CN219759774U - Shell and cylindrical battery comprising same - Google Patents
Shell and cylindrical battery comprising same Download PDFInfo
- Publication number
- CN219759774U CN219759774U CN202320445295.8U CN202320445295U CN219759774U CN 219759774 U CN219759774 U CN 219759774U CN 202320445295 U CN202320445295 U CN 202320445295U CN 219759774 U CN219759774 U CN 219759774U
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- China
- Prior art keywords
- shell
- sealing
- sealing part
- housing
- injection molding
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- 238000007789 sealing Methods 0.000 claims abstract description 93
- 238000001746 injection moulding Methods 0.000 claims abstract description 24
- 238000003466 welding Methods 0.000 claims description 39
- 229910000831 Steel Inorganic materials 0.000 claims description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 10
- 229910052782 aluminium Inorganic materials 0.000 claims description 10
- 239000010959 steel Substances 0.000 claims description 10
- 230000000903 blocking effect Effects 0.000 claims description 4
- 239000003292 glue Substances 0.000 abstract description 5
- 230000006872 improvement Effects 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 230000003446 memory effect Effects 0.000 description 1
Landscapes
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The utility model relates to the technical field of batteries, in particular to a shell, which comprises a first shell and a second shell, wherein the first shell comprises a first sealing part and a first connecting part connected with the first sealing part, and the second shell comprises a second sealing part and a second connecting part connected with the second sealing part; the surfaces of the first sealing part and the second sealing part, which are used for sealing connection, are provided with nanoscale holes, and the first sealing part is in sealing connection with the second sealing part through an injection molding process; the first connecting part and the second connecting part are both used for being electrically connected with the electrode of the battery cell unit. The utility model solves the technical problem that the prior art adopts insulating glue to seal and degum; in addition, the pole column of the traditional cylindrical battery is replaced by the first connecting part and the second connecting part, the current carrying area is increased, the technical problem of poor overcurrent capacity is solved, and the shell can be suitable for high-rate charge and discharge of the high-capacity cylindrical battery. In addition, the utility model also discloses a cylindrical battery comprising the shell.
Description
Technical Field
The utility model relates to the technical field of batteries, in particular to a shell and a cylindrical battery comprising the shell.
Background
The lithium battery has the advantages of small volume, large capacity, long service life, low self-discharge rate, no memory effect, green environmental protection and the like, and is widely applied to commercial vehicles, special vehicles, electric bicycles, energy storage systems, medical appliances and the like at present.
With the continuous development of new energy automobiles, the market share of the new energy automobiles is continuously expanded. Compared with the traditional fuel oil automobile, the popularization of the new energy automobile can reduce the pollution to the atmosphere. At present, in order to improve market competitiveness, a new energy automobile must catch up with and even surpass the traditional fuel automobile in the aspects of endurance mileage, environmental adaptability, service life, purchase cost and the like, which also brings higher challenges to the technical development of a battery pack, so that batteries with high energy density become a development trend, and cylindrical batteries are high in grouping efficiency and good in consistency, and have wide application prospects.
The sealing of traditional cylindrical battery shell adopts insulating glue to seal generally, but adopts this kind of sealing mode effect not good, has used for a long time can appear the condition of coming unstuck, leads to corresponding cylindrical battery life to shorten. In addition, the contact area of the traditional cylindrical battery pole (the pole is arranged at the center of the top and the bottom of the shell, and the corresponding current carrying area is small) is small, so that the problem of poor overcurrent capacity is caused, and the high-rate charge and discharge of the high-capacity cylindrical battery are not suitable.
Disclosure of Invention
One of the objects of the present utility model is: aiming at the defects of the prior art, the shell with good sealing effect and over-high current is provided.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a shell, comprising a first shell and a second shell, wherein the first shell comprises a first sealing part and a first connecting part connected with the first sealing part, and the second shell comprises a second sealing part and a second connecting part connected with the second sealing part; the surfaces of the first sealing part and the second sealing part, which are used for sealing connection, are provided with nanoscale holes, and the first sealing part is in sealing connection with the second sealing part through an injection molding process; the first connecting part and the second connecting part are both used for being electrically connected with the electrode of the battery cell unit.
The surfaces of the first sealing part and the second sealing part, which need sealing treatment, are subjected to chemical treatment to form nanoscale holes at corresponding parts of the first sealing part and the second sealing part, and then the first sealing part and the second sealing part are subjected to sealing connection through an injection molding process, so that the sealing performance of the first shell and the second shell is ensured, the bonding strength of the first shell and the second shell is improved, and the technical problem that sealing is carried out by adopting insulating glue to remove glue in the prior art is solved; in addition, the first connecting portion and the second connecting portion are both used for being electrically connected with the electrode of the battery cell unit, the first connecting portion and the second connecting portion replace the pole of the traditional cylindrical battery, the current carrying area is increased, the technical problem of poor overcurrent capacity is solved, and the shell can be suitable for high-rate charge and discharge of the high-capacity cylindrical battery.
As an improvement of the housing of the present utility model, after the first sealing portion and the second sealing portion are sealed and connected, an injection molding member is formed, and the injection molding member is located between the first sealing portion and the second sealing portion, and is used for blocking the first sealing portion and the second sealing portion from contacting.
As an improvement of the housing of the present utility model, the length L1 of the injection molding is greater than or equal to the length L2 of the first sealing portion, and the length L1 of the injection molding is greater than or equal to the length L3 of the second sealing portion.
As an improvement of the housing according to the utility model, the first connection part and the second connection part are each provided with a welding projection for surface connection with the electrode of the cell unit.
As an improvement of the housing according to the utility model, the first connecting part is provided with a welding projection for surface connection with the electrode of the cell unit.
As an improvement of the case according to the present utility model, the second connection portion is provided with a welding protrusion for surface connection with the electrode of the battery cell.
As an improvement of the housing of the present utility model, the first housing and the second housing are cylindrical in shape, and each of the first housing and the second housing has a sleeve structure having an opening at one end.
As an improvement of the housing according to the present utility model, the first housing and the second housing are made of steel or aluminum, and when the first housing is made of steel, the second housing is made of aluminum, and when the first housing is made of aluminum, the second housing is made of steel.
Another object of the present utility model is to provide a cylindrical battery including the above-mentioned casing, which includes at least one cell unit, each of which is bent and extended with a positive end face and a negative end face, respectively; the first connecting portion is welded with each positive end face, and the second connecting portion is welded with each negative end face.
As an improvement of the cylindrical battery of the present utility model, the welding protrusion of the first connecting portion is welded to each of the positive electrode end faces, and the welding protrusion of the second connecting portion is welded to each of the negative electrode end faces.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and do not constitute a limitation on the utility model. In the drawings:
FIG. 1 is a schematic structural diagram of embodiment 1 of the present utility model;
FIG. 2 is a schematic structural diagram of embodiment 2 of the present utility model;
FIG. 3 is a schematic structural view of embodiment 3 of the present utility model;
FIG. 4 is a schematic structural view of embodiment 4 of the present utility model;
the battery comprises a first shell, a second shell, a 3-battery cell unit, a 4-injection molding piece, a 5-welding convex part, a first sealing part and a first connecting part, wherein the first shell is 1-first, the second shell is 2-second, the 3-battery cell unit is 4-injection molding piece, the 5-welding convex part is 11-first sealing part, and the first connecting part is 12-first;
21-a second sealing part, 22-a second connecting part;
31-positive end face, 32-negative end face.
Detailed Description
Certain terms are used throughout the description and claims to refer to particular components. Those of skill in the art will appreciate that a hardware manufacturer may refer to the same component by different names. The description and claims do not take the form of an element differentiated by name, but rather by functionality. As used throughout the specification and claims, the word "comprise" is an open-ended term, and thus should be interpreted to mean "include, but not limited to. By "substantially" is meant that within an acceptable error range, a person skilled in the art is able to solve the technical problem within a certain error range, substantially achieving the technical effect.
In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "horizontal", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
The present utility model will be described in further detail below with reference to the drawings, but is not limited thereto.
Example 1
As shown in fig. 1, a housing includes a first housing 1 and a second housing 2, the first housing 1 includes a first sealing portion 11 and a first connecting portion 12 connected to the first sealing portion 11, and the second housing 2 includes a second sealing portion 21 and a second connecting portion 22 connected to the second sealing portion 21;
wherein, the surfaces of the first sealing part 11 and the second sealing part 21 for sealing connection are formed with nano-scale holes (not shown), and the first sealing part 11 is in sealing connection with the second sealing part 21 through an injection molding process; then the surfaces of the first sealing part 11 and the second sealing part 21 which need sealing treatment are subjected to chemical treatment, so that the corresponding parts which need sealing form nanoscale holes, and then the sealing connection is carried out on the surfaces through an injection molding process, so that the sealing performance of the first shell 1 and the second shell 2 is ensured, the bonding strength of the surfaces is improved, and the technical problem that the sealing is carried out by adopting insulating glue to degum in the prior art is solved; in addition, the materials injected by the injection molding process have insulating properties, so that the insulating properties of the first sealing part 11 and the second sealing part 21 connected by the injection molding process are better, the insulating barrier of the first shell 1 and the second shell 2 is well disconnected, and the first shell 1 and the second shell 2 are effectively prevented from being short-circuited due to conduction.
The first connecting portion 12 and the second connecting portion 22 of this embodiment are both used for electrically connecting with the electrode of the battery cell unit 3, the first connecting portion 12 and the second connecting portion 22 replace the pole of the conventional cylindrical battery, and the first connecting portion 12 and the second connecting portion 22 belong to a part of the first casing 1 and the second casing 2, so that the whole first casing 1 and the second casing 2 are all poles of the cylindrical battery, the current carrying area is increased, the technical problem of poor overcurrent capability is solved, and the casing can be suitable for high-rate charge and discharge of the high-capacity cylindrical battery.
Preferably, after the first sealing portion 11 and the second sealing portion 21 are in sealing connection, an injection molding piece 4 is formed, the injection molding piece 4 is located between the first sealing portion 11 and the second sealing portion 21, and the injection molding piece 4 is used for blocking the first sealing portion 11 and the second sealing portion 21 from contacting, so that an insulation system is formed between the first shell 1 and the second shell 2, and a short circuit phenomenon caused in an operation process after the electric core is assembled is prevented.
Further, the length L1 of the injection molding member 4 is greater than or equal to the length L2 of the first sealing portion 11, and the length L1 of the injection molding member 4 is greater than or equal to the length L3 of the second sealing portion 21, so that the contact between the first sealing portion 11 and the second sealing portion 21 is further blocked, and the blocking effect can be well achieved even under the condition that the corresponding battery is severely deformed, and the service life of the cylindrical battery is greatly prolonged.
Preferably, the first connecting part 12 and the second connecting part 22 are both provided with welding convex parts 5, the welding convex parts 5 are used for surface connection with the electrodes of the battery cell 3, the welding surfaces of the welding convex parts 5 and the welding surfaces of the electrodes of the battery cell 3 are tightly connected surface by surface, and the connecting modes are connected in a welding mode, so that the overcurrent capacity of the utility model is further improved, the point-to-point and point-to-surface welding modes in the prior art are avoided, however, the virtual welding easily occurs in the welding mode in the prior art, thereby causing bad products and affecting the stability of product connection; in addition, the welding convex part 5 can also prevent the situation of shaking after the assembly of the battery cell unit 3, is used for supporting and fixing the battery cell unit 3, saves the cost of adopting other structures to fix the battery cell unit 3, and ensures that the whole battery is simpler and more compact.
In this embodiment, the first casing 1 and the second casing 2 are cylindrical, and the first casing 1 and the second casing 2 are sleeve structures with openings at one ends, and the first casing 1 may be sleeved outside the second casing 2 or the second casing 2 may be sleeved outside the first casing 1, which may be set according to requirements.
Furthermore, the materials of the first casing 1 and the second casing 2 are steel or aluminum, when the material of the first casing 1 is steel, the material of the second casing 2 is aluminum, when the material of the first casing 1 is aluminum, the material of the second casing 2 is steel, and the setting principle of the materials of the first casing 1 and the second casing 2 is as follows: the corresponding shell made of steel needs to be connected with the negative electrode of the battery cell unit 3, and the corresponding shell made of aluminum needs to be connected with the positive electrode of the battery cell unit 3, so that corrosion can be prevented, and the service life is prolonged.
Example 2
As shown in fig. 2, the structure different from that of embodiment 1 is: the first connection portion 12 of the present embodiment is provided with a welding protrusion 5, and the welding protrusion 5 is for surface connection with the electrode of the cell unit 3; the second connection portion 22 of the present embodiment is not provided with the welding protrusion 5, and is provided only on the first connection portion 12, so that the process of forming the welding protrusion 5 by the second connection portion 22 is reduced, the process can be saved, the welding between the second connection portion 22 and the electrode of the cell unit 3 can be directly adopted for replacing, and the effect of welding between the surfaces can be realized, therefore, the arrangement can save the cost and improve the production efficiency.
The other structures are the same as those of embodiment 1, and will not be described here again.
Example 3
As shown in fig. 3, the structure different from that of embodiment 2 is: the second connection portion 22 of the present embodiment is provided with the welding protrusion 5, the welding protrusion 5 is used for surface connection with the electrode of the battery cell unit 3, the first connection portion 12 of the present embodiment is not provided with the welding protrusion 5, only the second connection portion 22 is provided, just contrary to the arrangement of the embodiment 1, of course, the first connection portion 12 and the electrode of the battery cell unit 3 may be directly adopted for welding instead of the procedure, thereby realizing the same technical effect as the embodiment 2, saving the cost, and improving the production efficiency.
The other structures are the same as those of embodiment 2, and will not be described here again.
Example 4
As shown in fig. 4, the structure different from that of embodiments 2 to 3 is: the first connecting portion 12 and the second connecting portion 22 of the present embodiment are not provided with the welding convex portion 5, and the first connecting portion 12 and the second connecting portion 22 are directly connected with the electrode of the battery cell unit 3 respectively to replace the welding convex portion, so that the working procedure can be further saved, and the production efficiency is improved.
Other structures are the same as those of embodiments 2 to 3, and will not be described here again.
Example 5
As shown in fig. 1-4, a cylindrical battery comprising any one of the cases of embodiments 1-3 includes at least one cell unit 3, each cell unit 3 is respectively bent and extended with a positive electrode end face 31 and a negative electrode end face 32, the positive electrode end face 31 and the negative electrode end face 32 are respectively electrically connected with a positive electrode bus plate and a negative electrode bus plate of the cell unit 3, the first connection portion 12 is welded with each positive electrode end face 31, and the second connection portion 22 is welded with each negative electrode end face 32, so that the first connection portion 12 and the second connection portion 22 realize the electrical connection of the positive electrode bus plate and the negative electrode bus plate, thereby realizing the charge and discharge of the cylindrical battery of the embodiment.
Obviously, the first connecting portion 12 and the second connecting portion 22 of the present embodiment replace the small polar columns of the conventional cylindrical battery, so that the current carrying area is increased, and the power performance of the cylindrical battery of the present embodiment is ensured by large current in the process of charging and discharging, thereby satisfying the use of various cylindrical batteries with high power.
Preferably, the welding protrusion 5 of the first connecting portion 12 is welded to each positive end face 31, the welding protrusion 5 of the second connecting portion 22 is welded to each negative end face 32, and the welding protrusions 5 of the first connecting portion 12 and the second connecting portion 22 are welded to the corresponding positive end face 31 and negative end face 32, so that the current carrying area is further increased, and the larger current passing can be satisfied.
It should be noted that: the cylindrical battery of this embodiment includes any of the cases of embodiments 1-3, and has further improved sealability and insulation properties relative to the cylindrical battery of the prior art; in addition, the capacity of excessive current in the process of charging and discharging the battery is enhanced, so that the cylindrical battery of the embodiment meets various application scenes, and has better practicability and wider application range.
While the foregoing description illustrates and describes several preferred embodiments of the present utility model, it is to be understood that the utility model is not limited to the forms disclosed herein, but is not to be construed as limited to other embodiments, and is capable of numerous other combinations, modifications and environments and is capable of changes or modifications within the scope of the inventive concept as described herein, either as a result of the foregoing teachings or as a result of the knowledge or technology in the relevant art. And that modifications and variations which do not depart from the spirit and scope of the utility model are intended to be within the scope of the appended claims.
Claims (10)
1. A housing, characterized in that: the device comprises a first shell and a second shell, wherein the first shell comprises a first sealing part and a first connecting part connected with the first sealing part, and the second shell comprises a second sealing part and a second connecting part connected with the second sealing part;
the surfaces of the first sealing part and the second sealing part, which are used for sealing connection, are provided with nanoscale holes, and the first sealing part is in sealing connection with the second sealing part through an injection molding process;
the first connecting part and the second connecting part are both used for being electrically connected with the electrode of the battery cell unit.
2. The housing of claim 1, wherein: the first sealing part and the second sealing part are in sealing connection, and then an injection molding piece is formed, the injection molding piece is located between the first sealing part and the second sealing part, and the injection molding piece is used for blocking the first sealing part from contacting with the second sealing part.
3. The housing of claim 2, wherein: the length L1 of the injection molding piece is greater than or equal to the length L2 of the first sealing part, and the length L1 of the injection molding piece is greater than or equal to the length L3 of the second sealing part.
4. The housing of claim 1, wherein: the first connecting portion and the second connecting portion are both provided with welding convex portions, and the welding convex portions are used for being in surface connection with electrodes of the battery cell unit.
5. The housing of claim 1, wherein: the first connecting portion is provided with a welding convex portion, and the welding convex portion is used for being in surface connection with an electrode of the battery cell.
6. The housing of claim 1, wherein: the second connecting portion is provided with a welding convex portion, and the welding convex portion is used for being in surface connection with an electrode of the battery cell.
7. The housing of claim 1, wherein: the first shell and the second shell are cylindrical in shape, and are sleeve-type structures with openings at one ends.
8. The housing of claim 1, wherein: the first shell and the second shell are made of steel or aluminum, when the first shell is made of steel, the second shell is made of aluminum, and when the first shell is made of aluminum, the second shell is made of steel.
9. A cylindrical battery comprising the housing of any one of claims 1-8, characterized in that: the battery cell comprises at least one battery cell unit, wherein each battery cell unit is respectively bent and extended with a positive end face and a negative end face;
the first connecting portion is welded with each positive end face, and the second connecting portion is welded with each negative end face.
10. The cylindrical battery as recited in claim 9, wherein: the welding convex part of the first connecting part is welded with each positive end face, and the welding convex part of the second connecting part is welded with each negative end face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320445295.8U CN219759774U (en) | 2023-03-10 | 2023-03-10 | Shell and cylindrical battery comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320445295.8U CN219759774U (en) | 2023-03-10 | 2023-03-10 | Shell and cylindrical battery comprising same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219759774U true CN219759774U (en) | 2023-09-26 |
Family
ID=88070126
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320445295.8U Active CN219759774U (en) | 2023-03-10 | 2023-03-10 | Shell and cylindrical battery comprising same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219759774U (en) |
-
2023
- 2023-03-10 CN CN202320445295.8U patent/CN219759774U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: No. 68, Xin'anjiang Road, Southeast Street, Changshu City, Suzhou City, Jiangsu Province, 215000 Patentee after: Jiangsu Zhengli New Energy Battery Technology Co.,Ltd. Country or region after: China Address before: No. 68, Xin'anjiang Road, Southeast Street, Changshu City, Suzhou City, Jiangsu Province, 215000 Patentee before: Jiangsu Zenergy Battery Technologies Co.,ltd Country or region before: China |
|
| CP03 | Change of name, title or address |