CN217903249U - Battery with improved battery capacity - Google Patents
Battery with improved battery capacity Download PDFInfo
- Publication number
- CN217903249U CN217903249U CN202221784777.8U CN202221784777U CN217903249U CN 217903249 U CN217903249 U CN 217903249U CN 202221784777 U CN202221784777 U CN 202221784777U CN 217903249 U CN217903249 U CN 217903249U
- Authority
- CN
- China
- Prior art keywords
- battery
- tab
- groove
- glue
- utmost point
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
Landscapes
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The utility model provides a battery, which comprises an electric core, a shell and a pole ear; the shell is wrapped on the outer side of the battery core and comprises a top sealing part, the top sealing part is positioned on one side of the shell in the length direction, and a groove is formed in the edge of the top sealing part; be equipped with utmost point ear glue on the utmost point ear, utmost point ear and electric core electricity are connected, and utmost point ear extends to the outside of casing from top seal portion, and the one end that utmost point ear glued is located the inside of casing, and the other end that utmost point ear glued is located the recess. The utility model discloses set up the recess at the edge of top seal, and the one end that utmost point ear glued is located the inside of casing, and the other end that utmost point ear glued is located the recess, can reduce utmost point ear and glue the size that surpasss top seal edge, is favorable to reducing the occupation space that utmost point ear glued, improves the energy degree of battery.
Description
Technical Field
The utility model relates to a lithium ion battery technical field particularly, relates to a battery.
Background
With the progress of technology, mobile devices are more and more widely used. The rapid growth of mobile devices has created a great demand for high energy density batteries. At present, lithium ion batteries on the market can be classified into hard-packaged batteries with stainless steel shells or aluminum shells and soft-packaged batteries with aluminum-plastic composite films in terms of external packaging. Among them, the flexible package battery has been rapidly developed because of its higher energy density and better safety.
The soft package battery generally comprises an electric core and an aluminum plastic film package shell, wherein the front end of the electric core is provided with a tab which penetrates out of the package film and is connected with the outside during use so as to provide energy. The utmost point ear generally comprises sheetmetal and the utmost point ear glue of symmetry subsides locating utmost point ear both sides surface, and utmost point ear glue is except playing insulating effect, prevents sheetmetal and plastic-aluminum membrane direct contact and forms the short circuit, makes utmost point ear glue and plastic-aluminum membrane hot melt seal bond together through the heating when the encapsulation for encapsulate electric core, play the effect that prevents the weeping. However, when the battery is packaged, a part of the tab adhesive extends out of the aluminum plastic film packaging shell, which affects the subsequent mounting of the battery protection plate, occupies a space, and affects the energy density of the battery.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving current battery tab and lean out partial occupation space, influence the energy density's of battery problem.
In order to solve the above problems, the present invention provides a battery, which comprises an electrical core, a casing and a tab;
the shell is wrapped on the outer side of the battery core and comprises a top sealing part, the top sealing part is positioned on one side of the shell in the length direction, and a groove is formed in the edge of the top sealing part;
the battery is characterized in that tab glue is arranged on the tab, the tab is electrically connected with the battery cell, the tab extends to the outside of the shell from the top sealing part, one end of the tab glue is located in the shell, and the other end of the tab glue is located in the groove.
Further, along the length direction of casing, the top seal portion is including the seal district and the district of not sealing that sets gradually, the recess is located not seal the district.
Further, the length of the groove is less than or equal to the length of the unsealed area.
Further, along the length direction of the shell, the length of the tab glue exceeding the edge of the groove is greater than 0mm and less than or equal to 1.8mm.
Further, the width of the groove is larger than or equal to the width of the tab glue.
Further, the shape of the groove is one or a combination of several of rectangle, trapezoid, semicircle, U-shaped and arc.
Further, along the width direction of casing, at least one recess has been seted up at the edge of top seal portion, the quantity of recess with the quantity of utmost point ear is the same, just utmost point ear with the recess one-to-one sets up.
Furthermore, the casing still includes the main part, the main part includes the top surface, top seal is extended by the top surface, top seal is folded towards the top surface, the projection of utmost point ear glue in the top surface is located in the top surface.
Further, still include the protection shield, the protection shield with utmost point ear welded connection.
Furthermore, the lug outside the shell is reversely turned over along the edge of the groove toward the top surface, is connected with the protection plate, and is located outside the shell, and the projection of the lug and the lug glue on the top surface is located in the top surface.
The battery of the utility model is provided with a groove at the edge of the top sealing part, one end of the tab glue is positioned in the shell, the other end of the tab glue is positioned in the groove, the tab glue can better package the battery, so that the battery has better sealing performance, and one part of the tab glue is positioned in the groove, thereby reducing the size of the tab glue exceeding the edge of the top sealing part, being beneficial to reducing the occupied space of the tab glue and improving the energy density of the battery; and moreover, the size of the tab glue exceeding the edge of the top sealing part is reduced, the subsequent installation of a protection plate is facilitated, and the direct welding strength of the tab and the protection plate is improved.
Drawings
Fig. 1 is a schematic perspective view of a battery according to an embodiment of the present invention;
fig. 2 is a schematic front view of a battery according to an embodiment of the present invention;
fig. 3 is a schematic front view of the battery showing the seal region in the embodiment of the present invention;
fig. 4 is a schematic view of an expanded structure of the housing according to the embodiment of the present invention;
fig. 5 is a schematic view of a local structure of the battery after the tab is folded.
Description of reference numerals:
100-electric core; 200-a housing; 201-a body portion; 202-top seal; 300-pole ear; 301-tab glue; 302-a metal sheet;
2021-groove; 2022-sealing area.
Detailed Description
The technical solution of the present invention will be described in detail and clearly with reference to the accompanying drawings. In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. Furthermore, in the description of the present invention, "at least one" means one or more unless specifically limited otherwise.
In the description of the present specification, the term "on the basis of the above-described embodiments" means that a specific feature, structure, material or characteristic described in connection with the embodiment or example is included in at least one preferred embodiment or preferred example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same implementation or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
As shown in fig. 1 to fig. 5, the present embodiment provides a battery, including a battery cell 100, a casing 200, and a tab 300, where the battery cell 100 is packaged inside the casing 200, the casing 200 includes a main body portion 201, a top seal portion 202, and side seal portions (not shown in the drawings), the main body portion 201 includes a top surface, a bottom surface disposed opposite to the top surface, and a side surface connected between the top surface and the bottom surface, the top seal portion 202 extends from the top surface and is located on one side of the casing 200 in a length direction (i.e., along a y-axis direction in fig. 2), the side seal portions extend from the side surfaces and are connected to the top seal portion and are located on two sides of the casing 200 in a width direction, the side seal portions are folded towards the side surfaces, and the top seal portion 202 is folded towards the top surface; at least one groove 2021 is formed in the edge of the top seal portion 202 along the width direction of the housing 200 (i.e., along the x-axis direction in fig. 2), that is, at least one groove 2021 is formed in the edge of the side of the top seal portion 202 away from the main body portion 201.
The other end of the tab glue 301 is located in the groove 2021, which means that the other end of the tab glue 301 extends to the outside of the case 200 along the groove 2021, so that at least a part of the other end of the tab glue 301 is located in the groove 2021.
Wherein, the tab glue 301 can play insulating effect on the one hand, prevents that sheetmetal 302 and casing 200 direct contact from causing the short circuit, and the tab glue 301 on the other hand can encapsulate the battery, prevents the battery weeping, and the tab glue 301 is generally insulating glue, for example PP (polypropylene) glues. The metal sheet 302 is generally a metal sheet such as copper sheet, aluminum sheet, and nickel sheet.
The number of grooves 2021 opened at the edge of the tip seal portion 202 is the same as the number of tabs 300 extending from the tip seal portion 202 to the outside of the case 200, for example: if only one tab 300 extends from the top seal part 202 to the outside of the casing 200, the edge of the top seal part 202 is provided with only one groove 2021, and if two tabs 300 extend from the top seal part 202 to the outside of the casing 200, the edge of the top seal part 202 is provided with two grooves 2021, and the two grooves 2021 are arranged along the width direction of the casing 200; moreover, each tab 300 is arranged in one-to-one correspondence with the groove 2021, and a uniform end of the tab adhesive 301 on each tab 300 is located inside the casing 200, and the other end of the tab adhesive 301 on each tab 300 is located in the groove 2021.
Generally, however, the battery includes two tabs 300 of opposite polarity, i.e., a positive tab and a negative tab, which may be located on the same side of the case 200; the positive electrode tab and the negative electrode tab can be located on different sides of the casing 200, but in order to reduce the space volume of the battery, improve the energy density of the battery, shorten the migration distance of active lithium ions and reduce the resistance of the battery cell, on the basis of the above embodiment, the positive electrode tab and the negative electrode tab are located on the same side of the casing 200, the two electrode tabs 300 extend from the top sealing part 202 to the outside of the casing 200, two grooves 2021 are formed in the edge of the top sealing part 202, and the two electrode tabs 300 and the two grooves 2021 are arranged in a one-to-one correspondence manner.
In the embodiment, the edge of the top sealing part 202 is provided with the groove 2021, one end of the tab glue 301 is located inside the shell 200, the other end of the tab glue 301 is located in the groove 2021, the tab glue 301 can better encapsulate the battery, so that the battery has better sealing performance, and a part of the tab glue 301 is located inside the groove 2021, so that the size of the tab glue 301 exceeding the edge of the top sealing part 202 can be reduced, the occupied space of the tab glue 301 can be reduced, and the energy density of the battery can be improved; in addition, the size of the tab glue 301 exceeding the edge of the top sealing part 202 is reduced, so that the subsequent installation of a protection plate is facilitated, and the direct welding strength of the tab 300 and the protection plate is improved.
As shown in fig. 3, the top seal portion 202 includes a seal area 2022 and an unsealed area (not labeled in the figure) sequentially arranged along the length direction of the casing 200, the seal area 2022 is arranged close to the main body portion 201, the unsealed area is arranged far away from the main body portion 201, and a groove 2021 is formed in the unsealed area, so that the seal area 2022 and the unsealed area are arranged, the adhesive layer of the seal area 2022 can be prevented from overflowing to the outside of the casing 200, and the sealing performance of the top seal portion 202 can be improved.
The length of the groove 2021 (i.e., along the y-axis direction in fig. 2) is greater than 0 and less than or equal to the length of the unsealed area, specifically, the length of the unsealed area may be set to 2mm, the length of the groove 2021 may be set to greater than 0 and less than or equal to 2mm, for example, the length of the groove 2021 may be set to 1mm, 1.5mm, 1.8mm, or 2mm, thereby ensuring better sealing performance of the top seal 202 while reducing the space occupied by the tab adhesive 301.
In addition, the width of the groove 2021 (i.e., along the x-axis direction in fig. 2) is greater than or equal to the width of the tab glue 301, and generally, the width of the tab glue 301 is the widest region of the tab 300, so that the tab glue 301 along the width direction of the case 200 can be completely accommodated in the groove 2021, and the tab glue 301 is prevented from protruding out of the groove 2021 in the length direction of the case 200, thereby increasing the thickness of the top seal part 202 and affecting the energy density of the battery. Preferably, the difference between the width of the groove 2021 and the width of the tab glue 301 is greater than or equal to 2mm, for example, the width of the groove 2021 is 9mm to 17mm, and the width of the tab glue 301 is 7mm to 15mm, so that the occupied space of the tab glue 301 is reduced, the energy density of the battery is increased, and the top seal part 202 can be ensured to have better sealing performance.
The shape of the groove 2021 may be rectangular, trapezoidal, semicircular, U-shaped or arc, and the shape of the groove 2021 may also be a combination of the above shapes, which can be set by those skilled in the art according to the actual situation.
The length of the tab glue 301 is not further limited in this embodiment, and those skilled in the art may set the length according to actual situations, for example: the length of the tab glue 301 may be 0.2mm to 2mm, but it needs to be ensured that one end of the tab glue 301 is located inside the casing 200, and the other end of the tab glue 301 is located in the groove 2021.
Generally speaking, along the length direction of the casing 200, the smaller the length of the tab glue 301 in the groove 2021 is, the better the length of the tab glue 301 in the groove 2021 is, the smaller the size of the tab glue 301 exceeding the edge of the casing 200 is, the better the occupied space of the tab glue 301 is, and the higher the energy density of the battery is, but if the length of the tab glue 301 in the groove 2021 is too small, the tab 300 may directly contact with the casing 200, and there is a risk of short circuit, therefore, the length of the tab glue 301 exceeding the groove 2021 is greater than O, and less than or equal to 1.8mm, it should be noted that the length of the tab glue 301 exceeding the groove 2021 refers to the length of the tab glue 301 exceeding the edge of the groove 2021, and as shown in fig. 2, the length of the tab glue 301 exceeding the groove 2021 is D, and 0 < D is less than or equal to 1.8mm.
The length of the tab glue 301 beyond the groove 2021 may be greater than the length of the groove 2021, that is, the length of one side edge of the tab glue 301 away from the main body portion 201 is greater than the length of one side edge of the top seal portion 202 away from the main body portion 201; the length of the tab glue 301 exceeding the groove 2021 may also be less than the length of the groove 2021, that is, the length of the side edge of the tab glue 301 away from the main body portion 201 is less than the length of the side edge of the top seal portion 202 away from the main body portion 201; the length of the tab glue 301 beyond the groove 2021 may also be equal to the length of the groove 2021, that is, one side edge of the tab glue 301 away from the main body 201 is flush with one side edge of the top seal part 202 away from the main body 201. The edge of the top seal portion 202 away from the main body portion 201 refers to an area where the groove 2021 is not formed in the top seal portion 202. The setting can be performed by those skilled in the art according to actual situations. Preferably, the length of the tab compound 301 exceeding the groove 2021 is less than or equal to the length of the groove 2021, and thus the dimension of the tab compound 301 exceeding the edge of the top seal part 202 can be further reduced.
In order to reduce the space volume of the battery and improve the energy density of the battery, on the basis of the above embodiment, the top seal part 202 is folded toward the top surface, and the projection of the tab glue 301 on the top surface is positioned in the top surface.
The battery of this embodiment further includes a protection board (not shown in the figure), and the protection board can be used for performing overcharge protection, overdischarge protection, overcurrent protection, short-circuit protection, and the like on the battery, so as to protect the battery. The protection plate is coupled to the tab 300 located outside the case 200, and in particular, is welded to the metal sheet 302 located outside the case 200.
In order to further reduce the space volume of the battery and increase the energy density of the battery, as shown in fig. 5, the tab 300 located outside the case 200 is turned over along the edge of the groove 2021 toward the top surface in the opposite direction, and is connected to the protection plate, and the projections of the metal sheet 302 and the tab glue 301 located outside the case 200 on the top surface are located in the top surface, that is, the tab located outside the case 200 is turned over 180 ° along the edge of the groove 2021 toward the top surface, and the metal sheet 302 is located between the top sealing portion 202 and the protection plate, so that not only the protection plate can be welded well, but also the space volume of the battery can be prevented from being increased.
After the tab 300 located outside the housing 200 is folded, a part of the tab glue 301 may be located in a folded section, and any one area of the tab glue 301 may not be located in the folded section, where the folded section is an area where the tab 300 is bent. Preferably, any one region of the tab glue 301 is not located in the folded section, so that the thickness of the folded section can be reduced, and the energy density of the battery is further improved.
Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Various changes and modifications may be made by those skilled in the art without departing from the spirit and scope of the present disclosure, and these changes and modifications are intended to fall within the scope of the present disclosure.
Claims (10)
1. The battery is characterized by comprising a battery core, a shell and a lug;
the shell is wrapped on the outer side of the battery core and comprises a top sealing part, the top sealing part is positioned on one side of the shell in the length direction, and a groove is formed in the edge of the top sealing part;
the battery is characterized in that tab glue is arranged on the tab, the tab is electrically connected with the battery cell, the tab extends to the outside of the shell from the top sealing part, one end of the tab glue is located in the shell, and the other end of the tab glue is located in the groove.
2. The battery of claim 1, wherein the top seal portion comprises a seal region and an unsealed region arranged in sequence along the length direction of the shell, and the groove is formed in the unsealed region.
3. The cell defined in claim 2, wherein the length of the groove is less than or equal to the length of the unsealed area.
4. The battery as claimed in claim 1, wherein the length of the tab paste beyond the edge of the groove is greater than 0mm and less than or equal to 1.8mm in the length direction of the case.
5. The battery of claim 1, wherein the grooves have a width greater than or equal to the width of the tab stock.
6. The battery of claim 1, wherein the shape of the groove is one or a combination of rectangle, trapezoid, semicircle, U-shape and arc.
7. The battery of any one of claims 1 to 6, wherein at least one groove is formed in the edge of the top seal part along the width direction of the casing, the number of the grooves is the same as that of the tabs, and the tabs and the grooves are arranged in one-to-one correspondence.
8. The battery of claim 1, wherein the housing further comprises a main body portion, the main body portion comprises a top surface, the top seal portion extends from the top surface, the top seal portion is folded toward the top surface, and a projection of the tab glue on the top surface is located within the top surface.
9. The battery of claim 8, further comprising a protective plate welded to the tab.
10. The battery of claim 9, wherein the tab outside the housing is folded back along the edge of the groove toward the top surface and connected to the protection plate, and the projection of the tab and the tab glue outside the housing on the top surface is located in the top surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221784777.8U CN217903249U (en) | 2022-07-11 | 2022-07-11 | Battery with improved battery capacity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221784777.8U CN217903249U (en) | 2022-07-11 | 2022-07-11 | Battery with improved battery capacity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217903249U true CN217903249U (en) | 2022-11-25 |
Family
ID=84133698
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221784777.8U Active CN217903249U (en) | 2022-07-11 | 2022-07-11 | Battery with improved battery capacity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217903249U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117423959A (en) * | 2023-12-15 | 2024-01-19 | 珠海冠宇电池股份有限公司 | Battery and electricity utilization device |
-
2022
- 2022-07-11 CN CN202221784777.8U patent/CN217903249U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117423959A (en) * | 2023-12-15 | 2024-01-19 | 珠海冠宇电池股份有限公司 | Battery and electricity utilization device |
| CN117423959B (en) * | 2023-12-15 | 2024-03-26 | 珠海冠宇电池股份有限公司 | Battery and electricity utilization device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4628682B2 (en) | Battery unit and lithium secondary battery using the same | |
| USRE42696E1 (en) | Electrode assembly and lithium ion secondary battery using the same | |
| KR100496305B1 (en) | Pouched-type lithium secondary battery and the fabrication method thereof | |
| JP5852089B2 (en) | Improved structure jelly roll and secondary battery including the same | |
| US8394524B2 (en) | Battery unit and lithium secondary battery employing the same | |
| CN110190340A (en) | Secondary cell | |
| CN209401784U (en) | Secondary cell | |
| CN209592206U (en) | Secondary cell | |
| CN104852012A (en) | Electrochemical cell | |
| CN212571274U (en) | Lithium ion battery and electronic device | |
| CN114094045A (en) | Pole piece and battery | |
| CN217903249U (en) | Battery with improved battery capacity | |
| KR20170070401A (en) | Electrode Assembly Employed with Recess Portion on Electrode Plate and Secondary Battery Comprising the Same | |
| KR100858807B1 (en) | Pouched-type case and lithium secondary battery applying the same | |
| CN207530032U (en) | A kind of lithium ion cell polar ear of high sealing liquid-leakage preventing | |
| KR100731436B1 (en) | Pouch type Lithium Secondary Battery | |
| CN219226322U (en) | Battery pole piece | |
| CN209929397U (en) | Battery tab with high leakproofness | |
| CN219626758U (en) | Soft package lithium ion battery hem structure | |
| KR100502353B1 (en) | Battery | |
| CN112736371A (en) | Utmost point ear and laminate polymer battery | |
| CN217009499U (en) | Tab and battery | |
| CN218632365U (en) | Utmost point ear and battery | |
| CN216818566U (en) | Battery cell and battery | |
| CN220856846U (en) | Battery tab and battery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |