JPWO2019004296A1 - Battery module and method for manufacturing battery module - Google Patents
Battery module and method for manufacturing battery module Download PDFInfo
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- JPWO2019004296A1 JPWO2019004296A1 JP2019526989A JP2019526989A JPWO2019004296A1 JP WO2019004296 A1 JPWO2019004296 A1 JP WO2019004296A1 JP 2019526989 A JP2019526989 A JP 2019526989A JP 2019526989 A JP2019526989 A JP 2019526989A JP WO2019004296 A1 JPWO2019004296 A1 JP WO2019004296A1
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- 238000004519 manufacturing process Methods 0.000 title claims description 10
- 238000000034 method Methods 0.000 title description 4
- 238000012544 monitoring process Methods 0.000 claims abstract description 64
- 238000003466 welding Methods 0.000 claims description 6
- 238000005476 soldering Methods 0.000 claims 1
- 238000003860 storage Methods 0.000 description 9
- 239000003792 electrolyte Substances 0.000 description 5
- 239000004743 Polypropylene Substances 0.000 description 4
- 229910000679 solder Inorganic materials 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000008151 electrolyte solution Substances 0.000 description 2
- 229910021450 lithium metal oxide Inorganic materials 0.000 description 2
- 239000007773 negative electrode material Substances 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- 239000007774 positive electrode material Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910012851 LiCoO 2 Inorganic materials 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 229910000625 lithium cobalt oxide Inorganic materials 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- BFZPBUKRYWOWDV-UHFFFAOYSA-N lithium;oxido(oxo)cobalt Chemical compound [Li+].[O-][Co]=O BFZPBUKRYWOWDV-UHFFFAOYSA-N 0.000 description 1
- VROAXDSNYPAOBJ-UHFFFAOYSA-N lithium;oxido(oxo)nickel Chemical compound [Li+].[O-][Ni]=O VROAXDSNYPAOBJ-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229920006254 polymer film Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
-
- 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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
- H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
- H01M50/211—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for pouch cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/569—Constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals
-
- 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
- H01M2220/10—Batteries in stationary systems, e.g. emergency power source in plant
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
本発明の電池モジュールは、筐体２０と、筐体２０内に積層されて収容される複数の電池ユニット３０と、電池ユニット３０の電極タブ３１に溶接されるバスバー４０と、バスバー４０および電池ユニット３０の電圧を測定する測定部に接続される電圧監視線５０と、を備え、バスバー４０は、電極タブ３１近傍にて筐体２０に保持され、バスバー４０と電圧監視線５０は、電圧監視線５０の端子部５１にて、筐体２０に対して固定されることなく、接続されている。The battery module of the present invention includes a housing 20, a plurality of battery units 30 stacked and housed in the housing 20, a bus bar 40 welded to an electrode tab 31 of the battery unit 30, a bus bar 40, and a battery unit. A voltage monitoring line 50 connected to a measuring unit for measuring the voltage of 30. The bus bar 40 is held in the housing 20 near the electrode tab 31, and the bus bar 40 and the voltage monitoring line 50 are the voltage monitoring line. The terminal portion 51 of 50 is connected to the housing 20 without being fixed.
Description
本発明は、電池モジュールおよび電池モジュールの製造方法に関する。
本願は、２０１７年６月２７日に、日本に出願された特願２０１７−１２４９０３号に基づき優先権を主張し、その内容をここに援用する。The present invention relates to a battery module and a method for manufacturing a battery module.
The present application claims priority based on Japanese Patent Application No. 2017-124903 filed in Japan on June 27, 2017, and the content thereof is incorporated herein.
近年、一般の家屋内に、太陽電池パネル等で発電した電気エネルギーを夜間にも使えるように蓄えておくために蓄電池ユニットが設置されている。この蓄電池ユニットは、筐体と、その筐体内にて積層されて収容される複数の電池モジュールとを備えている。 In recent years, a storage battery unit has been installed in a general house in order to store electric energy generated by a solar cell panel or the like so that it can be used even at night. This storage battery unit includes a housing and a plurality of battery modules that are stacked and housed in the housing.
電池モジュールは、筐体と、その内部に収容される複数の蓄電体と、蓄電体の電極タブに溶接されるバスバーと、バスバーおよび蓄電体の電圧を測定する測定部に接続される電圧監視線と、を備える。電池モジュールにおいて、バスバーと電圧監視線は、電圧監視線の端子部にて、筐体に対してネジ止めされている（例えば、特許文献１参照）。 The battery module includes a housing, a plurality of power storage units housed therein, a bus bar welded to an electrode tab of the power storage unit, and a voltage monitoring line connected to a measuring unit that measures the voltage of the bus bar and the power storage unit. And In the battery module, the bus bar and the voltage monitoring line are screwed to the housing at the terminal part of the voltage monitoring line (for example, see Patent Document 1).
しかしながら、特許文献１に記載されているような電池モジュールは、振動が加えられると、バスバーが断線することがあった。 However, in the battery module described in Patent Document 1, the bus bar may be broken when vibration is applied.
本発明は、上記事情に鑑みてなされたものであって、振動が加えられても、バスバーが断線することを防止した電池モジュールを提供することを目的とする。 The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a battery module that prevents the bus bar from breaking even when vibration is applied.
［１］筐体と、該筐体内に積層されて収容される複数の電池ユニットと、前記複数の電池ユニットの電極タブにそれぞれ溶接される複数のバスバーと、前記複数の電池ユニットのそれぞれの電圧を測定する測定部および前記複数のバスバーにそれぞれ接続される複数の電圧監視線と、を備え、各バスバーは、前記電極タブ近傍にて前記筐体に保持され、前記複数のバスバーと前記複数の電圧監視線の少なくとも１組は、前記電圧監視線の端子部にて、前記筐体に対して固定されることなく、接続されている電池モジュール。 [1] Housing, a plurality of battery units stacked and housed in the housing, a plurality of bus bars welded to electrode tabs of the plurality of battery units, and a voltage of each of the plurality of battery units And a plurality of voltage monitoring lines respectively connected to the plurality of bus bars, each bus bar is held in the housing near the electrode tab, and the plurality of bus bars and the plurality of bus bars. A battery module in which at least one set of voltage monitoring lines is connected to a terminal portion of the voltage monitoring line without being fixed to the housing.
［２］前記複数のバスバーと前記複数の電圧監視線は、それぞれ独立してリベット、はんだ、溶接、ネジおよびかしめからなる群から選択される少なくとも１つの接続手段によって接続されている［１］に記載の電池モジュール。 [2] The plurality of bus bars and the plurality of voltage monitoring lines are independently connected to [1] by at least one connecting means selected from the group consisting of rivets, solders, welding, screws and caulking. The battery module described.
［３］前記複数のバスバーと前記複数の電圧監視線は、それぞれ一体的に形成されている［１］に記載の電池モジュール。
［４］筐体と、該筐体内に積層されて収容される複数の電池ユニットと、前記複数の電池ユニットの電極タブにそれぞれ溶接される複数のバスバーと、前記複数の電池ユニットのそれぞれの電圧を測定する測定部および前記複数のバスバーにそれぞれ接続される複数の電圧監視線と、を備え、各バスバーは、前記電極タブ近傍にて前記筐体に保持されている電池モジュールの製造方法であって、前記複数のバスバーと前記複数の電圧監視線の少なくとも１組を、前記電圧監視線の端子部にて、前記筐体に対して固定することなく、接続することを含む電池モジュールの製造方法。[3] The battery module according to [1], wherein the plurality of bus bars and the plurality of voltage monitoring lines are integrally formed.
[4] Housing, a plurality of battery units stacked and housed in the housing, a plurality of bus bars welded to electrode tabs of the plurality of battery units, and a voltage of each of the plurality of battery units And a plurality of voltage monitoring lines respectively connected to the plurality of bus bars, each bus bar being a method of manufacturing a battery module held in the casing near the electrode tab. And a method of manufacturing a battery module, which includes connecting at least one set of the plurality of bus bars and the plurality of voltage monitoring lines to a terminal portion of the voltage monitoring line without fixing the same to the housing. ..
本発明によれば、振動が加えられても、バスバーが断線することを防止した電池モジュールを提供することができる。 According to the present invention, it is possible to provide a battery module that prevents the bus bar from breaking even when vibration is applied.
本発明の電池モジュールの実施の形態について説明する。
なお、本実施の形態は、発明の趣旨をより良く理解させるために具体的に説明するものであり、特に指定のない限り、本発明を限定するものではない。An embodiment of the battery module of the present invention will be described.
It should be noted that the present embodiment is specifically described for better understanding of the gist of the invention, and does not limit the present invention unless otherwise specified.
［電池モジュール］
（１）第１の実施形態
図１Ａは、本実施形態の電池モジュールの概略構成を示す正面図である。図１Ｂは、本発明の電池モジュールの第１の実施形態の概略構成を示す図であり、図１Ａにおける領域αの拡大図であり、図１Ａの奥行き方向に沿う断面図である。
本実施形態の電池モジュール１０は、筐体２０と、筐体２０内に積層されて収容される複数の電池ユニット３０と、電池ユニット３０の電極タブ３１に溶接されるバスバー４０と、バスバー４０および電池ユニット３０の電圧を測定する測定部（図示略）に接続される電圧監視線５０と、を備える。[Battery module]
(1) First Embodiment FIG. 1A is a front view showing a schematic configuration of a battery module of the present embodiment. 1B is a diagram showing a schematic configuration of a first embodiment of a battery module of the present invention, an enlarged view of a region α in FIG. 1A, and a sectional view taken along the depth direction of FIG. 1A.
The battery module 10 of the present embodiment includes a housing 20, a plurality of battery units 30 stacked and housed in the housing 20, a bus bar 40 welded to an electrode tab 31 of the battery unit 30, a bus bar 40, and A voltage monitoring line 50 connected to a measuring unit (not shown) that measures the voltage of the battery unit 30.
バスバー４０は、図１Ｂに示すように、電池モジュール１０の正面（電池モジュール１０の長手方向と垂直な端面）１０ａ側において、電池ユニット３０の電極タブ３１近傍にて筐体２０に保持されている。すなわち、バスバー４０は、筐体２０に形成されたバスバーの挿入部（隙間）に挿入されることにより、筐体２０に保持されている。 As shown in FIG. 1B, the bus bar 40 is held by the housing 20 in the vicinity of the electrode tab 31 of the battery unit 30 on the front surface (the end surface perpendicular to the longitudinal direction of the battery module 10) 10a of the battery module 10. .. That is, the bus bar 40 is held in the housing 20 by being inserted into the insertion portion (gap) of the bus bar formed in the housing 20.
電池ユニット３０の電極タブ３１とバスバー４０は、溶接部６０にて溶接されることにより、接続されている。 The electrode tab 31 of the battery unit 30 and the bus bar 40 are connected by being welded at the welding portion 60.
バスバー４０と電圧監視線５０は、電圧監視線５０の端子部５１にて、筐体２０に対して固定されることなく、接続されている。より詳細には、図１Ｂに示すように、バスバー４０と電圧監視線５０は、端子部５１にて、接続手段としてのリベット７０によって接続されている。さらに、そのリベット７０が、電池モジュール１０の正面１０ａ側において、筐体２０に電池モジュール１０の奥行き方向に凹むように形成された凹部２１内に収容されている。この場合、リベット７０と凹部２１の間には、隙間があることが好ましい。
尚、本実施形態においては、複数の電池ユニット３０に対応して、複数組のバスバー４０および電圧監視線５０が設けられているが、この複数組のうち少なくとも１組が筐体２０に対して固定されることなく、接続されていればよい。振動などによりバスバーが断線することをより確実に防止する観点のみならず、電池モジュール１０の製造を容易にする観点からは、好ましくは前記複数組のうち１／３以上が、より好ましくは１／２以上が、さらに好ましくは２／３以上が、最も好ましくは全てが筐体２０に対して固定されることなく、接続されている。特に、電池ユニット３０が直列に接続されている場合には、前記複数組の全てが筐体２０に対して固定されることなく、接続されていることが好ましい。
また、ここで「固定」とは、機械的接合、溶着、接着等により一定以上の力を加えても筐体２０から脱離しないように筐体２０に接合された状態を指す。バスバー４０および電圧監視線５０が、筐体２０に対して移動可能な状態で単に接しているような状態は「固定」には含まれない。The bus bar 40 and the voltage monitoring line 50 are connected to the housing 20 at the terminal portion 51 of the voltage monitoring line 50 without being fixed. More specifically, as shown in FIG. 1B, the bus bar 40 and the voltage monitoring line 50 are connected at a terminal portion 51 by a rivet 70 as a connecting means. Further, the rivet 70 is housed in the recess 21 formed in the housing 20 so as to be recessed in the depth direction of the battery module 10 on the front surface 10 a side of the battery module 10. In this case, it is preferable that there is a gap between the rivet 70 and the recess 21.
In the present embodiment, a plurality of sets of bus bars 40 and voltage monitoring lines 50 are provided corresponding to the plurality of battery units 30, but at least one of the plurality of sets is provided with respect to the housing 20. It need only be connected without being fixed. From the viewpoint of more reliably preventing disconnection of the bus bar due to vibration and the like, from the viewpoint of facilitating the manufacture of the battery module 10, preferably 1/3 or more, more preferably 1/3 of the plurality of sets. Two or more, more preferably 2/3 or more, and most preferably all are connected to the housing 20 without being fixed. Particularly, when the battery units 30 are connected in series, it is preferable that all of the plurality of sets are connected to the housing 20 without being fixed.
The term “fixed” as used herein refers to a state of being bonded to the housing 20 so as not to separate from the housing 20 even if a force of a certain level or more is applied by mechanical bonding, welding, adhesion, or the like. “Fixed” does not include a state in which the bus bar 40 and the voltage monitoring line 50 are merely in contact with the housing 20 in a movable state.
電池ユニット３０の構成は、特に限定されない。例えば、図２に示すように、電池ユニット３０はシート状（板状）に形成されている。電池ユニット３０は、蓄電体３２と、蓄電体３２を収容する外装体３３と、外装体３３内に充填された電解質３４と、を備える。 The configuration of the battery unit 30 is not particularly limited. For example, as shown in FIG. 2, the battery unit 30 is formed in a sheet shape (plate shape). The battery unit 30 includes a power storage body 32, an exterior body 33 that houses the power storage body 32, and an electrolyte 34 filled in the exterior body 33.
蓄電体３２は、正極部３５および負極部３６が、電池ユニット３０の厚さ方向に交互に重ねられて構成されている。正極部３５は、正極シート（図示略）と、その主面に設けられた正極活物質層（図示略）とを備えている。負極部３６は、負極シート（図示略）と、その主面に設けられた負極活物質層（図示略）とを備えている。
正極部３５と負極部３６との間には、セパレータ３７が配置されている。すなわち、正極部３５、セパレータ３７、負極部３６、セパレータ３７、正極部３５、・・・、の順に積層することで、蓄電体３２が構成されている。The power storage unit 32 is configured by stacking positive electrode portions 35 and negative electrode portions 36 alternately in the thickness direction of the battery unit 30. The positive electrode portion 35 includes a positive electrode sheet (not shown) and a positive electrode active material layer (not shown) provided on the main surface thereof. The negative electrode portion 36 includes a negative electrode sheet (not shown) and a negative electrode active material layer (not shown) provided on the main surface thereof.
A separator 37 is arranged between the positive electrode portion 35 and the negative electrode portion 36. That is, the power storage unit 32 is configured by stacking the positive electrode portion 35, the separator 37, the negative electrode portion 36, the separator 37, the positive electrode portion 35, ... In this order.
正極シートとしては、アルミニウム箔等を用いることができる。正極活物質層には、一般式「ＬｉＭｘＯｙ（式中、Ｍは金属であり；ｘおよびｙは、金属Ｍと酸素Ｏとの組成比である）」で表される金属酸リチウム化合物等が用いられる。このような金属酸リチウム化合物としては、コバルト酸リチウム（ＬｉＣｏＯ２）、ニッケル酸リチウム（ＬｉＮｉＯ２）等が例示できる。
負極シートとしては、銅箔等を用いることができる。負極活物質層には、黒鉛（グラファイト）や酸化ケイ素等が用いられる。
セパレータ３７の材質は、特に限定されないが、微多孔性の高分子膜、不織布、ガラスファイバー等が挙げられる。Aluminum foil or the like can be used as the positive electrode sheet. The positive electrode active material layer has a lithium metal oxide compound represented by the general formula “LiM x O y (where M is a metal; x and y are the composition ratios of the metal M and oxygen O)”. Etc. are used. Examples of such a lithium metal oxide compound include lithium cobalt oxide (LiCoO 2 ), lithium nickel oxide (LiNiO 2 ), and the like.
Copper foil or the like can be used as the negative electrode sheet. Graphite, silicon oxide, or the like is used for the negative electrode active material layer.
The material of the separator 37 is not particularly limited, and examples thereof include a microporous polymer film, non-woven fabric, and glass fiber.
外装体３３の構成は、特に限定されない。外装体３３は、例えば、内層側から変性ＰＰ（ポリプロピレン）層、アルミニウム層、ナイロン層、およびＰＥＴ（ポリエチレンテレフタレート）層が積層された第１積層フィルム３８および第２積層フィルム３９を有している。
第１積層フィルム３８の変性ＰＰ層の縁部と第２積層フィルム３９の変性ＰＰ層の縁部とが溶着することで、外装体３３が袋状に構成される。The configuration of the outer casing 33 is not particularly limited. The outer package 33 has, for example, a first laminated film 38 and a second laminated film 39 in which a modified PP (polypropylene) layer, an aluminum layer, a nylon layer, and a PET (polyethylene terephthalate) layer are laminated from the inner layer side. ..
By welding the edge of the modified PP layer of the first laminated film 38 and the edge of the modified PP layer of the second laminated film 39, the exterior body 33 is formed into a bag shape.
電解質３４は特に限定されず、例えば、公知のリチウムイオン二次電池で用いられる電解質、電解液等が適用可能である。電解液としては、有機溶媒に電解質塩を溶解した混合溶液を例示できる。 The electrolyte 34 is not particularly limited, and for example, an electrolyte used in a known lithium ion secondary battery, an electrolytic solution, or the like can be applied. Examples of the electrolytic solution include a mixed solution in which an electrolyte salt is dissolved in an organic solvent.
電池ユニット３０は、図示しない一対のタブ（端子）を備えている。電池ユニット３０は、一対のタブを通して充電したり放電したりすることができる。
電池ユニット３０は、１枚または複数枚の質量が、例えば、数１０ｋｇや１００ｋｇ等と、比較的重い。The battery unit 30 includes a pair of tabs (terminals) not shown. The battery unit 30 can be charged and discharged through a pair of tabs.
The mass of one or a plurality of the battery units 30 is relatively heavy, for example, several tens kg or 100 kg.
本実施形態の電池モジュール１０では、バスバー４０と電圧監視線５０が、電圧監視線５０の端子部５１にて、筐体２０に対して固定されることなく、接続されている。そのため、電圧監視線５０の端子部５１に振動が加えられても、バスバー４０が断線することを防止できる。 In the battery module 10 of the present embodiment, the bus bar 40 and the voltage monitoring line 50 are connected to the housing 20 at the terminal portion 51 of the voltage monitoring line 50 without being fixed. Therefore, even if vibration is applied to the terminal portion 51 of the voltage monitoring line 50, the bus bar 40 can be prevented from breaking.
（２）第２の実施形態
図３は、本実施形態の電池モジュールにおける、バスバーと電圧監視線の接続構造の概略を示す平面図である。図３において、図１に示す構成と同一の構成については同一の符号を付して説明を省略する。
本実施形態では、バスバー４０と電圧監視線５０が、電圧監視線５０の端子部５１にて、筐体２０に対して固定されることなく、接続されている。より詳細には、図３に示すように、バスバー４０と電圧監視線５０は、端子部５１にて、接続手段としてのはんだ８０によって接続されている。さらに、そのはんだ８０を含む接続部が、電池モジュール１０の正面１０ａ側において、筐体２０に固定されない。(2) Second Embodiment FIG. 3 is a plan view showing the outline of the connection structure of the bus bar and the voltage monitoring line in the battery module of the present embodiment. In FIG. 3, the same components as those shown in FIG. 1 are designated by the same reference numerals and the description thereof will be omitted.
In the present embodiment, the bus bar 40 and the voltage monitoring line 50 are connected to the housing 20 at the terminal portion 51 of the voltage monitoring line 50 without being fixed. More specifically, as shown in FIG. 3, the bus bar 40 and the voltage monitoring line 50 are connected at the terminal portion 51 by a solder 80 as a connecting means. Further, the connecting portion including the solder 80 is not fixed to the housing 20 on the front surface 10a side of the battery module 10.
本実施形態の電池モジュールによれば、第１の実施形態の電池モジュール１０と同様の効果が得られる。 According to the battery module of this embodiment, the same effect as that of the battery module 10 of the first embodiment can be obtained.
（３）第３の実施形態
図４は、本実施形態の電池モジュールにおける、バスバーと電圧監視線の接続構造の概略を示す平面図である。図４において、図１に示す構成と同一の構成については同一の符号を付して説明を省略する。
本実施形態では、バスバー４０と電圧監視線５０は、電圧監視線５０の端子部５１にて、筐体２０に対して固定されることなく、接続されている。より詳細には、図４に示すように、バスバー４０と電圧監視線５０は、端子部５１にて、接続手段としての溶接部９０によって接続されている。さらに、その溶接部９０を含む接続部が、電池モジュール１０の正面１０ａ側において、筐体２０に固定されない。(3) Third Embodiment FIG. 4 is a plan view showing the outline of the connection structure of the bus bar and the voltage monitoring line in the battery module of the present embodiment. 4, the same components as those shown in FIG. 1 are designated by the same reference numerals and the description thereof will be omitted.
In the present embodiment, the bus bar 40 and the voltage monitoring line 50 are connected to the housing 20 at the terminal portion 51 of the voltage monitoring line 50 without being fixed. More specifically, as shown in FIG. 4, the bus bar 40 and the voltage monitoring wire 50 are connected to each other at a terminal portion 51 by a welding portion 90 as a connecting means. Further, the connecting portion including the welded portion 90 is not fixed to the housing 20 on the front surface 10a side of the battery module 10.
本実施形態の電池モジュールによれば、第１の実施形態の電池モジュール１０と同様の効果が得られる。 According to the battery module of this embodiment, the same effect as that of the battery module 10 of the first embodiment can be obtained.
（４）第４の実施形態
図５は、本実施形態の電池モジュールにおける、バスバーと電圧監視線の接続構造の概略を示す平面図である。図５において、図１に示す構成と同一の構成については同一の符号を付して説明を省略する。
本実施形態では、バスバー４０と電圧監視線５０は、電圧監視線５０の端子部５１にて、筐体２０に対して固定されることなく、接続されている。より詳細には、図５に示すように、バスバー４０と電圧監視線５０は、端子部５１にて、接続手段としてのネジ１００によって接続されている。さらに、そのネジ１００が、電池モジュール１０の正面１０ａ側において、筐体２０に電池モジュール１０の奥行き方向に凹むように形成された凹部内に収容されている。この場合、ネジ１００と凹部の間には、隙間があることが好ましい。(4) Fourth Embodiment FIG. 5 is a plan view showing the outline of the connection structure of the bus bar and the voltage monitoring line in the battery module of the present embodiment. 5, the same components as those shown in FIG. 1 are designated by the same reference numerals and the description thereof will be omitted.
In the present embodiment, the bus bar 40 and the voltage monitoring line 50 are connected to the housing 20 at the terminal portion 51 of the voltage monitoring line 50 without being fixed. More specifically, as shown in FIG. 5, the bus bar 40 and the voltage monitoring line 50 are connected at the terminal portion 51 by a screw 100 as a connecting means. Further, the screw 100 is housed in a recess formed in the housing 20 so as to be recessed in the depth direction of the battery module 10 on the front surface 10 a side of the battery module 10. In this case, it is preferable that there is a gap between the screw 100 and the recess.
本実施形態の電池モジュールによれば、第１の実施形態の電池モジュール１０と同様の効果が得られる。 According to the battery module of this embodiment, the same effect as that of the battery module 10 of the first embodiment can be obtained.
（５）第５の実施形態
図６は、本実施形態の電池モジュールにおける、バスバーと電圧監視線の接続構造の概略を示す平面図である。図６において、図１に示す構成と同一の構成については同一の符号を付して説明を省略する。
本実施形態では、バスバー４０と電圧監視線５０は、電圧監視線５０の端子部５１にて、筐体２０に対して固定されることなく、接続されている。より詳細には、図６に示すように、バスバー４０と電圧監視線５０は、端子部５１にて、接続手段としてのかしめ部１１０によって接続されている。かしめ部１１０は、バスバー４０における筐体２０に保持されている部分とは反対側の端部に設けられている。かしめ部１１０に電圧監視線５０の端子部５１を挿入して、かしめ部１１０をかしめることにより、バスバー４０と電圧監視線５０が接続されている。さらに、そのかしめ部１１０を含む接続部が、電池モジュール１０の正面１０ａ側において、筐体２０に固定されない。(5) Fifth Embodiment FIG. 6 is a plan view showing the outline of the connection structure of the bus bar and the voltage monitoring line in the battery module of the present embodiment. 6, the same components as those shown in FIG. 1 are designated by the same reference numerals and the description thereof will be omitted.
In the present embodiment, the bus bar 40 and the voltage monitoring line 50 are connected to the housing 20 at the terminal portion 51 of the voltage monitoring line 50 without being fixed. More specifically, as shown in FIG. 6, the bus bar 40 and the voltage monitoring line 50 are connected at a terminal portion 51 by a caulking portion 110 as a connecting means. The caulking portion 110 is provided at the end of the bus bar 40 opposite to the portion held by the housing 20. The bus bar 40 and the voltage monitoring line 50 are connected by inserting the terminal part 51 of the voltage monitoring line 50 into the caulking part 110 and caulking the caulking part 110. Further, the connecting portion including the crimp portion 110 is not fixed to the housing 20 on the front surface 10a side of the battery module 10.
本実施形態の電池モジュールによれば、第１の実施形態の電池モジュール１０と同様の効果が得られる。 According to the battery module of this embodiment, the same effect as that of the battery module 10 of the first embodiment can be obtained.
（６）第６の実施形態
図７は、本実施形態の電池モジュールにおける、バスバーと電圧監視線の接続構造の概略を示す平面図である。図７において、図１に示す構成と同一の構成については同一の符号を付して説明を省略する。
本実施形態では、バスバー４０と電圧監視線５０は、電圧監視線５０の端子部５１にて、筐体２０に対して固定されることなく、接続されている。より詳細には、図７に示すように、バスバー４０と電圧監視線５０は、一体化されることにより接続されている。バスバー４０と電圧監視線５０は、金属板の打ち抜き加工等により、一体に成型されている。さらに、バスバー４０と電圧監視線５０の境界部４５が、電池モジュール１０の正面１０ａ側において、筐体２０に固定されない。(6) Sixth Embodiment FIG. 7 is a plan view showing the outline of the connection structure of the bus bar and the voltage monitoring line in the battery module of the present embodiment. In FIG. 7, the same components as those shown in FIG. 1 are designated by the same reference numerals and the description thereof will be omitted.
In the present embodiment, the bus bar 40 and the voltage monitoring line 50 are connected to the housing 20 at the terminal portion 51 of the voltage monitoring line 50 without being fixed. More specifically, as shown in FIG. 7, the bus bar 40 and the voltage monitoring line 50 are connected by being integrated. The bus bar 40 and the voltage monitoring line 50 are integrally formed by punching a metal plate or the like. Further, the boundary portion 45 between the bus bar 40 and the voltage monitoring line 50 is not fixed to the housing 20 on the front surface 10a side of the battery module 10.
本実施形態の電池モジュールによれば、第１の実施形態の電池モジュール１０と同様の効果が得られる。 According to the battery module of this embodiment, the same effect as that of the battery module 10 of the first embodiment can be obtained.
［電池モジュールの製造方法］
上記の電池モジュールは、前記複数のバスバーと前記複数の電圧監視線の少なくとも１組を、前記電圧監視線の端子部にて、前記筐体に対して固定することなく、接続すること以外は公知の方法を用いて製造することができる。
この方法によれば、バスバーと電圧監視線を筐体に固定する必要が無いため、従来の方法と比較して簡便に電池モジュールを製造することが可能になるのみならず、上記した通り、振動が加えられても、バスバーが断線することを防止した電池モジュールを製造することができる。[Battery module manufacturing method]
The battery module described above is publicly known except that at least one set of the plurality of bus bars and the plurality of voltage monitoring lines is connected to the housing without being fixed at the terminal portion of the voltage monitoring line. It can be manufactured using the method of.
According to this method, since it is not necessary to fix the bus bar and the voltage monitoring line to the housing, it is possible to easily manufacture the battery module as compared with the conventional method, and as described above, the vibration It is possible to manufacture a battery module in which the bus bar is prevented from being disconnected even if the above is added.
１０ 電池モジュール
２０ 筐体
２１ 凹部
３０ 電池ユニット
３１ 電極タブ
３２ 蓄電体
３３ 外装体
３４ 電解質
３５ 正極部
３６ 負極部
３７ セパレータ
３８ 第１積層フィルム
３９ 第２積層フィルム
４０ バスバー
５０ 電圧監視線
５１ 端子部
６０ 溶接部
７０ リベット
８０ はんだ
９０ 溶接部
１００ ネジ
１１０ かしめ部DESCRIPTION OF SYMBOLS 10 Battery module 20 Housing 21 Recess 30 Battery unit 31 Electrode tab 32 Energy storage unit 33 Outer package 34 Electrolyte 35 Positive electrode part 36 Negative electrode part 37 Separator 38 First laminated film 39 Second laminated film 40 Busbar 50 Voltage monitoring wire 51 Terminal portion 60 Welded portion 70 Rivet 80 Solder 90 Welded portion 100 Screw 110 Crimped portion
Claims (4)
各バスバーは、前記電極タブ近傍にて前記筐体に保持され、
前記複数のバスバーと前記複数の電圧監視線の少なくとも１組は、前記電圧監視線の端子部にて、前記筐体に対して固定されることなく、接続されていることを特徴とする電池モジュール。A case, a plurality of battery units stacked and housed in the case, a plurality of bus bars welded to electrode tabs of the plurality of battery units, and a voltage of each of the plurality of battery units is measured. A plurality of voltage monitoring lines respectively connected to the measuring unit and the plurality of bus bars,
Each bus bar is held in the housing near the electrode tab,
At least one set of the plurality of bus bars and the plurality of voltage monitoring lines is connected to a terminal portion of the voltage monitoring line without being fixed to the housing. ..
各バスバーは、前記電極タブ近傍にて前記筐体に保持されている電池モジュールの製造方法であって、
前記複数のバスバーと前記複数の電圧監視線の少なくとも１組を、前記電圧監視線の端子部にて、前記筐体に対して固定することなく、接続することを含む電池モジュールの製造方法。A case, a plurality of battery units stacked and housed in the case, a plurality of bus bars welded to electrode tabs of the plurality of battery units, and a voltage of each of the plurality of battery units is measured. A plurality of voltage monitoring lines respectively connected to the measuring unit and the plurality of bus bars,
Each bus bar is a method of manufacturing a battery module held in the housing near the electrode tab,
A method of manufacturing a battery module, comprising: connecting at least one set of the plurality of bus bars and the plurality of voltage monitoring lines to a terminal portion of the voltage monitoring lines without fixing them to the housing.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
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| JP2017124903 | 2017-06-27 | ||
| JP2017124903 | 2017-06-27 | ||
| PCT/JP2018/024411 WO2019004296A1 (en) | 2017-06-27 | 2018-06-27 | Battery module and method for producing battery module |
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| EP4258457A4 (en) * | 2021-10-29 | 2024-03-20 | Contemporary Amperex Technology Co., Limited | Battery, electrical device, and method and device for manufacturing battery |
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| KR20200021450A (en) | 2020-02-28 |
| WO2019004296A1 (en) | 2019-01-03 |
| JP7150714B2 (en) | 2022-10-11 |
| CN110622340A (en) | 2019-12-27 |
| CN110622340B (en) | 2022-10-14 |
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