CN113597701B - Electrochemical device and electronic device - Google Patents
Electrochemical device and electronic device Download PDFInfo
- Publication number
- CN113597701B CN113597701B CN202080007924.8A CN202080007924A CN113597701B CN 113597701 B CN113597701 B CN 113597701B CN 202080007924 A CN202080007924 A CN 202080007924A CN 113597701 B CN113597701 B CN 113597701B
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- sealing region
- recess
- tab
- electrochemical device
- electrode assembly
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- 238000007789 sealing Methods 0.000 claims abstract description 92
- 238000004806 packaging method and process Methods 0.000 claims abstract description 19
- 239000012212 insulator Substances 0.000 claims description 15
- 230000000994 depressogenic effect Effects 0.000 claims description 11
- 238000005538 encapsulation Methods 0.000 claims description 6
- 230000004308 accommodation Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 238000009461 vacuum packaging Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000004080 punching Methods 0.000 description 4
- 229910052744 lithium Inorganic materials 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 239000004831 Hot glue Substances 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 238000006056 electrooxidation reaction Methods 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 238000010295 mobile communication Methods 0.000 description 2
- 239000002985 plastic film Substances 0.000 description 2
- 229920006255 plastic film Polymers 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Classifications
-
- 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
-
- 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)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
An electrochemical device includes an electrode assembly, a packaging pouch, a first tab, and a second tab. The packaging bag comprises a first shell and a second shell, and the first shell and the second shell are combined with each other to form a containing space for containing the electrode assembly; the first lug is electrically connected with the electrode assembly and protrudes from the first end of the packaging bag; the second lug plate is electrically connected with the electrode assembly; the first shell comprises a first sealing area and a first non-sealing area, the first sealing area is located at the first end, and the first non-sealing area is connected with the first sealing area. The first non-sealing area is close to the first sealing area and is provided with a first concave part facing the accommodating space, and the first concave part is positioned on one side of the first wiring lug. The present application also provides an electronic device including the electrochemical device. The application provides an electrochemical device can avoid first lug to lead to first lug to be crooked because of the pressure differential that vacuum packaging produced, improves electrochemical device's production efficiency and security performance.
Description
Technical Field
The present disclosure relates to the field of energy storage technologies, and more particularly, to an electrochemical device and an electronic device having the same.
Background
Electrochemical devices, such as pouch cells, have wide applications in electronic devices such as consumer electronics, power tools, and the like. For electronic devices with higher power requirements, an electrochemical device design with multilayer connection plates is usually adopted to reduce internal resistance and meet the requirements of large-current charge and discharge.
The electrochemical device is usually packaged by a packaging bag (such as an aluminum plastic film or a steel plastic film), and an internal connection pad is disposed in the electrochemical device, and the internal connection pad is electrically connected to the external connection pad by a transfer welding. The external connection piece extends out of the sealing edge of the packaging belt and is used as a connecting part between the electrochemical device and external charging and discharging equipment. However, the inner tabs are bent inside the pouch and take up a part of the space after the transfer welding, resulting in a certain distance between the pouch and the electrode assembly. In the packaging and air exhausting process, the inside of the electrochemical device is in a negative pressure state, and the part around the lug is large in space, so that the packaging bag can collapse under the action of external atmospheric pressure, and the lug is pulled to cause the deflection of the lug. The product with the crooked lug belongs to a defective product and can influence the production efficiency of the electrochemical device; secondly, under extreme use conditions, the terminal skew can also lead to the contact of the different polarity's terminal, leads to electrochemical device short circuit, has the safety risk.
Disclosure of Invention
In order to solve the above disadvantages of the prior art, it is necessary to provide an electrochemical device capable of solving the problem of skew of the tab.
An electrochemical device includes an electrode assembly, a packaging pouch, a first tab, and a second tab. The packaging bag comprises a first shell and a second shell, and the first shell and the second shell are combined with each other to form a containing space for containing the electrode assembly; the first lug plate is electrically connected with the electrode component and protrudes from the first end of the packaging bag; the second lug plate is electrically connected with the electrode assembly; the first shell comprises a first sealing area and a first non-sealing area, the first sealing area is located at the first end, and the first non-sealing area is connected with the first sealing area. The first non-sealing area is close to the first sealing area and is provided with a first concave part facing the accommodating space, and the first concave part is positioned on one side of the first wiring lug.
The application provides an electrochemical device, through set up first depressed part on one side of first lug on first casing to reduce the distance between encapsulation bag and the electrode subassembly. Thereby when first casing of encapsulation and second casing, at the in-process of bleeding, weaken the inside negative pressure effect of encapsulation bag, and first depressed part also can produce the holding power of side direction to first lug to avoid first lug to lead to crooked because of the pressure differential, improve electrochemical device's production efficiency and fail safe nature.
In some embodiments of the present application, the second housing includes a second sealing region and a second non-sealing region, the second sealing region is located at the first end, the second non-sealing region is connected with the second sealing region, the first sealing region is joined with the second sealing region, the second non-sealing region is provided with a second recess facing the accommodating space near the second sealing region, and the second recess is located at one side of the first terminal piece. The second depressed part is further arranged on one side of the first wiring piece on the second shell, so that the first wiring piece can be further prevented from being inclined, and the production efficiency and the safety and the reliability of the electrochemical device are further improved.
In some embodiments of the present application, the first recess and the second recess are oppositely disposed, and the first sealing region extends to at least a partial region of the first recess. When the encapsulation, extend the seal district to first depressed part, the area in first seal district increases on the one hand, and its encapsulation intensity can improve, and on the other hand extends to the seal district of first depressed part and can provide stronger side direction holding power to first lug, further avoids first lug crooked, improves electrochemical device's production efficiency and fail safe nature.
In some embodiments of the present application, an insulator is provided at a position of the electrode assembly corresponding to the first recess. Therefore, the first sunken part can be prevented from being directly contacted with the electrode assembly to cause electrochemical corrosion, and the safety and reliability of the electrochemical device are improved.
In some embodiments of the present application, a width of the insulator is greater than or equal to a width of the first recess.
In some embodiments of the present application, the cross-sectional shape of the first recess is one of triangular, rectangular, square, trapezoidal, or arc-shaped. The shape and size design of the first depressed part are flexible, and the shape and size of the first depressed part can be optimized according to the effect of improving the deflection of the first wiring piece and the second wiring piece, so that the deflection problem of the first wiring piece and the second wiring piece is solved.
In some embodiments of the present application, the second tab protrudes from the first end of the pouch, the first recess is located between the first tab and the second tab, and a width of the first recess is less than or equal to a distance between the first tab and the second tab. The width of the first sunken part is controlled not to exceed the distance between the first lug plate and the second lug plate, so that the first sunken part does not influence the packaging effect of the first lug plate and the second lug plate and does not influence the packaging strength of the first lug plate and the second lug plate.
In some embodiments of the present application, the first non-sealing region is provided with a third recess portion facing the accommodating space adjacent to the first sealing region, and the first recess portion and the third recess portion are located at both sides of the first tab. Through all setting up the depressed part in first lug both sides, can further avoid first lug crooked, improve electrochemical device's production efficiency and fail safe nature.
In some embodiments of the present application, the second tab protrudes from the second end of the packaging bag, and the first housing further includes a third sealing region located at the second end, the third sealing region is connected to the first non-sealing region, the first non-sealing region is provided with a fourth recess portion near the third sealing region, and the fourth recess portion is located on one side of the second tab. The present application also provides an electronic device comprising the electrochemical device as above.
Drawings
Fig. 1 is a schematic structural view of an electrochemical device according to an embodiment of the present disclosure.
Fig. 2 is a schematic structural view of the pouch shown in fig. 1 according to an embodiment.
Fig. 3 is a schematic plan view of the package shown in fig. 2.
Fig. 4 is a schematic structural diagram of an electrochemical device in which a first sealing region extends to a portion of a first recess according to an embodiment of the present disclosure.
Fig. 5 is a structural diagram of an electrochemical device in which the first sealing region extends to all of the first recesses according to an embodiment of the present disclosure.
Fig. 6 is a schematic structural view of an electrochemical device having an insulator according to an embodiment of the present disclosure.
Fig. 7 is a schematic structural view of an electrochemical device having an insulator according to another embodiment of the present disclosure.
Fig. 8 is a schematic plan view of an embodiment of a pouch.
Fig. 9 is a schematic plan view of a pouch according to yet another embodiment.
Fig. 10 is a schematic plan view of a pouch according to still another embodiment.
Fig. 11 is a schematic structural diagram of an electrochemical device having a third recess according to an embodiment of the present disclosure.
Fig. 12 is a schematic structural view of an electrochemical device in which a first tab and a second tab are located on opposite sides according to an embodiment of the present disclosure.
Fig. 13 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
Description of the main elements
The following detailed description will further illustrate the present application in conjunction with the above-described figures.
Detailed Description
In order that the above objects, features and advantages of the present application can be more clearly understood, a detailed description of the present application will be given below with reference to the accompanying drawings and detailed description. In addition, the embodiments and features of the embodiments of the present application may be combined with each other without conflict. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, and the described embodiments are merely some, but not all embodiments of the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application are within the scope of protection of the present application.
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 present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes all and any combination of one or more of the associated listed items.
Referring to fig. 1, 2 and 3, an electrochemical device 100 is provided, wherein the electrochemical device 100 includes an electrode assembly 10, a pouch 20, a first tab 30 and a second tab 40. The pouch 20 includes a first case 21 and a second case 22, and the first case 21 and the second case 22 are combined with each other to form an accommodating space 25 in which the electrode assembly 10 is accommodated. The first tab 30 is electrically connected to the electrode assembly 10 and protrudes from the first end 23 of the pouch 20, and the second tab 40 is electrically connected to the electrode assembly 10. The first housing 21 includes a first sealing region 211 and a first non-sealing region 212, the first sealing region 211 being located at the first end 23, the first non-sealing region 212 being connected to the first sealing region 211.
The first non-sealing region 212 is provided adjacent to the first sealing region 211 with a first recess 213 facing the accommodating space 25, the first recess 213 being located at a side of the first tab 30.
The first recess 213 can be synchronously formed when the first housing 21 is subjected to pit punching, that is, a pit punching mold of the first housing 21 is modified, and no additional burden is imposed on the whole process.
It should be understood that the first recess 213 may be located at a side of the first tab 30 close to the second tab 40, and may also be located at a side of the first tab 30 far from the second tab 40.
The present application provides an electrochemical device 100 in which the distance between the pouch 20 and the electrode assembly 10 is reduced by providing a first recess 213 on the first case 21 on the side of the first tab 30. Therefore, when the first housing 21 and the second housing 22 are packaged, the negative pressure effect inside the packaging bag 20 is weakened during the air exhaust process, and the first concave portion 213 can also generate a lateral supporting force for the first wire connecting piece 30, so that the first wire connecting piece 30 is prevented from being inclined due to pressure difference, and the production efficiency and the safety reliability of the electrochemical device 100 are improved.
In an embodiment of the present application, the second tab 40 is located on the same side of the electrode assembly 10 as the first tab 30. The first and second tabs 30 and 40 are protruded from the first end 23, and the first recess 213 is located between the first and second tabs 30 and 40.
It is understood that the first recess 213 can also prevent the second tab 40 from being skewed due to a pressure difference during the evacuation process.
The electrochemical device 100 of the present application includes all devices capable of electrochemical reaction. Specifically, the electrochemical device 100 includes all kinds of primary batteries, secondary batteries, fuel cells, solar cells, and capacitors (e.g., super capacitors). Alternatively, the electrochemical device 100 may be a lithium secondary battery including a lithium metal secondary battery, a lithium ion secondary battery, a lithium polymer secondary battery, and a lithium ion polymer secondary battery.
The first sealing region 211 may be formed by pressing the first case 21 and the second case 22 through a sealing head, and thermally fusing polymer layers (e.g., polypropylene layers or polyethylene layers) in a portion of the first case 21 and a portion of the second case 22 at the pressed position, thereby forming the receiving space 25 for receiving the electrode assembly 10. Alternatively, the sealing manner of the first casing 21 and the second casing 22 is not limited to this, and may be thermal fusion of other materials, or fusion in other manners.
The first recess 213 may be sized according to actual needs to reduce the distance between the pouch 20 and the electrode assembly 10.
Further, referring to fig. 2 and fig. 3 again, the second housing 22 includes a second sealing region 221 and a second non-sealing region 222, the second sealing region 221 is located at the first end 23, the second non-sealing region 222 is connected to the second sealing region 221, the first sealing region 211 is connected to the second sealing region 221, the second non-sealing region 222 is disposed near the second sealing region 221 and faces a second recess 223 of the accommodating space 25, the second recess 223 is located at one side of the first tab 30, and the first recess 213 is disposed opposite to the second recess 223. By further providing the second recess 223, the first tab 30 can be further prevented from being inclined, and the safety and reliability of the electrochemical device 100 can be improved.
It should be understood that the first and second recesses 213 and 223 may not be disposed opposite to each other, i.e., they are disposed in a staggered manner, and may be selected according to the process requirements.
Further, the first sealing region 211 extends to at least a partial region of the first recess 213, that is, a part of the first sealing region 211 is located in the first recess 213, so that the area of the first sealing region 211 can be increased, and the package strength can be further enhanced. On the other hand, the sealing region extending to the first recess 213 may provide a stronger lateral supporting force to the first terminal plate 30, further preventing the first terminal plate 30 from being inclined, and improving the production efficiency and safety of the electrochemical device 100.
Referring to fig. 4, the first seal region 211 located in the first region I extends to a partial region of the first recess 213, and the first seal region 211 and the first recess 213 are spaced apart from each other, that is, the first recess 213 is partially filled by the first seal region 211. Wherein the first region I is located between the first and second tabs 30 and 40.
It should be understood that the first recess 213 may also be entirely filled with the first seal region 211. Thus, the first housing 21 may not be modified by the pit punching mold, and only the sealing head is modified correspondingly to be configured in a shape that the first sealing region 211 fills the first recess 213.
Referring to fig. 5, the first seal region 211 located in the second region II and the third region III extends to the entire region of the first recess 213, and the first seal region 211 is connected to the first recess 213, i.e., the first recess 213 is completely filled with the first seal region 211. The second region II is located on a side of the first wire connecting piece 30 away from the second wire connecting piece 40, and the third region III is located between the first wire connecting piece 30 and the second wire connecting piece 40.
Referring to fig. 6 and 7, an insulator 50 is disposed at a position of the electrode assembly 10 corresponding to the recess. In one embodiment, referring to fig. 6, an insulator 50 is disposed at a position of the electrode assembly 10 corresponding to the first recess 213, and the insulator 50 is disposed between the electrode assembly 10 and the first recess 213. The insulator 50 serves to prevent the pouch 20 from being in direct contact with the electrode assembly 10, thereby preventing electrochemical corrosion and improving the safety and reliability of the electrochemical device 100.
In one embodiment, the insulator 50 may be a single-sided adhesive, a double-sided adhesive, or a hot melt adhesive. When the insulator 50 is a double-sided tape or a hot melt adhesive, the insulator 50 may also fixedly connect the electrode assembly 10 and the pouch 20, so as to prevent the electrode assembly 10 from moving in the pouch 20, thereby improving the service life and safety and reliability of the electrochemical device 100.
Wherein the width W of the insulator 50 1 Is greater than or equal to the width W of the first recess 213 2 Wherein a direction perpendicular to the extending direction of the first tab 30 and parallel to the surface of the first housing 21 is defined as a width direction. Wherein the width W of the first recess 213 2 Calculated as the maximum distance of the first recess 213 in the width direction.
The first recess 213 has a first side 2132 and a second side 2134 along a cross section parallel to the surface of the first case 21, the first side 2132 extending outward adjacent to the first tab 30, and the second side 2134 being recessed toward the electrode assembly 10 adjacent to the first recess 213, wherein the width of the first side 2132 is greater than or equal to the width of the second side 2134.
When width W of first side 2132 3 Width W of second side 2134 4 Are equal (W) 3 ＝W 4 ) The cross-sectional shape of the first recess 213 may be square or rectangular (see fig. 3); when width W of first side 2132 3 Is greater than the width W of the second side 2134 4 And a width W of the second side 2134 4 Time other than zero (W) 3 >W 4 ，W 4 >0) The cross-sectional shape of the first recess 213 may be trapezoidal (see fig. 8); when width W of first side 2132 3 Is greater than the width W of the second side 2134 4 And a width W of the second side 2134 4 Is zero (W) 3 >W 4 ，W 4 = 0), the sectional shape of the first recess 213 may be triangular (see fig. 1)Fig. 9) and arc (see fig. 10).
It is understood that the cross-sectional shape of the first recess 213 includes, but is not limited to, the above-described shapes.
The shape and size of the first recess 213 are flexibly designed, and the shape and size of the first recess 213 can be optimized according to the improvement of the skew effect of the first and second tabs 30 and 40, thereby solving the skew problem of the first and second tabs 30 and 40. The size of the first recessed portion 213 can be designed only by modifying a pit punching mold or a packaging end enclosure for the packaging bag 20, and this procedure has no corrosion risk and does not need to add other additional procedures; the first recess 213 is formed with a low requirement for the dimensional accuracy of the electrochemical device 100.
Referring to fig. 6 again, the second wire connecting piece 40 protrudes from the first end 23 of the packaging bag 20, the first recess 213 is located between the first wire connecting piece 30 and the second wire connecting piece 40, and the width W of the first recess 213 2 Is less than or equal to the distance D between the first and second wire lugs 30 and 40 1 。
The number of the recesses on the first housing 21 is not limited to one. Referring to fig. 5 again, the first non-sealing region 212 is disposed adjacent to the first sealing region 211 and faces the third recessed portion 214 of the accommodating space 25, and the first recessed portion 213 and the third recessed portion 214 are disposed on two sides of the first connecting tab 30.
Further, referring to fig. 11, the width W of the third recess 214 5 Is less than or equal to the distance D between the first wire connecting piece 30 and the end A of the first sealing region 211 2 The terminal point a is located at one side of the first tab 30 and away from the second tab 40.
Referring to fig. 12, in another embodiment, the second tab 40 and the first tab 30 are located at opposite sides of the electrode assembly 10. For example, the second tab 40 and the first tab 30 are respectively located at opposite sides of the electrode assembly 10. The second tab 40 protrudes from the second end 24 of the packaging bag 20, the first housing 21 further includes a third sealing region 215 located at the second end 24, the third sealing region 215 is connected to the first non-sealing region 212, that is, the first non-sealing region 212 is located between the first sealing region 211 and the third sealing region 215, the first non-sealing region 212 is provided with a fourth recess 216 near the third sealing region 215, and the fourth recess 216 is located at one side of the second tab 40.
It is understood that an insulator 50 may also be disposed between the fourth recess 216 and the electrode assembly 10.
An embodiment of the present application further provides an electronic device 200, and the electronic device 200 includes the electrochemical device 100. The electronic device 200 may be a consumer electronic product (such as a mobile communication device, a tablet computer, a notebook computer, a wearable device, etc.), an electric tool, an unmanned aerial vehicle, an energy storage device, a power device, etc. Referring to fig. 13, in an embodiment, the electronic device 200 is a mobile communication device.
Although the present application has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the present application.
Claims (10)
1. An electrochemical device, comprising:
an electrode assembly;
a packaging pouch including a first case and a second case combined with each other to form a receiving space for receiving the electrode assembly;
a first tab electrically connected to the electrode assembly and protruding from a first end of the pouch; and
a second tab electrically connected to the electrode assembly;
wherein the first housing includes a first sealing region and a first non-sealing region, the first sealing region being located at the first end, the first non-sealing region being connected to the first sealing region,
first non-seal district is close to first seal district sets up the orientation accommodation space's first depressed part, first depressed part is located first lug is close to one side of second lug or is located first lug is kept away from one side of second lug, first depressed part is used for reducing the encapsulation bag with distance between the electrode subassembly.
2. The electrochemical device according to claim 1, wherein the second case includes a second sealing region and a second non-sealing region, the second sealing region is located at the first end, the second non-sealing region is connected to the second sealing region, the first sealing region and the second sealing region are joined, the second non-sealing region is provided adjacent to the second sealing region with a second recess facing the receiving space, and the second recess is located at one side of the first tab.
3. The electrochemical device according to claim 2, wherein the first recess and the second recess are oppositely disposed, and the first sealing region extends to at least a partial region of the first recess.
4. The electrochemical device according to claim 1, wherein an insulator is provided at a position of the electrode assembly corresponding to the first recess.
5. The electrochemical device of claim 4, wherein a width of the insulator is greater than or equal to a width of the first recess.
6. The electrochemical device according to claim 1, wherein the first recess has a cross-sectional shape of one of a triangle, a rectangle, a square, a trapezoid, or an arc.
7. The electrochemical device according to claim 1, wherein the second tab protrudes from the first end of the pouch, the first recess is located between the first tab and the second tab, and a width of the first recess is less than or equal to a distance between the first tab and the second tab.
8. The electrochemical device according to claim 7, wherein the first non-sealing region is provided adjacent to the first sealing region with a third recess facing the receiving space, the first recess and the third recess being located at both sides of the first tab.
9. The electrochemical device according to claim 1, wherein the second tab protrudes from a second end of the pouch, the first case further comprises a third sealing region at the second end, the third sealing region being connected to the first non-sealing region, the first non-sealing region being provided with a fourth recess portion adjacent to the third sealing region, the fourth recess portion being located at a side of the second tab.
10. An electronic device comprising the electrochemical device of any one of claims 1 to 9.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2020/080967 WO2021189263A1 (en) | 2020-03-24 | 2020-03-24 | Electrochemical device and electronic device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113597701A CN113597701A (en) | 2021-11-02 |
| CN113597701B true CN113597701B (en) | 2023-04-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202080007924.8A Active CN113597701B (en) | 2020-03-24 | 2020-03-24 | Electrochemical device and electronic device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN113597701B (en) |
| WO (1) | WO2021189263A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115189078B (en) * | 2022-05-09 | 2023-11-14 | 东莞新能源科技有限公司 | Packaging shell, electrochemical device, preparation method of electrochemical device and electronic device |
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| CN103081161A (en) * | 2010-08-05 | 2013-05-01 | 株式会社Lg化学 | Secondary battery pouch having improved stability, pouch-type secondary battery using same, and medium- or large-sized battery pack |
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| CN209592088U (en) * | 2019-01-08 | 2019-11-05 | 宁德新能源科技有限公司 | Packaging bag and lithium ion battery for battery |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5032063B2 (en) * | 2006-06-06 | 2012-09-26 | 株式会社東芝 | Non-aqueous electrolyte battery, battery pack and automobile |
| CN201766106U (en) * | 2010-09-19 | 2011-03-16 | 东莞新能源科技有限公司 | Flexible package battery |
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2020
- 2020-03-24 WO PCT/CN2020/080967 patent/WO2021189263A1/en active Application Filing
- 2020-03-24 CN CN202080007924.8A patent/CN113597701B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002025514A (en) * | 2000-07-12 | 2002-01-25 | Nec Mobile Energy Kk | Sealed battery |
| CN103081161A (en) * | 2010-08-05 | 2013-05-01 | 株式会社Lg化学 | Secondary battery pouch having improved stability, pouch-type secondary battery using same, and medium- or large-sized battery pack |
| CN106129481A (en) * | 2016-06-29 | 2016-11-16 | 珠海光宇电池有限公司 | The preparation method of takeup type spill battery core and battery core |
| CN209592088U (en) * | 2019-01-08 | 2019-11-05 | 宁德新能源科技有限公司 | Packaging bag and lithium ion battery for battery |
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| Publication number | Publication date |
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| WO2021189263A1 (en) | 2021-09-30 |
| CN113597701A (en) | 2021-11-02 |
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