CN219286613U - Electrochemical device and electronic device - Google Patents
Electrochemical device and electronic device Download PDFInfo
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- CN219286613U CN219286613U CN202223551425.0U CN202223551425U CN219286613U CN 219286613 U CN219286613 U CN 219286613U CN 202223551425 U CN202223551425 U CN 202223551425U CN 219286613 U CN219286613 U CN 219286613U
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Sealing Battery Cases Or Jackets (AREA)
Abstract
The utility model discloses an electrochemical device and an electronic device, wherein the electrochemical device comprises a packaging shell and a partition board, the packaging shell comprises a first shell provided with a first groove and a first skirt edge, and a second shell provided with a second groove and a second skirt edge, the first skirt edge is arranged around the first groove, and the second skirt edge is arranged around the second groove; the partition board is arranged between the first shell and the second shell, and the second skirt edge, the partition board and the first skirt edge are sequentially attached to form an annular sealing edge; the partition plate comprises a third groove; the depth a of the first groove is smaller than the depth b of the second groove. The electrochemical device packaging shell and the separator are sequentially attached to form an annular sealing edge through the first skirt edge, the separator and the second skirt edge. The second groove depth is greater than the first groove depth, and the third groove is seted up to the baffle, and the installation of part in the electrode assembly encapsulation process can be held to the second groove depth scope in the packing shell outside. The assembled component size is prevented from exceeding the package.
Description
Technical Field
The present utility model relates to the field of electrochemistry, and in particular, to an electrochemical device and an electronic device.
Background
Electronic devices are used more frequently, consume more and more power, and become thinner and lighter, which requires batteries with higher energy density and faster charge and discharge capabilities. The series-parallel electrode assembly can realize high voltage and meet the requirements of high-voltage quick charge and high-power discharge.
The current common high-voltage battery is formed by stacking a plurality of single electrode assemblies in series-parallel connection, and the plurality of single electrode assemblies are packaged by a packaging shell, wherein the electrode assemblies, the separator and the electrode assemblies are stacked in sequence in the packaging shell. The separator in the package is typically a non-pit separator, which results in the package's containment skirt being generally located at the medial line of the package's sides, limiting the placement of other components such that the other components protrude above the height of the package's body, and thus the ED (energy density) of the completed assembled electrochemical device may be reduced.
Disclosure of Invention
In view of the above, an object of the present utility model is to provide an electrochemical device and an electronic device.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
an electrochemical device comprising a package case and a separator:
the packaging shell comprises a first shell and a second shell, and the partition board is arranged between the first shell and the second shell;
the first shell comprises a first groove and a first skirt, and the first skirt is arranged around the first groove;
the second shell comprises a second groove and a second skirt, and the second skirt is arranged around the second groove;
the partition plate comprises a third groove, and the second skirt edge, the partition plate and the first skirt edge are sequentially attached to form an annular sealing edge;
the depth a of the first groove is smaller than the depth b of the second groove.
Optionally, in the above electrochemical device, the separator further includes a third skirt disposed around the third groove;
the third skirt edge is positioned between the first skirt edge and the second skirt edge, so that two sides of the partition plate respectively form independent cavities with the first shell and the second shell;
the second skirt edge, the third skirt edge and the first skirt edge are sequentially attached to form an annular sealing edge.
Optionally, in the above electrochemical device, the first skirt, the second skirt, and the third skirt are connected by a sealant.
Optionally, in the above electrochemical device, an electrode assembly is further included in the cavity.
In the above electrochemical device, optionally, the electrode assembly is a wound structure,
the depth c of the third groove is less than half the thickness of the electrode assembly and is not zero;
the third groove has a length smaller than that of the electrode assembly.
In the above electrochemical device, optionally, the electrode assembly is a lamination stack,
the third groove depth is less than the electrode assembly thickness and is not zero;
the third groove has a length greater than a length of the electrode assembly.
Optionally, in the above electrochemical device, the electrode assembly includes a first tab and a second tab having different polarities, and the first tab and the second tab are led out from the annular seal edge.
Optionally, in the above electrochemical device, the first tab and the second tab of the same electrode assembly are sequentially arranged along the length direction of the electrode assembly, and a gap greater than 0 exists between the first tab and the second tab;
the first tabs and the second tabs of different electrode assemblies are sequentially arranged along the length direction of the electrode assemblies, and gaps greater than or equal to 0 exist between the different first tabs and/or gaps greater than or equal to 0 exist between the different second tabs;
a gap greater than 0 exists between the first tab and the second tab of different electrode assemblies.
Optionally, in the above electrochemical device, the electrochemical device further includes a PCB board:
the PCB is connected with the first electrode lug and the second electrode lug;
the PCB is arranged on the outer side of the second shell, the dimension of the PCB parallel to the depth direction of the second groove is not greater than the depth b of the second groove, and the dimension parallel to the leading-out direction of the first tab is not greater than the width of the second skirt.
An electronic device comprises the electrochemical device.
According to the technical scheme, the electrochemical device provided by the utility model has the advantages that the first shell, the second shell and the separator are sequentially attached through the first skirt edge, the third skirt edge and the second skirt edge to form the annular sealing edge. The first casing sets up first recess, and the second casing sets up the second recess, and the baffle sets up the third recess to the degree of depth b of second recess is greater than the degree of depth a of first recess, and the second recess degree of depth scope in the packaging shell outside can hold the electrode assembly encapsulation, pile up the installation of series-parallel in-process spare part. The size of the assembled parts is prevented from protruding out of the packaging shell, and the volume energy density of the electrochemical device is improved.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a side view of an electrochemical device provided in an embodiment of the present utility model;
FIG. 2 is a schematic cross-sectional view along A-A direction according to an embodiment of the present utility model;
fig. 3 is a top view of an electrochemical device (the thickness of the electrode assembly is the same) according to an embodiment of the present utility model;
fig. 4 is a top view of a second embodiment of an electrochemical device (with different thicknesses of the electrode assemblies).
Wherein:
1-packaging shell, 11-first casing, 12-second casing, 2-baffle, 3-electrode subassembly, 4-PCB board.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In describing the utility model, it should be noted that the terms "center", "upper", "lower", and "lower" are used to describe the utility model,
The directions or positions indicated by the terms "front", "back", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positions shown in the drawings, or are the directions or positions conventionally put in use of the inventive product, for convenience only in describing the utility model and simplifying the process
The description, rather than indicating or implying that the apparatus or elements herein referred to must have a particular orientation, be constructed and operated in a particular 5-bit configuration, is not intended to limit the present utility model. Furthermore, the terms "first," "second," etc.),
"second", "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
As shown in fig. 1 to 4, an embodiment of the present utility model provides an electrochemical device.
First, the electrochemical device includes a package case 1 and a separator 2, the package case 1 including a first case 11
And a second housing 12, the partition plate 2 being disposed between the first housing 11 and the second housing 12; the first housing 110 includes a first groove and a first skirt disposed around the first groove; the second housing 12 includes a second
The second skirt is arranged around the second groove; the partition board 2 comprises a third groove, and the second skirt edge, the partition board 2 and the first skirt edge are sequentially attached to form an annular sealing edge; i.e. the first housing 11 and the second housing 12 are assembled in a butt joint along the skirt circumference of the first housing 11 and the second housing 12. The depth a of the first groove is smaller than the depth b of the second groove.
5 it can be seen that the electrochemical device provided in the embodiment of the present utility model, the first case 11 and the second case 12
And the partition board 2 is jointed with the first skirt edge, the partition board 2 and the second skirt edge to form an annular sealing edge. The first shell 11 is provided with a first groove, the second shell 12 is provided with a second groove, the partition board 2 is provided with a third groove, the depth of the second groove is larger than that of the first groove, and the electrode can be accommodated in the second groove depth range outside the packaging shell 1
And the assembly 3 is used for packaging and mounting parts in the stacking serial-parallel connection process. The size of the assembled part is prevented from protruding out of the 0-package shell, and the volume energy density of the electrochemical device is improved.
In specific implementation, the partition board 2 further comprises a third skirt edge, and the third skirt edge is arranged around the third groove; the third skirt is positioned between the first skirt and the second skirt, so that two sides of the partition board 2 respectively form independent cavities with the first shell 11 and the second shell 12;
it should be noted that the depth c of the third groove is related to the depth a of the first groove, the depth 5 b of the second groove, and the size of the independent cavity formed at both sides of the partition board 2, and the depth c of the third groove is greater than 0.
No matter how large the depth c of the third groove is, it is necessary to ensure that the third skirt is disposed between the first skirt and the second skirt, so that the two sides of the partition board 2 form independent cavities with the first casing 11 and the second casing 12, respectively. The depth c of the third groove is not particularly limited, and may be designed according to actual needs by those skilled in the art.
0 the separator 2 may be provided singly or in plural. When a partition plate 2 is provided, the partition plate
The two sides of the plate 2 respectively form independent cavities with the first shell 11 and the second shell 12; when a plurality of partition boards 2 are arranged, independent cavities are formed between the adjacent partition boards 2, between the partition boards 2 adjacent to the first shell 11 and between the partition boards 2 adjacent to the second shell 12 and between the second shell 12, at this time, the depth c of the third groove of each partition board 2 can meet the requirement that each third skirt edge is arranged between the first skirt edge and the second skirt edge, independent spaces are formed respectively, and the depth c of each third groove is specifically designed according to specific situations.
The separator 2 is made of an ion-insulating material, and includes an intermediate layer and two encapsulation layers, and the layers are bonded to each other by an adhesive.
In specific implementation, the first skirt edge, the second skirt edge and the third skirt edge are connected through sealant. The third skirt board of the partition board 2 is connected with the first skirt board of the first shell 11 and the second skirt board of the second shell 12 through sealant, so that the sealing performance of the package shell 1 is guaranteed, in addition, the package shell can be sealed through a sealing mode such as hot pressing, the sealing connection mode is not particularly limited, and a person skilled in the art can design according to actual needs.
When the width of the third skirt edge is consistent with the width of the first skirt edge and the width of the second skirt edge, the first skirt edge, the third skirt edge and the second skirt edge are sequentially sealed to form a first annular sealing edge; when the width of the third skirt edge is smaller than that of the first skirt edge and that of the second skirt edge, the first skirt edge, the third skirt edge and the second skirt edge are sequentially sealed to form a first annular sealing edge in a circle close to the first groove, and the first skirt edge and the second skirt edge are sealed to form a second annular sealing edge in a circle away from the first groove.
In particular, the electrode assembly 3 is included and is positioned in the cavity. The number of the electrode assemblies 3 is matched with the number of the cavities, the size of the electrode assemblies 3 is matched with the size of the cavities, that is, the size of the electrode assemblies 3 is the same as or slightly smaller than the size of the cavities, so that the volume of the electrode assemblies 3 in a limited space is conveniently larger, and the volumetric energy density of the electrochemical device can be improved.
In specific implementation, the electrode assembly 3 is in a winding structure, and the depth c of the third groove is less than half of the thickness of the electrode assembly 3 and is not zero; the length of the third groove is smaller than the length of the electrode assembly 3. It should be noted that, the electrode assembly 3 of the winding structure includes a bending section, a straight section and a bending section in order along the length direction of the electrode assembly 3, and the width of the bending section is gradually smaller along the length direction of the electrode assembly 3 relative to the width of the straight section, that is, the section of the electrode assembly 3 is gradually smaller.
In specific implementation, the electrode assembly 3 is a lamination structure, and the depth of the third groove is smaller than the thickness of the electrode assembly 3 and is not zero; the length of the third groove is greater than the length of the electrode assembly 3.
In a preferred embodiment, the first case 11-first electrode assembly-separator 2-second electrode assembly-second case 12 is stacked, and the separator 2 is sealed from both the first case 11 and the second case 12 by sealing the third skirt of the separator 2 to the first skirt of the first case 11 and the second skirt of the second case 12, thereby completely isolating the first electrode assembly from the second electrode assembly.
First, both the first case 11 and the second case 12 are recessed to place the electrode assembly 3, wherein the first case 11 has a smaller pit depth than the second case 12 (i.e., the first recess has a smaller depth a than the second recess has a smaller depth b).
When the first electrode assembly and the second electrode assembly are in a lamination structure and have the thickness f, and the size of the electrode assembly 3 is the same as that of the cavity, the separator 2 needs to be punched with pits, the depth of the pits (namely, the depth c of the third groove) is c=f-a, the depth a of the first groove is in the range of 0-a < (a+b)/2, namely, the depth c of the third groove is in the range of 0<c < (a+b)/2, the length of the third groove is smaller than that of the first electrode assembly, the depth b of the second groove can be ensured to be as large as possible, and the outer side of the second shell 12 is provided with a space for accommodating a component, so that the energy density of the electrochemical device is improved.
When the first electrode assembly and the second electrode assembly are in a lamination structure, the thickness d of the first electrode assembly is smaller than the thickness e of the second electrode assembly, the size of the electrode assembly 3 is the same as that of the cavity, the depth c=d-a of the third groove, the depth a of the first groove is more than or equal to 0 and less than or equal to d, namely, the depth c of the third groove is more than or equal to 0 and less than or equal to d, the depth b of the second groove can be ensured to be as large as possible, and the outer side of the second shell 12 is provided with a space for accommodating components, so that the energy density of the electrochemical device is improved.
Referring to fig. 3 in detail, when the first electrode assembly and the second electrode assembly are of winding structure and have the thickness f, and the size of the electrode assembly 3 is the same as the size of the cavity, the depth c of the third groove is equal to f-a, the depth a of the first groove ranges from (a+b)/4<a < (a+b)/2, that is, the depth c of the third groove ranges from 0<c < (a+b)/4, the grooving point of the third groove is located at the bending section of the electrode assembly 3, the length of the third groove is smaller than that of the first electrode assembly, the depth a of the first groove is smaller than that of the second groove, the space for accommodating the components is provided outside the second casing 12, and the length of the third groove is smaller than that of the first electrode assembly, so that the length of the electrode assembly 3 is as much as possible, and the energy density of the electrochemical device is improved.
Referring to fig. 4 in detail, when the first electrode assembly and the second electrode assembly are in a winding structure, the thickness d of the first electrode assembly is smaller than the thickness e of the second electrode assembly, the size of the electrode assembly 3 is the same as the size of the cavity, the depth c=d-a of the third groove, the depth a of the first groove ranges from d/2<a < d, that is, the depth c of the third groove ranges from 0< c < d/2, the grooving point of the third groove is located at the bending section of the electrode assembly 3, the length of the third groove is smaller than the length of the first electrode assembly, the depth a of the first groove is smaller than the depth b of the second groove, a space for accommodating components is reserved outside the second casing 12, and the length of the third groove is smaller than the length of the first electrode assembly, so that the length of the electrode assembly 3 is as much as possible, and the energy density of the electrochemical device is improved.
In particular, the electrode assembly 3 comprises a first tab and a second tab with different polarities, both of which are led out from the annular sealing edge. When the electrode assembly 3 is in a winding structure, one tab or a plurality of tabs can be respectively led out from the positive and negative electrode plates in the winding structure; when the structure of the electrode assembly 3 is a lamination structure, a positive electrode tab and a negative electrode tab are respectively led out from each layer of positive electrode tab and negative electrode tab of the lamination structure, and finally the electrode assembly 3 of the lamination structure comprises a plurality of groups of positive electrode tabs and negative electrode tabs, and then tab leads are transferred through transfer welding. The polarities of the first tab and the second tab are different, and the positive tab and the negative tab are not particularly limited.
In specific implementation, the first electrode lug and the second electrode lug of the same electrode assembly 3 are sequentially arranged along the length direction of the electrode assembly 3, and a gap larger than 0 exists between the first electrode lug and the second electrode lug; the first tabs and the second tabs of different electrode assemblies 3 are sequentially arranged along the length direction of the electrode assemblies 3, and gaps larger than or equal to 0 exist between the different first tabs and/or gaps larger than or equal to 0 exist between the different second tabs; a gap greater than 0 exists between the first tab and the second tab of the different electrode assembly 3. That is, the plurality of tabs of the plurality of electrode assemblies 3 arranged in the packaging case 1 are sequentially arranged along the length direction of the electrode assemblies 3, gaps larger than or equal to 0 exist among the plurality of tabs with the same polarity, gaps larger than 0 exist among the plurality of tabs with different polarities, that is, the plurality of tabs are not overlapped completely along the thickness direction of the electrode assemblies 3, and each tab independently extends out from the annular sealing edge of the packaging case 1, so that the sealing of the annular sealing edge is facilitated.
When in specific implementation, the device further comprises a PCB 4 (printed circuit board ), wherein the PCB 4 is connected with the first lug and the second lug; the PCB 4 is arranged outside the second shell 12, the dimension of the PCB 4 parallel to the depth direction of the second groove is not greater than the depth b of the second groove, and the dimension parallel to the leading-out direction of the first tab is not greater than the width of the second skirt.
Because the stacking of the electrode assemblies 3 is performed in consideration of the problem of the rise in the charge-discharge temperature of the electrode assemblies 3, the thickness of the electrode assemblies 3 is generally small, and the advantage of the package case 1 is more apparent as the thickness of the electrode assemblies 3 is smaller. The electrochemical device can be assembled by using various structural members, such as the PCB 4, the second groove depth b of the outer side of the second housing 12 can be used for accommodating the PCB 4, and the dimension of the PCB 4 parallel to the second groove depth direction is not greater than the depth b of the second groove, and the dimension parallel to the first tab leading-out direction is not greater than the width of the second skirt. It can be ensured that the PCB 4 does not exceed the size of the package case, thereby contributing to an improvement in the volumetric energy density of the electrochemical device.
In particular, the electrode assembly 3 includes a positive electrode tab, a negative electrode tab, a tab, and a separator. The positive and negative electrode sheets in the electrode assembly 3 are separated by a separator, and the thickness of the electrode assembly 3 is between 1.5mm and 7mm, but is not limited thereto, and those skilled in the art can design the thickness of the electrode assembly 3 according to actual needs.
In specific implementation, the positive electrode plate comprises a positive electrode current collector and a positive electrode paste. The positive electrode current collector may be an aluminum foil, an aluminum alloy foil, a composite current collector, or the like, such as an aluminum foil having a thickness of 8 μm to 13 μm. The positive electrode paste comprises a positive electrode active material, a conductive agent and a binder, wherein the thickness of the paste is between 30 and 120um, and the positive electrode active material can be one or more of lithium cobaltate, lithium manganate, ternary materials, lithium iron phosphate or lithium manganese iron phosphate and the like. The conductive agent can be one or more of carbon black, carbon nano tube, graphene and the like. The binder may be one or more of styrene-butadiene rubber (SBR), polyvinyl alcohol (PVA), etc. However, the material and thickness of the positive electrode current collector, the structure and thickness of the positive electrode paste, the type of the positive electrode active material, the type of the conductive agent, the type of the adhesive, and the like are not limited thereto, and may be designed according to actual needs by those skilled in the art.
In specific implementation, the negative electrode plate comprises a negative electrode current collector and a negative electrode paste. The negative electrode current collector may be a copper foil, a copper alloy foil, a composite current collector, or the like, for example, the copper foil has a thickness of between 4 μm and 10 μm. The negative electrode paste comprises a negative electrode active material, a conductive agent and a binder, wherein the thickness of the paste is between 30um and 130um, and the negative electrode active material can be one or more of graphite, a silicon material, a silicon oxide, lithium titanate and the like. The conductive agent can be one or more of carbon black, carbon nano tube, graphene and the like, or no conductive agent is added. The binder may be one or more of polyvinyl alcohol (PVA), polytetrafluoroethylene (PTFE), sodium carboxymethyl cellulose (CMC-Na), or the like. However, the present utility model is not limited thereto, and the materials and thicknesses of the negative electrode current collector, the structure and thickness of the negative electrode paste, the type of the negative electrode active material, the type of the conductive agent, the type of the binder, and the like may be designed according to actual needs by those skilled in the art.
In particular embodiments, the separator may include a polymer or inorganic or composite material formed of a material that is relatively stable with respect to the electrolyte. The thickness of the separator is between 4 μm and 20 μm. But are not limited thereto, the specific materials and thickness of the separator may be designed according to actual needs by those skilled in the art.
In specific implementation, the tab refers to a metal conductor led out from the positive electrode plate or the negative electrode plate. The positive electrode tab is led out from the positive electrode plate, and the negative electrode tab is led out from the negative electrode plate. The general tab also contains tab glue, and the material of the tab glue comprises one or more of polypropylene (PP), polyethylene terephthalate (PET), polyethylene naphthalate (PEN) and the like. But not limited to, specific materials of the tab adhesive, and those skilled in the art can design according to actual needs.
In specific implementation, the electrolyte comprises lithium salt and a nonaqueous solvent, wherein the lithium salt is one or more of LiPF6, liBF4, liAsF6 and LiClO4, and the nonaqueous solvent is one or more of carbonate compound, carboxylic acid ester compound, ether compound, nitrile compound and other organic solvent. However, the composition of the electrolyte, the type of lithium salt, and the type of nonaqueous solvent are not limited thereto, and those skilled in the art can design the electrolyte according to actual needs.
In specific implementation, the packaging shell 1 is an aluminum plastic film, and the aluminum plastic film comprises an outer nylon layer, a middle aluminum layer and an inner PP layer, wherein the layers are bonded through an adhesive. But not limited to, the specific materials and structures of the package 1 may be designed according to actual needs by those skilled in the art.
The embodiment of the utility model provides an electronic device, which comprises the electrochemical device and has good energy density and a reliable packaging structure.
It can be seen that the embodiment of the present utility model provides an electronic device, wherein the first casing 11 and the second casing 12 of the packaging case 1 in the electrochemical device are bonded to form an annular sealing edge through the first skirt and the second skirt. The first shell 11 is provided with a first groove, the second shell 12 is provided with a second groove, the depth of the second groove is larger than that of the first groove 5, and the second groove depth range outside the packaging shell 1 can accommodate the packaging and stacking of the electrode assemblies 3
And (5) installing parts in the serial-parallel connection process. The electrochemical device has the advantages that various assembly components of the electrochemical device can be guaranteed to have enough arrangement space, the assembled components are prevented from protruding out of the packaging shell, the volume energy density of the electrochemical device is improved, and therefore the usability of the electronic device can be improved.
The electronic device of the present utility model is not particularly limited, and may include, but is not limited to: notebook computer, 0 pen input type computer, mobile computer, electronic book player, portable telephone, portable facsimile machine, and stool
Portable copiers, portable printers, headset, video recorders, liquid crystal televisions, portable cleaners, portable CD players, mini compact discs, transceivers, electronic notebooks, calculators, memory cards, portable audio recorders, radios, standby power supplies, motors, automobiles, motorcycles, mopeds, bicycles, lighting fixtures, toys, game consoles, clocks, electric tools, flashlights, cameras, household large-sized 5-battery and lithium-ion capacitors, and the like.
Finally, it is further noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a 0-series of elements does not include only those elements, but may include the absence of elements
Other elements specifically listed or inherent to such process, method, article, or apparatus are also included. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the difference between 5 and other embodiments, and the same similar parts between the embodiments are all enough to be referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied without departing from the spirit or scope of the utility model
In the following, in other embodiments. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. An electrochemical device characterized by comprising a package case (1) and a separator (2):
the packaging shell (1) comprises a first shell (11) and a second shell (12), and the partition board (2) is arranged between the first shell (11) and the second shell (12);
the first shell (11) comprises a first groove and a first skirt, and the first skirt is arranged around the first groove;
the second housing (12) comprises a second groove and a second skirt arranged around the second groove;
the partition board (2) comprises a third groove, and the second skirt edge, the partition board (2) and the first skirt edge are sequentially attached to form an annular sealing edge;
the depth a of the first groove is smaller than the depth b of the second groove.
2. The electrochemical device according to claim 1, wherein the separator (2) further comprises a third skirt disposed around the third recess;
the third skirt edge is positioned between the first skirt edge and the second skirt edge, so that two sides of the partition plate (2) respectively form independent cavities with the first shell (11) and the second shell (12);
the second skirt edge, the third skirt edge and the first skirt edge are sequentially attached to form an annular sealing edge.
3. The electrochemical device of claim 2, wherein the first skirt, the second skirt, and the third skirt are connected by a sealant.
4. The electrochemical device of claim 2, further comprising an electrode assembly (3) located within the cavity.
5. The electrochemical device according to claim 4, wherein the electrode assembly (3) is a wound structure,
the depth c of the third groove is less than half the thickness of the electrode assembly (3) and is not zero;
the length of the third groove is smaller than the length of the electrode assembly (3).
6. The electrochemical device according to claim 4, wherein the electrode assembly (3) is a lamination stack,
the third groove depth is less than the thickness of the electrode assembly (3) and is not zero;
the length of the third groove is greater than the length of the electrode assembly (3).
7. The electrochemical device according to claim 4, characterized in that the electrode assembly (3) comprises a first tab and a second tab of different polarity, both leading from the annular sealing edge.
8. The electrochemical device according to claim 7, wherein the first tab and the second tab of the same electrode assembly (3) are sequentially arranged along a length direction of the electrode assembly (3), and a gap greater than 0 exists between the first tab and the second tab;
the first lugs and the second lugs of different electrode assemblies (3) are sequentially arranged along the length direction of the electrode assemblies (3), and gaps larger than or equal to 0 exist between the different first lugs and/or gaps larger than or equal to 0 exist between the different second lugs;
a gap greater than 0 exists between the first tab and the second tab of different electrode assemblies (3).
9. The electrochemical device according to claim 7, further comprising a PCB board (4):
the PCB (4) is connected with the first electrode lug and the second electrode lug;
the PCB (4) is arranged outside the second shell (12), and the dimension of the PCB (4) parallel to the depth direction of the second groove is not greater than the depth b of the second groove.
10. An electronic device comprising the electrochemical device according to any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202223551425.0U CN219286613U (en) | 2022-12-29 | 2022-12-29 | Electrochemical device and electronic device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202223551425.0U CN219286613U (en) | 2022-12-29 | 2022-12-29 | Electrochemical device and electronic device |
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| CN219286613U true CN219286613U (en) | 2023-06-30 |
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| CN202223551425.0U Active CN219286613U (en) | 2022-12-29 | 2022-12-29 | Electrochemical device and electronic device |
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