WO2021065194A1 - Unité d'alimentation électrique et son procédé de production - Google Patents

Unité d'alimentation électrique et son procédé de production Download PDF

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Publication number
WO2021065194A1
WO2021065194A1 PCT/JP2020/030006 JP2020030006W WO2021065194A1 WO 2021065194 A1 WO2021065194 A1 WO 2021065194A1 JP 2020030006 W JP2020030006 W JP 2020030006W WO 2021065194 A1 WO2021065194 A1 WO 2021065194A1
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WO
WIPO (PCT)
Prior art keywords
storage
gas
power supply
exterior member
supply unit
Prior art date
Application number
PCT/JP2020/030006
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English (en)
Japanese (ja)
Inventor
道広 佐々木
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日本ケミコン株式会社
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Filing date
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Publication of WO2021065194A1 publication Critical patent/WO2021065194A1/fr

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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
    • 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
    • H01M50/30—Arrangements for facilitating escape of gases
    • 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
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/342—Non-re-sealable arrangements
    • 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 gas discharge technique for a plurality of battery cells housed in a case unit.
  • a battery cell is used as an in-vehicle power source for a hybrid car or an electric vehicle, or as a storage cell for a capacitor or a lithium ion battery covered with an exterior member such as a laminated film.
  • a means for discharging the gas generated at the time of abnormality from a part of the exterior member is adopted.
  • a plurality of battery cells are housed in a case to be modularized as a power supply unit, but the gas generated from one of the battery cells is discharged from a predetermined position, and this gas is used as another. It is necessary to prevent the battery cells from being affected.
  • a plurality of module cases containing assembled batteries are arranged side by side, and connections formed at equal intervals to each gas discharge hole formed on the outside of the module case.
  • a common discharge pipe having a portion is assembled (for example, Patent Document 1).
  • In-vehicle power supply units are required to be smaller and lighter. Further, the power supply unit needs to discharge the gas generated from the abnormal battery cell to the outside from the set portion so as not to affect other battery cells. For such gas discharge, if the discharge device is provided outside the case unit for accommodating the battery cells, there is a problem that the power supply unit becomes large. Further, since the battery cell tends to have a higher capacity or a higher voltage than the conventional one, the amount of gas released at the time of abnormality and the discharge pressure are also large. Therefore, there is a problem that it is necessary to secure sufficient airtightness while ensuring a sufficient volume of the gas discharge path.
  • Patent Document 1 There is no disclosure or suggestion in Patent Document 1 regarding such a problem, and such a problem cannot be solved by the configuration disclosed in Patent Document 1.
  • an object of the present invention is to reduce the size of the power supply unit while sufficiently ensuring the outgassing performance in view of the above problems.
  • one side surface of the power supply unit of the present disclosure is formed inside a stack of a plurality of stacked case units, and the power storage element is covered with an exterior member provided with a gas discharge port.
  • the storage unit is provided with a storage unit for storing the gas, and a discharge unit formed in a part of the storage unit for discharging the gas flowing out from the gas discharge port from the storage unit.
  • the gas discharge port is provided with the gas discharge port.
  • a part of the exterior member including the above is arranged.
  • the case unit is formed inside, and includes a standing wall portion that abuts on the exterior member.
  • the standing wall portion includes a gas discharge port but surrounds a part of the exterior member and is inside the standing wall portion.
  • the discharge portion may be formed by accommodating the gas.
  • the storage portion is formed between the case units by laminating the plurality of the case units, and the exterior around the gas discharge port is formed through the standing wall portion by the laminated case units.
  • the member may be sandwiched.
  • the case unit includes a storage surface portion including a holding portion for holding the electrode body of the power storage cell and a first standing wall portion that comes into contact with a part of the exterior member, and the other surface side of the storage surface portion.
  • the standing wall portion which is erected so as to face the first standing wall portion of another adjacent case unit, and is provided with a lid surface portion which is joined to the storage surface portion of the other case unit.
  • the exterior member around the gas discharge port may be sandwiched between the first standing wall portion and the second standing wall portion.
  • the standing wall portion may be provided with a notch portion for accommodating a part of the gas discharging means of the exterior member.
  • the vertical wall portion may be provided with a pressing convex portion.
  • the discharge unit has a wall portion in contact with the gas discharged from the gas discharge port and a gas in contact with the wall portion to the outside in a portion of the storage cell facing the gas discharge port. It may be provided with a drain hole for flowing.
  • the power storage cell is the exterior member housed in the storage portion, and may be provided with a vent hole for passing the gas in a portion facing the discharge hole.
  • one aspect of the method for manufacturing a power supply unit of the present disclosure is to stack a plurality of case units and provide gas outlets in a plurality of storage portions formed inside the laminated case units.
  • the step includes a step of arranging a part of the exterior member including the gas discharge port.
  • a gas discharge part is formed inside a storage part formed by stacking case units, and a part of an exterior member including a gas discharge port of a battery cell is housed in this discharge part to accommodate a power supply unit. Can be prevented from becoming large.
  • the exterior member of the battery cell is sandwiched by joining the first standing wall portion erected on one surface of the case unit and the second standing wall portion formed on the other case unit laminated on this case unit. By doing so, the airtightness of the discharge part can be ensured.
  • FIG. 5 is a cross-sectional view taken along the line AA of FIG.
  • FIG. 5 is a cross-sectional view taken along the line BB of FIG.
  • A is a laminated cross-sectional view of the cell holder when the battery cell is in a normal state
  • B is a laminated cross-sectional view of the cell holder in a state example when the battery cell is in an abnormal state
  • A is a sectional view taken along line CC of FIG. 5 showing a gas outlet in a normal state
  • B is a sectional view showing a gas discharge port in an abnormal state.
  • It is sectional drawing which shows the discharge part of the cell holder which concerns on 2nd Embodiment. It is sectional drawing which shows the structural example of the discharge part of a power supply unit.
  • FIG. 1 shows an example of an external configuration of a power supply unit according to the first embodiment.
  • the configuration shown in FIG. 1 is an example, and the present invention is not limited to such a configuration.
  • the power supply unit 2 is an example of a power supply device including a storage unit 4 for accommodating a plurality of battery cells 6. For example, power can be supplied to each battery cell 6, or a plurality of battery cells 6 are arranged in parallel or It is a means of connecting in series to supply power.
  • a plurality of cell holders 4-1, 4-2, 4-3, ..., 4-N for storing the battery cell 6 are laminated.
  • One battery cell 6 is housed in each of the cell holders 4-1, 4-2, 4-3, ..., 4-N.
  • the cell holders 4-1, 4-2, 4-3, ..., 4-N are examples of the case unit of the present invention, are components of the storage portion 4 of the power supply unit 2, and are battery cells. It is a functional component that holds 6. Further, the power supply unit 2 is formed with a discharge unit 8 that collects the gas discharged from the battery cell 6 inside the storage unit 4 and discharges the gas to the outside of the power supply unit 2.
  • the power supply unit 2 includes a cover case 10 that covers at least the terminal surface side of the stacked cell holders 4-1, 4-2, 4-3, ..., 4-N.
  • the cover case 10 functions as an exterior cover of the storage portion 4 by covering one surface of the stacked end cell holders 4-N, for example.
  • the power supply unit 2 may be provided with a cover case that covers the outer peripheral end face side of the cell holder 4-1 on the stacking start side.
  • the cell holders 4-1, 4-2, 4-3, ..., 4-N and the cover case 10 are each provided with a single or a plurality of gas vents 12.
  • a discharge unit that discharges gas by communicating the cell holders 4-1, 4-2, 4-3, ..., 4-N and the gas ventilation holes 12 formed in the cover case 10. 8 is configured.
  • the cell holders 4-1, 4-2, 4-3, ..., 4-N have terminals 14-1A, 14-2A, 14-3A, ... 14-NA, 14-1B, 14-2B, 14-3B ... 14-NB are arranged.
  • the same poles of the terminals of all the battery cells 6 may be stored facing in the same direction, or the battery cells 6 may be stored in different directions so that the polarities of the terminals are alternately different. May be good.
  • FIG. 2 shows an example of an assembly configuration of the power supply unit.
  • the cell holders 4-1, 4-2, 4-3, 4-4 ... Have, for example, a storage surface portion 16 for accommodating the battery cell 6 on one surface side, and the upper surface side of the battery cell 6 is exposed to the outside. It is housed in the storage area in an exposed state. Further, on the storage surface portion 16, for example, a gas discharge portion 18 is formed on a part of the storage area on the end side.
  • the gas discharge unit 18 is an example of a constituent part of the discharge unit 8 of the storage unit 4, and is partially provided with a gas vent hole 12.
  • the gas discharge portion 18 is formed in accordance with the gas discharge port 20 formed in the battery cell 6, or the battery cell 6 is arranged in the storage surface portion 16 in accordance with the position of the gas discharge port 20. Further, the battery cell 6 is provided with a gas vent hole 22 at a position which is a peripheral portion of the gas discharge port 20 and communicates with the gas vent hole 12 of the gas discharge portion 18.
  • the gas ventilation hole 22 is an example of a ventilation path through which the exhaust gas that has passed through the gas ventilation hole 12 of the gas discharge unit 18 passes.
  • the power supply unit 2 is formed in each storage surface portion 16 by stacking cell holders 4-1, 4-2, 4-3, 4-4, ... Arranged so as to face each other in the front-rear direction.
  • the storage portion is formed, and the gas discharge portion 18 is communicated with each other to form the discharge portion 8.
  • FIG. 3 shows a configuration example of a battery cell.
  • the power storage body 24 is covered with a laminate film (exterior member 26), and the end portion of the exterior member 26 is heat-welded along the periphery of the power storage body 24.
  • An example of a battery includes, for example, a lithium ion battery.
  • the storage body 24 is formed by, for example, laminating or winding electrode plates of a positive electrode and a negative electrode via a separator. Further, the power storage body 24 is led out to the outside of the exterior member 26 coated with the terminal portions 14-A and 14-B connected to the positive electrode plate or the negative electrode plate.
  • the battery cell 6 is provided with a valve function portion 28 including a gas discharge port 20 formed by reducing the welding strength, for example, in a part of a joint portion of the exterior member 26.
  • the valve function portion 28 is a fragile portion that tends to cause peeling or breakage of welding from the storage body 24 toward the gas discharge port 20 side.
  • the gas generated inside the battery cell 6 can be flowed from the storage body 24 to the valve function portion 28 side and discharged from the gas discharge port 20 or a peripheral portion thereof.
  • FIG. 4 shows a configuration example of the cell holder.
  • the cell holders 4-1, 4-2, 4-3, ..., 4-N are provided with a storage surface portion 16 for accommodating the battery cell 6 on one surface side, as shown in A of FIG. 4, for example, and are opposite to each other.
  • a lid surface portion 30 laminated on the storage surface portion 16 of the other cell holders 4-1, 4-2, 4-3, ..., 4-N is provided on the side surface.
  • On the storage surface portion 16 for example, at least a mounting surface portion 32 on which the power storage body 24 of the battery cell 6 is placed and an outer edge peripheral portion of the exterior member 26 of the battery cell 6 formed around the mounting surface portion 32 are placed.
  • a mounting portion 33 and a rib 34 erected on one end side of the mounting surface portion 32 are provided.
  • the mounting surface portion 32 forms a part of the storage portion 4 for storing the battery cell 6 inside by the storage wall 42 surrounding the peripheral surface while mounting the bottom surface side of the battery cell 6.
  • the rib 34 is an example of the first standing wall portion of the present invention, and is formed in a rectangular or circular shape so as to divide a part of the mounting surface portion 32.
  • the region divided by the rib 34 constitutes at least an exhaust area 36 in which the gas discharge port 20 and the gas vent 22 of the battery cell 6 are arranged.
  • the exhaust area 36 is an example of the exhaust unit 8 of the present invention.
  • one or a plurality of gas ventilation holes 12 and a blocking surface portion 40 arranged at a portion facing the gas discharge port 20 are provided inside the exhaust area 36.
  • the blocking surface portion 40 is brought into contact with the gas discharged from the gas discharge port 20 of the battery cell 6, and the adjacent cell holders 4-1, 4-2, 4-3, ... (Not shown) from the gas discharge port 20 ...
  • the rib 34 is provided with a notch 38 having a predetermined depth from the upper surface side.
  • the cutout portion 38 is an example of an accommodating portion that accommodates the deformed valve function portion 28. That is, the valve function portion 28 is deformed, for example, a part of the exterior member 26 is expanded by the gas generated in the storage body 24. At this time, a part or all of the valve function portion 28 is housed in the notch portion 38, and the gas flows to the gas discharge port 20 side through the inside thereof.
  • a part of the storage wall 42 is divided into the storage surface portion 16, and the terminal portions 14-A and 14-B of the battery cell 6 are divided into cell holders 4-1, 4-2, 4-3, ... , 4-N includes a lead-out unit 44 that leads out to the outside.
  • the lid surface 30 of the cell holders 4-1, 4-2, 4-3, ..., 4-N is the other cell holders 4-1 to be joined, 4-2, 4-3, ..., 4
  • This is an example of a component component formed by joining with the storage surface portion 16 of ⁇ N to form the storage portion 4.
  • an exhaust area 36 having a similar area is formed on the back surface side of the rib 34.
  • the rib 46 is formed.
  • This rib 46 is an example of the second standing wall portion of the present invention, and is a rib of a storage surface portion 16 of other cell holders 4-1, 4-2, 4-3, ..., 4-N to be laminated. It is formed at a position facing the rib 34 and at a height at which the rib 34 is joined.
  • the lid surface portion 30 includes, for example, a joint portion 43 for joining with the mounting portions 33 of other cell holders 4-1, 4-2, 4-3, ..., 4-N, and a lead-out portion for the storage surface portion 16.
  • a lead-out unit 48 formed by cutting out a part thereof is provided at a position facing the 44. The lead-out portion 48 covers one surface of the terminal portions 14-A and 14-B of the battery cell 6 or comes into contact with a part of the terminal portions 14-A and 14-B.
  • FIG. 6 and FIG. 7 show a configuration example of a cell holder accommodating a battery cell.
  • the storage surface portions 16 of the cell holders 4-1, 4-2, 4-3, ..., 4-N are formed in an area equivalent to the exterior member 26 of the battery cell 6, for example, as shown in FIG. ..
  • a part of the joint portion of the exterior member 26 is placed on the top surface of the rib 34, and the gas exhaust port 20, the gas vent hole 22, and the valve function portion 28 are separated by the rib 34. It is arranged so as to cover the exhaust area 36.
  • FIG. 6 shows a part of the joint portion of the exterior member 26 in the battery cell 6, a part of the joint portion of the exterior member 26 is placed on the top surface of the rib 34, and the gas exhaust port 20, the gas vent hole 22, and the valve function portion 28 are separated by the rib 34. It is arranged so as to cover the exhaust area 36.
  • FIG. 6 shows a part of the joint portion of the exterior member 26 a part of the joint portion of the exterior member 26
  • the power storage body 24 covered with the exterior member 26 is mounted on the mounting surface portion 32, and the joint portion of the exterior member 26 around the power storage body 24 is housed in the battery cell 6. It is mounted on a mounting portion 33 or a rib 34 formed on a peripheral surface portion of the surface portion 16.
  • the valve function portion 28 of the battery cell 6 is arranged, for example, on a notch portion 38 formed in a rib 34 in part or in whole, and with respect to the pressure of the gas generated inside the exterior member 26. It can be deformed toward the inside of the notch 38.
  • the exhaust area 36 surrounded by the ribs 34 is provided with a blocking surface portion 40 on the side facing the gas discharge port 20, and the gas flowing into the exhaust area 36 from the gas discharge port 20 and the valve function portion 28 is a lid surface portion 30. It is configured so that it is not discharged directly to the side.
  • the gas vent holes 12 are arranged so that the gas vents 22 formed at the joint portion of the battery cell 6 face each other, and are discharged from the gas discharge port 20 into the exhaust area 36.
  • the gas is discharged through the gas vents 12 and 22.
  • the lid surface portion 30 of the cell holders 4-1, 4-2, 4-3, ..., 4-N is formed in an area equivalent to, for example, the mounting surface portion 32 of the storage surface portion 16, and is also mounted.
  • the rib 46 is erected in the direction opposite to the rib 34 with the face portion 32 interposed therebetween.
  • the height L2 of the rib 46 is formed so as to be equal to or longer than the height L1 of the rib 34 (L1 ⁇ L2), for example.
  • cell holders 4- (X-1), 4-X, 4- (X + 1) are stacked>
  • cell holders 4- (X-1), 4-X, and 4- (X + 1) will be extracted and described as a part of the power supply unit 2.
  • the cell holders 4- (X-1), 4-X, 4- (X + 1) are laminated on the power supply unit 2, for example, as shown in A of FIG. 8, the mounting portion 33 of the storage surface portion 16 is formed.
  • the joint portion 43 of the lid surface portion 30 is joined, a storage portion 4 for each battery cell 6 is formed between them.
  • the exhaust portion 8 of the power supply unit 2 is formed by joining the ribs 34 and 46 facing each other so that the respective exhaust areas 36 communicate with each other.
  • the gas vent holes 12 of all the exhaust areas 36 and the gas discharge port 20 of the battery cell 6 communicate with each other in a straight line, and in the exhaust area 36, for example.
  • the case where the arrangement position of the gas discharge port 20 is different for each of the cell holders 4- (X-1), 4-X, 4- (X + 1) is also included.
  • the discharge portion 8 of the power supply unit 2 is formed by laminating the cell holders 4- (X-1), 4-X, 4- (X + 1) and joining the opposing ribs 34 and 46 to the top surface of the rib 34. A part of the joint surface of the exterior member 26 placed on the top is sandwiched.
  • each exhaust area 36 can be hermetically sealed to the storage portion 4 by joining the ribs 34 and 46.
  • an abnormality has occurred in a part of the battery cells 6X, and gas is generated inside the exterior member 26 that covers the power storage body 24.
  • the exterior member 26 is in an expanded state according to the volume formed between the storage surface portion 16 of one cell holder and the lid surface portion 30 of the facing cell holder.
  • the volume of the area in which the battery cell 6 is housed is set according to, for example, the height at which the height L1 of the rib 34 and the height L2 of the rib 46 are joined.
  • the gas that flows in through the valve function portion 28 of the battery cell 6 and is discharged from the gas discharge port 20 passes through the adjacent exhaust area 36 through the gas vents 12 and 22. , Is discharged to the outside of the power supply unit 2.
  • a part of the exterior member 26 sandwiched between the joint surfaces of the ribs 34 and 46 is arranged in the notch 38 formed in the ribs 34 and 46, as shown in FIG. 9A, for example.
  • the exterior member 26 is formed as a blocking body by pressing the portions sandwiched between the ribs 34 and 46 in the opposite direction, whereas the portion arranged in the notch 38 is released from the pressure.
  • the exterior member 26 is a valve function portion 28 in which the joint between the exterior members 26 is weakened, for example, at least for a portion arranged inside the notch portion 38 and a portion including the gas discharge port 20.
  • the exterior member 26 is arranged in the notch 38 due to the expansion pressure applied from the storage body 24 side.
  • the formed portion is deformed to become the valve opening portion O.
  • gas flows from the power storage body 24 side toward the valve opening portion O side, and the gas flows from the gas discharge port 20 to the exhaust area 36 side.
  • the valve function portion 28 is not limited to the case where a part of the joint portion is opened as in the valve opening portion O when gas is generated on the power storage body 24 side, and the valve function portion 28 is an exterior member in or around the notch portion 38. Part of 26 may burst.
  • the manufacturing process shown here is an example of a method for manufacturing a power supply unit, and the present invention is not limited to such processing contents.
  • the manufacturing process of the power supply unit 2 includes, for example, the following steps.
  • (A) The battery cell 6 is placed in the plurality of cell holders 4-1, 4-2, 4-3, ..., 4-N.
  • the gas discharge port 20 of the battery cell 6 is aligned with the position of the exhaust area 36 (FIG. 4A) formed in the cell holders 4-1, 4-2, 4-3, ..., 4-N, and at the same time.
  • the gas exhaust port 20 faces the gas vents 12 and 22.
  • Ribs 34 and 46 having a predetermined length are formed at opposite positions on both sides of the cell holders 4-1, 4-2, 4-3, ..., 4-N, and the ribs 34 and 46 are joined by laminating. By doing so, the barrier property between the area where the battery cell 6 is housed and the exhaust area 36 can be maintained.
  • (5) By forming a notch 38 in a part of the ribs 34 and 46 and arranging the valve function 28 of the exterior member 26 inside the notch 38, the gas generated in the power storage body 24 is exhausted through the valve function 28. It can be guided to the area 36 side.
  • FIG. 10 shows a configuration example of cell holders 4-1, 4-2, 4-3, ..., 4-N of the power supply unit according to the second embodiment.
  • the configuration shown in FIG. 10 is an example, and the present invention is not limited to such a configuration. Further, in FIG. 10, the same parts as those in FIGS. 1, 6, 7, and 7 are designated by the same reference numerals.
  • the power supply unit 2 is a plurality of stacked cell holders 4-1, 4-2, 4-3, ..., 4-N, and is connected to the adjacent storage surface portions 16. A storage portion in which the battery cell 6 is arranged is formed between the lid surface portion 30 and the lid surface portion 30.
  • ribs 34 and 46 are erected on a part of the storage surface portion 16 and the lid surface portion 30 constituting the storage portion.
  • the area divided by the ribs 34 and 46 is used as the exhaust area 36.
  • an exhaust unit 8 for discharging gas is formed by an exhaust area 36 that communicates with the power supply unit 2.
  • the ribs 34 and 46 of this embodiment have a concave portion 50 or a convex portion 52 formed on a top surface portion on which a part of the exterior member 26 of the battery cell 6 is placed.
  • the convex portion 52 is an example of the pressing convex portion of the present invention.
  • the concave portion 50 is an example of a fitting portion that fits with the convex portion 52, and the ribs 34, 46 are formed by laminating cell holders 4-1, 4-2, 4-3, ..., 4-N. It will be in a mated state at the time of joining.
  • the opening width and depth of the concave portion 50 are equal to or close to the protruding width and protruding length of the convex portion 52, and are set so as to be in close contact with each other at the time of fitting.
  • the exterior member 26 of No. 6 is pressed and deformed, and is inserted into each of the recesses 50. At this time, the exterior member 26 is deformed along the shapes of the convex portion 52 and the concave portion 50 to be fitted, and the exterior member 26 is in close contact with the joint portion of the ribs 34 and 46.
  • the concave portion 50 and the convex portion 52 may be formed on, for example, the top surfaces of the ribs 34 and 46, and may be formed as a whole or a part thereof except for the notch portion 38 (not shown).
  • the power supply unit 2 can be reduced in size and weight.
  • the exhaust portion 8 composed of the exhaust area 36 and the laminated cell holder 4 are laminated. It is possible to secure the airtightness between the storage unit 4 composed of -1, 4-2, 4-3, ..., 4-N. Then, by ensuring the airtightness of the discharge unit 8, even if an abnormality occurs in a part of the battery cells 6, the gas flowing through the discharge unit 8 does not affect the other battery cells 6.
  • the exterior member 26 By inserting the exterior member 26 into the fitting portion between the concave portion 50 and the convex portion 52, the bondability between the cell holders 4-1, 4-2, 4-3, ..., 4-N is improved. ..
  • a deformable valve member may be installed in the notch 38.
  • This valve member is made of a deformable material such as resin, and when the battery cell 6 is in a normal state, the opening portion of the notch 38 is closed, and the valve function portion 28 due to an abnormality in the battery cell 6 It is configured to follow the expansion and deformation and be crushed in the notch 38 to open the notch 38. According to such a configuration, the airtightness between the exhaust area 36 formed by the ribs 34 and 46 and the storage portion 4 can be improved.
  • the opening shape of the notch 38 formed in the ribs 34 and 46 is circular or semicircular diameter or a shape close to it and the opening width is constant is shown. Not exclusively.
  • the cutout portion 38 may have a different opening width from the storage portion 4 toward the exhaust area 36, or may have an opening in a shape other than a circular shape or a semi-circular shape.
  • the cell holders 4-1, 4-2, 4-3, ..., 4-N have, for example, the top surface portions of the ribs 34 and 46, as well as the mounting portion 33 and the joint portion 43 forming the storage portion 4. May also be provided with a recess 50 or a protrusion 52.
  • one cell holder 4-1, 4-2, 4-3, ..., 4-N is provided with a rib 34 on the storage surface 16 side and a rib 34 on the mounting surface 32 side.
  • the case where the 46 is provided is shown, but the present invention is not limited to this.
  • the cell holders 4-1, 4-2, 4-3, ..., 4-N may have ribs erected from either one of the storage surface portion 16 and the mounting surface portion 32, for example.
  • the cell holders 4-1 and 4-2, 4-3, ... 4-2, 4-3, ..., 4-N are laminated.
  • Cell holders 4-1, 4-2, 4-3, ..., 4-N adjacent to the storage portion 4 are adjacent to the cell holders 4-1, 4-2, 4-3, 4-3.
  • a discharge portion is formed inside a storage portion for accommodating a battery cell, and a part of an exterior member including a discharge port of the battery cell is accommodated in this discharge portion to store gas generated in the battery cell. It is useful because the power supply unit can be made smaller and lighter by discharging it to the outside of the battery.
  • Power supply unit 4 Storage unit 4-1, 4-2, 4-3, ..., 4-N, 4- (X-1), 4-X, 4- (X + 1) Cell holder 6 Battery cell 8 Discharge Part 10 Cover case 12, 22 Gas vents 14-1A, 14-1B, 14-2A, 14-2B, ... Terminal part 16 Storage surface part 18 Gas discharge part 20 Gas discharge port 24 Power storage body 26 Exterior member 28 valve Functional part 30 Lid surface part 32 Mounting surface part 33 Mounting part 34, 46 Rib 36 Exhaust area 38 Notch part 40 Blocking surface part 42 Storage wall 43 Joint part 44 Derivation part 48 Derivation part 50 Concave part 52 Convex part

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Battery Mounting, Suspending (AREA)
  • Gas Exhaust Devices For Batteries (AREA)

Abstract

L'invention concerne une unité d'alimentation électrique qui est équipée : d'une section de stockage (4) pour stocker une cellule de stockage d'énergie (cellule de batterie 6) dans laquelle des éléments de stockage d'énergie (corps de stockage d'énergie (24)) recouvert par un élément externe (26) comportant un orifice d'évacuation de gaz (20) sont formés à l'intérieur d'un empilement d'une pluralité d'unités de compartiment empilées (supports de cellule 4-1, 4-2, 4-3... 4 -N) ; et une section d'évacuation (8) formée à l'intérieur d'une partie de la section de stockage et à travers laquelle le gaz qui a été évacué à travers l'orifice d'évacuation de gaz est évacué. Ainsi, une section de l'élément externe qui comprend l'orifice d'évacuation de gaz est positionnée dans ladite section d'évacuation. Par conséquent, il est possible de garantir une performance d'évacuation de gaz suffisante et de réduire la taille d'une unité d'alimentation électrique.
PCT/JP2020/030006 2019-09-30 2020-08-05 Unité d'alimentation électrique et son procédé de production WO2021065194A1 (fr)

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JP2019178228A JP2021057166A (ja) 2019-09-30 2019-09-30 電源ユニットおよびその製造方法

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120045672A1 (en) * 2010-08-23 2012-02-23 Delphi Technologies, Inc. Vented battery pack
WO2018160012A2 (fr) * 2017-03-03 2018-09-07 주식회사 엘지화학 Cartouche et module de batterie la comprenant
JP2018195745A (ja) * 2017-05-19 2018-12-06 株式会社フジクラ 蓄電モジュール
JP2019032992A (ja) * 2017-08-08 2019-02-28 トヨタ自動車株式会社 電池パック

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120045672A1 (en) * 2010-08-23 2012-02-23 Delphi Technologies, Inc. Vented battery pack
WO2018160012A2 (fr) * 2017-03-03 2018-09-07 주식회사 엘지화학 Cartouche et module de batterie la comprenant
JP2018195745A (ja) * 2017-05-19 2018-12-06 株式会社フジクラ 蓄電モジュール
JP2019032992A (ja) * 2017-08-08 2019-02-28 トヨタ自動車株式会社 電池パック

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