WO2024053278A1 - 電池パック - Google Patents
電池パック Download PDFInfo
- Publication number
- WO2024053278A1 WO2024053278A1 PCT/JP2023/027788 JP2023027788W WO2024053278A1 WO 2024053278 A1 WO2024053278 A1 WO 2024053278A1 JP 2023027788 W JP2023027788 W JP 2023027788W WO 2024053278 A1 WO2024053278 A1 WO 2024053278A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- gas
- battery pack
- secondary battery
- outer case
- battery
- 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
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Classifications
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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
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/35—Gas exhaust passages comprising elongated, tortuous or labyrinth-shaped exhaust passages
- H01M50/367—Internal gas exhaust passages forming part of the battery cover or case; Double cover vent systems
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6554—Rods or plates
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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
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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
-
- 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
- H01M50/213—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for cells having curved cross-section, e.g. round or elliptic
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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
- H01M50/218—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material
- H01M50/22—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material of the casings or racks
- H01M50/227—Organic material
-
- 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
- H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
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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
- H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
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- 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 disclosure relates to a battery pack.
- a plurality of secondary battery cells 701 are installed in an exterior case 710 as shown in the cross-sectional view of FIG. 14 so that the secondary batteries can be replaced.
- a stored battery pack is used.
- Electrical devices powered by battery packs include various devices such as electric carts and power tools.
- a discharge path 734 is defined in the exterior case 710 so that when gas is discharged from the exterior case 710 from any of the secondary battery cells, the gas can be safely discharged to the outside of the battery pack.
- the discharge path 734 was formed by a wall 735.
- the outer case 710 may be heated and melted by the accumulated combustion gas, and the combustion gas may leak out from the outer case 710.
- One object of the present disclosure is to provide a battery pack that can smoothly discharge high-temperature, high-pressure gas to the outside even if high-temperature, high-pressure gas should be discharged from a secondary battery cell inside the battery pack. .
- a battery pack according to one aspect of the present invention is a battery pack including a plurality of secondary battery cells and an exterior case that houses the plurality of secondary battery cells, wherein the exterior case has a portion of its surface.
- a gas exhaust hole is opened in the outer case, and the exterior case has a gas exhaust hole in the exterior case that guides the gas to the gas exhaust hole when gas is released from any of the plurality of secondary battery cells.
- a discharge guide defining a guide path is provided, and the discharge guide includes an inclined wall inclined from a position opposite to the direction in which the gas is discharged.
- the gas when high-temperature, high-pressure gas is discharged from any of the secondary battery cells, the gas collides with a part of the discharge guide, creating a vortex and stagnation. , can be avoided by using sloped walls to increase safety.
- FIG. 1 is a perspective view showing a battery pack according to Embodiment 1.
- FIG. FIG. 2 is a longitudinal cross-sectional view of the battery pack of FIG. 1 taken along line II-II. 2 is a cross-sectional view taken along line III-III of the battery pack of FIG. 1.
- FIG. FIG. 2 is an exploded perspective view of the battery pack of FIG. 1 with a label removed.
- FIG. 2 is an exploded perspective view of the outer case of the battery pack shown in FIG. 1;
- FIG. 6 is an exploded perspective view of the battery pack shown in FIG. 5 with the exterior case disassembled, as seen diagonally from below. 6 is an exploded perspective view of the battery module of FIG. 5.
- FIG. FIG. 5 is a longitudinal cross-sectional view of the battery pack of FIG. 1 taken along line II-II. 2 is a cross-sectional view taken along line III-III of the battery pack of FIG. 1.
- FIG. FIG. 2 is an exploded perspective view of the battery pack of FIG. 1 with
- FIG. 3 is a cross-sectional view showing a route for discharging high-pressure gas from the exterior case in the battery pack of FIG. 2;
- FIG. 7 is an exploded perspective view of the upper case of FIG. 6;
- 10 is an exploded perspective view showing a state in which the gas cooling plate is removed from the upper case of FIG. 9.
- FIG. FIG. 2 is a horizontal cross-sectional view of the battery pack of FIG. 1 taken along line XI-XI.
- FIG. 3 is an enlarged sectional view of a main part of the battery pack shown in FIG. 2;
- FIG. 10 is an enlarged perspective view of the upper case of FIG. 10;
- FIG. 3 is a cross-sectional view showing a battery pack according to a comparative example.
- 15 is an enlarged view of main parts of the battery pack of FIG. 14.
- Embodiments of the present invention may be specified by the following configurations and features.
- the inclined wall when the gas is discharged from any of the plurality of secondary battery cells, the inclined wall is arranged in a direction in which the gas is discharged. It has been extended into a crossing position.
- the inclined wall is integrally provided on the inner surface of the outer case.
- the gas guide path includes a pressure reduction structure that reduces the pressure of the high-pressure gas.
- the pressure reduction structure is installed in front of the gas exhaust hole inside the outer case.
- the inclined wall is formed at a stepped portion of the gas guide path formed by the pressure reduction structure.
- the outer case is formed to have an outer shape that is extended in one direction.
- the inclined wall is inclined along an extension direction of the outer case.
- the inclined wall is formed in a plurality of strips along the extending direction of the outer case.
- the inclined walls are formed in a staggered manner along the extension direction of the outer case.
- a battery pack according to another embodiment of the present invention further includes a battery holder that holds the plurality of secondary battery cells in any of the above embodiments.
- the gas guide path is formed in a region where one surface of the battery holder and an inner surface of the outer case face each other. .
- the outer case is made of resin.
- the inclined wall includes a curved surface.
- each element constituting the present invention may be configured so that a plurality of elements are made of the same member so that one member serves as a plurality of elements, or conversely, the function of one member may be performed by a plurality of members. It can also be accomplished by sharing.
- the battery pack of the present invention can be used as a power source for movable objects such as electric carts, electric scooters, and assisted bicycles, as a power source for portable electric devices such as radios, electric cleaners, and power tools, or as a power source for stationary electric devices. It can be used for power storage, as a backup power source for servers, as a power source for homes, offices, and factories, and as a driving power source for vehicles such as hybrid cars and electric cars.
- a battery pack used as a driving power source for an electric cart will be described.
- FIG. 1 is a perspective view showing the battery pack 100 according to Embodiment 1
- FIG. 2 is a longitudinal cross-sectional view of the battery pack 100 in FIG. 1 taken along the line II-II
- FIG. 4 is an exploded perspective view of the battery pack 100 in FIG. 1 with the label 40 removed
- FIG. 5 is an exploded perspective view of the battery pack 100 in FIG. 1 with the exterior case 10 disassembled
- FIG. 5 is an exploded perspective view of the exterior case 10 of the battery pack 100 shown in FIG. 5 viewed diagonally from below
- FIG. 7 is an exploded perspective view of the battery module 2 shown in FIG. 5.
- a battery pack 100 shown in these figures includes an exterior case 10, a battery module 2, and a circuit board 3. (Exterior case 10)
- the exterior case 10 houses the battery module 2 and the circuit board 3. As shown in FIGS. 1 and 4, this exterior case 10 has a box-shaped appearance.
- the exterior case 10 is divided into two parts, an upper case 11 and a lower case 12, as shown in FIGS. 2 to 3 and 5 to 6, for example.
- the exterior case 10 is preferably made of a material with excellent insulation properties, such as resin such as polycarbonate or PC-ABS alloy, but may also be made of a metal material such as aluminum or its alloy. Further, inside the exterior case 10, as shown in FIGS. 2 to 3, 5 to 6, etc., an internal space is provided to accommodate the battery module 2 and the circuit board 3. (Battery module 2)
- the battery module 2 is also called a core pack, and is composed of a plurality of battery blocks 20.
- the battery module 2 is composed of a first battery block 20A and a second battery block 20B.
- the first battery block 20A and the second battery block 20B each include a plurality of secondary battery cells 1.
- the plurality of secondary battery cells 1 are connected in series or in parallel via lead plates.
- the number of series connections and the number of parallel connections can be arbitrarily set according to required specifications.
- the first battery block 20A and the second battery block 20B use the same number of secondary battery cells 1. Further, it is preferable that the number of series connections and the number of parallel connections be the same between the first battery block 20A and the second battery block 20B.
- each battery block 20 uses a total of 90 secondary battery cells 1 arranged in a row of 9 and 10, but the configuration is not limited to this.
- Each battery block 20 includes a plurality of secondary battery cells 1.
- the battery block 20 includes a battery holder that houses the secondary battery cells 1.
- the battery holder is provided with a plurality of storage tubes that individually store the secondary battery cells 1.
- Such a battery holder can be made of resin such as polycarbonate, which has excellent insulation properties.
- each battery block 20 is configured with 90 secondary battery cells 1, but the number of secondary battery cells configuring each battery block is not limited to this, and may be any number. be able to. Further, the number of secondary battery cells may be changed in some battery blocks.
- the one or more secondary battery cells 1 may have a cylindrical or prismatic external shape. In the examples shown in FIGS. 2 to 3 and 7, cylindrical secondary battery cells 1 are used in a staggered arrangement in a vertical position. Note that the number and arrangement of the secondary battery cells 1 are not limited to this example, and any number and arrangement can be adopted as appropriate.
- Each secondary battery cell 1 has positive and negative electrodes, respectively. The positive and negative electrodes are preferably provided on one end surface of the secondary battery cell 1.
- any known secondary battery such as a lithium ion secondary battery, a nickel hydride battery, a nickel cadmium battery, etc. can be used as appropriate. (safety valve)
- the outer can of the secondary battery cell 1 is provided with a safety valve.
- the safety valve opens in response to an increase in the internal pressure of the outer can, and releases the gas inside the outer can to the outside. (Gas exhaust hole 13)
- the exterior case 10 has a gas discharge hole 13 for discharging high-pressure gas to the outside when the safety valve of the secondary battery cell 1 is opened and high-pressure gas is discharged, as shown in FIGS. 2 to 5. is formed in part.
- the gas exhaust hole 13 is formed in the label pasting area 13a where the label 40 is pasted, and the gas exhaust hole 13 is closed by pasting the label 40. Further, when high-temperature, high-pressure gas is injected from the gas exhaust hole 13, the label 10 that was blocking the gas exhaust hole 13 is broken by the pressure and heat of the gas, and the gas exhaust hole 13 is opened.
- the gas exhaust holes 13 are provided unevenly on one side of the top surface 14 of the exterior case 10. Furthermore, the gas discharge hole 13 is not limited to the top surface 14 of the exterior case 10, but may be provided on the bottom surface 15, side surface 16, or the like. Further, the gas exhaust holes 13 may be opened at a plurality of locations.
- the gas discharge hole 13 is designed according to the volume of the outer case 10, the battery capacity of the secondary battery cell 1, etc., and has a width of, for example, 12 mm. In the example shown in FIG. 4, the gas discharge hole 13 has a shape in which a circle is divided into four cross sections. This has the effect of preventing the central portion from being dented or damaged by external force when a thin label is pasted. (Label 40)
- the label 40 is adhered to the periphery of the gas exhaust hole 13 of the outer case 10 and is attached to the label attachment area 13a of the outer case 10.
- the label pasting area 13a is formed in a stepped portion that is one step lower than other areas of the exterior case 10 so as to be substantially flush with the surface of the label 20.
- the label 40 has information printed in advance on the specifications of the battery pack 100, such as the model number, manufacturer's name, battery capacity, and ratings.
- the label 40 is made of a resin such as polycarbonate or polypropylene, or is made of a paper base material impregnated or coated with a resin. Further, the thickness of the label 40 is, for example, 0.5 mm.
- the label 40 has a rectangular outer shape. In the example shown in FIG.
- the outer shape of the label 40 is a horizontally long rectangle with chamfered corners, but it is not limited to this shape, and may be a vertically long shape, a square shape, a polygonal shape such as an octagonal shape, or the like. (Double-sided tape 30)
- the back side of the label 40 has an adhesive surface at least partially.
- double-sided tape 30 is attached around the label 40 to attach the adhesive surface to the label 40.
- the double-sided tape 30 is a member for fixing the label 40 in a position that closes the gas exhaust hole 13.
- an adhesive or the like may be used to adhere the label 40.
- a second label 42 is attached to an area on the upper surface of the exterior case 10 that is lined up with the label 40. Further, the upper case 11 is provided with a second label pasting area 13b on which a second label 42 is pasted. A checkerboard-shaped slit is formed in the second label pasting area 13b to prevent air bubbles from entering when the second label 42 is pasted. (Circuit board 3)
- Each first battery block 20A and second battery block 20B is connected to the circuit board 3 via a lead plate.
- the circuit board 3 is equipped with a charging/discharging circuit that charges and discharges the secondary battery cell 1, a protection circuit that monitors the voltage and temperature of the secondary battery cell 1, and cuts off the current in the event of an abnormality.
- the circuit board 3 is made of a glass epoxy board or the like. (Spacer 30)
- a spacer 30 is interposed between the first battery block 20A and the second battery block 20B.
- the spacer 30 is made of a material with excellent insulation properties, for example, a resin such as polycarbonate or PC-ABS alloy. (Partition plate 32)
- the spacer 30 includes a partition plate 32 that partitions a first space 31A facing the first battery block 20A and a second space 31B facing the second battery block 20B.
- the partition plate 32 is preferably formed so that the height of the first space 31A and the height of the second space 31B are approximately equal. This partition plate 32 is preferably formed integrally with the spacer 30. (Gas guide route 34)
- the exterior case 10 defines a gas guide path 34 inside thereof.
- the gas guide path 34 guides the gas to the gas discharge hole 13 in the event that gas is released from any of the secondary battery cells 1 .
- the gas guide path 34 includes a first space 31A and a second space 31B formed between the first battery block 20A and the second battery block 20B, and the bottom surface of the second battery block 20B. and the inner surface of the bottom surface 15 of the lower case 12, and the third space 31C formed between the top surface of the first battery block 20A and the circuit board 3 disposed on the inner surface of the top surface 14 of the upper case 11.
- the outer case 10 includes a fourth space 31D, each of which extends across the interior along the longitudinal direction of the outer case 10.
- first space 31A, second space 31B, third space 31C, and fourth space 31D are located on one side of the width direction of the exterior case 10 (the upper and lower sides of the left side surface 16 in FIG. 8). direction) and communicates with a fifth space 31E extending in the direction.
- the fifth space 31E communicates with a sixth space 31F formed on the inner surface of the top surface 14 of the exterior case 10.
- the sixth space 31F extends along the longitudinal direction on the back side of the upper case 11 to the gas discharge hole 13.
- the gas when high-temperature, high-pressure gas is discharged from any of the secondary battery cells 1, the gas is discharged from the secondary battery cell 1 according to its discharge position, that is, the position of the safety valve provided in the secondary battery cell.
- the gas is discharged into one of the first space 31A, the second space 31B, the third space 31C, and the fourth space 31D, and is guided through the fifth space 31E to the sixth space 31F, and finally from the gas discharge hole 13 to the outer case 10. It is discharged to the outside.
- the fifth space 31E is provided on the left side of the inner surface of the outer case in FIG. 8, but the present disclosure is not limited to this structure, and a gas guide path may also be formed separately on the right side of the inner surface of the outer case. You may.
- each secondary battery cell 1 constituting the first battery block 20A and each end face of the secondary battery cell 1 constituting the second battery block 20B are arranged in a posture facing each other with the spacer 30 interposed therebetween. It is desirable that Further, a safety valve is provided on one of the end faces of the secondary battery cells 1 of the first battery block 20A and the end faces of the secondary battery cells 1 of the second battery block 20B, which are in opposing positions with the spacer 30 interposed therebetween. It is desirable to be present. For example, it is desirable that one of the opposing end faces of the secondary battery cells of the first battery block 20A and the end faces of the secondary battery cells of the second battery block 20B be a positive electrode and the other be a negative electrode.
- a safety valve is provided on either the positive electrode or the negative electrode, so by placing the safety valve only on either side of the surface where the electrodes face each other, situations where high temperature and high pressure gas is ejected from both end surfaces can be eliminated. and ensure safety.
- a gas cooling structure can be added in the middle of the gas guide path 34 to cool the high temperature gas.
- a first cooling plate 51, a second cooling plate 52, and an insulating plate 53 are fixed to the inner surface of the upper case 11 as a gas cooling structure.
- the first cooling plate 51 and the second cooling plate 52 are made of a material with excellent thermal conductivity and heat resistance, for example, metal such as aluminum.
- the insulating plate 53 is made of a material with excellent insulation and heat resistance, such as a sheet material such as mica or Nomex (registered trademark).
- the second cooling plate 52 and the insulating plate 53 are overlapped and adhered to each other to provide insulation between the circuit board 3 and the circuit board 3 provided at a distance from the lower surface of the insulating plate 53.
- the second cooling plate 52 and the first cooling plate 51 are spaced apart from each other, and a gas guide path 34 for guiding high-temperature gas is constructed between them.
- a spacer may be provided to separate the first cooling plate 51 and the second cooling plate 52.
- a nut may be interposed when the first cooling plate 51 and the second cooling plate 52 are screwed together.
- a cushioning material 54 is interposed to separate the second cooling plate 52 from the inner surface of the upper case 11.
- the cushion material 54 is formed in an annular shape along the contour of the second cooling plate 52.
- Such cushioning material 54 can be made of urethane, rubber, silicone, or the like.
- a cushion guide wall 17 for holding the cushion material 54 is formed on the inner surface of the top surface 14 of the upper case 11.
- the cushion guide wall 17 is integrally formed on the inner surface of the upper case 11.
- the cushion guide wall 17 can be made of resin such as polycarbonate or PC-ABS alloy.
- the first cooling plate 51 is formed in a size that overlaps a part of the second cooling plate 52. In other words, the first cooling plate 51 is formed smaller than the second cooling plate 52. This is because a labyrinth structure, which will be described later, is provided adjacent to the first cooling plate 51.
- the first cooling plate 51 may be formed to have the same size as the second cooling plate 52.
- the labyrinth structure may be omitted, or the labyrinth structure may be provided on the surface of the first cooling plate. (Pressure reduction structure)
- a pressure reduction structure for reducing the pressure of high-pressure gas may be added in the middle of the gas guide path 34.
- the pressure reduction structure and the gas cooling structure may be integrated.
- an opening area 53a is provided in a part of the insulating plate 53, and a hole area in which a large number of holes are opened in the second cooling plate 52 at positions corresponding to the opening area 53a of the insulating plate 53. 52a is provided.
- a punched metal in which hole regions 52a are formed by punching can be used for the second cooling plate 52. As shown in the sectional view of FIG.
- the pressure reduction structure of this structure allows the high temperature and high pressure gas guided to the sixth space 31F to be exposed through the opening area 53a of the insulating plate 53 through the hole in the second cooling plate 52. It is made to pass through the area 52a. The pressure of the high pressure gas is reduced due to the resistance when passing through the hole region 52a. In addition, by passing through the hole area 52a of the second metal cooling plate 52, heat is also removed and the temperature is lowered. In this manner, the hole area 52a of the second cooling plate 52 functions as a pressure reduction structure and also functions as a gas cooling structure. (Labyrinth structure)
- a labyrinth structure that inhibits the advance of high-pressure gas may be added.
- an inhibition wall 60 is formed adjacent to the first cooling plate 51 as a labyrinth structure.
- the obstruction wall 60 is provided in a posture intersecting the longitudinal direction of the exterior case 10, which is the traveling direction of high-pressure gas. It is preferable that a plurality of inhibiting walls 60 are provided in multiple stages.
- the obstruction wall 60 does not completely block the gas in the traveling direction, but by providing a passage area 64 that is partially open, the obstruction wall 60 guides the gas to the passage area 64 and ultimately allows the gas to pass through the passage area 64. This realizes guidance to the discharge hole 13.
- the passage areas 64 are arranged in a discontinuous manner, such as in a staggered pattern, instead of making them continuous in the longitudinal direction, the progress of the gas is obstructed each time, the momentum of the gas is gradually reduced, and the pressure is lowered. It can be guided to the discharge hole 13.
- the inhibiting walls 60 are provided in multiple stages as described above, it is preferable to form them in a staggered manner along the extension direction of the exterior case 10.
- the first inhibiting wall 61 is arranged at the center of the sixth space 31F in the width direction with respect to the gas that has been guided to the sixth space 31F and passed through the first cooling plate 51,
- the left and right sides of the first obstruction wall 61 are defined as passage areas 64.
- the high-pressure gas is branched left and right at the first inhibiting wall 61 .
- the second blocking walls 62 in the second stage that follow are arranged at both ends of the sixth space 31F in the width direction, and have a passage area 64 in the center.
- the high-pressure gas that has been once branched to the left and right is concentrated again in the center, and passes through the passage area 64 in a state where the high-pressure gases collide with each other to reduce the pressure.
- the third inhibition wall 63 of the third stage is again arranged at the center in the width direction of the sixth space 31F, with the left and right serving as passage areas 64.
- the high-pressure gas is again branched left and right, passed through, and its pressure is further reduced.
- the inhibiting walls 60 in multiple stages alternately in the longitudinal direction of the exterior case 10, which is the main direction of gas movement, the gas is bent left and right and proceeds in a meandering manner, thereby reducing the pressure.
- the gas is then discharged from the exterior case 10 through the gas discharge hole 13 while significantly reducing the amount of gas. (Discharge guide 6)
- a portion of such gas guide path 34 is defined by the discharge guide 6.
- the discharge guide 6 that defines the sixth space 31F in the gas guide path 34 is fixed to the inner surface of the upper case 11.
- the discharge guide 6 is integrally formed on the inner surface of the upper case 11.
- the discharge guide 6 is not limited to this configuration, and may be configured as a separate member from the upper case, for example. Further, the ejection guide may be provided on another member such as the upper surface of the circuit board. (Slope wall 18)
- the discharge guide 6 includes an inclined wall 18 that is inclined from a position opposite to the gas discharge direction.
- an inclined wall 18 is formed on the inner surface of the upper case 11 in front of the cushion guide wall 17.
- the discharge guide 6 is provided with a stepped portion 19 as a pressure reducing structure formed on the inner surface of the top surface 14 of the upper case 11 of the outer case 10, and this stepped portion 19 is provided with an inclined wall 18. You can also capture it.
- a wall is provided between the top surface of the battery module 702 and the inner surface of the top surface 714 of the upper case 711 in order to define the discharge path 734.
- This wall is made of resin, like the exterior case 710.
- a case will be considered in which one of the secondary battery cells 701 opens the safety valve due to thermal runaway or the like, and high-temperature, high-pressure gas is spouted into the exterior case 710.
- High-temperature, high-pressure gas When high-temperature, high-pressure gas is guided along the exhaust path 734 inside the exterior case 710, if the high-temperature, high-pressure gas collides with the wall with force, the gas may generate a vortex VX and remain at high temperature.
- the inventor of the present application has discovered this.
- High-temperature, high-pressure gas can ignite combustible materials and cause flames, and when the exterior case 710 is locally melted by the accumulated combustion gas, it is ruptured, and the combustion gas leaks to the outside of the exterior case 710. , there is a possibility of fire leakage.
- the inventors of the present application found a structure that makes it difficult for gas to stagnate, that is, a structure that makes it difficult for gas vortices to occur while guiding the gas to a desired route, and has developed a battery pack according to the present embodiment. It was accomplished. Specifically, it has been found that vortices are more likely to occur when the wall is perpendicular to the direction of gas travel. Therefore, in the discharge guide 6 that defines the gas guide path 34, in areas where thinning is likely to occur or in areas close to the surface of the exterior case 10, walls are not provided at right angles to the gas traveling direction. It has been found that by forming the inclined wall 18 that is inclined along the traveling direction, it is possible to reduce the risk of vortex generation without impeding the progress of the gas, and to suppress leakage of fire due to local heating and melting.
- the gas guide path 34 When constructing the gas guide path 34 within the exterior case 10, it is desirable to suppress the pressure and temperature of the gas to some extent at the stage of discharging the gas to the outside of the exterior case 10. Therefore, it is desirable to allow the gas ejected from the safety valve inside the exterior case 10 to travel a certain distance inside the exterior case 10 and reduce its momentum during that time. Therefore, when the outer case 10 has a long outer shape in one direction, it is preferable to construct the gas guide path 34 along the longitudinal direction of the outer case 10 to increase the travel distance of the gas. Therefore, since the gas guiding direction is along the extending direction of the outer case 10, it is preferable that the inclined wall 18 be inclined along the extending direction of the outer case 10.
- the inclined wall 18 is not limited to one location, but may be formed in a plurality of strips along the extending direction of the exterior case 10.
- the inclined wall 18 is provided on the discharge guide 6 which is extended in a posture intersecting the gas discharge direction in plan view. If gas collides with intersecting walls, there is a high possibility that a vortex will be generated, so by providing the inclined wall 18 on such a surface, the risk of gas retention can be reduced.
- an inclined wall may be provided in front of the first inhibiting wall 61, the second inhibiting wall 62, and the third inhibiting wall 63 of the labyrinth structure described above.
- the risk of vortex generation is also reduced, so in the area near the gas exhaust hole 13, even if the wall crosses the gas exhaust direction, It is not necessary to provide a sloped wall.
- the inclined wall 18 does not necessarily have to be flat, and may include a curved surface.
- the slanted wall 18 also includes a state in which the slanted surface is curved.
- the battery pack is attached to an electrical device to be driven, and power is supplied to the electrical device.
- the battery pack can be replaced and the electrical device can be used continuously.
- the present invention is not limited to a replaceable battery pack that mainly houses secondary battery cells, but can also be applied to an embodiment in which secondary battery cells are housed within the casing of an electrical device.
- a battery pack is sufficient if a secondary battery cell is housed in a case, and includes a battery pack that has a driving secondary battery cell built into the casing of an electrical device itself. That is, the present invention is not limited to replaceable battery packs, but can also be applied to electrical equipment incorporating secondary battery cells.
- the battery pack according to the present invention can be suitably used as a driving power source for moving objects such as electric carts and electric scooters. It can also be used as a power source for radio equipment, or as a power source for portable electric devices such as electric cleaners and power tools.
- Gas guide path 40 Label 51 ... First cooling plate 52 ... Second cooling plate: 52a ... Hole region 53 ... Insulation plate; 53a ... Opening region 54 ... Cushion material 60 ... Obstruction wall 61 ... First inhibition wall 62 ... Second inhibition wall 63 ... Third obstruction wall 64... Passage area 701... Secondary battery cell 702... Battery module 710... Exterior case 711... Upper case 714... Top surface of upper case 734... Ejection route 735... Wall VX... Vortex
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Battery Mounting, Suspending (AREA)
- Gas Exhaust Devices For Batteries (AREA)
Abstract
Description
[実施形態1]
(外装ケース10)
(電池モジュール2)
(二次電池セル1)
(安全弁)
(ガス排出穴13)
(ラベル40)
(両面テープ30)
(回路基板3)
(スペーサ30)
(仕切り板32)
(ガス案内経路34)
(ガス冷却構造)
(圧力低減構造)
(ラビリンス構造)
(排出ガイド6)
(傾斜壁18)
1…二次電池セル
1…二次電池セル
2…電池モジュール
3…回路基板
6…排出ガイド
10…外装ケース
11…上ケース
12…下ケース
13…ガス排出穴;13a…ラベル貼付領域:13b…第二ラベル貼付領域
14…天面
15…底面
16…側面
17…クッションガイド壁
18…傾斜壁
19…段差部
20…電池ブロック;20A…第一電池ブロック;20B…第二電池ブロック
30…スペーサ
31A…第一空間;31B…第二空間;31C…第三空間;31D…第四空間;31E…第五空間;31F…第六空間
32…仕切り板
34…ガス案内経路
40…ラベル
51…第一冷却プレート
52…第二冷却プレート:52a…穴領域
53…絶縁プレート;53a…開口領域
54…クッション材
60…阻害壁
61…第一阻害壁
62…第二阻害壁
63…第三阻害壁
64…通過領域
701…二次電池セル
702…電池モジュール
710…外装ケース
711…上ケース
714…上ケースの天面
734…排出経路
735…壁
VX…渦
Claims (10)
- 複数の二次電池セルと、
前記複数の二次電池セルを収納する外装ケースと、
を備える電池パックであって、
前記外装ケースは、その表面の一部にガス排気穴を開口しており、
前記外装ケースは、その内部において、前記複数の二次電池セルのいずれかからガスが放出された際に、当該ガスを前記ガス排気穴に案内するガス案内経路を規定する排出ガイドを備えており、
前記排出ガイドは、当該ガスの排出方向に対して対向する姿勢から傾斜された傾斜壁を含んでなる電池パック。 - 請求項1に記載の電池パックであって、
前記傾斜壁が、平面視において、前記複数の二次電池セルのいずれかからガスが放出された際に、当該ガスの排出方向に対して交差する姿勢に延長されてなる電池パック。 - 請求項2に記載の電池パックであって、
前記外装ケースの内面に、前記傾斜壁を一体に設けてなる電池パック。 - 請求項1に記載の電池パックであって、
前記ガス案内経路は、高圧のガスの圧力を低減させる圧力低減構造を備え、
前記圧力低減構造は、前記外装ケースの内部の前記ガス排気穴の手前に設置され、
前記傾斜壁は、前記圧力低減構造により形成される前記ガス案内経路の段差部に形成されてなる電池パック。 - 請求項4に記載の電池パックであって、
前記外装ケースが一方向に延長された外形に形成されており、
前記傾斜壁が、前記外装ケースの延長方向に沿って傾斜されてなる電池パック。 - 請求項5に記載の電池パックであって、
前記傾斜壁が、前記外装ケースの延長方向に沿って複数条に形成されてなる電池パック。 - 請求項6に記載の電池パックであって、
前記傾斜壁が、前記外装ケースの延長方向に沿って千鳥状に形成されてなる電池パック。 - 請求項1~7のいずれか一項に記載の電池パックであって、さらに、
前記複数の二次電池セルを保持する電池ホルダを備えており、
前記電池ホルダの一面と、前記外装ケースの内面とが対向する領域に、前記ガス案内経路が形成されてなる電池パック。 - 請求項1~7のいずれか一項に記載の電池パックであって、
前記外装ケースは、樹脂製である電池パック。 - 請求項1~7のいずれか一項に記載の電池パックであって、
前記傾斜壁は、湾曲面を含んでなる電池パック。
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2024545488A JPWO2024053278A1 (ja) | 2022-09-07 | 2023-07-28 | |
| CN202380059144.1A CN119856334A (zh) | 2022-09-07 | 2023-07-28 | 电池组 |
| EP23862821.8A EP4586385A4 (en) | 2022-09-07 | 2023-07-28 | BATTERY PACK |
| US19/107,028 US20260058299A1 (en) | 2022-09-07 | 2023-07-28 | Battery pack |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2022142094 | 2022-09-07 | ||
| JP2022-142094 | 2022-09-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2024053278A1 true WO2024053278A1 (ja) | 2024-03-14 |
Family
ID=90192440
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2023/027788 Ceased WO2024053278A1 (ja) | 2022-09-07 | 2023-07-28 | 電池パック |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20260058299A1 (ja) |
| EP (1) | EP4586385A4 (ja) |
| JP (1) | JPWO2024053278A1 (ja) |
| CN (1) | CN119856334A (ja) |
| TW (1) | TW202427847A (ja) |
| WO (1) | WO2024053278A1 (ja) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007039999A1 (ja) * | 2005-09-30 | 2007-04-12 | Densei-Lambda Kabushiki Kaisha | 電池パック |
| JP2013084558A (ja) | 2011-10-10 | 2013-05-09 | Samsung Sdi Co Ltd | バッテリパック |
| WO2016136193A1 (ja) * | 2015-02-25 | 2016-09-01 | パナソニックIpマネジメント株式会社 | 電池モジュール |
| JP2018527704A (ja) * | 2015-10-15 | 2018-09-20 | エルジー・ケム・リミテッド | バッテリーパック |
| WO2019176415A1 (ja) * | 2018-03-12 | 2019-09-19 | パナソニックIpマネジメント株式会社 | 電池パック用排気ダクトおよび電池パック |
| WO2020166501A1 (ja) * | 2019-02-15 | 2020-08-20 | 三洋電機株式会社 | 電源装置 |
| JP2023539231A (ja) * | 2021-06-17 | 2023-09-13 | エルジー エナジー ソリューション リミテッド | バッテリーモジュール、それを含むバッテリーパック及び自動車 |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE8430246U1 (de) * | 1984-10-15 | 1985-01-24 | Accumulatorenwerke Hoppecke Carl Zoellner & Sohn GmbH & Co KG, 5790 Brilon | Bleiakkumulator |
| US5424146A (en) * | 1994-10-11 | 1995-06-13 | Cheng Kwang Storage Battery Co., Ltd. | Storage battery with a battery housing that provides protection against leakage |
| JP2015135763A (ja) * | 2014-01-17 | 2015-07-27 | トヨタ自動車株式会社 | 蓄電装置 |
| JP7589444B2 (ja) * | 2020-03-27 | 2024-11-26 | 株式会社Gsユアサ | 蓄電装置 |
-
2023
- 2023-07-28 JP JP2024545488A patent/JPWO2024053278A1/ja active Pending
- 2023-07-28 CN CN202380059144.1A patent/CN119856334A/zh active Pending
- 2023-07-28 EP EP23862821.8A patent/EP4586385A4/en active Pending
- 2023-07-28 WO PCT/JP2023/027788 patent/WO2024053278A1/ja not_active Ceased
- 2023-07-28 US US19/107,028 patent/US20260058299A1/en active Pending
- 2023-08-11 TW TW112130309A patent/TW202427847A/zh unknown
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007039999A1 (ja) * | 2005-09-30 | 2007-04-12 | Densei-Lambda Kabushiki Kaisha | 電池パック |
| JP2013084558A (ja) | 2011-10-10 | 2013-05-09 | Samsung Sdi Co Ltd | バッテリパック |
| WO2016136193A1 (ja) * | 2015-02-25 | 2016-09-01 | パナソニックIpマネジメント株式会社 | 電池モジュール |
| JP2018527704A (ja) * | 2015-10-15 | 2018-09-20 | エルジー・ケム・リミテッド | バッテリーパック |
| WO2019176415A1 (ja) * | 2018-03-12 | 2019-09-19 | パナソニックIpマネジメント株式会社 | 電池パック用排気ダクトおよび電池パック |
| WO2020166501A1 (ja) * | 2019-02-15 | 2020-08-20 | 三洋電機株式会社 | 電源装置 |
| JP2023539231A (ja) * | 2021-06-17 | 2023-09-13 | エルジー エナジー ソリューション リミテッド | バッテリーモジュール、それを含むバッテリーパック及び自動車 |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP4586385A4 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPWO2024053278A1 (ja) | 2024-03-14 |
| EP4586385A1 (en) | 2025-07-16 |
| US20260058299A1 (en) | 2026-02-26 |
| EP4586385A4 (en) | 2026-03-18 |
| TW202427847A (zh) | 2024-07-01 |
| CN119856334A (zh) | 2025-04-18 |
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