CN116190935A - Electrochemical device and electronic apparatus - Google Patents

Electrochemical device and electronic apparatus Download PDF

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Publication number
CN116190935A
CN116190935A CN202310280056.6A CN202310280056A CN116190935A CN 116190935 A CN116190935 A CN 116190935A CN 202310280056 A CN202310280056 A CN 202310280056A CN 116190935 A CN116190935 A CN 116190935A
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Prior art keywords
pole
electrochemical device
tab
area
top sealing
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Pending
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CN202310280056.6A
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Chinese (zh)
Inventor
李铎
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Ningde Amperex Technology Ltd
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Ningde Amperex Technology Ltd
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Priority to CN202310280056.6A priority Critical patent/CN116190935A/en
Publication of CN116190935A publication Critical patent/CN116190935A/en
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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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/536—Electrode connections inside a battery casing characterised by the method of fixing the leads to the electrodes, e.g. by welding
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • 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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
    • 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
    • H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
    • 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
    • H01M50/543—Terminals
    • H01M50/545—Terminals formed by the casing of the 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/547—Terminals characterised by the disposition of the terminals on the cells
    • H01M50/55—Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
    • 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
    • H01M50/543—Terminals
    • H01M50/552—Terminals characterised by their shape
    • H01M50/553—Terminals adapted for prismatic, pouch 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/586—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries inside the batteries, e.g. incorrect connections of electrodes
    • 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
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
    • 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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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

The application provides an electrochemical device and an electronic apparatus. Wherein the electrochemical device comprises a housing, an electrode assembly and a pole, the housing comprising a first housing and a second housing opposite to each other; the shell comprises a containing part and a top sealing part, the first shell comprises a first area positioned at the top sealing part, and the second shell comprises a second area positioned at the top sealing part; the first area is provided with a through hole; the electrode assembly is accommodated in the accommodating part; the pole is arranged in the through hole; the electrode assembly comprises a tab, and the tab is electrically connected with the pole in the shell. The electrochemical device has higher energy density and safety performance.

Description

Electrochemical device and electronic apparatus
Technical Field
The present disclosure relates to the field of battery technology, and more particularly, to an electrochemical device and an electronic apparatus having the same.
Background
The lithium ion battery has the advantages of high energy density, long cycle life, high nominal voltage, low self-discharge rate, small volume, light weight and the like, and is widely applied in the field of consumer electronics. With the recent rapid development of electric vehicles and mobile electronic devices, the requirements of energy density, safety, fast charge and other performances of batteries are increasingly high, and the appearance of novel batteries with comprehensive improvement of comprehensive performances is expected.
Disclosure of Invention
The inventor of the application researches and discovers that in the packaging process of the existing electrochemical device, the electrode lug needs to be folded and welded in the shell to be led out, the bent part and the welded part of the electrode lug are piled up at the head part of the electrode assembly, the top space of the electrochemical device is occupied, and the energy density of the electrochemical device after packaging is reduced. In addition, the root of the tab leading-out piece positioned in the shell is easy to be inserted into a pole piece area of the electrode assembly in the impact process of falling and the like, so that short circuit is caused, and safety accidents are caused.
In view of the above, the present application provides an electrochemical device and an electronic apparatus having the same to improve the energy density and safety of the electrochemical device.
In a first aspect of the present application, there is provided an electrochemical device comprising a case, an electrode assembly, and a post, the case comprising opposing first and second cases; the shell comprises a containing part and a top sealing part, the first shell comprises a first area positioned at the top sealing part, and the second shell comprises a second area positioned at the top sealing part; the first area is provided with a through hole; the electrode assembly is accommodated in the accommodating part; the pole is arranged in the through hole; the electrode assembly comprises a tab, and the tab and the pole are electrically connected in the shell. So, the electrochemical device of this application is through setting up the utmost point post structure at the top seal portion, and electrode assembly's utmost point ear is connected with the utmost point post in the casing, has cancelled the structure that the utmost point ear draws forth, has reduced the space that electrode assembly head occupy, is favorable to improving electrochemical device's energy density. In addition, the pole is arranged at the top sealing part, and the two sides of the pole are clamped by the first area and the second area of the shell, so that the pole can be prevented from being inserted into the pole piece area of the electrode assembly in the impact process of falling and the like, and the safety performance of the electrochemical device is improved.
In some embodiments, the pole includes a connection portion between the first region and the second region, and a protrusion portion connected to the first region. Therefore, the connecting part of the pole is clamped by the first area and the second area of the shell, and the pole piece can be prevented from being inserted into the pole piece area of the electrode assembly in the impact process such as falling, so that the safety performance of the electrochemical device is improved.
In some embodiments, the housing includes an encapsulation layer located inside the housing. Therefore, the packaging layer on the inner side of the shell can conveniently carry out sealing connection on the connecting part of the pole and the first area of the shell, and insulation between the pole and the shell is realized.
In some embodiments, a seal is provided between the connection and the first region. In this way, the seal provided between the connection portion and the first region can facilitate a sealed connection between the connection portion of the pole and the first region of the housing.
In some embodiments, the electrochemical device further includes a first insulator disposed between the protrusion and an inner wall of the through hole. In this way, the first insulating member arranged between the protruding portion and the inner wall of the through hole can prevent the pole from making electrical contact with the housing at the through hole, and reduce the risk of short circuit.
In some embodiments, the encapsulation layer comprises a polymer.
In some embodiments, the housing further comprises a metal layer and a protective layer, the metal layer being located between the encapsulation layer and the protective layer. Thus, the mechanical strength and the safety performance of the shell are improved.
In some embodiments, the encapsulation layer comprises polypropylene, anhydride modified polypropylene, polyethylene, ethylene propylene copolymer, polyvinyl chloride, polystyrene, polyether nitrile, polyurethane, polyamide, polyester, amorphous alpha-olefin copolymer, or at least one of the derivatives thereof.
In some embodiments, the electrochemical device further comprises a second insulating member, the tab comprises a connection region connected to the post, and the second insulating member is located on a surface of the tab facing away from the post and covers the connection region. Therefore, the second insulating piece can isolate burrs at the joint of the electrode lug and the electrode post from the second area of the shell, and the risk of short circuit of the electrochemical device is reduced.
In some embodiments, the pole comprises a first pole and a second pole, the first pole and the second pole being disposed at the top seal at a distance; the electrode assembly comprises a first pole piece, a diaphragm and a second pole piece, the diaphragm is arranged between the first pole piece and the second pole piece, the tab comprises a first tab and a second tab, the first tab is connected with the first pole piece and the first pole column, and the second tab is connected with the second pole piece and the second pole column.
In some embodiments, the top seal is folded toward the receptacle, and the second region is located between the receptacle and the first region. Therefore, the bent top sealing part can further reduce the overall size of the electrochemical device, and is beneficial to further improving the energy density of the electrochemical device.
In some embodiments, a positioning member is disposed between the top sealing portion and the receiving portion, and the positioning member connects the top sealing portion and the receiving portion. Thus, the folded top sealing part can be fixed at the end part of the accommodating part, and the risk of poor connection between the electrochemical device and an external circuit caused by loose top sealing part position is reduced.
The second aspect of the present application also provides an electronic device, including the electrochemical device described in the above embodiment.
Drawings
For a clearer description of the technical solutions of the embodiments of the present application, reference will be made to the accompanying drawings in the embodiments briefly below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that other related drawings may also be obtained according to these drawings for a person of ordinary skill in the art.
Fig. 1 is a schematic side view of an electrochemical device according to an embodiment of the present application.
Fig. 2 is a schematic view showing a structure of a case of an electrochemical device in an open state in an embodiment of the present application.
Fig. 3 is a schematic structural view of the casing shown in fig. 2, in which a through hole is formed in the top sealing portion.
Fig. 4 is a schematic view of the structure of the housing shown in fig. 3 in which a post is disposed at the through hole.
Fig. 5 is a schematic view showing a structure in which an electrode assembly is placed in the case shown in fig. 4 and tabs of the electrode assembly are connected to a post.
Fig. 6 is a side view of the structure shown in fig. 5.
Fig. 7 is a schematic view of the electrochemical device shown in fig. 6 after the case is folded and packaged.
Fig. 8 is a schematic view of the electrochemical device shown in fig. 7 after the top seal is bent.
Fig. 9 is a schematic view of a structure of a housing in an embodiment.
Fig. 10 is a front, cross-sectional and top view of a pole in one embodiment.
Fig. 11 is a front, cross-sectional and top view of a pole in one embodiment.
Fig. 12 is a simplified schematic diagram of an electronic device in an embodiment.
Description of main reference numerals:
Figure BDA0004138042310000031
Figure BDA0004138042310000041
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the following detailed description will further illustrate the application in conjunction with the above-described figures.
Detailed Description
The following description of the technical solutions in the embodiments of the present application will be made clearly and completely with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "or/and" as used herein includes any and all combinations of one or more of the associated listed items.
Some embodiments of the present application are described in detail. The following embodiments and features of the embodiments may be combined with each other without collision.
Referring to fig. 1 to 8, an embodiment of the present application provides an electrochemical device 100 including a case 1, an electrode assembly 2, and a post 3. The housing 1 comprises opposing first and second housings 11, 12. The housing 1 includes a receiving portion 13 and a top seal portion 14. The first housing 11 has a first receiving chamber 111, and the second housing 12 has a second receiving chamber 121. The first accommodation chamber 111 is opposite to and communicates with the second accommodation chamber 121, and together forms the accommodation portion 13 of the housing 1. The electrode assembly 2 is accommodated in the accommodating portion 13. The first housing 11 includes a first region 141 located at the top seal 14, and the second housing 12 includes a second region 142 located at the top seal 14. The first region 141 is provided with a through hole 143, the pole 3 is disposed in the through hole 143, the electrode assembly 2 includes a tab 21, and the tab 21 and the pole 3 are electrically connected in the housing 1.
In this way, by providing the pole 3 at the top sealing portion 14, the tab 21 of the electrode assembly 2 is connected with the pole 3 in the case 1, the structure of leading out the tab leading-out member is eliminated, the space occupied by the head of the electrode assembly 2 is reduced, and the energy density of the electrochemical device 100 is advantageously improved. In addition, the electrode post 3 is disposed at the top sealing part 14, and both sides thereof are clamped by the first and second regions 141 and 142, so that it is possible to prevent it from being inserted into the pole piece region of the electrode assembly 2 during an impact such as a drop, which is advantageous in improving the safety performance of the electrochemical device 100.
Referring to fig. 1 and 6, the pole 3 includes a connection portion 31 and a protruding portion 32, the connection portion 31 is located between the first region 141 and the second region 142, and the connection portion 31 is connected to the first region 141. In this way, the connection portion 31 of the electrode post 3 is clamped by the first region 141 and the second region 142, and can be prevented from being inserted into the pole piece region of the electrode assembly 2 during an impact such as a drop, which is advantageous for improving the safety performance of the electrochemical device 100. In the embodiment of the present application, the connection portion 31 and the protruding portion 32 may be an integrally formed structure. The protruding portion 32 and the connecting portion 31 may be substantially coaxially disposed, so that the connection width between the periphery of the connecting portion 31 and the first region 141 may be maintained uniform, and the reliability of sealing may be improved.
In some embodiments of the present application, the housing 1 comprises an encapsulation layer 15 located inside the housing 1. The encapsulation layer 15 inside the housing 1 can conveniently seal the connection 31 of the pole 3 to the first region 141 of the housing 1 and provide insulation between the pole 3 and the housing 1. Further, the encapsulation layer 15 may include a polymer to facilitate a fusion connection between the connection portion 31 of the pole 3 and the first region 141.
In some embodiments of the present application, with continued reference to fig. 9, the housing 1 further includes a metal layer 16 and a protective layer 17, wherein the metal layer 16 is located between the encapsulation layer 15 and the protective layer 17. In this way, the mechanical strength and the safety performance of the housing 1 are advantageously improved. Further, the encapsulation layer 15 may further include at least one of polypropylene, anhydride modified polypropylene, polyethylene, ethylene propylene copolymer, polyvinyl chloride, polystyrene, polyether nitrile, polyurethane, polyamide, polyester, amorphous alpha-olefin copolymer, or derivatives thereof. In some embodiments of the present application, the protective layer 17 comprises a polymer. Further, the protective layer 17 comprises polyamide, polyethylene, polypropylene, ethylene propylene copolymer, polyvinyl chloride, polyester or at least one of the derivatives thereof. In some embodiments, the housing 1 is an aluminum plastic film.
Referring to fig. 3, the electrochemical device 100 further includes a first insulating member 4, where the first insulating member 4 is disposed between the protruding portion 32 and the inner wall of the through hole 143, so as to prevent the protruding portion 32 of the pole 3 from making electrical contact with the case 1 at the through hole 143, thereby reducing the risk of short circuit.
Referring to fig. 4 and 10, a sealing member 33 is disposed between the connecting portion 31 and the first region 141. The sealing member 33 includes, but is not limited to, a hot melt adhesive for promoting a sealing connection between the connection portion 31 and the first region 141, preventing external gas from entering the inside of the case 1 at the through hole 143 or an internal electrolyte from flowing out of the case 1, affecting the safety of the electrochemical device 100.
As shown in fig. 10 and 11, the connection portion 31 of the pole 3 has a substantially flat plate structure, the protrusion 32 of the pole 3 has a substantially columnar structure or a sheet structure, and the shape of the protrusion 32 can be customized according to the actual design requirement, which is not limited thereto. The sealing member 33 may be sleeved on the protruding portion 32, and is disposed on a side of the connecting portion 31 facing the protruding portion 32. When the protruding portion 32 of the pole 3 is inserted into the through hole 143 of the first region 141, the connection portion 31 may abut against the inner surface of the first region 141, and the seal 33 is interposed between the first region 141 and the connection portion 31.
The electrochemical device 100 of the present application may include both the first insulating member 4 and the sealing member 33, or may include one of the first insulating member 4 and the sealing member 33, as long as the design requirement is satisfied.
Referring again to fig. 6, in some embodiments, the electrochemical device 100 further includes a second insulating member 5, the tab 21 includes a connection region 213 connected to the pole 3, and the second insulating member 5 is located on a surface of the tab 21 facing away from the pole 3 and covers the connection region 213. In this way, the second insulating member 5 can isolate burrs at the connection of the tab 21 and the post 3 from the second region 142, reducing the risk of short-circuiting the electrochemical device 100. In the embodiment of the present application, the second insulating member 5 includes, but is not limited to, a structure such as insulating adhesive paper, and may cover the region of the tab 21 at the top of the electrode assembly 2 and connect the pole piece assembly body in the electrode assembly 2, in addition to the connection region 213 where the tab 21 is connected to the pole post 3, so that on one hand, shaking of the tab 21 may be suppressed, and on the other hand, insulation between the tab 21 and the case 1 may be improved, and risk of short circuit may be reduced.
As shown in fig. 3 to 5, in some embodiments of the present application, the pole 3 includes a first pole 34 and a second pole 35, and the first pole 34 and the second pole 35 are disposed at the top seal 14 at a distance from each other. Specifically, the first region 141 of the top sealing portion 14 is provided with two through holes 143 in parallel for mounting the first pole 34 and the second pole 35, respectively. The electrode assembly 2 comprises a first pole piece, a diaphragm and a second pole piece, the diaphragm is arranged between the first pole piece and the second pole piece, and the tab 21 comprises a first tab 211 and a second tab 212. When the electrode assembly 2 is placed in the accommodating portion 13 of the case 1, the first tab 211 connects the first pole piece and the first pole post 34, and the second tab 212 connects the second pole piece and the second pole post 35. The connection manner of the first tab 211 and the first pole 34, and the connection manner of the second tab 212 and the second pole 35 include, but are not limited to, welding. In some embodiments of the present application, the number of the first tabs 211 is plural, and/or the number of the second tabs 212 is plural, so that the requirements of fast charge and high power discharge can be satisfied, and the high-rate charge and discharge performance of the electrochemical device is improved.
Referring to fig. 7 and 8, in some embodiments, the top sealing portion 14 is bent toward the accommodating portion 13, and the second area 142 is located between the accommodating portion 13 and the first area 141. In this way, the folded top sealing part 14 may further reduce the overall size of the electrochemical device 100, thereby further improving the energy density of the electrochemical device 100. In addition, after the top sealing portion 14 is bent, the direction of the protruding portion 32 of the pole 3 can be changed, so that the electrochemical device 100 can be conveniently connected to an external circuit.
Further, a positioning member 6 is disposed between the top sealing portion 14 and the accommodating portion 13, and the positioning member 6 connects the top sealing portion 14 and the accommodating portion 13. In this way, the folded top seal portion 14 can be fixed to the end of the housing portion 13, and the risk of poor connection between the electrochemical device 100 and the external circuit due to loosening of the top seal portion 14 can be reduced. In the embodiment of the present application, the positioning member 6 includes, but is not limited to, a member having an adhesive function such as a double-sided tape, a hot melt adhesive, or the like.
Referring to fig. 2 to 8 again, the present application also provides a manufacturing method of the electrochemical device 100, which is used for manufacturing the electrochemical device 100 according to the above embodiment.
As shown in fig. 2, when the electrochemical device 100 is manufactured, the case 1 is first prepared, and the first case 11 and the second case 12 are arranged side by side and integrally molded. The first housing 11 and the second housing 12 are formed with a first housing chamber 111 and a second housing chamber 121, respectively, by a pressing process.
As shown in fig. 3, the opposite side regions of the first housing 11 and the second housing 12 are a first region 141 and a second region 142, respectively, and a through hole 143 for mounting the pole 3 is formed in the first region 141. In the embodiment of the present application, the number of through holes 143 is two for mounting the first pole 34 and the second pole 35, respectively.
The inner wall of the through hole 143 may also be provided with a first insulator 4 for isolating the housing 1 from the protruding portion 32 of the pole 3.
As shown in fig. 4, the manufacturing method further includes: the first and second poles 34 and 35 are respectively mounted into the two through holes 143, and a sealing member 33 is provided between the connection portion 31 of the pole 3 and the first region 141 to isolate the connection portion 31 of the pole 3 from the first region 141, and simultaneously fix the connection portion 31 to the first region 141 and seal the connection portion 31 to the first region 141.
As shown in fig. 5, the manufacturing method further includes: the electrode assembly 2 is placed in the first receiving chamber 111, and the first tab 211 and the second tab 212 of the electrode assembly 2 are electrically connected with the connection parts 31 of the first and second posts 34 and 35, respectively, by means including, but not limited to, welding.
As shown in fig. 6, the manufacturing method further includes: a second insulator 5 is provided, and the second insulator 5 covers a region where the tab 21 is connected to the connection portion 31. Further, the second insulating member 5 may also cover other regions of the tab 21 at the top of the electrode assembly 2 for fixing the position of the tab 21 and improving the insulating property at the position of the tab 21. Subsequently, the second housing 12 is folded toward the first housing 11, so that the first housing cavity 111 and the second housing cavity 121 are combined into the housing portion 13 of the housing 1, the first region 141 and the second region 142 are overlapped and sealed to form the top sealing portion 14 of the housing 1, and the connection portion 31 of the pole 3 is fixed between the first region 141 and the second region 142.
As shown in fig. 7, the manufacturing method further includes: the top sealing portion 14 of the housing 1 is bent toward the accommodating portion 13, and the second area 142 is located between the accommodating portion 13 and the first area 141. As shown in fig. 8, a positioning member 6 is further disposed between the top sealing portion 14 and the accommodating portion 13, and the positioning member 6 connects the top sealing portion 14 and the accommodating portion 13 to fix a relative position between the top sealing portion 14 and the accommodating portion 13.
Referring to fig. 12, the present application further provides an electronic device 200 including the electrochemical apparatus 100 according to the above embodiment. The electronic device 200 includes, but is not limited to, mobile terminal devices such as mobile phones, tablet computers, remote controllers, and the like.
By installing the electrochemical device 100 described in the above embodiment in the electronic apparatus 200, the structure of the post 3 of the top seal 14 of the electrochemical device 100 is advantageous in reducing the space occupied by the head structure of the electrochemical device 100, improving the energy density, so that the installation space reserved for the electrochemical device 100 in the electronic apparatus can be reduced, and the miniaturization of the electronic apparatus is facilitated. In addition, the mounting position of the pole 3 is fixed, so that the pole 3 can be prevented from being inserted into the pole piece region of the electrode assembly 2, and when the electronic device 200 provided with the electrochemical device 100 falls, the risk of internal short-circuit failure of the electrochemical device 100 can be reduced, and the use safety performance of the electronic device 200 can be improved.
The above embodiments are only for illustrating the technical solution of the present application and not for limiting, and although the present application has been described in detail with reference to the above preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present application may be modified or substituted without departing from the spirit and scope of the technical solution of the present application.

Claims (10)

1. An electrochemical device, comprising:
a housing including opposing first and second housings; the shell comprises a containing part and a top sealing part, the first shell comprises a first area positioned at the top sealing part, and the second shell comprises a second area positioned at the top sealing part; the first area is provided with a through hole;
an electrode assembly accommodated in the accommodation portion;
the pole is arranged in the through hole;
the electrode assembly comprises a tab, and the tab and the pole are electrically connected in the shell.
2. The electrochemical device according to claim 1, wherein:
the pole comprises a connecting part and a protruding part, wherein the connecting part is positioned between the first area and the second area, and the connecting part is connected with the first area.
3. The electrochemical device according to claim 1 or 2, characterized in that:
the housing includes an encapsulation layer inside the housing.
4. The electrochemical device according to claim 2, wherein: at least one of the following conditions is satisfied:
(1) A sealing element is arranged between the connecting part and the first area;
(2) The electrochemical device further includes a first insulating member disposed between the protruding portion and an inner wall of the through hole.
5. The electrochemical device according to claim 3, wherein: at least one of the following conditions is satisfied:
(1) The encapsulation layer comprises a polymer;
(2) The shell further comprises a metal layer and a protective layer, wherein the metal layer is positioned between the packaging layer and the protective layer;
(3) The encapsulation layer comprises polypropylene, anhydride modified polypropylene, polyethylene, ethylene propylene copolymer, polyvinyl chloride, polystyrene, polyether nitrile, polyurethane, polyamide, polyester, amorphous alpha-olefin copolymer, or at least one of the derivatives thereof.
6. The electrochemical device according to claim 1, wherein:
the electrochemical device further comprises a second insulating part, the tab comprises a connection region connected with the pole, and the second insulating part is positioned on the surface of the tab, which is away from the pole, and covers the connection region.
7. The electrochemical device according to claim 1, wherein:
the pole comprises a first pole and a second pole, and the first pole and the second pole are arranged at the top sealing part at intervals;
the electrode assembly comprises a first pole piece, a diaphragm and a second pole piece, the diaphragm is arranged between the first pole piece and the second pole piece, the tab comprises a first tab and a second tab, the first tab is connected with the first pole piece and the first pole column, and the second tab is connected with the second pole piece and the second pole column.
8. The electrochemical device according to claim 1, wherein:
the top sealing part is bent towards the accommodating part, and the second area is positioned between the accommodating part and the first area.
9. The electrochemical device according to claim 8, wherein:
a positioning piece is arranged between the top sealing part and the containing part, and the positioning piece is connected with the top sealing part and the containing part.
10. An electronic device comprising the electrochemical apparatus according to any one of claims 1 to 9.
CN202310280056.6A 2023-03-21 2023-03-21 Electrochemical device and electronic apparatus Pending CN116190935A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310280056.6A CN116190935A (en) 2023-03-21 2023-03-21 Electrochemical device and electronic apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310280056.6A CN116190935A (en) 2023-03-21 2023-03-21 Electrochemical device and electronic apparatus

Publications (1)

Publication Number Publication Date
CN116190935A true CN116190935A (en) 2023-05-30

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310280056.6A Pending CN116190935A (en) 2023-03-21 2023-03-21 Electrochemical device and electronic apparatus

Country Status (1)

Country Link
CN (1) CN116190935A (en)

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