CN104412418A - 电池组 - Google Patents

电池组 Download PDF

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CN104412418A
CN104412418A CN201380013143.XA CN201380013143A CN104412418A CN 104412418 A CN104412418 A CN 104412418A CN 201380013143 A CN201380013143 A CN 201380013143A CN 104412418 A CN104412418 A CN 104412418A
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battery unit
bend
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lead
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CN104412418B (zh
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宋在宪
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LG Electronics Inc
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/05Accumulators with non-aqueous electrolyte
    • H01M10/052Li-accumulators
    • H01M10/0525Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50Current conducting connections for cells or batteries
    • H01M50/543Terminals
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10Primary casings, jackets or wrappings of a single cell or a single battery
    • H01M50/172Arrangements of electric connectors penetrating the casing
    • H01M50/174Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
    • H01M50/176Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for prismatic or rectangular cells
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/209Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/218Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material
    • H01M50/22Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material of the casings or racks
    • H01M50/222Inorganic material
    • H01M50/224Metals
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    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/233Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
    • H01M50/242Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries against vibrations, collision impact or swelling
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50Current conducting connections for cells or batteries
    • H01M50/502Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/507Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising an arrangement of two or more busbars within a container structure, e.g. busbar modules
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50Current conducting connections for cells or batteries
    • H01M50/502Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/521Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the material
    • H01M50/522Inorganic material
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50Current conducting connections for cells or batteries
    • H01M50/528Fixed electrical connections, i.e. not intended for disconnection
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50Current conducting connections for cells or batteries
    • H01M50/531Electrode connections inside a battery casing
    • HELECTRICITY
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    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50Current conducting connections for cells or batteries
    • H01M50/543Terminals
    • H01M50/547Terminals characterised by the disposition of the terminals on the cells
    • H01M50/548Terminals characterised by the disposition of the terminals on the cells on opposite sides of the cell
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50Current conducting connections for cells or batteries
    • H01M50/543Terminals
    • H01M50/552Terminals characterised by their shape
    • H01M50/553Terminals adapted for prismatic, pouch or rectangular cells
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00Batteries for particular applications
    • H01M2220/20Batteries in motive systems, e.g. vehicle, ship, plane
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Abstract

本发明的电池组具有多个电池单元,电池单元用于生成电流,并且连接有用于供给所生成的电流的引线,多个电池单元中的2个以上电池单元的引线焊接接合在一起,各引线分别在焊接接合的接合部与电池单元之间弯曲形成有冲击吸收部,从而具有能够使引线接合部因外部振动或冲击而受到的损伤达到最小,进而提高引线的耐久性的优点。

Description

电池组
技术领域
本发明涉及可用于电动汽车的电池组,特别涉及在电池单元上连接有引线的电池组。
背景技术
使用汽油、轻油等化石燃料的车辆的最大问题之一是引发大气污染。作为解决这种问题的方案,将可充放电的二次电池用作车辆的动力源的技术受到关注。随之,开发出了仅用电池就可行驶的电动汽车(EV)、并用电池和现有引擎的混合动力电动汽车(HEV)等,并且一部分已经商用化。作为EV、HEV等的动力源的二次电池,主要使用镍氢(Ni-MH)电池,但是最近也试图使用锂离子电池等。
作为EV、HEV等的动力源,要求高输出大容量,因此使用串联和/或并联连接了多个小型二次电池(单位电池或电池单元)的结构的电池组。
电池组可包括多个连接有引线的电池单元,电池单元的引线能够焊接接合。
发明内容
所要解决的技术课题
现有技术中的电池组存在在受到冲击或振动时引线的焊接部分受损的问题。
解决技术课题的手段
作为解决上述技术问题的方案,具有多个电池单元,所述电池单元用于生成电流,并且连接有用于供给所生成的电流的引线,上述多个电池单元中的2个以上电池单元的引线焊接接合在一起,各上述引线分别在焊接接合的接合部与上述电池单元之间弯曲形成有冲击吸收部。
多个上述引线的上述冲击吸收部向彼此相反的方向突出。
上述冲击吸收部至少被弯曲成2段以上。
上述冲击吸收部包括:将引线弯曲而形成的第一弯曲部,将引线与上述第一弯曲部对置地弯曲而形成的第二弯曲部,连接第一弯曲部和第二弯曲部的第三弯曲部。
上述第三弯曲部分别与上述第一弯曲部和第二弯曲部形成钝角。
上述第一弯曲部和第二弯曲部通过将上述引线倾斜弯曲而形成,上述第三弯曲部从上述第一弯曲部和第二弯曲部水平弯曲。
上述冲击吸收部在内侧具有缓冲空间。
在上述多个电池单元中位于上侧的电池单元的引线上形成的冲击吸收部向上突出,在上述多个电池单元中位于下侧的电池单元的引线上形成的冲击吸收部向下突出。
上述冲击吸收部的高度在上述电池单元厚度的1/10~1/2。
发明效果
本发明具有能够使引线接合部因外部振动或冲击而受到的损伤达到最小,从而提高引线的耐久性的优点。
附图说明
图1是本发明的电池组的一实施例的分解立体图。
图2是本发明的电池组的一实施例的概略侧视图。
具体实施方式
图1是本发明的电池组的一实施例的分解立体图,图2是本发明的电池组的一实施例的概略侧视图。
本发明的一实施例的电池组包括:电池单元2、4、6、8,以及用于保护电池单元2、4、6、8的壳体(cartridge)10。
电池单元2、4、6、8生成电流,可由锂离子(Li-ion)电池构成。
可在壳体10上水平设置多个电池单元2、4、6、8。
壳体10可包括:中心壳体12,上侧内部壳体14,下侧内部壳体16,上侧盖18,以及下侧盖20。
多个电池单元2、4、6、8可设在中心壳体12上。就多个电池单元2、4、6、8中最上侧电池单元2的上表面而言,其周缘可贴紧在上侧内部壳体14上,其中心部分可贴紧在上侧盖18上。就多个电池单元2、4、6、8中最下侧电池单元8的下表面而言,其周缘可贴紧在下侧内部壳体16上,中心部分贴紧在下侧盖20上。
在中心壳体12上可设置有撑档(spacer)22,该撑档22支持上侧内部壳体14、上侧盖18、下侧内部壳体16和下侧盖20,并且在层叠多个电池组进行结合时能够使长螺栓贯通。
在中心壳体12的前面能够结合前盖24,而且在中心壳体12的后面能够结合后盖26。
上侧盖18和下侧盖20优选散热性能优良的铝材。
在多个电池单元2、4、6、8的各单元上可连接用于供给所生成的电流的引线32、33、34、35、36、37、38、39。引线32、33、34、35、36、37、38、39可包括:连接到电池单元2、4、6、8的一侧的阳极引线32、34、36、38,以及连接到电池单元2、4、6、8的另一侧的阴极引线33、35、37、39。具体而言,引线32、33、34、35、36、37、38、39可包括:连接到电池单元2的一侧的阳极引线32以及连接到另一侧的阴极引线33,连接到电池单元4的一侧的阳极引线34以及连接到另一侧的阴极引线35,连接到电池单元6的一侧的阳极引线36以及连接到另一侧的阴极引线37,连接到电池单元8的一侧的阳极引线38以及连接到另一侧的阴极引线39。
多个电池单元2、4、6、8中2个以上电池单元的引线可焊接接合在一起。
多个电池单元2、4、6、8可由第一、第二、第三、第四电池单元2、4、6、8构成。
就多个电池单元2、4、6、8而言,可以将多个单元连接成一组,也可以将2个电池单元连接成一组,或者将3个单元连接成一组,或者将4个单元连接成一组。
当将多个电池单元2、4、6、8以2个为一组连接时,可焊接接合2个电池单元的引线。第一电池单元2和第二电池单元4可并联连接,第三电池单元6和第四电池单元8可并联连接。第一电池单元2和第二电池单元4构成的组与第三电池单元6和第四电池单元8构成的组可串联连接。
在多个电池单元2、4、6、8中,阳极引线32、36和阳极引线34、38可焊接接合,所述阳极引线32、36与2个电池单元中位于上侧的电池单元2、6连接,所述阳极引线34、38与2个电池单元中位于下侧的电池单元4、8连接。具体而言,阳极引线32和阳极引线34焊接接合,阳极引线36和阳极引线38焊接接合。所述阳极引线32是与电池单元2、4中位于上侧的电池单元2连接的阳极引线,所述阳极引线36是与电池单元6、8中位于上侧的电池单元6连接的阳极引线,所述阳极引线34是与电池单元2、4中位于下侧的电池单元4连接的阳极引线,所述阳极引线38是与电池单元6、8中位于下侧的电池单元8连接的阳极引线。
此外,在多个电池单元2、4、6、8中,阴极引线33、37和阴极引线35、39可焊接接合,所述阴极引线33、37与2个电池单元中位于上侧的电池单元2、6连接,所述阴极引线35、39与2个电池单元中位于下侧的电池单元4、8连接。具体而言,阴极引线33和阴极引线35可焊接接合,阴极引线37和阴极引线39可焊接接合。所述阴极引线33是与电池单元2、4中位于上侧的电池单元2连接的阴极引线,所述阴极引线37是与电池单元6、8中位于上侧的电池单元6连接的阴极引线,所述阴极引线35是与电池单元2、4中位于下侧的电池单元4连接的阴极引线,所述阴极引线39是与电池单元6、8中位于下侧的电池单元8连接的阴极引线。
引线32、33、34、35、36、37、38、39的各引线,可在焊接接合接合部50和电池单元2、4、6、8之间弯曲形成有冲击吸收部60。具体而言,引线32在焊接接合接合部50和电池单元2之间,引线33在焊接接合接合部50和电池单元2之间,引线34在焊接接合接合部50和电池单元4之间,引线35在焊接接合接合部50和电池单元4之间,引线36在焊接接合接合部50和电池单元6之间,引线37在焊接接合接合部50和电池单元6之间,引线38在焊接接合接合部50和电池单元8之间,引线39在焊接接合接合部50和电池单元8之间,弯曲形成有冲击吸收部60。
多个引线32、33、34、35、36、37、38、39的冲击吸收部60可向彼此相反的方向突出。
在引线32、33、34、35、36、37、38、39中,在2个电池单元中位于上侧的引线32、33、36、37上形成的冲击吸收部60可向上突出,在2个电池单元中位于下侧的引线34、35、38、39上形成的冲击吸收部60可向下突出。具体而言,在电池单元2、4中位于上侧的电池单元2上的引线32、33以及在电池单元6、8中位于上侧的电池单元6上的引线36、37上形成的各冲击吸收部60可向上突出。在电池单元2、4中位于下侧的电池单元4上的引线34、35以及在电池单元6、8中位于下侧的电池单元8上的引线38、39上形成的各冲击吸收部60可向下突出。
在引线32、33、34、35、36、37、38、39中,形成在位于2个电池单元中上侧的引线32、33、36、37上的冲击吸收部60可向下突出,形成在位于2个电池单元中下侧的引线34、35、38、39上的冲击吸收部60可向上突出。具体而言,在电池单元2、4中位于上侧的电池单元2上的引线32、33以及在电池单元6、8中位于上侧的电池单元6上的引线36、37上形成的各冲击吸收部60可向下突出。在电池单元2、4中位于下侧的电池单元4上的引线34、35以及在电池单元6、8中位于下侧的电池单元8上的引线38、39上形成的各冲击吸收部60可向上突出。
冲击吸收部60在受到冲击或振动时可产生弹性变形,同时还可吸收冲击或振动,并且被至少弯曲成2段以上。
冲击吸收部60可包括:将引线32、33、34、35、36、37、38、39弯曲而形成的第一弯曲部62;将引线32、33、34、35、36、37、38、39与第一弯曲部62对置地弯曲而形成的第二弯曲部64;连接第一弯曲部62和第二弯曲部64的第三弯曲部66。第一弯曲部62和第二弯曲部64可通过将引线倾斜弯曲而形成。冲击吸收部60可在内侧具有缓冲空间S。第三弯曲部66可分别与第一弯曲部62及第二弯曲部66形成钝角。第三弯曲部66可从第一弯曲部62及第二弯曲部64水平弯曲。
若冲击吸收部60的高度过高,则可能与上侧盖18或下侧盖20产生干涉,因此优选冲击吸收部60的高度在电池单元厚度的1/2以下。冲击吸收部60的高度过低时,可能降低冲击吸收能力,导致在受到外部冲击时,第一弯曲部62或第三弯曲部66无法向缓冲空间S变形,因此优选冲击吸收部60的高度在电池单元厚度的1/10以上。
冲击吸收部60的高度优选在电池单元厚度的1/10~1/2。
电池组可包括端子72、74、76,端子72、74、76与引线32、33、34、35、36、37、38、39接触,从而得到经由引线32、33、34、35、36、37、38、39供给的电流。
端子72、74、76通过高压电缆与由电池组供电的马达等外部设备连接,端子72、74、76可由铜材质的母线(bus bar)形成。
端子72、74、76还可包括阳极端子72、阴极端子74和串联端子86。
阳极端子72可以连接到阳极引线32、34、36、38中的一个上。阴极端子74可以连接到阴极引线33、35、37、39中的一个上。串联电极端子76可以连接到阳极引线32、34、36、38中的另一个和阴极引线33、35、37、39中的另一个上。
下面,对如上构成的本发明的作用进行说明。
首先,当电池组受到冲击或振动时,电池单元2、4、6、8因冲击而向一方向受到挤压或振动。
在电池单元2、4、6、8受到挤压或振动时,冲击或振动会波及到引线32、33、34、35、36、37、38、39,但是通过引线32、33、34、35、36、37、38、39传递来的冲击或振动被冲击吸收部60吸收,因此焊接部50受到的冲击或振动达到最小。
冲击吸收部60,能够通过使第一弯曲部62、第二弯曲部64、第三弯曲部66中的至少一个产生弹性弯曲来吸收冲击或振动。冲击吸收部60的第一弯曲部62和第二弯曲部64可被挤向由冲击吸收部60形成的空间S,由此冲击吸收部60能够缓冲受到的冲击,并且在没有冲击或振动时能够恢复成原来形状。

Claims (9)

1.一种电池组,
具有多个电池单元,上述电池单元用于生成电流,并且连接有用于供给所生成的电流的引线,
上述多个电池单元中的2个以上电池单元的引线焊接接合在一起,
各上述引线分别在焊接接合的接合部与上述电池单元之间弯曲形成有冲击吸收部。
2.根据权利要求1所述的电池组,多个上述引线的上述冲击吸收部向彼此相反的方向突出。
3.根据权利要求1所述的电池组,上述冲击吸收部至少被弯曲成2段以上。
4.根据权利要求1所述的电池组,上述冲击吸收部包括:将引线弯曲而形成的第一弯曲部,将引线与上述第一弯曲部对置地弯曲而形成的第二弯曲部,连接第一弯曲部和第二弯曲部的第三弯曲部。
5.根据权利要求4所述的电池组,上述第三弯曲部分别与上述第一弯曲部和第二弯曲部形成钝角。
6.根据权利要求5所述的电池组,上述第一弯曲部和第二弯曲部通过将上述引线倾斜弯曲而形成,上述第三弯曲部从上述第一弯曲部和第二弯曲部水平弯曲。
7.根据权利要求1所述的电池组,上述冲击吸收部在内侧具有缓冲空间。
8.根据权利要求1所述的电池组,在上述多个电池单元中位于上侧的电池单元的引线上形成的冲击吸收部向上突出,在上述多个电池单元中位于下侧的电池单元的引线上形成的冲击吸收部向下突出。
9.根据权利要求1所述的电池组,上述冲击吸收部的高度在上述电池单元厚度的1/10~1/2。
CN201380013143.XA 2012-03-06 2013-03-05 电池组 Active CN104412418B (zh)

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