WO2024098248A1 - 电化学装置及用电设备 - Google Patents

电化学装置及用电设备 Download PDF

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Publication number
WO2024098248A1
WO2024098248A1 PCT/CN2022/130599 CN2022130599W WO2024098248A1 WO 2024098248 A1 WO2024098248 A1 WO 2024098248A1 CN 2022130599 W CN2022130599 W CN 2022130599W WO 2024098248 A1 WO2024098248 A1 WO 2024098248A1
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WO
WIPO (PCT)
Prior art keywords
battery cell
electrochemical device
along
wall
bottom plate
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/CN2022/130599
Other languages
English (en)
French (fr)
Inventor
农文彬
李坤龙
王鹏飞
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.)
Xiamen Ampack Technology Ltd
Original Assignee
Xiamen Ampack Technology 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 Xiamen Ampack Technology Ltd filed Critical Xiamen Ampack Technology Ltd
Priority to CN202280099694.1A priority Critical patent/CN119790532A/zh
Priority to PCT/CN2022/130599 priority patent/WO2024098248A1/zh
Publication of WO2024098248A1 publication Critical patent/WO2024098248A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
    • H01M50/242—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries against vibrations, collision impact or swelling
    • 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing

Definitions

  • the present application relates to the field of energy storage technology, and in particular to an electrochemical device and electrical equipment.
  • the battery cells will expand during use, and it is necessary to apply pressure to the battery cells when the battery cells expand in order to increase the service life of the electrochemical device.
  • An embodiment of the present application provides an electrochemical device, including a housing, a first battery cell assembly and at least one first structural member, the housing including a first space, at least part of the first battery cell assembly being disposed in the first space.
  • the first battery cell assembly includes a plurality of first battery cells, and the plurality of first battery cells are stacked along a first direction.
  • the first structural member and the first battery cell assembly are arranged in an arranged manner along a first direction, the first structural member includes a first bottom plate, two first side plates connected to the first bottom plate, the two first side plates are spaced apart along a second direction, the second direction is perpendicular to the first direction, and the two first side plates are fixedly connected to the housing.
  • the first structural member is disposed on one side of the first battery cell assembly along the first direction, and the first bottom plate provides expansion space for the first battery cell assembly, which can apply pressure to the first battery cell and increase the life of the first battery cell assembly.
  • the shell includes a first wall, a second wall, a third wall and a fourth wall, the first wall and the second wall are spaced apart along the second direction, the third wall and the fourth wall are spaced apart along the third direction, and the third direction is perpendicular to both the first direction and the second direction; one of the two first side panels is fixedly connected to the first wall, the other of the two first side panels is fixedly connected to the second wall, and/or one of the two first side panels is fixedly connected to the third wall, the other of the two first side panels is fixedly connected to the fourth wall.
  • the first structural member is fixedly connected to the shell through the two first side panels, and when the first battery cell assembly expands, the first battery cell assembly squeezes the first bottom plate, causing the first bottom plate to deform, and the first bottom plate applies pressure to the first battery cell assembly.
  • the shell further includes a fifth wall.
  • the fifth wall is disposed on a side of the first structural member away from the first battery cell assembly, which is beneficial to improving the stability of the first structural member connected to the shell.
  • the electrochemical device includes two first structural members, the housing further includes a sixth wall, and the sixth wall and the fifth wall are spaced apart along the first direction; along the first direction, the fifth wall is disposed on a side of one of the first structural members away from the first battery cell assembly, and the sixth wall is disposed on a side of the other first structural member away from the first battery cell assembly.
  • the two first structural members can cooperate to apply pressure to the first battery cell assembly, further improving the life of the first battery cell assembly.
  • one of the two first side panels is fixedly connected to the first wall and the fifth wall, and the other first side panel is fixedly connected to the second wall and the fifth wall, which is beneficial to improving the stability of the first structural member connecting the shell.
  • the first distance d1 can provide a deformation space, reduce the influence of the deformation of the first bottom plate on the shell, and reduce the influence on the outer shape of the electrochemical device.
  • the number of the first structural member is one, d1 ⁇ n*d0*16%, where n is the number of first cells in the first cell assembly, and d0 is the length of each first cell along the first direction.
  • n is the number of first cells in the first cell assembly
  • d0 is the length of each first cell along the first direction.
  • the number of first structural members is two, and the two first structural members are respectively arranged on both sides of the first battery cell assembly along the first direction, and are both connected to the shell, and d1 ⁇ n*d0*8%.
  • the first battery cell assembly squeezes the first bottom plates on both sides, so that the deformation of the two first bottom plates does not exceed the first distance d1, which can reduce the influence of the deformation of the first bottom plate on the shell, and reduce the influence on the outer shape of the electrochemical device.
  • the first structural member further includes two first protrusions provided on the first bottom plate, the two first protrusions are located between the two first side plates, and are spaced apart along the second direction.
  • the two first protrusions can absorb part of the pulling force generated by the deformation of the first bottom plate, which is beneficial to reducing the influence of the deformation of the first bottom plate on the two first side plates, and is also beneficial to enhancing the structural rigidity of the first bottom plate and improving the ability of the first bottom plate to resist deformation.
  • the first structural member further includes a first through hole and a second through hole provided on the first bottom plate, the first through hole and the second through hole being located between the two first protrusions.
  • the first through hole and the second through hole are conducive to weakening the structural rigidity of the first bottom plate and facilitating the expansion of the first battery cell assembly.
  • the first battery cell includes a first battery cell shell, a first electrode assembly, and a first electrode terminal connected to the first electrode assembly and extending from the first battery cell shell; along the first direction, the projections of the first electrode assembly and the two first protrusions are separated, which is conducive to promoting uniform expansion of the first battery cell assembly.
  • the first battery cell includes a first battery cell shell, a first electrode assembly, and a first electrode terminal connected to the first electrode assembly and extending from the first battery cell shell; along the first direction, the projection of the first electrode assembly and the projection of the first through hole are separated, and the projection of the first electrode assembly and the projection of the second through hole are separated, which is conducive to promoting uniform expansion of the first battery cell assembly.
  • the first battery cell includes a first battery cell shell, a first electrode assembly, and a first electrode terminal connected to the first electrode assembly and extending from the first battery cell shell;
  • the electrochemical device also includes a first insulating member, the first insulating member is bonded to at least a portion of the first battery cell shell and at least a portion of the first electrode terminal extending outside the first battery cell shell.
  • the first insulating member covers a portion of the surface of the first electrode terminal and a portion of the surface of the third electrode terminal, and can play a supporting and protective role, reducing the risk of damage to the first electrode terminal and the third electrode terminal, and can also play an insulating role, reducing the risk of short circuits in adjacent electrode terminals.
  • the provision of the first insulating member is conducive to reducing the number of fillers for the first electrode terminal and the third electrode terminal area, saving the cost of the electrochemical device.
  • the first insulating member covers at least a portion of the surface of the first shell, which is conducive to protecting the first shell and reducing the risk of damage to the first shell by foreign objects.
  • the projection of the first electrode assembly in the first direction, is separated from the projection of the first insulating member, which is beneficial to improving the uniform expansion of the first electrode assembly and reducing the impact of the expansion of the first electrode assembly on the first electrode terminal and the third electrode terminal.
  • the projection of the first insulating member in the first direction, is located within the projection of the first bottom plate.
  • the first bottom plate applies pressure to the first insulating member and the first shell, which helps to reduce the effect of the deformation of the first shell on the pulling of the first insulating member, and reduce the effect of the deformation of the first shell pulling the first insulating member on the first electrode terminal and the third electrode terminal.
  • the first structural member further includes two second side panels connected to the first bottom plate, the two second side panels are spaced apart along a third direction, and the third direction is perpendicular to both the first direction and the second direction.
  • the second side panels are conducive to enhancing the structural rigidity of the first bottom plate and improving the ability of the first bottom plate to resist deformation.
  • the two first side panels and the two second side panels are projected away from each other.
  • the damaged side panel is separated from the other side panels, which can reduce the impact on the other side panels.
  • a third through hole is provided at the connection between the second side plate and the first bottom plate, which is beneficial to weaken the structural rigidity of the first bottom plate and enhance the uniform expansion of the first battery cell assembly.
  • the first structural member also includes two first protrusions arranged on the first bottom plate, the two first protrusions are located between the two first side plates and are spaced apart along the second direction; the first structural member has a first area, and the first area is located between the two first protrusions; a third through hole is provided at the connection between the second side plate and the first bottom plate, and the projection of the third through hole is separated from the projection of the first area, which is conducive to promoting uniform expansion of the first battery cell assembly.
  • the electrochemical device also includes a second battery cell assembly, at least a portion of which is disposed in the first space and is arranged along the second direction with the first battery cell assembly, the second battery cell assembly includes a plurality of second battery cells, and the plurality of second battery cells are stacked along the first direction; along the first direction, the first structural member and the second battery cell assembly are arranged.
  • the first structural member also includes two first protrusions provided on the first bottom plate, the two first protrusions are located between the two first side plates and are spaced apart along the second direction;
  • the second battery cell includes a second battery cell shell, a second electrode assembly, and a second electrode terminal connected to the second electrode assembly and extending from the second battery cell shell; along the first direction, the projections of the second electrode assembly and the two first protrusions are separated, which is conducive to promoting uniform expansion of the second battery cell assembly 6.
  • the first structural member also includes a first through hole and a second through hole provided on the first base plate, and the first through hole and the second through hole are located between the two first protrusions; along the first direction, the projection of the second electrode assembly is separated from the projection of the first through hole, and the projection of the second electrode assembly is separated from the projection of the second through hole, which is conducive to promoting the uniform expansion of the second battery cell assembly.
  • the second battery cell includes a second battery cell shell, a second electrode assembly, and a second electrode terminal connected to the second electrode assembly and extending from the second battery cell shell;
  • the electrochemical device also includes a second insulating member, and the second insulating member covers at least a portion of the second battery cell shell and at least a portion of the second electrode terminal.
  • the second insulating member covers a portion of the surface of the second electrode terminal and a portion of the surface of the fourth electrode terminal, and can play a supporting and protective role, reducing the risk of damage to the second electrode terminal and the fourth electrode terminal, and can also play an insulating role, reducing the risk of short circuits in adjacent electrode terminals.
  • the provision of the second insulating member is conducive to reducing the number of fillers for the second electrode terminal and the fourth electrode terminal area, saving the cost of the electrochemical device.
  • the second insulating member covers at least a portion of the surface of the second shell, which is conducive to protecting the second shell and reducing the risk of damage to the second shell by foreign objects.
  • the projection of the second electrode assembly in the first direction, is separated from the projection of the second insulating member, which is beneficial to improving the uniform expansion of the second electrode assembly and reducing the impact of the expansion of the second electrode assembly on the second electrode terminal and the fourth electrode terminal.
  • the projection of the second insulating member overlaps with the projection of the first bottom plate.
  • the first bottom plate applies pressure to the second insulating member and the second shell, which helps to reduce the effect of the deformation of the second shell on the pulling of the second insulating member, and reduce the effect of the deformation of the second shell pulling the second insulating member on the second electrode terminal and the fourth electrode terminal.
  • the first structural member also includes a second protrusion, which is disposed on the first bottom plate and located between the two first side plates.
  • the second protrusion is beneficial to enhancing the structural rigidity of the first bottom plate and improving the ability of the first bottom plate to resist deformation.
  • the first structural member has a first area and a second area, the first area is located between the second protrusion and one first side plate, and the second area is located between the second protrusion and another first side plate.
  • the projection of the first region at least partially overlaps with the projection of the first electrode assembly, which is beneficial to promoting uniform expansion of the first battery cell assembly.
  • the projection of the second region at least partially overlaps with the projection of the second electrode assembly, which is beneficial to promoting uniform expansion of the second battery cell assembly.
  • the first structural member is further provided with a fourth through hole and a fifth through hole, the fourth through hole is provided in the first region, and the fifth through hole is provided in the second region.
  • the fourth through hole and the fifth through hole are conducive to weakening the structural rigidity of the first bottom plate and reducing the ability of the first bottom plate to resist deformation.
  • the electrochemical device further comprises a first elastic member, which is disposed between the first bottom plate and the first battery cell assembly and connects the first bottom plate and the first battery cell assembly.
  • the first elastic member can play a protective role, reducing the wear effect of the first bottom plate on the adjacent first battery cell, and the first elastic member can also play a role of elastic buffer, cooperating with the first bottom plate to provide pressure for the first battery cell assembly when the first battery cell assembly expands and deforms.
  • At least two adjacent battery cells among the plurality of first battery cells are arranged in contact with each other.
  • An embodiment of the present application further provides an electrical equipment, comprising the electrochemical device described in any one of the above embodiments.
  • the electrochemical device applies pressure to the battery cell by providing the first structural member, thereby increasing the service life of the electrochemical device and reducing the impact of the service life of the electrochemical device on the electrical equipment.
  • FIG. 1 is a schematic diagram of the three-dimensional structure of an electrochemical device in one embodiment of the present application.
  • FIG. 2 is an exploded view of the electrochemical device shown in FIG. 1 .
  • FIG. 3 is a schematic diagram of the internal structure of the electrochemical device shown in FIG. 1 .
  • FIG. 4 is a schematic diagram of a three-dimensional structure of an extended embodiment of the electrochemical device shown in FIG. 1 .
  • FIG. 5 is an exploded view of the electrochemical device shown in FIG. 4 .
  • FIG. 6 is a schematic structural diagram of a first structural member in an embodiment of the present application.
  • FIG. 7 is a cross-sectional view of the first structural member in a third direction in one embodiment of the present application.
  • FIG. 8 is a schematic diagram of the structure of a first battery cell in an embodiment of the present application.
  • FIG. 9 is a schematic diagram of the structure of a first battery cell before packaging in an embodiment of the present application.
  • FIG. 10 is a schematic structural diagram of a partial structure of an electrochemical device along a first direction in one embodiment of the present application.
  • FIG. 11 is a schematic diagram of the three-dimensional structure of an extended embodiment of the electrochemical device shown in FIG. 1 .
  • FIG. 12 is an exploded view of the electrochemical device shown in FIG. 11 .
  • FIG. 13 is a schematic diagram of the internal structure of the electrochemical device shown in FIG. 11 .
  • FIG. 14 is a schematic diagram of the structure of a second battery cell in an embodiment of the present application.
  • FIG. 15 is a schematic diagram of the structure of the second battery cell before packaging in one embodiment of the present application.
  • FIG. 16 is a schematic structural diagram of a first structural member in an embodiment of the present application.
  • FIG. 17 is a schematic structural diagram of a partial structure of an electrochemical device along a first direction in one embodiment of the present application.
  • FIG. 18 is a schematic structural diagram of a first structural member being squeezed and deformed by a first battery cell assembly and a second battery cell assembly in one embodiment of the present application.
  • FIG. 19 is a schematic structural diagram of two first battery cells connected in parallel and a first insulating member in one embodiment of the present application.
  • FIG. 20 is a view of a first battery cell along a first direction in one embodiment of the present application.
  • FIG. 21 is a schematic structural diagram of two parallel second battery cells connected to a second insulating member in an embodiment of the present application.
  • FIG. 22 is a view of a second battery cell along a first direction in one embodiment of the present application.
  • FIG. 23 is a schematic diagram of the structure of a first battery cell assembly and a second battery cell assembly connected to form a series module in one embodiment of the present application.
  • FIG. 24 is a schematic structural diagram of an extended embodiment of the series module shown in FIG. 23 .
  • FIG. 25 is a schematic diagram of the structure of an electrical device in one embodiment of the present application.
  • Second connecting piece 84 Second connecting piece 84
  • the battery cells will expand during use, and it is necessary to apply pressure to the battery cells when the battery cells expand in order to increase the service life of the electrochemical devices.
  • An embodiment of the present application provides an electrochemical device, including a housing, a first battery cell assembly and at least one first structural member, the housing including a first space, at least part of the first battery cell assembly is disposed in the first space.
  • the first battery cell assembly includes a plurality of first battery cells, and the plurality of first battery cells are stacked along a first direction.
  • the first structural member and the first battery cell assembly are arranged in an arranged manner along a first direction, the first structural member includes a first bottom plate, two first side plates connected to the first bottom plate, the two first side plates are spaced apart along a second direction, the second direction is perpendicular to the first direction, and the two first side plates are fixedly connected to the housing.
  • the first structural member is disposed on one side of the first battery cell assembly along the first direction, and the first bottom plate provides expansion space for the first battery cell assembly, which can apply pressure to the first battery cell and increase the life of the first battery cell assembly.
  • an embodiment of the present application provides an electrochemical device 100, including a housing 10, a first battery cell assembly 20 and at least one first structural member 30, wherein the housing 10 includes a first space 17, and at least a portion of the first battery cell assembly 20 is disposed in the first space 17.
  • the first battery cell assembly 20 includes a plurality of first battery cells 21, and the plurality of first battery cells 21 are stacked and arranged along a first direction X.
  • the first structural member 30 and the first battery cell assembly 20 are arranged in an arranged manner along the first direction X.
  • the first structural member 30 includes a first bottom plate 31 and two first side plates 32, the two first side plates 32 are arranged at intervals along a second direction Y, the first bottom plate 31 is disposed between the two first side plates 32 and connects the two first side plates 32, and the two first side plates 32 are fixedly connected to the housing 10.
  • the second direction Y is perpendicular to the first direction X.
  • the first bottom plate 31 is connected to the first battery cell assembly 20, and along the first direction X, the first bottom plate 31 can be deformed in a direction away from the first battery cell assembly 20.
  • the first bottom plate 31 provides expansion space for the first battery cell assembly 20 , and can apply pressure to the first battery cell 21 , thereby increasing the life of the first battery cell assembly 20 .
  • the housing 10 includes a first wall 11, a second wall 12, a third wall 13, and a fourth wall 14.
  • the first wall 11 and the second wall 12 are spaced apart along a second direction Y.
  • the third wall 13 and the fourth wall 14 are spaced apart along a third direction Z perpendicular to the first direction X and the second direction Y.
  • the third wall 13 and the fourth wall 14 both connect the first wall 11 and the second wall 12.
  • the first wall 11, the second wall 12, the third wall 13, and the fourth wall 14 form a first space 17.
  • one of the two first side panels 32 is fixedly connected to the first wall 11, and the other of the two first side panels 32 is fixedly connected to the second wall 12.
  • the first side panel 32 and the first wall 11 are fixedly connected by fasteners, such as screws.
  • the first side panel 32 and the second wall 12 are fixedly connected by fasteners, such as screws.
  • one of the two first side panels 32 is fixedly connected to the third wall 13, and the other of the two first side panels 32 is fixedly connected to the fourth wall 14.
  • the first side panel 32 and the third wall 13 are fixedly connected by fasteners, such as screws.
  • the first side panel 32 and the fourth wall 14 are fixedly connected by fasteners, such as screws.
  • the electrochemical device 100 includes two first structural members 30, which are disposed on both sides of the first battery cell assembly 20 along the first direction X and are both connected to the first battery cell assembly 20 and the housing 10.
  • the two first structural members 30 can cooperate to apply pressure to the first battery cell assembly 20, further improving the life of the first battery cell assembly 20.
  • the shell 10 also includes a fifth wall 15.
  • the fifth wall 15 is arranged on a side of a first structural member 30 away from the first battery cell assembly 20, and the fifth wall connects the first wall 11, the second wall 12, the third wall 13 and the fourth wall 14.
  • the shell 10 also includes a sixth wall 16.
  • the fifth wall 15 and the sixth wall 16 are spaced apart.
  • the fifth wall 15 and the sixth wall 16 are respectively arranged on both sides of the first battery cell assembly 20.
  • the fifth wall 15 is arranged on the side of a first structural component 30 away from the first battery cell assembly 20, and the sixth wall 16 is arranged on the side of another first structural component 30 away from the first battery cell assembly 20.
  • the fifth wall 15 and the sixth wall 16 are both connected to the first wall 11, the second wall 12, the third wall 13 and the fourth wall 14.
  • one first side plate 32 is fixedly connected to the first wall 11 and the fifth wall 15, and another first side plate 32 is fixedly connected to the second wall 12 and the fifth wall 15.
  • the first side plate 32 is fixedly connected to the first wall 11 and the fifth wall 15 by fasteners, such as screws.
  • the first side plate 32 is fixedly connected to the second wall 12 and the fifth wall 15 by fasteners, such as screws.
  • one first side plate 32 is fixedly connected to the first wall 11 and the sixth wall 16, and another first side plate 32 is fixedly connected to the second wall 12 and the sixth wall 16.
  • the first side plate 32 is fixedly connected to the first wall 11 and the sixth wall 16 by fasteners, such as screws.
  • the first side plate 32 is fixedly connected to the second wall 12 and the sixth wall 16 by fasteners, such as screws.
  • the two first side plates 32 when viewed from the third direction Z, in the same first structural member 30 , are located on a side of the first bottom plate 31 away from the first battery cell assembly 20 .
  • the two first side plates 32 of the same first structural member 30 are located on the side of the first bottom plate 31 away from the first battery cell assembly 20, so that the first bottom plate 31 and the two first side plates 32 form a recessed area 37 with an opening away from the first battery cell assembly 20.
  • the recessed area 37 provides a deformation space for the first battery cell assembly 20 while reducing the influence of the deformation of the first bottom plate 31 on the outer shape of the electrochemical device 100.
  • the first side plate 32 when viewed along the third direction Z, extends along the first direction X, and the first side plate 32 is perpendicular to the first bottom plate 31. In one embodiment, when viewed along the third direction Z, the first side plate 32 is angled with the first bottom plate 31.
  • part of the first side plate 32 is located on the side of the first bottom plate 31 away from the first battery cell assembly 20 , and part of the first side plate 32 is located on the side of the first bottom plate 31 close to the first battery cell assembly 20 (not shown).
  • the first structural member 30 is a sheet metal member, which is integrally made by a sheet metal bending process. In one embodiment, the first bottom plate 31 and the first side plate 32 are welded to form the first structural member 30 .
  • the two first side plates 32 are symmetrically connected to two ends of the first bottom plate 31 .
  • the first distance d1 refers to the distance between a side of the first bottom plate 31 facing away from the first battery cell assembly 20 and an end of the first side plate 32 facing away from the first battery cell assembly 20 in the same first structural member 30 along the first direction X.
  • the number of the first structural member 30 in the electrochemical device 100 is one, d1 ⁇ n*d0*16%, wherein n is the number of the first battery cells 21 in the first battery cell assembly 20, and d0 is the length of each first battery cell 21 along the first direction X.
  • n is the number of the first battery cells 21 in the first battery cell assembly 20
  • d0 is the length of each first battery cell 21 along the first direction X.
  • the number of the first structural members 30 in the electrochemical device 100 is two, and d1 ⁇ n*d0*8%.
  • the first battery cell assembly 20 squeezes the first bottom plates 31 on both sides, so that the deformation of the two first bottom plates 31 does not exceed the first distance d1, which can reduce the influence of the deformation of the first bottom plates 31 on the housing 10 and reduce the influence on the outer shape of the electrochemical device 100.
  • the first structural member 30 further includes two second side plates 33 connected to the first bottom plate 31, and the two second side plates 33 are arranged at intervals along the third direction Z.
  • the second side plates 33 are conducive to enhancing the structural rigidity of the first bottom plate 31, improving the ability of the first bottom plate 31 to resist deformation, and improving the ability of the first bottom plate 31 to resist expansion of the first battery cell assembly 20.
  • the two second side plates 33 are both extended along the second direction Y.
  • the two second side plates 33 are respectively arranged at both ends of the first bottom plate 31 along the third direction Z.
  • the second side plate 33 is located on the side of the first bottom plate 31 away from the first battery cell assembly 20. In one embodiment, in the first direction X, part of the second side plate 33 is located on the side of the first bottom plate 31 away from the first battery cell assembly 20, and part of the second side plate 33 is located on the side of the first bottom plate 31 close to the first battery cell assembly 20. In one embodiment, the first bottom plate 31, the two second side plates 33 and the two first side plates 32 form a recessed area 37 with an opening away from the first battery cell assembly 20.
  • the first structural member 30 is formed into the second side plate 33 by a sheet metal process.
  • the second side plate 33 is connected to the first bottom plate 31 by welding.
  • one of the two second side plates 33 is connected to the third wall 13, and the other of the two second side plates 33 is connected to the fourth wall 14, which is beneficial to enhancing the stability of the first structural member 30 connected to the shell 10, improving the vibration resistance of the electrochemical device 100, and further improving the ability of the first bottom plate 31 to resist deformation.
  • the length of the second side plate 33 extending from the first bottom plate 31 is equal to the length of the first side plate 32 extending from the first bottom plate 31. In one embodiment, in the first direction X, the length of the second side plate 33 extending from the first bottom plate 31 is greater than the length of the first side plate 32 extending from the first bottom plate 31. In one embodiment, in the first direction X, the length of the second side plate 33 extending from the first bottom plate 31 is less than the length of the first side plate 32 extending from the first bottom plate 31.
  • the first side plate 32 and the second side plate 33 are separated from each other when viewed in the first direction X. In one embodiment, along the first direction X, the projections of the two first side plates 32 and the projections of the two second side plates 33 are separated from each other. When the first structural member 30 is deformed too much and any one of the first side plate 32 and the second side plate 33 is damaged, the damaged side plate is separated from the other side plates, which can reduce the impact on the other side plates.
  • the first structural member 30 when the first battery cell assembly 20 has not expanded, has applied pressure to the first battery cell assembly 20 , which is beneficial to improving the stability of the first battery cell assembly 20 connected to the housing 10 and improving the vibration resistance of the electrochemical device 100 .
  • the first structural member 30 when the first battery cell assembly 20 does not expand, the first structural member 30 is connected to the first battery cell assembly 20 in the first direction X, and the first structural member 30 does not apply pressure to the first battery cell assembly 20 .
  • the electrochemical device 100 further includes a first elastic member 41, which is disposed between the first bottom plate 31 and the first battery cell assembly 20, and connects the first bottom plate 31 and the first battery cell assembly 20.
  • the first elastic member 41 can play a protective role, reducing the influence of the first bottom plate 31 on the adjacent first battery cell 21, and the first elastic member 41 can also play an elastic buffering role, and cooperates with the first bottom plate 31 to apply pressure to the first battery cell assembly 20 when the first battery cell assembly 20 expands and deforms.
  • the first elastic member 41 is foam.
  • any two adjacent first cells 21 in the first cell assembly 20 are arranged in contact. In one embodiment, along the first direction X, at least two adjacent first cells 21 in the first cell assembly 20 are arranged in contact. In one embodiment, the electrochemical device 100 further includes a first filler (not shown), which is arranged between two adjacent first cells 21 along the first direction X, and contacts and connects the two first cells 21.
  • a first filler (not shown), which is arranged between two adjacent first cells 21 along the first direction X, and contacts and connects the two first cells 21.
  • the first filler can be elastically deformed, and the first filler can not only play a role in buffering and protection, reducing the impact of the two adjacent first cells 21 on each other when the electrochemical device 100 shakes, but also absorb the expansion and extrusion force of the first cell 21, reducing the impact of the expansion of the first cell 21 on the appearance of the first cell assembly 20.
  • the number of the first filler is multiple, and the first filler is provided between some of the two adjacent first cells 21, and some of the two adjacent first cells 21 are directly contacted and connected.
  • the first filler includes any one of foam, spring, airbag and sheet metal.
  • the first battery cell 21 is a soft-pack battery cell. In other embodiments, the first battery cell 21 may also be a hard-shell battery cell (not shown).
  • the first battery cell 21 includes a first shell 211 , a first electrode assembly 214 , a first electrode terminal 212 and a third electrode terminal 213 .
  • the first electrode assembly 214 is disposed inside the first shell 211 .
  • the first electrode terminal 212 and the third electrode terminal 213 are both connected to the first electrode assembly 214 and extend out of the first shell 211 .
  • One of the first electrode terminal 212 and the third electrode terminal 213 is a positive electrode terminal, and the other is a negative electrode terminal.
  • the first electrode assembly 214 includes a positive electrode sheet, a negative electrode sheet and a separator (not shown), the separator is arranged between the positive electrode sheet and the negative electrode sheet, the positive electrode sheet, the separator and the negative electrode sheet are wound or stacked to form the first electrode assembly 214, one of the first electrode terminal 212 and the third electrode terminal 213 is connected to the positive electrode sheet, and the other is connected to the negative electrode sheet.
  • the first shell 211 includes a first portion 2113 and a second portion 2114 that are connected to each other. After the first portion 2113 and the second portion 2114 are connected, an internal space that can accommodate the first electrode assembly 214 can be formed.
  • the first shell 211 includes a first main body 2111 and a first edge seal 2112, the first edge seal 2112 is connected to and extends from the first main body 2111, the first electrode assembly 214 is disposed inside the first main body 2111, and the first electrode terminal 212 and the third electrode terminal 213 extend from the first edge seal 2112.
  • the first edge seal 2112 includes a first side seal 21121 and a first top seal 21122 connected to each other, the first electrode terminal 212 and the third electrode terminal 213 extend from the first top seal 21122, the first top seal 21122 is located at the end of the first shell 211 along the second direction Y, and the first side seal 21121 is located at the end of the first shell 211 along the third direction Z.
  • the first electrode terminal 212 and the third electrode terminal 213 are respectively located at two opposite ends of the first main body 2111 along the second direction Y.
  • Each first top seal 21122 is connected to two first side seals 21121.
  • the first electrode terminal 212 extends from one first top seal 21122
  • the third electrode terminal 213 extends from the other first top seal 21122.
  • the first electrode terminal 212 and the third electrode terminal 213 are located on the same side of the first main body 2111 along the second direction Y (not shown).
  • the projection of the first shell 211 at least partially overlaps with the projection of the first bottom plate 31.
  • the first shell 211 close to the first structural member 30 can act on the first bottom plate 31.
  • the first bottom plate 31 can provide pressure for the first shell 211, which is beneficial to prolonging the service life of the first battery cell assembly 20.
  • the projection of the first shell 211 is located within the projection of the first bottom plate 31.
  • the first structural member 30 further includes two first protrusions 35 connected to the first bottom plate 31, and the two first protrusions 35 are both located between the two first side plates 32 and are spaced apart along the second direction Y.
  • the two first protrusions 35 can absorb part of the pulling force generated by the deformation of the first bottom plate 31, which is beneficial to reducing the influence of the deformation of the first bottom plate 31 on the two first side plates 32, and is also beneficial to enhancing the structural rigidity of the first bottom plate 31 and improving the ability of the first bottom plate 31 to resist deformation.
  • one first protrusion 35 is close to one first side plate 32, and the other first protrusion 35 is close to the other first side plate 32.
  • the projection of the first electrode assembly 214 is separated from the projections of the two first protrusions 35 , which helps to reduce the impact on the expansion of the first battery cell assembly 20 .
  • the first structural member 30 further includes a first through hole 364 and a second through hole 365 provided on the first bottom plate 31.
  • the projection of the first electrode assembly 214 is separated from the projection of the first through hole 364, which is beneficial to reduce the influence on the expansion of the first battery cell assembly 20.
  • the projection of the first electrode assembly 214 is separated from the projection of the second through hole 365, which is beneficial to reduce the influence on the expansion of the first battery cell assembly 20.
  • the first through hole 364 and the second through hole 365 are located between the two first protrusions 35 , the first through hole 364 is close to one of the first protrusions 35 , and the second through hole 365 is close to the other first protrusion 35 .
  • the number of the first through holes 364 is multiple, and the multiple first through holes 364 are arranged at intervals along the third direction Z.
  • the number of the first through holes 364 is two.
  • the number of the first through hole 364 is one (not shown), and one first through hole 364 is extended along the third direction Z.
  • the number of the second through holes 365 is multiple, and the multiple second through holes 365 are arranged at intervals along the third direction Z.
  • the number of the second through holes 365 is two.
  • the number of the second through hole 365 is one (not shown), and one second through hole 365 is extended along the third direction Z.
  • the projection of the first electrode assembly 214 is separated from the projection of the first through hole 364 , which helps to reduce the impact on the expansion of the first battery cell assembly 20 .
  • the projection of the first electrode assembly 214 is separated from the projection of the second through hole 365 , which is beneficial to reduce the impact on the expansion of the first battery cell assembly 20 .
  • a plurality of third through holes 361 are provided at the connection between the second side plate 33 and the first bottom plate 31, and the plurality of third through holes 361 are arranged at intervals along the second direction Y.
  • the third through holes 361 are provided at the connection between the second side plate 33 and the first bottom plate 31, which is conducive to weakening the structural rigidity of the first bottom plate 31 and reducing the influence on the uniform expansion of the first battery cell assembly 20.
  • the electrochemical device 100 also includes a second battery cell assembly 60, at least a portion of which is disposed in the first space 17 and is arranged along the second direction Y with the first battery cell assembly 20, and the second battery cell assembly 60 includes a plurality of second battery cells 61, and the plurality of second battery cells 61 are stacked along the first direction X.
  • the second battery cell assembly 60 and the first battery cell assembly 20 are located on the same side of the first structural member 30 and connected to the first structural member 30.
  • the second battery cell assembly 60 is located between two first structural members 30, and both ends of the second battery cell assembly 60 are respectively connected to the first bottom plates 31 of the two first structural members 30.
  • the first bottom plate 31 provides expansion space for the second battery cell assembly 60, can apply pressure to the second battery cell, and improve the life of the first battery cell assembly 20.
  • the electrochemical device further includes a second elastic member 42, which is disposed between the first bottom plate 31 and the second battery cell assembly 60, and connects the first bottom plate 31 and the second battery cell assembly 60.
  • the second elastic member 42 can play a protective role, reducing the influence of the first bottom plate 31 on the adjacent second battery cell 61, and the second elastic member 42 can also play an elastic buffering role, and cooperates with the first bottom plate 31 to apply pressure to the second battery cell assembly 60 when the second battery cell assembly 60 expands and deforms.
  • the second elastic member 42 is foam.
  • any two adjacent second cells 61 in the second cell assembly 60 are arranged in contact. In one embodiment, along the first direction X, at least two adjacent second cells 61 in the second cell assembly 60 are arranged in contact.
  • the electrochemical device 100 further includes a second filler (not shown), which is arranged between two adjacent second cells 61 along the first direction X, and contacts and connects the two second cells 61.
  • the second filler can be elastically deformed, and the second filler can not only play a role in buffering and protection, reducing the impact of the two adjacent second cells 61 on each other when the electrochemical device 100 shakes, but also absorb the expansion and extrusion force of the second cell 61, reducing the impact of the expansion of the second cell 61 on the appearance of the second cell assembly 60.
  • the number of the second filler is multiple, and a second filler is provided between some of the two adjacent second cells 61, and some of the two adjacent second cells 61 are directly contacted and connected.
  • the second filler includes any one of foam, spring, airbag and sheet metal.
  • the second battery cell 61 includes a second shell 611, a second electrode assembly 614, a second electrode terminal 612 and a fourth electrode terminal 613.
  • the second electrode assembly 614 is disposed inside the second shell 611, and the second electrode terminal 612 and the fourth electrode terminal 613 are both connected to the second electrode assembly 614 and extend out of the second shell 611.
  • One of the second electrode terminal 612 and the fourth electrode terminal 613 is a positive electrode terminal, and the other of the second electrode terminal 612 and the fourth electrode terminal 613 is a negative electrode terminal.
  • the second electrode assembly 614 includes a positive electrode sheet, a negative electrode sheet and a separator (not shown), the separator is arranged between the positive electrode sheet and the negative electrode sheet, the positive electrode sheet, the separator and the negative electrode sheet are wound or stacked to form the second electrode assembly 614, one of the second electrode terminal 612 and the fourth electrode terminal 613 is connected to the negative electrode sheet, and the other of the second electrode terminal 612 and the fourth electrode terminal 613 is connected to the positive electrode sheet.
  • the second shell 611 includes a third portion 6113 and a fourth portion 6114 that are connected to each other. After the third portion 6113 and the fourth portion 6114 are connected, an internal space capable of accommodating the second electrode assembly 614 can be formed.
  • the second shell 611 includes a second main body 6111 and a second edge seal 6112, the second edge seal 6112 is connected to the second main body 6111 and extends from the second main body 6111, the second electrode assembly 614 is disposed inside the second main body 6111, and the second electrode terminal 612 and the fourth electrode terminal 613 extend from the second edge seal 6112.
  • the second edge seal 6112 includes a second side seal 61121 and a second top seal 61122 connected to each other, the second electrode terminal 612 and the fourth electrode terminal 613 extend from the second top seal 61122, the second top seal 61122 is located at the end of the second shell 611 along the second direction Y, and the second side seal 61121 is located at the end of the second shell 611 along the third direction Z.
  • the second electrode terminal 612 and the fourth electrode terminal 613 are respectively located at two opposite ends of the second battery cell 61 along the second direction Y.
  • Each second top seal 61122 is connected to two second side seals 61121.
  • the second electrode terminal 612 extends from one second top seal 61122
  • the fourth electrode terminal 613 extends from the other second top seal 61122.
  • the second electrode terminal 612 and the fourth electrode terminal 613 are located on the same side of the second battery cell 61 along the second direction Y (not shown).
  • the second electrode terminal 612 and the fourth electrode terminal 613 are respectively located at two opposite ends of the second battery cell 61 along the second direction Y for further description.
  • the projection of the second shell 611 at least partially overlaps with the projection of the first bottom plate 31.
  • the second shell 611 close to the first structural member 30 acts on the first bottom plate 31.
  • the first bottom plate 31 provides pressure for the adjacent second shell 611, which is beneficial to improving the service life of the second battery cell assembly 60.
  • the projection of the second shell 611 is located within the projection of the first bottom plate 31.
  • the projection of the second electrode assembly 614 is separated from the projections of the two first protrusions 35 , which helps to reduce the impact on the expansion of the second battery cell assembly 60 .
  • the projection of the second electrode assembly 614 is separated from the projection of the first through hole 364, which is beneficial to reduce the impact on the expansion of the second battery cell assembly 60. In one embodiment, along the first direction X, the projection of the second electrode assembly 614 is separated from the projection of the second through hole 365, which is beneficial to reduce the impact on the expansion of the second battery cell assembly 60.
  • the first structural member 30 further includes a second protrusion 34 connected to the first bottom plate 31, the second protrusion 34 is provided on the first bottom plate 31, the second protrusion 34 is located between the two first side plates 32, and the second protrusion 34 is located between the two first protrusions 35.
  • the second protrusion 34 is conducive to enhancing the structural rigidity of the first bottom plate 31 and improving the ability of the first bottom plate 31 to resist deformation.
  • the second protrusion 34 is provided on the side of the first bottom plate 31 away from the first battery cell assembly 20.
  • the first bottom plate 31 is formed with the second protrusion 34 by a stamping process.
  • the second protrusion 34 is connected to the first bottom plate 31 by welding.
  • the first bottom plate 31 has a first region 311 and a second region 312, wherein the first region 311 is located between the second convex portion 34 and one first convex portion 35, and the second region 312 is located between the second convex portion 34 and another first convex portion 35.
  • the projection of the first region 311 at least partially overlaps with the projection of the first electrode assembly 214
  • the projection of the second region 312 at least partially overlaps with the projection of the second electrode assembly 614.
  • the second protrusion 34 is located in the middle of the first bottom plate 31, which is conducive to making the structural stiffness of the first area 311 and the second area 312 approximately the same, so that the force exerted by the first structural member 30 on the first battery cell assembly 20 and the second battery cell assembly 60 is approximately the same.
  • the projection of the first electrode assembly 214 is located within the projection of the first area 311
  • the projection of the second electrode assembly 614 is located within the projection of the second area 312.
  • the first structural member 30 is further provided with a fourth through hole 362 and a fifth through hole 363, wherein the fourth through hole 362 is provided in the first region 311, and the fifth through hole 363 is provided in the second region 312.
  • the fourth through hole 362 and the fifth through hole 363 are conducive to weakening the structural rigidity of the first bottom plate 31 and reducing the ability of the first bottom plate 31 to resist deformation.
  • the fourth through hole 362 is close to the second protrusion 34.
  • the fifth through hole 363 is close to the second protrusion 34.
  • the first battery cell assembly 20 and the second battery cell assembly 60 expand, the first battery cell assembly 20 and the second battery cell assembly 60 squeeze the first bottom plate 31 along the first direction X, so that the first bottom plate 31 is deformed.
  • the deformed first bottom plate 31 does not exceed the edges of the two first side plates 32, which is conducive to reducing the influence of the deformation of the first bottom plate 31 on the outer shape of the electrochemical device 100.
  • the first battery cell assembly 20 also includes a first insulating member 22, and the first insulating member 22 is bonded to at least a portion of the surface of each first battery cell 21. Specifically, the first insulating member 22 is bonded to a portion of the surface of the first electrode terminal 212, a portion of the surface of the third electrode terminal 213 and at least a portion of the surface of the first shell 211.
  • the first insulating member 22 covers part of the surface of the first electrode terminal 212 and part of the surface of the third electrode terminal 213, which is conducive to supporting and protecting, reducing the risk of damage to the first electrode terminal 212 and the third electrode terminal 213, improving the insulation effect, and reducing the risk of short circuit between adjacent electrode terminals.
  • the provision of the first insulating member 22 is conducive to reducing the amount of fillers for the first electrode terminal 212 and the third electrode terminal 213 area, saving the cost of the electrochemical device 100.
  • the first insulating member 22 covers at least a portion of the surface of the first shell 211, which is beneficial to protecting the first shell 211 and reducing the risk of damage to the first shell 211. In one embodiment, the first insulating member 22 completely covers the first top seal portion 21122. In one embodiment, the first insulating member 22 covers a portion of the surface of the first main body portion 2111. In one embodiment, the first insulating member 22 completely covers the surface of the first shell 211.
  • the projection of the first electrode assembly 214 is separated from the projection of the first insulating member 22 (as shown in FIG. 20 ), which is beneficial to reducing the impact on the expansion of the first electrode assembly 214 and reducing the impact of the expansion of the first electrode assembly 214 on the first electrode terminal 212 and the third electrode terminal 213.
  • the projection of the first insulating member 22 is located within the projection of the first bottom plate 31.
  • the first bottom plate 31 applies pressure to the first insulating member 22 and the first shell 211, which helps to reduce the effect of the deformation of the first shell 211 on the pulling of the first insulating member 22, and reduce the effect of the deformation of the first shell 211 pulling the first insulating member 22 on the first electrode terminal 212 and the third electrode terminal 213.
  • the first insulating member 22 is formed by injection molding an insulating material onto a portion of the surface of the first battery cell 21 , which helps to simplify the process of connecting the first insulating member 22 to the first battery cell 21 and save the production cost of the electrochemical device 100 .
  • the first insulating member 22 is formed on a portion of the surface of the first battery cell 21 by pouring an insulating material, which is helpful to simplify the process of connecting the first insulating member 22 to the first battery cell 21 and save the production cost of the electrochemical device 100. For example, pouring potting glue.
  • the first battery cell assembly 20 includes two first battery cells 21 .
  • the two first battery cells 21 are stacked along the first direction X, and the first insulating member 22 covers a portion of the surface of the two first battery cells 21 .
  • the number of the first battery cells 21 in the first battery cell assembly 20 may also be three, four, five or more (not shown).
  • the following further describes the example where the number of the first battery cells 21 in the first battery cell assembly 20 is two.
  • first battery cell assembly 20 two first shells 211 are stacked along the first direction X, and the two first battery cells 21 are connected in parallel or in series. In one embodiment, the two first battery cells 21 are connected in series. In one embodiment, the two first battery cells 21 are connected in parallel.
  • first electrode terminals 212 are partially exposed from the first insulating member 22 after being connected, and two third electrode terminals 213 are partially exposed from the first insulating member 22 after being connected.
  • the portion of the first insulating member 22 covering the electrode terminal forms a first channel 221, and the first channel 221 penetrates the first insulating member 22 along the third direction Z.
  • the first channel 221 is beneficial to increasing the surface area of the first insulating member 22 and forming a heat dissipation channel for the coolant to pass through, thereby improving the heat dissipation efficiency of the first insulating member 22 and improving the heat dissipation rate of the first battery cell 21.
  • the electrochemical device 100 includes a plurality of first battery cell assemblies 20.
  • the plurality of first battery cell assemblies 20 are connected in series.
  • the plurality of first battery cell assemblies 20 are connected in parallel.
  • the plurality of first battery cell assemblies 20 are connected in a combination of series and parallel connection.
  • first battery cell assemblies 20 connected in series in sequence is taken as an example for further explanation.
  • the two outermost first battery cell assemblies 20 each have an exposed electrode terminal that is not connected to the electrode terminal of the first battery cell assembly 20 thereof, thereby constituting a total positive electrode terminal 81 and a total negative electrode terminal 82 of the electrochemical device 100.
  • the electrochemical device 100 further includes a circuit board (not shown), which is disposed in the housing 10.
  • the circuit board is connected to the first battery cell assembly 20 by connecting the total positive electrode terminal 81 and the total negative electrode terminal 82, and the circuit board can control the charging and discharging of the first battery cell assembly 20.
  • the circuit board includes a BMS assembly (Battery Management System), which includes a plurality of electronic components, and the plurality of electronic components can realize functions such as data collection, control, protection, communication, power calculation, signal transmission, and power transmission of the battery cell.
  • BMS assembly Battery Management System
  • the electrochemical device 100 further includes a first connector 83 and a second connector 84, wherein the first connector 83 connects the total positive electrode terminal 81 and the circuit board, and the second connector 84 connects the total negative electrode terminal 82 and the circuit board, so that the first battery cell assembly 20 is connected to the circuit board.
  • the material of the first connector 83 includes at least one of copper, aluminum, nickel, and a nickel alloy.
  • the material of the second connector 84 includes at least one of copper, aluminum, nickel, and a nickel alloy.
  • the two adjacent first battery cell assemblies 20 are connected in series by connecting the first electrode terminal 212 and the third electrode terminal 213 at the end. In one embodiment, the first electrode terminal 212 and the third electrode terminal 213 are connected by bending toward each other.
  • the electrochemical device 100 further includes a conductive member 90, the first electrode terminal 212 and the third electrode terminal 213 are bent toward each other and are both connected to the conductive member 90, and the first electrode terminal 212 and the third electrode terminal 213 are electrically connected by connecting the conductive member 90.
  • the first electrode terminal 212 and the third electrode terminal 213 are connected to the conductive member 90 by welding, such as laser welding or ultrasonic welding.
  • the second battery cell assembly 60 also includes a second insulating member 62, which is bonded to at least a portion of the surface of each second battery cell 61.
  • the second insulating member 62 is bonded to a portion of the surface of the second electrode terminal 612, a portion of the surface of the fourth electrode terminal 613, and at least a portion of the surface of the second shell 611.
  • the second insulating member 62 covers part of the surface of the second electrode terminal 612 and part of the surface of the fourth electrode terminal 613, which is conducive to supporting and protecting, reducing the risk of damage to the second electrode terminal 612 and the fourth electrode terminal 613, improving the insulation effect, and reducing the risk of short circuit between adjacent electrode terminals.
  • the provision of the second insulating member 62 is conducive to reducing the amount of fillers in the second electrode terminal 612 and the fourth electrode terminal 613 area, saving the cost of the electrochemical device 100.
  • the second insulating member 62 covers at least a portion of the surface of the second shell 611, which is beneficial to protecting the second shell 611 and reducing the risk of damage to the second shell 611. In one embodiment, the second insulating member 62 completely covers the second top seal portion 61122. In one embodiment, the second insulating member 62 covers a portion of the surface of the second main body portion 6111. In one embodiment, the second insulating member 62 completely covers the surface of the second shell 611.
  • the projection of the second electrode assembly 614 is separated from the projection of the second insulating member 62 (as shown in FIG. 22 ), which is beneficial to reducing the impact on the expansion of the second electrode assembly 614 and reducing the impact of the expansion of the second electrode assembly 614 on the second electrode terminal 612 and the fourth electrode terminal 613.
  • the projection of the second insulating member 62 is located within the projection of the first bottom plate 31.
  • the first bottom plate 31 applies pressure to the second insulating member 62 and the second shell 611, which helps to reduce the effect of the deformation of the second shell 611 on the pulling of the second insulating member 62, and reduce the effect of the deformation of the second shell 611 pulling the second insulating member 62 on the second electrode terminal 612 and the fourth electrode terminal 613.
  • the second insulating member 62 is formed by injection molding an insulating material onto a portion of the surface of the second battery cell 61 , which helps to simplify the process of connecting the second insulating member 62 to the second battery cell 61 and save the production cost of the electrochemical device 100 .
  • the second insulating member 62 is formed on a portion of the surface of the second battery cell 61 by pouring an insulating material, which is helpful to simplify the process of connecting the second insulating member 62 to the second battery cell 61 and save the production cost of the electrochemical device 100. For example, pouring potting glue.
  • the second battery cell assembly 60 includes two second battery cells 61 .
  • the two second battery cells 61 are stacked along the first direction X, and the second insulating member 62 covers a portion of the surface of the two second battery cells 61 .
  • the number of the second battery cells 61 in the second battery cell assembly 60 may also be three, four, five or more (not shown).
  • the following further describes the example in which the number of the second battery cells 61 in the second battery cell assembly 60 is two.
  • two second shells 611 are stacked along the first direction X, and the two second battery cells 61 are connected in parallel or in series. In one embodiment, the two second battery cells 61 are connected in series. In one embodiment, the two second battery cells 61 are connected in parallel.
  • two second electrode terminals 612 are partially exposed from the second insulating member 62 after being connected, and two fourth electrode terminals 613 are partially exposed from the second insulating member 62 after being connected.
  • the portion of the second insulating member 62 covering the electrode terminal forms a second channel 621, and the second channel 621 penetrates the second insulating member 62 along the third direction Z.
  • the second channel 621 is beneficial to increasing the surface area of the second insulating member 62 and forming a heat dissipation channel for the coolant to pass through, thereby improving the heat dissipation efficiency of the second insulating member 62 and improving the heat dissipation rate of the second battery cell 61.
  • the electrochemical device 100 includes a plurality of second battery cell assemblies 60, and a plurality of first battery cell assemblies 20 are connected to the plurality of second battery cell assemblies 60.
  • the plurality of first battery cell assemblies 20 and the plurality of second battery cell assemblies 60 are connected in series in sequence.
  • the plurality of first battery cell assemblies 20 and the plurality of second battery cell assemblies 60 are connected in parallel.
  • the plurality of first battery cell assemblies 20 and the second battery cell assemblies 60 are connected in a combination of series and parallel connection.
  • first battery cell assemblies 20 and a plurality of second battery cell assemblies 60 are sequentially connected in series as an example for further explanation.
  • the number of the first battery cell assemblies 20 is equal to the number of the second battery cell assemblies 60, and they correspond one to one along the second direction Y.
  • the number of the first battery cell assemblies 20 and the number of the second battery cell assemblies 60 are both eight. In other embodiments, the number of the first battery cell assemblies 20 may also be different from the number of the second battery cell assemblies 60 (not shown).
  • the first cell assembly 20 and the second cell assembly 60 are connected in series, and one first cell assembly 20 and one second cell assembly 60 opposite to each other along the second direction Y form a series module 70, and the first cell assembly 20 and the second cell assembly 60 constitute eight series modules 70, and the eight series modules 70 are stacked in sequence along the first direction X, and two adjacent series modules 70 are connected in series.
  • the first series module 70 and the eighth series module 70 each have an exposed electrode terminal that is not connected to the electrode terminals of other series modules 70, forming the total positive electrode terminal 81 and the total negative electrode terminal 82 of the electrochemical device 100.
  • the circuit board is connected to the first battery cell assembly 20 and the second battery cell assembly 60 by connecting the total positive electrode terminal 81 and the total negative electrode terminal 82 , and the circuit board can control the charging and discharging of the first battery cell assembly 20 and the second battery cell assembly 60 .
  • the two adjacent series modules 70 are connected in series through electrode terminals at the ends.
  • the two electrode terminals are connected by bending toward each other.
  • the two electrode terminals bent toward each other are connected to the same conductive member 90, and the two electrode terminals are electrically connected by connecting the conductive member 90.
  • the two electrode terminals are connected to the conductive member 90 by welding, such as laser welding or ultrasonic welding.
  • the polarities of the first electrode terminal 212 and the second electrode terminal 612 are opposite, and the first electrode terminal 212 of the first battery cell assembly 20 is connected to the second electrode terminal 612 of the second battery cell assembly 60 .
  • the first electrode terminal 212 includes a first bending section 2121 and a first connecting section 2122, the first bending section 2121 and the first connecting section 2122 extend from the first insulating member 22, the first bending section 2121 connects the first shell 211 and the first connecting section 2122, the first bending section 2121 can be deformed along the first direction X, and the first connecting section 2122 is used to connect other electrode terminals or conductive members 90.
  • the first connecting section 2122 is connected to the second electrode terminal 612.
  • the first bending section 2121 is helpful to buffer the pulling force or squeezing force generated by the relative displacement, thereby reducing the influence of the pulling or squeezing generated by the relative displacement of the first battery cell assembly 20 and the second battery cell assembly 60 on the first electrode terminal 212 and the second electrode terminal 612.
  • the first bending section 2121 can also be deformed along the second direction Y.
  • the first bending section 2121 is conducive to buffering the pulling force or squeezing force on the first electrode terminal 212, thereby reducing the influence of the relative displacement of the first battery cell assembly 20 and the second battery cell assembly 60 on the pulling or squeezing of the first electrode terminal 212 and the second electrode terminal 612.
  • the first bending section 2121 is in any one of an N-shape, an S-shape, a V-shape and a wave shape.
  • the second electrode terminal 612 includes a second bending section 6121 and a second connecting section 6122, the second bending section 6121 and the second connecting section 6122 extend out of the second insulating member 62, the second bending section 6121 connects the second shell 611 and the second connecting section 6122, the second bending section 6121 can be deformed along the first direction X, and the second connecting section 6122 is used to connect other electrode terminals or conductive members 90.
  • the second connecting section 6122 is connected to the first connecting section 2122.
  • the second bending section 6121 is helpful to buffer the pulling force or squeezing force generated by the relative displacement, thereby reducing the influence of the pulling or squeezing force generated by the relative displacement on the first electrode terminal 212 and the second electrode terminal 612 .
  • the second bending section 6121 can also be deformed along the second direction Y.
  • the second bending section 6121 is conducive to buffering the pulling force or squeezing force on the second electrode terminal 612, thereby reducing the influence of the relative displacement of the first battery cell assembly 20 and the second battery cell assembly 60 on the pulling or squeezing of the first electrode terminal 212 and the second electrode terminal 612.
  • the second bending segment 6121 is in any one of an N-shape, an S-shape, a V-shape and a wave shape.
  • the third electrode terminal 213 of the first battery cell assembly 20 is connected to the fourth electrode terminal 613 of the second battery cell assembly 60 .
  • the third electrode terminal 213 includes a third bending section 2131 and a third connecting section 2132, the third bending section 2131 and the third connecting section 2132 extend out of the first insulating member 22, the third bending section 2131 connects the first housing 211 and the third connecting section 2132, the third bending section 2131 can be deformed along the first direction X, and the third connecting section 2132 is used to connect other electrode terminals or conductive members 90.
  • the third connecting section 2132 is connected to the fourth electrode terminal 613.
  • the third bending segment 2131 is helpful to buffer the pulling force or squeezing force generated by the relative displacement, thereby reducing the influence of the pulling or squeezing force generated by the relative displacement on the third electrode terminal 213 and the fourth electrode terminal 613.
  • the third bending section 2131 can also be deformed along the second direction Y.
  • the third bending section 2131 is conducive to buffering the pulling force or squeezing force on the third electrode terminal 213, and reducing the influence of the relative displacement of the first battery cell assembly 20 and the second battery cell assembly 60 on the pulling or squeezing of the third electrode terminal 213 and the fourth electrode terminal 613.
  • the third bending segment 2131 is in any one of an N-shape, an S-shape, a V-shape and a wave shape.
  • the fourth electrode terminal 613 includes a fourth bending section 6131 and a fourth connecting section 6132, the fourth bending section 6131 and the fourth connecting section 6132 extend from the second insulating member 62, the fourth bending section 6131 connects the second shell 611 and the fourth connecting section 6132, the fourth bending section 6131 can be deformed along the first direction X, and the fourth connecting section 6132 is used to connect other electrode terminals or conductive members 90.
  • the fourth connecting section 6132 is connected to the third connecting section 2132.
  • the fourth bending segment 6131 is helpful to buffer the pulling force or squeezing force generated by the relative displacement, thereby reducing the influence of the pulling or squeezing force generated by the relative displacement on the third electrode terminal 213 and the fourth electrode terminal 613 .
  • the fourth bending section 6131 can also be deformed along the second direction Y.
  • the fourth bending section 6131 is conducive to buffering the pulling force or squeezing force on the fourth electrode terminal 613, and reducing the influence of the relative displacement of the first battery cell assembly 20 and the second battery cell assembly 60 on the pulling or squeezing of the third electrode terminal 213 and the fourth electrode terminal 613.
  • the fourth bending segment 6131 is in any one of an N-shape, an S-shape, a V-shape and a wave shape.
  • the fourth wall 14 is provided with a third protrusion 141 .
  • the third protrusion 141 is extended from the surface of the fourth wall 14 toward the third wall 13 .
  • the third protrusion 141 is disposed between the first insulating member 22 and the second insulating member 62, and connects the first insulating member 22 and the second insulating member 62.
  • the third protrusion 141 is beneficial for limiting the relative displacement of the first battery cell 21 and the second battery cell 61 along the second direction Y, reducing the number of limiters or fillers of the electrochemical device 100 for the first battery cell 21 and the second battery cell 61, and reducing the cost of the electrochemical device 100.
  • the number of the third protrusion 141 is one, and the third protrusion 141 is arranged to extend along the first direction X. In one embodiment, the number of the third protrusion 141 is multiple, and the multiple third protrusions 141 are arranged along the first direction X at intervals.
  • a fourth protrusion 142 is disposed on the fourth wall 14 , and the fourth protrusion 142 extends from a surface of the fourth wall 14 toward the third wall 13 .
  • the fourth protrusion 142 is arranged on the side of the first shell 211 away from the second shell 611, and is connected to the first insulating member 22 at the end of the first shell 211.
  • the fourth protrusion 142 is conducive to limiting the relative displacement of the first battery cell 21 along the second direction Y.
  • the fourth protrusion 142 cooperates with the third protrusion 141 to limit the displacement of the first battery cell 21 along the second direction Y, reducing the number of limiters or fillers of the electrochemical device 100 for the first battery cell 21, and reducing the cost of the electrochemical device 100.
  • the number of the fourth protrusion 142 is one, and the fourth protrusion 142 is arranged to extend along the first direction X. In one embodiment, the number of the fourth protrusion 142 is multiple, and the multiple fourth protrusions 142 are arranged along the first direction X at intervals.
  • a fifth protrusion 143 is disposed on the fourth wall 14 , and the fifth protrusion 143 extends from a surface of the fourth wall 14 toward the third wall 13 .
  • the fifth protrusion 143 is arranged on the side of the second shell 611 away from the first shell 211, and is connected to the second insulating member 62 at the end of the second shell 611.
  • the fifth protrusion 143 is conducive to limiting the relative displacement of the second battery cell 61 along the second direction Y.
  • the fifth protrusion 143 cooperates with the third protrusion 141 to limit the displacement of the third shell 10 along the second direction Y, reducing the number of limiters or fillers of the electrochemical device 100 for the second battery cell 61, and reducing the cost of the electrochemical device 100.
  • the number of the fifth protrusion 143 is one, and the fifth protrusion 143 is arranged to extend along the first direction X. In one embodiment, the number of the fifth protrusion 143 is multiple, and the multiple fifth protrusions 143 are arranged along the first direction X at intervals.
  • a sixth protrusion (not shown) is provided on the third wall 13, and the sixth protrusion extends from the surface of the third wall 13 toward the fourth wall 14.
  • the sixth protrusion corresponds to the third protrusion 141 in position, function and effect, which will not be described again.
  • a seventh protrusion (not shown) is provided on the third wall 13, and the seventh protrusion extends from the surface of the third wall 13 toward the fourth wall 14.
  • the seventh protrusion corresponds to the fourth protrusion 142 in position, function and effect, which will not be described again.
  • an eighth protrusion (not shown) is provided on the third wall 13, and the eighth protrusion extends from the surface of the third wall 13 toward the fourth wall 14.
  • the eighth protrusion corresponds to the fifth protrusion 143 in position, function and effect, which will not be described again.
  • the fourth wall 14 and the third wall 13 are respectively connected to the two ends of the first insulating member 22, and the fourth wall 14 and the third wall 13 are respectively connected to the two ends of the second insulating member 62.
  • the fourth wall 14 and the third wall 13 are connected to the first insulating member 22 and the second insulating member 62 by matching, which is beneficial to reduce the number of limit members for the first battery cell assembly 20 and the second battery cell assembly 60, thereby saving the cost of the electrochemical device 100.
  • the first structural member 30 is disposed on one side of the first battery cell assembly 20 along the first direction X.
  • the first structural member 30 can apply pressure to the first battery cell 21 through deformation of the first bottom plate 31 to improve the service life of the first battery cell assembly 20.
  • an embodiment of the present application further provides an electrical device 200, including the electrochemical device 100 described in any of the aforementioned embodiments, and the electrochemical device 100 can provide electrical energy for the electrical device 200.
  • the electrochemical device 100 applies pressure to the first battery cell 21 through the first structural member 30, thereby increasing the service life of the electrochemical device 100 and reducing the impact of the service life of the electrochemical device 100 on the electrical device 200.
  • the electric device 200 includes but is not limited to any one of a drone, an electric two-wheeled vehicle, a household appliance, and a robot.

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

Abstract

一种电化学装置（100）及用电设备（200），电化学装置（100）包括壳体（10）和第一电芯组件（20），壳体（10）包括第一空间，第一电芯组件（20）设于第一空间（17）内。第一电芯组件（20）包括多个第一电芯（20），多个第一电芯（20）沿第一方向（X）堆叠设置。壳体（10）包括至少一个第一结构件（30），第一结构件（30）与第一电芯组件（20）沿第一方向（X）排列设置。电化学装置（100）中，第一结构件（30）能够通过变形对第一电芯（20）施加压力，降低第一电芯（20）过度膨胀的风险，提高电化学装置（100）的使用寿命。

Description

电化学装置及用电设备 技术领域
本申请涉及储能技术领域，特别涉及一种电化学装置及用电设备。
背景技术
目前，包含多个电芯的电化学装置内，电芯在使用过程中会发生膨胀，需要在电芯膨胀时给电芯施加压力，提高电化学装置的使用寿命。
发明内容
鉴于上述状况，有必要提供一种电化学装置，能够在电芯膨胀时施加压力，提高电化学装置的使用寿命。
本申请的实施例提供一种电化学装置，包括壳体、第一电芯组件和至少一个第一结构件，壳体包括第一空间，第一电芯组件的至少部分设于第一空间内。第一电芯组件包括多个第一电芯，多个第一电芯沿第一方向堆叠设置。第一结构件与第一电芯组件沿第一方向排列设置，第一结构件包括第一底板、连接第一底板的两个第一侧板，两个第一侧板沿第二方向间隔设置，第二方向与第一方向垂直，两个第一侧板与壳体固定连接。
上述电化学装置中，第一结构件沿第一方向设于第一电芯组件的一侧，第一底板为第一电芯组件提供膨胀空间，可对第一电芯施加压力，提升第一电芯组件的寿命。
在本申请的一些实施例中，壳体包括第一壁、第二壁、第三壁和第四壁，第一壁和第二壁沿第二方向间隔设置，第三壁和第四壁沿第三方向间隔设置，第三方向与第一方向和第二方向均垂直；两个第一侧板中的一个与第一壁固定连接，两个第一侧板中的另一个与第二壁固定连接，和/或，两个第一侧板中的一个与第三壁固定连接，两个第一侧板中的另一个与第四壁固定连接。第一结构件通过两个第一侧板固定连接于壳体，第一电芯组件在膨胀时，第一电芯组件挤压第一底板，使第一底板发生变形，第一底板对第一电芯组件施加压力。
在本申请的一些实施例中，壳体还包括第五壁，沿第一方向，第五壁设于第一结构件远离第一电芯组件的一侧，有利于提高第一结构件连接壳体的稳定性。
在本申请的一些实施例中，电化学装置包括两个第一结构件，壳体还包括第六壁，第六壁和第五壁沿第一方向间隔设置；沿第一方向，第五壁设于其中一个第一结构件远离第一电芯组件的一侧，第六壁设于另外一个第一结构件远离第一电芯组件的一侧。两个第一结构件能够配合对第一电芯组件施 加压力，进一步提升第一电芯组件的寿命。
在本申请的一些实施例中，两个第一侧板中的一个与第一壁和第五壁固定连接，另一个第一侧板与第二壁和第五壁固定连接，有利于提高第一结构件连接壳体的稳定性。
在本申请的一些实施例中，沿第一方向，第一底板和第一侧板的边缘存在第一距离d1。当第一底板沿第一方向发生变形时，第一距离d1能够提供变形空间，减少第一底板的变形对壳体的影响，减少对电化学装置外廓形状的影响。
在本申请的一些实施例中，第一结构件的数量为一个，d1≥n*d0*16％，其中，n为第一电芯组件中第一电芯的数量，d0为每个第一电芯沿第一方向上的长度。当第一电芯组件中的所有第一电芯平均发生不超过16％的膨胀时，沿第一方向，第一电芯组件挤压第一底板，使第一底板发生的变形量不超过第一距离d1，可减少第一底板的变形对壳体的影响，减少对电化学装置外廓形状的影响。
在本申请的一些实施例中，第一结构件的数量为两个，两个第一结构件沿第一方向分别设于第一电芯组件的两侧，并均连接于壳体，d1≥n*d0*8％。当第一电芯组件中的所有第一电芯平均发生不超过16％的膨胀时，沿第一方向，第一电芯组件挤压两侧的第一底板，使两个第一底板发生的变形量不超过第一距离d1，可减少第一底板的变形对壳体的影响，减少对电化学装置外廓形状的影响。
在本申请的一些实施例中，第一结构件还包括两个设于第一底板的第一凸部，两个第一凸部位于两个第一侧板之间，并沿第二方向间隔设置。两个第一凸部能够吸收部分第一底板变形产生的拉扯力，有利于减少第一底板变形对两个第一侧板的影响，还有利于增强第一底板的结构刚度，提高第一底板抵抗变形的能力。
在本申请的一些实施例中，第一结构件还包括设于第一底板的第一通孔和第二通孔，第一通孔和第二通孔位于两个第一凸部之间。第一通孔和第二通孔有利于弱化第一底板的结构刚度，有利于第一电芯组件的膨胀。
在本申请的一些实施例中，第一电芯包括第一电芯壳体、第一电极组件、以及连接至第一电极组件并且从第一电芯壳体伸出的第一电极端子；沿第一方向，第一电极组件和两个第一凸部的投影均相离，有利于提升第一电芯组件均匀膨胀。
在本申请的一些实施例中，第一电芯包括第一电芯壳体、第一电极组件、以及连接至第一电极组件并且从第一电芯壳体伸出的第一电极端子；沿第一方向，第一电极组件的投影和第一通孔的投影相离，第一电极组件的投影和第二通孔的投影相离，有利于提升第一电芯组件均匀膨胀。
在本申请的一些实施例中，第一电芯包括第一电芯壳体、第一电极组件、以及连接至第一电极组件并且从第一电芯壳体伸出的第一电极端子；电化学 装置还包括第一绝缘件，第一绝缘件粘接第一电芯壳体的至少部分及第一电极端子伸出第一电芯壳体外的至少部分。第一绝缘件覆盖于第一电极端子的部分表面和第三电极端子的部分表面，能够起到支撑、防护作用，降低第一电极端子和第三电极端子受损的风险，还能够起到绝缘的作用，降低相邻的电极端子发生短路的风险。第一绝缘件的设置，有利于减少针对第一电极端子和第三电极端子区域的填充物的数量，节约电化学装置的成本。第一绝缘件覆盖于第一壳体的至少部分表面，有利于保护第一壳体，降低第一壳体被外物损伤的风险。
在本申请的一些实施例中，在第一方向上，第一电极组件的投影与第一绝缘件的投影相离，有利于提升第一电极组件的均匀膨胀，降低第一电极组件膨胀时对第一电极端子和第三电极端子的影响。
在本申请的一些实施例中，在第一方向上，第一绝缘件的投影位于第一底板的投影内，在第一电芯组件膨胀时，第一底板对第一绝缘件和第一壳体施加压力，有利于减少第一壳体变形对第一绝缘件拉扯的影响，减少第一壳体变形拉扯第一绝缘件对第一电极端子和第三电极端子的影响。
在本申请的一些实施例中，第一结构件还包括与第一底板连接的两个第二侧板，两个第二侧板沿第三方向间隔设置，第三方向与第一方向和第二方向均垂直。第二侧板有利于增强第一底板的结构刚度，提高第一底板抵抗变形的能力。
在本申请的一些实施例中，沿第一方向，两个第一侧板和两个第二侧板投影相离。当第一结构件变形过大导致第一侧板和第二侧板中的任意一个发生损坏时，损坏的侧板与其他侧板相离，能够减少对其他侧板的影响。
在本申请的一些实施例中，第二侧板与第一底板的连接处设有第三通孔，有利于弱化第一底板的结构刚度，提升第一电芯组件均匀膨胀。
在本申请的一些实施例中，第一结构件还包括两个设于第一底板的第一凸部，两个第一凸部位于两个第一侧板之间，并沿第二方向间隔设置；第一结构件具有第一区域，第一区域位于两个第一凸部之间；第二侧板与第一底板的连接处设有第三通孔，第三通孔的投影与第一区域的投影相离，有利于提升第一电芯组件均匀膨胀。
在本申请的一些实施例中，电化学装置还包括第二电芯组件，第二电芯组件的至少部分设于第一空间，并与第一电芯组件沿第二方向排列设置，第二电芯组件包括多个第二电芯，多个第二电芯沿第一方向堆叠设置；沿第一方向，第一结构件与第二电芯组件排列设置。
在本申请的一些实施例中，第一结构件还包括两个设于第一底板的第一凸部，两个第一凸部位于两个第一侧板之间，并沿第二方向间隔设置；第二电芯包括第二电芯壳体、第二电极组件、以及连接至第二电极组件并且从第二电芯壳体伸出的第二电极端子；沿第一方向，第二电极组件和两个第一凸部的投影均相离，有利于提升第二电芯组件6均匀膨胀。
在本申请的一些实施例中，第一结构件还包括设于第一底板的第一通孔和第二通孔，第一通孔和第二通孔位于两个第一凸部之间；沿第一方向，第二电极组件的投影和第一通孔的投影相离，第二电极组件的投影和第二通孔的投影相离，有利于提升第二电芯组件均匀膨胀。
在本申请的一些实施例中，第二电芯包括第二电芯壳体、第二电极组件、以及连接至第二电极组件并且从第二电芯壳体伸出的第二电极端子；电化学装置还包括第二绝缘件，第二绝缘件包覆第二电芯壳体的至少部分及第二电极端子的至少部分。第二绝缘件覆盖于第二电极端子的部分表面和第四电极端子的部分表面，能够起到支撑、防护作用，降低第二电极端子和第四电极端子受损的风险，还能够起到绝缘的作用，降低相邻的电极端子发生短路的风险。第二绝缘件的设置，有利于减少针对第二电极端子和第四电极端子区域的填充物的数量，节约电化学装置的成本。第二绝缘件覆盖于第二壳体的至少部分表面，有利于保护第二壳体，降低第二壳体被外物损伤的风险。
在本申请的一些实施例中，在第一方向上，第二电极组件的投影与第二绝缘件的投影相离，有利于提升第二电极组件的均匀膨胀，降低第二电极组件膨胀时对第二电极端子和第四电极端子的影响。
在本申请的一些实施例中，在第一方向上，第二绝缘件的投影与第一底板的投影有重叠，在第二电芯组件膨胀时，第一底板对第二绝缘件和第二壳体施加压力，有利于减少第二壳体变形对第二绝缘件拉扯的影响，减少第二壳体变形拉扯第二绝缘件对第二电极端子和第四电极端子的影响。
在本申请的一些实施例中，第一结构件还包括第二凸部，第二凸部设于第一底板，第二凸部位于两个第一侧板之间，第二凸部有利于增强第一底板的结构刚度，提高第一底板抵抗变形的能力。
在本申请的一些实施例中，第一结构件具有第一区域和第二区域，第一区域位于第二凸部与一个第一侧板之间，第二区域位于第二凸部与另一个第一侧板之间。
在本申请的一些实施例中，在第一方向X上，第一区域的投影与第一电极组件的投影至少部分重叠，有利于提升第一电芯组件均匀膨胀。
在本申请的一些实施例中，在第一方向X上，第二区域的投影与第二电极组件的投影至少部分重叠，有利于提升第二电芯组件均匀膨胀。
在本申请的一些实施例中，第一结构件上还设有第四通孔和第五通孔，第四通孔设于第一区域，第五通孔设于第二区域。第四通孔和第五通孔有利于弱化第一底板的结构刚度，降低第一底板抵抗变形的能力。
在本申请的一些实施例中，电化学装置还包括第一弹性件，第一弹性件设于第一底板和第一电芯组件之间，并连接第一底板和第一电芯组件。第一弹性件能够起到防护作用，减少第一底板对相邻的第一电芯的磨损影响，并且，第一弹性件还能够起到弹性缓冲的作用，在第一电芯组件膨胀变形时与第一底板配合为第一电芯组件提供压力。
在本申请的一些实施例中，沿第一方向，多个第一电芯中的至少两个相邻的电芯接触设置。
本申请的实施例还提供一种用电设备，包括上述任一项实施例所述的电化学装置。
上述的用电设备中，电化学装置通过设置第一结构件给电芯施加压力，提升电化学装置的使用寿命，减少电化学装置的使用寿命对用电设备的影响。
附图说明
图1是本申请的一个实施例中电化学装置的立体结构示意图。
图2是图1所示电化学装置的爆炸图。
图3是图1所示电化学装置的内部结构示意图。
图4是图1所示电化学装置的扩展实施例的立体结构示意图。
图5是图4所示电化学装置的爆炸图。
图6是本申请的一个实施例中第一结构件的结构示意图。
图7是本申请的一个实施例中第一结构件在第三方向上的剖视图。
图8是本申请的一个实施例中第一电芯的结构示意图。
图9是本申请的一个实施例中第一电芯封装前的结构示意图。
图10是本申请的一个实施例中电化学装置的部分结构沿第一方向上的结构示意图。
图11是图1所示电化学装置的扩展实施例的立体结构示意图。
图12是图11所示电化学装置的爆炸图。
图13是图11所示电化学装置的内部结构示意图。
图14是本申请的一个实施例中第二电芯的结构示意图。
图15是本申请的一个实施例中第二电芯封装前的结构示意图。
图16是本申请的一个实施例中第一结构件的结构示意图。
图17是本申请的一个实施例中电化学装置的部分结构沿第一方向上的结构示意图。
图18是本申请的一个实施例中第一结构件被第一电芯组件和第二电芯组件挤压变形的结构示意图。
图19是本申请的一个实施例中两个并联的第一电芯与第一绝缘件连接的结构示意图。
图20是本申请的一个实施例中第一电芯沿第一方向上的视图。
图21是本申请的一个实施例中两个并联的第二电芯与第二绝缘件连接的结构示意图。
图22是本申请的一个实施例中第二电芯沿第一方向上的视图。
图23是本申请的一个实施例中第一电芯组件与第二电芯组件连接形成串联模组的结构示意图。
图24是图23所示串联模组的扩展实施例的结构示意图。
图25是本申请的一个实施例中用电设备的结构示意图。
主要元件符号说明
电化学装置                           100
壳体                                 10
第一壁                               11
第二壁                               12
第三壁                               13
第四壁                               14
第三凸部                             141
第四凸部                             142
第五凸部                             143
第五壁                               15
第六壁                               16
第一空间                             17
第一电芯组件                         20
第一电芯                             21
第一壳体                             211
第一主体部                           2111
第一封边部                           2112
第一侧封部                           21121
第一顶封部                           21122
第一部分                             2113
第二部分                             2114
第一电极端子                         212
第一弯折段                           2121
第一连接段                           2122
第三电极端子                         213
第三弯折段                           2131
第三连接段                           2132
第一电极组件                         214
第一绝缘件                           22
第一通道                             221
第一结构件                           30
第一底板                             31
第一区域                             311
第二区域                             312
第一侧板                             32
第二侧板                             33
第二凸部                             34
第一凸部                             35
第三通孔                             361
第四通孔                             362
第五通孔                             363
第一通孔                             364
第二通孔                             365
凹陷区域                             37
第一弹性件                           41
第二弹性件                           42
第二电芯组件                         60
第二电芯                             61
第二壳体                             611
第二主体部                           6111
第二封边部                           6112
第二侧封部                           61121
第二顶封部                           61122
第三部分                             6113
第四部分                            6114
第二电极端子                         612
第二弯折段                           6121
第二连接段                           6122
第四电极端子                         613
第四弯折段                           6131
第四连接段                           6132
第二电极组件                          614
第二绝缘件                           62
第二通道                             621
串联模组                             70
总正电极端子                         81
总负电极端子                         82
第一连接件                           83
第二连接件                           84
导电件                               90
用电设备                             200
第一方向                             X
第二方向                             Y
第三方向                               Z
如下具体实施方式将结合上述附图进一步说明本申请。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行描述，显然，所描述的实施例仅是本申请一部分实施例，而不是全部的实施例。
需要说明的是，当一个元件被认为是“连接”另一个元件，它可以是直接连接到另一个元件或者可能同时存在居中设置的元件。当一个元件被认为是“设置在”另一个元件，它可以是直接设置在另一个元件上或者可能同时存在居中设置的元件。“底、侧”等用来解释说明书，不对本申请有限制。
除非另有定义，本文所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同。本文中在本申请的说明书中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本申请。本文所使用的术语“和/或”包括一个或多个相关的所列项目的任意的和所有的组合。
现有的电化学装置中，电芯在使用过程中会发生膨胀，需要在电芯膨胀时给电芯施加压力，提高电化学装置的使用寿命。
本申请的实施例提供一种电化学装置，包括壳体、第一电芯组件和至少一个第一结构件，壳体包括第一空间，第一电芯组件的至少部分设于第一空间内。第一电芯组件包括多个第一电芯，多个第一电芯沿第一方向堆叠设置。第一结构件与第一电芯组件沿第一方向排列设置，第一结构件包括第一底板、连接第一底板的两个第一侧板，两个第一侧板沿第二方向间隔设置，第二方向与第一方向垂直，两个第一侧板与壳体固定连接。
上述电化学装置中，第一结构件沿第一方向设于第一电芯组件的一侧，第一底板为第一电芯组件提供膨胀空间，可对第一电芯施加压力，提升第一电芯组件的寿命。
下面结合附图，对本申请的实施例作进一步的说明。
如图1、图2和图3所示，本申请的实施方式提供一种电化学装置100，包括壳体10、第一电芯组件20和至少一个第一结构件30，壳体10包括第一空间17，第一电芯组件20的至少部分设于第一空间17内。第一电芯组件20包括多个第一电芯21，多个第一电芯21沿第一方向X堆叠设置。第一结构件30与第一电芯组件20沿第一方向X排列设置。第一结构件30包括第一底板31和两个第一侧板32，两个第一侧板32沿第二方向Y间隔设置，第一底板31设于两个第一侧板32之间并连接两个第一侧板32，两个第一侧板32与壳体10固定连接。其中，第二方向Y与第一方向X垂直。第一底板31连接于第一电芯组件20，沿第一方向X，第一底板31能够沿背离第一电芯组件 20的方向发生变形。第一底板31为第一电芯组件20提供膨胀空间，可对第一电芯21施加压力，提升第一电芯组件20的寿命。
在一实施例中，壳体10包括第一壁11、第二壁12、第三壁13和第四壁14，第一壁11和第二壁12沿第二方向Y间隔设置，第三壁13和第四壁14沿垂直于第一方向X和第二方向Y的第三方向Z间隔设置，第三壁13和第四壁14均连接第一壁11和第二壁12。在一实施例中，第一壁11、第二壁12、第三壁13和第四壁14形成第一空间17。
在一实施例中，两个第一侧板32中的一个与第一壁11固定连接，两个第一侧板32中的另一个与第二壁12固定连接。可选的，第一侧板32和第一壁11通过紧固件固定连接，比如螺钉。可选的，第一侧板32和第二壁12通过紧固件固定连接，比如螺钉。第一电芯组件20在膨胀时，第一电芯组件20挤压第一底板31，使第一底板31发生变形，第一底板31对第一电芯组件20施加压力。
在一实施例中，两个第一侧板32中的一个与第三壁13固定连接，两个第一侧板32中的另一个与第四壁14固定连接。可选的，第一侧板32和第三壁13通过紧固件固定连接，比如螺钉。可选的，第一侧板32和第四壁14通过紧固件固定连接，比如螺钉。第一电芯组件20在膨胀时，第一电芯组件20挤压第一底板31，使第一底板31发生变形，第一底板31对第一电芯组件20施加压力。
在一实施例中，电化学装置100包括两个第一结构件30，两个第一结构件30沿第一方向X设于第一电芯组件20的两侧，并均连接于第一电芯组件20和壳体10。两个第一结构件30能够配合对第一电芯组件20施加压力，进一步提升第一电芯组件20的寿命。
如图4和图5所示，在一实施例中，壳体10还包括第五壁15，沿第一方向X，第五壁15设于一个第一结构件30背离第一电芯组件20的一侧，第五壁连接第一壁11、第二壁12、第三壁13和第四壁14。
在一实施例中，壳体10还包括第六壁16，沿第一方向X，第五壁15和第六壁16间隔设置，第五壁15和第六壁16分别设于第一电芯组件20的两侧，第五壁15设于一个第一结构件30背离第一电芯组件20的一侧，第六壁16设于另一个第一结构件30背离第一电芯组件20的一侧，第五壁15和第六壁16均连接第一壁11、第二壁12、第三壁13和第四壁14。
在一实施例中，同一个第一结构件30中，一个第一侧板32与第一壁11和第五壁15固定连接，另一个第一侧板32与第二壁12和第五壁15固定连接。可选的，第一侧板32与第一壁11和第五壁15通过紧固件固定连接，比如螺钉。可选的，第一侧板32与第二壁12和第五壁15通过紧固件固定连接，比如螺钉。
在一实施例中，同一个第一结构件30中，一个第一侧板32与第一壁11和第六壁16固定连接，另一个第一侧板32与第二壁12和第六壁16固定连 接。可选的，第一侧板32与第一壁11和第六壁16通过紧固件固定连接，比如螺钉。可选的，第一侧板32与第二壁12和第六壁16通过紧固件固定连接，比如螺钉。
如图2、图3、图6和图7所示，在一实施例中，从第三方向Z上观察，同一个第一结构件30中，两个第一侧板32位于第一底板31背离第一电芯组件20的一侧。
同一个第一结构件30的两个第一侧板32位于第一底板31背离第一电芯组件20的一侧，使得第一底板31与两个第一侧板32形成开口背离第一电芯组件20的凹陷区域37，凹陷区域37为第一电芯组件20提供变形空间的同时，也减少第一底板31的变形对电化学装置100外廓形状的影响。
在一实施例中，沿第三方向Z观察，第一侧板32沿第一方向X延伸设置，第一侧板32与第一底板31相互垂直。在一实施例中，沿第三方向Z观察，第一侧板32与第一底板31呈夹角设置。
在一实施例中，在第一方向X上，第一侧板32的部分位于第一底板31背离第一电芯组件20的一侧，第一侧板32的部分位于第一底板31靠近第一电芯组件20的一侧(图未示)。
在一实施例中，第一结构件30为钣金件，通过钣金折弯工艺一体制成。在一实施例中，第一底板31和第一侧板32通过焊接形成第一结构件30。
在一实施例中，沿第二方向Y上，两个第一侧板32对称的连接于第一底板31的两端。
在一实施例中，沿第一方向X，第一底板31和第一侧板32的边缘存在第一距离d1。当第一底板31沿第一方向X发生变形时，第一距离d1有利于减少第一底板31的变形对壳体10的影响，减少对电化学装置100外廓形状的影响。本申请中，第一距离d1是指，沿第一方向X，在同一个第一结构件30中，第一底板31背离第一电芯组件20的一侧面与第一侧板32背离第一电芯组件20的端部之间的距离。
在一实施例中，电化学装置100中第一结构件30的数量为一个，d1≥n*d0*16％，其中，n为第一电芯组件20中第一电芯21的数量，d0为每个第一电芯21沿第一方向X上的长度。当第一电芯组件20中的所有第一电芯21在第一方向X上的长度发生不超过16％的膨胀时，沿第一方向X，第一电芯组件20挤压第一底板31，使第一底板31发生的变形量不超过第一距离d1，可减少第一底板31的变形对壳体10的影响，减少对电化学装置100外廓形状的影响。
在一实施例中，电化学装置100中第一结构件30的数量为两个，d1≥n*d0*8％。当第一电芯组件20中的所有第一电芯21在第一方向X上的长度发生不超过16％的膨胀时，沿第一方向X，第一电芯组件20挤压两侧的第一底板31，使两个第一底板31发生的变形量不超过第一距离d1，可减少第一底板31的变形对壳体10的影响，减少对电化学装置100外廓形状的影响。
在一实施例中，第一结构件30还包括两个与第一底板31连接的第二侧板33，两个第二侧板33沿第三方向Z间隔设置。第二侧板33有利于增强第一底板31的结构刚度，提高第一底板31抵抗变形的能力，提高第一底板31抵抗第一电芯组件20膨胀的能力，在一实施例中，两个第二侧板33均沿第二方向Y延伸设置。在一实施例中，两个第二侧板33分别设于第一底板31沿第三方向Z上的两端。
在一实施例中，第二侧板33位于第一底板31背离第一电芯组件20的一侧。在一实施例中，在第一方向X上，第二侧板33的部分位于第一底板31背离第一电芯组件20的一侧，第二侧板33的部分位于第一底板31靠近第一电芯组件20的一侧。在一实施例中，第一底板31、两个第二侧板33和两个第一侧板32形成开口背离第一电芯组件20的凹陷区域37。
在一实施例中，第一结构件30通过钣金工艺形成第二侧板33。在一实施例中，第二侧板33通过焊接连接于第一底板31。
在一实施例中，两个第二侧板33中的一个连接第三壁13，两个第二侧板33中的另一个连接第四壁14，有利于增强第一结构件30连接壳体10的稳定性，提高电化学装置100的抗振性能，进一步提高第一底板31抵抗变形的能力。
在一实施例中，在第一方向X上，第二侧板33伸出于第一底板31的长度与第一侧板32伸出于第一底板31的长度相等。在一实施例中，在第一方向X上，第二侧板33伸出于第一底板31的长度大于第一侧板32伸出于第一底板31的长度。在一实施例中，在第一方向X上，第二侧板33伸出于第一底板31的长度小于第一侧板32伸出于第一底板31的长度。
在一实施例中，在第一方向X上观察，第一侧板32和第二侧板33相离。在一实施例中，沿第一方向X，两个第一侧板32的投影与两个第二侧板33的投影均相离。当第一结构件30变形过大导致第一侧板32和第二侧板33中的任意一个发生损坏时，损坏的侧板与其它侧板相离，能够减少对其它侧板的影响。
在一实施例中，在第一电芯组件20未发生膨胀时，第一结构件30已经向第一电芯组件20施加压力，有利于提高第一电芯组件20连接壳体10的稳定性，提高电化学装置100的抗振性能。
在一实施例中，在第一电芯组件20未发生膨胀时，第一结构件30在第一方向X上连接第一电芯组件20，第一结构件30未向第一电芯组件20施加压力。
在一实施例中，电化学装置100还包括第一弹性件41，第一弹性件41设于第一底板31和第一电芯组件20之间，并连接第一底板31和第一电芯组件20。第一弹性件41能够起到防护作用，减少第一底板31对相邻的第一电芯21的影响，并且，第一弹性件41还能够起到弹性缓冲的作用，在第一电芯组件20膨胀变形时与第一底板31配合为第一电芯组件20施加压力。可选 的，第一弹性件41为泡棉。
在一实施例中，沿第一方向X，第一电芯组件20中任意相邻的两个第一电芯21接触设置。在一实施例中，沿第一方向X，第一电芯组件20中至少两个相邻的第一电芯21接触设置。在一实施例中，电化学装置100还包括第一填充件(图未示)，沿第一方向X，第一填充件设于相邻的两个第一电芯21之间，并接触连接两个第一电芯21。第一填充件能够发生弹性变形，第一填充件不仅能够起到缓冲防护的作用，减少电化学装置100晃动时相邻的两个第一电芯21相互冲击的影响，还能够吸收第一电芯21的膨胀挤压力，减小第一电芯21膨胀对第一电芯组件20外形的影响。可选的，第一填充件的数量为多个，部分相邻的两个第一电芯21之间设有第一填充件，部分相邻的两个第一电芯21直接接触连接。可选，第一填充件包括泡棉、弹簧、气囊和钣金件中的任一种。
如图8和图9所示，在一实施例中，第一电芯21为软包电芯。在其他实施例中，第一电芯21也可以为硬壳电芯(图未示)。
为了便于理解及描述，本申请中所述电芯均以软包电芯为例做进一步的说明。
第一电芯21包括第一壳体211、第一电极组件214、第一电极端子212和第三电极端子213，第一电极组件214设于第一壳体211内部，第一电极端子212和第三电极端子213均连接于第一电极组件214，并伸出于第一壳体211。
第一电极端子212和第三电极端子213中的其中一个为正电极端子，另一个为负电极端子。
第一电极组件214包括正极片、负极片和隔膜(图未示)，隔膜设于正极片和负极片之间，正极片、隔膜和负极片卷绕或层叠设置形成第一电极组件214，第一电极端子212和第三电极端子213中的一个连接于正极片，另一个连接于负极片。
在一实施例中，第一壳体211包括相互连接的第一部分2113和第二部分2114，第一部分2113和第二部分2114连接后，可形成能够容纳第一电极组件214的内部空间。
在一实施例中，第一壳体211包括第一主体部2111和第一封边部2112，第一封边部2112连接于第一主体部2111并从第一主体部2111延伸，第一电极组件214设于第一主体部2111内部，第一电极端子212和第三电极端子213从第一封边部2112伸出。在一实施例中，第一封边部2112包括相互连接的第一侧封部21121和第一顶封部21122，第一电极端子212和第三电极端子213从第一顶封部21122伸出，第一顶封部21122位于第一壳体211沿第二方向Y上的端部，第一侧封部21121位于第一壳体211沿第三方向Z上的端部。
在一实施例中，第一电极端子212和第三电极端子213分别位于第一主 体部2111沿第二方向Y上相对的两端。第一顶封部21122的数量为两个，两个第一顶封部21122分别位于第一主体部2111沿第二方向Y上相对的两侧，每一第一顶封部21122均连接两个第一侧封部21121，第一电极端子212从一个第一顶封部21122伸出，第三电极端子213从另一个第一顶封部21122伸出。在其他实施例中，第一电极端子212和第三电极端子213位于第一主体部2111沿第二方向Y上的同侧(图未示)。
如图2、图3和图10所示，在一实施例中，在第一方向X上，第一壳体211的投影与第一底板31的投影至少部分重叠，当第一电芯组件20发生膨胀变形时，靠近第一结构件30的第一壳体211能够作用于第一底板31，同时，第一底板31能够为第一壳体211提供压力，有利于延长第一电芯组件20的使用寿命。可选的，在第一方向X上，第一壳体211的投影位于第一底板31的投影内。
在一实施例中，第一结构件30还包括两个连接于第一底板31的第一凸部35，两个第一凸部35均位于两个第一侧板32之间，并沿第二方向Y间隔设置。两个第一凸部35能够吸收部分第一底板31变形产生的拉扯力，有利于减少第一底板31变形对两个第一侧板32的影响，还有利于增强第一底板31的结构刚度，提高第一底板31抵抗变形的能力。可选的，一个第一凸部35靠近于一个第一侧板32，另一个第一凸部35靠近于另一个第一侧板32。
在一实施例中，沿第一方向X，第一电极组件214的投影与两个第一凸部35的投影均相离，有利于减小对第一电芯组件20膨胀的影响。
在一实施例中，第一结构件30还包括设于第一底板31的第一通孔364和第二通孔365。在一实施例中，沿第一方向X，第一电极组件214的投影与第一通孔364的投影相离，有利于减小对第一电芯组件20膨胀的影响。在一实施例中，沿第一方向X，第一电极组件214的投影与第二通孔365的投影相离，有利于减小对第一电芯组件20膨胀的影响。
在一实施例中，第一通孔364和第二通孔365位于两个第一凸部35之间，第一通孔364靠近于一个第一凸部35，第二通孔365靠近于另一个第一凸部35。
在一实施例中，第一通孔364的数量为多个，多个第一通孔364沿第三方向Z间隔设置，可选的，第一通孔364的数量为两个。在一实施例中，第一通孔364的数量为一个(图未示)，一个第一通孔364沿第三方向Z延伸设置。
在一实施例中，第二通孔365的数量为多个，多个第二通孔365沿第三方向Z间隔设置，可选的，第二通孔365的数量为两个。在一实施例中，第二通孔365的数量为一个(图未示)，一个第二通孔365沿第三方向Z延伸设置。
在一实施例中，沿第一方向X，第一电极组件214的投影与第一通孔364的投影相离，有利于减小对第一电芯组件20膨胀的影响。
在一实施例中，沿第一方向X，第一电极组件214的投影与第二通孔365的投影相离，有利于减小对第一电芯组件20膨胀的影响。
在一实施例中，第二侧板33与第一底板31的连接处设有多个第三通孔361，多个第三通孔361沿第二方向Y间隔设置。第二侧板33与第一底板31的连接处设置第三通孔361，有利于弱化第一底板31的结构刚度，减小对第一电芯组件20均匀膨胀的影响。
如图11、图12和图13所示，在一实施例中，电化学装置100还包括第二电芯组件60，第二电芯组件60的至少部分设于第一空间17内，并与第一电芯组件20沿第二方向Y排列设置，第二电芯组件60包括多个第二电芯61，多个第二电芯61沿第一方向X堆叠设置。
在一实施例中，沿第一方向X上，第二电芯组件60与第一电芯组件20位于第一结构件30的同一侧，并连接第一结构件30。在一实施例中，沿第一方向X上，第二电芯组件60位于两个第一结构件30之间，第二电芯组件60的两端分别连接两个第一结构件30的第一底板31。第一底板31为第二电芯组件60提供膨胀空间，可对第二电芯施加压力，提升第一电芯组件20的寿命。
在一实施例中，电化学装置还包括第二弹性件42，第二弹性件42设于第一底板31和第二电芯组件60之间，并连接第一底板31和第二电芯组件60。第二弹性件42能够起到防护作用，减少第一底板31对相邻的第二电芯61的影响，并且，第二弹性件42还能够起到弹性缓冲的作用，在第二电芯组件60膨胀变形时与第一底板31配合为第二电芯组件60施加压力。可选的，第二弹性件42为泡棉。
在一实施例中，沿第一方向X，第二电芯组件60中任意相邻的两个第二电芯61接触设置。在一实施例中，沿第一方向X，第二电芯组件60中至少两个相邻的第二电芯61接触设置。在一实施例中，电化学装置100还包括第二填充件(图未示)，沿第一方向X，第二填充件设于相邻的两个第二电芯61之间，并接触连接两个第二电芯61。第二填充件能够发生弹性变形，第二填充件不仅能够起到缓冲防护的作用，减少电化学装置100晃动时相邻的两个第二电芯61相互冲击的影响，还能够吸收第二电芯61的膨胀挤压力，减小第二电芯61膨胀对第二电芯组件60外形的影响，在一实施例中，第二填充件的数量为多个，部分相邻的两个第二电芯61之间设有第二填充件，部分相邻的两个第二电芯61直接接触连接。可选，第二填充件包括泡棉、弹簧、气囊和钣金件中的任一种。
如图14和图15所示，第二电芯61包括第二壳体611、第二电极组件614、第二电极端子612和第四电极端子613，第二电极组件614设于第二壳体611内部，第二电极端子612和第四电极端子613均连接于第二电极组件614并伸出于第二壳体611。
第二电极端子612和第四电极端子613中的其中一个为正电极端子，第 二电极端子612和第四电极端子613中的另一个为负电极端子。
第二电极组件614包括正极片、负极片和隔膜(图未示)，隔膜设于正极片和负极片之间，正极片、隔膜和负极片卷绕或层叠设置形成第二电极组件614，第二电极端子612和第四电极端子613中的一个连接于负极片，第二电极端子612和第四电极端子613中的另一个连接于正极片。
在一实施例中，第二壳体611包括相互连接的第三部分6113和第四部分6114，第三部分6113和第四部分6114连接后，可形成能够容纳第二电极组件614的内部空间。
在一实施例中，第二壳体611包括第二主体部6111和第二封边部6112，第二封边部6112连接于第二主体部6111并从第二主体部6111延伸，第二电极组件614设于第二主体部6111内部，第二电极端子612和第四电极端子613从第二封边部6112伸出。在一实施例中，第二封边部6112包括相互连接的第二侧封部61121和第二顶封部61122，第二电极端子612和第四电极端子613从第二顶封部61122伸出，第二顶封部61122位于第二壳体611沿第二方向Y上的端部，第二侧封部61121位于第二壳体611沿第三方向Z上的端部。
在一实施例中，第二电极端子612和第四电极端子613分别位于第二电芯61沿第二方向Y上相对的两端。第二顶封部61122的数量为两个，两个第二顶封部61122分别位于第二主体部6111沿第二方向Y上相对的两侧，每一第二顶封部61122均连接两个第二侧封部61121，第二电极端子612从一个第二顶封部61122伸出，第四电极端子613从另一个第二顶封部61122伸出。在其他实施例中，第二电极端子612和第四电极端子613位于第二电芯61沿第二方向Y上的同侧(图未示)。
作为示例性的，下面以第二电极端子612和第四电极端子613分别位于第二电芯61沿第二方向Y上相对的两端为例作进一步的说明。
如图12、图13、图16和图17所示，在一实施例中，在第一方向X上，第二壳体611的投影与第一底板31的投影至少部分重叠，当第二电芯组件60发生膨胀变形时，靠近第一结构件30的第二壳体611作用于第一底板31，同时，第一底板31为相邻的第二壳体611提供压力，有利于提升第二电芯组件60的使用寿命。可选的，在第一方向X上，第二壳体611的投影位于第一底板31的投影内。
在一实施例中，沿第一方向X，第二电极组件614的投影与两个第一凸部35的投影均相离，有利于减小对第二电芯组件60膨胀的影响。
在一实施例中，沿第一方向X，第二电极组件614的投影与第一通孔364的投影相离，有利于减小对第二电芯组件60膨胀的影响。在一实施例中，沿第一方向X，第二电极组件614的投影与第二通孔365的投影相离，有利于减小对第二电芯组件60膨胀的影响。
在一实施例中，第一结构件30还包括连接于第一底板31的第二凸部34， 第二凸部34设于第一底板31，第二凸部34位于两个第一侧板32之间，第二凸部34位于两个第一凸部35之间，第二凸部34有利于增强第一底板31的结构刚度，提高第一底板31抵抗变形的能力。可选的，第二凸部34设于第一底板31背离第一电芯组件20的一侧。
在一实施例中，第一底板31通过冲压工艺形成第二凸部34。在一实施例中，第二凸部34通过焊接连接于第一底板31。
在一实施例中，第一底板31上具有第一区域311和第二区域312，第一区域311位于第二凸部34与一个第一凸部35之间，第二区域312位于第二凸部34与另一个第一凸部35之间。在第一方向X上，第一区域311的投影与第一电极组件214的投影至少部分重叠，第二区域312的投影与第二电极组件614的投影至少部分重叠。
在一实施例中，沿第二方向Y上，第二凸部34位于第一底板31的中间位置，有利于使第一区域311和第二区域312的结构刚度近似相同，从而使第一结构件30作用于第一电芯组件20和第二电芯组件60的作用力大致相同。可选的，在第一方向X上，第一电极组件214的投影位于第一区域311的投影内，第二电极组件614的投影位于第二区域312的投影内。
在一实施例中，第一结构件30上还设有第四通孔362和第五通孔363，第四通孔362设于第一区域311，第五通孔363设于第二区域312。第四通孔362和第五通孔363有利于弱化第一底板31的结构刚度，降低第一底板31抵抗变形的能力，可选的，第四通孔362靠近于第二凸部34。可选的，第五通孔363靠近于第二凸部34。
请结合参阅图12、图13和图18，第一电芯组件20和第二电芯组件60在膨胀时，第一电芯组件20和第二电芯组件60沿第一方向X挤压第一底板31，使第一底板31发生变形。在一实施例中，沿第一方向X上，变形的第一底板31不超出两个第一侧板32的边缘，有利于减少第一底板31的变形对电化学装置100外廓形状的影响。
如图3、图19和图20所示，在一实施例中，第一电芯组件20还包括第一绝缘件22，第一绝缘件22粘接于每一个第一电芯21的至少部分表面上，具体的，第一绝缘件22粘接于第一电极端子212的部分表面、第三电极端子213的部分表面和第一壳体211的至少部分表面。
第一绝缘件22覆盖于第一电极端子212的部分表面和第三电极端子213的部分表面，有利于起到支撑和防护作用，降低第一电极端子212和第三电极端子213受损的风险，提高绝缘效果，降低相邻的电极端子发生短路的风险。第一绝缘件22的设置，有利于减少针对第一电极端子212和第三电极端子213区域的填充物的数量，节约电化学装置100的成本。
第一绝缘件22覆盖于第一壳体211的至少部分表面，有利于保护第一壳体211，降低第一壳体211损伤的风险。在一实施例中，第一绝缘件22完全覆盖第一顶封部21122。在一实施例中，第一绝缘件22覆盖于第一主体部2111 的部分表面上。在一实施例中，第一绝缘件22完全覆盖第一壳体211的表面。
在一实施例中，在第一方向X上，第一电极组件214的投影与第一绝缘件22的投影相离(如图20所示)，有利于减小对第一电极组件214膨胀的影响，降低第一电极组件214膨胀时对第一电极端子212和第三电极端子213的影响。
在一实施例中，在第一方向X上，第一绝缘件22的投影位于第一底板31的投影内，在第一电芯组件20膨胀时，第一底板31对第一绝缘件22和第一壳体211施加压力，有利于减少第一壳体211变形对第一绝缘件22拉扯的影响，减少第一壳体211变形拉扯第一绝缘件22对第一电极端子212和第三电极端子213的影响。
在一实施例中，第一绝缘件22通过将绝缘材料注塑成型于第一电芯21的部分表面，有利于简化第一绝缘件22连接第一电芯21的工艺，节约电化学装置100的生产制造成本。
在一实施例中，第一绝缘件22通过将绝缘材料灌注的方式形成于第一电芯21的部分表面，有利于简化第一绝缘件22连接第一电芯21的工艺，节约电化学装置100的生产制造成本。比如，灌注灌封胶。
在一实施例中，第一电芯组件20包括两个第一电芯21，两个第一电芯21沿第一方向X堆叠设置，第一绝缘件22覆盖于两个第一电芯21的部分表面。
在其他实施例中，第一电芯组件20中第一电芯21的数量也可以为三个、四个、五个或更多个(图未示)。
作为示例性的，下面以第一电芯组件20中第一电芯21的数量为两个为例作进一步的说明。
在第一电芯组件20中，两个第一壳体211沿第一方向X堆叠设置，两个第一电芯21并联或串联的连接。在一实施例中，两个第一电芯21串联的连接。在一实施例中，两个第一电芯21并联的连接。
作为示例性的，下面以两个第一电芯21并联的连接为例作进一步的说明。
在第一电芯组件20中，两个第一电极端子212连接后部分显露于第一绝缘件22，两个第三电极端子213连接后部分显露于第一绝缘件22。
在一实施例中，第一绝缘件22包覆电极端子的部分形成第一通道221，第一通道221沿第三方向Z贯穿第一绝缘件22，第一通道221有利于增大第一绝缘件22的表面积，并形成供冷却物通过的散热通道，提高第一绝缘件22的散热效率，提高第一电芯21的散热速率。
如图2和图3所示，电化学装置100包括多个第一电芯组件20。在一实施例中，多个第一电芯组件20依次串联的连接。在一实施例中，多个第一电芯组件20并联的连接。在一实施例中，多个第一电芯组件20通过串联与并联结合的方式连接。
作为示例性的，下面以多个第一电芯组件20依次串联连接为例作进一步的说明。
在一实施例中，多个第一电芯组件20依次串联后，沿第一方向X上，位于最外侧的两个第一电芯组件20各有一个显露的电极端子未与其第一电芯组件20的电极端子连接，构成电化学装置100的总正电极端子81和总负电极端子82。
电化学装置100还包括电路板(图未示)，电路板设于壳体10内，电路板通过连接总正电极端子81和总负电极端子82连接于第一电芯组件20，电路板能够控制第一电芯组件20的充电和放电。在一实施例中，电路板包括BMS组件(Battery Management System)，BMS组件包括多个电子元器件，多个电子元器件能够实现对电芯的数据采集、控制、保护、通讯、电量计算、信号传输、电能传输等功能。
在一实施例中，电化学装置100还包括第一连接件83和第二连接件84，第一连接件83连接总正电极端子81和电路板，第二连接件84连接总负电极端子82和电路板，使第一电芯组件20连接于电路板。在一实施例中，第一连接件83的材质包括铜、铝、镍和镍合金中的至少一种。在一实施例中，第二连接件84的材质包括铜、铝、镍和镍合金中的至少一种。
在一实施例中，以相邻的两个第一电芯组件20为例，相邻的两个第一电芯组件20通过端部的第一电极端子212和第三电极端子213连接实现串联连接，在一实施例中，第一电极端子212和第三电极端子213相向弯折的连接。
在一实施例中，电化学装置100还包括导电件90，第一电极端子212和第三电极端子213相向弯折并均连接于导电件90，第一电极端子212和第三电极端子213通过连接导电件90实现电性连接。在一实施例中，第一电极端子212和第三电极端子213通过焊接连接于导电件90，比如激光焊节或超声焊接。
如图13、图21和图22所示，在一实施例中，第二电芯组件60还包括第二绝缘件62，第二绝缘件62粘接于每一个第二电芯61的至少部分表面上，具体的，第二绝缘件62粘接于第二电极端子612的部分表面、第四电极端子613的部分表面和第二壳体611的至少部分表面。
第二绝缘件62覆盖于第二电极端子612的部分表面和第四电极端子613的部分表面，有利于起到支撑、防护作用，降低第二电极端子612和第四电极端子613受损的风险，提高绝缘效果，降低相邻的电极端子发生短路的风险。第二绝缘件62的设置，有利于减少针对第二电极端子612和第四电极端子613区域的填充物的数量，节约电化学装置100的成本。
第二绝缘件62覆盖于第二壳体611的至少部分表面，有利于保护第二壳体611，降低第二壳体611损伤的风险。在一实施例中，第二绝缘件62完全覆盖第二顶封部61122。在一实施例中，第二绝缘件62覆盖于第二主体部6111的部分表面上。在一实施例中，第二绝缘件62完全覆盖第二壳体611的表面。
在一实施例中，在第一方向X上，第二电极组件614的投影与第二绝缘件62的投影相离(如图22所示)，有利于减小对第二电极组件614膨胀的影响，降低第二电极组件614膨胀时对第二电极端子612和第四电极端子613的影响。
在一实施例中，在第一方向X上，第二绝缘件62的投影位于第一底板31的投影内，在第二电芯组件60膨胀时，第一底板31对第二绝缘件62和第二壳体611施加压力，有利于减少第二壳体611变形对第二绝缘件62拉扯的影响，减少第二壳体611变形拉扯第二绝缘件62对第二电极端子612和第四电极端子613的影响。
在一实施例中，第二绝缘件62通过将绝缘材料注塑成型于第二电芯61的部分表面，有利于简化第二绝缘件62连接第二电芯61的工艺，节约电化学装置100的生产制造成本。
在一实施例中，第二绝缘件62通过将绝缘材料灌注的方式形成于第二电芯61的部分表面，有利于简化第二绝缘件62连接第二电芯61的工艺，节约电化学装置100的生产制造成本。比如，灌注灌封胶。
在一实施例中，第二电芯组件60包括两个第二电芯61，两个第二电芯61沿第一方向X堆叠设置，第二绝缘件62覆盖于两个第二电芯61的部分表面。
在其他实施例中，第二电芯组件60中第二电芯61的数量也可以为三个、四个、五个或更多个(图未示)。
作为示例性的，下面以第二电芯组件60中第二电芯61的数量为两个为例作进一步的说明。
在第二电芯组件60中，两个第二壳体611沿第一方向X堆叠设置，两个第二电芯61并联或串联的连接。在一实施例中，两个第二电芯61串联的连接。在一实施例中，两个第二电芯61并联的连接。
作为示例性的，下面以两个第二电芯61并联的连接为例作进一步的说明。
在第二电芯组件60中，两个第二电极端子612连接后部分显露于第二绝缘件62，两个第四电极端子613连接后部分显露于第二绝缘件62。
在一实施例中，第二绝缘件62包覆电极端子的部分形成第二通道621，第二通道621沿第三方向Z贯穿第二绝缘件62，第二通道621有利于增大第二绝缘件62的表面积，并形成供冷却物通过的散热通道，提高第二绝缘件62的散热效率，提高第二电芯61的散热速率。
如图12和图13所示，电化学装置100包括多个第二电芯组件60，多个第一电芯组件20与多个第二电芯组件60连接。在一实施例中，多个第一电芯组件20与多个第二电芯组件60依次串联的连接。在一实施例中，多个第一电芯组件20与多个第二电芯组件60并联的连接。在一实施例中，多个第一电芯组件20和第二电芯组件60通过串联与并联结合的方式连接。
作为示例性的，下面以多个第一电芯组件20与多个第二电芯组件60依次串联连接为例作进一步的说明。
在一实施例中，第一电芯组件20的数量与第二电芯组件60的数量相等，且沿第二方向Y一一对应，可选的，第一电芯组件20和第二电芯组件60的数量均为八个。在其他实施例中，第一电芯组件20的数量也可以与第二电芯组件60的数量不等(图未示)。
在一实施例中，沿第二方向Y，相对的第一电芯组件20与第二电芯组件60串联的连接，沿第二方向Y相对的一个第一电芯组件20与一个第二电芯组件60形成一个串联模组70，第一电芯组件20和第二电芯组件60构成八个串联模组70，八个串联模组70沿第一方向X依次堆叠设置，相邻的两个串联模组70串联连接。八个串联模组70依次串联后，沿第一方向X上，第一个串联模组70和第八个串联模组70中各有一个显露的电极端子未与其他串联模组70的电极端子连接，构成电化学装置100的总正电极端子81和总负电极端子82。
电路板通过连接总正电极端子81和总负电极端子82连接于第一电芯组件20和第二电芯组件60，电路板能够控制第一电芯组件20和第二电芯组件60的充电和放电。
在一实施例中，以相邻的两个串联模组70为例，相邻的两个串联模组70通过端部的电极端子连接实现串联连接，在一实施例中，两个电极端子相向弯折的连接。
在一实施例中，相向弯折的两个电极端子连接于同一个导电件90，两个电极端子通过连接导电件90实现电性连接。在一实施例中，两个电极端子通过焊接连接于导电件90，比如激光焊节或超声焊接。
如图23所示，以一个串联模组70为例，在一实施例中，第一电极端子212和第二电极端子612的极性相反，第一电芯组件20的第一电极端子212连接于第二电芯组件60的第二电极端子612。
在一实施例中，第一电极端子212包括第一弯折段2121和第一连接段2122，第一弯折段2121和第一连接段2122伸出于第一绝缘件22，第一弯折段2121连接第一壳体211和第一连接段2122，第一弯折段2121能够沿第一方向X发生变形，第一连接段2122用于连接其他电极端子或导电件90。在一实施例中，第一连接段2122连接于第二电极端子612。
当第一电芯组件20与第二电芯组件60沿第一方向X发生相对位移时，第一弯折段2121有利于缓冲相对位移产生的拉扯力或挤压力，减少第一电芯组件20与第二电芯组件60相对位移产生的拉扯或挤压对第一电极端子212和第二电极端子612的影响。
在一实施例中，第一弯折段2121还能够沿第二方向Y发生变形。当第一电芯组件20与第二电芯组件60沿第二方向Y发生相对位移时，第一弯折段2121有利于缓冲第一电极端子212上的拉扯力或挤压力，减少第一电芯组件 20与第二电芯组件60相对位移对第一电极端子212和第二电极端子612拉扯或挤压的影响。
在一实施例中，第一弯折段2121呈N型、S型、V型和波浪形中的任一种。
在一实施例中，第二电极端子612包括第二弯折段6121和第二连接段6122，第二弯折段6121和第二连接段6122伸出于第二绝缘件62，第二弯折段6121连接第二壳体611和第二连接段6122，第二弯折段6121能够沿第一方向X发生变形，第二连接段6122用于连接其他电极端子或导电件90。在一实施例中，第二连接段6122连接于第一连接段2122。
当第一电芯组件20与第二电芯组件60沿第一方向X发生相对位移时，第二弯折段6121有利于缓冲相对位移产生的拉扯力或挤压力，减少相对位移产生的拉扯或挤压对第一电极端子212和第二电极端子612的影响。
在一实施例中，第二弯折段6121还能够沿第二方向Y发生变形。当第一电芯组件20与第二电芯组件60沿第二方向Y发生相对位移时，第二弯折段6121有利于缓冲第二电极端子612上的拉扯力或挤压力，减少第一电芯组件20与第二电芯组件60相对位移对第一电极端子212和第二电极端子612拉扯或挤压的影响。
在一实施例中，第二弯折段6121呈N型、S型、V型和波浪形中的任一种。
如图24所示，以一个串联模组70为例，在一实施例中，第一电芯组件20的第三电极端子213连接于第二电芯组件60的第四电极端子613。
在一实施例中，第三电极端子213包括第三弯折段2131和第三连接段2132，第三弯折段2131和第三连接段2132伸出于第一绝缘件22，第三弯折段2131连接第一壳体211和第三连接段2132，第三弯折段2131能够沿第一方向X发生变形，第三连接段2132用于连接其他电极端子或导电件90。在一实施例中，第三连接段2132连接于第四电极端子613。
当第一电芯组件20与第二电芯组件60沿第一方向X发生相对位移时，第三弯折段2131有利于缓冲相对位移产生的拉扯力或挤压力，减少相对位移产生的拉扯或挤压对第三电极端子213和第四电极端子613的影响。
在一实施例中，第三弯折段2131还能够沿第二方向Y发生变形。当第一电芯组件20与第二电芯组件60沿第二方向Y发生相对位移时，第三弯折段2131有利于缓冲第三电极端子213上的拉扯力或挤压力，减少第一电芯组件20与第二电芯组件60相对位移对第三电极端子213和第四电极端子613拉扯或挤压的影响。
在一实施例中，第三弯折段2131呈N型、S型、V型和波浪形中的任一种。
在一实施例中，第四电极端子613包括第四弯折段6131和第四连接段6132，第四弯折段6131和第四连接段6132伸出于第二绝缘件62，第四弯折 段6131连接第二壳体611和第四连接段6132，第四弯折段6131能够沿第一方向X发生变形，第四连接段6132用于连接其他电极端子或导电件90。在一实施例中，第四连接段6132连接于第三连接段2132。
当第一电芯组件20与第二电芯组件60沿第一方向X发生相对位移时，第四弯折段6131有利于缓冲相对位移产生的拉扯力或挤压力，减少相对位移产生的拉扯或挤压对第三电极端子213和第四电极端子613的影响。
在一实施例中，第四弯折段6131还能够沿第二方向Y发生变形。当第一电芯组件20与第二电芯组件60沿第二方向Y发生相对位移时，第四弯折段6131有利于缓冲第四电极端子613上的拉扯力或挤压力，减少第一电芯组件20与第二电芯组件60相对位移对第三电极端子213和第四电极端子613拉扯或挤压的影响。
在一实施例中，第四弯折段6131呈N型、S型、V型和波浪形中的任一种。
请继续参阅图12和图13，第四壁14上设有第三凸部141,第三凸部141由第四壁14的表面朝向第三壁13延伸设置。
在一实施例中，沿第二方向Y上，第三凸部141设于第一绝缘件22和第二绝缘件62之间，并连接第一绝缘件22和第二绝缘件62，第三凸部141有利于限制第一电芯21和第二电芯61沿第二方向Y上的相对位移，减少电化学装置100针对第一电芯21和第二电芯61的限位件或填充物的数量，降低电化学装置100的成本。
在一实施例中，第三凸部141的数量为一个，一个第三凸部141沿第一方向X延伸的设置。在一实施例中，第三凸部141的数量为多个，多个第三凸部141沿第一方向X间隔的排列设置。
在一实施例中，第四壁14上设有第四凸部142，第四凸部142由第四壁14的表面朝向第三壁13延伸设置。
在一实施例中，沿第二方向Y上，第四凸部142设于第一壳体211背离第二壳体611的一侧，并连接第一壳体211端部的第一绝缘件22，第四凸部142有利于限制第一电芯21沿第二方向Y上的相对位移，第四凸部142与第三凸部141配合能够限制第一电芯21沿第二方向Y上的位移，减少电化学装置100针对第一电芯21的限位件或填充物的数量，降低电化学装置100的成本。
在一实施例中，第四凸部142的数量为一个，一个第四凸部142沿第一方向X延伸的设置。在一实施例中，第四凸部142的数量为多个，多个第四凸部142沿第一方向X间隔的排列设置。
在一实施例中，第四壁14上设有第五凸部143，第五凸部143由第四壁14的表面朝向第三壁13延伸设置。
在一实施例中，沿第二方向Y上，第五凸部143设于第二壳体611背离第一壳体211的一侧，并连接第二壳体611端部的第二绝缘件62，第五凸部 143有利于限制第二电芯61沿第二方向Y上的相对位移，第五凸部143与第三凸部141配合能够限制第三壳体10沿第二方向Y上的位移，减少电化学装置100针对第二电芯61的限位件或填充物的数量，降低电化学装置100的成本。
在一实施例中，第五凸部143的数量为一个，一个第五凸部143沿第一方向X延伸的设置。在一实施例中，第五凸部143的数量为多个，多个第五凸部143沿第一方向X间隔的排列设置。
在一实施例中，第三壁13上设有第六凸部(图未示)，第六凸部由第三壁13的表面朝向第四壁14延伸设置。在一实施例中，第六凸部与第三凸部141的位置、功能及效果对应，此处不再赘述。
在一实施例中，第三壁13上设有第七凸部(图未示)，第七凸部由第三壁13的表面朝向第四壁14延伸设置。在一实施例中，第七凸部与第四凸部142的位置、功能及效果对应，此处不再赘述。
在一实施例中，第三壁13上设有第八凸部(图未示)，第八凸部由第三壁13的表面朝向第四壁14延伸设置。在一实施例中，第八凸部与第五凸部143的位置、功能及效果对应，此处不再赘述。
在一实施例中，沿第三方向Z上，第四壁14和第三壁13分别连接第一绝缘件22的两端，第四壁14和第三壁13分别连接第二绝缘件62的两端，第四壁14和第三壁13通过配合连接第一绝缘件22和第二绝缘件62，有利于减少针对第一电芯组件20和第二电芯组件60的限位件的数量，节约电化学装置100的成本。
综上所述，本申请的电化学装置100中，第一结构件30沿第一方向X设于第一电芯组件20的一侧，第一结构件30能够通过第一底板31的变形对第一电芯21施加压力，提升第一电芯组件20的使用寿命。
如图25所示，本申请的实施方式还提供一种用电设备200，包括前述任一实施例所述的电化学装置100，电化学装置100可为用电设备200提供电能。电化学装置100通过第一结构件30对第一电芯21施加压力，提升电化学装置100的使用寿命，减少电化学装置100的使用寿命对用电设备200的影响。
在一实施例中，用电设备200包括但不限于无人机、电动两轮车、家用电器和机器人中的任一种。
另外，本领域技术人员还可在本申请精神内做其它变化，当然，这些依据本申请精神所做的变化，都应包含在本申请所公开的范围。

Claims (26)

  1. 一种电化学装置，其特征在于，包括：
    第一电芯组件，所述第一电芯组件包括多个第一电芯，多个所述第一电芯沿第一方向堆叠设置；
    至少一个第一结构件，所述第一结构件与所述第一电芯组件沿所述第一方向排列设置；
    壳体，包括第一空间，所述第一电芯组件的至少部分设于所述第一空间；
    所述第一结构件包括第一底板、连接所述第一底板的两个第一侧板，两个所述第一侧板沿第二方向间隔设置，所述第二方向与所述第一方向垂直；
    两个所述第一侧板与所述壳体固定连接。
  2. 如权利要求1所述的电化学装置，其特征在于，
    所述壳体包括第一壁、第二壁、第三壁和第四壁，所述第一壁和所述第二壁沿所述第二方向间隔设置，所述第三壁和所述第四壁沿第三方向间隔设置，所述第三方向与所述第一方向和所述第二方向均垂直；
    两个所述第一侧板中的一个与所述第一壁固定连接，另一个与所述第二壁固定连接；
    和/或，两个所述第一侧板中的一个与所述第三壁固定连接，两个所述第一侧板中的另一个与所述第四壁固定连接。
  3. 如权利要求2所述的电化学装置，其特征在于，所述壳体还包括第五壁，沿所述第一方向，所述第五壁设于所述第一结构件远离所述第一电芯组件的一侧。
  4. 如权利要求3所述的电化学装置，其特征在于，
    所述电化学装置包括两个所述第一结构件，所述壳体还包括第六壁，所述第六壁和所述第五壁沿所述第一方向间隔设置；
    沿所述第一方向，所述第五壁设于其中一个所述第一结构件远离所述第一电芯组件的一侧，所述第六壁设于另外一个所述第一结构件远离所述第一电芯组件的一侧。
  5. 如权利要求3所述的电化学装置，其特征在于，两个所述第一侧板中的一个与所述第一壁和所述第五壁固定连接。
  6. 如权利要求1所述的电化学装置，其特征在于，
    所述第一结构件的数量为一个；
    沿所述第一方向，所述第一底板和所述第一侧板的边缘存在第一距离d1,满足d1≥n*d0*16％，其中，n为所述第一电芯组件中第一电芯的数量，d0为所述第一电芯沿所述第一方向上的长度。
  7. 如权利要求1所述的电化学装置，其特征在于，
    所述第一结构件的数量为两个，两个所述第一结构件沿所述第一方向分别设于所述第一电芯组件的两侧，并均连接于所述壳体；
    沿所述第一方向，所述第一底板和所述第一侧板的边缘存在第一距离 d1,d1≥n*d0*8％，其中，n为所述第一电芯组件中第一电芯的数量，d0为所述第一电芯沿所述第一方向上的长度。
  8. 如权利要求1所述的电化学装置，其特征在于，所述第一结构件还包括两个设于所述第一底板的第一凸部，两个所述第一凸部位于两个所述第一侧板之间，并沿所述第二方向间隔设置。
  9. 如权利要求8所述的电化学装置，其特征在于，
    所述第一电芯包括第一电芯壳体、第一电极组件、以及连接至所述第一电极组件并且从所述第一电芯壳体伸出的第一电极端子；
    沿所述第一方向，所述第一电极组件和两个所述第一凸部的投影均相离。
  10. 如权利要求8所述的电化学装置，其特征在于，所述第一结构件还包括设于所述第一底板的第一通孔和第二通孔，所述第一通孔和所述第二通孔位于两个所述第一凸部之间。
  11. 如权利要求10所述的电化学装置，其特征在于，
    所述第一电芯包括第一电芯壳体、第一电极组件、以及连接至所述第一电极组件并且从所述第一电芯壳体伸出的第一电极端子；
    沿所述第一方向，所述第一电极组件的投影和所述第一通孔的投影相离，所述第一电极组件的投影和所述第二通孔的投影相离。
  12. 如权利要求1所述的电化学装置，其特征在于，
    所述第一电芯包括第一电芯壳体、第一电极组件、以及连接至所述第一电极组件并且从所述第一电芯壳体伸出的第一电极端子；
    所述电化学装置还包括第一绝缘件，所述第一绝缘件粘接所述第一电芯壳体的至少部分及所述第一电极端子伸出所述第一电芯壳体外的至少部分；
    在所述第一方向上，所述第一电极组件的投影与所述第一绝缘件的投影相离。
  13. 如权利要求12所述的电化学装置，其特征在于，在所述第一方向上，所述第一绝缘件的投影位于所述第一底板的投影内。
  14. 如权利要求1所述的电化学装置，其特征在于，所述第一结构件还包括与所述第一底板连接的两个第二侧板，两个所述第二侧板沿第三方向间隔设置，所述第三方向与所述第一方向和所述第二方向均垂直。
  15. 如权利要求14所述的电化学装置，其特征在于，沿所述第一方向，两个所述第一侧板和两个所述第二侧板投影相离。
  16. 如权利要求14所述的电化学装置，其特征在于，
    所述第一结构件还包括两个设于所述第一底板的第一凸部，两个所述第一凸部位于两个所述第一侧板之间，并沿所述第二方向间隔设置；
    所述第一结构件具有第一区域，所述第一区域位于所述两个第一凸部之间；
    所述第二侧板与所述第一底板的连接处设有第三通孔，所述第三通孔的投影与所述第一区域的投影相离。
  17. 如权利要求1所述的电化学装置，其特征在于，所述电化学装置还包括第二电芯组件，所述第二电芯组件的至少部分设于所述第一空间，并与所述第一电芯组件沿所述第二方向排列设置，所述第二电芯组件包括多个第二电芯，多个所述第二电芯沿所述第一方向堆叠设置；
    沿所述第一方向，所述第一结构件与所述第二电芯组件排列设置。
  18. 如权利要求17所述的电化学装置，其特征在于，
    所述第一结构件还包括两个设于所述第一底板的第一凸部，两个所述第一凸部位于两个所述第一侧板之间，并沿所述第二方向间隔设置；
    所述第二电芯包括第二电芯壳体、第二电极组件、以及连接至所述第二电极组件并且从所述第二电芯壳体伸出的第二电极端子；
    沿所述第一方向，所述第二电极组件和两个所述第一凸部的投影均相离。
  19. 如权利要求18所述的电化学装置，其特征在于，
    所述第一结构件还包括设于所述第一底板的第一通孔和第二通孔，所述第一通孔和所述第二通孔位于两个所述第一凸部之间；
    沿所述第一方向，所述第二电极组件的投影和所述第一通孔的投影相离，所述第二电极组件的投影和所述第二通孔的投影相离。
  20. 如权利要求17所述的电化学装置，其特征在于，
    所述第二电芯包括第二电芯壳体、第二电极组件、以及连接至所述第二电极组件并且从所述第二电芯壳体伸出的第二电极端子；
    所述电化学装置还包括第二绝缘件，所述第二绝缘件包覆所述第二电芯壳体的至少部分及所述第二电极端子伸出所述第二电芯壳体外的至少部分；
    在所述第一方向上，所述第二电极组件的投影与所述第二绝缘件的投影相离。
  21. 如权利要求20所述的电化学装置，其特征在于，在所述第一方向上，所述第二绝缘件的投影位于所述第一底板的投影内。
  22. 如权利要求17所述的电化学装置，其特征在于，
    所述第一结构件还包括第二凸部，所述第二凸部设于所述第一底板，所述第二凸部位于两个所述第一侧板之间；
    所述第一结构件具有第一区域和第二区域，所述第一区域位于所述第二凸部与一个所述第一侧板之间，所述第二区域位于所述第二凸部与另一个所述第一侧板之间；
    在所述第一方向上，所述第一区域的投影与所述第一电极组件的投影至少部分重叠，所述第二区域的投影与所述第二电极组件的投影至少部分重叠。
  23. 如权利要求22所述的电化学装置，其特征在于，
    所述第一结构件上还设有第四通孔和第五通孔，所述第四通孔设于所述第一区域，所述第五通孔设于所述第二区域。
  24. 如权利要求1所述的电化学装置，其特征在于，所述电化学装置还包括第一弹性件，所述第一弹性件设于所述第一底板和所述第一电芯上组件之 间，并连接所述第一底板和所述第一电芯组件。
  25. 如权利要求1所述的电化学装置，其特征在于，沿所述第一方向，多个所述第一电芯中的至少两个相邻的电芯接触设置。
  26. 一种用电设备，其特征在于，包括如权利要求1至25任一项所述的电化学装置。
PCT/CN2022/130599 2022-11-08 2022-11-08 电化学装置及用电设备 Ceased WO2024098248A1 (zh)

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