CN215418344U - Battery top cap and battery - Google Patents
Battery top cap and battery Download PDFInfo
- Publication number
- CN215418344U CN215418344U CN202023082784.7U CN202023082784U CN215418344U CN 215418344 U CN215418344 U CN 215418344U CN 202023082784 U CN202023082784 U CN 202023082784U CN 215418344 U CN215418344 U CN 215418344U
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- Prior art keywords
- battery
- battery top
- top cover
- insulating plate
- top cap
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- 239000007788 liquid Substances 0.000 claims abstract description 25
- 238000002347 injection Methods 0.000 claims abstract description 19
- 239000007924 injection Substances 0.000 claims abstract description 19
- 238000003466 welding Methods 0.000 claims description 35
- 229910052751 metal Inorganic materials 0.000 claims description 26
- 239000002184 metal Substances 0.000 claims description 26
- 239000000758 substrate Substances 0.000 claims description 22
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 15
- 238000007789 sealing Methods 0.000 claims description 10
- 238000005476 soldering Methods 0.000 claims description 9
- 229910001128 Sn alloy Inorganic materials 0.000 claims description 4
- 239000000919 ceramic Substances 0.000 claims description 4
- 239000002023 wood Substances 0.000 claims description 2
- 238000009413 insulation Methods 0.000 claims 6
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 abstract description 11
- 229910001416 lithium ion Inorganic materials 0.000 abstract description 11
- 239000000463 material Substances 0.000 abstract description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 5
- 229910052782 aluminium Inorganic materials 0.000 abstract description 4
- 229910000838 Al alloy Inorganic materials 0.000 abstract description 3
- 230000006872 improvement Effects 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 6
- 229910052802 copper Inorganic materials 0.000 description 6
- 239000010949 copper Substances 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 230000002035 prolonged effect Effects 0.000 description 5
- 239000013589 supplement Substances 0.000 description 5
- 238000004880 explosion Methods 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 239000002131 composite material Substances 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
Images
Classifications
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- 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 belongs to the technical field of lithium ion batteries, and particularly relates to a battery top cover which comprises an insulating plate and a pole arranged on the insulating plate, wherein a liquid injection hole is formed in the insulating plate. Compared with the prior art, the battery top cover made of aluminum or aluminum alloy is replaced by the insulating plate, so that the weight of the battery top cover is greatly reduced, the weight of the battery is reduced, the integral energy density of the battery is improved, and a large amount of material cost is saved. In addition, the utility model also provides a battery.
Description
Technical Field
The utility model belongs to the technical field of lithium ion batteries, and particularly relates to a battery top cover, a preparation method of the battery top cover and a battery.
Background
Lithium ion batteries are used in various industries because of their advantages of high energy density, high operating voltage, long cycle life, no memory, etc.
At present, according to the way of battery encapsulation, lithium ion batteries are mainly divided into soft package lithium ion batteries, cylindrical lithium ion batteries and square lithium ion batteries, wherein the square lithium ion batteries are generally applied to power sources of electric vehicles due to the characteristics of high space utilization rate, high production efficiency and the like, and in the square lithium ion batteries, the square lithium ion batteries mainly comprise a battery top cover, a battery shell and a bare cell. However, in the prior art, the battery top cover of the square lithium ion battery is usually made of a plate made of metal such as aluminum or aluminum alloy, so that the overall weight of the battery is inevitably increased, and the energy density of the battery is further reduced.
In view of the above, there is a need for further improvements to the above prior art to meet practical production needs.
SUMMERY OF THE UTILITY MODEL
The utility model aims to: the battery top cover effectively solves the problem that the energy density of a battery is reduced due to the fact that the metal battery top cover is heavy.
In order to achieve the purpose, the utility model adopts the following technical scheme:
the battery top cover comprises an insulating plate and a pole arranged on the insulating plate, wherein a liquid injection hole is formed in the insulating plate.
As an improvement of the battery top cap, the insulating plate is any one of a PCB substrate, a plastic plate, a ceramic plate and a wood plate, and the density range of the insulating plate is less than 2.7 multiplied by 103kg/m3. In the present invention, the insulating plate has a density of less than 2.7X 103kg/m3Compared with the traditional metal top cover, the PCB substrate has the advantages that the weight is reduced, so that the energy density of the battery is improved, and the PCB substrate is made of the substrate material of the printed circuit board, mainly a paper substrate, a glass fiber cloth substrate, a composite substrate (CEM series), a laminated multilayer board substrate or a special material substrate (such as ceramic, a metal core substrate and the like); in addition, the thickness of the insulating plate can be set to be 1-3 mm, so that structural strength of the battery top cover is prevented from being reduced due to too thin thickness, and energy density of the battery is prevented from being influenced due to too much occupied space due to too thick thickness.
As an improvement of the battery top cover, the insulating plate is coated with a metal layer on the connection surface with the pole, and the metal layer is hermetically connected with the pole through soldering. The metal layer is coated on the connecting surface of the insulating plate and the pole, so that on one hand, the pole can be supported to a certain extent, and the insulating plate and the pole can be conveniently welded; on the other hand, the overcurrent area of the pole is increased, and then the overcurrent capacity of the pole is improved, wherein the metal layer can be a copper metal layer or an aluminum metal layer, and the processing can be performed on the PCB substrate in a copper-clad or aluminum-clad mode in the production process.
As an improvement of the battery top cover, a welding layer is hermetically arranged at the liquid injection hole. In the prior art, the liquid injection hole is mainly sealed by adopting a sealing mode of 'sealing nail and laser welding', and in the utility model, the liquid injection hole is directly sealed by arranging a welding layer, wherein the welding layer is mainly a tin welding layer or a tin alloy welding layer, so that the use of the sealing nail and the working procedure of laser welding are saved, and a large amount of manufacturing cost is saved; meanwhile, because the melting point of the metal tin is lower, secondary liquid supplement can be carried out from the liquid injection hole in a heating and melting mode in later maintenance, and the service life of the battery is greatly prolonged.
As an improvement of the battery top cover, the insulating plate is provided with at least one through hole, and the welding layer is hermetically arranged at each through hole. Through holes are provided for implanting small sensors on the battery top cover, such as: the battery top cover comprises a temperature sensor, a pressure sensor, a liquid level sensor and the like, so that in the working process of the battery, the data such as the temperature, the pressure and the like in the battery can be monitored in real time, the intelligent degree of the battery top cover is improved, the through hole can also play a role in fixing, and some small electronic components are fixed on an insulating plate through the through hole, so that different functions are realized; in addition, because the traditional aluminum battery top cover is provided with the through holes and needs to be sealed by laser welding, a large number of holes cannot be formed, and the through holes can be sealed by tin soldering due to the adoption of the insulating plate top cover, so that the problem that the traditional battery top cover cannot be formed with a large number of holes is solved, more electronic components and sensors can be loaded on the battery top cover, and the intelligent degree of the battery top cover is greatly improved.
As an improvement to the battery top cap described in the present invention, the welding layer is a tin welding layer or a tin alloy welding layer. Because the melting point of tin or tin alloy is lower, the secondary liquid supplement can be carried out by heating the welding layer to melt the welding layer during the later maintenance of the battery, and the service life of the battery is prolonged.
As an improvement of the battery top cover according to the present invention, the pole includes a first base portion, a first column portion, and a second base portion, and the first base portion, the first column portion, and the second base portion are integrally connected in this order. The first base body part, the first column part and the second base body part form an I-shaped structure, and the first base body part, the first column part and the second base body part are directly locked by adopting the pole of the I-shaped structure, so that the pole is prevented from moving axially, and the degree of connection between the pole and the insulating plate is improved.
As an improvement of the battery top cover according to the present invention, the terminal includes a third base portion and a second base portion, and the third base portion and the second base portion are integrally connected. Third base part and second post portion form "T" shape structure, adopt the utmost point post of "T" shape structure, on the one hand, also can play better location and fixed effect, and on the other hand because the both ends structure of "T" shape utmost point post is different, consequently, can also play the effect of preventing staying, prevents that the workman from putting the direction of utmost point post when assembling utmost point post and turning over, improves the assembly efficiency of utmost point post.
The improved battery top cover further comprises an explosion-proof valve, the explosion-proof valve is arranged on the insulating plate, and the explosion-proof valve and the insulating plate are of an integrally formed structure. The explosion-proof valve is arranged and used for decompressing the interior of the battery, so that the effects of explosion prevention and reduction of explosion damage are achieved; the explosion-proof valve and the insulating plate are of an integrally formed structure, so that the explosion-proof valve is convenient to process, the assembling procedures are reduced, and the production efficiency is improved.
The utility model has the beneficial effects that: compared with the prior art, the battery top cover made of aluminum or aluminum alloy is replaced by the insulating plate, so that the weight of the battery top cover is greatly reduced, the weight of the battery is reduced, the integral energy density of the battery is improved, and a large amount of material cost is saved.
The utility model also provides a battery, which comprises a battery shell, a naked battery cell accommodated in the battery shell and a battery top cover packaged at the top of the battery shell, wherein the battery top cover is any one section of the battery top cover. By applying the battery top cover on the battery, the whole weight of the battery can be effectively reduced, so that the energy density of the battery is improved, in addition, the secondary liquid supplement at the later stage is facilitated, and the service life is prolonged.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of a liquid injection hole in the present invention;
FIG. 3 is a schematic view of a via structure according to the present invention;
FIG. 4 is a cross-sectional view of the present invention;
FIG. 5 is an enlarged view taken at A in FIG. 4;
FIG. 6 is a schematic structural view of another set of embodiments of a post according to the present invention;
FIG. 7 is a schematic view of the structure of a battery according to the present invention;
wherein, 1-an insulating plate; 2-pole column; 3-a welding layer; 4-an explosion-proof valve; 5-a battery housing; 6-naked electric core; 7-a battery top cover; 11-liquid injection hole; 12-a metal layer; 13-a through hole; 21-a first base portion; 22-a first cylindrical portion; 23-a second base portion; 24-a third base portion; 25-second column portion.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments, but the present invention is not limited thereto.
As shown in fig. 1 to 5, a battery top cap includes an insulating plate 1 and a post 2 disposed on the insulating plate 1, wherein the insulating plate 1 is provided with a liquid injection hole 11. In the present invention, the conventional metal battery top cap is replaced by a battery top cap using an insulating plate, wherein the insulating plate 1 mainly uses the material of a PCB substrate, i.e., a paper substrate, a glass fiber cloth substrate, a composite substrate (CEM series), a multi-layer laminateThe thickness of the laminated substrate or the substrate made of special material (such as ceramic, metal core substrate, etc.) is 1-3 mm, and the density is less than 2.7 x 103kg/m3Compared with a metal battery top cover, the battery top cover disclosed by the utility model is lighter in weight, so that the weight of the battery top cover can be effectively reduced, and the overall energy density of the battery is improved.
In addition, the welding layer 3 is arranged at the liquid injection hole 11 in a sealing mode, wherein the welding layer 3 is mainly a tin welding layer, the liquid injection hole 11 is sealed in a tin soldering mode, compared with the traditional sealing mode of sealing nails and laser welding, the scheme of the utility model omits the process of sealing the sealing nails by laser welding, saves a large amount of welding manufacturing cost, and can melt the welding layer 3 by heating the welding layer 3 in the later maintenance of the battery due to the lower melting point of metal tin, so that secondary liquid supplement can be carried out from the liquid injection hole 11, the operation is simple, the sealing can be continuously carried out by tin soldering after the liquid injection is finished, and the service life of the battery is greatly prolonged.
In the battery top cover provided by the utility model, the insulating plate 1 is subjected to copper-clad or aluminum-clad treatment on the connecting surface with the pole 2, so that the insulating plate 1 is coated with a metal layer 12 and then is hermetically connected with the pole 2 through soldering, wherein the metal layer 12 can play a certain supporting role on the pole 2 on one hand, and the insulating plate 1 and the pole 2 are convenient to weld; on the other hand, the flow area of the pole 2 is increased, and the flow capacity of the pole 2 is improved; in actual operation, a layer of tin paste can be coated in the gap between the metal layer 12 and the pole 2, and then welding is performed, so that the problem that incomplete penetration is easily caused by the mode that tin solder is heated and then penetrates into the gap between the pole 2 and the metal layer 12 is solved, and the welding effect is improved.
Preferably, one or more through holes 13 may be formed in the insulating plate 1 of the present invention, and the welding layer 3 is hermetically disposed at each through hole 13. Through holes 13 are provided for implanting small sensors on the battery top cover, such as: temperature sensor, pressure sensor, level sensor, etc. thus in the working process of the battery, can realize the real-time monitoring to data such as temperature, pressure, etc. in the battery, has improved the intelligent degree of the battery top cap, of course, this through hole 13 can also play a fixed role, fix some miniature electronic components on insulating board 1 through this through hole 13, thus realize different functions; in addition, because the traditional metal battery top cover is provided with the through holes and needs to be sealed by laser welding, a large number of holes cannot be formed, and the through holes 13 can be sealed by tin soldering due to the adoption of the insulating plate top cover, so that the problem that the traditional battery top cover cannot be formed with a large number of holes is solved, more electronic components and sensors can be loaded on the battery top cover, and the intelligent degree of the battery top cover is greatly improved.
Preferably, the explosion-proof valve 4 is further included, and the explosion-proof valve 4 is arranged on the insulating plate 1. The explosion-proof valve 4 is mainly used for decompressing the interior of the battery, and has the effects of explosion prevention and reduction of explosion damage. In addition, in order to effectively improve the production efficiency of the battery top cover, the explosion-proof valve 4 and the insulating plate 1 can be integrally formed, so that the assembly process of the explosion-proof valve 4 is omitted, and the production cost is saved.
In one embodiment of the present invention, the pole 2 includes a first base portion 21, a first column portion 22, and a second base portion 23, and the first base portion 21, the first column portion 22, and the second base portion 23 are connected in sequence to form an i-shaped structure. In the present embodiment, the pole 2 having the i-shaped structure is adopted, so that the first base portion 21, the first column portion 22, and the second base portion 23 can be directly locked to each other, thereby preventing the pole 2 from moving in the axial direction and improving the degree of connection between the pole 2 and the insulating plate 1.
In addition, as shown in fig. 6, the pole 2 of the present invention provides another embodiment, in this embodiment, the pole 2 includes a third base portion 24 and a second base portion 25, and the third base portion 24 and the second base portion 25 are connected to form a "T" shaped structure. In this embodiment, through the utmost point post 2 that adopts "T" shape structure, on the one hand, also can play better location and fixed effect, on the other hand because the both ends structure of "T" shape utmost point post 2 is different, consequently, can also play the effect of preventing staying, prevents that the workman from putting the direction of utmost point post 2 when assembling utmost point post 2 and turning over, improves utmost point post 2's assembly efficiency.
Compared with the traditional preparation of the metal top cover, the preparation method provided by the utility model is simple to operate and low in cost, and the following are a group of implementation methods provided by the utility model, but the preparation method is not limited by the utility model and specifically comprises the following steps:
step 1), opening a hole, selecting a PCB substrate with a proper size, and arranging a liquid injection hole 11 and a through hole for installing the pole 2 at a corresponding position of the PCB substrate;
step 2), copper coating treatment, namely coating copper on the surface of the through hole of the PCB substrate, which is in contact with the pole 2, so that a layer of metal copper is coated on the surface of the through hole;
step 3), welding the pole, coating solder paste between the pole 2 and the metal copper layer, and hermetically welding the pole 2 and the metal copper layer;
step 4), welding the liquid injection hole, and performing tin soldering at the position of the liquid injection hole 11 to enable the position of the liquid injection hole 11 to be sealed and covered with a tin soldering layer;
the step 3) and the step 4) can be executed simultaneously.
In addition, as shown in fig. 7, the present invention further provides a battery, which includes a battery case 5, a bare cell 6 accommodated in the battery case 5, and a battery top cover 7 packaged at the top of the battery case 5, where the battery top cover 7 is the above-mentioned battery top cover. By applying the battery top cover on the battery, the whole weight of the battery can be effectively reduced, so that the energy density of the battery is improved, in addition, the secondary liquid supplement at the later stage is facilitated, and the service life is prolonged.
Claims (10)
1. A battery top cap, characterized in that: the insulation board comprises an insulation board (1) and a pole (2) arranged on the insulation board (1), wherein a liquid injection hole (11) is formed in the insulation board (1).
2. A battery top cap according to claim 1, wherein: the insulation board (1) is any one of a PCB substrate, a plastic board, a ceramic board and a wood boardThe density range of the insulating plate (1) is less than 2.7 multiplied by 103kg/m3。
3. A battery top cap according to claim 1, wherein: the insulation board (1) with the connection face of utmost point post (2) coats and has metal level (12), metal level (12) with through soldering sealing connection between utmost point post (2).
4. A battery top cap according to claim 1, wherein: and a welding layer (3) is hermetically arranged at the liquid injection hole (11).
5. The battery top cap of claim 4, wherein: the insulating plate (1) is provided with at least one through hole (13), and the welding layer (3) is hermetically arranged at each through hole (13).
6. A battery top cap according to claim 5, wherein: the welding layer (3) is a tin welding layer or a tin alloy welding layer.
7. A battery top cap according to claim 1, wherein: the pole (2) comprises a first base body part (21), a first column part (22) and a second base body part (23), and the first base body part (21), the first column part (22) and the second base body part (23) are sequentially connected into a whole.
8. A battery top cap according to claim 1, wherein: the pole (2) comprises a third base body part (24) and a second base body part (25), and the third base body part (24) and the second base body part (25) are integrally connected.
9. A battery top cap according to claim 1, wherein: the explosion-proof valve (4) is arranged on the insulating plate (1), and the explosion-proof valve (4) and the insulating plate (1) are of an integrally formed structure.
10. A battery, characterized by: the battery top cover comprises a battery shell (5), a bare cell (6) accommodated in the battery shell (5) and a battery top cover (7) packaged at the top of the battery shell (5), wherein the battery top cover (7) is the battery top cover as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023082784.7U CN215418344U (en) | 2020-12-21 | 2020-12-21 | Battery top cap and battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023082784.7U CN215418344U (en) | 2020-12-21 | 2020-12-21 | Battery top cap and battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215418344U true CN215418344U (en) | 2022-01-04 |
Family
ID=79637305
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023082784.7U Active CN215418344U (en) | 2020-12-21 | 2020-12-21 | Battery top cap and battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215418344U (en) |
-
2020
- 2020-12-21 CN CN202023082784.7U patent/CN215418344U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220112 Address after: 215500 No. 68, Xin'anjiang Road, Southeast street, Changshu, Suzhou, Jiangsu Patentee after: Jiangsu Zenergy Battery Technologies Co.,ltd Address before: 523000 Dalang Town, Dongguan, Guangdong province Xiangshan Pine Hill Village Xiangshan Industrial Park Jiayuan Road No. 9 Patentee before: DONGGUAN TAFEL NEW ENERGY TECHNOLOGY Co.,Ltd. Patentee before: JIANGSU TAFEL NEW ENERGY TECHNOLOGY Co.,Ltd. Patentee before: SHENZHEN TAFEL NEW ENERGY TECHNOLOGY Co.,Ltd. |
|
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 215500 No. 68, Xin'anjiang Road, Southeast street, Changshu, Suzhou, Jiangsu Patentee after: Jiangsu Zhengli New Energy Battery Technology Co.,Ltd. Country or region after: China Address before: 215500 No. 68, Xin'anjiang Road, Southeast street, Changshu, Suzhou, Jiangsu Patentee before: Jiangsu Zenergy Battery Technologies Co.,ltd Country or region before: China |