CN212725438U - Power battery's electric core apron, electric core, module and battery package - Google Patents
Power battery's electric core apron, electric core, module and battery package Download PDFInfo
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- CN212725438U CN212725438U CN202021258613.2U CN202021258613U CN212725438U CN 212725438 U CN212725438 U CN 212725438U CN 202021258613 U CN202021258613 U CN 202021258613U CN 212725438 U CN212725438 U CN 212725438U
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- power battery
- insulating plastic
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- utmost point
- electric core
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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
Abstract
The utility model belongs to the power battery field discloses a power battery's electric core apron, electric core, module and battery package, electric core apron includes smooth aluminum sheet, utmost point post, goes up insulating plastic ring, lower insulating plastic ring, sealing washer and welding piece, smooth aluminum sheet and utmost point post by go up the hot melt injection molding material of insulating plastic ring even as an organic whole. The utility model discloses a structural style and the assembly fixed mode of improving utmost point post replace riveting aluminium pig, can reduce utmost point post height by a wide margin, simplify assembly process, can stop welding riveting aluminium pig in-process to the fever melting of last insulating plastic circle.
Description
Technical Field
The utility model belongs to the power battery field specifically, relates to a power battery's electric core apron, electric core, module and battery package.
Background
The core power source of the electric automobile is a power battery, so the performance of the power battery is particularly important. The battery core is used as a storage unit of a common power battery and mainly comprises a cover plate, an aluminum shell and a pole group. The structure of the cover plate is the most complex, and the cover plate mainly comprises a smooth aluminum sheet and a pole. The pole has the function of conducting an internal circuit and an external circuit, the structure of the pole is very important to the stress of the battery cell, and the height of the pole has important influence on the energy density of the battery cell.
At present, mainly adopt riveting aluminium pig to carry out riveting fixed rather than when electric core utmost point post assembles, set up the riveting hole that has certain degree of depth on the riveting aluminium pig, be equipped with on the utmost point post and connect the riveting protruding portion that has a take the altitude that corresponds with this riveting hole, the height that makes this kind of utmost point post after the riveting assembly is higher, has just so compressed more electric core inner space, has influenced the holistic energy density of electric core, and its assembly process is more complicated simultaneously, and production efficiency is low. Meanwhile, the upper insulating plastic ring after injection molding can easily generate a fusing phenomenon due to high temperature in the process of welding the riveting block and the pole, and the insulating structure of the upper insulating plastic ring is damaged.
In addition, the existing sealing ring is circular and rectangular in cross section, and is generally arranged in the cover plate at an upper position and tiled on the surface of the pole. The sealing ring of this kind of structure mainly relies on after moulding plastics to link together with insulating plastic ring and carries out the gas tightness seal to utmost point post, because can't guarantee the sealing ring to the compression volume of utmost point post direction, leads to the leakproofness less than to can't play insulation protection effect.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an electric core cover plate of a power battery, which replaces a riveting aluminum block by improving the structural form and the assembly fixing mode of a pole, can greatly reduce the height of the pole, simplify the assembly process and avoid the burning and melting of an upper insulating plastic ring in the process of welding the riveting aluminum block; the air tightness of the sealing of the antipode column can be improved by improving the structural form and the installation position of the sealing ring.
In order to realize the above-mentioned purpose, first aspect, the utility model provides a power battery's electricity core apron, including smooth aluminum sheet, utmost point post, go up insulating plastic circle, lower insulating plastic circle, sealing washer and welding piece, smooth aluminum sheet and utmost point post by the hot melt injection molding material of going up insulating plastic circle is even as an organic whole.
Furthermore, the pole is of an integrated structure with three coaxially stacked cylinders, and the diameter of the middle cylinder is larger than that of the upper cylinder and larger than that of the lower cylinder.
Furthermore, the thickness of the upper cylinder is larger than that of the lower cylinder and is larger than or equal to that of the middle cylinder.
Further, the sealing ring is arranged between the pole and the welding sheet and is in a compressed state.
Further, the sealing ring has a Z-shaped cross section.
Further, the upper surface of the sealing ring is located below the center of the axial height of the pole.
Furthermore, the top of the Z-shaped section is in contact with the pole and the upper insulating plastic ring, the middle of the Z-shaped section is in contact with the pole and the welding sheet, and the bottom of the Z-shaped section is in contact with the pole.
In a second aspect, the present invention provides a power battery cell, including any one of the above technical solutions.
The third aspect, the utility model provides a power battery module, including the second aspect power battery electricity core.
In a fourth aspect, the present invention provides a power battery pack, including the third aspect, a power battery module.
Through the technical scheme, the riveting aluminum block is replaced by improving the structural form and the assembling and fixing mode of the pole, so that the height of the pole can be greatly reduced, the assembling process is simplified, and the burning and melting of the upper insulating plastic ring in the process of welding and riveting the aluminum block can be avoided; the air tightness of the sealing of the antipode column can be improved by improving the structural form and the installation position of the sealing ring.
Other features and advantages of the present invention will be described in detail in the detailed description which follows.
Drawings
Fig. 1 is an exploded view of an embodiment of a cell cover plate of a power battery of the present invention;
fig. 2 is a top view of an embodiment of a cell cover plate of the power battery of the present invention;
FIG. 3 is a sectional view taken along line A-A of FIG. 2;
fig. 4 is a partially enlarged view of the left end of fig. 3.
Description of the reference numerals
Polishing an aluminum sheet 1; a pole 2; an upper insulating plastic ring 3; a lower insulating plastic ring 4; a seal ring 5; and welding the sheet 6.
Detailed Description
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. It is to be understood that the description of the embodiments herein is for purposes of illustration and explanation only and is not intended to limit the invention.
It should be noted that, in the following description of the technical solutions of the present invention, the terms "upper" and "lower" are used when indicating the orientation or the positional relationship based on the orientation or the positional relationship shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but not for indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the present invention, "axial" refers to the direction in which the axis of a certain component extends, "radial" is the direction perpendicular to the "axial", and "circumferential" refers to the direction around the outer circumference of a certain component.
As shown in fig. 1-4, the utility model discloses an embodiment of power battery's electric core apron, including aluminium sheet 1, utmost point post 2, go up insulating plastic circle 3, lower insulating plastic circle 4, sealing washer 5 and welding piece 6, aluminium sheet 1 and utmost point post 2 by the hot melt injection molding material of last insulating plastic circle 3 is even as an organic whole. At 3 injection moulding's of last insulating plastic circle in-process, the injection molding material through the hot melt state links together utmost point post 2 and smooth aluminum sheet 1, like this, smooth aluminum sheet 1, utmost point post 2 and 3 three of last insulating plastic circle firmly even as an organic whole, can omit original riveting piece that is used for fixed utmost point post 2, make the whole height of assembly back shroud reduce, improve electric core inner space's rate of utilization, be convenient for promote its energy density, the structure weight and the cost of apron have been reduced simultaneously. The welding and fixing process of the riveting block and the pole is omitted due to the omission of the riveting block, so that the burning damage of high temperature in the welding process to the upper insulating plastic ring 3 can be avoided. As for the welding of the welding sheet 6 and the polished aluminum sheet 1, the welding position is far away from the upper insulating plastic ring 3 because the welding sheet 6 is positioned at the bottom of the polished aluminum sheet 1, and high-temperature fusing can be avoided. It should be noted that the injection molding of the upper insulating plastic ring 3 is performed under the condition that the plain aluminum sheet 1 and the pole 2 are positioned by the positioning tool, and the injection molding material in a hot melting state can fill a predefined cavity to firmly connect the three into a whole.
It should be noted that the above-mentioned terminal post 2, the upper insulating plastic ring 3, the sealing ring 5 and the welding sheet 6 are all arranged in pairs according to the positive and negative electrodes, and the above description covers the corresponding components of the positive electrode part and the negative electrode part, and is not separately described one by one, and the same applies below.
The utility model discloses an in an embodiment of power battery's electric core apron, as shown in fig. 4, utmost point post 2 is the coaxial superimposed integral type structure of three cylinders, and well cylinder diameter > upper cylinder diameter > lower cylinder diameter, and preferably, upper cylinder's thickness > lower cylinder's thickness is greater than or equal to the thickness of well cylinder. Utmost point post 2 is from last cylinder to being down respectively, well cylinder and lower cylinder, each cylinder has different axial dimensions and radial dimension, this kind of structure makes utmost point post 2's side form a plurality of steps or recess, just also can form the cavity of moulding plastics of corresponding shape, last insulating plastic circle 3 after injection moulding like this has many places bending structure, increase and utmost point post 2 and smooth aluminum sheet 1's contact and parcel area, make three's connection more firm, be favorable to improving the steadiness of assembly.
In an embodiment of the battery cover plate of the power battery of the present invention, as shown in fig. 4, the sealing ring 5 is disposed between the terminal post 2 and the welding piece 6 and is in a compressed state. Like this, sealing washer 5 is in the atress compression state of being extruded to utmost point post 2 direction by welding piece 6 always at the user state, makes sealing washer 5 inseparabler with utmost point post 2 laminating, and the gas tightness is better. Preferably, the sealing ring 5 is compressed by the weld tab 6 by at least 30%, i.e. the sealing ring 5 is compressed by at least 30%, preferably 50%, in a dimension in the radial direction of the pole 2. The material of the sealing ring 5 is fluororubber, and the compression amount can enable the sealing ring 5 made of the material to be in the best working condition of elastic deformation, so that the best elastic extrusion force on the pole 2 can be exerted, and the elastic structure cannot be damaged.
In an embodiment of the cell cover plate of the power battery of the present invention, as shown in fig. 4, the sealing ring 5 has a Z-shaped cross section. As mentioned above, the side of the pole 2 is formed with a plurality of steps or grooves, and this bent structure can be just matched with the sealing ring 5 with Z-shaped section. Specifically, the top of the Z-shaped section is in contact with the pole 2 and the upper insulating plastic ring 3, the middle of the Z-shaped section is in contact with the pole 2 and the welding sheet 6, and the bottom of the Z-shaped section is in contact with the pole 2. The top of the Z-shaped section refers to a horizontal part at the top of the Z shape, the middle part refers to a vertical part in the middle of the Z shape, the bottom refers to a horizontal part at the bottom of the Z shape, and the three parts are not overlapped. The structure is convenient for the welding sheet 6 to extrude the middle part of the Z-shaped section to compress the sealing ring 5, the extrusion contact area is increased, the extrusion force is uniformly applied to the sealing ring part contacted with the pole 2, and the compression effect is improved. Wherein, bottom length L extension has increased the insulating distance between utmost point post 2 and the welding piece 6, has avoided or has weakened the creepage phenomenon, can exert insulating protection better. The bottom length L is calculated to be 0.8mm-1.2mm, preferably 1mm, and can realize better insulation protection.
The utility model discloses an in an embodiment of power battery's electric core apron, the upper surface of sealing washer 5 is located 2 axial height of utmost point post's center is below. Sealing washer 5 sets up in 2 axial height's of utmost point post position below half promptly, and like this, sealing washer 5 more is close electric core inner space, is favorable to the very first time to completely cut off sealedly to the gas that the inside electrolytic reaction of electric core produced, avoids gaseous cluster to lead to the fact the corruption to utmost point post 2 in the peripheral gap of utmost point post 2.
The utility model discloses an in an embodiment of power battery's electric core apron, lower insulating plastic circle 4 is positive negative pole position integrated into one piece's structure, is convenient for like this with each part at utmost point post 2 radial ascending displacement control in the allowed range, is favorable to improving the assembly precision.
On the basis of above-mentioned power battery's electric core cover plate embodiment, the utility model discloses in the embodiment of the power battery electricity core of second aspect, including the aforesaid power battery's electric core cover plate, all beneficial effects that the technical scheme of consequently having above-mentioned power battery's electric core cover plate embodiment at least brought. In a similar way, the utility model discloses the power battery module of third aspect includes the power battery electricity core of second aspect, and the power battery package of fourth aspect includes the power battery module of third aspect, also has all beneficial effects that the technical scheme of above-mentioned power battery's electric core cover plate embodiment brought at least.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited thereto. In the technical idea scope of the present invention, it is possible to provide the technical solution of the present invention with a plurality of simple modifications, including combining each specific technical feature in any suitable manner, and in order to avoid unnecessary repetition, the present invention does not provide additional description for various possible combinations. These simple variations and combinations should also be considered as disclosed in the present invention, all falling within the scope of protection of the present invention.
Claims (10)
1. The utility model provides a power battery's electric core apron, includes smooth aluminum sheet (1), utmost point post (2), goes up insulating plastic circle (3), lower insulating plastic circle (4), sealing washer (5) and welding piece (6), its characterized in that, smooth aluminum sheet (1) and utmost point post (2) by the hot melt injection molding material of going up insulating plastic circle (3) is even as an organic whole.
2. The battery core cover plate of the power battery according to claim 1, wherein the pole (2) is of an integrated structure of three coaxially stacked cylinders, and the diameter of the middle cylinder is larger than that of the upper cylinder and larger than that of the lower cylinder.
3. The battery core cover plate of the power battery as claimed in claim 2, wherein the thickness of the upper cylinder is greater than the thickness of the lower cylinder and is greater than or equal to the thickness of the middle cylinder.
4. The cell cover plate of a power battery according to any one of claims 1 to 3, wherein the sealing ring (5) is arranged between the pole (2) and the welding sheet (6) and is in a compressed state.
5. The cell cover plate of a power battery according to claim 4, characterized in that the sealing ring (5) has a Z-shaped cross section.
6. The cell cover plate of a power battery according to claim 5, characterized in that the upper surface of the sealing ring (5) is located below the center of the axial height of the pole (2).
7. The battery core cover plate of the power battery according to claim 6, wherein the top of the Z-shaped cross section is in contact with the pole (2) and the upper insulating plastic ring (3), the middle of the Z-shaped cross section is in contact with the pole (2) and the welding sheet (6), and the bottom of the Z-shaped cross section is in contact with the pole (2).
8. A power battery cell, characterized by comprising the cell cover plate of the power battery of any one of claims 1 to 7.
9. A power battery module, characterized by comprising the power battery cell of claim 8.
10. A power battery pack, characterized by comprising the power battery module of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021258613.2U CN212725438U (en) | 2020-06-30 | 2020-06-30 | Power battery's electric core apron, electric core, module and battery package |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021258613.2U CN212725438U (en) | 2020-06-30 | 2020-06-30 | Power battery's electric core apron, electric core, module and battery package |
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| Publication Number | Publication Date |
|---|---|
| CN212725438U true CN212725438U (en) | 2021-03-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021258613.2U Active CN212725438U (en) | 2020-06-30 | 2020-06-30 | Power battery's electric core apron, electric core, module and battery package |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113889695A (en) * | 2021-08-31 | 2022-01-04 | 蜂巢能源科技有限公司 | Cover plate structure and assembly process thereof |
| CN114006094A (en) * | 2021-10-27 | 2022-02-01 | 深圳市乐贝可科技有限公司 | Welding-free sealed type battery core cover plate |
-
2020
- 2020-06-30 CN CN202021258613.2U patent/CN212725438U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113889695A (en) * | 2021-08-31 | 2022-01-04 | 蜂巢能源科技有限公司 | Cover plate structure and assembly process thereof |
| CN114006094A (en) * | 2021-10-27 | 2022-02-01 | 深圳市乐贝可科技有限公司 | Welding-free sealed type battery core cover plate |
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