Classifications

• • 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
  • H01M10/04—Construction or manufacture in general
  • H01M10/0436—Small-sized flat cells or batteries for portable equipment
• • 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
• • 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
  • H01M50/147—Lids or covers
  • H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
  • H01M50/169—Lids or covers characterised by the methods of assembling casings with lids by welding, brazing or soldering
• • 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
  • H01M10/34—Gastight accumulators
• • 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
  • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
  • H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
• • 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
• • 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
  • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
  • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
  • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

• the present invention relates to a battery suitable for use as a power source of a small electronic device such as a portable electronic device, and particularly to a structure of a thin battery.
• cylindrical batteries and square batteries are used as power sources for electronic devices.
• metal cans that have been deep drawn are used.
• metal cans that have been deep drawn square cylinder drawn have been used.
• a metal can deep-drawing can that has been deep-drawn before and a metal lid is fitted into the opening and welded (see, for example, Japanese Patent Application Laid-Open No. H11-188580). (See the conventional square nonaqueous electrolyte secondary battery described in the official gazette.)
• a laminate made by laminating a metal foil such as aluminum foil and a resin to reduce the overall thickness as an exterior material.
• a shallow drawn metal can such as a lunch box is used, and a metal lid is fitted into the opening and welded. No. 20 non-aqueous electrolyte secondary battery).
• the conventional thin battery structure as described in (1) to (3) above cannot sufficiently meet the demand for further thinning, or even if the thinning is possible, the strength is not sufficient.
• problems such as failures during production and difficulty in setting in equipment. That is, in the battery described in (1), since a deep-drawn can was used as the battery can, there was naturally a certain limit in the size that could be formed. For example, the thinnest cans currently have a can thickness of about 3 bandages, and it is impossible or extremely difficult to obtain thinner cans less than this with the current deep drawing technology.
• the metal lid that seals the opening of the can has terminals attached to the mounting holes provided in the metal lid through insulating packing (gasket) made of resin.
• insulating packing gasket
• this insulating packing will come closer to the opening edge, so when the metal lid is fitted into the opening and joined by laser welding, etc. The welding heat makes the insulating packing easier to melt.
• a lid of the same size is set on the periphery of the maximum opening of the can and the vicinity of the periphery of the maximum opening is welded, so that welding heat is applied to the electrode body (electrode element) inside the can. ) And components located near the welds, which can have a thermal effect.
• the battery type is thin, it has a simple rectangular parallelepiped shape.Therefore, when installing the protection circuit required for the secondary battery, a space for mounting the space must be secured or provided separately. There is a need to.
• the present invention is to provide a battery having a novel structure that can solve problems that can occur in all aspects such as the above-described shape, mounting properties, strength, and productivity in a single step in thinning the battery. It is.
• the invention according to claim 1 of the present application is directed to a battery having a battery can including: a can body having a recess for accommodating an electrode body; and a metal lid for sealing an open end of the recess of the can body.
• a battery can including: a can body having a recess for accommodating an electrode body; and a metal lid for sealing an open end of the recess of the can body.
• the can body that constitutes the battery can has a plate-like structure formed by shallow drawing a metal plate, and the periphery of the open end of the can body is joined and integrated with a metal lid. This provides a flange that can keep the inside of the recess of the can body airtight and liquid tight.
• An electrode body in which a positive electrode and a negative electrode are laminated via a separator and an electrolyte are accommodated in the concave portion of the can body, and in this state, a metal lid is joined to a flange portion of the can body to be integrated and integrated. Seal the open end of the recess.
• Examples of the material forming the can body and the metal lid include an iron plate, a nickel plate, an aluminum plate, and an alloy plate of these metals (that is, an iron alloy plate, a nickel alloy plate, an aluminum alloy plate, and an iron-nickel alloy).
• Sheet, iron-aluminum alloy sheet, nickel-aluminum alloy sheet), magnesium alloy sheet, stainless steel sheet, rolled steel sheet with nickel plating, nickel plating A stainless steel plate or the like can be used (claim 3).
• These metal plates may be used alone or in combination.
• a rolled steel plate or a stainless steel plate with nickel plating is preferably used.
• a clad material laminate material
• a nickel clad material obtained by laminating nickel can be used.
• the metal lid and one surface (bottom surface) of the can body facing the metal cover are each formed with a convex shape toward the inside of the battery. It is desirable that the center portion be formed so as to have a deformation amount of 0.05 to 0.3 mm in the protruding direction (claim 4). If the amount of protrusion is smaller than this, the effect of preventing swelling of the battery can is poor.If it is too large, not only will the electrode body be pressed unnecessarily, but also the volume inside the can will decrease. It is not preferable. In order to surely suppress or prevent swelling, it is preferable to form a range corresponding to the area of the electrode body disposed inside in a convex shape.
• a notch formed by pressing is provided in a part of the can body or a part of the metal lid facing this, and this part is released to the outside when the internal pressure of the battery rises above a predetermined pressure. (Claim 5).
• a part of the flange of the can body is made to be a wide flange, and its width is set to another flange. It is desirable to make the width wider than the width of the flange portion (claim 6). In other words, it is desirable that a flange is formed around the battery can, and the flange width of one part is wider than that of the other part. In this case, how much the width of the wide flange portion is made wider than the width of the other flange portions is determined in consideration of the size of the entire battery, the size of the protection circuit, and the like. Normally, the width is set between l mm and 6 mm.
• the output terminal of the positive electrode and / or the negative electrode can be provided in the wide flange portion. (Claim 7). Further, of the peripheral surface portion in the thickness direction of the can main body (the portion forming the side surface of the concave portion), the peripheral surface portion on the side where the wide flange portion is located is provided with one of the output terminals of the positive electrode and the negative electrode. A take-out part can be provided (Claim 8), and the other output terminal can be provided on the wide flange portion.
• the protection circuit may be mounted on the wide flange portion. Ten ) .
• the protection circuit mounting structure may be specifically configured as follows (claim 11 or claim 12 or claim 13).
• a plurality of elastic pieces each having an engagement claw at the tip are assembled with a protection circuit on a substrate provided at a predetermined position on the outer periphery to make a module.
• a U-shaped rising portion which is formed by bending in the thickness direction of the battery can and has an engagement hole at a predetermined position is provided.
• the elastic piece of the protection circuit module is engaged with the engagement hole in the rising portion.
• the protection circuit module is fixed to the wide flange portion by engaging the dowels (claim 11).
• a protective circuit is assembled to a resin molded body in which a pair of elastic pieces having claws at the tip are provided on both sides and a groove is formed on the inner surface of the both sides so that a wide flange portion can be slidably fitted. I do.
• notches are provided at predetermined positions on both sides of the wide flange portion. Then, when the both sides of the wide flange portion are fitted into the grooves of the protection circuit module and slid to a predetermined position, the claws of the protection circuit module engage with the notches in the wide flange portion. (Claim 12).
• the can body is a dish-shaped shallow drawn can, and the periphery of the open end thereof is joined to and integrated with a metal lid, so that the inside of the recess of the can body is airtight and liquid-tight.
• the flange portion can be used as a means for facilitating the attachment / detachment work to the device. For example, if a guide portion corresponding to a flange portion of a battery can is formed in a portion of a device where a battery is to be mounted, a detachment operation to the device can be performed simply by inserting the flange portion into the guide portion and sliding the guide portion. Will be able to do it. Therefore, it is possible to realize a battery that has excellent mountability to equipment and that can be easily separated from the equipment when disposed after use.
• the metal lid and the can main body are joined at the flange provided at the periphery of the opening end of the can main body, the metal lid can be easily bonded (for example, heat bonded) to this portion via a resin.
• a resin instead of bonding using resin, —Even when performing the first welding, the other parts materials are relatively isolated from the welded parts, and the various parts that make up the battery, such as insulating packing, electrodes, and separators, etc. It is possible to avoid the thermal effect on the equipment.
• a battery can having a thickness of 3 mm or less can be relatively easily produced.
• a battery with a total thickness of 3 bands or less but withstands piercing, bending, and swelling in other words, a thin battery that is excellent in piercing, bending, and swelling resistance, is compared. Can be easily obtained.
• the metal lid and one surface of the can body (the bottom surface of the concave portion) opposed to the metal lid are formed so as to be convex toward the inside of the battery, and the amount of deformation of the center in the protruding direction is 0.0.
• the value is set to 5 to 0.3, it is possible to suppress the expansion of the battery can in the thickness direction due to the expansion of the electrode body and the increase of the internal pressure of the battery.
• a notch formed by pressing is provided as a safety valve in a part of the can body or a part of the metal lid facing the can, the cut will break when the battery internal pressure rises above a predetermined pressure. Thus, the internal pressure of the battery is released to the outside from this portion.
• a part of the flange part of the can body is a wide flange part wider than other flange parts, in other words, if a part of the flange part provided around the battery can is a wide flange part, A protection circuit can be attached to this wide flange. Therefore, when a protection circuit is provided, there is no need to secure a separate space and base. You. In that case, if the configuration described in claim 7, claim 8, or claim 9 is adopted, the output terminal and the protection circuit can be electrically connected in the shortest distance, so that the wiring between them is simplified. can do.
• the protection circuit module is fitted into the rising portion provided on the wide flange portion, and the engaging claw provided on the elastic piece of the protection circuit module is engaged with the engaging hole in the rising portion.
• the protection circuit can be easily fixed to the wide flange portion only by engaging with the flange.
• both sides of the wide flange portion are inserted into the grooves provided on the inner surfaces of both sides of the protection circuit module and slid, and provided on both sides of the protection circuit module.
• the protection circuit can be easily fixed to the wide flange portion only by engaging the claws of the elastic piece with the notches on both sides of the wide flange portion.
• the protection circuit is modularized, and in the configuration described in claim 13, the protection circuit attached to the wide flange portion is made of metal. In any case, the protection circuit is not exposed to the outside by being covered with a case made of metal. Therefore, it is possible to prevent the protection circuit from being accidentally damaged or dust from being attached to the protection circuit.
• FIG. 1 is an external perspective view showing a battery of the present invention.
• FIG. 2 is a plan view of the battery.
• FIG. 3 is a cross-sectional view taken along the line III-III in FIG.
• FIG. 4 is a cross-sectional view taken along the line IV-IV of FIG. 2 and a partially enlarged view thereof.
• Figure 5 shows an example of a state in which a protection circuit is provided on the battery flange.
• FIG. 6 is an enlarged sectional view taken along the line VI-VI of FIG.
• FIG. 7 is a perspective view of the periphery of the wide flange portion (first flange portion) of the battery showing another example in which a circuit is mounted.
• FIG. 8 is a perspective view of the periphery of the wide flange portion of the battery showing a further example in which a protection circuit is attached to the flange portion.
• FIG. 9 shows an example in which the protection circuit is modularized and can be attached to the wide flange portion of the battery, and is a perspective view showing the structure around the flange portion and the protection circuit module.
• FIG. 10 is a cross-sectional view showing a state where the protection circuit module is attached to the wide flange portion of the battery shown in FIG.
• Fig. 11 shows another example in which the protection circuit is modularized and can be attached to the wide flange portion of the battery.It is a perspective view showing the structure around the wide flange portion and the protection circuit module. .
• FIG. 12 is a cross-sectional view showing a state where the protection circuit module is attached to the wide flange portion of the battery shown in FIG.
• FIG. 13 is a perspective view of the periphery of the wide flange portion showing an example in which a protection circuit is attached to the wide flange portion of the battery and a metal (aluminum) case is placed over the protection circuit.
• FIG. 14 is a cross-sectional view showing a state where the protection circuit module shown in FIG. 13 is covered with a metal case and welded to the wide flange portion.
• FIG. 15 is a perspective view showing an example in which a battery provided with a protection circuit module is inserted between a pair of contacts provided on an external device so that both are electrically connected.
• BEST MODE FOR CARRYING OUT THE INVENTION 1 to 6 show examples in which the present invention is applied to a prismatic lithium ion secondary battery (hereinafter simply referred to as a battery).
• the battery 1 has a rectangular battery can 2 in plan view (the state of FIG. 2) with rounded corners.
• the battery can 2 includes a can body 3 having a recess 31 and a metal lid 4 for sealing the open end of the recess 31 of the can body 3.
• the can body 3 is formed in a dish shape by shallow drawing a single metal plate (sheet metal), and a flat flange portion 32 is formed around the entire periphery of the open end thereof. Is formed.
• the flange portion 32 has a flange portion (first flange portion) 32a at the first short side portion 3a located on the upper end side of the can body 3 in the state shown in FIG. 1 is the flange portion (second flange portion) at the second short side 3b located at the lower end side of the can body and the long sides 3c located at both sides 3c.
• 3 2b width (flange width) L2 It is said that it is wider than one band.
• the electrode body 5 and an electrolytic solution are provided in the recess 31 of the can body 3, that is, in the battery can 2. It contains a non-aqueous electrolyte solution obtained by dissolving an electrolyte such as Li BF 4 in an aqueous solvent.
• Electrode body 5 for example, a positive electrode sheet for the L i C 0 0 2 as an active material, for example a sheet-like negative electrode active material the graphite, after spirally wound in between the separators,
• a positive electrode sheet for the L i C 0 0 2 as an active material for example a sheet-like negative electrode active material the graphite, after spirally wound in between the separators
• a conductive tab (only the conductive tab 6 on the negative electrode side is shown in the illustrated example) is led out from the sheet-like positive electrode and negative electrode constituting the electrode body 5. ing.
• a conductive tab on the positive electrode side (not shown) is connected to a predetermined position on the inner surface of the can body 3, and a conductive tab 6 on the negative electrode side is connected to a negative electrode terminal 7, which will be described later.
• the device has a take-out portion for a negative output terminal (hereinafter, referred to as a negative terminal) 7 and a positive output terminal (hereinafter, referred to as a positive terminal) 8.
• the positive electrode terminal 8 is a single oval or rectangular metal plate attached to the outer surface of the upper wall 31a because the battery can 2 is on the positive electrode side in the battery 1 in the illustrated example. It is composed of Also, as shown in FIG.
• a part for taking out the negative electrode terminal 7 is a mounting hole 31b that penetrates the upper wall 3la and is disposed outside the upper wall 31a.
• the mounting holes 31b are hermetically and liquid-tightly sealed.
• the negative electrode terminal 7 has one end face exposed to the outside of the can body 3 and the other end face disposed in the recess 31, and a conductive tab 6 led from the sheet-shaped negative electrode is connected to this end face. ing.
• the peripheral surface 31c including the upper wall portion 31a of the can body 3 forming the side surface of the concave portion 31 is perpendicular to the flange portion 32 and the bottom surface 31d of the concave portion 31.
• a predetermined obtuse angle (10 to 30 degrees) is formed with respect to the flange 31 and the bottom 31 d of the recess 31. It is also possible to adopt a configuration in which it is inclined. By doing so, the gap C generated between the inner surface of the can and the electrode body 5 at the corner in the battery can 2 is somewhat small. As a result, the space that can be used as a reservoir for the electrolytic solution is increased by that amount, and as a result, the amount of the electrolytic solution injected into the battery can 2 can be increased.
• the metal lid 4 is formed of a single metal plate made of a stamped product, and the shape and size of the periphery are the same as the shape and size of the outer periphery of the flange portion 32 in the can body 3. ing. As shown in FIGS. 3 and 4, the metal cover 4 is joined and integrated with the flange portion 32 of the can body 3, and the unified metal cover 4 opens the concave portion 31 of the can body 3. By sealing the mouth end, the inside of the concave portion 31 (the inside of the battery can 2) is kept air-tight and liquid-tight.
• the metal lid 4 and the flange portion 32 of the can body 3 can be joined and integrated by laser welding or by thermal bonding using a resin.
• the metal lid 4 is fitted to the flange portion 32, and the two are joined and integrated by laser welding the vicinity of these peripheral edges or the outer peripheral portion P of the mating surface over the entire circumference.
• a resin as a bonding agent is applied to the surface of the flange portion 32 or the peripheral portion 4a of the metal cover 4 to be fitted thereto, and the resin is temporarily melted by heat and thermally bonded. Thereby, both are joined and integrated.
• the metal cover 4 has a notch 4b serving as a safety valve so as to be positioned in the can body 3 at a space S formed at one end side of the electrode body 5.
• Can be formed at the time of press molding.
• This notch (safety valve) 4b is opened when the internal pressure of the battery rises above a predetermined pressure, releasing the internal pressure of the battery to the outside.
• the metal lid 4 and one surface of the can body 3 facing the metal lid are slightly inward toward the inside of the battery. It is formed so as to be convex. And this Since the amount of deformation of the center of these convex portions in the projecting direction is set in the range of 0.05 to 0.3 band, the battery can 2 due to the expansion of the electrode body 5 and an increase in battery internal pressure is formed. Swelling in the thickness direction is suppressed.
• the total thickness L 3 of the battery 1 is 3 mm or less, the length L 3 of the long side 3 c is 65 mm or more, and the length L of the first short side 3 a (same for the second short side 3 b) L 5 can be more than 3 4 marauders.
• the overall shape of the battery in the illustrated example is square, it may be disk-shaped or round.
• the battery can 2 that is, the can body 3 and the metal lid 4, are made of, for example, an iron plate, a nickel plate, an aluminum plate, an alloy plate of these metals, a magnesium alloy plate, a stainless steel plate, a rolled steel plate subjected to nickel plating, and a nickel plating.
• a stainless steel plate or the like can be used.
• a high-strength material and light-weight aluminum alloy or magnesium alloy having a hardness of at least 70 (Hv).
• Hv hardness of at least 70
• the metal lid 4 is made of the same material as that of the can body 3 on the joint surface side with the can body 3, and the opposite surface is clad, which is a laminated material excellent in strength and lightness.
• a material for example, a nickel clad material obtained by laminating nickel can also be used.
• each of the can body 3 and the metal lid 4 can be 0.2 mm or less, and more preferably about 0.15 min. In the illustrated example, it is 0.15 mm.
• the can body 3 is formed by shallow drawing, a high-strength and hard material as described above can be used. As a result, the plate thickness is reduced as described above. That can withstand battery swelling Can be.
• the thickness of the resin layer provided between the flange portion 32 and the metal lid 4 after the heat fusion is 0.1 mm or less in order to minimize permeation of moisture from the outside. It is preferable that the thickness is about 0.03 to 0.08 mm.
• the width of the resin layer corresponding to the width direction of the flange portion 32 is set to 1 mm or more, preferably 1.5 subjects or more, and may exceed the width length of the flange portion 32.
• the flange portion 32 of the can body 3 to which the metal lid 4 is joined and integrated is attached to and detached from a device (not shown) (not shown) on which the battery 1 is mounted (for example, a portable information terminal). It can be used as a means for facilitating.
• a guide portion corresponding to the flange portion 3 2 of the battery can 2 is formed at a portion where the battery 1 is attached in the device. If this is done, the flange portion 32 can be inserted and removed from the device simply by inserting and sliding the flange portion 32 into the guide portion. In this way, it is possible to realize a battery that has excellent mountability to equipment and that can be easily separated from the equipment when disposed after use.
• the flange width L 1 of the first flange portion 32 a on the side where the positive electrode terminal 8 and the negative electrode terminal 7 are provided is at least 1 band wider than the flange width L 2 of the second flange portion 32 b. Since the width is set to 6 mm, a protection circuit Q can be provided in this wide first flange portion 32a as shown in FIGS. 5 and 6, and the positive terminal 8 And the negative electrode terminal 7 can be electrically connected in the shortest distance. Therefore, when the protection circuit Q is provided, not only is it unnecessary to separately secure a space and a base portion, but also the wiring between the protection circuit Q and the terminals 8 and 7 can be simplified. .
• a metal cover 4 is provided at a flange 3 2 provided at the periphery of the open end of the can body 3. And the can body 3 are joined, so that, for example, even if the joining is performed by laser welding, the other parts material is isolated at a position relatively distant from the welded part. It is possible to avoid the thermal effects on various components constituting the battery 1, such as the packing 18a and 18b, the electrode body 5, and the separator (not shown). Also, if the metal lid 4 is thermally bonded to this portion via the resin by using the flange portion 32, the battery can be manufactured at a lower cost than welding.
• the battery 1 uses the dish-shaped can body 3 obtained by shallow drawing
• the battery can 2 having a thickness of 3 mm or less can be relatively easily produced.
• a material having the required characteristics can be relatively freely selected from the various materials described above. You can choose. Therefore, even though the overall thickness is 3 mm or less, a battery that can withstand piercing, bending, swelling, etc. sufficiently, in other words, is excellent in terms of stab resistance, bending resistance, swelling resistance, etc., is relatively easy. Obtainable.
• FIG. 7 shows an example in which the positive electrode terminal 8 and the protection circuit Q are arranged on the first flange portion 32 a of the battery 1.
• the protection circuit Q shown in FIG. 7 was attached to the first flange portion 32 a and provided to the negative terminal 7 and the first flange portion 32 a provided on the upper wall 3 la. It is electrically connected to the positive pole 8.
• Reference numeral 91 denotes a lead for electrically connecting the protection circuit Q and the negative terminal 7.
• On the upper surface of the protection circuit Q there are provided positive and negative external connection terminals 92 and 93 used for electrically connecting the battery 1 to an external device (not shown). Except for these points, it is the same or almost the same as the previous example.
• the same reference numerals are given and the description is omitted (the same applies to the examples described below).
• the protection circuit Q is attached to the wide first flange portion (wide flange portion) 3 2 a provided with the negative electrode terminal 8. And the negative electrode terminal 7 can be electrically connected in the shortest distance. Therefore, when the protection circuit Q is provided, it is not necessary to separately secure a space and a base for the protection circuit Q, and the wiring between the protection circuit Q and each of the terminals 8 and 7 can be simplified. Shows an example in which the positive terminal 8 and the negative terminal 7 are provided on the first flange portion (wide flange portion) 32a.
• the protection circuit Q when the protection circuit Q is attached to the first flange portion 32a as shown in the figure, the protection circuit Q is electrically connected to the negative terminal 7 and the positive terminal 8 provided on the first flange portion 32a. It is configured to: According to such a configuration, the connection between the protection circuit Q and the positive terminal 8 and the negative terminal 7 of the battery 1 can be made even easier, and the connection between the protection circuit Q and each of the terminals 8 Wiring can be further simplified.
• FIGS. 9 and 10 show an example in which the protection circuit Q is modularized and can be attached to the battery 1.
• the protection circuit Q is assembled on one surface (the lower surface in the illustrated example) of the substrate 100 to form a module.
• a plurality of (three in the illustrated example) elastic pieces 102 are provided on an outer peripheral portion on a surface side on which the protection circuit Q is mounted, on a substrate 100 constituting the protection circuit module 101. Engagement claws 102a are formed at the ends of the elastic pieces 102, respectively.
• the periphery of the first flange portion (wide flange portion) 32 a of the battery 1 On the other hand, on the periphery of the first flange portion (wide flange portion) 32 a of the battery 1, a U-shaped rising portion 35 in a plan view formed by bending in the thickness direction of the battery can 2 is provided.
• An engagement hole 35a is formed at a predetermined position on the base side of the rising portion 35. Then, the protection circuit module 101 is fitted into the rising portion 35 as shown in FIG. 9, and the engaging claw 100 of the protection circuit module 101 is inserted into the engagement hole 35a of the rising portion 35. By engaging the 2a, the protection circuit module 101 is fixed to the first flange portion 32a as shown in FIG.
• the protection circuit module 101 is fitted into the rising portion 35 provided on the first flange portion 32 a, and the engagement provided on the distal end of the elastic piece 102 is provided.
• the protection circuit Q can be easily fixed to the first flange portion 32a simply by engaging the claw 102a with the engagement hole 35a in the rising portion 35. Further, since the protection circuit Q is modularized and is not exposed to the outside, it is possible to prevent or suppress the protection circuit Q from being accidentally damaged or dust from being attached to the protection circuit Q.
• FIGS. 11 and 12 show another example in which the protection circuit Q is modularized and can be attached to the battery 1.
• the battery can 2 constituting the battery 1 is formed by welding and joining the flange portions 3 2 of the pair of can main bodies 3 in a state where the opening surfaces of the pair of can main bodies 3 are aligned.
• one of the pair of can bodies 3 is used as the metal lid according to the present invention, instead of the flat metal lid 4 as shown in FIGS. 3 and 4 above.
• the first flange part (wide flange part) 32 a is provided in the flange part 32 fitted together, as in each of the above-mentioned examples, but a predetermined position on both sides of the first flange part 32 a is provided.
• the protection circuit Q is assembled into a resin molded body 200 having at least one opening and is modularized.
• the trees that make up this protection circuit module 201 A pair of elastic pieces 202 each having a claw 202 a at the tip is provided on both sides of the oil molded body 200.
• On the inner surface of both sides of the resin molded body 200 there are formed grooves 203 into which both sides of the first flange portion 32a can be slidably fitted. Then, when the both sides of the first flange portion 32 a are fitted into these grooves 203 and slid to a predetermined position, the claws 200 of the protection circuit module 201 as shown in FIG.
• the protection circuit module 201 is fixed to the first flange portion 32a by engaging the notch portion 32m in the first flange portion 32a with the 2a.
• both sides of the first flange portion 32a are inserted into the grooves 203 provided on the inner surfaces of both sides of the protection circuit module 201 and are slid. 0 1 Only by engaging the claws 202 a of the elastic pieces 202 provided on both sides of the first notch 32 m on both sides of the first flange portion 32 a, the first flange portion 3 2
• the protection circuit Q can be easily fixed to a. Further, since the protection circuit Q is modularized and is not exposed to the outside, it is possible to prevent or suppress accidental damage to the protection circuit Q and dust from being adhered to the protection circuit Q. .
• Figures 13 and 14 show the protection circuit Q attached to the first flange part 32a of the battery 1 and an aluminum case (cover) 300 placed on top of the protection circuit Q.
• This is an example in which the portion is welded to the first flange portion 32a.
• FIG. 13 when the protective circuit Q attached to the first flange part 32a is covered with a case 300 as shown in Fig. 13 on the upper surface of the aluminum case 300, Two holes 300a are provided for exposing the connection terminals 92 and 93 to the outside of the case 300.
• the protection circuit Q attached to the wide first flange portion 32a is not exposed to the outside by being covered with the aluminum case 300. Therefore, it is possible to more reliably prevent the protection circuit Q from being accidentally scratched or dust from adhering to the protection circuit Q.
• the external connection terminals 92 and 93 for the positive and negative electrodes are provided on the predetermined surface (the surface parallel to the flange) of the protection circuit Q and the protection circuit module.
• the negative external connection terminal 93 is provided on a predetermined surface of the protection circuit Q or the protection circuit module, and the positive external connection terminal 93 is provided in the battery can (the positive electrode can). ) 2 can be used as a shared configuration.
• a pair of upper and lower contacts R and R are provided on an external device, and a battery 1 is inserted between these contacts R and R to connect the negative terminal 9 for external connection. If one contact R is brought into contact with 3 and the other contact R is brought into contact with the battery can 2 which is also the external connection terminal of the positive electrode, the external device on which the battery is mounted and the battery can be connected. Electrical connection can be easily performed. Industrial applicability
• a dish-shaped shallow drawn can is used for the can body constituting the battery can, and the peripheral portion is provided with a flange portion that is joined and integrated with the metal lid.
• This makes it possible to achieve a thin battery that has excellent mountability to the equipment to be mounted and that can be mounted with a simple circuit and a protective circuit.
• the configuration is such that the can body and the metal lid are joined and integrated by bonding using a resin, the joining and integrating work of the both during manufacturing is easier than the configuration in which the two are joined and integrated by welding. The manufacturing cost can be reduced.
• the can body and metal lid are joined by laser welding, etc. Even if it is decided to do so, the welding etc. can be performed at a position relatively distant from other parts materials, such as insulation packing, electrodes, separation, etc.
• the wide flange portion When a part of the flange portion of the can body is formed wide, the wide flange portion can be provided with a positive electrode and a Z or negative electrode output terminal or a takeout portion thereof, or a protection circuit can be attached. Therefore, the output terminal and the protection circuit can be electrically connected at the shortest distance, so that the wiring between them can be simplified. Also, there is no need to separately secure a space or a base for mounting the protection circuit, which is normally required when mounting the protection circuit on a thin battery.
• the protection circuit is built into the necessary parts in advance and modularized, that is, if the specified protection circuit module is used, Not only can the work of mounting the protection circuit be further facilitated, but also the protection circuit can be securely fixed at a predetermined position, and at the same time, the electrical connection with the output terminal can be easily performed.

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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)
• Microelectronics & Electronic Packaging (AREA)
• Sealing Battery Cases Or Jackets (AREA)
• Connection Of Batteries Or Terminals (AREA)
• Battery Mounting, Suspending (AREA)
• Gas Exhaust Devices For Batteries (AREA)

Priority Applications (3)

Applications Claiming Priority (6)

Publications (1)

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ID=27347116

Family Applications (1)

Country Status (7)

Cited By (2)

Families Citing this family (47)

Citations (14)

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• 2002
  • 2002-06-25 JP JP2002184042A patent/JP2003142043A/ja active Pending
  • 2002-07-05 WO PCT/JP2002/006870 patent/WO2003007401A1/ja not_active Ceased
  • 2002-07-05 TW TW091114940A patent/TW557594B/zh not_active IP Right Cessation
  • 2002-07-05 KR KR10-2004-7000220A patent/KR20040013123A/ko not_active Ceased
  • 2002-07-05 EP EP02743848A patent/EP1416550A4/en not_active Withdrawn
  • 2002-07-05 US US10/482,701 patent/US7524578B2/en not_active Expired - Fee Related
  • 2002-07-05 CN CNB028137353A patent/CN1263177C/zh not_active Expired - Fee Related

Patent Citations (14)

Non-Patent Citations (1)

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