WO2024185594A1 - 蓄電ユニット - Google Patents

蓄電ユニット Download PDF

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Publication number
WO2024185594A1
WO2024185594A1 PCT/JP2024/007118 JP2024007118W WO2024185594A1 WO 2024185594 A1 WO2024185594 A1 WO 2024185594A1 JP 2024007118 W JP2024007118 W JP 2024007118W WO 2024185594 A1 WO2024185594 A1 WO 2024185594A1
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WO
WIPO (PCT)
Prior art keywords
holder
cell
lead
capacitor
circuit board
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2024/007118
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
裕典 一ノ橋
佑一 田代
潔 脇中
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Intellectual Property Management Co Ltd
Original Assignee
Panasonic Intellectual Property Management Co Ltd
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 Panasonic Intellectual Property Management Co Ltd filed Critical Panasonic Intellectual Property Management Co Ltd
Priority to JP2025505249A priority Critical patent/JPWO2024185594A1/ja
Priority to CN202480015163.9A priority patent/CN120770056A/zh
Publication of WO2024185594A1 publication Critical patent/WO2024185594A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/08—Structural combinations, e.g. assembly or connection, of hybrid or EDL capacitors with other electric components, at least one hybrid or EDL capacitor being the main component
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G2/00—Details of capacitors not covered by a single one of groups H01G4/00-H01G11/00
    • H01G2/02—Mountings
    • 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

  • This disclosure relates to an energy storage unit, and more particularly to an energy storage unit including a circuit board and a plurality of capacitor cells.
  • Patent Document 1 discloses an energy storage unit that can be used as an auxiliary power supply for automobiles, etc. To assemble this energy storage unit, a circuit board is covered with a holder, multiple bus bars and multiple capacitors are placed on the holder, the lead terminals of each capacitor are connected to the corresponding bus bars, and then a cover is placed over the holder.
  • the energy storage unit includes a circuit board, a first cell holder and a second cell holder mounted on the circuit board, a first capacitor cell held by the first cell holder, a second capacitor cell held by the second cell holder, and a lead holder mounted on the circuit board and positioned between the first cell holder and the second cell holder.
  • the first capacitor cell has a first cell body having a first end face, and a first lead drawn from the first end face and inserted into the circuit board.
  • the second capacitor cell has a second cell body having a second end face, and a second lead drawn from the second end face and inserted into the circuit board.
  • the lead holder includes a first holder facing the first end face of the first cell body, and a second holder facing the second end face of the second cell body.
  • the first holder is configured to abut against the first lead.
  • the second holder is configured to abut against the second lead.
  • the present disclosure has the effect of making it possible to make the energy storage unit more compact.
  • FIG. 1 is a front view of the electricity storage unit according to the embodiment.
  • FIG. 2 is a cross-sectional view taken along line AA of FIG.
  • FIG. 3 is a cross-sectional view taken along line BB of FIG.
  • FIG. 4 is a cross-sectional view taken along line CC of FIG.
  • FIG. 5 is a perspective view of the power storage unit according to the embodiment.
  • FIG. 6 is an exploded perspective view of the electricity storage unit according to the embodiment.
  • FIG. 7 is a plan view of a first cell holder and a second cell holder included in the power storage unit of the embodiment.
  • FIG. 8 is a side view of the first cell holder and the second cell holder of the embodiment.
  • FIG. 9 is a perspective view of a lead holder included in the power storage unit of the embodiment.
  • FIG. 10 is a plan view of the lead holder of the embodiment.
  • FIG. 11 is a side view of an embodiment of a lead holder.
  • FIG. 12 is another side view of an embodiment of a lead holder.
  • FIG. 13 is an exploded perspective view of an electricity storage unit according to a modified example.
  • This disclosure provides a power storage unit that can be made compact.
  • an energy storage unit 9 of the embodiment includes a circuit board 1, a cell holder 2, a plurality of capacitor cells 3, and a lead holder 4.
  • the cell holder 2 includes a first cell holder 21 and a second cell holder 22 that are constructed separately.
  • the first cell holder 21 and the second cell holder 22 are attached to the circuit board 1 so as to be positioned side by side in the first direction D1.
  • the multiple capacitor cells 3 include multiple first capacitor cells 31 held by the first cell holder 21 and multiple second capacitor cells 32 held by the second cell holder 22.
  • the multiple first capacitor cells 31 are held by the first cell holder 21 so as to be aligned in a second direction D2 perpendicular to the first direction D1.
  • the multiple second capacitor cells 32 are held by the second cell holder 22 so as to be aligned in the second direction D2.
  • the lead holder 4 is attached to the circuit board 1 so as to be positioned between the first cell holder 21 and the second cell holder 22 in the first direction D1.
  • the first cell holder 21, the second cell holder 22, and the lead holder 4 are made of synthetic resin.
  • the circuit board 1 has a first surface 11 and a second surface 12 that face in opposite directions in a third direction D3.
  • the third direction D3 is perpendicular to the first direction D1 and the second direction D2.
  • the first direction D1, the second direction D2, and the third direction D3 are each arranged to be perpendicular to the remaining two directions.
  • the second surface 12 of the circuit board 1 is a surface on which multiple circuit components (not shown) are mounted.
  • the multiple circuit components are mounted on the second surface 12 of the circuit board 1 so as to form a charge/discharge circuit that controls the charging and discharging of the multiple capacitor cells 3 held in the cell holder 2.
  • some of the multiple circuit components that form the charge/discharge circuit may be mounted on a portion of the first surface 11 of the circuit board 1 that does not interfere with the placement of the cell holder 2.
  • the circuit board 1 is provided with a plurality of holes 13 for inserting leads.
  • the holes 13 are provided in the middle of the circuit board 1 in the first direction D1.
  • the holes 13 are positioned in two rows.
  • Each of the holes 13 penetrates the circuit board 1 in the third direction D3.
  • Each hole 13 opens to the first surface 11 of the circuit board 1 and also opens to the second surface 12 of the circuit board 1.
  • a pair of holes 13 is provided for one capacitor cell 3.
  • the pair of holes 13 are positioned adjacent to the end faces of the corresponding capacitor cells 3.
  • the multiple holes 13 include multiple first holes 131 arranged in a row to correspond to the multiple first capacitor cells 31, and multiple second holes 132 arranged in a row to correspond to the multiple second capacitor cells 32.
  • the multiple first holes 131 are, for example, five pairs of first holes 131
  • the multiple second holes 132 are, for example, five pairs of second holes 132.
  • the row of first holes 131 on the circuit board 1 is located between the first cell holder 21 and the lead holder 4.
  • the row of second holes 132 on the circuit board 1 is located between the second cell holder 22 and the lead holder 4.
  • the row of first holes 131 and the row of second holes 132 are parallel to each other.
  • a pair of first holes 131 are provided corresponding to one first capacitor cell 31, and a pair of second holes 132 are provided corresponding to one second capacitor cell 32.
  • the circuit board 1 is provided with a plurality of fixing holes 14, 15 into which a plurality of fixing devices 71, 72 for fixing the cell holder 2 are inserted, a plurality of insertion holes 16, 17 into which a portion of the cell holder 2 is inserted, and a plurality of fixing holes 18 into which a plurality of fixing devices 73 for fixing the lead holder 4 are inserted.
  • the plurality of fixing devices 71, 72 and the plurality of fixing devices 73 are each fixing screws.
  • the multiple fixing holes 14, 15 include multiple fixing holes 14 into which multiple fasteners 71 for fixing the first cell holder 21 are inserted, and multiple fixing holes 15 into which multiple fasteners 72 for fixing the second cell holder 22 are inserted.
  • Each fixing hole 14, 15 penetrates the circuit board 1 in the third direction D3.
  • Each fixing hole 14, 15 opens to the first surface 11 of the circuit board 1 and also opens to the second surface 12 of the circuit board 1.
  • the multiple fixing holes 14, 15 are, for example, four fixing holes 14, 15, and are located at each of the four corners of the circuit board 1, which is a rectangular flat plate.
  • the multiple insertion holes 16, 17 include multiple insertion holes 16 into which a portion of the first cell holder 21 is inserted, and multiple insertion holes 17 into which a portion of the second cell holder 22 is inserted.
  • Each insertion hole 16, 17 penetrates the circuit board 1 in the third direction D3.
  • Each insertion hole 16, 17 opens to the first surface 11 of the circuit board 1 and also opens to the second surface 12 of the circuit board 1.
  • the multiple insertion holes 16 are, for example, two insertion holes 16.
  • the multiple insertion holes 17 are, for example, two insertion holes 17.
  • the multiple fixing holes 18 are two fixing holes 18 provided at both ends of the circuit board 1 in the first direction D1. Each fixing hole 18 penetrates the circuit board 1 in the third direction D3. Each fixing hole 18 opens to the first surface 11 of the circuit board 1 and also opens to the second surface 12 of the circuit board 1.
  • the first cell holder 21 includes a plurality of first holding parts 211 arranged in a row in the second direction D2.
  • the plurality of first holding parts 211 are, for example, five first holding parts 211.
  • the five first holding parts 211 are provided so as to be able to hold five first capacitor cells 31 in a one-to-one relationship.
  • Each first holding portion 211 has a semicircular concave cross section (see FIG. 6). Each first holding portion 211 is configured to be able to fit one corresponding first capacitor cell 31 into it.
  • Each first holding portion 211 is provided with a plurality of elastic pieces 213 that elastically hold the first capacitor cell 31.
  • the plurality of elastic pieces 213 is, for example, six elastic pieces 213.
  • the six elastic pieces 213 include three elastic pieces 213 protruding from an edge portion on a first side in the second direction D2 of the first holding portion 211, and another three elastic pieces 213 protruding from an edge portion on a second side in the second direction D2 of the first holding portion 211. These six elastic pieces 213 elastically sandwich the corresponding first capacitor cell 31 from both sides in the second direction D2, thereby elastically holding the first capacitor cell 31.
  • the first cell holder 21 can hold five first capacitor cells 31 lined up in the second direction D2.
  • the first cell holder 21 includes a plurality of fixing holes 214, a plurality of hooks 215, a plurality of protrusions 216, and a plurality of first engagement portions 217.
  • the multiple fixing holes 214 are, for example, two fixing holes 214. Fixing devices 71 are inserted into the two fixing holes 214, respectively.
  • each fixing hole 214 of the first cell holder 21 communicates with a corresponding fixing hole 14 of the circuit board 1.
  • the multiple hooks 215 are, for example, two hooks 215. Each hook 215 engages with the circuit board 1. When the first cell holder 21 is attached, the two hooks 215 of the first cell holder 21 elastically hook onto both end edges of the circuit board 1 in the second direction D2.
  • the multiple protrusions 216 are, for example, two protrusions 216.
  • each protrusion 216 of the first cell holder 21 protrudes toward the circuit board 1 and is inserted into the corresponding insertion hole 16 of the circuit board 1.
  • the multiple first locking portions 217 each lock onto the lead holder 4.
  • the multiple first locking portions 217 are, for example, four first locking portions 217.
  • each first locking portion 217 protrudes from the edge portion of the first cell holder 21 that faces the lead holder 4 toward the side away from the circuit board 1.
  • the four first locking portions 217 are aligned in a row in the second direction D2. In the second direction D2, each first locking portion 217 is located between a pair of adjacent first retaining portions 211.
  • the second cell holder 22 has the same configuration as the first cell holder 21.
  • the second cell holder 22 includes a plurality of second holding portions 221 arranged in a row in the second direction D2.
  • the plurality of second holding portions 221 are, for example, five second holding portions 221.
  • the five second holding portions 221 are arranged to be capable of holding five second capacitor cells 32 in a one-to-one relationship.
  • Each second holding portion 221 has a semicircular concave cross section. Each second holding portion 221 is configured to be able to fit one corresponding second capacitor cell 32 into it.
  • Each second holding portion 221 is provided with a plurality of elastic pieces 223 that elastically hold the second capacitor cell 32.
  • the plurality of elastic pieces 223 is, for example, six elastic pieces 223.
  • the six elastic pieces 223 include three elastic pieces 223 protruding from an edge portion on a first side in the second direction D2 of the second holding portion 221, and another three elastic pieces 223 protruding from an edge portion on a second side in the second direction D2 of the second holding portion 221. These six elastic pieces 223 elastically sandwich the corresponding second capacitor cell 32 from both sides in the second direction D2, thereby elastically holding the second capacitor cell 32.
  • the second cell holder 22 can hold five second capacitor cells 32 aligned in the second direction D2.
  • the second cell holder 22 includes a plurality of fixing holes 224, a plurality of hooks 225, a plurality of protrusions 226, and a plurality of second locking portions 227.
  • the multiple fixing holes 224 are, for example, two fixing holes 224.
  • a fixing device 72 is inserted into each of the two fixing holes 224.
  • the multiple hooks 225 are, for example, two hooks 225. Each hook 225 engages with the circuit board 1. When the second cell holder 22 is in the attached state, the two hooks 225 of the second cell holder 22 elastically hook onto both end edges of the circuit board 1 in the second direction D2.
  • the multiple protrusions 226 are, for example, two protrusions 226.
  • each protrusion 226 of the second cell holder 22 protrudes toward the circuit board 1 and is inserted into the corresponding insertion hole 17 of the circuit board 1.
  • the multiple second locking portions 227 each lock onto the lead holder 4.
  • the multiple second locking portions 227 are, for example, four second locking portions 227.
  • each second locking portion 227 protrudes from the edge portion of the second cell holder 22 facing the lead holder 4 toward the side away from the circuit board 1.
  • the four second locking portions 227 are aligned in a row in the second direction D2.
  • each first locking portion 217 is located between a pair of adjacent first retaining portions 211.
  • the axial direction of the first cell body 310 coincides with the first direction D1.
  • the first end face 315 of the first capacitor cell 31 is located on the side of the first capacitor cell 31 closer to the second cell holder 22 and faces the lead holder 4.
  • a pair of first leads 318 drawn out from the first end surface 315 of the first capacitor cell 31 are inserted into a pair of first holes 131 located adjacent to the first end surface 315 in the first direction D1 (see FIG. 3) and are electrically connected to a charge/discharge circuit configured on the first surface 11 of the circuit board 1.
  • the second capacitor cell 32 has a cylindrical second cell body 320 and a pair of second leads 328 drawn out from a second end surface 325 of the second cell body 320.
  • the second end surface 325 is one side surface in the axial direction of the second cell body 320.
  • the pair of second leads 328 is a positive electrode second lead 328 and a negative electrode second lead 328, both of which are flexible.
  • the axial direction of the second cell body 320 coincides with the first direction D1.
  • the second end surface 325 of the second capacitor cell 32 is located on the side of the second capacitor cell 32 closer to the first cell holder 21 and faces the lead holder 4.
  • a pair of second leads 328 drawn out from the second end surface 325 of the second capacitor cell 32 are inserted into a pair of second holes 132 located adjacent to the second end surface 325 in the first direction D1 (see FIG. 3) and are electrically connected to a charge/discharge circuit configured on the first surface 11 of the circuit board 1.
  • the lead holder 4 includes a first holder 41, a second holder 42, a plurality of connecting portions 44, a plurality of intermediate support portions 45, and a plurality of fixing portions 46.
  • the multiple connecting parts 44 are parts that connect the first holder 41 and the second holder 42, and are formed integrally with the first holder 41 and the second holder 42.
  • the multiple connecting parts 44 are, for example, two connecting parts 44.
  • the multiple intermediate support parts 45 are parts that connect the first holder 41 and the second holder 42, and are formed integrally with the first holder 41 and the second holder 42.
  • the multiple intermediate support parts 45 are, for example, four intermediate support parts 45.
  • the multiple fixing parts 46 are parts used to fix the lead holder 4 to the circuit board 1, and are formed integrally with the first holder 41 and the second holder 42.
  • the multiple fixing parts 46 are, for example, two fixing parts 46.
  • the first holder 41 includes a plurality of pressing portions 411 and a plurality of intermediate portions 413 .
  • the multiple pressing portions 411 are five pressing portions 411 arranged in a row at a distance from each other in the second direction D2.
  • the multiple intermediate portions 413 are four intermediate portions 413 arranged in a row at a distance from each other in the second direction D2.
  • the pressing portions 411 and intermediate portions 413 are positioned alternately in the second direction D2 and are integrally connected in a straight line.
  • one corresponding intermediate part 413 is provided between a pair of adjacent pressing parts 411.
  • the corresponding intermediate part 413 is an intermediate part 413 that connects the pair of pressing parts 411.
  • the pressing portion 411 includes a first opposing surface 410 that faces the first cell holder 21, and a first raised portion 417 that is raised from a portion of the first opposing surface 410.
  • the first opposing surface 410 is a flat surface that faces the first end surface 315 of the first capacitor cell 31.
  • the first opposing surface 410 is a surface that is perpendicular to the first direction D1.
  • the first raised portion 417 has a long shape extending in the second direction D2.
  • the first raised portion 417 protrudes from the end of the first opposing surface 410 that is closer to the circuit board 1 in the third direction D3 toward the first cell holder 21 and the first capacitor cell 31 held therein.
  • the pressing portion 411 having the above-mentioned configuration is arranged to abut against a pair of first leads 318 of the corresponding first capacitor cell 31. More specifically, each pressing portion 411 of the first holder 41 is configured to press down a pair of first leads 318 of the corresponding first capacitor cell 31 by the pair of first leads 318 abutting against the first raised portion 417.
  • the intermediate section 413 is located between a pair of pressing sections 411 so as to connect the pair of pressing sections 411 adjacent to each other in the second direction D2.
  • the four intermediate portions 413 of the first holder 41 each have a slit-shaped first notch 415.
  • the first holder 41 includes a plurality of first notches 415 positioned at a distance from each other in the second direction D2.
  • the plurality of first notches 415 is, for example, four first notches 415.
  • Each of the four first cutouts 415 is cut out linearly from the end of the corresponding intermediate portion 413 that is closer to the circuit board 1 in the third direction D3 toward the side away from the circuit board 1.
  • the four first cutouts 415 are parallel to each other.
  • Second Holder 42 has the same configuration as the first holder 41.
  • the second holder 42 includes multiple pressing portions 421 and multiple intermediate portions 423.
  • the multiple pressing portions 421 are five pressing portions 421 arranged in a row at a distance from each other in the second direction D2.
  • the multiple intermediate portions 423 are four intermediate portions 423 arranged in a row at a distance from each other in the second direction D2.
  • the pressing portions 421 and intermediate portions 423 are positioned alternately in the second direction D2 and are integrally connected in a straight line.
  • one corresponding intermediate part 423 is provided between a pair of adjacent pressing parts 421.
  • the corresponding intermediate part 423 is an intermediate part 423 that connects the pair of pressing parts 421.
  • the pressing parts 421 face the corresponding second holding parts 221 and the second capacitor cells 32 held thereby in the first direction D1.
  • the pressing parts 421 face the second end faces 325 of the corresponding second capacitor cells 32 in a one-to-one relationship.
  • the pressing portion 421 includes a second opposing surface 420 that faces the second cell holder 22, and a second raised portion 427 that is raised from a portion of the second opposing surface 420.
  • the second opposing surface 420 is a flat surface that faces the second end surface 325 of the second capacitor cell 32.
  • the second opposing surface 420 is perpendicular to the first direction D1.
  • the second raised portion 427 has a long shape extending in the second direction D2.
  • the second raised portion 427 protrudes from the end of the second opposing surface 420 that is closer to the circuit board 1 in the third direction D3 toward the second cell holder 22 and the second capacitor cell 32 held therein.
  • the pressing portion 421 having the above-mentioned configuration is arranged to abut against a pair of second leads 328 of the corresponding second capacitor cell 32. More specifically, each pressing portion 421 of the second holder 42 is configured to press the pair of second leads 328 of the corresponding second capacitor cell 32 by the pair of second leads 328 abutting against the second raised portion 427.
  • the intermediate section 423 is located between a pair of pressing sections 421 so as to connect the pair of pressing sections 421 adjacent to each other in the second direction D2.
  • the four intermediate portions 423 of the second holder 42 each have a slit-shaped second notch 425.
  • the second holder 42 includes a plurality of second notches 425 positioned at a distance from each other in the second direction D2.
  • the plurality of second notches 425 is, for example, four second notches 425.
  • Each of the four second cutouts 425 is cut out linearly from the end of the corresponding intermediate portion 423 that is closer to the circuit board 1 in the third direction D3 toward the side away from the circuit board 1.
  • the four second cutouts 425 are parallel to each other.
  • connection part 44 is a part that connects the end part on the first side in the second direction D2 of the first holder 41 and the end part on the first side in the second direction D2 of the second holder 42, and is formed integrally with the first holder 41 and the second holder 42.
  • the other connecting portion 44 is a portion that connects the end portion on the second side in the second direction D2 of the first holder 41 to the end portion on the second side in the second direction D2 of the second holder 42, and is formed integrally with the first holder 41 and the second holder 42.
  • the two connecting portions 44 are curved toward each other.
  • the four intermediate support parts 45 are located between two connecting parts 44 located at both ends in the second direction D2.
  • the four intermediate support parts 45 are located at a distance from each other in the second direction D2.
  • the intermediate support portion 45 connects one intermediate portion 413 included in the first holder 41 and one intermediate portion 423 included in the second holder 42.
  • the intermediate portions 413 and 423 connected by each intermediate support portion 45 are positioned side by side in the first direction D1.
  • Each intermediate support portion 45 includes a first portion 453 that protrudes from the first holder 41 to a first side in the first direction D1, and a second portion 454 that protrudes from the second holder 42 to a second side in the first direction D1.
  • the first side in the first direction D1 is the side of the first holder 41 that is farther from the second holder 42.
  • the second side in the first direction D1 is the side of the second holder 42 that is farther from the first holder 41.
  • Each intermediate support portion 45 further includes a first opening 451 and a second opening 452 that are spaced apart from each other in the first direction D1.
  • the first opening 451 is provided in the first portion 453 of the intermediate support portion 45.
  • the first opening 451 opens toward the circuit board 1.
  • the first opening 451 penetrates the first portion 453 in the third direction D3.
  • the first portion 453 is further provided with a locking piece 455 facing the first opening 451.
  • the locking piece 455 is a portion on which the first locking portion 217 of the first cell holder 21 hooks.
  • the second opening 452 is provided in the second portion 454 of the intermediate support portion 45.
  • the second opening 452 is open toward the circuit board 1.
  • the second opening 452 penetrates the second portion 454 in the third direction D3.
  • the second portion 454 is further provided with a locking piece 456 facing the second opening 452.
  • the locking piece 456 is the portion on which the second locking portion 227 of the second cell holder 22 hooks.
  • the first locking portion 217 of the first cell holder 21 is inserted into the first opening 451 of the intermediate support portion 45, and the hook-shaped tip of the first locking portion 217 is elastically hooked onto the locking piece 455 facing the first opening 451.
  • the second locking portion 227 of the second cell holder 22 is inserted into the second opening 452 of the intermediate support portion 45, and the hook-shaped tip of the second locking portion 227 is elastically hooked onto the locking piece 456 facing the second opening 452.
  • the two fixing parts 46 constitute both ends in the second direction D2 of the lead holder 4.
  • Each fixing part 46 is provided with a fixing hole 465 penetrating in the third direction D3.
  • the fixing hole 465 is a through hole into which a fixture 73 for fixing the lead holder 4 is inserted (see FIG. 4).
  • One fixed portion 46 constituting the end of the lead holder 4 on the first side in the second direction D2 is formed integrally with one connecting portion 44.
  • the other fixed portion 46 constituting the end of the lead holder 4 on the second side in the second direction D2 is formed integrally with the other connecting portion 44.
  • the procedure for assembling the energy storage unit 9 using the circuit board 1, the cell holder 2, the multiple capacitor cells 3, and the lead holder 4 includes a first step of attaching the cell holder 2 to the circuit board 1, a second step of attaching the multiple capacitor cells 3 to the cell holder 2, and a third step of attaching the lead holder 4 to the circuit board 1.
  • the first cell holder 21 and the second cell holder 22 constituting the cell holder 2 are attached to the first surface 11 of the circuit board 1. It is preferable that a plurality of circuit components are mounted on the second surface 12 of the circuit board 1 in advance.
  • the first cell holder 21 is attached to the half of the first surface 11 on the first side in the first direction D1.
  • the first cell holder 21 is engaged with the circuit board 1 by elastically hooking the two hooks 215 of the first cell holder 21 onto both end edges of the circuit board 1 in the second direction D2.
  • the first cell holder 21 is secured to the circuit board 1 using multiple fasteners 71 while being engaged with the circuit board 1 using two hooks 215.
  • the multiple fasteners 71 are, for example, two fasteners 71.
  • the first cell holder 21 is secured to the circuit board 1 by inserting each of the two fasteners 71 into the corresponding fastening holes 214 of the first cell holder 21 and into the corresponding fastening holes 14 of the circuit board 1 and securing them.
  • the second cell holder 22 is attached to the second half of the first surface 11 in the first direction D1.
  • the second cell holder 22 is engaged with the circuit board 1 by elastically hooking the two hooks 225 of the second cell holder 22 onto both end edges of the circuit board 1 in the second direction D2.
  • the second cell holder 22 is secured to the circuit board 1 using a plurality of fasteners 72 while being engaged with the circuit board 1 using two hooks 225.
  • the plurality of fasteners 72 are, for example, two fasteners 72.
  • the second cell holder 22 is secured to the circuit board 1 by inserting each of the two fasteners 72 into the corresponding fastening holes 224 of the second cell holder 22 and into the corresponding fastening holes 15 of the circuit board 1 and securing them.
  • At least one first capacitor cell 31 is attached to the first cell holder 21 fixed to the circuit board 1
  • at least one second capacitor cell 32 is attached to the second cell holder 22 fixed to the circuit board 1.
  • four first capacitor cells 31 are attached to the first cell holder 21, and five second capacitor cells 32 are attached to the second cell holder 22.
  • the first capacitor cell 31 is fitted into the corresponding first holding portion 211 of the first cell holder 21 with the first end face 315 facing the second side of the first direction D1 (i.e., the side where the second holder 42 is located relative to the first holder 41).
  • a pair of first leads 318 drawn out from the first end face 315 of the first capacitor cell 31 are inserted into a corresponding pair of first holes 131.
  • the second capacitor cell 32 is fitted into the corresponding second holding portion 221 of the second cell holder 22 with the second end face 325 facing the first side of the first direction D1 (i.e., the side where the first holder 41 is located relative to the second holder 42).
  • a pair of second leads 328 drawn out from the second end face 325 of the second capacitor cell 32 are inserted into a corresponding pair of second holes 132.
  • the lead holder 4 is attached to the middle portion of the first surface 11 of the circuit board 1 in the first direction D1.
  • the lead holder 4 is positioned on the first cell holder 21 and the second cell holder 22 by inserting the four first locking portions 217 of the first cell holder 21 one-to-one into the four first openings 451 of the first holder 41, and by inserting the four second locking portions 227 of the second cell holder 22 one-to-one into the four second openings 452 of the second holder 42.
  • the lead holder 4 is positioned on the circuit board 1 via the first cell holder 21 and the second cell holder 22.
  • the first locking portion 217 inserted into each first opening 451 hooks onto the locking piece 455 facing the first opening 451.
  • the second locking portion 227 inserted into each second opening 452 hooks onto the locking piece 456 facing the second opening 452. This causes the lead holder 4 to be locked to the first cell holder 21 and the second cell holder 22.
  • the lead holder 4 is fixed to the circuit board 1 using a plurality of fasteners 73 while being engaged with the first cell holder 21 and the second cell holder 22.
  • the plurality of fasteners 73 is, for example, two fasteners 73.
  • the lead holder 4 is fixed to the circuit board 1 by inserting each of the two fasteners 73 into the corresponding fastening holes 465 of the lead holder 4 and into the corresponding fastening holes 18 of the circuit board 1 and fixing them.
  • the pair of first leads 318 of each first capacitor cell 31 held by the first cell holder 21 abuts against the first raised portion 417 of the opposing pressing portion 411 and is pressed by the first raised portion 417.
  • the first raised portion 417 is positioned overlapping a portion of the pair of first holes 131 through which the pair of first leads 318 are inserted.
  • the pair of second leads 328 of each second capacitor cell 32 held by the second cell holder 22 abuts against the second raised portion 427 of the opposing pressing portion 421 and is pressed by the second raised portion 427.
  • the second raised portion 427 is positioned so as to overlap a portion of the pair of second holes 132 through which the pair of second leads 328 are inserted.
  • the portion of the first holder 41 of the lead holder 4 where the first notch 415 is provided is more easily bent than the other portions, and the portion of the second holder 42 where the second notch 425 is provided is more easily bent than the other portions. Therefore, it is possible to prevent a biased load from being applied to a specific first capacitor cell 31 among the multiple first capacitor cells 31, and also to prevent a biased load from being applied to a specific second capacitor cell 32 among the multiple second capacitor cells 32.
  • FIG. 13 shows a modified example of the energy storage unit 9.
  • the first cell holder 21 has only one first holding portion 211
  • the second cell holder 22 has only one second holding portion 221.
  • the first holder 41 has only one pressing portion 411 and does not have an intermediate portion 413.
  • the second holder 42 has only one pressing portion 421 and does not have an intermediate portion 423.
  • the first holder 41 does not hold a plurality of first capacitor cells 31 in a row, but holds only one first capacitor cell 31.
  • the second holder 42 does not hold a plurality of second capacitor cells 32 in a row, but holds only one second capacitor cell 32.
  • a single lead holder 4 attached to the circuit board 1 can collectively hold down a pair of first leads 318 of the first capacitor cell 31 and a pair of second leads 328 of the second capacitor cell 32.
  • modified energy storage unit 9 Further examples of modified energy storage unit 9 are listed below.
  • first leads 318 are pressed against the first holder 41, but it is also possible for one first lead 318 to be pressed against the first holder 41.
  • second leads 328 are pressed against the second holder 42, but it is also possible for one second lead 328 to be pressed against the second holder 42.
  • the lead holder 4 includes four intermediate support parts 45 spaced apart from one another, but the lead holder 4 only needs to include at least one intermediate support part 45, and the number and shape of the intermediate support parts 45 are not particularly limited. As in the modified example shown in FIG. 13, the lead holder 4 may not include an intermediate support part 45.
  • the first cell holder 21 includes four first locking portions 217 spaced apart from each other, but the lead holder 4 only needs to include at least one first locking portion 217, and the number and shape of the first locking portions 217 are not particularly limited. As in the modified example shown in FIG. 13, the first cell holder 21 may not include a first locking portion 217.
  • the second cell holder 22 includes four second locking portions 227 spaced apart from each other, but the lead holder 4 only needs to include at least one second locking portion 227, and the number and shape of the second locking portions 227 are not particularly limited. As in the modified example shown in FIG. 13, the second cell holder 22 may not include a second locking portion 227.
  • each intermediate support portion 45 includes a first opening 451 and a second opening 452, but it is also possible that the first opening 451 and the second opening 452 are not included. In this case, it is preferable that the first locking portion 217 and the second locking portion 227 hook onto another portion of the intermediate support portion 45 or hook onto a portion other than the intermediate support portion 45.
  • the energy storage unit 9 in the above embodiment has both a locking structure that locks the lead holder 4 to the first cell holder 21 and the second cell holder 22, and a fixing structure that fixes the lead holder 4 to the circuit board 1, but it is also possible for it to have only the above locking structure or only the above fixing structure.
  • the energy storage unit 9 may also have a fixing structure that fixes the lead holder 4 to the first cell holder 21 and the second cell holder 22, or a locking structure that locks the lead holder 4 to the circuit board 1.
  • the first holder 41 includes four first notches 415 positioned at a distance from each other, but the first holder 41 only needs to include at least one first notch 415, and the number and shape of the first notches 415 are not particularly limited. It is possible that each intermediate portion 413 of the first holder 41 does not include a first notch 415, and it is also possible that at least one of the multiple intermediate portions 413 of the first holder 41 includes multiple first notches 415.
  • the second holder 42 includes four second notches 425 positioned at a distance from each other, but the second holder 42 only needs to include at least one second notch 425, and the number and shape of the second notches 425 are not particularly limited. It is possible that each intermediate portion 423 of the second holder 42 does not include a second notch 425, or at least one of the multiple intermediate portions 423 of the second holder 42 includes multiple second notches 425.
  • the first cell holder 21 includes five first raised portions 417 spaced apart from one another, but the first cell holder 21 only needs to include at least one first raised portion 417, and the number and shape of the first raised portions 417 are not particularly limited.
  • the first cell holder 21 may not include a first raised portion 417.
  • the second cell holder 22 includes five second raised portions 427 spaced apart from one another, but the second cell holder 22 only needs to include at least one second raised portion 427, and the number and shape of the second raised portions 427 are not particularly limited.
  • the second cell holder 22 may not include a second raised portion 427.
  • the energy storage unit (9) of the first aspect includes a circuit board (1), a first cell holder (21) and a second cell holder (22) mounted on the circuit board (1), a first capacitor cell (31) held in the first cell holder (21), a second capacitor cell (32) held in the second cell holder (22), and a lead holder (4) mounted on the circuit board (1) and positioned between the first cell holder (21) and the second cell holder (22).
  • the first capacitor cell (31) has a first cell body (310) having a first end surface (315), and a first lead (318) drawn from the first end surface (315) and inserted into the circuit board (1).
  • the second capacitor cell (32) has a second cell body (320) having a second end surface (325) and a second lead (328) drawn from the second end surface (325) and inserted into the circuit board (1).
  • the lead holder (4) includes a first holder (41) facing the first end surface (315) of the first cell body (310) and a second holder (42) facing the second end surface (325) of the second cell body (320).
  • the first holder (41) is configured to abut against the first lead (318).
  • the second holder (42) is configured to abut against the second lead (328).
  • the lead holder (4) attached to the circuit board (1) can collectively hold the first lead (318) of the first capacitor cell (31) and the second lead (328) of the second capacitor cell (32). This makes it possible to make the storage unit (9) more compact and to simplify the assembly work of the storage unit (9).
  • the first cell holder (21) and the second cell holder (22) are attached to the circuit board (1) so as to be aligned in a first direction (D1).
  • a plurality of first capacitor cells (31) including a first capacitor cell (31) are held in the first cell holder (21) so as to be aligned in a second direction (D2) perpendicular to the first direction (D1).
  • a plurality of second capacitor cells (32) including a second capacitor cell (32) are held in the second cell holder (22) so as to be aligned in the second direction (D2).
  • the lead holder (4) attached to the circuit board (1) can collectively hold down the first leads (318) of the multiple first capacitor cells (31) and the second leads (328) of the multiple second capacitor cells (32). This makes it possible to make the storage unit (9) including the multiple first capacitor cells (31) and the multiple second capacitor cells (32) more compact, and also simplifies the assembly process of the storage unit (9).
  • the plurality of first capacitor cells (31) includes a pair of adjacent first capacitor cells (31).
  • the plurality of second capacitor cells (32) includes a pair of adjacent second capacitor cells (32).
  • the first holder (41) includes a pressing portion A (411) against which a first lead (318) of one of the pair of first capacitor cells (31) comes into contact, a pressing portion B (411) against which a first lead (318) of the other of the pair of first capacitor cells (31) comes into contact, and an intermediate portion (413) located between the pressing portion A (411) and the pressing portion B (411) of the first holder (41).
  • the second holder (42) includes a pressing portion A (421) against which the second lead (328) of one of the pair of second capacitor cells (32) comes into contact, a pressing portion B (421) against which the second lead (328) of the other of the pair of second capacitor cells (32) comes into contact, and an intermediate portion (423) located between the pressing portion A (421) and the pressing portion B (421) of the second holder (42).
  • the lead holder (4) further includes an intermediate support portion (45) that connects the intermediate portion (413) of the first holder (41) and the intermediate portion (423) of the second holder (42).
  • the first holder (41) and the second holder (42) are connected together via the intermediate support portion (45), so that by simply attaching one lead holder (4) to the circuit board (1), the first leads (318) of each of the multiple first capacitor cells (31) and the second leads (328) of each of the multiple second capacitor cells (32) can be held together.
  • the lead holder (4) further includes an intermediate support portion (45) that connects the first holder (41) and the second holder (42).
  • the first cell holder (21) includes a first locking portion (217) that hooks onto the intermediate support portion (45).
  • the second cell holder (22) includes a second locking portion (227) that hooks onto the intermediate support portion (45).
  • the intermediate support portion (45) includes a first opening (451) and a second opening (452) that are spaced apart from each other.
  • the first cell holder (21) includes a first locking portion (217) that is inserted into the first opening (451) and hooked onto the intermediate support portion (45).
  • the second cell holder (22) includes a second locking portion (227) that is inserted into the second opening (452) and hooked onto the intermediate support portion (45).
  • the first opening (451) and the second opening (452) of the intermediate support portion (45) can be used to hook the lead holder (4) onto the first cell holder (21) and also hook the lead holder (4) onto the second cell holder (22).
  • the lead holder (4) is fixed to the circuit board (1).
  • the portion of the lead holder (4) that contacts the first lead (318) and the portion of the lead holder (4) that contacts the second lead (328) are each stably fixed to the circuit board (1).
  • the multiple first capacitor cells (31) include a pair of adjacent first capacitor cells (31).
  • the multiple second capacitor cells (32) include a pair of adjacent second capacitor cells (32).
  • the first holder (41) includes a pressing portion A (411) against which a first lead (318) of one of the pair of first capacitor cells (31) comes into contact, a pressing portion B (411) against which a first lead (318) of the other of the pair of first capacitor cells (31) comes into contact, and a first notch (415) located between the pressing portion A (411) and the pressing portion B (411) of the first holder (41).
  • the second holder (42) includes a pressing portion A (421) against which the second lead (328) of one of the pair of second capacitor cells (32) comes into contact, a pressing portion B (421) against which the second lead (328) of the other of the pair of second capacitor cells (32) comes into contact, and a second notch (425) located between the pressing portion A (421) and the pressing portion B (421) of the first holder (41).
  • the portion of the first holder (41) where the first notch (415) is provided is more likely to bend than other portions such as the pressing portion (411).
  • the portion of the second holder (42) where the second notch (425) is provided is more likely to bend than other portions such as the pressing portion (421).
  • the first holder (41) includes a first opposing surface (410) facing the first end surface (315) of the first capacitor cell (31) and a first raised portion (417) raised from a portion of the first opposing surface (410), and is configured so that the first lead (318) abuts against the first raised portion (417).
  • the second holder (42) includes a second opposing surface (420) facing the second end surface (325) of the second capacitor cell (32) and a second raised portion (427) raised from a portion of the second opposing surface (420), and is configured so that the second lead (328) abuts against the second raised portion (427).
  • the first lead (318) of the first capacitor cell (31) can be stably held down by the first raised portion (417) that is raised toward the first capacitor cell (31).
  • the second lead (328) of the second capacitor cell (32) can be stably held down by the second raised portion (427) that is raised toward the second capacitor cell (32).

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Battery Mounting, Suspending (AREA)
PCT/JP2024/007118 2023-03-07 2024-02-27 蓄電ユニット Ceased WO2024185594A1 (ja)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013098206A (ja) * 2011-10-28 2013-05-20 Panasonic Corp キャパシタモジュール
JP2017208481A (ja) * 2016-05-19 2017-11-24 株式会社オートネットワーク技術研究所 電源装置およびその製造方法
US20180242460A1 (en) * 2017-02-20 2018-08-23 Robert Bosch Gmbh Connector module

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013098206A (ja) * 2011-10-28 2013-05-20 Panasonic Corp キャパシタモジュール
JP2017208481A (ja) * 2016-05-19 2017-11-24 株式会社オートネットワーク技術研究所 電源装置およびその製造方法
US20180242460A1 (en) * 2017-02-20 2018-08-23 Robert Bosch Gmbh Connector module

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