WO2012063733A1 - 電池モジュール - Google Patents
電池モジュール Download PDFInfo
- Publication number
- WO2012063733A1 WO2012063733A1 PCT/JP2011/075426 JP2011075426W WO2012063733A1 WO 2012063733 A1 WO2012063733 A1 WO 2012063733A1 JP 2011075426 W JP2011075426 W JP 2011075426W WO 2012063733 A1 WO2012063733 A1 WO 2012063733A1
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- WO
- WIPO (PCT)
- Prior art keywords
- adherend
- battery
- electrode terminal
- battery module
- battery cell
- Prior art date
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Classifications
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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
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
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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
- H01M50/572—Means for preventing undesired use or discharge
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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
-
- 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
- H01M50/202—Casings or frames around the primary casing of a single cell or a single battery
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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
-
- 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
- H01M50/571—Methods or arrangements for affording protection against corrosion; Selection of materials therefor
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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
- H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
- H01M50/609—Arrangements or processes for filling with liquid, e.g. electrolytes
- H01M50/627—Filling ports
- H01M50/636—Closing or sealing filling ports, e.g. using lids
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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 module.
- This application claims priority on Japanese Patent Application No. 2010-251125 filed in Japan on November 9, 2010, the contents of which are incorporated herein by reference.
- Battery cells are used in various electric systems such as electric vehicles, stationary power supply devices, and power generation devices.
- a battery cell is equipped with the battery container which stores electrolyte solution, the electrode terminal attached to the battery container, and the electrode plate accommodated in the battery container and connected to the electrode terminal.
- the battery container may be formed of a metal material such as aluminum.
- a portion of the battery container that comes into contact with the electrolytic solution may take ions in the electrolytic solution and alloy them, and the battery container and the electrolytic solution may deteriorate.
- Patent Document 1 a battery cell in which a battery container is electrically connected to an electrode terminal via a resistance element as a current limiting means is proposed. ing. According to this conventional technique, the potential of the battery container is held at the potential of the electrode terminal connected to the battery container, and ions in the electrolytic solution are less likely to be taken into the battery container.
- the current limiting means which is a small component arranged between the electrode terminal and the battery container, electrically connects the electrode terminal and the battery container. One end is fixed to the electrode terminal and the other end is fixed to the battery container with screws or the like. In this way, it is troublesome to fix the current limiting means which is a small component in the first place, and there is a possibility that the manufacturing efficiency is lowered.
- the battery module of the present invention includes a conductive battery container, a battery cell including an electrode terminal exposed to the outside of the battery container, an electrode plate, a first conduction part, a second conduction part, and the first An adherend including a resistor interposed between the first conductive portion and the second conductive portion and electrically connected to the first conductive portion and the second conductive portion; The adherend is attached to the battery cell, and the first conductive portion is automatically connected to the battery container and the second conductive portion is electrically connected to the electrode terminal during the attachment. Connected.
- the battery cell electrode terminal (positive electrode terminal or negative electrode terminal) and the conductive battery container are automatically connected via the resistor by pressing and fixing the adherend on the battery cell. Electrically connected.
- FIG. 2 is a diagram showing a cross-sectional structure taken along line A-A ′ of the battery module of FIG. 1.
- FIG. 2 is a diagram showing a cross-sectional structure taken along line BB ′ of the battery module of FIG. 1, wherein (a) is a cross-sectional structure when the adherend is mounted on a battery cell, and (b) is a cross-sectional structure when the adherend is attached to a battery cell.
- (a) is a cross-sectional structure when the adherend is mounted on a battery cell
- It is a figure which shows the cross-sectional structure just before mounting
- It is a figure which shows the modification (modification 1) of the battery module shown in FIG.
- FIG. 1 is a schematic diagram showing the configuration of the battery module of the present embodiment
- FIG. 2 is a cross-sectional structural view taken along the line AA ′ of FIG. 1
- FIGS. 3A and 3B are BB ′ of FIG. It is sectional structure drawing in a line.
- coordinate systems are shown in the drawings shown below, they are all the same orthogonal coordinate system.
- the battery module 100 of the present embodiment is configured by combining the battery cell 1 and the adherend 2.
- the battery cell 1 is, for example, a lithium ion secondary battery, and a stacked battery cell is shown here.
- One electrode of the battery cell 1 can be touched with one touch by covering and pressing the adherend 2 on the battery cell 1 and fixing the adherend 2 to the battery cell 1 (hereinafter referred to as “attachment”).
- the terminal (positive electrode terminal or negative electrode terminal) and the metal battery container are automatically electrically connected via the resistor 83. Details will be described below.
- the stacked battery cell 1 includes a plurality of sheet-like positive electrode plates 3 and a plurality of sheet-like negative electrode plates 4 each including a separator 5 (here, the negative electrode plate 4 is included).
- the laminated electrode body 6 is sequentially laminated via a bag-like separator, and then the laminated electrode body 6 is not rolled up, but in a conductive battery container 7 (for example, a metal battery container such as aluminum). It is a housed configuration.
- the members constituting the battery container 7 are a container body 7a having an opening and a lid 7b that closes the opening.
- the opening is closed by the lid 7b.
- the battery case 7 is hermetically sealed by welding or the like (not shown, but an insulating resin sheet or the like is disposed between the laminated electrode body 6 and the battery case 7).
- the long side of the bottom surface of the substantially rectangular container body 7a is in the X-axis direction
- the short side of the bottom surface is in the Y-axis direction
- the height direction of the container body 7a is in the Z direction.
- a battery container 7 is disposed on the side.
- the electrode terminal (positive electrode terminal 8 or negative electrode terminal 9) is disposed such that each of both ends of the electrode terminal exits from both sides of the lid 7b through a through-hole provided in the lid 7b.
- the lid 7b are integrally fixed to the lid 7b by insulating resin (insulating resin 10 for positive terminal and insulating resin 11 for negative terminal) disposed between them so as not to be electrically connected.
- insulating resin insulating resin 10 for positive terminal and insulating resin 11 for negative terminal
- a liquid injection hole 7c (see FIG. 3) is formed in the lid 7b, and an electrolytic solution (not shown) is stored inside the battery container 7 therefrom.
- a metal sealing portion 17 such as a screw that closes the liquid injection hole is shown.
- the electrode terminal (positive electrode terminal 8 or negative electrode terminal 9) and the electrode plate (positive electrode plate 3 or negative electrode plate 4) are electrically connected by corresponding electrode leads (positive electrode lead 14 or negative electrode lead not shown).
- the positive electrode plate 3 is coated with a positive electrode active material 3b such as lithium manganate on both surfaces of a positive current collector 3a such as aluminum having a substantially rectangular shape, and the negative electrode plate 4 has a substantially rectangular shape.
- a negative electrode active material 4b such as carbon is coated on both surfaces of a negative electrode current collector 4a such as copper.
- the positive electrode tab 12 is a part of the positive electrode current collector 3a
- the negative electrode tab 13 is a part of the negative electrode current collector 4a.
- the positive electrode tabs 12 of the plurality of positive electrode plates 3 are bundled and fixed to one end of the strip-like positive electrode lead 14 by ultrasonic welding or the like, and the other end is fixed to the positive electrode terminal 8.
- the A through hole is formed at the other end.
- a cylindrical fastening member 15 is disposed at an end portion of the positive electrode terminal 8 that is disposed inside the battery container 7. Therefore, after inserting the fastening member 15 into the through hole of the positive electrode tab 12 and then inserting the fastening auxiliary member 16 such as a washer into the fastening member 15, the positive lead 14 is connected to the positive terminal 8 by the fastening member 15. Fixed.
- the fixing is performed by crushing one end of the rivet, and the fastening member 15 is a male screw separate from the positive electrode terminal 8. In some cases, the fixing is performed by screwing the male screw into the screw hole provided in the positive electrode terminal 8.
- connection between the negative electrode terminal 9 and the negative electrode lead is the same as the connection between the positive electrode terminal 8 and the positive electrode lead 14, the description of the connection between the negative electrode terminal 9 and the negative electrode lead is omitted.
- the electrode terminal and the electrode plate are electrically connected using the electrode lead, but a plurality of electrode tabs are formed in the same manner as described above by forming holes similar to the through holes in the electrode tab. May be directly fixed to the corresponding electrode terminal. The characteristic shape of the electrode terminal and its effect will be described later.
- the adherend 2 is connected to the substantially rectangular and plate-shaped adherend top plate portion 2b in which the plane is arranged on the XY plane, and the entire periphery of the adherend top plate portion 2b, and is covered from the entire periphery.
- An adherend side surface portion 2a having a shape extending substantially perpendicular to the plane of the adherend top plate portion 2b (-Z direction), and a resistance portion 80 embedded and fixed in the adherend top plate portion 2b. . That is, the resistance portion 80 is integrated with the adherend 2.
- the adherend side surface portion 2a and the adherend top plate portion 2b are formed of an elastic material that can be elastically deformed, such as silicon rubber or plastic resin.
- the adherend side surface portion 2a and the adherend top plate portion 2b may be integrally formed by molding or the like.
- Through holes (positive electrode terminal through hole 2d and negative electrode terminal through hole 2e) through which the positive electrode terminal 8 and the negative electrode terminal 9 are inserted are respectively formed in the adherend top plate portion 2b.
- the resistance unit 80 includes a first metal conduction part 81 that physically contacts the sealing part 17, a second metal conduction part 82 that physically contacts the positive electrode terminal 8, and a first conduction part 81. There is provided a resistor 83 that is interposed between the second conducting portions 82 and has a high resistance value in the electrical path between the first conducting portion 81 and the second conducting portion 82.
- the resistor 83 may be physically connected directly to the first conduction part 81 and the second conduction part 82, or to the first conduction part 81 and the second conduction part 82 via the wiring 84. They may be connected (see FIG. 3). In FIG. 1, the resistance portion 80 is shown separated from the adherend top plate portion 2b, but this is for ease of understanding.
- the resistance portion 80 is attached to the adherend top plate portion 2b. Embedded and fixed. However, if the resistance portion 80 is firmly fixed to the adherend top plate portion 2b or the adherend side surface portion 2a, the fixing may be performed using an insulating adhesive or the like without being embedded. .
- the concave portion 2c which is a space portion surrounded by the adherend side surface portion 2a, has a cross-sectional shape substantially the same as the cross-sectional shape of the battery cell 1 in the XY plane, or the cross-sectional shape of the battery cell 1 in the XY plane. It is a slightly smaller similar shape. For this reason, the adherend 2 is securely covered on the battery cell 1, that is, until the electric path is formed between the positive electrode terminal 8 and the battery container 7 through the resistance portion 80 of the adherend 2.
- the adherend side surface portion 2a made of the elastic material is elastically deformed along the shape of the container body 7a of the battery cell 1, and the repulsion thereof.
- the adherend 2 can be fixed to the battery cell 1 by pressing the battery cell 1 with force.
- the adherend side surface portion 2 a is formed of the elastic material, there is an effect that the adherend 2 is not easily detached from the battery cell 1 due to the frictional force between the elastic material and the battery container 7.
- the surface of the portion of the container main body 7a that contacts the adherend side surface 2a may be roughened by, for example, sandblasting (the portion where the frictional force is enhanced is referred to as the frictional portion 18).
- the friction part 18 may be formed in the site
- FIG. 3A shows a state where the adherend 2 is covered with the battery cell 1 to form a battery module
- FIG. 3B shows a state immediately before the adherend 2 is covered with the battery cell 1. Indicates the state.
- the first conduction portion 81 of the resistance portion 80 is a metal having a convex shape (here, for example, a triangular pyramid), and the apex thereof is arranged toward the upper surface of the sealing portion 17 fixed to the battery cell 1. ing.
- a recess corresponding to the convex shape is formed on the upper surface of the sealing portion 17.
- the sealing portion 17 is a male screw
- the recess may be formed at the head of the screw.
- the first conductive portion 81 is convex, for example, a triangular pyramid shape, and the concave shape corresponding to the sealing portion 17 is formed.
- the first conductive portion 81 is concave and corresponds to the sealing portion 17.
- a convex shape may be formed.
- the convex or concave shape formed on the sealing portion 17 is referred to as a fitting portion 19.
- the second conducting portion 82 of the resistance portion 80 is a metal plate-like member having a through hole having a similar or slightly larger cross-sectional shape in the XY plane of the shaft portion 8a of the positive electrode terminal 8. It is.
- the shape of the electrode terminal is characteristic in this embodiment. This will be described below.
- the positive electrode terminal 8 includes a cylindrical shaft portion 8a. And when connected to the shaft portion 8a and viewed in the XY plane, the similar shape (here, a circle having a diameter larger than that of the previous circle) is larger than the cross-sectional shape of the shaft portion 8a (here, a circle).
- a first connecting portion 8b which is a plate-like member. The first connection portion 8b is designed to have a predetermined thickness (for example, about 3 mm) so as to have a certain strength.
- electrical_connection part 82 can contact both the axial part 8a and the 1st connection part 8b of the positive electrode terminal 8 compared with the case where the positive electrode terminal 8 consists only of the axial part 8a,
- the electrical connection with the second conduction portion 82 becomes better.
- the second conducting portion 82 can make surface contact with the first connecting portion 8b, the electrical connection is improved. That is, the resistance value such as the contact resistance can be reduced in the electric path existing between the positive electrode terminal 8 and the positive electrode plate 3.
- the area of the portion of the second conductive portion 82 that contacts the shaft portion 8a is increased so that the second conductive portion 82 can be in surface contact with the shaft portion 8a.
- the thickness of the periphery of the through hole of the plate-like second conducting portion 82 is increased (the portion is referred to as a plate thickness increasing portion 82a). With such a configuration, the electrical connection is further improved.
- the second connection portion 8c having the same structure as the first connection portion 8b is spaced apart from the first connection portion 8b by a fixed distance (interval larger than the thickness of the lid 7b). You may form in the part 8a.
- the contact area between the positive electrode lead 14 and the positive electrode terminal 8 can be increased, and thus the contact resistance between the positive electrode plate 3 and the positive electrode terminal 8 is reduced. be able to. Accordingly, it is possible to provide the battery module 100 with better battery performance.
- the shaft portion 8a, the first connection portion 8b, and the second connection portion 8c may be the same member, or may be integrally formed using the same member using a mold.
- the adherend 2 can be firmly covered with the battery cell 1 by the friction portion 18, but the modification shown in FIG. 4 is used instead of the friction portion 18.
- Such a convex part 20 and a concave part 21 may be fitted together to fix the adherend 2 to the battery cell 1 to form the battery module 100.
- FIG. 4 uses a container main body 7a ′ in which a convex portion 20 is formed on the container main body 7a of FIG. 1, and a concave portion having a shape corresponding to the convex portion 20 on the inner surface of the adherend side surface portion 2a of FIG. Except for the use of the adherend side surface portion 2a ′ in which 21 is formed, the configuration is the same as that of FIG.
- the convex portion 20 has a wedge-shaped cross-sectional shape in the YZ plane, and further, when the battery module 100 is formed, the convex portion 20 faces in the direction in which the adherend 2 is inserted ( ⁇ Z direction). Since the width of the cross section of the container main body 7a ′ in the YZ plane increases in the Y-axis direction, once the convex portion 20 and the concave portion 21 are fitted together, it is stronger than the friction portion 18. The battery cell 1 and the adherend 2 can be fixed to each other. Therefore, since the resistance part 80 can be connected to the positive electrode terminal 8 and the battery container 7 more stably than in the case of the friction part 18, the battery module 100 with better battery performance is obtained.
- a wedge-shaped convex portion 20 is formed on the container body 7a ′, and a concave portion 21 having a shape corresponding to the convex portion 20 is formed on the adherend side surface portion 2a ′.
- a wedge-shaped convex portion may be formed, and a concave portion having a shape corresponding to the convex portion may be formed in the container body 7a.
- the shape of the convex portion is the Y axis of the cross section in the YZ plane of the adherend side surface portion 2a toward the direction in which the adherend 2 is inserted ( ⁇ Z direction). It is preferable to use a wedge shape that reduces the width in the direction. From such a viewpoint, a modified example as shown in FIG. 5 may be used.
- the two first arm portions 23 are extended in the ⁇ Z direction from the adherend side surface portion 2a of the adherend side surface portion 2a of FIG.
- the adherend side surface portion toward the direction in which the adherend is inserted (the -Z direction) is provided at the tip of the first arm portion 23.
- a convex portion 20a having a wedge shape that reduces the width in the Y-axis direction of the cross section in the YZ plane is formed (the adherend 2 provided with the adherend side surface portion 2a ′′ is the first adherend). Called).
- the 2nd to-be-adhered body 22 of the same shape is prepared except the following difference with a 1st to-be-adhered body.
- the first adherend is covered from the upper surface of the battery cell 1 and the second adherend is covered from the bottom surface, and the protrusions formed on the first adherend and the second adherend, respectively.
- the part 20a and the recessed part 21a can be fitted and fixed.
- the lengths in the Z direction of the first arm portion 23 and the second arm portion 24 are designed so that the resistance portion 80 can form an electrical path between the positive electrode terminal 8 and the battery case 7 in the fixed state. Is done.
- the battery cell 1 can be firmly sandwiched between the first adherend and the second adherend. There is also an effect that it can be protected.
- the electrode terminal 8 and the sealing portion 17 of the battery cell 1 and the corresponding resistance portion 80 of the adherend 2 are provided.
- the following effects can be obtained.
- the battery module 100 when viewed as the battery module 100, the relative movement of the adherend 2 with respect to the battery cell 1 is restricted by the frictional force generated between the inner surface of the adherend side surface portion 2a and the portion of the battery container 7 in contact therewith. Has been. Accordingly, the adherend 2 is less likely to be detached from the battery cell 1, and the first conductive portion 81 and the second conductive portion 82 can be stably pressed, so that the space between the battery container 7 and the positive electrode terminal 8 can be reduced. Reliability of electrical connection can be ensured. Therefore, the battery module 100 of this embodiment can ensure excellent battery performance.
- the resistance portion 80 is embedded and fixed in the surface of the adherend 2 on the concave portion 2c side of the surface of the adherend top plate portion 2b of the adherend 2, that is, is disposed inside the adherend 2.
- the occurrence of damage due to interference with the outside of the battery module 100 is suppressed. For example, when the battery module 100 is transported, the possibility that the resistance unit 80 is damaged is reduced. Therefore, the battery module 100 of this embodiment can maintain excellent battery performance.
- the first conductive portion 81 of the resistance portion 80 has a convex shape, so that its tip is a fitting portion (recessed portion) of the sealing portion 17.
- 19 is guided to the inner surface of 19
- the positive electrode terminal 8 is guided to the through hole of the second conduction portion 82
- the resistance portion 80 is fitted to the positive electrode terminal 8 and the battery container 7. Therefore, it does not take time to align the resistance portion 80 with the positive electrode terminal 8 and the battery container 7, so that the battery module 100 can be manufactured efficiently.
- the resistor 80 is automatically connected to the positive electrode terminal 8 of the battery cell 1 and the battery container 7 (more specifically, to the battery container 7 with one touch). Therefore, it is possible to provide a battery module 100 having improved battery efficiency and excellent battery performance.
- a battery module according to the second embodiment will be described with reference to FIG.
- the difference from the first embodiment and the modification thereof is that the adherend 2 is fixed to the battery cell 1 by frictional force with the container body 7a of the battery cell 1, but the adherend 2 is downsized.
- the adherend 2A used in this embodiment is a point that is fixed to the lid 7b instead of the container body 7a of the battery cell 1. That is, the configuration of the adherend 2A is different, and the other parts are the same as those of the first embodiment and the modified example thereof, so the same numbers are assigned and the description is omitted.
- the adherend 2A has the same appearance as that of the adherend 2, but in order to show an example in which the cylindrical positive electrode terminal 8 is covered and fixed, here, the adherend side surface 2a and the adherend 2 of the adherend 2 are shown. Unlike the shape of the adherend top plate 2b, the adherend side surface of the adherend 2A has a cylindrical shape and the adherend top plate has a circular shape. That is, also in the adherend 2A, a concave portion is formed by connecting the adherend side surface portion with the entire periphery of the adherend top plate portion.
- a notch 27 serving as a hole for allowing these wires to pass outside the adherend 2A when wires such as a bus bar are connected to the positive terminal 8 is formed on the adherend side surface of the adherend 2A.
- the adherend 2A is embedded in the inner surface of the adherend top plate portion and the adherend side surface portion (here, cylindrical).
- the resistor portion 80A is fixed. That is, the resistance portion 80A is integrated with the adherend 2A.
- the resistor 80 ⁇ / b> A includes a metal first conductive portion 85 that physically contacts the lid 7 b, a metal second conductive portion 86 that physically contacts the positive electrode terminal 8, and a first There is provided a resistor 83 that is connected between the conductive portion 85 and the second conductive portion 86 and has a high resistance value in the electrical path between the first conductive portion 85 and the second conductive portion 86.
- the resistor 83 may be physically connected directly to the first conduction part 85 and the second conduction part 86, or connected to the first conduction part 85 and the second conduction part 86 via the wiring 84. It may be connected.
- the adherend 2A is fixed to the electrode terminal (here, the positive electrode terminal 8) in which the screw hole is formed, so that the diameter is substantially the same as that of the screw hole 8d of the positive electrode terminal 8.
- a large convex guide portion 26 is formed.
- the guide portion 26 has a shape that avoids the second conducting portion 86 that physically contacts the upper surface of the positive electrode terminal 8 and extends from the adherend top plate portion of the adherend 2A.
- the material of the guide portion 26 may be silicon rubber, plastic resin, or the like. Therefore, the adherend top plate portion and the guide portion 26 may be integrally molded. Together with the adherend top plate portion and the guide portion 26, the adherend side surface portion may be integrally molded at the same time.
- the adherend 2A when the adherend 2A is inserted into the positive electrode terminal 8 by the guide portion 26 and pressed and fixed, the side surface of the adherend 2A so that the first conductive portion 85 physically contacts the lid 7b.
- the first conduction part 85 is fixed to the bottom surface of the part.
- the battery module of the present embodiment can obtain the same effects as those of the battery module of the first embodiment due to the above-described configuration.
- the battery cells generally have various sizes and types, but the adherend 2A can be attached to these various battery cells as long as the screw hole 8d of the positive electrode terminal 8 is the same. Therefore, compared with the battery module of the first embodiment, the battery module of this embodiment can easily expand the application range, and the manufacturing advantages are further improved.
- the third adherend 25 having the same shape as the adherend 2 (however, the resistance portion 80 is not provided). May be attached to the battery cell 1.
- the size of the through hole for the positive electrode terminal is appropriately designed so that the adherend 2A can exhibit the above effect. If the size is substantially the same and slightly smaller than the cross-sectional shape of the adherend 2A in the XY plane, the adherend 2A has a frictional force with the third adherend 25 as well as the guide portion 26. Since it is also fixed by, etc., the outstanding battery performance can be ensured more.
- the lithium ion secondary battery has been described as an example, but the present invention is not limited to this.
- the present invention can be applied to a battery using another active material or a primary battery.
- the present invention can be applied not only to a stacked type but also to a wound type battery.
- the shape of the battery container and the electrode terminal may be appropriately changed to the shape of the adherend 2 and the like, and is not limited to a square shape or a cylindrical shape, and can be applied to any shape.
- the resistor 80 is not electrically connected between the positive electrode terminal 8 and the battery container 7, and between the negative electrode terminal 9 and the battery container 7.
- the resistor unit 80 may be electrically connected.
- the above description related to the positive electrode terminal 8 may be replaced with the negative electrode terminal 9 for understanding. That is, the present invention can also be applied when a resistor is electrically connected between the negative electrode terminal and the battery case.
- the present invention provides a battery cell having a conductive battery container, an electrode terminal exposed to the outside of the battery container, and an electrode plate, a first conduction part, a second conduction part, and the first conduction part. And an adherend including a resistor interposed between the first conducting portion and the second conducting portion, and the adherend. Is attached to the battery cell, and the first conduction part is electrically connected to the battery container and the second conduction part is electrically connected to the electrode terminal automatically during the attachment.
- the present invention relates to a battery module. ADVANTAGE OF THE INVENTION According to this invention, while improving manufacturing efficiency, the battery module provided with the outstanding battery performance can be provided.
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- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
Description
本願は、2010年11月9日に日本に出願された特願2010-251125号について優先権を主張し、その内容をここに援用する。
本発明は、かかる事情に鑑み成されたものであって、製造効率を改善するとともに、優れた電池性能を備えた電池モジュールを提供することを目的とする。
図1は、本実施形態の電池モジュールの構成を示す模式図、図2は図1のA-A’線における断面構造図、図3(a)及び(b)は図1のB-B’線における断面構造図である。なお、以下に示す図に座標系が示されている場合には、それらはいずれも同一の直交座標系である。
なお、蓋7bには注液孔7c(図3参照)が形成されており、ここから電池容器7の内部に電解液(図示せず)が貯留される。図1では、当該注液孔を塞ぐネジ等の金属製の封止部17が示されている。
封止部17の当該上面には、当該凸状の形状に対応した凹みが形成されている。例えば、封止部17を雄ネジとする場合には、ネジの頭に当該凹みを形成すればよい。ここでは第1導通部81が凸型、例えば三角錐の形状とし、封止部17にそれに対応した凹型の形状を形成したが、第1導通部81を凹型、封止部17にそれに対応した凸型の形状を形成してもよい。封止部17に形成される当該凸型又は凹型の形状を嵌合部19という。
軸部8aと第1接続部8b及び第2接続部8cは同一部材としてよく、また、同一部材により型を用いて一体形成してもよい。
図6を用いて第2の実施形態の電池モジュールにつき説明する。第1の実施形態およびその変形例と異なる点は、被着体2は電池セル1の容器本体7aとの摩擦力等で電池セル1に固定されていたが、被着体2を小型化した本実施形態で用いる被着体2Aは、電池セル1の容器本体7aではなく蓋7bに固定される点である。すなわち、被着体2Aにおける構成が異なり、他の箇所は第1の実施形態およびその変形例と同一であるので同一番号を付して説明を省略する。
2,2A…被着体(第1被着体)、
2a、2a’、2a’’…被着体側面部、
2b…被着体天板部、
2c…凹部、
2d…正極端子用貫通孔、
2e…負極端子用貫通孔、
3…正極板(電極板)、
3a…正極用集電材、
3b…正極活物質、
4…負極板(電極板)、
4a…負極用集電材、
4b…負極活物質、
5…セパレータ、
6…積層電極体、
7…電池容器、
7a,7a’…容器本体、
7b…蓋、
7c…注液孔、
8…正極端子(電極端子)、
8a…軸部、
8b…第1接続部、
8c…第2接続部、
8d…ネジ穴、
9…負極端子(電極端子)、
10…正極端子用の絶縁樹脂、
11…負極端子用の絶縁樹脂、
12…正極タブ、
13…負極タブ、
14…正極リード、
15…締結部材、
16…締結補助部材、
17…封止部、
18…摩擦部、
19…嵌合部(凹部)、
20,20a…凸部、
21,21a…凹部、
22…第2被着体、
23…第1腕部、
24…第2腕部、
25…第3被着体、
26…ガイド部、
27…切欠部、
80、80A…抵抗部、
81、81a…第1導通部、
82…第2導通部、
82a…板厚増加部、
83…抵抗体、
84…配線、
85…第1導通部、
86…第2導通部、
100…電池モジュール
Claims (7)
- 導電性の電池容器と、前記電池容器の外部に露出した電極端子と、電極板とを備えた電池セルと、
第1導通部と、第2導通部と、前記第1導通部と前記第2導通部との間に介在し且つ前記第1導通部と前記第2導通部とに電気的に接続された抵抗体とを備えた被着体とを有し、
前記被着体は前記電池セルに被着され、前記被着の際に自動的に前記第1導通部は前記電池容器に電気的に接続し且つ前記第2導通部は前記電極端子に電気的に接続される電池モジュール。 - 前記被着体は、平板状の被着体天板部と、前記被着体天板部の全周囲と接続し且つ前記被着体天板部とで凹部を形作る被着体側面部とを備え、
前記抵抗体は前記凹部の内側に配置されている請求項1に記載の電池モジュール。 - 前記凹部の断面形状は、前記電池容器の断面形状と実質的に同一であり、前記被着体側面部が弾性変形することで前記被着体が前記電池容器に前記被着される請求項2に記載の電池モジュール。
- 前記被着体と実質的に同一形状の第2被着体とをさらに有し、
前記電池セルを前記被着体と前記第2被着体とで挟みこみ且つ前記被着体と前記第2被着体とを嵌め合わせて前記被着がなされる請求項3に記載の電池モジュール。 - 前記被着体は、前記凹部に前記被着体天板部から延びるガイド部をさらに備え、
前記電極端子には前記露出した箇所に穴が形成されており、
前記ガイド部が前記穴に挿入されることで前記被着体が前記電池セルに固定されて前記被着がなされる請求項2に記載の電池モジュール。 - 前記電極端子は、軸部と、前記軸部の断面方向に伸び且つ前記軸部と一体形成された接続部とを備え、
前記接続部にも前記電極板からの電気的経路を持つことで、前記電極端子と前記電極板との間の電気経路の抵抗値を低減させる請求項1乃至請求項5のいずれか一項に記載の電池モジュール。 - 前記電極端子は、正極端子である請求項6に記載の電池モジュール。
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KR1020127026300A KR101298881B1 (ko) | 2010-11-09 | 2011-11-04 | 전극 단자와 전지 용기가 피착체를 개재하여 접속된 전지 모듈 |
CN2011900004178U CN202917549U (zh) | 2010-11-09 | 2011-11-04 | 电池模块 |
US13/817,753 US20140147721A1 (en) | 2010-11-09 | 2011-11-04 | Battery module |
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JP2010251125A JP4939643B1 (ja) | 2010-11-09 | 2010-11-09 | 電池モジュール |
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JP (1) | JP4939643B1 (ja) |
KR (1) | KR101298881B1 (ja) |
CN (1) | CN202917549U (ja) |
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JP5364751B2 (ja) * | 2011-03-30 | 2013-12-11 | 三菱重工業株式会社 | 電池セル |
US9023517B2 (en) * | 2012-03-21 | 2015-05-05 | Samsung Sdi Co., Ltd. | Secondary battery |
KR101944957B1 (ko) * | 2015-07-20 | 2019-02-01 | 주식회사 엘지화학 | 배터리 팩 및 이를 포함하는 자동차 |
EP3133667A1 (de) * | 2015-08-18 | 2017-02-22 | Lithium Energy and Power GmbH & Co. KG | Verfahren zum herstellen einer batteriezelle und batteriezelle |
JP6333788B2 (ja) * | 2015-10-06 | 2018-05-30 | 太陽誘電株式会社 | 電池ケース |
DE102016225173A1 (de) * | 2016-12-15 | 2018-06-21 | Robert Bosch Gmbh | Verfahren und System zur Herstellung einer Batteriezelle |
KR20220043543A (ko) * | 2020-09-29 | 2022-04-05 | 에스케이온 주식회사 | 단자대 보호 커버 및 이를 포함하는 배터리모듈 |
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JP2004200024A (ja) * | 2002-12-19 | 2004-07-15 | Japan Storage Battery Co Ltd | 組電池 |
JP2008186591A (ja) * | 2007-01-26 | 2008-08-14 | Mitsubishi Heavy Ind Ltd | リチウム二次電池及び組電池 |
JP2010033777A (ja) * | 2008-07-25 | 2010-02-12 | Mitsubishi Heavy Ind Ltd | 電池パック容器、電池パック及びリチウム二次電池 |
JP2011134552A (ja) * | 2009-12-24 | 2011-07-07 | Mitsubishi Heavy Ind Ltd | 電池モジュールおよび組電池 |
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JP2004200024A (ja) * | 2002-12-19 | 2004-07-15 | Japan Storage Battery Co Ltd | 組電池 |
JP2008186591A (ja) * | 2007-01-26 | 2008-08-14 | Mitsubishi Heavy Ind Ltd | リチウム二次電池及び組電池 |
JP2010033777A (ja) * | 2008-07-25 | 2010-02-12 | Mitsubishi Heavy Ind Ltd | 電池パック容器、電池パック及びリチウム二次電池 |
JP2011134552A (ja) * | 2009-12-24 | 2011-07-07 | Mitsubishi Heavy Ind Ltd | 電池モジュールおよび組電池 |
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CN202917549U (zh) | 2013-05-01 |
US20140147721A1 (en) | 2014-05-29 |
JP4939643B1 (ja) | 2012-05-30 |
KR20120121927A (ko) | 2012-11-06 |
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