CN219163645U - Power lithium battery structure - Google Patents
Power lithium battery structure Download PDFInfo
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- CN219163645U CN219163645U CN202320265976.6U CN202320265976U CN219163645U CN 219163645 U CN219163645 U CN 219163645U CN 202320265976 U CN202320265976 U CN 202320265976U CN 219163645 U CN219163645 U CN 219163645U
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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
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Abstract
The utility model discloses a power lithium battery structure, which comprises a battery winding core, wherein the battery winding core is arranged in an aluminum shell with an opening at one end, a cover plate is arranged on one side of the opening of the aluminum shell, a positive electrode lug and a negative electrode lug of the battery winding core are positioned on different sides of the cover plate, a positive electrode pole and a negative electrode pole are respectively arranged at two ends of the cover plate, the positive electrode lug and the positive electrode pole as well as the negative electrode lug and the negative electrode pole are connected through split type connecting pieces, the split type connecting pieces comprise a lug connecting piece and a pole connecting piece, the lug connecting piece comprises a positive electrode connecting piece and a negative electrode connecting piece, and the positive electrode connecting piece and the negative electrode connecting piece are respectively connected with the pole connecting piece through a matched connecting structure. The utility model has the main purpose of simplifying the connection mode between the connecting sheets, effectively increasing the internal space of the positive electrode connecting sheet and the negative electrode connecting sheet without affecting the assembly and welding of the battery, and improving the capacity and the energy density of the battery.
Description
Technical Field
The utility model relates to the technical field of power lithium batteries, in particular to a power lithium battery structure.
Background
Along with the increasing difficulty of environmental problems, energy conservation and emission reduction are increasingly focused by people, so that the development of new energy automobiles is a necessary choice for economic transformation under the pressure of low carbon emission reduction in China. The lithium battery industry is a main development scheme of the new energy industry at present. Under the power cell requirement, the cell required energy density, capacity and height space all have considerable challenges for the design of the internal structure of the cell. The current battery core internal design mainly requires that the winding core is welded with the connecting sheet after the electrode lug is arranged at the top end, and the connecting sheet is welded with the cover plate in a transfer way, so that the battery core is finally manufactured. This results in some wastage of headspace, which can reduce the capacity and energy density of the cells to some extent.
Through retrieving, chinese patent CN207743266U discloses a novel reverse riveting cover plate structure, including top cover plate and upset piece, still include: a negative electrode terminal assembled with the top cover sheet in an insulated manner, the negative electrode terminal being laser welded after being riveted with the first connecting sheet at one side thereof located inside the battery; the positive terminal and the top cover sheet are assembled in an mutually insulated mode, and the positive terminal is riveted with the second connecting sheet at one side of the positive terminal positioned in the battery and then subjected to laser welding; the first insulating pad is provided with a limiting part and a groove part, the limiting part is sleeved on the negative terminal along the outer edge of the negative terminal in the horizontal direction, and the groove part corresponds to the overturning piece, so that the overturning piece is contacted with the negative terminal when in the power-off position; and the plastic cover plate is provided with an upper side surface and a lower side surface, and a cavity for configuring the turnover piece is formed among the upper side surface, the top cover plate, the first insulating pad and the negative electrode terminal. In this scheme, the connected mode between top cap piece, connection piece, positive electrode terminal and the negative electrode terminal is complicated, and it is more to occupy battery space moreover, does not utilize the improvement battery space utilization.
Disclosure of Invention
1. Technical problem to be solved by the utility model
The utility model provides a power lithium battery structure, which simplifies the connection mode between a connecting sheet and a cover plate and solves the problem of low utilization rate of the internal space of a battery core caused by complex connection mode between the connecting sheet and the cover plate.
2. Technical proposal
In order to achieve the above purpose, the technical scheme provided by the utility model is as follows:
the utility model provides a power lithium battery structure, includes the battery roll core, the battery roll core sets up in one end open-ended aluminum hull, and the battery roll core is located one side of aluminum hull open-ended and sets up the apron, anodal utmost point ear and negative pole utmost point ear and the apron of battery roll core are located different sides, the both ends of apron set up anodal utmost point post and negative pole utmost point post respectively, anodal utmost point ear and anodal utmost point post and negative pole utmost point ear are all connected through split type connection piece with the negative pole utmost point post, split type connection piece includes utmost point ear connection piece and utmost point post connection piece, the utmost point ear connection piece includes anodal connection piece and negative pole connection piece, anodal connection piece and negative pole connection piece are connected through cooperation connection structure with the utmost point post connection piece respectively.
Further, cooperation connection structure is mosaic structure, mosaic structure including being located the first concatenation end on the utmost point post connection piece to and be located the second concatenation end on anodal connection piece and the negative pole connection piece, first concatenation end and second concatenation end splice each other together.
Further, the cooperation connection structure is the joint structure, the joint structure include the joint end that is located on the utmost point post connection piece to and be located the joint slot hole on anodal connection piece and the negative pole connection piece, the joint end stretches into in the joint slot hole.
Further, the cooperation connection structure is the joint structure, the joint structure include the joint slot hole that is located on the utmost point post connection piece to and be located the joint end on anodal connection piece and the negative pole connection piece, the joint end stretches into in the joint slot hole.
Further, the cooperation connection structure is overlap joint structure, overlap joint structure including being located the first overlap joint end on the utmost point post connection piece to and be located the second overlap joint end on anodal connection piece and the negative pole connection piece, first overlap joint end and second overlap joint end overlap joint each other together.
Further, the cooperation connection structure is the socket joint structure, the socket joint structure including being located the first crooked end that cup joints on the utmost point post connection piece to and be located the second crooked end that cup joints on anodal connection piece and the negative pole connection piece, first crooked end and the second crooked end that cup joints each other are in the same place.
Further, the tail ends of the first bending sleeving end and the second bending sleeving end are bent into hooks which are matched with each other.
Further, at the matched connection structure, the pole connection piece, the positive electrode connection piece and the negative electrode connection piece are fixed through laser welding, and a laser welding seam is formed.
Further, the laser weld is located on a side of the mating connection structure that is remote from the battery winding core.
Further, the side surfaces of the positive electrode connecting sheet and the negative electrode connecting sheet, which are in contact with the aluminum shell, are coated with winding core rubber coating.
3. Advantageous effects
Compared with the prior art, the technical scheme provided by the utility model has the following beneficial effects:
(1) According to the structure of the power lithium battery, the positive electrode lug and the negative electrode lug of the battery winding core are positioned at two ends, the lug and the pole post are connected through the split type connecting piece, the pole post connecting piece is respectively connected with the positive electrode connecting piece and the negative electrode connecting piece through the matched connecting structure, the contact area of the connecting part of the pole post connecting piece and the positive electrode connecting piece and the negative electrode connecting piece is enlarged through the matched connecting structure, the fixing force between the pole post connecting piece and the positive electrode connecting piece and the negative electrode connecting piece can be increased, the connection of the pole post connecting piece and the positive electrode connecting piece and the negative electrode connecting piece is firm, the occupied space is small, and therefore the utilization rate of the internal space of the battery core is improved.
(2) The power lithium battery structure provided by the utility model has the advantages that the matching connection structure comprises a splicing structure, a clamping structure, a lap joint structure or a sleeving structure, the structure is simple, and the operation is easy. The matched connection structure of the pole connection piece, the positive electrode connection piece and the negative electrode connection piece is further subjected to laser welding, so that the pole connection piece and the positive electrode connection piece are tightly connected together. The laser welding mode avoids forming larger welding spots, and reduces the space occupied by the matched connection structure.
(3) According to the structure of the power lithium battery, the internal space is effectively increased under the condition that the assembly and welding of the battery are not affected, and the capacity and the energy density of the battery are improved; especially when the width of the battery winding core is wider and the height of the battery core is shorter, the control of the space of the battery pack module can be facilitated.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present utility model;
FIG. 2a is a diagram showing a separation state of a mating connection structure according to a first embodiment of the present utility model;
FIG. 2b is a perspective view showing the mated connection structure of the first embodiment of the present utility model;
FIG. 2c is a front view showing the mating connection structure of the first embodiment of the present utility model;
FIG. 3a is a perspective view showing the coupling structure of the second embodiment of the present utility model;
FIG. 3b is a diagram illustrating a separation state of the mating connection structure according to the second embodiment of the present utility model;
FIG. 3c is a front view showing the mated connection structure of the second embodiment of the present utility model;
FIG. 4a is a perspective view showing the coupling structure of the third embodiment of the present utility model;
FIG. 4b is a diagram illustrating a separation state of the mating connection structure according to the third embodiment of the present utility model;
FIG. 4c is a front view showing the mated connection structure of the third embodiment of the present utility model;
FIG. 5a is a perspective view showing the structure of the fourth embodiment of the present utility model, which is connected together by a mating connection structure;
FIG. 5b is a diagram showing a separation state of the mating connection structure according to the fourth embodiment of the present utility model;
fig. 5c is a front view showing the mated connection structure of the fourth embodiment of the present utility model.
Reference numerals in the schematic drawings illustrate: 1. a cover plate; 10. a pole connection piece; 2. a positive electrode connecting sheet; 3. a negative electrode connecting sheet; 4. a battery winding core; 5. wrapping the winding core; 6. an aluminum shell; 21. a first splicing end; 22. a second splicing end; 23. clamping the long hole; 24. a clamping end; 25. a first overlap end; 26. a second overlap end; 27. a first curved socket end; 28. a second curved socket end; 201. and (5) laser welding.
Detailed Description
For a further understanding of the present utility model, the present utility model will be described in detail with reference to the drawings and examples.
Example 1
As shown in fig. 1, the power lithium battery structure in this embodiment includes a battery winding core 4, the battery winding core 4 is disposed in an aluminum case 6 with an opening at one end, a cover plate 1 is disposed on one side of the battery winding core 4, which is located at the opening of the aluminum case 6, and a positive electrode tab and a negative electrode tab of the battery winding core 4 are located at different sides of the cover plate 1. The two ends of the cover plate 1 are respectively provided with a positive pole post and a negative pole post, the positive pole lug and the positive pole post are connected through split type connecting sheets, and the negative pole lug and the negative pole post are connected through split type connecting sheets. The split type connecting piece comprises a lug connecting piece and a pole connecting piece 10, wherein the lug connecting piece comprises a positive electrode connecting piece 2 and a negative electrode connecting piece 3, and the positive electrode connecting piece 2 and the negative electrode connecting piece 3 are respectively connected with the pole connecting piece 10 through a matched connecting structure, so that the positive electrode lug is connected with the positive electrode pole in a conducting way, and the negative electrode lug is connected with the negative electrode pole in a conducting way. Wherein the side surfaces of the positive electrode connecting sheet 2 and the negative electrode connecting sheet 3, which are in contact with the aluminum shell 6, are coated with a winding core rubber coating 5.
As shown in fig. 2a, 2b, and 2c, the mating connection structure in this embodiment is a splice structure, where the splice structure includes a first splice end 21 located on the post connection tab 10, and a second splice end 22 located on the positive connection tab 2 and the negative connection tab 3. Specifically, the first splicing end 21 is an "L" shaped notch formed on the pole connecting piece 10, and the second splicing end 22 is an "L" shaped notch formed on the end surfaces of the positive electrode connecting piece 2 and the negative electrode connecting piece 3 connected with the cover plate 1 and matched with the first splicing end 21. The first and second splice ends 21, 22 are spliced together when the post connecting piece 10 is connected to the positive and negative connecting pieces 2, 3.
In order to strengthen the connection between the pole connection piece 10 and the positive connection piece 2 and the negative connection piece 3, at the mating connection structure of the two, the connection is fixed by laser welding, and a laser welding line 201 is formed, and the laser welding line 201 is positioned on the side surface of the mating connection structure, which is far from the battery winding core 4. Through laser welding's mode, can avoid forming great solder joint, reduce the space that cooperation connection structure occupy. The positive electrode connecting sheet 2 and the negative electrode connecting sheet 3 effectively increase the internal space without affecting the assembly and welding of the battery, and improve the capacity and the energy density of the battery; especially when the width of the battery winding core is wider and the height of the battery core is shorter, the control of the space of the battery pack module can be facilitated.
Example two
As shown in fig. 3a, 3b and 3c, the structure and arrangement of the battery winding core 4 in the present embodiment are the same as those in the first embodiment, and the mating connection structure in the present embodiment is a clamping structure, where the clamping structure includes a clamping end 24 located on the pole connection piece 10, and a clamping slot 23 located on the positive connection piece 2 and the negative connection piece 3. When the pole connection piece 10 is connected with the positive connection piece 2 and the negative connection piece 3, the clamping end 24 extends into the clamping long hole 23, so that the pole connection piece 10 is clamped with the positive connection piece 2 and the negative connection piece 3.
The clamping structure in this embodiment may also be another case in which the clamping structure includes a clamping long hole 23 on the pole connection piece 10 and a clamping end 24 on the positive and negative electrode connection pieces 2 and 3, and similarly, when the pole connection piece 10 is connected to the positive and negative electrode connection pieces 2 and 3, the clamping end 24 extends into the clamping long hole 23.
As in the first embodiment, in order to reinforce the connection between the pole connection piece 10 and the positive connection piece 2 and the negative connection piece 3, the connection is fixed by laser welding at the mating connection structure of the two.
Example III
As shown in fig. 4a, 4b and 4c, the structure and arrangement of the battery winding core 4 in this embodiment are the same as those in the first embodiment, and the mating connection structure in this embodiment is a lap joint structure, and the lap joint structure includes a first lap joint end 25 located on the pole connection piece 10, and a second lap joint end 26 located on the positive connection piece 2 and the negative connection piece 3. When the post connecting piece 10 is connected with the positive connecting piece 2 and the negative connecting piece 3, the first overlap end 25 and the second overlap end 26 overlap each other. As in the first embodiment, in order to reinforce the connection between the pole connection piece 10 and the positive connection piece 2 and the negative connection piece 3, the connection is fixed by laser welding at the mating connection structure of the two.
Example IV
As shown in fig. 5a, 5b, and 5c, the structure and arrangement of the battery winding core 4 in the present embodiment are the same as those in the first embodiment, the mating connection structure in the present embodiment is a socket structure, the socket structure includes a first curved socket end 27 located on the pole connection piece 10, and a second curved socket end 28 located on the positive electrode connection piece 2 and the negative electrode connection piece 3, and the first curved socket end 27 and the second curved socket end 28 are hook-shaped hooks that mate with each other. When the pole connection piece 10 is connected with the positive connection piece 2 and the negative connection piece 3, the first bending sleeve end 27 and the second bending sleeve end 28 are mutually sleeved. As in the first embodiment, in order to reinforce the connection between the pole connection piece 10 and the positive connection piece 2 and the negative connection piece 3, the connection is fixed by laser welding at the mating connection structure of the two.
Finally, it should be noted that, although the mating connection structure between the post connection piece 10 and the positive connection piece 2 and the negative connection piece 3 in the present utility model only includes a splicing structure, a clamping structure, a lapping structure, and a sleeving structure, other forms are included, which are not exhaustive.
The utility model and its embodiments have been described above by way of illustration and not limitation, and the utility model is illustrated in the accompanying drawings and described in the drawings in which the actual structure is not limited thereto. Therefore, if one of ordinary skill in the art is informed by this disclosure, the structural mode and the embodiments similar to the technical scheme are not creatively designed without departing from the gist of the present utility model.
Claims (10)
1. The utility model provides a power lithium battery structure, includes battery core (4), battery core (4) set up in one end open-ended aluminum hull (6), and battery core (4) are located aluminum hull (6) open-ended one side and set up apron (1), its characterized in that: the battery is rolled up anodal utmost point ear and negative pole utmost point ear and apron (1) of core (4) are located different sides, the both ends of apron (1) set up anodal utmost point post and negative pole utmost point post respectively, anodal utmost point ear and anodal utmost point post and negative pole utmost point ear and negative pole utmost point post all are connected through split type connection piece, split type connection piece includes utmost point ear connection piece and utmost point post connection piece (10), the utmost point ear connection piece includes anodal connection piece (2) and negative pole connection piece (3), anodal connection piece (2) and negative pole connection piece (3) are connected through cooperation connection structure with utmost point post connection piece (10) respectively.
2. The power lithium battery structure according to claim 1, wherein: the cooperation connection structure is mosaic structure, mosaic structure including being located first concatenation end (21) on utmost point post connection piece (10) to and be located second concatenation end (22) on anodal connection piece (2) and negative pole connection piece (3), first concatenation end (21) and second concatenation end (22) splice each other together.
3. The power lithium battery structure according to claim 1, wherein: the cooperation connection structure is the joint structure, the joint structure include joint end (24) that are located on utmost point post connection piece (10) to and be located joint slot hole (23) on anodal connection piece (2) and negative pole connection piece (3), joint end (24) stretch into in joint slot hole (23).
4. The power lithium battery structure according to claim 1, wherein: the cooperation connection structure is the joint structure, the joint structure include joint slot hole (23) that are located on utmost point post connection piece (10) to and be located joint end (24) on anodal connection piece (2) and negative pole connection piece (3), joint end (24) stretch into in joint slot hole (23).
5. The power lithium battery structure according to claim 1, wherein: the cooperation connection structure is overlap joint structure, overlap joint structure include first overlap joint end (25) that are located on utmost point post connection piece (10) to and be located second overlap joint end (26) on anodal connection piece (2) and negative pole connection piece (3), first overlap joint end (25) and second overlap joint end (26) overlap joint each other together.
6. The power lithium battery structure according to claim 1, wherein: the cooperation connection structure is the structure of cup jointing, the structure of cup jointing include the first crooked end (27) that cup joints that is located on utmost point post connection piece (10) to and the second crooked end (28) that cup joints that are located on anodal connection piece (2) and negative pole connection piece (3), first crooked end (27) cup joints with second crooked end (28) each other and cup joints together.
7. The power lithium battery structure according to claim 6, wherein: the tail ends of the first bending sleeving end (27) and the second bending sleeving end (28) are bent into hooks which are matched with each other.
8. A power lithium battery structure according to any one of claims 2-7, characterized in that: at the matched connection structure, the pole connection piece (10), the positive electrode connection piece (2) and the negative electrode connection piece (3) are fixed through laser welding, and a laser welding line (201) is formed.
9. The power lithium battery structure of claim 8, wherein: the laser welding seam (201) is positioned on the side surface of the matched connection structure, which is far away from the battery winding core (4).
10. The power lithium battery structure according to claim 9, wherein: the side surfaces of the positive electrode connecting sheet (2) and the negative electrode connecting sheet (3) which are in contact with the aluminum shell (6) are coated with a winding core rubber coating (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320265976.6U CN219163645U (en) | 2023-02-13 | 2023-02-13 | Power lithium battery structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320265976.6U CN219163645U (en) | 2023-02-13 | 2023-02-13 | Power lithium battery structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219163645U true CN219163645U (en) | 2023-06-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320265976.6U Active CN219163645U (en) | 2023-02-13 | 2023-02-13 | Power lithium battery structure |
Country Status (1)
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|---|---|
| CN (1) | CN219163645U (en) |
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- 2023-02-13 CN CN202320265976.6U patent/CN219163645U/en active Active
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