WO2011122460A1 - 電池システム - Google Patents
電池システム Download PDFInfo
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- WO2011122460A1 WO2011122460A1 PCT/JP2011/057296 JP2011057296W WO2011122460A1 WO 2011122460 A1 WO2011122460 A1 WO 2011122460A1 JP 2011057296 W JP2011057296 W JP 2011057296W WO 2011122460 A1 WO2011122460 A1 WO 2011122460A1
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- WIPO (PCT)
- Prior art keywords
- terminal
- battery system
- electrode
- protruding piece
- insertion hole
- Prior art date
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- 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
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- 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
- H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R11/00—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts
- H01R11/11—End pieces or tapping pieces for wires, supported by the wire and for facilitating electrical connection to some other wire, terminal or conductive member
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R11/00—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts
- H01R11/11—End pieces or tapping pieces for wires, supported by the wire and for facilitating electrical connection to some other wire, terminal or conductive member
- H01R11/22—End pieces terminating in a spring clip
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R11/00—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts
- H01R11/11—End pieces or tapping pieces for wires, supported by the wire and for facilitating electrical connection to some other wire, terminal or conductive member
- H01R11/28—End pieces consisting of a ferrule or sleeve
- H01R11/281—End pieces consisting of a ferrule or sleeve for connections to batteries
- H01R11/282—End pieces consisting of a ferrule or sleeve for connections to batteries comprising means for facilitating engagement or disengagement, e.g. quick release terminal
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/28—Clamped connections, spring connections
- H01R4/50—Clamped connections, spring connections utilising a cam, wedge, cone or ball also combined with a screw
- H01R4/5016—Clamped connections, spring connections utilising a cam, wedge, cone or ball also combined with a screw using a cone
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- 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
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
- H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
- H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
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- 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
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/218—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material
- H01M50/22—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material of the casings or racks
- H01M50/227—Organic material
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- 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
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/503—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the shape of the interconnectors
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- 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
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/509—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the type of connection, e.g. mixed connections
- H01M50/51—Connection only in series
-
- 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
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/514—Methods for interconnecting adjacent batteries or cells
- H01M50/517—Methods for interconnecting adjacent batteries or cells by fixing means, e.g. screws, rivets or bolts
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Definitions
- the present invention relates to a battery system.
- This application claims priority based on Japanese Patent Application No. 2010-074908 filed in Japan on March 29, 2010, the contents of which are incorporated herein by reference.
- an electric measurement line including an annular plate-like contact portion is used to measure a parameter value of a single cell.
- the contact portion of the electric measurement line is fixed using, for example, an electrode terminal and a screw of the single cell, and the parameter value of the single cell is measured by the electric measurement line through the contact portion fixed to the electrode terminal by the screw.
- a contact portion of the electric measurement line is inserted between the bolt and the bus bar for fixing the bus bar (conductor) connecting the electrode terminals of a plurality of adjacent unit cells. The contact portion is fixed by tightening with a bolt.
- JP 2006-136070 A JP-A-11-111358
- Patent Document 2 when measuring the parameter value of a single cell (battery), the contact portion of the electric measurement line is connected and fixed to the electrode terminal by being tightened with a screw, so that the contact is made by loosening of the screw or the like. Resistance will change.
- the contact part of the electrical measurement line when the contact part of the electrical measurement line is connected and fixed to the upper part of the bus bar with a bolt, in addition to the change in contact resistance due to loosening of the bolt, the change in contact resistance between the bus bar and the electrode terminal must be considered. Don't be.
- the contact resistance of the electrical measurement line is connected and fixed using screws or bolts, so the contact resistance changes due to loosening of the screws or bolts. Cannot be avoided, and there has been a problem that a measurement error occurs when the parameter value of the unit cell is measured. Further, the connection / fixing with screws and bolts is complicated, and there is a problem that it is difficult to perform the connection / fixing process in a short time.
- the present invention has been made in view of such circumstances, and its purpose is to easily connect and fix the electric measurement line and the electrode terminal, and to set parameter values such as the current value and voltage value of the unit cell.
- An object of the present invention is to provide a battery system capable of accurately measuring the current.
- the present invention employs the following means. That is, the battery system according to the present invention includes an assembled battery including a plurality of unit cells having electrode terminals, a C-type first terminal inserted through the electrode terminal, and the first terminal and the electric battery. A second terminal connected to the measurement line; and a measurement unit connected to the electric measurement line to measure the parameters of the assembled battery. At least a part of the inner periphery of the first terminal is the electrode terminal.
- the first terminal is fixed to the electrode terminal by including a hole portion and fitting the insertion hole portion and the protruding piece to reduce the diameter of the first terminal.
- the inner peripheral portion of the first terminal includes the terminal body that contacts the electrode terminal, the first terminal is attached to the electrode terminal without interposing a bus bar or the like, and without tightening a bolt or a screw.
- the parameter value of the cell can be measured by fixing. Thereby, contact resistance can be reduced and a measurement error can be suppressed, and the parameter value of a single cell can be measured more correctly.
- the first terminal is reduced in diameter, and the contact state between the first terminal and the electrode terminal is fixed. Thereby, the first terminal can be easily attached to the electrode terminal.
- connection terminal unit when measuring the parameter value of the unit cell, the connection terminal unit is not fixed by tightening a bolt or a screw, so that a change in contact resistance can be suppressed.
- the parameter value of the unit cell can be accurately measured by easily attaching and fixing the connecting terminal unit to the electrode terminal.
- FIG. 1 is a top cross-sectional view of an assembled battery 1 according to a battery system of a first embodiment of the present invention. It is a perspective view of the principal part of the assembled battery 1 which concerns on the battery system of 1st embodiment of this invention. It is an assembly composition perspective view of electrode terminal 10 and connecting terminal unit 20 concerning a battery system of a first embodiment of the present invention. It is a top view of the 1st terminal 21 concerning the battery system of a first embodiment of the present invention. 5 to 7 are component diagrams of the first terminal 21 and show a state where the second terminal 31 is not fitted.
- FIG. 1 is a side sectional view of the assembled battery 1 used in the battery system 100 of the first embodiment of the present invention shown in FIG. 12, and FIG. 2 is a top sectional view of the assembled battery shown in FIG.
- FIG. 2 is a perspective view of a main part of the assembled battery shown in FIG. 1.
- the assembled battery 1 is provided with a plurality of unit cells 2 that are chargeable / dischargeable secondary batteries, and includes a power source for the battery system 100, for example, a power source for driving a moving object such as a deep sea exploration device or an electric vehicle Or it is used for the power supply which stationary apparatuses, such as an electric power storage apparatus and an uninterruptible power supply, supply.
- the battery system 100 includes an electric load 103 such as an electric motor, an assembled battery in which two assembled batteries 1 that supply electric power to the electric load 103 are connected in series, and a plurality of single cells (secondary batteries) constituting the assembled battery 1. ) CMUs (Cell Monitoring Units) 112a and 112b that receive analog signals corresponding to the respective parameters (for example, voltages) 2A to 2F via the corresponding electric measurement lines 19, and information on the parameters from these CMUs. A BMU (Battery Management Unit) 113 to be received and a host control device 104 that controls the power load 103 based on the information from the BMU 113 or displays the information on the operator or driver via the display unit 105. Yes.
- an electric load 103 such as an electric motor
- an assembled battery in which two assembled batteries 1 that supply electric power to the electric load 103 are connected in series
- CMUs Cell Monitoring Units
- the assembled battery 1 is schematically configured by a plurality of unit cells 2, a control unit 4 that controls the unit cells 2, and a storage container 5 that stores the unit cells 2 and the control unit 4. .
- the storage container 5 includes a lower housing 6 in which the unit cell 2 and the control unit 4 are stored and is formed in a bottomed rectangular tube shape and has an opening 6 a, and the lower housing 6.
- the upper housing 7 is a lid that opens and closes the opening 6a. Both the lower housing 6 and the upper housing 7 are made of an insulating material such as synthetic resin.
- the lower housing 6 has a rectangular shape in plan view of the bottom wall portion 8.
- the lower housing 6 is provided with a partition wall 6b that divides the inside of the lower housing 6 into two in the longitudinal direction, and the unit cell chamber 9a in which the plurality of unit cells 2 are accommodated, and the control unit 4 A control chamber 9b to be accommodated is formed.
- the single battery 2 is a secondary battery such as a lithium ion secondary battery formed in a rectangular parallelepiped shape, for example. As shown in FIG. 2, the single battery 2 is spaced at equal intervals in the longitudinal direction. Arranged on the bottom wall 8 in the chamber 9a. 3, illustration of other members of the storage container 5 (portions other than the bottom wall portion 8 of the lower housing 6) is omitted.
- the upper surface 2c of the unit cell 2 is provided with a pair of electrode terminals 10 that are formed in a columnar shape and project upward. One electrode terminal 10 is a positive electrode and the other electrode terminal 10 is a negative electrode. ing.
- the plurality of adjacent unit cells 2 are arranged such that the positions of the positive electrode and the negative electrode of the electrode terminal 10 are alternately arranged in the longitudinal direction.
- the electrode terminals 10 of the adjacent unit cells 2 are electrically connected in series by a plate-like bus bar 11 formed of a conductive material.
- the electrode terminals 10 not connected to the adjacent unit cells 2 are connected to one end of the bus bar 11.
- the other end of the bus bar 11 is inserted into an insertion hole 7 a formed in, for example, the upper housing 7 of the storage container 5 and exposed to the outside, and each of them serves as a positive electrode or a negative electrode of the assembled battery 1.
- a positive electrode and a negative electrode of an assembled battery in which two assembled batteries 1 are connected in series are connected to a power load 103 described later.
- the bus bar 11 has bolt insertion holes 11a at both ends. And the bolt 13 is each inserted through the insertion hole 11a of this both ends, Thereby, the electrode terminal 10 and the bus-bar 11 are bolted.
- the control unit 4 is a control circuit formed on, for example, a substrate, and is housed in the control unit chamber 9b.
- the control unit 4 is, for example, CMUs 112a and 112b, and the voltage value from the unit cell 2 to which the control unit 4 is connected (in FIG. 2, the control unit 4 is connected to four unit cells 2).
- the acquired parameter value is transmitted to a BMU (Battery Management Unit) 113 (CMU or BMU is also referred to as a measurement unit).
- a voltage value will be described as an example of the parameter value of the unit cell 2.
- FIG. 12 the control unit 4 is, for example, CMUs 112a and 112b, and the voltage value from the unit cell 2 to which the control unit 4 is connected (in FIG. 2, the control unit 4 is connected to four unit cells 2).
- BMU Battery Management Unit
- a voltage value will be described as an example of the parameter value of the unit cell 2.
- FIG. 12 the control unit 4 is, for example, CMUs 112a
- the connecting terminal unit 20 including the first terminal 21 and the second terminal 31 connected to one end of the electric measurement line 19 described later is only the one provided in the unit cell 2 at one end in the longitudinal direction. It is shown. However, in practice, a connecting terminal unit 20 is provided for each unit cell 2, and the other end of each electric measurement line 19 is connected to the CMU 112 a or 112 b. That is, illustration of what was provided in the other cell 2 is abbreviate
- FIG. 4 is an assembled configuration perspective view of the electrode terminal 10 and the connection terminal unit 20.
- the connection terminal unit 20 is electrically coupled to the first terminal 21 inserted through the electrode terminal 10 and the electric measurement line 19 connected to the control unit 4 and the first terminal 21. And the second terminal 31 to be fitted.
- FIG. 5 is a plan view of the first terminal 21 (viewed from the X direction in FIG. 1)
- FIG. 6 is a front view of the first terminal 21 (viewed from the Y direction in FIG. 1).
- FIG. 7 is a side view of the first terminal 21 (viewed from the Z direction in FIG. 1).
- 5 to 7 are component diagrams of the first terminal 21 and show a state where the second terminal 31 is not fitted.
- the first terminal 21 includes a terminal body 22 and a pair of protruding pieces 23 and 24.
- the first terminal 21 is made of a highly conductive metal member (for example, copper).
- the terminal body 22 is formed in a C-shaped annular shape, and one end 22 c and the other end 22 d are opposed to each other with a gap C therebetween.
- the terminal body 22 includes three protrusions 22e that protrude inward in the radial direction on the inner peripheral surface (inner peripheral portion) 22b.
- the three protrusions 22e are annularly arranged at equal intervals in the circumferential direction at intervals.
- the pair of projecting pieces 23, 24 are radially outward of the terminal main body 22 from one end 22 c side and the other end 22 d side of the outer peripheral surface (outer peripheral portion) 22 a of the terminal main body 22. It protrudes toward the side.
- the protruding pieces 23 and 24 are each formed in a substantially trapezoidal shape that is tapered when viewed from the X direction in FIG.
- the inner side surface 23a of the protruding piece 23 is formed flush with the end surface of the one end 22c (the end surface of the one end 22c and the inner side surface 23a are on the same plane).
- the inner surface 24a of the protruding piece 24 is formed flush with the end surface of the other end 22d.
- the inner side surface 23a and the inner side surface 24a extend outward in the radial direction with substantially the same gap as the gap C.
- the gap C enables a diameter reduction described later.
- the outer surface (outer portion) 23b of the projecting piece 23 facing away from each other and the outer surface (outer portion) 24b of the projecting piece 24 are respectively extended from the base ends 23c and 24c to the distal ends 23d and 24d.
- the dimension D between the outer portions at the distal ends 23d and 24d is D 1 and the base ends 23c and 24c.
- the projecting pieces 23 and 24 include corrugated portions 23 f and 24 f in which at least a part of the respective back surfaces 23 e and 24 e are formed in a corrugated shape.
- the wavy portions 23f and 24f can be formed, for example, by making a part of the mold wavy when the terminal body 22 is formed of a mold or the like.
- the second terminal 31 is of a class generally referred to as a flat crimp terminal (female type), and a crimp part 32 that is crimped to one end of the electric measurement line 19, A fitting portion 33 that fits with the first terminal 21 is provided.
- the crimping part 32 and the fitting part 33 are electrically connected, and are integrally formed of, for example, the same metal member (for example, copper).
- the second terminal 31 is also made of a metal member having good conductivity (for example, copper).
- the fitting portion 33 includes an insertion hole portion 34 into which the protruding pieces 23 and 24 of the first terminal are fitted.
- the insertion hole portion 34 is centered in the width direction by a partition wall 34 c, and holes 34 a and 34 b into which the protruding pieces 23 and 24 can be inserted are formed. That is, when the opening dimension in the width direction of the insertion hole 34 is L (see FIG. 8), D 1 ⁇ L ⁇ D 2 is satisfied.
- the plate thickness t of the partition wall 34c is sufficiently smaller than the gap C described above.
- Protruding portions 35 and 36 protrude from inner peripheral surfaces 34d and 34e in the holes 34a and 34b, respectively (see FIGS. 8 and 10).
- the cross-sectional shape in opening of hole 34a, 34b is a semicircle shape in this embodiment.
- the fitting member 33 and the partition wall 34c are formed by bending and deforming the metal member, which was originally substantially flat, from both sides into a semicircular shape. At this time, the semicircular cross-sectional shape is obtained. .
- the cross-sectional shape is not limited to a semicircular shape, and the metal member may be deformed so as to be similar to the shapes of the tips 23d and 24d of the protruding pieces 23 and 24, respectively. Accordingly, the protruding pieces 23 and 24 can be inserted into the insertion hole 34 while ensuring a contact area between the insertion hole 34 and the protruding pieces 23 and 24.
- connection method of the connection terminal unit 20 which consists of said structure, and operation
- the terminal body 22 of the first terminal 21 is inserted along the outer peripheral surface 10 a of the electrode terminal 10, while the insertion holes of the second terminal 31 are inserted into the tips 23 d and 24 d of the protruding pieces 23 and 24.
- the opening of the part 34 is made to oppose.
- the second terminal 31 is moved relative to the first terminal 21, and the tips 23 d and 24 d are inserted into the holes 34 a and 34 b of the insertion hole 34, respectively.
- the second terminal 31 reaches the position of the dimension D between the outer portions that is equal to the dimension L of the insertion hole 34.
- the projecting pieces 23 and 24 are close to each other so that the outer dimension D is equal to the opening dimension L of the insertion hole 34.
- the terminal body 22 is reduced in diameter.
- the second terminal 31 when the second terminal 31 is relatively moved to the terminal body 22 side and the terminal body 22 is further reduced in diameter, the three protrusions 22e are brought into contact with the outer peripheral surface 10a of the electrode terminal 10 at three points and then pressed against the outer peripheral surface 10a. To be crushed. By this crushing, the contact area between the electrode terminal 10 and the terminal body 22 is increased, and the resistance between the electrode terminal 10 and the terminal body 22 can be lowered. Further, since the contact is maintained in a state where the three protrusions 22e are crushed, the contact resistance can be stabilized without changing. In this way, the second terminal 31 is sufficiently pushed into the terminal body 22 side to increase the frictional force between the projecting pieces 23 and 24 and the inner peripheral surfaces 34d and 34e, respectively. To complete the mating. At this time, the partition wall 34c is pressed from both the inner side surfaces 23a and 24a, and a relatively strong frictional force is obtained.
- the wavy portions 23f and 24f and the protruding portions 35 and 36 are engaged. That is, as shown in FIG. 10, when the second terminal 31 is moved relative to the terminal body 22 side from the state where the tips 23d and 24d are inserted into the holes 34a and 34b, the concave portions on the wavy portions 23f and 24f side are formed. The protrusions 35 and 36 are engaged with each other. Thereafter, by further moving the second terminal 31 toward the terminal body 22 side, as shown in FIG. 11, the protruding portions 35 and 36 are formed on the base ends 23c and 24c side of the wavy portions 23f and 24f. It is shifted and engaged in order to the recessed part.
- the connection terminal unit 20 is attached to the electrode terminal 10. Since the terminal body 22 contacts the outer peripheral surface 10a of the electrode terminal 10 with sufficient pressure due to the reduced diameter of the terminal body 22, the contact resistance between the terminal body 22 and the electrode terminal 10 can be sufficiently reduced, and the wavy portion 23f, Since the protrusions 35 and 36 are engaged with the recesses on the 24f side, the reduced diameter state is firmly maintained, which is useful when performing precise parameter measurement such as voltage and current measurement.
- the first terminal 21 includes the terminal body 22 that contacts the outer peripheral surface 10 a of the electrode terminal 10. Therefore, the first terminal 21 directly contacts the electrode terminal 10 without contacting the bus bar 11.
- the voltage value can be measured. Thereby, it is possible to reduce the contact resistance and suppress measurement errors, and it is possible to accurately measure parameters such as voltage values of the individual cells 2 (2A to 2F) constituting the assembled battery.
- the BMU 113 Based on the accurate measurement value, the BMU 113 identifies, for example, an abnormal cell 2 and transmits the information to the host control device 104 in the battery system, and the host control device 104 that has received the information transmits an error signal. Transmit to the display unit 105.
- the display part 105 which received the said abnormality signal notifies an operator or a driver
- the host control device 104 limits the power of the assembled battery 1 supplied to the load of the battery system. That is, since an accurate parameter can be measured, the safety of the battery system can be further improved.
- the first terminal 21 includes a pair of projecting pieces 23 and 24 in which the dimension D between the outer portions 23b and 24b facing away from each other gradually increases from the distal ends 23d and 24d toward the base ends 23c and 24c.
- connection terminal unit 20 can be attached to the electrode terminal 10 relatively easily.
- the first terminal 21 includes corrugated portions 23f and 24f formed in corrugations on the back surfaces 23e and 24e of the projecting pieces 23 and 24, respectively, and the second terminal 31 projects to engage with the corrugated portions 23f and 24f. Since the portions 35 and 36 are provided, the fitted state between the first terminal 21 and the second terminal 31 is difficult to be released. Thereby, vibration resistance can further be improved and the accurate measurement of the voltage value of the cell 2 can be performed more continuously.
- the inner peripheral surface 22b of the terminal body 22 has three protrusions 22e, and the electrode terminal 10 and the three crushed protrusions 22e are in contact with each other, so that the contact between the outer peripheral surface 10a of the electrode terminal 10 and the terminal body 22 is reduced. While ensuring, the value of contact resistance can be stabilized. Thereby, it becomes possible to measure the voltage value of the cell 2 without a measurement error.
- the protrusion 22e When the protrusion 22e is covered with an oxide film or is coated with impurities such as dirt, the film is broken by the crushing of the protrusion 22e, so that the electrical contact between the electrode terminal 10 and the first terminal 21 is prevented. In addition, the stability of contact resistance can be ensured.
- the plurality of protrusions 22e are provided.
- the inner peripheral surface 22b may be brought into contact with the electrode terminal 10 without providing the protrusions 22e.
- the crushing can surely make a good electrical connection, but in the case of a design specification that does not require such a good electrical connection, the terminal is connected to the electrode terminal on the inner peripheral surface 22b due to the reduced diameter. This is because it is possible to reliably make an electrical connection only by contact. According to this, the cost for providing the protrusion 22e on the terminal body 22 can be reduced.
- the three protrusions 22e are provided. However, one or two protrusions may be provided, or four or more protrusions may be provided.
- unit cells 2 are provided, and these unit cells 2 are electrically connected in series.
- the present invention is not limited to this, and the number of unit cells 2 may be more or less than four.
- the voltage value of the unit cell 2 is measured using the connection terminal unit 20, but the current value may be measured.
- the current value may be measured using any one of the unit cells 2 using the connection terminal unit 20.
- the wavy portions 23f and 24f are formed on both the protruding pieces 23 and 24, but may be formed only on one side. Furthermore, the positions where the wavy portions 23f and 24f are formed are not limited to the back surfaces 23e and 24e of the protruding pieces 23 and 24, and may be formed on the upper surfaces or the outer surfaces 23b and 24b of the protruding pieces 23 and 24, for example. You may form a wave-like part in at least one part of these outer peripheral surfaces (the said upper surface, back surface, and outer surface) of the protrusion pieces 23 and 24. FIG. In these cases, the protruding portion of the second terminal 31 is formed at a position where the wavy portion is engaged.
- the first terminal 21 may be provided with a protruding portion and the second terminal 31 may be provided with a corrugated portion. Further, even if there are no wavy portions and protrusions, the protrusions and the wavy portions are not necessarily provided when the reduced diameter state can be maintained only by the frictional force between the protruding pieces 23 and 24 and the inner peripheral surfaces 34d and 34e. No, you may omit it as appropriate.
- the partition wall 34c is formed in the insertion hole 34 and the holes 34a and 34b are formed.
- the partition wall 34c may be omitted.
- the shape of the terminal body 22 is a C-shaped annular shape.
- the shape may be a C-shaped polygonal shape and can be in contact with the electrode terminal 10 on the inner peripheral surface of the terminal body 22. That's fine.
- the protruding pieces 23 and 24 are a pair of protruding pieces, but one or more protruding pieces may be provided in accordance with the shape of the terminal body 22.
- connection terminal unit when measuring the parameter value of the unit cell, the connection terminal unit is not fixed by tightening a bolt or a screw, so that a change in contact resistance can be suppressed.
- the parameter value of the unit cell can be accurately measured by easily attaching and fixing the connecting terminal unit to the electrode terminal.
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Abstract
Description
本願は、2010年3月29日に日本出願された特願2010-074908に基づいて優先権を主張し、その内容をここに援用する。
また、電気計測線の他の固定方法としては、隣接する複数の単電池の電極端子同士を連結するバスバー(導電体)を固定するボルトとバスバーとの間に電気計測線の接触部が挿通され、この接触部をボルトで締め付けることにより固定される。
さらに、バスバーの上部に電気計測線の接触部がボルトにより接続・固定される場合には、ボルトの緩みによる接触抵抗の変化に加え、バスバーと電極端子との接触抵抗の変化も考慮しなければならない。
すなわち、上述したいずれの手法により電気計測線を接続・固定したとしても、ネジやボルトを用いて電気計測線の接触部を接続・固定しているため、ネジやボルトの緩みによる接触抵抗の変化は避けることができず、単電池のパラメータ値を計測する場合に計測誤差が生じてしまうという問題があった。また、ネジやボルトでの上記接続・固定は煩雑であり、短時間での当該接続・固定の処理が困難という問題もあった。
すなわち、本発明に係る電池システムは、電極端子を有する複数の単電池を具備する組電池と、前記電極端子に挿通されるC型の第1端子と、前記第1端子と嵌合すると共に電気計測線に接続された第2端子と、前記電気計測線に接続され前記組電池のパラメータを計測する計測部とを有し、前記第1端子は、少なくとも内周部の一部が前記電極端子に接触する端子本体と、前記端子本体の外周部から前記端子本体の径方向外方側に向けて突出する2つの突出片とを備え、前記第2端子は、前記突出片が嵌合する挿入孔部を備え、前記挿入孔部と前記突出片とが嵌合して前記第1端子が縮径することで、前記第1端子が前記電極端子に固定される。
また、容易に連結端子ユニットを電極端子に装着かつ固定して単電池のパラメータ値を正確に計測することが可能となる。
(第一実施形態)
図1は、図12で示す本発明の第一実施形態の電池システム100で用いる組電池1の側面断面図であり、図2は、図1に示す組電池の上面断面図であり、図3は、図1に示す組電池の要部の斜視図である。
組電池1は、充放電可能な二次電池である単電池2が複数設けられたものであって、電池システム100の電源、例えば、深海探査機や電気自動車等の移動体の駆動用電源、或いは電力貯蔵装置や無停電電源装置等の定置用装置が供給する電源に用いられる。
電池システム100は、電気モータ等の電力負荷103と、電力負荷103に電力供給を行う組電池1が2つ直列接続された組電池と、組電池1を構成する複数の単電池(二次電池)2A~2Fのそれぞれのパラメータ(例えば電圧)に対応するアナログ信号を各々に対応する電気計測線19を介して受信するCMU(Cell Monitoring Unit)112a、112bと、これらCMUから上記パラメータに関する情報を受信するBMU(Battery Management Unit)113と、BMU113からの当該情報に基づき、電力負荷103を制御または当該情報をオペレータ又は運転者に表示部105を介して表示等させる上位制御装置104とを備えている。
図1および2に示すように、収納容器5は、単電池2及び制御部4が収納されると共に有底角筒状に形成されて開口部6aを有する下部筐体6と、下部筐体6の開口部6aを開閉する蓋体である上部筐体7とを備えており、これらの下部筐体6及び上部筐体7は、いずれも例えば合成樹脂等の絶縁体で形成されている。
この下部筐体6には、下部筐体6の内部を長手方向に二つに仕切る仕切壁6bが設けられており、複数の単電池2が収容される単電池室9aと、制御部4が収容される制御部室9bとが形成されている。
単電池2の上面2cには、円柱状に形成されると共に上方に向けて突出する一対の電極端子10が設けられており、一方の電極端子10が正極、他方の電極端子10が負極となっている。
複数の単電池2のうち長手方向の両端に配置された単電池2においては、図2に示すように、隣接する単電池2と接続されていない電極端子10がバスバー11の一端に接続され、バスバー11の他端は収納容器5の例えば上部筐体7に形成された挿通孔7aにそれぞれ挿通されて外部に露出され、それぞれが組電池1の正極又は負極となっている。組電池1が2つ直列接続された組電池の正極と負極は、後述の電力負荷103に接続される。
なお、図2においては、後述の第1端子21及び電気計測線19の一端に接続された第2端子31からなる連結端子ユニット20は、長手方向一端の単電池2に設けられたものだけを図示している。しかしながら、実際には各単電池2毎に連結端子ユニット20が設けられており、それぞれの電気計測線19の他端がCMU112a又は112bに接続されている。すなわち、ここでは他の単電池2に設けられたものの図示を省略している。
図4に示すように、連結端子ユニット20は、電極端子10側に挿通される第1端子21と、制御部4に接続された電気計測線19に電気的に結合されると共に第1端子21と嵌合する第2端子31とからなっている。
図5~図7に示すように、本実施形態では、第1端子21は、端子本体22と、一対の突出片23,24とを備えている。この第1端子21は、導電性の良好な金属部材(例えば、銅)からなっている。
この端子本体22は、内周面(内周部)22bにおいてそれぞれ径方向内側に突出する三つの突起22eを備えている。この三つの突起22eは、互いに間隔を空けて周方向に等間隔で環状に配置されている。
突出片23、24は、図1におけるX方向から見た際にそれぞれ先細りの略台形状に形成され、間隙Cを挟んで対称的に配置されている。
なお、この間隙Cにより、後述の縮径が可能となる。
挿入孔部34は、それぞれ突出片23、24の先端23d、24dにおける外側部間寸法D1よりも大きく、基端23c、24cにおける外側部間寸法D2よりも小さく開口している(図8参照)。
この挿入孔部34は、図4に示すように、中央が仕切壁34cによって幅方向に区画されており、突出片23、24をそれぞれ挿入可能な孔34a、34bが形成されている。
すなわち、この挿入孔部34の幅方向の開口寸法をLとすると(図8参照)、D1<L<D2となっている。なお、仕切壁34cの板厚tは、上述の間隙Cよりも十分に小さいものとなっている。
孔34a、34bのそれぞれにおける内周面34d、34eからは、突出部35、36が突出している(図8,図10参照)。
なお、孔34a、34bの開口における断面形状は、本実施形態においては半円状となっている。もともと略平板状であった上記金属部材を両側から半円状に曲げて変形させることで嵌合部33および仕切壁34cを形成しており、この際に上記半円状の断面形状が得られる。もちろん、この断面形状は半円状に限られず、それぞれ突出片23、24の先端23d、24dの形状と相似形状となるよう上記金属部材を変形させてもよい。これにより、挿入孔部34と突出片23、24との接触面積を確保しながら、突出片23、24を挿入孔部34に挿入することができる。
図8に示すように、第1端子21の端子本体22を電極端子10の外周面10aに沿って挿通させ、一方で、突出片23、24の先端23d、24dに第2端子31の挿入孔部34の開口を対向させる。
この位置からさらに第2端子31を端子本体22側に相対移動させると、外側部間寸法Dが挿入孔部34の開口寸法Lと等しくなるように、突出片23、24が相互に近接すると共に、端子本体22が縮径する。
さらに、第2端子31を端子本体22側に相対移動させて、端子本体22がさらに縮径すると、三つの突起22eが電極端子10の外周面10aに三点接触した後、外周面10aに押圧されて圧潰する。この圧潰により電極端子10と端子本体22との接触面積が増大して電極端子10と端子本体22間の抵抗を下げることができる。また、三つの突起22eが圧潰した状態で接触が維持されるので、接触抵抗が変化せずに安定したものとすることができる。
このように、第2端子31を端子本体22側に十分に押し込んで、突出片23、24と内周面34d、34eとの摩擦力をそれぞれ大きくして、第2端子31と第1端子21との嵌合を完了させる。この際、仕切壁34cが内側面23a、24aの双方から押圧され、比較的に強い摩擦力が得られる。
上記BMU113は、当該正確な計測値に基づき、例えば異常の単電池2を特定して上記電池システム内の上位制御装置104にその情報を送信し、これを受信した上位制御装置104は異常信号を表示部105に送信する。そして、当該異常信号を受信した表示部105は、発光または音を発する等してオペレータまたは運転者に異常である旨を通知する。また、上位制御装置104は、電池システムの負荷に供給される組電池1の電力を制限などする。すなわち、正確なパラメータを計測することができるので、電池システムの安全性をより向上させることができる。
これにより、比較的容易に、連結端子ユニット20を電極端子10に装着することができる。
また、上述した実施の形態では、三つの突起22eを設ける構成としたが、一つや二つであっても良いし、四つ以上設けてもよい。
従って、第1端子21に突出部を、第2端子31の波状部を適宜設けてもよい。
また、これら波状部と突出部がなくとも突出片23、24と内周面34d、34eとの摩擦力だけで上記縮径の状態が維持できる場合には、突出部と波状部は必ずしも設ける必要はなく、適宜割愛してもよい。
また、上述した実施の形態では、端子本体22の形状をC型円環状としたが、形状としてはC型多角形状でもよく、端子本体22の内周面において電極端子10と接触できるものであればよい。
また、容易に連結端子ユニットを電極端子に装着かつ固定して単電池のパラメータ値を正確に計測することが可能となる。
2(2A~2F)…単電池
10…電極端子
10a…外周面(外周)
19…電気計測線
20…連結端子ユニット
21…第1端子
22…端子本体
22a…外周面(外周部)
22b…内周面(内周部)
22c…一端
22d…他端
22e…突起
23,24…突出片
23b,24b…外側面(外側部)
23c,24c…基端
23d,24d…先端
23f,24f…波状部
31…第2端子
33…嵌合部
34…挿入孔部
34c…内周面(内周)
35,36…突出部
100…電池システム
D(D1,D2)…外側面間の寸法
Claims (5)
- 電極端子を有する複数の単電池を具備する組電池と、
前記電極端子に挿通されるC型の第1端子と、
前記第1端子と嵌合すると共に電気計測線に接続された第2端子と、
前記電気計測線に接続され前記組電池のパラメータを計測する計測部とを有し、
前記第1端子は、
少なくとも内周部の一部が前記電極端子に接触する端子本体と、
前記端子本体の外周部から前記端子本体の径方向外方側に向けて突出する2つの突出片とを備え、
前記第2端子は、
前記突出片が嵌合する挿入孔部を備え、
前記挿入孔部と前記突出片とが嵌合して前記第1端子が縮径することで、前記第1端子が前記電極端子に固定される電池システム。 - 前記突出片の寸法が、前記突出片の先端から基端に向かうに従って漸次大きくなるよう形成され、
前記第2端子の前記挿入孔部の開口寸法は、前記突出片の先端の寸法より大きく、前記突出片の基端における寸法よりも小さい請求項1に記載の電池システム。 - 前記第1端子は、前記突出片の外周面の少なくとも一部に波状に形成された波状部を備え、
前記第2端子は、前記挿入孔部の内周面から突出し、前記波状部と係合する突出部を有する請求項2に記載の電池システム。 - 前記第1端子は、その本体の内周部に互いに間隔を空けて設けられると共に、それぞれ前記電極端子の外周面に接触する少なくとも3つの突起を有する請求項3に記載の電池システム。
- 前記計測部の計測した前記パラメータに基づくデータを表示する表示部をさらに有する請求項4に記載の電池システム。
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CN2011900001112U CN202797135U (zh) | 2010-03-29 | 2011-03-25 | 电池系统 |
EP11762691A EP2453503A1 (en) | 2010-03-29 | 2011-03-25 | Battery system |
US13/386,078 US20120237807A1 (en) | 2010-03-29 | 2011-03-25 | Battery system |
KR1020127001888A KR101258378B1 (ko) | 2010-03-29 | 2011-03-25 | 전지 시스템 |
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JP2010074908A JP4995298B2 (ja) | 2010-03-29 | 2010-03-29 | 電池システム |
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US (1) | US20120237807A1 (ja) |
EP (1) | EP2453503A1 (ja) |
JP (1) | JP4995298B2 (ja) |
KR (1) | KR101258378B1 (ja) |
CN (1) | CN202797135U (ja) |
WO (1) | WO2011122460A1 (ja) |
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US9340105B2 (en) | 2011-09-27 | 2016-05-17 | Toyoda Gosei Co., Ltd. | Fuel tank opening-closing device |
JP2013195145A (ja) * | 2012-03-16 | 2013-09-30 | Furukawa Battery Co Ltd:The | 内部抵抗計測用端子 |
JP6345101B2 (ja) * | 2014-12-17 | 2018-06-20 | 日立オートモティブシステムズ株式会社 | 蓄電モジュール |
FR3040495B1 (fr) * | 2015-08-25 | 2017-08-11 | Renault Sas | Batterie assurant une determination de la tension electrique aux bornes des elements de connexion electrique entre les elements de stockage |
CN106384898A (zh) * | 2016-11-07 | 2017-02-08 | 惠州市亿能电子有限公司 | 一种电压采集端子组件 |
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EP2453503A1 (en) | 2012-05-16 |
JP4995298B2 (ja) | 2012-08-08 |
JP2011210424A (ja) | 2011-10-20 |
KR20120040210A (ko) | 2012-04-26 |
CN202797135U (zh) | 2013-03-13 |
US20120237807A1 (en) | 2012-09-20 |
KR101258378B1 (ko) | 2013-04-30 |
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