WO2012153632A1 - Battery pack - Google Patents

Battery pack Download PDF

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Publication number
WO2012153632A1
WO2012153632A1 PCT/JP2012/061007 JP2012061007W WO2012153632A1 WO 2012153632 A1 WO2012153632 A1 WO 2012153632A1 JP 2012061007 W JP2012061007 W JP 2012061007W WO 2012153632 A1 WO2012153632 A1 WO 2012153632A1
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WO
WIPO (PCT)
Prior art keywords
unit cell
battery pack
cell groups
circuit board
holder
Prior art date
Application number
PCT/JP2012/061007
Other languages
French (fr)
Japanese (ja)
Inventor
米田　晴彦
孝夫 高津
中野　雅也
Original Assignee
三洋電機株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 三洋電機株式会社 filed Critical 三洋電機株式会社
Publication of WO2012153632A1 publication Critical patent/WO2012153632A1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—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
    • H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
    • 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 more particularly to a battery pack in which a plurality of unit cells and a circuit board are housed in an outer case.
  • Battery packs are widely used as power sources for mobile devices such as cellular phones, electric assist bicycles, electric motorcycles, and electric vehicles (PEV, HEV).
  • the configuration of the battery pack according to the prior art will be described with reference to FIGS.
  • the battery pack according to one prior art has a configuration in which a core pack 90 is housed in an exterior composed of an upper case 91 and a lower case 92.
  • the core pack 90 includes 12 unit cells 901a to 901l and a circuit board 902.
  • An external connector 9021 is mounted on the circuit board 902 so as to be exposed from windows provided in the upper case 91 and the lower case 92.
  • the twelve unit cells 901a to 901l and these and the circuit board 902 are connected by lead plates 903a to 903f and the like.
  • the core pack 90 having such a configuration is formed in advance before being stored in the upper case 91 and the lower case 92.
  • the lead plate 903a is arranged in consideration of the arrangement of the twelve unit cells 901a to 901l and the arrangement of these and the circuit board 902 so that they can be accommodated in the exterior constituted by the upper case 91 and the lower case 92. It is necessary to perform connection of ⁇ 903f. Therefore, complicated work is required when manufacturing the battery pack.
  • the battery pack according to another prior art shown in FIG. 8 has a configuration that can slightly eliminate the troublesome work during manufacturing as described above.
  • a plurality of unit cell groups 95 are housed in an exterior composed of an upper case 93 and a lower case 94, and a circuit board 99 is provided. Is placed above the upper case 93.
  • each unit cell group 95 is formed by joining four cylindrical unit cells 951a to 951d with two lead plates 952a and 952b. Each unit cell group 95 and the circuit board 99 are connected via lead plates 991a to 991d. As described above, in the prior art shown in FIG. 8, the unit cell group 95 is formed in advance, thereby reducing the complexity of the work in manufacturing the battery pack.
  • the battery pack according to the prior art shown in FIG. 7 and FIG. 8 involves complicated work in the production thereof, which causes a problem when the production cost is further reduced. Further, in the battery pack according to the above-described prior art, when the battery pack is dropped or the like, an impact force is also applied to the unit cell housed therein, which may cause damage.
  • the present invention has been made in view of the problems as described above, and provides a battery pack that is low in manufacturing cost and has high impact resistance and high vibration resistance by being excellent in workability at the time of manufacture. The purpose is to do.
  • the battery pack according to the present invention includes an outer case, a plurality of unit cells stored in the inner space of the outer case, and an inner space of the outer case, and is connected to the positive and negative terminals of the plurality of unit cells.
  • the plurality of unit cells are grouped into a plurality of unit cell groups having the same configuration, and each of the plurality of unit cell groups includes the one or more unit cells and the one or more unit cells. And a holder for holding the unit cell.
  • the battery pack according to the present invention is characterized in that a plurality of unit cell groups are arranged side by side in a state of being positioned with respect to each other by engagement between holders of adjacent unit cell groups.
  • a plurality of unit cell groups are arranged side by side in a state of being positioned by engagement between holders of adjacent unit cell groups.
  • the workability at the time of manufacture is high, and the manufacturing cost can be reduced.
  • the unit cell group can be formed in advance, and the efficiency in manufacturing can be improved. Therefore, in the battery pack according to the present invention, the work efficiency related to the production is high, and the production cost can be reduced.
  • the battery pack according to the present invention in each unit cell group, the unit cells belonging to the group are held by the holder and are stored in the outer case in that state. For this reason, the battery pack according to the present invention has higher impact resistance and vibration resistance than the battery pack according to the above-described prior art, as much as the unit cell is held by the holder. Therefore, the battery pack according to the present invention is excellent in workability at the time of manufacture, so that the manufacturing cost is low, and the battery pack has high impact resistance and high vibration resistance.
  • the following variation configurations may be employed.
  • the engagement between the holders between adjacent unit cell groups is specifically determined by the engagement protrusion provided on one side being engaged with the engagement hole provided on the other side. It can be set as the structure made by inserting closely. By adopting such a configuration, the engagement between the holders of the adjacent cell groups can be reliably achieved with a simple configuration, and the cell groups can be reliably positioned within the exterior.
  • a plurality of engagement protrusions and engagement holes can be provided in the holders of each of the plurality of unit cell groups. If a plurality of engagement protrusions and engagement holes are provided in this way, the engagement between the cell groups becomes stronger, which is effective in obtaining high positional accuracy.
  • the holder in the configuration described above, has a plate-shaped main body portion, and when the one or more unit cells are placed on the main body portion, a surrounding portion surrounds the periphery.
  • One of the engagement protrusion and the engagement hole is provided on the outer surface of the surrounding portion on one side in the juxtaposition direction of the plurality of unit cell groups, and the other of the surrounding portion on the side opposite to the one side It can be set as the structure provided in the outer surface. With such a configuration, the unit cell groups are connected in series, and it is possible to increase the working efficiency during manufacturing.
  • the unit cell in the above configuration, is not placed on a part of the main surface of the main body portion of each holder of the plurality of unit cell groups, and there is a released region, In the state where the unit cell groups are arranged side by side, the released regions of the holders in the plurality of unit cell groups are connected to each other. And it can be set as the structure that at least one part of a circuit board is mounted in the part in which the said open
  • a lead plate provided for connection to the circuit board is projected from each of the plurality of unit cell groups toward the released region of the holder in the unit cell group.
  • a plurality of the plurality of unit cell groups are arranged on the edge portion along the edge of the center side of the unit cell group in the portion placed on the portion where the released regions of the holder are connected to each other.
  • a configuration in which conductive lands are provided corresponding to the lead plates can be employed.
  • a heat sensitive element may be provided so as to project from the circuit board to the outer surface of the unit cell belonging to the plurality of unit cell groups.
  • the plurality of unit cells can be configured such that each has a flat rectangular external shape and the same external size.
  • the external shape of the unit cell is not limited to this.
  • FIG. 2 is a schematic perspective view showing an internal configuration of the battery pack 1.
  • FIG. 2 is a schematic perspective view showing an external configuration of a core pack 10.
  • FIG. 1 is a schematic developed perspective view showing a schematic configuration of a core pack 10.
  • 2 is a schematic exploded perspective view showing a configuration of one unit cell group 101.
  • FIG. 3 is a schematic perspective view showing a configuration of a holder 1014 in a unit cell group 101.
  • the battery pack 1 includes an outer case configured by abutting the openings of an upper case 11 and a lower case 12 that are both flat and shallow.
  • a window portion 11a is partially opened on the front side in the Y-axis direction of the upper case 11, and the external connection terminal 1031 is exposed from the inside.
  • a translucent protective label 15 is attached to a part of the upper surface of the upper case 11 in the Z-axis direction.
  • the internal configuration of the battery pack 1 will be described with reference to FIG. 2, in the battery pack 1, the core pack 10 is accommodated in the internal space of the outer case constituted by the upper case 11 and the lower case 12. The core pack 10 is attached to the inner bottom surface of the lower case 12 by a double-sided adhesive seal 13.
  • a window portion 11b for an indicator is opened on the upper surface in the Z-axis direction of the upper case 11, and the protective label 15 is adhered as described above.
  • a bottom label 14 is attached to the outer bottom surface of the lower case 12.
  • the core pack 10 of the battery pack 1 includes two unit cell groups 101 and 102 and one circuit board 103.
  • the unit cell group 101 and the unit cell group 102 are positioned in the X-axis direction by being engaged with each other, and are juxtaposed in this state. All of the circuit board 103 is placed and bonded above a part of each of the unit cell groups 101 and 102.
  • the external connection terminal 1031 is an end portion of the core pack 10 on the front side in the Y-axis direction, and is mounted on the upper side in the Z-axis direction.
  • each unit cell group 101 and the unit cell group 102 have the same configuration and external shape.
  • a part of the outer surface of each unit cell group 101, 102 has a release area (area A 1, A 2) that is a placement area of the circuit board 103.
  • Each of the unit cell groups 101 and 102 has lead plates 1015a to 1015d and 1025a to 1025d projecting toward the regions A1 and A2.
  • conductive lands 1032 a to 1032 h are provided at the edge on the negative side in the Y-axis direction of the board body 1030 corresponding to the lead plates 1015 a to 1015 d and 1025 a to 1025 d of the unit cell groups 101 and 102. ing.
  • the circuit board 103 is provided with thermistor elements 1033a and 1033b that project in the Y-axis direction toward the unit cell groups 101 and 102, respectively.
  • the thermistor elements 1033a and 1033b are in contact with the outer surface of one unit cell in the unit cell groups 101 and 102, respectively, and are attached to the outer surface of the unit cell with a protective label 104, respectively. 4).
  • Configuration of unit cell groups 101 and 102 The configuration of unit cell groups 101 and 102 will be described with reference to FIG. In FIG. 5, only one unit cell group 101 is illustrated, but the unit cell group 102 has the same configuration.
  • the unit cell group 101 includes three unit cells 1011, 1012, and 1013, a holder 1014 that holds them, and further unit cells 1011, 1012, and 1013, and these and the circuit board 103.
  • Lead plates 1015a to 1015d to be connected are provided.
  • Each of the unit cells 1011, 1012, and 1013 is a lithium ion battery having a flat rectangular external shape.
  • Negative electrode terminals 1011 a, 1012 a, and 1013 a are formed on one end surface, and the remaining outer surfaces are formed on the positive electrodes 1011 b, 1012 b, and 1013 b. Equivalent to.
  • PTC elements 1017b, 1017c, and 1017d are inserted in the lead plates 1015b, 1015c, and 1015d, respectively. Further, an insulating sheet 1016 is interposed between a part of the outer peripheral surface of the unit cell 1011 and the lead plate 1015d in order to insulate each other.
  • the three unit cells 1011, 1012, and 1013 are connected in series by lead plates 1015 b and 1015 c. These lead plates 1015b and 1015c are also connected to the circuit board 103, and these are for detecting each intermediate voltage value.
  • FIG. 6 The configuration of the holder in each unit cell group 101, 102 will be described with reference to FIG. In FIG. 6, the holder 1014 in the unit cell group 101 is illustrated, but the holder in the unit cell group 102 also has the same configuration.
  • FIG. 6A and FIG. 6B are in a relationship showing a state of being rotated 180 ° with the Y axis as the central axis.
  • the holder 1014 is based on a plate-like portion configured along the XY plane, and each of the cells 1011, 1012, and 1013 is accommodated therein.
  • Enclosed portions 1014d, 1014e, 1014f, 1014g, 1014h, and 1014i provided so as to surround the portions 1014a, 1014b, and 1014c are integrally formed.
  • the unit cells 1011, 1012, and 1013 are based on a part of each outer peripheral surface in a state of being accommodated in the portions 1014 a, 1014 b, and 1014 c surrounded by the surrounding portions 1014 d, 1014 e, 1014 f, 1014 g, 1014 h, and 1014 i. It contacts the plate-like part.
  • three engagement holes 1014j are provided on the outer surface of one end of the holder 1014 in the X-axis direction.
  • three engagement protrusions 1014k are provided on the outer surface of the other end of the holder 1014 in the X-axis direction.
  • the engagement holes 1014j and the engagement protrusions 1014k are provided corresponding to each other, and are configured to engage with each other between the holders 1014 of the adjacent unit cell groups 101 and 102.
  • the two unit cell groups 101 and 102 are engaged by the close insertion of the engaging protrusions 1014k into the engaging holes 1014j between the holders 1014, thereby positioning each other. Are arranged side by side. Therefore, the battery pack according to the prior art shown in FIG. 7 and FIG. 8 has high workability at the time of manufacturing, and can reduce the manufacturing cost.
  • the unit cell groups 101 and 102 can be formed in advance.
  • the work efficiency at the time can be improved. Therefore, in the battery pack 1, the work efficiency concerning manufacture is high and it can aim at reduction of manufacturing cost.
  • the unit cells 1011, 1012, 1013 and so on belonging to the groups 101 and 102 are held by the holder 1014, It is housed in an outer case composed of an upper case 11 and a lower case 12. For this reason, the battery pack 1 has higher impact resistance and vibration resistance than the battery pack according to the above-described prior art, as much as the unit cells 1011, 1012, 1013,.
  • the battery pack 1 according to the present embodiment is excellent in workability at the time of manufacture, so that the manufacturing cost is low, and it has high impact resistance and high vibration resistance.
  • the holder 1014 is provided with three engagement holes 1014j and three engagement protrusions 1014k, and 3 between the unit cell group 101 and the unit cell group 102. The locations are engaged. For this reason, compared with the case where the engagement between the holders is performed by one engagement hole and one engagement projection, the strength of the engagement is increased, and the unit cell groups are connected to each other when the circuit board is assembled. Can be prevented from rotating with respect to each other. Therefore, it is effective in obtaining high positional accuracy, and also effective from the viewpoint of work efficiency during manufacturing.
  • the unit cells 1011, 1012, 1013, and the like are formed on a part of the main surface of the main body portion of the holder 1014 of each of the two unit cell groups 101 and 102. .. Are not placed, there are released areas (areas A1 and A2 in FIG. 4), and in a state where two unit cell groups 101 and 102 are juxtaposed, the area A1 and the area A2 are connected to each other. Become. And it is mounted above the area
  • the circuit board 103 in the core pack 10 may be accurately positioned with respect to the two unit cell groups 101 and 102 before being housed in the outer case. it can. Therefore, it is possible to increase work efficiency.
  • lead plates 1015a to 1015d and 1025a to 1025d are projected from the two unit cell groups 101 and 102, and the conductive land 1032a is formed at a corresponding portion of one end edge of the circuit board 103. ⁇ 1032h are provided, and in the core pack 10, these are connected. Therefore, there is an effect in improving the efficiency of manufacturing the battery pack 1.
  • the configuration includes the two unit cell groups 101 and 102, but the configuration may include three or more unit cell groups.
  • the direction in which the plurality of unit cell groups are arranged side by side is not limited to the X-axis direction, and may be the Y-axis direction or the Z-axis direction. In this case, the same effects as described above can be obtained by appropriately changing the positions of the engaging protrusions and the engaging holes, and the same applies to the protruding direction of the lead plate.
  • each unit cell group 101 and 102 includes three unit cells 1011, 1012 and 1013 in the configuration, but the number of unit cells in each unit cell group is limited to this. Is not to be done. For example, it can be one or two, or four or more.
  • a flat rectangular lithium ion battery is used, but this is not limited.
  • a cylindrical shape or a metal laminate outer battery may be employed.
  • alkaline batteries such as a nickel cadmium battery and a nickel metal hydride battery, can also be adopted as the battery type.
  • the constituent materials of the holders 1014 in the unit cell groups 101 and 102 are not particularly mentioned, but for example, an insulating resin material or the like is suitable.
  • the constituent material of the holder is not limited to this, and for example, a metal material whose surface is insulated can be used.
  • the present invention is useful for forming a battery pack with low manufacturing cost and high impact resistance and vibration resistance.
  • Battery pack 10. Core pack 11. Upper case 12. Lower case 13. Double-sided adhesive seal 14. Bottom label 15,104.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

[Problem] To provide a battery pack which reduces manufacturing costs by having excellent operability during manufacture, and which has high impact resistance and high vibration resistance. [Solution] A battery pack houses a core pack (10) in the internal space of an outer case. The core pack (10) is configured having two unit cell groups (101, 102) and a circuit substrate (103) as the main elements. The unit cell groups (101, 102) are each configured to have both three unit cells and holders holding the same. In the battery pack, the two unit cell groups (101, 102) are positioned through engagement of engaging holes and engaging protrusions formed on a lateral surface portion of the holders, and are arranged side by side in that state. Further, a part of the circuit substrate (103) is mounted on holder regions (A1, A2) which have been freed.

Description

電池パックBattery pack
　本発明は、電池パックに関し、特に複数の素電池と回路基板とが外装ケース内に収納されてなる電池パックに関する。 The present invention relates to a battery pack, and more particularly to a battery pack in which a plurality of unit cells and a circuit board are housed in an outer case.
　携帯電話機などのモバイル機器、あるいは、電動アシスト自転車や電動バイク、さらには電気自動車（ＰＥＶ、ＨＥＶ）などの電源として電池パックが広く用いられている。従来技術に係る電池パックの構成について、図７および図８を用い説明する。
　先ず、図７に示すように、一の従来技術に係る電池パックは、上ケース９１と下ケース９２とで構成される外装内に、コアパック９０が収納された構成を有する。コアパック９０は、１２個の素電池９０１ａ～９０１ｌと、回路基板９０２とで構成されている。回路基板９０２には、外部コネクタ９０２１が実装されており、上ケース９１および下ケース９２に設けられた窓部から露出するようになっている。 Battery packs are widely used as power sources for mobile devices such as cellular phones, electric assist bicycles, electric motorcycles, and electric vehicles (PEV, HEV). The configuration of the battery pack according to the prior art will be described with reference to FIGS.
First, as shown in FIG. 7, the battery pack according to one prior art has a configuration in which a core pack 90 is housed in an exterior composed of an upper case 91 and a lower case 92. The core pack 90 includes 12 unit cells 901a to 901l and a circuit board 902. An external connector 9021 is mounted on the circuit board 902 so as to be exposed from windows provided in the upper case 91 and the lower case 92.
　１２個の素電池９０１ａ～９０１ｌ、およびこれらと回路基板９０２とは、リード板９０３ａ～９０３ｆなどにより接続されている。このような構成のコアパック９０は、上ケース９１および下ケース９２へ収納する前に、予め形成される。このため、上ケース９１および下ケース９２で構成される外装内に収納できるように、１２個の素電池９０１ａ～９０１ｌの配置や、これらと回路基板９０２の配置などに配慮しながら、リード板９０３ａ～９０３ｆの接続を行う必要がある。よって、電池パックの製造に際して、煩雑な作業が必要となる。 The twelve unit cells 901a to 901l and these and the circuit board 902 are connected by lead plates 903a to 903f and the like. The core pack 90 having such a configuration is formed in advance before being stored in the upper case 91 and the lower case 92. For this reason, the lead plate 903a is arranged in consideration of the arrangement of the twelve unit cells 901a to 901l and the arrangement of these and the circuit board 902 so that they can be accommodated in the exterior constituted by the upper case 91 and the lower case 92. It is necessary to perform connection of ˜903f. Therefore, complicated work is required when manufacturing the battery pack.
　次に、図８に示す別の従来技術に係る電池パックは、上述のような製造時における煩雑な作業を少し解消できる構成となっている。具体的には、図８に示すように、この従来技術に係る電池パックでは、上ケース９３と下ケース９４とで構成される外装内に、複数の素電池グループ９５を収納し、回路基板９９を上ケース９３の上方に載置した構成となっている。 Next, the battery pack according to another prior art shown in FIG. 8 has a configuration that can slightly eliminate the troublesome work during manufacturing as described above. Specifically, as shown in FIG. 8, in the battery pack according to this prior art, a plurality of unit cell groups 95 are housed in an exterior composed of an upper case 93 and a lower case 94, and a circuit board 99 is provided. Is placed above the upper case 93.
　図８に示すように、各素電池グループ９５は、４本の円筒形素電池９５１ａ～９５１ｄが２枚のリード板９５２ａ，９５２ｂで接合されてなる。そして、各素電池グループ９５と回路基板９９とは、リード板９９１ａ～９９１ｄを介して接続されている。このように図８に示す従来技術では、予め素電池グループ９５を形成しておくことにより、電池パックの製造に際しての作業の煩雑さを少しでも低減しようとされている。 As shown in FIG. 8, each unit cell group 95 is formed by joining four cylindrical unit cells 951a to 951d with two lead plates 952a and 952b. Each unit cell group 95 and the circuit board 99 are connected via lead plates 991a to 991d. As described above, in the prior art shown in FIG. 8, the unit cell group 95 is formed in advance, thereby reducing the complexity of the work in manufacturing the battery pack.
特開２０１１－００３６２９号公報JP 2011-003629 A 特開２００５－３１７４６０号公報JP 2005-317460 A 特開２００８－０３４２９６号公報JP 2008-034296 A
　しかしながら、図７および図８に示す従来技術に係る電池パックでは、その製造に際して煩雑な作業を伴い、製造コストの低減を一段と進める際に問題となる。また、上記従来技術に係る電池パックでは、落下時などに、内部に収納された素電池にも衝撃力が加わり破損のおそれがある。
　本発明は、上記のような問題に鑑みてなされたものであって、製造時における作業性に優れることで製造コストが安く、且つ、高い耐衝撃性および高い耐振動性を有する電池パックを提供することを目的とする。 However, the battery pack according to the prior art shown in FIG. 7 and FIG. 8 involves complicated work in the production thereof, which causes a problem when the production cost is further reduced. Further, in the battery pack according to the above-described prior art, when the battery pack is dropped or the like, an impact force is also applied to the unit cell housed therein, which may cause damage.
The present invention has been made in view of the problems as described above, and provides a battery pack that is low in manufacturing cost and has high impact resistance and high vibration resistance by being excellent in workability at the time of manufacture. The purpose is to do.
　そこで、本発明に係る電池パックは、　外装ケースと、外装ケースの内部空間に収納された複数の素電池と、外装ケースの内部空間に収納され、複数の素電池の各正負極端子に接続された回路基板とを備え、複数の素電池が、互いに同一構成の複数の素電池グループにグループ分けされ、複数の素電池群の各々が、前記１または複数の素電池と、当該１または複数の素電池を保持するホルダーとを有する。そして、本発明に係る電池パックでは、複数の素電池グループが、隣接する素電池グループのホルダー同士での係合により互いに位置決めされた状態で、並設されている、ことを特徴とする。 Therefore, the battery pack according to the present invention includes an outer case, a plurality of unit cells stored in the inner space of the outer case, and an inner space of the outer case, and is connected to the positive and negative terminals of the plurality of unit cells. The plurality of unit cells are grouped into a plurality of unit cell groups having the same configuration, and each of the plurality of unit cell groups includes the one or more unit cells and the one or more unit cells. And a holder for holding the unit cell. The battery pack according to the present invention is characterized in that a plurality of unit cell groups are arranged side by side in a state of being positioned with respect to each other by engagement between holders of adjacent unit cell groups.
　本発明に係る電池パックでは、複数の素電池グループが、隣接する素電池グループのホルダー同士の間での係合により位置決めされた状態で並設されているので、図７および図８に示す従来技術に係る電池パックに対し、製造時における作業性が高く、製造コストの低減を図ることが可能となる。
　また、本発明に係る電池パックでは、複数の素電池グループが互いに同一構成であるので、予め素電池グループを形成しておくことができ、製造に係る効率化を図ることができる。よって、本発明に係る電池パックでは、製造に係る作業効率が高く、製造コストの低減を図ることができる。 In the battery pack according to the present invention, a plurality of unit cell groups are arranged side by side in a state of being positioned by engagement between holders of adjacent unit cell groups. With respect to the battery pack according to the technology, the workability at the time of manufacture is high, and the manufacturing cost can be reduced.
Further, in the battery pack according to the present invention, since the plurality of unit cell groups have the same configuration, the unit cell group can be formed in advance, and the efficiency in manufacturing can be improved. Therefore, in the battery pack according to the present invention, the work efficiency related to the production is high, and the production cost can be reduced.
　また、本発明に係る電池パックでは、各素電池グループにおいて、当該グループに属する素電池がホルダーに保持されており、その状態で外装ケースに収納されている。このため、本発明に係る電池パックは、上記従来技術に係る電池パックよりも、素電池がホルダーに保持されている分だけ、耐衝撃性および耐振動性が高い。
　従って、本発明に係る電池パックは、製造時における作業性に優れることで製造コストが安く、且つ、高い耐衝撃性および高い耐振動性を有する。 Further, in the battery pack according to the present invention, in each unit cell group, the unit cells belonging to the group are held by the holder and are stored in the outer case in that state. For this reason, the battery pack according to the present invention has higher impact resistance and vibration resistance than the battery pack according to the above-described prior art, as much as the unit cell is held by the holder.
Therefore, the battery pack according to the present invention is excellent in workability at the time of manufacture, so that the manufacturing cost is low, and the battery pack has high impact resistance and high vibration resistance.
　本発明に係る電池パックでは、次のようなバリエーション構成を採用することもできる。
　本発明に係る電池パックでは、上記構成において、隣接する素電池グループ間におけるホルダー同士の係合が、具体的に、一方に設けられた係合突起が、他方に設けられた係合穴に対して密に挿入されることによりなされているという構成とすることができる。このような構成とすることにより、簡易な構成で、確実に隣接する素電池グループのホルダー同士の間の係合が実現され、外装内における素電池グループの確実な位置決めが可能となる。 In the battery pack according to the present invention, the following variation configurations may be employed.
In the battery pack according to the present invention, in the above-described configuration, the engagement between the holders between adjacent unit cell groups is specifically determined by the engagement protrusion provided on one side being engaged with the engagement hole provided on the other side. It can be set as the structure made by inserting closely. By adopting such a configuration, the engagement between the holders of the adjacent cell groups can be reliably achieved with a simple configuration, and the cell groups can be reliably positioned within the exterior.
　本発明に係る電池パックでは、上記構成において、複数の素電池グループの各々におけるホルダーに、係合突起および係合穴がそれぞれ複数設けられているという構成にすることができる。このように係合突起と係合穴をそれぞれ複数設けるようにすれば、素電池グループ同士の係合がより強固なものとなり、高い位置精度を得る上で効果を奏する。
　本発明に係る電池パックでは、上記構成において、ホルダーが、板状の本体部と、本体部に上記１または複数の素電池を載置した場合に、その周囲を囲む囲繞部とを有し、係合突起および係合穴の一方が、複数の素電池グループの並設方向における一方の側の囲繞部の外面に設けられており、他方が前記一方の側とは反対側の前記囲繞部の外面に設けられているという構成とすることができる。このような構成とすれば、素電池グループ同士が直列的に連設されることになり、製造時における作業効率を高くすることが可能となる。 In the battery pack according to the present invention, in the above configuration, a plurality of engagement protrusions and engagement holes can be provided in the holders of each of the plurality of unit cell groups. If a plurality of engagement protrusions and engagement holes are provided in this way, the engagement between the cell groups becomes stronger, which is effective in obtaining high positional accuracy.
In the battery pack according to the present invention, in the configuration described above, the holder has a plate-shaped main body portion, and when the one or more unit cells are placed on the main body portion, a surrounding portion surrounds the periphery. One of the engagement protrusion and the engagement hole is provided on the outer surface of the surrounding portion on one side in the juxtaposition direction of the plurality of unit cell groups, and the other of the surrounding portion on the side opposite to the one side It can be set as the structure provided in the outer surface. With such a configuration, the unit cell groups are connected in series, and it is possible to increase the working efficiency during manufacturing.
　本発明に係る電池パックでは、上記構成において、複数の素電池グループの各々のホルダーにおける本体部の主面の一部に前記素電池が載置されず、解放された領域が存在し、複数の素電池グループを並設した状態において、複数の素電池グループにおけるホルダーの前記解放された領域同士が連なる状態となる。そして、回路基板の少なくとも一部が上記解放された領域同士が連なってなる部分に載置されているという構成とすることができる。このような構成とする場合には、外装ケース内への収納前に、回路基板についても複数の素電池グループに対して正確な位置決めをした状態とすることができる。よって、作業効率を高くすることが可能となる。 In the battery pack according to the present invention, in the above configuration, the unit cell is not placed on a part of the main surface of the main body portion of each holder of the plurality of unit cell groups, and there is a released region, In the state where the unit cell groups are arranged side by side, the released regions of the holders in the plurality of unit cell groups are connected to each other. And it can be set as the structure that at least one part of a circuit board is mounted in the part in which the said open | released area | regions continued. In the case of such a configuration, the circuit board can be accurately positioned with respect to the plurality of unit cell groups before being housed in the outer case. Therefore, it is possible to increase work efficiency.
　本発明に係る電池パックでは、上記構成において、複数の素電池グループの各々から、回路基板との接続に供されるリード板が、素電池グループにおけるホルダーの上記解放された領域に向けて突設されており、回路基板において、ホルダーの上記解放された領域同士が連なってなる部分に載置される部分における素電池グループの中心側先端の辺に沿う縁部分に、複数の素電池グループにおける複数のリード板に対応して導電ランドが設けられているという構成を採用することができる。このような構成を採用すれば、ホルダーの上記解放された領域上に回路基板の少なくとも一部を載置し、当該状態でリード板の先端部分と導電ランドとを接続することで、コアパックが完成されることになる。よって、電池パックの製造の効率化を図る上で効果を奏する。 In the battery pack according to the present invention, in the above configuration, a lead plate provided for connection to the circuit board is projected from each of the plurality of unit cell groups toward the released region of the holder in the unit cell group. In the circuit board, a plurality of the plurality of unit cell groups are arranged on the edge portion along the edge of the center side of the unit cell group in the portion placed on the portion where the released regions of the holder are connected to each other. A configuration in which conductive lands are provided corresponding to the lead plates can be employed. By adopting such a configuration, by placing at least a part of the circuit board on the released region of the holder and connecting the tip portion of the lead plate and the conductive land in this state, the core pack is It will be completed. Therefore, there is an effect in improving the efficiency of manufacturing the battery pack.
　本発明に係る電池パックでは、上記構成において、回路基板から、複数の素電池グループに属する素電池の外面に対して接触するように、感熱素子が突設されているという構成とすることもできる。このような構成とすれば、ホルダーの上記解放された領域上に回路基板の少なくとも一部を載置することにより、感熱素子が素電池に接触することになり、製造に係る効率化を図りながら、高い安全性の電池パックを得ることができる。 In the battery pack according to the present invention, in the above configuration, a heat sensitive element may be provided so as to project from the circuit board to the outer surface of the unit cell belonging to the plurality of unit cell groups. . With such a configuration, by placing at least a part of the circuit board on the released area of the holder, the thermal element comes into contact with the unit cell, while improving the efficiency of manufacturing. A battery pack with high safety can be obtained.
　本発明に係る電池パックでは、上記構成において、複数の素電池は、各々が扁平角形の外観形状を有するとともに、互いに同一の外形サイズを有するという構成とすることができる。ただし、本発明では、素電池の外観形状は、これに限定されるものではない。 In the battery pack according to the present invention, in the above configuration, the plurality of unit cells can be configured such that each has a flat rectangular external shape and the same external size. However, in the present invention, the external shape of the unit cell is not limited to this.
本発明の実施の形態に係る電池パック１の外観構成を示す模式斜視図である。It is a schematic perspective view which shows the external appearance structure of the battery pack 1 which concerns on embodiment of this invention. 電池パック１の内部構成を示す模式展開斜視図である。2 is a schematic exploded perspective view showing an internal configuration of the battery pack 1. FIG. コアパック１０の外観構成を示す模式斜視図である。2 is a schematic perspective view showing an external configuration of a core pack 10. FIG. コアパック１０の概略構成を示す模式展開斜視図である。1 is a schematic developed perspective view showing a schematic configuration of a core pack 10. 一の素電池グループ１０１の構成を示す模式展開斜視図である。2 is a schematic exploded perspective view showing a configuration of one unit cell group 101. FIG. 素電池グループ１０１におけるホルダー１０１４の構成を示す模式斜視図である。3 is a schematic perspective view showing a configuration of a holder 1014 in a unit cell group 101. FIG. 従来技術に係る電池パックの構成を示す展開斜視図である。It is an expansion | deployment perspective view which shows the structure of the battery pack which concerns on a prior art. 別の従来技術に係る電池パックの構成を示す展開斜視図である。It is an expansion | deployment perspective view which shows the structure of the battery pack which concerns on another prior art.
　以下では、本発明を実施するための形態について、図面を参酌しながら説明する。なお、以下で示す具体例は、本発明の構成およびその構成から奏される作用・効果を分かりやすく説明するために用いる一例であって、本発明は、発明の本質とする構成部分以外について、以下の具体例に何ら限定を受けるものではない。
　［実施の形態］
　１．電池パック１の外観構成
　本実施の形態に係る電池パック１の外観構成について、図１を用い説明する。 Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. In addition, the specific example shown below is an example used for easily explaining the configuration of the present invention and the operations and effects produced from the configuration, and the present invention is not limited to the components essential to the invention. The following specific examples are not limited at all.
[Embodiment]
1. External Configuration of Battery Pack 1 The external configuration of the battery pack 1 according to the present embodiment will be described with reference to FIG.
　図１に示すように、本実施の形態に係る電池パック１は、ともに扁平な浅皿状の上ケース１１と下ケース１２との開口部同士を突き合わせて構成される外装ケースを備える。上ケース１１におけるＹ軸方向手前側には、一部に窓部１１ａが開けられており、内部から外部接続端子１０３１が露出している。
　また、上ケース１１のＺ軸方向上面の一部には、透光性を有する保護ラベル１５が貼着されている。 As shown in FIG. 1, the battery pack 1 according to the present embodiment includes an outer case configured by abutting the openings of an upper case 11 and a lower case 12 that are both flat and shallow. A window portion 11a is partially opened on the front side in the Y-axis direction of the upper case 11, and the external connection terminal 1031 is exposed from the inside.
Further, a translucent protective label 15 is attached to a part of the upper surface of the upper case 11 in the Z-axis direction.
　２．電池パック１の内部構成
　電池パック１の内部構成について、図２を用い説明する。
　図２に示すように、電池パック１においては、上ケース１１と下ケース１２とで構成される外装ケースの内部空間に、コアパック１０が収納されている。コアパック１０は、下ケース１２の内底面に対して、両面粘着シール１３により貼着されている。 2. Internal Configuration of Battery Pack 1 The internal configuration of the battery pack 1 will be described with reference to FIG.
As shown in FIG. 2, in the battery pack 1, the core pack 10 is accommodated in the internal space of the outer case constituted by the upper case 11 and the lower case 12. The core pack 10 is attached to the inner bottom surface of the lower case 12 by a double-sided adhesive seal 13.
　上ケース１１におけるＺ軸方向上面には、インジケーター用の窓部１１ｂが開けられており、上述のように、保護ラベル１５が貼着されている。
　また、下ケース１２の外底面には、底ラベル１４が貼着されている。
　３．コアパック１０の構成
　電池パック１におけるコアパック１０の構成について、図３および図４を用い説明する。 A window portion 11b for an indicator is opened on the upper surface in the Z-axis direction of the upper case 11, and the protective label 15 is adhered as described above.
A bottom label 14 is attached to the outer bottom surface of the lower case 12.
3. Configuration of Core Pack 10 The configuration of the core pack 10 in the battery pack 1 will be described with reference to FIGS. 3 and 4.
　図３に示すように、本実施の形態に係る電池パック１のコアパック１０は、２つの素電池グループ１０１，１０２と１の回路基板１０３とを有し構成されている。素電池グループ１０１と素電池グループ１０２とは、互いに係合されることによりＸ軸方向に位置決めされ、当該状態で並設されている。
　回路基板１０３は、素電池グループ１０１，１０２の各一部の上方に、そのすべてが載置され、接合されている。外部接続端子１０３１は、コアパック１０におけるＹ軸方向手前側の端縁部分であって、Ｚ軸方向上側に実装されている。 As shown in FIG. 3, the core pack 10 of the battery pack 1 according to the present embodiment includes two unit cell groups 101 and 102 and one circuit board 103. The unit cell group 101 and the unit cell group 102 are positioned in the X-axis direction by being engaged with each other, and are juxtaposed in this state.
All of the circuit board 103 is placed and bonded above a part of each of the unit cell groups 101 and 102. The external connection terminal 1031 is an end portion of the core pack 10 on the front side in the Y-axis direction, and is mounted on the upper side in the Z-axis direction.
　図４に示すように、素電池グループ１０１と素電池グループ１０２とは、互いに同一の構成および外観形状を有している。各素電池グループ１０１，１０２の外面の一部には、回路基板１０３の載置領域である解放領域（領域Ａ１，Ａ２）が存在する。そして、各素電池グループ１０１，１０２の各々には、領域Ａ１，Ａ２に向けて突設されたリード板１０１５ａ～１０１５ｄ，１０２５ａ～１０２５ｄを有する。 As shown in FIG. 4, the unit cell group 101 and the unit cell group 102 have the same configuration and external shape. A part of the outer surface of each unit cell group 101, 102 has a release area (area A 1, A 2) that is a placement area of the circuit board 103. Each of the unit cell groups 101 and 102 has lead plates 1015a to 1015d and 1025a to 1025d projecting toward the regions A1 and A2.
　回路基板１０３では、基板本体１０３０におけるＹ軸方向負側の端縁部に、素電池グループ１０１，１０２の各リード板１０１５ａ～１０１５ｄ，１０２５ａ～１０２５ｄに対応して、導電ランド１０３２ａ～１０３２ｈが設けられている。また、回路基板１０３には、素電池グループ１０１，１０２のそれぞれに向けてＹ軸方向に突設されたサーミスタ素子１０３３ａ，１０３３ｂが設けられている。 In the circuit board 103, conductive lands 1032 a to 1032 h are provided at the edge on the negative side in the Y-axis direction of the board body 1030 corresponding to the lead plates 1015 a to 1015 d and 1025 a to 1025 d of the unit cell groups 101 and 102. ing. The circuit board 103 is provided with thermistor elements 1033a and 1033b that project in the Y-axis direction toward the unit cell groups 101 and 102, respectively.
　サーミスタ素子１０３３ａ，１０３３ｂは、それぞれ素電池グループ１０１，１０２における一の素電池の外面に当接するようになっており、それぞれ素電池の外面に対して保護ラベル１０４で貼着されている。
　４．素電池グループ１０１，１０２の構成
　素電池グループ１０１，１０２の構成について、図５を用い説明する。なお、図５では、一方の素電池グループ１０１だけを図示しているが、素電池グループ１０２についても同一の構成を有する。 The thermistor elements 1033a and 1033b are in contact with the outer surface of one unit cell in the unit cell groups 101 and 102, respectively, and are attached to the outer surface of the unit cell with a protective label 104, respectively.
4). Configuration of unit cell groups 101 and 102 The configuration of unit cell groups 101 and 102 will be described with reference to FIG. In FIG. 5, only one unit cell group 101 is illustrated, but the unit cell group 102 has the same configuration.
　図５に示すように、素電池グループ１０１は、３つの素電池１０１１，１０１２，１０１３と、これらを保持するホルダー１０１４、さらには、素電池１０１１，１０１２，１０１３同士およびこれらと回路基板１０３とを接続するリード板１０１５ａ～１０１５ｄを有する。素電池１０１１，１０１２，１０１３は、それぞれ扁平角形の外観形状を有するリチウムイオン電池であって、一方の端面に負極端子１０１１ａ，１０１２ａ，１０１３ａが形成され、残りの外面が正極１０１１ｂ，１０１２ｂ，１０１３ｂに相当する。 As shown in FIG. 5, the unit cell group 101 includes three unit cells 1011, 1012, and 1013, a holder 1014 that holds them, and further unit cells 1011, 1012, and 1013, and these and the circuit board 103. Lead plates 1015a to 1015d to be connected are provided. Each of the unit cells 1011, 1012, and 1013 is a lithium ion battery having a flat rectangular external shape. Negative electrode terminals 1011 a, 1012 a, and 1013 a are formed on one end surface, and the remaining outer surfaces are formed on the positive electrodes 1011 b, 1012 b, and 1013 b. Equivalent to.
　リード板１０１５ｂ，１０１５ｃ，１０１５ｄに各々には、ＰＴＣ素子１０１７ｂ，１０１７ｃ，１０１７ｄが介挿されている。また、素電池１０１１の外周面の一部とリード板１０１５ｄとの間には、互いの絶縁を図るために絶縁シート１０１６が介挿されている。
　なお、３つの素電池１０１１，１０１２，１０１３は、リード板１０１５ｂ，１０１５ｃにより、直列に接続されている。そして、これらのリード板１０１５ｂ，１０１５ｃについても、回路基板１０３に接続されるが、これらは各中間電圧値を検出するためのものである。 PTC elements 1017b, 1017c, and 1017d are inserted in the lead plates 1015b, 1015c, and 1015d, respectively. Further, an insulating sheet 1016 is interposed between a part of the outer peripheral surface of the unit cell 1011 and the lead plate 1015d in order to insulate each other.
The three unit cells 1011, 1012, and 1013 are connected in series by lead plates 1015 b and 1015 c. These lead plates 1015b and 1015c are also connected to the circuit board 103, and these are for detecting each intermediate voltage value.
　５．ホルダー１０１４の構成
　各素電池グループ１０１，１０２におけるホルダーの構成について、図６を用い説明する。図６では、素電池グループ１０１におけるホルダー１０１４を図示しているが、素電池グループ１０２におけるホルダーも同一構成を有する。図６（ａ）と図６（ｂ）とは、Ｙ軸を中心軸として１８０°回転した状態を示した関係にある。 5. Configuration of Holder 1014 The configuration of the holder in each unit cell group 101, 102 will be described with reference to FIG. In FIG. 6, the holder 1014 in the unit cell group 101 is illustrated, but the holder in the unit cell group 102 also has the same configuration. FIG. 6A and FIG. 6B are in a relationship showing a state of being rotated 180 ° with the Y axis as the central axis.
　図６（ａ）および図６（ｂ）に示すように、ホルダー１０１４は、Ｘ－Ｙ平面に沿って構成された板状の部分をベースとし、素電池１０１１，１０１２，１０１３を収納する各々の部分１０１４ａ，１０１４ｂ，１０１４ｃを囲むように設けられた囲繞部１０１４ｄ，１０１４ｅ，１０１４ｆ，１０１４ｇ，１０１４ｈ，１０１４ｉが一体に形成された構成を有する。 As shown in FIGS. 6A and 6B, the holder 1014 is based on a plate-like portion configured along the XY plane, and each of the cells 1011, 1012, and 1013 is accommodated therein. Enclosed portions 1014d, 1014e, 1014f, 1014g, 1014h, and 1014i provided so as to surround the portions 1014a, 1014b, and 1014c are integrally formed.
　素電池１０１１，１０１２，１０１３は、囲繞部１０１４ｄ，１０１４ｅ，１０１４ｆ，１０１４ｇ，１０１４ｈ，１０１４ｉによって囲繞された各部分１０１４ａ，１０１４ｂ，１０１４ｃに収納された状態で、各外周面の一部がベースとなる板状の部分に当接する。
　図６（ａ）に示すように、ホルダー１０１４におけるＸ軸方向の一方端の外面には、係合穴１０１４ｊが３箇所設けられている。また、図６（ｂ）に示すように、ホルダー１０１４におけるＸ軸方向の他方端の外面には、係合突起１０１４ｋが３箇所設けられている。係合穴１０１４ｊと係合突起１０１４ｋとは対応して設けられており、隣接する素電池グループ１０１，１０２のホルダー１０１４同士の間において、互いに係合する構成となっている。 The unit cells 1011, 1012, and 1013 are based on a part of each outer peripheral surface in a state of being accommodated in the portions 1014 a, 1014 b, and 1014 c surrounded by the surrounding portions 1014 d, 1014 e, 1014 f, 1014 g, 1014 h, and 1014 i. It contacts the plate-like part.
As shown in FIG. 6A, three engagement holes 1014j are provided on the outer surface of one end of the holder 1014 in the X-axis direction. Further, as shown in FIG. 6B, three engagement protrusions 1014k are provided on the outer surface of the other end of the holder 1014 in the X-axis direction. The engagement holes 1014j and the engagement protrusions 1014k are provided corresponding to each other, and are configured to engage with each other between the holders 1014 of the adjacent unit cell groups 101 and 102.
　６．効果
　本実施の形態に係る電池パック１では、２つの素電池グループ１０１，１０２が、各ホルダー１０１４同士における係合穴１０１４ｊへの係合突起１０１４ｋの密な挿入により係合され、これによって互いに位置決めされた状態で並設されている。よって、図７および図８に示す従来技術に係る電池パックに対し、製造時における作業性が高く、製造コストの低減を図ることが可能となる。 6). Effect In the battery pack 1 according to the present embodiment, the two unit cell groups 101 and 102 are engaged by the close insertion of the engaging protrusions 1014k into the engaging holes 1014j between the holders 1014, thereby positioning each other. Are arranged side by side. Therefore, the battery pack according to the prior art shown in FIG. 7 and FIG. 8 has high workability at the time of manufacturing, and can reduce the manufacturing cost.
　また、本実施の形態に係る電池パック１では、２つの素電池グループ１０１，１０２が互いに同一構成であるので、予め素電池グループ１０１，１０２を形成しておくことができ、電池パック１の組立時における作業の効率化を図ることができる。よって、電池パック１では、製造に係る作業効率が高く、製造コストの低減を図ることができる。
　また、本実施の形態に係る電池パック１では、各素電池グループ１０１，１０２において、当該グループ１０１，１０２に属する素電池１０１１，１０１２，１０１３，・・・がホルダー１０１４に保持されており、その状態で上ケース１１および下ケース１２で構成される外装ケースに収納されている。このため、電池パック１は、上記従来技術に係る電池パックよりも、素電池１０１１，１０１２，１０１３，・・・がホルダー１０１４に保持されている分だけ、耐衝撃性および耐振動性が高い。 In the battery pack 1 according to the present embodiment, since the two unit cell groups 101 and 102 have the same configuration, the unit cell groups 101 and 102 can be formed in advance. The work efficiency at the time can be improved. Therefore, in the battery pack 1, the work efficiency concerning manufacture is high and it can aim at reduction of manufacturing cost.
Further, in the battery pack 1 according to the present embodiment, in each of the unit cell groups 101 and 102, the unit cells 1011, 1012, 1013 and so on belonging to the groups 101 and 102 are held by the holder 1014, It is housed in an outer case composed of an upper case 11 and a lower case 12. For this reason, the battery pack 1 has higher impact resistance and vibration resistance than the battery pack according to the above-described prior art, as much as the unit cells 1011, 1012, 1013,.
　以上のことから、本実施の形態に係る電池パック１は、製造時における作業性に優れることで製造コストが安く、且つ、高い耐衝撃性および高い耐振動性を有する。
　また、本実施の形態に係る電池パック１では、ホルダー１０１４に、３つの係合穴１０１４ｊと３つの係合突起１０１４ｋが設けられており、素電池グループ１０１と素電池グループ１０２との間で３箇所の係合がなされている。このため、１箇所の係合穴と１箇所の係合突起によりホルダー間の係合を行う場合に比べて、係合の強度が高くなり、また、回路基板の組み付け時などに素電池グループ同士が互いに回転してしまうという事態を防止することができる。よって、高い位置精度を得る上で効果を奏するとともに、製造時における作業効率という観点から効果を奏する。 From the above, the battery pack 1 according to the present embodiment is excellent in workability at the time of manufacture, so that the manufacturing cost is low, and it has high impact resistance and high vibration resistance.
Further, in the battery pack 1 according to the present embodiment, the holder 1014 is provided with three engagement holes 1014j and three engagement protrusions 1014k, and 3 between the unit cell group 101 and the unit cell group 102. The locations are engaged. For this reason, compared with the case where the engagement between the holders is performed by one engagement hole and one engagement projection, the strength of the engagement is increased, and the unit cell groups are connected to each other when the circuit board is assembled. Can be prevented from rotating with respect to each other. Therefore, it is effective in obtaining high positional accuracy, and also effective from the viewpoint of work efficiency during manufacturing.
　また、本実施の形態に係る電池パック１では、コアパック１０において、２つの素電池グループ１０１，１０２の各々のホルダー１０１４における本体部の主面の一部に素電池１０１１，１０１２，１０１３，・・・が載置されず、解放された領域（図４における領域Ａ１，Ａ２）が存在し、２つの素電池グループ１０１，１０２を並設した状態において、領域Ａ１と領域Ａ２とが連なる状態となる。そして、回路基板１０３の少なくとも一部が連なってなる領域Ａ１，Ａ２の上方に載置されている。このような構成とする電池パック１では、外装ケース内への収納前に、コアパック１０における回路基板１０３についても２つの素電池グループ１０１，１０２に対して正確な位置決めをした状態とすることができる。よって、作業効率を高くすることが可能となる。 In the battery pack 1 according to the present embodiment, in the core pack 10, the unit cells 1011, 1012, 1013, and the like are formed on a part of the main surface of the main body portion of the holder 1014 of each of the two unit cell groups 101 and 102. .. Are not placed, there are released areas (areas A1 and A2 in FIG. 4), and in a state where two unit cell groups 101 and 102 are juxtaposed, the area A1 and the area A2 are connected to each other. Become. And it is mounted above the area | region A1, A2 where at least one part of the circuit board 103 continues. In the battery pack 1 having such a configuration, the circuit board 103 in the core pack 10 may be accurately positioned with respect to the two unit cell groups 101 and 102 before being housed in the outer case. it can. Therefore, it is possible to increase work efficiency.
　さらに、本実施の形態に係る電池パック１では、２つの素電池グループ１０１，１０２からリード板１０１５ａ～１０１５ｄ，１０２５ａ～１０２５ｄが突設され、回路基板１０３の一端縁部の対応部分に導電ランド１０３２ａ～１０３２ｈが設けられており、コアパック１０においては、これらが接続されている。よって、電池パック１の製造の効率化を図る上で効果を奏する。 Furthermore, in the battery pack 1 according to the present embodiment, lead plates 1015a to 1015d and 1025a to 1025d are projected from the two unit cell groups 101 and 102, and the conductive land 1032a is formed at a corresponding portion of one end edge of the circuit board 103. ˜1032h are provided, and in the core pack 10, these are connected. Therefore, there is an effect in improving the efficiency of manufacturing the battery pack 1.
　［その他の事項］
　上記実施の形態に係る電池パック１では、２つの素電池グループ１０１，１０２を備える構成としたが、３つ以上の素電池グループを備える構成とすることもできる。また、複数の素電池グループの並設の方向については、Ｘ軸方向に限らず、Ｙ軸方向やＺ軸方向とすることもできる。この場合には、係合突起および係合穴の位置を適宜変更することにより、上記同様の効果を得ることができ、また、リード板の突設方向についても同様である。 [Other matters]
In the battery pack 1 according to the above-described embodiment, the configuration includes the two unit cell groups 101 and 102, but the configuration may include three or more unit cell groups. In addition, the direction in which the plurality of unit cell groups are arranged side by side is not limited to the X-axis direction, and may be the Y-axis direction or the Z-axis direction. In this case, the same effects as described above can be obtained by appropriately changing the positions of the engaging protrusions and the engaging holes, and the same applies to the protruding direction of the lead plate.
　また、上記実施の形態では、各素電池グループ１０１，１０２において、３つの素電池１０１１，１０１２，１０１３を構成中に含むこととしたが、各素電池グループにおける素電池数については、これに限定されるものではない。例えば、１つまたは２つとすることもできるし、４つ以上とすることもできる。
　また、素電池の形態について、上記実施の形態では、扁平角形のリチウムイオン電池としたが、これについても限定を受けるものではない。例えば、円筒形や金属ラミネート外装電池などを採用することもできる。また、電池種類についても、ニッケルカドミウム電池やニッケル水素電池などのアルカリ電池を採用することもできる。 In the above embodiment, each unit cell group 101 and 102 includes three unit cells 1011, 1012 and 1013 in the configuration, but the number of unit cells in each unit cell group is limited to this. Is not to be done. For example, it can be one or two, or four or more.
In addition, regarding the form of the unit cell, in the above-described embodiment, a flat rectangular lithium ion battery is used, but this is not limited. For example, a cylindrical shape or a metal laminate outer battery may be employed. Moreover, alkaline batteries, such as a nickel cadmium battery and a nickel metal hydride battery, can also be adopted as the battery type.
　また、上記実施の形態では、素電池グループ１０１，１０２における各ホルダー１０１４の構成材料については、特に言及しなかったが、例えば、絶縁性を有する樹脂材料などが好適である。ただし、ホルダーの構成材料については、これに限定されるものではなく、例えば、表面が絶縁処理された金属材料などを用いることも可能である。 In the above embodiment, the constituent materials of the holders 1014 in the unit cell groups 101 and 102 are not particularly mentioned, but for example, an insulating resin material or the like is suitable. However, the constituent material of the holder is not limited to this, and for example, a metal material whose surface is insulated can be used.
　本発明は、製造コストが安く、且つ、高い耐衝撃性・耐振動性を備える電池パックを形成するのに有用である。 The present invention is useful for forming a battery pack with low manufacturing cost and high impact resistance and vibration resistance.
　　　１．電池パック
　　１０．コアパック
　　１１．上ケース
　　１２．下ケース
　　１３．両面粘着シール
　　１４．底ラベル
　　１５，１０４．保護ラベル
　１０１，１０２．素電池グループ 
　１０３．回路基板
１０１１，１０１２，１０１３．素電池
１０１４．ホルダー
１０１４ｊ．係合穴
１０１４ｋ．係合突起
１０１５ａ～１０１５ｄ，１０２５ａ～１０２５ｄ．リード板
１０１６．絶縁シート
１０１７ａ，１０１７ｃ，１０１７ｄ．ＰＴＣ素子
１０３０．基板本体
１０３１．外部接続端子
１０３２ａ～１０３２ｈ．導電ランド
１０３３ａ，１０３３ｂ．サーミスタ素子 1. Battery pack 10. Core pack 11. Upper case 12. Lower case 13. Double-sided adhesive seal 14. Bottom label 15,104. Protective label 101,102. Cell group
103. Circuit boards 1011, 1012, 1013. Unit cell 1014. Holder 1014j. Engagement hole 1014 k. Engagement protrusions 1015a to 1015d, 1025a to 1025d. Lead plate 1016. Insulating sheets 1017a, 1017c, 1017d. PTC element 1030. Substrate body 1031. External connection terminals 1032a to 1032h. Conductive lands 1033a, 1033b. Thermistor element

Claims (8)

  1. 　外装ケースと、
    　前記外装ケースの内部空間に収納された複数の素電池と、
    　前記外装ケースの内部空間に収納され、前記複数の素電池の各正負極端子に接続された回路基板と、
    を備え、
    　前記複数の素電池は、互いに同一構成の複数の素電池グループにグループ分けされ、
    　前記複数の素電池グループの各々は、前記１または複数の素電池と、当該１または複数の素電池を保持するホルダーとを有し、
    　前記複数の素電池グループは、隣接する素電池グループの前記ホルダー同士が係合することにより互いに位置決めされた状態で、並設されている
    　ことを特徴とする電池パック。     An outer case,
    A plurality of unit cells housed in the internal space of the outer case;
    A circuit board housed in the internal space of the outer case and connected to the positive and negative terminals of the plurality of unit cells;
    With
    The plurality of unit cells are grouped into a plurality of unit cell groups having the same configuration,
    Each of the plurality of unit cell groups includes the one or more unit cells and a holder that holds the one or more unit cells,
    The battery pack, wherein the plurality of unit cell groups are juxtaposed in a state of being positioned with respect to each other by engaging the holders of adjacent unit cell groups.
  2. 　前記隣接する素電池グループ間における前記ホルダー同士の係合は、一方に設けられた係合突起が、他方に設けられた係合穴に対して密に挿入されることにより、なされていることを特徴とする請求項１に記載の電池パック。 Engagement of the holders between the adjacent unit cell groups is performed by closely inserting an engagement protrusion provided on one side into an engagement hole provided on the other side. The battery pack according to claim 1, characterized in that:
  3. 　前記複数の素電池グループの各々における前記ホルダーには、前記係合突起が複数設けられているとともに、前記係合穴も前記係合突起に対応して複数設けられている
    　ことを特徴とする請求項２に記載の電池パック。     The holder in each of the plurality of unit cell groups is provided with a plurality of the engaging protrusions, and a plurality of the engaging holes are provided corresponding to the engaging protrusions. Item 3. The battery pack according to Item 2.
  4. 　前記ホルダーは、板状の本体部と、前記本体部に前記１または複数の素電池を載置した場合に、その周囲を囲む囲繞部とを有し、
    　前記係合突起および前記係合穴は、その一方が、前記複数の素電池グループの並設方向における一方の側の前記囲繞部の外面に設けられており、他方が、前記一方の側とは反対側の前記囲繞部の外面に設けられている
    　ことを特徴とする請求項１から請求項３の何れかに記載の電池パック。     The holder has a plate-shaped main body part, and an enclosing part surrounding the periphery when the one or more unit cells are placed on the main body part,
    One of the engagement protrusion and the engagement hole is provided on the outer surface of the surrounding portion on one side in the juxtaposition direction of the plurality of unit cell groups, and the other is the one side. The battery pack according to any one of claims 1 to 3, wherein the battery pack is provided on an outer surface of the surrounding portion on the opposite side.
  5. 　前記複数の素電池グループの各々では、前記ホルダーにおける前記本体部の主面の一部に前記素電池が載置されず、解放された領域が存在し、
    　前記複数の素電池グループを並設した状態においては、前記複数の素電池グループにおけるホルダーの前記解放された領域同士が連なる状態となり、
    　前記回路基板は、少なくともその一部が前記解放された領域同士が連なってなる部分に載置されている
    　ことを特徴とする請求項４に記載の電池パック。     In each of the plurality of unit cell groups, the unit cell is not placed on a part of the main surface of the main body portion in the holder, and there is a released region,
    In the state where the plurality of unit cell groups are arranged side by side, the released regions of the holders in the plurality of unit cell groups are in a state of being connected,
    The battery pack according to claim 4, wherein at least a part of the circuit board is placed on a portion where the released areas are connected to each other.
  6. 　前記複数の素電池グループの各々からは、前記回路基板との接続に供されるリード板が、前記解放された領域に向けて突設されており、
    　前記回路基板では、前記解放された領域同士が連なってなる部分に載置される部分における素電池グループの中心側先端の辺に沿う縁部分に、前記複数の素電池グループの複数の前記リード板に対応して導電ランドが設けられている
    　ことを特徴とする請求項５に記載の電池パック。     From each of the plurality of unit cell groups, a lead plate provided for connection with the circuit board is projected toward the released region,
    In the circuit board, a plurality of the lead plates of the plurality of unit cell groups are arranged on an edge portion along a side of the front end on the center side of the unit cell group in a portion placed on a portion where the released regions are connected to each other. The battery pack according to claim 5, wherein a conductive land is provided in correspondence with the battery pack.
  7. 　前記回路基板からは、前記複数の素電池グループに属する素電池の外面に対して接触するように、感熱素子が突設されている
    　ことを特徴とする請求項５または請求項６に記載の電池パック。     The battery according to claim 5 or 6, wherein a heat sensitive element protrudes from the circuit board so as to come into contact with an outer surface of the unit cell belonging to the plurality of unit cell groups. pack.
  8. 　前記複数の素電池は、各々が扁平角形の外観形状を有するとともに、互いに同一の外形サイズを有する
    　ことを特徴とする請求項１から請求項７の何れかに記載の電池パック。     The battery pack according to any one of claims 1 to 7, wherein each of the plurality of unit cells has a flat rectangular external shape and the same external size.
PCT/JP2012/061007 2011-05-09 2012-04-25 Battery pack WO2012153632A1 (en)

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