle control unit via a harness 42.
バッテリ監視システム１は、車両の電源が遮断されるまで、バッテリ２の状態の監視を行う。 The battery monitoring system 1 monitors the state of the battery 2 until the vehicle is powered off.
（第１の実施の形態の効果）
本実施の形態に係るバッテリ監視システム１のバッテリ監視装置４は、容易にバッテリ２に取り付けることができると共にバッテリ２の電流２ａと液面２０５ａの測定を行ってバッテリ２の状態を監視することができる。具体的には、バッテリ監視システム１のバッテリ監視装置４は、電流センサ部４５と液面測定部４６とが筐体４０に収容されると共に、バスバ４１をバッテリ２の負ターミナル２３に直接取り付けることができるので、取り付けが容易であると共にバッテリ２の電流２ａと液面２０５ａの測定を行ってバッテリ２の状態を監視することができる。 (Effects of the first embodiment)
The battery monitoring device 4 of the battery monitoring system 1 according to the present embodiment can be easily attached to the battery 2 and can measure the current 2a and the liquid level 205a of the battery 2 to monitor the state of the battery 2. it can. Specifically, in the battery monitoring device 4 of the battery monitoring system 1, the current sensor unit 45 and the liquid level measuring unit 46 are accommodated in the housing 40 and the bus bar 41 is directly attached to the negative terminal 23 of the battery 2. Therefore, it is easy to mount and the current 2a and the liquid level 205a of the battery 2 can be measured to monitor the state of the battery 2.
バッテリ監視システム１は、光４６０及び反射光４６１を透過し易い透過領域２５を有するバッテリ２を使用するので、透過領域が設けられていない場合と比べて、液面２０５ａの高さを精度良く測定することができる。 Since the battery monitoring system 1 uses the battery 2 having the transmission region 25 that easily transmits the light 460 and the reflected light 461, the height of the liquid surface 205a is measured with higher accuracy than when the transmission region is not provided. can do.
バッテリ監視装置４は、バッテリ２に流れる電流２ａを検出する電流センサ部４５と、バッテリ２の液面２０５ａの高さを測定する液面測定部４６と、を筐体４０に収容しているので、電流センサ部と液面測定部とが別々に配置される場合と比べて、小型化ができると共に製造コストが低減される。 Since the battery monitoring device 4 accommodates the current sensor unit 45 that detects the current 2 a flowing through the battery 2 and the liquid level measuring unit 46 that measures the height of the liquid level 205 a of the battery 2 in the housing 40. Compared with the case where the current sensor unit and the liquid level measuring unit are separately disposed, the size can be reduced and the manufacturing cost can be reduced.
バッテリ監視装置４は、バッテリ２の負ターミナル２３にバスバ４１の取付部４１２を取り付けることで液面測定部４６とバッテリ２の位置決めを容易に行うことができる。また透過領域２５が負ターミナル２３を中心とした円弧に沿って設けられているので、取り付けの際にバッテリ監視装置４が負ターミナル２３の周りを回転しても光４６０及び反射光４６１が透過領域２５を外れる不具合を抑制することができる。 The battery monitoring device 4 can easily position the liquid level measuring unit 46 and the battery 2 by attaching the mounting part 412 of the bus bar 41 to the negative terminal 23 of the battery 2. Further, since the transmission region 25 is provided along an arc centered on the negative terminal 23, the light 460 and the reflected light 461 are transmitted even if the battery monitoring device 4 rotates around the negative terminal 23 during the installation. The trouble which remove | deviates from 25 can be suppressed.
［第２の実施の形態］
第２の実施の形態は、バッテリ監視システム１が報知部を有する点で第１の実施の形態と異なっている。 [Second Embodiment]
The second embodiment is different from the first embodiment in that the battery monitoring system 1 includes a notification unit.
図２Ｃは、第２の実施の形態に係るバッテリ監視システムのバッテリ監視装置を説明するブロック図である。なお以下に記載する実施の形態において、第１の実施の形態と同じ機能及び構成を有する部分は、第１の実施の形態と同じ符号を付し、その説明を省略する。 FIG. 2C is a block diagram illustrating a battery monitoring device of the battery monitoring system according to the second embodiment. In the embodiments described below, portions having the same functions and configurations as those of the first embodiment are denoted by the same reference numerals as those of the first embodiment, and description thereof is omitted.
本実施の形態のバッテリ監視装置４は、図２Ｃに示されるように、制御部４９から出力された報知情報Ｓ５に基づいて報知を行う報知部５０を有している。 As shown in FIG. 2C, the battery monitoring device 4 according to the present embodiment includes a notification unit 50 that performs notification based on notification information S <b> 5 output from the control unit 49.
この報知部５０は、一例として、車両の計器類が配置されるインストルメントパネルに設けられた警告灯である。報知部５０は、例えば、報知情報Ｓ５が入力すると点灯するように構成されている。 As an example, the notification unit 50 is a warning light provided on an instrument panel on which vehicle instruments are arranged. Notification unit 50 is, for example, and is configured to illuminate a broadcast information S 5 is inputted.
この報知情報Ｓ５は、液面２０５ａの高さがしきい値４９０以下であると判定された場合に制御部４９から出力される。なお変形例として、バッテリ監視装置４は、測定された電流２ａが基準よりも低い場合等に報知部５０を介して報知する構成としても良い。この場合、一例として、報知部５０は、電流用の警告灯と液面用の警告灯を備えている。 The broadcast information S 5, the height of the liquid surface 205a is output from the control unit 49 when it is determined that the threshold value 490 or less. As a modification, the battery monitoring device 4 may be configured to notify via the notification unit 50 when the measured current 2a is lower than the reference. In this case, as an example, the notification unit 50 includes a current warning lamp and a liquid level warning lamp.
さらに変形例として、報知部５０は、例えば、音を出力する構成、運転席やステアリング等を振動させる構成、及びナビゲーション装置の液晶モニタに液面が低いことを表示させる構成の少なくとも１つを備えていても良い。 Furthermore, as a modification, the notification unit 50 includes at least one of a configuration for outputting sound, a configuration for vibrating a driver's seat, a steering wheel, and the like, and a configuration for displaying that the liquid level is low on the liquid crystal monitor of the navigation device. May be.
以下に、本実施の形態のバッテリ監視システム１の動作について図３のフローチャートに従って説明する。 Below, operation | movement of the battery monitoring system 1 of this Embodiment is demonstrated according to the flowchart of FIG.
（動作）
バッテリ監視装置４は、車両の電源が投入されると、電流２ａを測定すると共に液面２０５ａを測定してバッテリ２の状態の監視を開始する（Ｓ１）。まず、制御部４９は、発光部４７に駆動信号Ｓ２を出力する。 (Operation)
When the power of the vehicle is turned on, the battery monitoring device 4 measures the current 2a and the liquid level 205a, and starts monitoring the state of the battery 2 (S1). First, the control unit 49 outputs a drive signal S 2 to the light emitting unit 47.
制御部４９は、電流センサ部４５から検出情報Ｓ１を取得すると共に、液面測定部４６の受光部４８から受光情報Ｓ３を取得する。 The control unit 49 acquires the detection information S 1 from the current sensor unit 45 and also acquires the light reception information S 3 from the light reception unit 48 of the liquid level measurement unit 46.
次に、制御部４９は、検出情報Ｓ１に基づいて電流値情報Ｓ４を生成し、ハーネス４２を介して車両制御部に出力する。車両制御部は、ハーネス４２を介して取得した電流値情報Ｓ４に基づいてエンジン及びモータの制御や回生エネルギーに基づくバッテリ２の充電等の制御を行う。 Next, the control unit 49 generates a current value information S 4 based on the detected information S 1, and outputs to the vehicle control unit via a harness 42. The vehicle control unit controls the charging of the battery 2 based on the control and regenerative energy of the engine and the motor based on the current value information S 4 acquired via the harness 42.
また、制御部４９は、受光情報Ｓ３に基づいて液面２０５ａの変換した高さを求め、変換した液面２０５ａの高さとしきい値４９０とに基づいてバッテリ２の液面２０５ａの監視を行い、比較結果に基づいた報知情報Ｓ５を生成し、ハーネス４２を介して車両制御部に出力する。 The control unit 49 obtains the converted height of the liquid surface 205a on the basis of the received information S 3, monitors the battery 2 liquid surface 205a on the basis of the height and the threshold 490 of the converted liquid surface 205a , creates broadcast information S 5 based on the comparison results, outputs to the vehicle control unit via a harness 42.
制御部４９は、液面２０５ａの高さがしきい値４９０以下である場合（Ｓ２：Ｙｅｓ）、液面２０５ａが低いことを報知するための報知情報Ｓ５を生成して報知部５０に出力する。 Control unit 49, when the height of the liquid surface 205a is the threshold value 490 or less (S2: Yes), creates broadcast information S 5 for notifying the low liquid level 205a outputs to notification unit 50.
報知部５０は、取得した報知情報Ｓ５に基づいて警告灯を点灯してユーザに報知する（Ｓ３）。 Notification unit 50 notifies the user warning light is lit on the basis of the broadcast information S 5 obtained (S3).
ここで、ステップ２において、制御部４９は、測定された液面２０５ａがしきい値４９０より上である場合（Ｓ２：Ｎｏ）、ステップ１に戻って電流２ａと液面２０５ａの測定を継続する。 Here, in step 2, when the measured liquid level 205a is above the threshold value 490 (S2: No), the control unit 49 returns to step 1 and continues measuring the current 2a and the liquid level 205a. .
（第２の実施の形態の効果）
本実施の形態のバッテリ監視装置４は、報知部５０によってユーザにバッテリ２の液面２０５ａの高さが低いことを報知することができる。従って、ユーザは、車両の点検時に液面の点検を行わなかったとしても、バッテリ２の液面２０５ａの高さが液面下限２００より下がる前に報知により認識することができるので、バッテリ２の性能が低下したり、液面２０５ａが下がってバッテリ２が破壊されたりする前に電解液２０５を補充してバッテリ２を保護することができる。 (Effect of the second embodiment)
The battery monitoring apparatus 4 of this Embodiment can alert | report that the height of the liquid level 205a of the battery 2 is low by the alerting | reporting part 50 to a user. Therefore, even if the user does not check the liquid level at the time of inspection of the vehicle, the user can recognize by the notification before the height of the liquid level 205a of the battery 2 falls below the liquid level lower limit 200. The battery 2 can be protected by replenishing the electrolyte 205 before the performance deteriorates or the liquid level 205a drops and the battery 2 is destroyed.
（他の実施の形態）
上述の実施の形態では、透過領域２５が形成されたバッテリ２を用いていたが、これに限定されず、電解液２０５におかされない光透過性樹脂で上ケース２１が形成されているバッテリ２の場合には、透過領域２５が形成されていなくても良い。一例として、上ケース２１が光透過性樹脂であるＰＰ（ポリプロピレン）で形成されている場合、発光部４７が、樹脂の透過力が高い紫外線領域の光４６０を出力する発光素子４７０を有することで、透過領域２５がなくても反射光４６１を受光部４８が受光することが可能となる。 (Other embodiments)
In the above-described embodiment, the battery 2 in which the transmissive region 25 is formed is used. However, the present invention is not limited to this, and the battery 2 in which the upper case 21 is formed of a light transmissive resin that is not exposed to the electrolytic solution 205 is used. In some cases, the transmissive region 25 may not be formed. As an example, when the upper case 21 is formed of PP (polypropylene) which is a light-transmitting resin, the light-emitting portion 47 includes a light-emitting element 470 that outputs light 460 in the ultraviolet region where the resin has high transmittance. Even if there is no transmission region 25, the light receiving unit 48 can receive the reflected light 461.
以上、本発明のいくつかの実施の形態及び変形例を説明したが、これらの実施の形態及び変形例は、一例に過ぎず、特許請求の範囲に係る発明を限定するものではない。これら新規な実施の形態及び変形例は、その他の様々な形態で実施されることが可能であり、本発明の要旨を逸脱しない範囲で、種々の省略、置き換え、変更等を行うことができる。また、これら実施の形態及び変形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。さらに、これら実施の形態及び変形例は、発明の範囲及び要旨に含まれるとともに、特許請求の範囲に記載された発明とその均等の範囲に含まれる。 As mentioned above, although some embodiment and modification of this invention were demonstrated, these embodiment and modification are only examples, and do not limit the invention based on a claim. These novel embodiments and modifications can be implemented in various other forms, and various omissions, replacements, changes, and the like can be made without departing from the scope of the present invention. In addition, not all combinations of features described in these embodiments and modifications are necessarily essential to the means for solving the problems of the invention. Furthermore, these embodiments and modifications are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.
本発明は、バッテリに流れる電流とバッテリの電解液の液面を監視するためのバッテリ監視装置に適用できる。 The present invention can be applied to a battery monitoring device for monitoring the current flowing through the battery and the liquid level of the battery electrolyte.
１ バッテリ監視システム
２ バッテリ
４　バッテリ監視装置
２５　透過領域
４０　筐体
４１　バスバ
４５　電流センサ部
４６　液面測定部
４７　発光部
４８　受光部
４９　制御部
５０　報知部
４１２　取付部
４９０　しきい値 DESCRIPTION OF SYMBOLS 1 Battery monitoring system 2 Battery 4 Battery monitoring apparatus 25 Transmission area 40 Case 41 Bus bar 45 Current sensor part 46 Liquid level measurement part 47 Light emission part 48 Light reception part 49 Control part 50 Notification part 412 Attachment part 490 Threshold value

Claims (8)

  1. バッテリの電極端子に取り付けられると共に前記バッテリの電流が流れるバスバを有し、前記バスバを流れる前記電流を測定する電流測定部と、
    前記バッテリの上面を介して電解液の液面に光を出力する発光部、及び前記液面で反射した前記光の反射光を前記バッテリの前記上面を介して受光する受光部を有して前記液面の高さを測定する液面測定部と、
    前記電流測定部及び前記液面測定部が収容された筐体と、を有するバッテリ監視装置。     A bus bar that is attached to the electrode terminal of the battery and through which the current of the battery flows, and a current measuring unit that measures the current flowing through the bus bar;
    A light emitting unit that outputs light to a liquid surface of an electrolytic solution through the upper surface of the battery; and a light receiving unit that receives reflected light of the light reflected by the liquid surface through the upper surface of the battery. A liquid level measuring unit for measuring the height of the liquid level;
    A battery monitoring device comprising: a housing in which the current measuring unit and the liquid level measuring unit are housed.
  2. 前記バスバは、前記バッテリの前記電極端子に取り付け可能な取付部を有する、請求項１に記載のバッテリ監視装置。 The battery monitoring device according to claim 1, wherein the bus bar has an attachment portion attachable to the electrode terminal of the battery.
  3. 前記電解液の前記液面が予め定められた液面より低いことを報知するためのしきい値を有し、前記液面測定部が検出した液面と前記しきい値とを比較し、前記検出した液面が前記予め定められた液面より低いと判定した場合、報知するための報知情報を出力する判定部を有する、請求項１又は２に記載のバッテリ監視装置。 It has a threshold value for notifying that the liquid level of the electrolytic solution is lower than a predetermined liquid level, and compares the liquid level detected by the liquid level measuring unit with the threshold value, The battery monitoring apparatus according to claim 1, further comprising: a determination unit that outputs notification information for notification when it is determined that the detected liquid level is lower than the predetermined liquid level.
  4. 前記判定部から出力された前記報知情報に基づいて報知を行う報知部を有する、請求項３に記載のバッテリ監視装置。 The battery monitoring device according to claim 3, further comprising a notification unit that performs notification based on the notification information output from the determination unit.
  5. 前記発光部は、紫外線領域の光を出力する発光素子を有する、請求項１に記載のバッテリ監視装置。 The battery monitoring device according to claim 1, wherein the light emitting unit includes a light emitting element that outputs light in an ultraviolet region.
  6. 請求項１～４のいずれか１項に記載の前記バッテリ監視装置と、
    前記発光部から出力された前記光、及び前記反射光の透過率が他の領域よりも高い透過領域が前記上面に設けられた前記バッテリと、を有するバッテリ監視システム。     The battery monitoring device according to any one of claims 1 to 4,
    A battery monitoring system comprising: the light provided from the light emitting unit; and the battery provided with a transmissive region having higher transmittance of the reflected light than other regions on the upper surface.
  7. 前記筐体は、前記液面測定部が前記上面に対向するように前記バッテリの前記上面に配置される、請求項６に記載のバッテリ監視システム。 The battery monitoring system according to claim 6, wherein the casing is disposed on the upper surface of the battery such that the liquid level measurement unit faces the upper surface.
  8. 前記透過領域は、前記バッテリの前記電極端子を中心とする円弧形状を有する、請求項６に記載のバッテリ監視システム。 The battery monitoring system according to claim 6, wherein the transmission region has an arc shape centered on the electrode terminal of the battery.
PCT/JP2015/067318 2014-07-16 2015-06-16 Battery monitoring device and battery monitoring system WO2016009773A1 (en)

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