CN220021219U - Square lithium battery lamination core package assembly and lamination battery - Google Patents
Square lithium battery lamination core package assembly and lamination battery Download PDFInfo
- Publication number
- CN220021219U CN220021219U CN202321145397.4U CN202321145397U CN220021219U CN 220021219 U CN220021219 U CN 220021219U CN 202321145397 U CN202321145397 U CN 202321145397U CN 220021219 U CN220021219 U CN 220021219U
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- Prior art keywords
- core pack
- battery
- core
- adhesive tape
- lithium battery
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 33
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 33
- 238000003475 lamination Methods 0.000 title claims description 28
- 239000002390 adhesive tape Substances 0.000 claims abstract description 51
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 39
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 39
- 230000000712 assembly Effects 0.000 claims description 10
- 238000000429 assembly Methods 0.000 claims description 10
- 239000000853 adhesive Substances 0.000 claims description 5
- 230000001070 adhesive effect Effects 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 239000000741 silica gel Substances 0.000 claims description 3
- 229910002027 silica gel Inorganic materials 0.000 claims description 3
- 239000004964 aerogel Substances 0.000 abstract description 14
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 7
- 229910001416 lithium ion Inorganic materials 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 238000001556 precipitation Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 239000004411 aluminium Substances 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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
- Battery Mounting, Suspending (AREA)
Abstract
The utility model provides a square lithium battery laminated core pack assembly and a laminated battery, comprising a core pack body and a first adhesive tape adhered to the outer surface of a thinned area of the core pack body, wherein the first adhesive tape is used for compensating the thickness of the thinned area, and the core pack assembly structure directly compensates the thickness of the core pack body. The laminated battery comprises a core package component and an aluminum shell, when the laminated battery is prepared, the thickness compensation is finished before the core package component is placed in the aluminum shell, and additional aerogel treatment is not needed outside the aluminum shell.
Description
Technical Field
The utility model relates to the field of laminated core package structures, in particular to a square lithium battery laminated core package assembly and a laminated battery.
Background
Square aluminum shell lithium ion power batteries are one of the main choices of current new energy automobile batteries. Among them, the lamination process is a common and effective way to produce core packs in square lithium ion batteries. In the design process of the battery core pack, in terms of safety, capacity CB value and the like, an Overhang region is designed for the positive electrode, the negative electrode and the diaphragm respectively, so that the capacity and the safety performance of the core pack are ensured. The Overhang is achieved by the size gradient of the positive plate, the negative plate and the separator (larger and larger). Meanwhile, the core package design can reduce the problem of climbing of the thickness of the edges of the pole pieces through the thinning areas of the edges of the positive pole pieces and the negative pole pieces. However, both methods result in the core pack edge having a lower thickness than the normal region in the middle of the core pack during lamination, so that the core pack is unevenly stressed in the core pack edge and the middle normal region due to the expansion stress of the core pack during use. The core package edge is because of thickness is less, and the atress is less when leading to its inflation, and the transmission channel distance between positive negative pole piece and the diaphragm increases, and then makes the transmission efficiency of lithium ion reduce, causes the core package edge to appear separating lithium, reduces the life and the security performance of core package.
In order to solve the problem, the method is to paste aerogel on the outer surface of the aluminum shell of the laminated battery. The thickness of the edge of the core package is compensated through the aerogel, so that the stress of the edge of the core package and the normal area is more uniform, and the occurrence of lithium precipitation is reduced. However, the rubberizing mode has high cost and low production efficiency, meanwhile, the volume of the battery can be increased by the aerogel attached to the battery shell, and the space utilization rate of the battery module group is low.
Disclosure of Invention
The utility model aims at: aiming at the problems that the cost is high, the production efficiency is low, the volume of the battery can be increased, and the space utilization rate of a battery module group is low in the process of preparing the laminated battery in the prior art, the utility model provides a square lithium battery laminated core pack assembly and the laminated battery.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
a square lithium battery lamination core package component comprises a core package body; the core pack body comprises a thinning area and a normal thickness area, wherein a first adhesive tape is stuck to the outer surface of the thinning area and used for compensating the thickness of the thinning area.
The utility model provides a square lithium battery laminated core pack assembly, which comprises a core pack body and a first adhesive tape attached to the outer surface of a thinned area of the core pack body, wherein the first adhesive tape is used for compensating the thickness of the thinned area, the thickness of the core pack body is directly compensated before an aluminum shell is arranged in the core pack assembly, and when the laminated battery is prepared, no additional aerogel treatment is needed outside the aluminum shell, so that the production cost is lower, the efficiency is higher, and on the other hand, the volume of the laminated battery is not increased additionally under the condition that the aluminum shell space is certain, the volume energy density of a module is improved, the space utilization rate of the module group is increased, and the laminated battery is convenient to popularize.
As a preferable mode of the utility model, the thinned area is positioned at two short side edges of the core pack body, and the normal thickness area is positioned at the middle part of the core pack body; the first adhesive tape is attached to the outer surface of the skiving area along the extending direction of the short side of the core pack body.
In order to provide the security and the capacity CB value of battery, the battery core package can appear inside anodal piece length is less than outside negative pole piece, positive pole piece, negative pole piece and diaphragm are the lamination design that length increases gradually, the body of whole square core package can appear that the minor face edge is thinner region, long limit surplus edge and middle zone are thicker region, paste the first adhesive tape along minor face extending direction and establish, can carry out thickness compensation to thinner region for after the aluminium hull was put into to core package subassembly, lamination battery overall appearance becomes thickness even, can not arouse the core package edge and appear separating lithium phenomenon after the use, guaranteed core package's life and security performance.
As a preferable mode of the utility model, a space is arranged between the first adhesive tape and the short side end part of the core pack body.
The battery comprises a positive plate and a negative plate which are overlapped in a staggered way, and the thinning area of the positive plate is preferably considered for compensation during rubberizing. When the positive electrode lithium ions move to the negative electrode, if the ion transmission channel is too long due to the existence of the positive electrode thinning area, the lithium ions cannot normally move to the negative electrode, and lithium is separated from the surface of the negative electrode during circulation. The adhesive tape is stuck on the edge of the positive plate, and the position corresponding to the negative plate is tightly pressed, so that the stress of the positive plate and the negative plate is more uniform, and the lithium precipitation problem can be effectively improved.
As a preferable mode of the utility model, the width of the thinned area is 0.5 cm-1.2 cm, and the width of the interval is 0.2 cm-0.5 cm.
As a preferable scheme of the utility model, the outer surface of the normal thickness area is also stuck with a second adhesive tape.
As a preferable mode of the utility model, the second adhesive tape is attached to the outer surface of the normal thickness area along the long edge of the core pack body.
As a preferable scheme of the utility model, the second adhesive tape is connected with the first adhesive tape to form a square frame which is attached to the outer surface of the core pack body.
In the battery recycling process, the middle part of the core pack can generate expansion force, the core pack is arranged in the aluminum shell, if the middle expansion is too large, the cycle performance of the battery can be influenced, the second adhesive tape is arranged in the long-side edge area, a point expansion stroke can be reserved for the middle expansion area, and the cycle performance of the battery is ensured.
In a preferred embodiment of the present utility model, the adhesive tape is a silica gel member.
It is another object of the present utility model to provide a laminated battery including the above-described core pack assembly.
A laminated battery comprises an aluminum shell and the square lithium battery laminated core package assembly arranged in the aluminum shell.
The utility model provides a laminated battery, which reduces the lithium precipitation risk at the edge of a core pack and prolongs the service life and the safety performance of the core pack; the outside of aluminum hull does not set up aerogel, has realized lamination battery's thickness homogeneity, simultaneously, under the certain condition in aluminum hull space, can not cause the extra increase of lamination battery's volume, has increased the space utilization of module group.
As a preferable scheme of the utility model, the laminated battery comprises at least two core package assemblies, all the core package assemblies are stacked in the thickness direction, and the first adhesive tapes are arranged between every two adjacent core package assemblies.
As a preferable scheme of the utility model, when the number of the core pack components is even, the top outer surface of the uppermost core pack body and the bottom outer surface of the lowermost core pack body do not need to be provided with a first adhesive tape or/and a second adhesive tape, so that all the core pack components can be arranged in the middle of the aluminum shell, and deflection cannot occur.
In summary, due to the adoption of the technical scheme, the beneficial effects of the utility model are as follows:
1. the utility model provides a square lithium battery laminated core package assembly, which comprises a core package body and an adhesive tape adhered to the outer surface of a thinned area of the core package body, wherein the adhesive tape is used for compensating the thickness of the thinned area, the thickness of the core package body is directly compensated by the core package assembly structure, when a laminated battery is prepared, the thickness compensation is finished before the core package assembly is put into an aluminum shell, and no additional aerogel treatment is required to be carried out outside the aluminum shell.
2. The utility model provides a laminated battery, which reduces the lithium precipitation risk at the edge of a core pack and prolongs the service life and the safety performance of the core pack; the outside of aluminum hull need not to set up aerogel, has realized the thickness homogeneity of lamination battery, simultaneously, under the certain condition in aluminum hull space, can not cause the extra increase of lamination battery's volume, has increased the space utilization of module group.
Drawings
Fig. 1 is a schematic structural view of a core pack body.
Fig. 2 is a schematic top view of the core pack assembly of the present utility model.
Fig. 3 is a schematic side view of a core pack assembly of the present utility model.
Fig. 4 is a schematic top view of the core pack assembly of the present utility model.
Fig. 5 is a schematic side view of a core pack assembly of the present utility model.
Fig. 6 is a schematic side view of a dual core pack assembly of the present utility model.
Icon:
1-a core pack body; 11-a skiving area; 12-normal thickness region; 13-a positive plate; 14-a negative plate; 2-a first adhesive tape; 21-space; 3-electrode lugs; 4-a second adhesive tape.
Detailed Description
The present utility model will be described in detail with reference to the accompanying drawings.
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
Example 1
In the prior art, the problem that the thickness of a core pack in a lithium ion laminated battery is uneven to reduce the transmission efficiency of lithium ions and reduce the service life and the safety performance of the core pack is solved. After the aluminum shell is packaged into the core package, aerogel is arranged in an outside thinning area of the aluminum shell to compensate the thickness of the thinner area, so that the whole stress of the core package is more uniform when the core package is expanded, and the occurrence of lithium precipitation is reduced. But this kind of mode cost that sets up aerogel is high, and production efficiency is low, simultaneously, sets up aerogel in the outside of aluminum hull and can make the holistic volume increase of battery, has reduced the volumetric energy density of module.
The embodiment provides a square lithium battery lamination core pack assembly, which comprises a core pack body 1; the core pack body 1 comprises a skiving area 11 and a normal thickness area 12, wherein a first adhesive tape 2 is stuck to the outer surface of the skiving area 11, and the first adhesive tape 2 is used for compensating the thickness of the skiving area 11.
This core package subassembly structure has directly compensated the thickness of core package body, has accomplished thickness compensation before the core package subassembly goes into the aluminum hull when preparing the lamination battery, need not to carry out extra aerogel to the aluminum hull outside again and handles, paste the mode of adhesive tape on the one hand, manufacturing cost is lower, and efficiency can be higher, on the other hand, under the certain condition in aluminum hull space, can not cause the extra increase of volume of lamination battery, has increased the space utilization of module group, has promoted module volume energy density.
Specifically, as shown in fig. 1, a schematic structural diagram of a core pack body 1 is provided, fig. 1 is a square core pack body 1, and two ends of a short side of the core pack body 1 are respectively connected with a tab 3. The core pack body 1 is formed by wrapping an insulating film, and the core pack body 1 comprises a diaphragm, a positive plate 13 and a negative plate 14, wherein the positive plate 13 is smaller than the negative plate 14 in length, and the positive plate 13 and the negative plate 14 are arranged in a staggered lamination mode. The short edges of the positive electrode sheet 13 and the negative electrode sheet 14 are thinned, so that the thinned areas 11 are formed on the two short edges of the core pack body 1, the thinned areas 11 are removed by the core pack body 1, and the middle part of the core pack body 1 is a normal thickness area 12. Specifically, as shown in fig. 1, a region 0.5cm inward of the short side edge is a thinned region 11.
As shown in fig. 2 and 3, a core pack assembly is provided for the core pack body of fig. 1.
The core pack assembly comprises a first adhesive tape 2, the first adhesive tape 2 is attached to the outer surface of the skiving area 11 along the extending direction of the short side of the core pack body 1, and the first adhesive tape 2 is used for compensating the thickness of the skiving area 11.
Preferably, the first adhesive tape 2 is a member made of silica gel, and the first adhesive tape 2 may be a double-sided adhesive tape member or a single-sided adhesive tape member.
In order to provide the security and the capacity CB value of battery, the battery core package can appear inside anodal piece length is less than outside negative pole piece, positive pole piece, negative pole piece and diaphragm are the lamination design that length increases gradually, the body of whole square core package can appear that the minor face edge is thinner region, long limit surplus edge and middle zone are thicker region, paste the first adhesive tape along minor face extending direction and establish, can carry out thickness compensation to thinner region for after the aluminium hull was put into to core package subassembly, lamination battery overall appearance becomes thickness even, can not arouse the core package edge and appear separating lithium phenomenon after the use, guaranteed core package's life and security performance.
Preferably, a space 21 is provided between the first adhesive strip 2 and the short side end of the core pack body 1. As shown in fig. 2 and 3, the width of the thinned region 11 is 0.5cm to 1.2cm, and the width of the first adhesive tape 2 is 0.6cm. The battery comprises a positive plate and a negative plate which are overlapped in a staggered way, and the thin area of the positive plate is preferably considered for compensation during rubberizing. Because the positive plate is smaller than the negative plate by one circle during rubberizing, lithium is unevenly separated during circulation, the adhesive tape is stuck on the edge of the positive plate, and the effect of lithium separation can be improved by compressing the position corresponding to the negative plate.
Preferably, the outer surface of the normal thickness region 12 is also stuck with a second adhesive tape 4. More preferably, as shown in fig. 4 and fig. 5, the second adhesive tape 4 is attached to the outer surface of the normal thickness area 12 along the long edge of the core pack body 1, and the second adhesive tape 4 is communicated with the first adhesive tape 2 to form a square frame attached to the outer surface of the core pack body 1. In the battery recycling process, the middle part of the core pack can generate a certain expansion phenomenon, the core pack is packaged into the aluminum shell, if the middle expansion is too large to extrude the aluminum shell, the cycle performance of the battery can be influenced, the second adhesive tape is arranged in the long-side edge area, a certain expansion stroke can be reserved for the middle expansion area, the cycle performance of the battery is ensured, and the space utilization rate of the module group is fully improved.
The embodiment also provides a laminated battery, which comprises an aluminum shell and a square lithium battery laminated core package assembly arranged in the aluminum shell and shown in fig. 4.
The battery reduces the lithium separation risk at the edge of the core pack, and prolongs the service life and the safety performance of the core pack; the outside of aluminum hull does not set up aerogel, has realized lamination battery's thickness homogeneity, simultaneously, under the certain condition in aluminum hull space, can not cause the extra increase of lamination battery's volume, has increased the space utilization of module group.
Example 2
When the laminated battery is prepared, at least two core package assemblies can be arranged in the aluminum shell, all the core package assemblies are stacked in the thickness direction, and the first adhesive tapes are arranged between every two adjacent core package assemblies. When the quantity of core package subassembly is the even number, the top surface of the core package body 1 of the upper strata and the bottom surface of the core package body 1 of the lower floor need not to set up first adhesive tape 2 or/and second adhesive tape 4 to guarantee that all core package subassemblies can set up at the middle part of aluminum hull, can not appear partially establishing.
As shown in particular in fig. 6, comprises two stacked core pack assemblies as described in fig. 4. A first adhesive tape 2 and a second adhesive tape 4 are arranged between two adjacent core package components, and adhesive tapes are not arranged on the top surface and the bottom surface of the two overlapped core package components. When the laminated battery is prepared, two superposed core-package components are arranged in an aluminum shell, so that the lithium precipitation risk at the edge of the core package is reduced, and the service life and the safety performance of the core package are prolonged; the outside of aluminum hull need not to set up aerogel, has realized the thickness homogeneity of lamination battery, simultaneously, under the certain condition in aluminum hull space, can not cause the extra increase of lamination battery's volume, has increased the space utilization of module group.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.
Claims (10)
1. A square lithium battery lamination core pack assembly is characterized by comprising a core pack body; the core pack body comprises a thinning area and a normal thickness area, wherein a first adhesive tape is stuck to the outer surface of the thinning area and used for compensating the thickness of the thinning area.
2. The square lithium battery laminated core pack assembly according to claim 1, wherein the skived area is located at two short side edges of the core pack body, and the normal thickness area is located at a middle portion of the core pack body; the first adhesive tape is attached to the outer surface of the skiving area along the extending direction of the short side of the core pack body.
3. The square lithium battery lamination core pack assembly according to claim 2, wherein a space is provided between the first adhesive strip and the core pack body short side end.
4. The square lithium battery laminated core pack assembly according to claim 3, wherein the width of the skived area is 0.5cm to 1.2cm and the width of the space is 0.2cm to 0.5cm.
5. The square lithium battery lamination core pack assembly according to claim 2, wherein a second adhesive strip is attached to the outer surface of the normal thickness region.
6. The square lithium battery laminated core pack assembly according to claim 5, wherein the second adhesive strip is attached along the long edge of the core pack body on the outer surface of the normal thickness region.
7. The square lithium battery lamination core pack assembly according to claim 6, wherein the second adhesive tape is connected with the first adhesive tape to form a square frame attached to the outer surface of the core pack body.
8. The square lithium battery lamination core pack assembly according to any one of claims 1-7, wherein the adhesive strip is a silica gel member.
9. A laminated battery comprising an aluminum casing and a square lithium battery laminated core pack assembly according to any one of claims 1-8 disposed within the aluminum casing.
10. The laminated battery according to claim 9, wherein the laminated battery comprises at least two core pack assemblies, all core pack assemblies are stacked in a thickness direction, and the first adhesive tape is arranged between adjacent core pack assemblies.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321145397.4U CN220021219U (en) | 2023-05-12 | 2023-05-12 | Square lithium battery lamination core package assembly and lamination battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321145397.4U CN220021219U (en) | 2023-05-12 | 2023-05-12 | Square lithium battery lamination core package assembly and lamination battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220021219U true CN220021219U (en) | 2023-11-14 |
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ID=88695152
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321145397.4U Active CN220021219U (en) | 2023-05-12 | 2023-05-12 | Square lithium battery lamination core package assembly and lamination battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220021219U (en) |
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2023
- 2023-05-12 CN CN202321145397.4U patent/CN220021219U/en active Active
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