WO2021235243A1 - 電池パックおよび電子機器 - Google Patents
電池パックおよび電子機器 Download PDFInfo
- Publication number
- WO2021235243A1 WO2021235243A1 PCT/JP2021/017517 JP2021017517W WO2021235243A1 WO 2021235243 A1 WO2021235243 A1 WO 2021235243A1 JP 2021017517 W JP2021017517 W JP 2021017517W WO 2021235243 A1 WO2021235243 A1 WO 2021235243A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- battery pack
- connection
- opening
- terminal
- electrode terminal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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Classifications
-
- 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
- H01M50/109—Primary casings; Jackets or wrappings characterised by their shape or physical structure of button or coin shape
-
- 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
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/117—Inorganic material
- H01M50/119—Metals
-
- 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
-
- 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
- H01M50/284—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with incorporated circuit boards, e.g. printed circuit boards [PCB]
-
- 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
- H01M50/296—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by terminals of battery packs
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
- H01M50/547—Terminals characterised by the disposition of the terminals on the cells
- H01M50/55—Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
- H01M50/588—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries outside the batteries, e.g. incorrect connections of terminals or busbars
-
- 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
- H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
- H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
- H01M50/593—Spacers; Insulating plates
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/30—Batteries in portable systems, e.g. mobile phone, laptop
-
- 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 pack and an electronic device.
- a coin-type secondary battery which is a secondary battery having a coin shape
- Patent Document 1 describes a coin-type secondary battery in which positive electrode terminals and negative electrode terminals are provided on both end faces, respectively, and the potential of one polarity is routed by an FPC (Flexible Printed Circuits). ..
- one of the objects of the present invention is to provide a battery pack and an electronic device that can appropriately secure insulation even in a configuration in which both the positive electrode terminal and the negative electrode terminal are arranged on one end surface.
- the present invention With a secondary battery, Has a circuit board and The secondary battery is With the metal exterior A first external terminal located in the center of the end face of the metal exterior, It has a second external terminal that is arranged so as to surround the circumference of the first external terminal.
- the circuit board is The first connection part connected to the first external terminal, It has a second connection that is connected to a second external terminal and has a second connection.
- An insulating portion that insulates the first connecting portion and the second connecting portion is provided.
- the first connection portion and the second connection portion are battery packs arranged in the same plane.
- the present invention may be an electronic device having the battery pack described above.
- FIG. 1 is an exploded perspective view of a battery pack according to an embodiment.
- FIG. 2 is a diagram showing an example of the appearance of the secondary battery according to the embodiment.
- FIG. 3 is a diagram referred to when explaining an example of the internal configuration of the secondary battery according to the embodiment.
- FIG. 4 is a diagram referred to when explaining a configuration example of the FPC according to the embodiment.
- FIG. 5 is a half sectional view of the battery pack according to the embodiment.
- FIG. 6 is an enlarged view of a partial cross section of the battery pack according to the embodiment.
- FIG. 7 is a diagram for explaining a modified example.
- FIG. 8 is a diagram for explaining an application example.
- FIG. 9 is a diagram for explaining an application example.
- each element constituting the present invention may be configured such that a plurality of elements are composed of the same member and the plurality of elements are combined with one member, or conversely, the function of one member is performed by the plurality of members. It can also be shared and realized.
- FIG. 1 is an exploded perspective view of a battery pack according to an embodiment.
- FIG. 2 is a diagram showing an example of the appearance of the secondary battery according to the embodiment.
- FIG. 3 is a diagram referred to when explaining an example of the internal configuration of the secondary battery according to the embodiment.
- FIG. 4 is a diagram referred to when explaining a configuration example of the FPC according to the embodiment.
- FIG. 5 is a half sectional view of the battery pack according to the embodiment.
- FIG. 6 is an enlarged view of a partial cross section of the battery pack according to the embodiment.
- the battery pack means a battery pack having a configuration in which a circuit board is connected to a secondary battery.
- the battery pack (battery pack 10) includes a secondary battery 1, a first insulating plate 2 which is an example of an insulating portion, FPC 3 which is an example of a circuit board, and other insulation. It has a second insulating plate 4 which is an example of the unit.
- the secondary battery 1 has a metal exterior portion 101 having a columnar shape.
- the first insulating plate 2, the FPC 3, and the second insulating plate 4 are sequentially laminated on the end surface 101A, which is one end surface (upper surface in FIG. 1) of the metal exterior portion 101, and are connected by an appropriate method. This completes the battery pack 10 according to the embodiment (see FIG. 5).
- a positive electrode terminal 110 which is an example of the first external terminal, is arranged in the central portion (location near the center) of the end surface 101A of the metal exterior portion 101.
- the negative electrode terminal 120 which is an example of the second external terminal, is arranged so as to surround the periphery of the positive electrode terminal 110.
- the first insulating plate 2 has a size slightly smaller than the end face 101A of the metal exterior portion 101, and has a substantially circular shape as a whole.
- a polyimide (PI) film or a non-woven fabric can be used as the first insulating plate 2.
- PI polyimide
- a non-woven fabric a non-woven fabric containing aramid fiber is more preferable from the viewpoint of insulating property and flame retardancy.
- the first insulating plate 2 has a circular opening 201 in the center and rectangular openings 202 and 203 provided around the opening 201.
- the first insulating plate 2 is attached to the end face 101A of the metal exterior portion 101 by adhesion or the like.
- the opening 201 corresponds to a third opening provided at a location corresponding to the opening 352 described later. Further, the openings 202 and 203 correspond to the fourth opening.
- the opening 202 is provided at a location corresponding to the opening 362 described later, and the opening 203 is provided at a location corresponding to the opening 372 described later.
- the FPC 3 has a connection portion 301 provided in the central portion and connection portions 302 and 303 provided around the connection portion 301.
- the connecting portion 301 is connected to the positive electrode terminal 110 via the opening 201.
- the connecting portion 302 is connected to the negative electrode terminal 120 via the opening 202.
- the connection portion 303 is connected to the negative electrode terminal 120 via the opening 203.
- the connection portion 301 corresponds to the first connection portion
- the connection portions 302 and 303 correspond to the second connection portion.
- the second insulating plate 4 covers at least a part of the opposite surface of the surface of the FPC 3 that comes into contact with the first insulating plate 2. Specifically, the second insulating plate 4 has a size sufficient to cover the connection portions 301, 302, and 303, and has a circular shape. Since the connection portion 301 connected to the positive electrode terminal 110 and the connection portions 302 and 303 connected to the negative electrode terminal 120 are blindfolded by the second insulating plate 4, the safety of the battery pack 10 can be ensured.
- a polyimide film or a non-woven fabric can be used as the second insulating plate 4. When a non-woven fabric is used, a non-woven fabric containing aramid fiber is more preferable from the viewpoint of insulating property and flame retardancy.
- the secondary battery 1 has a metal exterior portion 101.
- the metal exterior portion 101 includes, for example, a hollow cylindrical metal exterior portion 101B having an open upper portion and a lid-shaped metal exterior portion 101C arranged at an open end of the metal exterior portion 101B. Have.
- the metal exterior portion 101C forms the above-mentioned end face 101A.
- the peripheral edge of the metal exterior portion 101B and the peripheral edge of the metal exterior portion 101C are welded.
- the metal exterior portion 101C is formed with a step 130 at a predetermined position in the direction from the peripheral edge to the central portion, and the central portion side is a circular recess 131.
- a circular opening is formed in the center of the recess 131.
- the positive electrode terminal 110 described above is arranged in the recess 131 via the insulating member 132.
- the positive electrode terminal 110 and the insulating member 132 also have a circular shape, and have a circular opening at the center.
- the openings of the positive electrode terminal 110, the insulating member 132, and the recess 131 are arranged so as to communicate in the vertical direction, and the rivet 140 is driven into and crimped at the openings.
- the rivet 140 has, for example, an H-shaped cross section.
- An insulating member 135 is arranged between the rivet 140, the negative electrode terminal 120, and the insulating member 132.
- the battery element 150 is housed in the metal exterior portion 101.
- the top insulator 151 is arranged on the upper side of the battery element 150, and the bottom insulator 152 is arranged on the lower side.
- the negative electrode side of the battery element 150 is connected to the bottom surface of the metal exterior portion 101B via the negative electrode lead 160 by welding or the like. With such a connection, the entire metal exterior portion 101 has a negative polarity and functions as a negative electrode terminal 120.
- the positive electrode side of the battery element 150 is connected to the lower side of the rivet 140 via the positive electrode lead 161 for welding. With such a connection, the positive electrode terminal 110 that abuts on the rivet 140 has a positive polarity.
- the positive electrode terminal 110 for example, a nickel plate can be used.
- the metal exterior portion 101 that functions as the negative electrode terminal 120 a stainless steel one whose end face 101A is plated with nickel can be used.
- the material of the rivet 140 for example, aluminum can be used. It should be noted that these materials are examples, and are not limited to the exemplified materials.
- terminals in the positive electrode terminal or the negative electrode terminal of the present specification are not limited to physical contacts, and may have a configuration having positive or negative polarity.
- the metal exterior portion 101 in the present embodiment may have a case-like shape.
- the FPC 3 has a circular base 310, a rectangular intermediate portion 311 extending from a predetermined peripheral edge of the base 310, and an oblong shape located at the tip of the intermediate portion 311. It has a tip portion 312, and has a configuration in which these are integrally formed.
- connection portion 301 described above is formed in the center of the base portion 310. Further, the above-mentioned connection portions 302 and 303 are formed around the connection portion 301 provided on the base portion 310. In this way, the connecting portions 301, 302, and 303 are arranged in the same plane.
- connection terminal such as a copper plate connected to an external device is formed on the tip portion 312.
- connection terminal 321 and the connection terminal 322 are formed on the tip portion 312.
- connection terminal 321 and the connection terminal 322 are provided on the same substrate as the FPC 3.
- connection terminal 321 is connected to the connection portion 301 by a predetermined pattern.
- the connection terminal 321 functions as an output terminal on the positive electrode side.
- the connection terminal 322 is connected to at least one of the connection portion 302 and the connection portion 303 by a predetermined pattern.
- the connection terminal 322 functions as an output terminal on the negative electrode side.
- a connector may be provided at the tip portion 312.
- Circular hole portions 325 and hole portions 326 are formed near both ends of the tip portion 312.
- the hole portion 325 and the hole portion 326 are holes for positioning the secondary battery 1 and the FPC 3.
- the secondary battery 1 and the FPC 3 are positioned by inserting, for example, a pin-shaped jig into the hole 325 and the hole 326.
- the FPC 3 has, for example, polyimide sheets 341 and 342 laminated in two layers.
- the connection portion 301 has a tab 351.
- the tab 351 has a circular opening 352 (see FIG. 4) in the center. The vicinity of the peripheral edge of the tab 351 is sandwiched and supported by the polyimide sheets 341 and 342.
- a spare solder 353 is provided on the upper side of the exposed portion (a portion not sandwiched by the polyimide sheets 341 and 342) of the tab 351 and a spare solder 354 is provided on the lower side.
- Preliminary solder means a small amount of solder previously provided in the soldered portion in order to improve solderability, and for example, a low melting point solder paste is used.
- the connection portion 302 has a tab 361.
- a copper foil, a nickel tab, or the like can be used.
- the tab 361 has an oblong opening 362 (see FIG. 4) in the center. The vicinity of the peripheral edge of the tab 361 is sandwiched and supported by the polyimide sheets 341 and 342. As shown in FIG. 5, a spare solder 363 is provided on the upper side of the exposed portion of the tab 361, and a spare solder 364 is provided on the lower side.
- the connection portion 303 has a tab 371.
- a copper foil, a nickel tab, or the like can be used.
- the tab 371 has an oblong opening 372 (see FIG. 4) in the center. The vicinity of the peripheral edge of the tab 371 is sandwiched and supported by the polyimide sheets 341 and 342. As shown in FIGS. 4 and 6, a spare solder 373 is provided on the upper side of the exposed portion of the tab 371, and a spare solder 374 is provided on the lower side.
- the opening 352 corresponds to the first opening. Further, the openings 362 and 372 correspond to the second opening.
- the first insulating plate 2 is attached to the end surface 101A of the secondary battery 1 by adhesion or the like. Then, for example, by inserting a pin-shaped jig into the hole portion 325 and the hole portion 326, the FPC 3 is positioned. As shown in FIG. 6, in the state where the FPC 3 is positioned, the opening 352 communicates with the opening 201 of the first insulating plate 2, and the tip of the rivet 140 can be seen through the communicated portion. Further, the bottom surface of the preliminary solder 354 and the positive electrode terminal 110 face each other with a facing gap corresponding to the thickness of the first insulating plate 2.
- the opening 362 communicates with the opening 202 of the first insulating plate 2, and a part of the metal exterior portion 101C can be seen through the communicated portion.
- the bottom surface of the preliminary solder 364 and a part of the metal exterior portion 101C face each other with a facing gap corresponding to the thickness of the first insulating plate 2.
- the opening 372 communicates with the opening 203 of the first insulating plate 2, and a part of the metal exterior portion 101C can be seen through the communicated portion. It becomes a state.
- the bottom surface of the preliminary solder 374 and a part of the metal exterior portion 101C face each other with a facing gap corresponding to the thickness of the first insulating plate 2.
- the heat chip With the FPC3 positioned, for example, the heat chip is pressed against the pre-solder 353. As a result, the preliminary solder 353 is melted, and the heat of the heat chip propagates to the lower preliminary solder 354 to melt the preliminary solder 354. The molten solder flows downward. After a certain period of time, the heat chips are released and the molten solder solidifies. As a result, the tab 351 and the positive electrode terminal 110 are solder-connected.
- the heat chip is pressed against, for example, the preliminary solder 363. Similar to the solder connection in the connection portion 301 described above, the tab 361 and the metal exterior portion 101C, that is, the negative electrode terminal 120 are solder-connected. Similarly, with the FPC3 positioned, the heat chip is pressed against, for example, the preliminary solder 373. Similar to the solder connection in the connection portion 301 described above, the tab 371 and the metal exterior portion 101C, that is, the negative electrode terminal 120 are solder-connected.
- the second insulating plate 4 is attached to the upper surface of the FPC 3 by adhesion or the like in the state shown in FIG. 5, that is, after the solder connection is completed. As described above, the battery pack 10 is completed.
- connection portion 301 is connected to the connection terminal 321 by a predetermined pattern.
- the output on the positive electrode side can be output to the outside via the connection portion 301 and the connection terminal 321 soldered to the positive electrode terminal 110.
- at least one of the connection portion 302 and the connection portion 303 is connected to the connection terminal 322 by a predetermined pattern.
- the output on the negative electrode side can be output to the outside via at least one of the connection portions 302 and 303 soldered to the negative electrode terminal 120 and the connection terminal 322.
- the intermediate portion 311 of the FPC 3 may be bent when the connection terminals 321 and 322 are connected to an external device.
- connection portion 301 When the connection portion 301 is connected to the positive electrode terminal 110, the molten solder flows and the connection portion 301 is also solder-connected to the negative electrode terminal 120, which may cause a short circuit.
- connection portions 302 and 303 are connected to the negative electrode terminal 120, the molten solder flows and the connection portions 302 and 303 are also solder-connected to the positive electrode terminal 110, which may cause a short circuit.
- the first insulating plate 2 is arranged between the connecting portion 301 and the connecting portion 302, and between the connecting portion 301 and the connecting portion 303, respectively. Therefore, it is possible to prevent the occurrence of a short circuit due to the molten solder flowing to the other pole side.
- the potentials of the positive electrode and the negative electrode can be drawn from the same surface.
- the dimensions of the FPC 3 can be reduced, and the battery pack 10 can be miniaturized. It is not necessary to turn over the secondary battery 1 when connecting the FPC 3, and the process can be simplified.
- the positive electrode terminal 110 and the negative electrode terminal 120 can be appropriately insulated by the first insulating plate 2. Further, this eliminates the need to wrap the insulating tape around the secondary battery 1.
- the FPC3 in the above-described embodiment may be the FPC3A shown in FIG. 7.
- the FPC3A has a copper foil 381 formed in the center and copper foils 382 and 383 formed outside the copper foil 381 at the base 310.
- the copper foil 381 corresponds to the first connection portion
- the copper foils 382 and 383 correspond to the second connection portion. Unlike one embodiment, no opening is formed in the place where each copper foil is formed.
- the copper foil 381 is connected to the positive electrode terminal 110, and the copper foils 382 and 383 are connected to the negative electrode terminal 120. As described above, the first connection portion and the second connection portion do not necessarily have to have an opening. Each copper foil is connected by laser welding, ultrasonic welding, resistance welding, or the like.
- laser solder welding laser welding, ultrasonic welding, resistance welding, or the like may be used instead of solder connection.
- the first external terminal may be a negative electrode and the second external terminal may be a positive electrode.
- the configuration corresponding to the insulating portion may be not the first insulating plate 2 but the insulating member of the FPC 3, that is, the PI film.
- the circuit board may be an insulatingly coated metal plate instead of the FPC3.
- the rivet 140 may not be provided.
- the shape of the metal exterior portion 101 is not limited to a columnar shape, and may be another shape such as a prismatic shape.
- an IC Integrated Circuit
- the battery pack according to the present invention can be mounted on or used to supply electric power to various electronic devices such as wireless earphones, electric tools, electric vehicles and the like.
- the battery pack described above can be used as a power source for a wearable device having a function of a portable information terminal, that is, a so-called wearable terminal.
- a wearable terminal examples include, but are not limited to, a wristwatch type terminal and a glasses type terminal.
- FIG. 8 shows an example of a wearable terminal having a built-in battery pack.
- the wearable terminal 630 according to the application example is a wristwatch type terminal, and has a battery pack 632 inside thereof.
- the battery pack according to the present invention can be applied as the battery pack 632.
- the wearable terminal 630 can be worn and used by the user.
- the wearable terminal 630 may be a flexible one that can be deformed.
- the wearable terminal 630 includes an electronic circuit 631 of an electronic device main body and a battery pack 632.
- the battery pack 632 is electrically connected to the electronic circuit 631.
- the wearable terminal 630 has, for example, a configuration in which the battery pack 632 can be attached and detached by the user.
- the configuration of the wearable terminal 630 is not limited to this, and the battery pack 632 has a configuration built in the wearable terminal 630 so that the battery pack 632 cannot be removed from the wearable terminal 630 by the user. You may.
- the positive electrode terminal 634A and the negative electrode terminal 634B of the battery pack 632 are connected to the positive electrode terminal and the negative electrode terminal of the charger (not shown), respectively.
- the positive electrode terminal 634A and the negative electrode terminal 634B of the battery pack 632 are connected to the positive electrode terminal and the negative electrode terminal of the electronic circuit 631, respectively.
- the electronic circuit 631 includes, for example, a CPU, a peripheral logic unit, an interface unit, a storage unit, and the like, and controls the entire wearable terminal 630.
- the battery pack 632 includes an all-solid-state battery cell 610 (all-solid-state battery 13 in the embodiment) and a charge / discharge circuit 633.
- Second insulating plate 10 Battery pack 101 ... Metal exterior 110 ... Positive electrode terminal 120 ... Negative electrode terminal 201 ... Opening (third opening) 202, 203 ... Opening (fourth opening) 301 ... Connection part (first connection part) 302, 303 ... Connection part (second connection part) 321 and 322 ... Connection terminal 352 ... Opening (first opening) 363,364 ... Opening (second opening)
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Battery Mounting, Suspending (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
Description
二次電池と、
回路基板と
を有し、
二次電池は、
金属外装部と、
金属外装部の端面の中心部に配置される第1の外部端子と、
第1の外部端子の周囲を取り囲むように配置される第2の外部端子と
を有し、
回路基板は、
第1の外部端子に接続される第1の接続部と、
第2の外部端子に接続される第2の接続部と
を有し、
第1の接続部と第2の接続部とを絶縁する絶縁部が設けられており、
第1の接続部および第2の接続部は、同一平面内に配置されている
電池パックである。
本発明は、上述した電池パックを有する電子機器でもよい。
<一実施形態>
<変形例>
<応用例>
以下に説明する実施形態等は本発明の好適な具体例であり、本発明の内容がこれらの実施形態等に限定されるものではない。
なお、特許請求の範囲に示される部材を、実施形態の部材に特定するものではない。特に、実施形態に記載されている構成部材の寸法、材質、形状、その相対的配置、上下左右等の方向の記載等は特に限定する旨の記載がない限りは、本発明の範囲をそれのみに限定する趣旨ではなく、単なる説明例にすぎない。なお、各図面が示す部材の大きさや位置関係等は、説明を明確にするため誇張していることがあり、また、図示が煩雑となることを防止するために、参照符号の一部のみを図示する場合や一部の図示を簡略化する場合もある。さらに以下の説明において、同一の名称、符号については同一もしくは同質の部材を示しており、重複する説明を適宜省略する。さらに、本発明を構成する各要素は、複数の要素を同一の部材で構成して一の部材で複数の要素を兼用する態様としてもよいし、逆に一の部材の機能を複数の部材で分担して実現することもできる。
[電池パックの構成例]
図1~図6を参照して、一実施形態に係る電池パックの構成例について説明する。図1は、一実施形態に係る電池パックの分解斜視図である。図2は、一実施形態に係る二次電池の外観例を示す図である。図3は、一実施形態に係る二次電池の内部構成例を説明する際に参照される図である。図4は、一実施形態に係るFPCの構成例を説明する際に参照される図である。図5は、一実施形態に係る電池パックの半部断面図である。図6は、一実施形態に係る電池パックの一部断面を拡大した図である。なお、本明細書において、電池パックとは、二次電池に回路基板が接続された構成を有するものをいう。
次に、一実施形態に係る二次電池1の詳細について説明する。上述したように、二次電池1は、金属外装部101を有している。図2に示すように、金属外装部101は、例えば、上方が開放された中空円柱状の金属外装部101Bと、金属外装部101Bの開放端に配置される蓋状の金属外装部101Cとを有する。金属外装部101Cが上述した端面101Aを形成する。例えば、金属外装部101Bの周縁と金属外装部101Cの周縁とが溶接される。
次に、一実施形態に係るFPC3の詳細について説明する。図4および図5に示すように、FPC3は、円形状の基部310と、基部310の所定の周縁から延在する矩形状の中間部311と、中間部311の先端に位置する長楕円形状の先端部312とを有し、これらが一体的に形成された構成を有している。
次に、電池パック10の製造方法の一例について説明する。始めに、二次電池1の端面101Aに第1の絶縁板2が接着等によって取り付けられる。そして、孔部325および孔部326に対して、例えば、ピン状の治具を挿入することにより、FPC3の位置決めがなされる。図6に示すように、FPC3の位置決めがなされた状態では、開口部352が第1の絶縁板2の開口部201と通じ、通じた箇所を介してリベット140の先端が見える状態となる。また、予備半田354の底面と正極端子110とが、第1の絶縁板2の厚み分の対向間隙をもって対向する。さらに、FPC3の位置決めがなされた状態では、開口部362が第1の絶縁板2の開口部202と通じ、通じた箇所を介して金属外装部101Cの一部が見える状態となる。また、予備半田364の底面と金属外装部101Cの一部の箇所とが、第1の絶縁板2の厚み分の対向間隙をもって対向する。さらに、図6に示すように、FPC3の位置決めがなされた状態では、開口部372が第1の絶縁板2の開口部203と通じ、通じた箇所を介して金属外装部101Cの一部が見える状態となる。また、予備半田374の底面と金属外装部101Cの一部の箇所とが、第1の絶縁板2の厚み分の対向間隙をもって対向する。
本実施形態によれば、下記の効果が得られる。
正極および負極の電位を同一面から引き出すことができる。FPC3の寸法を小さくすることができ、電池パック10の小型化を図ることができる。
FPC3を接続するにあたって二次電池1を裏返す必要がなく、工程を簡略化することができる。
第1の絶縁板2によって、正極端子110および負極端子120を適切に絶縁することができる。また、これにより二次電池1の周囲に絶縁テープを巻き付ける必要がなくなる。
FPC3をチューブで保持し、チューブで保持する面上に部品を実装するとFPC3の保持力が低下するが本実施形態によればそのような問題が生じないため耐衝撃性が向上する。
以上、本発明の一実施形態について具体的に説明したが、本発明の内容は上述した実施形態に限定されるものではなく、本発明の技術的思想に基づく各種の変形が可能である。
本発明にかかる電池パックは、ワイヤレスイヤホン等の各種の電子機器、電動工具、電動車両等に搭載又は電力を供給するために使用することができる。
電子回路631は、例えば、CPU、周辺ロジック部、インターフェース部および記憶部等を備え、ウェアラブル端末630の全体を制御する。
電池パック632は、全固体電池セル610(実施形態における全固体電池13)と、充放電回路633とを備える。
2・・・第1の絶縁板
3・・・FPC
4・・・第2の絶縁板
10・・・電池パック
101・・・金属外装部
110・・・正極端子
120・・・負極端子
201・・・開口部(第3の開口部)
202,203・・・開口部(第4の開口部)
301・・・接続部(第1の接続部)
302,303・・・接続部(第2の接続部)
321,322・・・接続端子
352・・・開口部(第1の開口部)
363、364・・・開口部(第2の開口部)
Claims (10)
- 二次電池と、
回路基板と
を有し、
前記二次電池は、
金属外装部と、
前記金属外装部の端面の中心部に配置される第1の外部端子と、
前記第1の外部端子の周囲を取り囲むように配置される第2の外部端子と
を有し、
前記回路基板は、
前記第1の外部端子に接続される第1の接続部と、
前記第2の外部端子に接続される第2の接続部と
を有し、
前記第1の接続部と前記第2の接続部とを絶縁する絶縁部が設けられており、
前記第1の接続部および前記第2の接続部は、同一平面内に配置されている
電池パック。 - 前記回路基板は、FPCまたは絶縁被覆された金属板により構成される
請求項1に記載の電池パック。 - 前記絶縁部はポリイミドフィルムまたは不織布である
請求項1または2に記載の電池パック。 - 前記第1の接続部は、第1の開口部を有し、
前記第2の接続部は、第2の開口部を有し、
前記絶縁部は、前記第1の開口部に対応する箇所に設けられた第3の開口部および前記第2の開口部に対応する箇所に設けられた第4の開口部を有する
請求項1から3までの何れかに記載の電池パック。 - 前記回路基板の前記絶縁部と接触する面の反対面の少なくとも一部が、前記絶縁部と異なる他の絶縁部により覆われている
請求項1から4までの何れかに記載の電池パック。 - 前記他の絶縁部がポリイミドフィルムまたは不織布である
請求項5に記載の電池パック。 - 前記回路基板は、外部機器と接続される接続端子を有する
請求項1から6までの何れかに記載の電池パック。 - 前記接続端子は、前記回路基板と同一の基板上に設けられる
請求項7に記載の電池パック。 - 前記金属外装部が、円柱状の形状を有している
請求項1から8までの何れかに記載の電池パック。 - 請求項1から9までの何れかに記載の電池パックを有する電子機器。
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|---|---|---|---|
| JP2022524379A JP7327664B2 (ja) | 2020-05-21 | 2021-05-07 | 電池パックおよび電子機器 |
| CN202180036272.5A CN115668631B (zh) | 2020-05-21 | 2021-05-07 | 电池包以及电子设备 |
| US17/988,206 US12597673B2 (en) | 2020-05-21 | 2022-11-16 | Battery pack and electronic device |
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| WO2021235243A1 true WO2021235243A1 (ja) | 2021-11-25 |
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| US (1) | US12597673B2 (ja) |
| JP (1) | JP7327664B2 (ja) |
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|---|---|---|---|---|
| WO2024202307A1 (ja) * | 2023-03-31 | 2024-10-03 | 株式会社村田製作所 | 電池ユニットおよび電池用配線ユニット |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN121238105A (zh) * | 2024-06-26 | 2025-12-30 | 宁德时代新能源科技股份有限公司 | 电池单体及其制造方法、电池、用电装置及储能装置 |
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| JPH058865U (ja) * | 1991-07-15 | 1993-02-05 | 日立マクセル株式会社 | 扁平形無機非水電解液電池 |
| JP2012190759A (ja) * | 2011-03-14 | 2012-10-04 | Hitachi Maxell Energy Ltd | 電池ユニット及び該電池ユニットと電気機器との接続端子構造 |
| WO2012147375A1 (ja) * | 2011-04-27 | 2012-11-01 | 日立マクセルエナジー株式会社 | 電池ユニット |
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|---|---|---|---|---|
| US3907593A (en) * | 1974-05-17 | 1975-09-23 | Gte Laboratories Inc | Electrochemical cells |
| KR100891079B1 (ko) * | 2005-02-07 | 2009-03-30 | 주식회사 엘지화학 | 전지 모듈용 전지 카트리지 연결 시스템 |
| JP6045831B2 (ja) | 2012-07-13 | 2016-12-14 | 日立マクセル株式会社 | 電池ユニット |
| EP2950381B1 (fr) * | 2014-05-28 | 2016-12-14 | EM Microelectronic-Marin SA | Batterie intelligente avec un circuit de gestion de la tension d'alimentation, et procédé de fabrication de la batterie |
| KR102123674B1 (ko) * | 2017-01-19 | 2020-06-16 | 주식회사 엘지화학 | 전극단자 접속 플레이트를 포함하고 있는 전지팩 |
| JP6556175B2 (ja) * | 2017-02-28 | 2019-08-07 | 矢崎総業株式会社 | 導電モジュール、及び、電池パック |
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2021
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- 2021-05-07 CN CN202180036272.5A patent/CN115668631B/zh active Active
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH058865U (ja) * | 1991-07-15 | 1993-02-05 | 日立マクセル株式会社 | 扁平形無機非水電解液電池 |
| JP2012190759A (ja) * | 2011-03-14 | 2012-10-04 | Hitachi Maxell Energy Ltd | 電池ユニット及び該電池ユニットと電気機器との接続端子構造 |
| WO2012147375A1 (ja) * | 2011-04-27 | 2012-11-01 | 日立マクセルエナジー株式会社 | 電池ユニット |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024202307A1 (ja) * | 2023-03-31 | 2024-10-03 | 株式会社村田製作所 | 電池ユニットおよび電池用配線ユニット |
| JPWO2024202307A1 (ja) * | 2023-03-31 | 2024-10-03 | ||
| JP7841651B2 (ja) | 2023-03-31 | 2026-04-07 | 株式会社村田製作所 | 電池ユニットおよび電池用配線ユニット |
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| CN115668631A (zh) | 2023-01-31 |
| JP7327664B2 (ja) | 2023-08-16 |
| US20230071591A1 (en) | 2023-03-09 |
| CN115668631B (zh) | 2025-07-15 |
| US12597673B2 (en) | 2026-04-07 |
| JPWO2021235243A1 (ja) | 2021-11-25 |
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