CN219498104U - Battery connecting piece, battery and power consumption device - Google Patents
Battery connecting piece, battery and power consumption device Download PDFInfo
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- CN219498104U CN219498104U CN202320196810.3U CN202320196810U CN219498104U CN 219498104 U CN219498104 U CN 219498104U CN 202320196810 U CN202320196810 U CN 202320196810U CN 219498104 U CN219498104 U CN 219498104U
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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 relates to a battery connecting piece, a battery and an electric device, wherein the battery connecting piece comprises a pole connecting area and a pole lug connecting area, one side of the pole lug connecting area is connected with the pole lug connecting area, and the edge of the pole lug connecting area is provided with a curled edge structure for preventing a pole lug from being scratched; according to the utility model, the edge of the tab connection area is flexibly bent through the hemming structure so as to be far away from the tab group; the curved surface area of the contact part between the lug connection area and the lug contact part is increased, the plane area is reduced, the defects of burrs, bulges and the like of a processing section are avoided, the lug is scratched in welding and use, and the lug is cracked, so that the heat productivity of the battery is reduced under the conditions that the battery connecting piece has overcurrent capability and welding function, and the safety performance and the service life of the battery are improved; the bent hemming structure does not need to improve the chamfering precision of the machined section, and reduces the machining difficulty and the production cost.
Description
Technical Field
The utility model relates to the technical field of batteries, in particular to a battery connecting sheet, a battery and an electric device.
Background
In the battery production and assembly process, a connecting sheet is generally arranged to connect the tab group and the pole, and the tab group and the pole bear overcurrent and fusing actions; the connecting sheet is processed and formed in a cold stamping mode through the die closing of the stamping die, so that mass production is realized, but a plurality of factors influencing the processing precision exist in the current stamping process, such as uneven clearance between a female die and a male die in the stamping die, die eccentricity or corner collapse of a cutting edge and the like, so that burrs appear on the shearing section of the edge of the connecting sheet.
The connecting sheet is connected with the tab group through ultrasonic welding, an oxide film of a surface to be welded is broken in an ultrasonic welding mode under high-frequency vibration and pressure environment, clean metal of the surface to be welded generates plastic flow and diffusion under the combined action of friction heat energy and ultrasonic softening, and then the clean metal is solidified to form reliable connection; therefore, if the burrs on the edge of the connecting sheet are more, the burrs are very easy to scratch the tab by the vibration environment in the welding process, and even the tab is cracked and inserted into the battery cell, so that the safety performance of the battery is affected; meanwhile, in use, the electric devices such as the electric automobile can generate vibration of different degrees, and the rough surface and burrs at the edge of the connecting sheet are easy to scratch the tab along with deformation of the battery pack, so that a large potential safety hazard exists.
Disclosure of Invention
Therefore, the technical problem to be solved by the utility model is to overcome the technical difficulty that burrs exist on the edge section and easily scratch the tab because the battery connecting sheet is limited by a processing mode in the prior art, and the battery connecting sheet, the battery and the power utilization device are provided with the curled edge structure to prevent the tab from being scratched, so that the safety performance is improved.
In order to solve the above technical problems, the present utility model provides a battery connecting sheet, which includes,
a post connection region;
the electrode lug connecting area, one side of electrode lug connecting area connect in the utmost point post connecting area, the edge of electrode lug connecting area is formed with the turn-up structure that prevents fish tail electrode lug.
In one embodiment of the present utility model, two surfaces in the thickness direction of the tab connection region are a first surface and a second surface, respectively, and the first surface is configured as a tab connection surface; the crimping structure bends from the first surface of the tab connection region to the second surface of the tab connection region.
In one embodiment of the utility model, the hemming structure comprises a connecting section and a bending section which are sequentially arranged, wherein the connecting section is connected with the edge of the tab connecting region, and the bending section bends from the first surface of the tab connecting region to the second surface of the tab connecting region.
In one embodiment of the utility model, the hemming structure comprises a connecting section, a bending section and a bending section which are sequentially arranged, wherein the connecting section is connected with the edge of the tab connecting region, the bending section bends from the first surface of the tab connecting region to the second surface direction of the tab connecting region, the bending section is connected with the tail end of the bending section, and the bending section extends to the center direction of the second surface.
In one embodiment of the utility model, the outer side surface of the connecting section is flush with the first surface, the inner side of the connecting section is provided with a collapse area, the bending-back section is accommodated in the collapse area, and the outer side surface of the bending-back section is flush with or lower than the second surface.
In one embodiment of the present utility model, two surfaces in the thickness direction of the tab connection region are a first surface and a second surface, respectively, and the first surface is configured as a tab connection surface; the curling structure bends from the second surface of the tab connection region to the first surface direction of the tab connection region, and the bending angle of the bending tail end of the curling structure relative to the extending direction of the edge of the tab connection region is more than or equal to 180 degrees.
In one embodiment of the utility model, the thickness of the battery connecting sheet is 0.3 mm-1.5 mm.
In one embodiment of the utility model, the hemming structure is integrally bent.
In a second aspect, the present utility model also provides a battery, comprising,
a top cover;
a housing; and is arranged in the shell
The battery cell and the battery connecting sheet described in the above embodiments; the electrode lug connection area is connected with the electrode lug group led out from the battery cell, and the electrode post connection area is connected with the electrode post on the top cover.
In a third aspect, the present utility model further provides an electric device, which includes the battery according to the above embodiment.
Compared with the prior art, the technical scheme of the utility model has the following advantages:
according to the battery connecting piece, the edge of the lug connecting area is provided with the hemming structure, so that the edge is flexibly bent to be far away from the lug group; the curved surface area of the contact part between the lug connection area and the lug contact part is increased, the plane area is reduced, the defects of burrs, bulges and the like of a shearing section left during processing are avoided, and the lug is scratched in welding and use, so that the lug is cracked, and the heat productivity of the battery is reduced under the conditions that the battery connection piece has overcurrent capability and welding function, and the safety performance and the service life of the battery are improved; the bent hemming structure does not need to improve the chamfering precision of the machined section, and reduces the machining difficulty and the production cost.
Drawings
In order that the utility model may be more readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings, in which:
fig. 1 is a schematic cross-sectional view of a battery tab a in accordance with a first embodiment of the utility model;
fig. 2 is a schematic structural view of a battery connecting piece b according to a first embodiment of the present utility model;
fig. 3 is a schematic cross-sectional view of the battery tab b shown in fig. 2;
fig. 4 is a schematic structural view of a battery connecting piece c according to a first embodiment of the present utility model;
fig. 5 is a schematic cross-sectional view of the battery tab c shown in fig. 4;
fig. 6 is a schematic cross-sectional view of a battery connecting sheet d in the first embodiment of the utility model;
fig. 7 is an assembled schematic view of a battery in a second embodiment of the utility model;
fig. 8 is an enlarged schematic view of the portion a shown in fig. 7.
Description of the specification reference numerals: 1. a post connection region; 2. a tab connection region; 21. a first surface; 22. a second surface; 3. a hemming structure; 31. a connection section; 32. bending sections; 33. a return bend section; 4. a collapse zone; 5. a battery cell; 6. and a tab group.
Detailed Description
The present utility model will be further described with reference to the accompanying drawings and specific examples, which are not intended to be limiting, so that those skilled in the art will better understand the utility model and practice it.
Example 1
Referring to fig. 1 to 6, the present utility model provides a battery connecting piece including a post connecting region 1 for connecting a post, and a tab connecting region 2 for connecting a tab; one side of the tab connection region 2 is connected to the tab connection region 1, and a curled edge structure 3 for preventing the tab from being scratched is formed at the edge of the tab connection region 2; the hemming structure 3 is integrally bent and formed, so that the hemming structure is better in physical property and stable in structure.
In one embodiment of the present utility model, specifically, referring to fig. 1, 3 and 5, two surfaces of the tab connection region 2 in the thickness direction are a first surface 21 and a second surface 22, respectively; wherein the first surface 21 is configured as a tab connection surface, and the second surface 22 is located on a back side of the tab connection surface; when the tab group 6 and the battery connecting piece are connected in a welding manner, the first surface 21 is a welding surface, the second surface 22 is a non-welding surface, and the curled structure 3 is bent from the first surface 21 of the tab connecting area 2 to the second surface 22. Of course, welding is only one of the connection modes of the tab, the pole and the battery connecting sheet, and other connection modes including gluing, riveting and the like are also suitable.
In one embodiment, referring to fig. 1, the hemming structure 3 includes a connecting section 31 and a bending section 32 sequentially arranged; the connecting section 31 is connected with the edge of the tab connection region 2, and the outer side surface of the connecting section 31 is connected with the first surface 21; the bending section 32 is connected to the end of the connecting section 31 in the extending direction, and the bending section 32 bends from the first surface 21 of the tab connection region 2 to the second surface 22 thereof, so that the main body of the curled structure 3 is located at the non-welding surface side. Specifically, when the battery connecting piece is welded to the tab, the tab surface is in contact with the first surface 21 and the outer side surface of the connecting section 31; further, when the tab generates a set variable or/and the tab length has redundancy, the contact area between the tab surface and the connection section 31 increases, and the tab surface may contact the bending section 32; because the bending section 32 is bent towards the non-welding surface side, the outer side surface of the bending section is of a curved surface structure, the periphery of the curved surface structure is smoother, and compared with the possibility of burrs generated on the end surface of a processed workpiece, the risk of scratching the tab is greatly reduced after bending; referring to fig. 1, the bending angle of the bending section 32 is 90 ° compared with the extending direction of the edge of the tab connection region 2, but the bending angle of the bending section 32 is not limited thereto, and when the bending section 32 bends, the edge of the workpiece can be bent in a direction away from the tab, so that the safety performance is improved, and meanwhile, the overcurrent capability and the welding function of the battery connection sheet are not affected.
In one embodiment, referring to fig. 2 to 5, the hemming structure 3 includes a connecting section 31, a bending section 32, and a bending section 33 sequentially disposed; the connecting section 31 is connected with the edge of the tab connection region 2, and the outer side surface of the connecting section 31 is connected with the first surface 21; the bending section 32 is connected with the tail end of the extending direction of the connecting section 31, and the bending section 32 bends from the first surface 21 of the tab connecting region 2 to the second surface 22 thereof; the bending section 33 is connected to the free end of the bending section 32 in the bending direction, and is connected to the end of the bending section 32, and the bending section 33 extends toward the center of the second surface 22. The main body of the hemming structure 3, especially the edge part of the end face is positioned at one side of the non-welding surface, when the battery connecting sheet and the tab are welded, the surface of the tab group is contacted with the outer side surface of the hemming structure 3 but not contacted with the tail end edge of the bending section 33, so that the tab is prevented from being scratched by the burrs of the end face of the machined workpiece. Further, in this embodiment, the bending section 33 is provided, so that on one hand, the hemming structure 3 forms an arch structure on the non-welding surface side, and the protruding vertex of the arch structure is assembled towards other battery structures, so that the bending end of the bending section 32 is prevented from directly contacting with the other battery structures, and the deformation of the battery connecting sheet caused by the unstable stress structure is avoided, and meanwhile, other structures are prevented from being scratched; on the other hand, the end of the hemming structure 3 is accommodated between the arch structure and the second surface 22 through the bending section 33, so that the space occupied by the hemming structure 3 in the thickness direction of the tab connection region 2 is reduced, and the space utilization rate of the battery is improved.
Further, in some embodiments, referring to fig. 2 and 3, the thickness of the plate body of the curled structure 3 is consistent with the thickness of the tab connection region 2, and after the curled structure 3 is bent, the surface of the curled structure 3 is formed to be convex in a non-welding surface, that is, the height of the outer surface of the curled structure 3 relative to the first surface 21 is greater than the height of the second surface 22 relative to the first surface 21; the bulge increases the curved surface area of the periphery of the hemming structure 3, so that the risk that the tab is scratched and cracked is effectively avoided. The uniform thickness of the hemming structure 3 can reduce the overall processing difficulty, and the thickness of the hemming structure 3 is not limited thereto in other designs. Further, the extending direction of the end of the bending section 33 may be parallel to the second surface 22, or the bending angle of the bending section 33 may be increased to enable the end of the bending section to be accommodated in the arch structure, so that the stress performance of the hemming structure 3 is better.
Further, in some embodiments, referring to fig. 4 and 5, the outer surface of the connecting section 31 is flush with the first surface 21, the inner side of the connecting section 31 is provided with a collapse zone 4, the bending back section 33 is accommodated in the collapse zone 4, and the outer surface of the bending back section 33 is flush with the second surface 22 or lower than the second surface 22; the hemming structure 3 is not provided with a bulge for the tab connection region 2, the thickness is not additionally increased, the thicknesses of the connection section 31, the bending section 32 and the bending section 33 can be flexibly controlled according to different materials, the overall thickness of the battery connection sheet is reduced, the internal space of the battery is saved, the battery capacity is increased, and the battery connection sheet can be fully connected with other battery structures.
In another embodiment of the present utility model, specifically, referring to fig. 6, two surfaces of the tab connection region 2 in the thickness direction are a first surface 21 and a second surface 22, respectively; wherein the first surface 21 is configured as a tab connection surface, and the second surface 22 is located on a back side of the tab connection surface; when the tab group 6 and the battery connecting sheet are connected in a welding manner, the first surface 21 is set as a welding surface, the second surface 22 is set as a non-welding surface, the curled structure 3 bends from the second surface 22 of the tab connecting area 2 to the first surface 21, and the main body of the curled structure 3 is positioned at one side of the welding surface and is arranged towards the battery cell 5 and the tab group 6; the welding surface of the tab group 6 is parallel to the first surface 21, so that a bending angle of a tangential direction of the bending end of the curled structure 3 relative to the extending direction of the edge of the tab connection region 2 is greater than or equal to 180 ° so that the end surface edge of the bending end of the curled structure 3 does not contact the tab group 6; when the bending angle is equal to 180 degrees, the outer side surface of the bending tail end of the curling structure 3 is arranged in parallel with the welding surface of the tab group 6, so that burrs on the end face are prevented from scratching the tab; when the bending angle is greater than 180 degrees, the hemming structure 3 is protruded on the first surface 21 to form an arch structure, the protruded periphery of the arch structure is a curved surface, the arch structure is in contact welding with the welding surface of the tab group 6, and the risk of tab cracking is reduced.
In the preferred design of the utility model, the thickness of the battery connecting sheet is 0.3 mm-1.5 mm; when the thickness of the battery connecting sheet is lower than 0.3mm, the battery connecting sheet is easy to deform when being connected with the tab group 6 and the pole, and the edge of the battery connecting sheet is tilted and uneven to directly influence the connection strength; when the thickness of the battery connecting sheet exceeds 1.5mm, the overall weight of the battery is increased and the energy density is reduced.
Example two
Referring to fig. 7 and 8, the present utility model further provides a battery, including a top cover, a housing, a battery cell 5 disposed in the housing, and a battery connecting piece in any of the above embodiments. The battery connecting piece is arranged between the top cover and the battery cell 5, the first surface 21 is arranged towards the battery cell 5, and the second surface 22 is arranged towards the top cover; the tab group 6 is led out from the battery cell 5 and is ultrasonically welded with the tab connection area 2; and the pole on the top cover and the pole connecting area 1 are subjected to laser welding.
In some embodiments, the hemming structure 3 is bent toward the tab group 6, and a bending angle of the bent end with respect to the extending direction of the edge of the tab connection region 2 is greater than or equal to 180 °, so that the edge of the end face of the bent end is not in contact with the tab group 6; in other embodiments, the curled structure 3 is bent away from the tab group 6, and the curved surface on the outer side of the curled structure contacts the tab group 6; the influence of burrs and machining defects generated by the tab connection area during welding on the tab group 6 is reduced, the heating value of the battery is controlled, the safety performance of the battery is improved, and the service life of the battery is prolonged.
Referring to fig. 2, 4 and 7, in some embodiments of the present utility model, the battery connecting piece is provided with two tab connection regions 2, the tab connection regions 2 are connected to the same side of the pole connection region 1 and are disposed opposite to each other, and an open slot is formed between the two tab connection regions 2 for avoiding the liquid injection port; the tab group 6 is led out from the battery core 5 and extends towards the direction of the open slot through the edge of one side of the tab connection area 2, which is far away from the open slot, so that the hemming structure 3 is preferably positioned on one side edge of the tab connection area 2, which is far away from the open slot, in order to avoid the contact of the cut section with the scratched tab; the avoiding structure for avoiding the liquid injection hole is not limited to an open slot, but also comprises other structures such as a round hole, a square hole and the like; meanwhile, according to the difference of the actual connection area between the tab group 6 and the tab connection region 2, the curled structure 3 may be disposed on all or part of the interval length of the side edge, and cover the connection area between the tab group 6 and the edge of the tab connection region 2, so that the tab group 6 is only in contact with the outer surface of the curled structure 3, but not in contact with the edge of the tab connection region 2.
Example III
The utility model also provides an electric device which comprises the battery in the embodiment. The battery is easy to vibrate in the operation and use of the power utilization device, the workpiece inside the battery is also easy to be in a fatigue state after repeated charge and discharge cycles, and the arrangement of the curling structure can effectively protect the lug structure, so that the service lives of the battery and the power utilization device are prolonged.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations and modifications of the present utility model will be apparent to those of ordinary skill in the art in light of the foregoing description. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the utility model.
Claims (10)
1. A battery connecting piece is characterized by comprising,
a post connection region;
the electrode lug connecting area, one side of electrode lug connecting area connect in the utmost point post connecting area, the edge of electrode lug connecting area is formed with the turn-up structure that prevents fish tail electrode lug.
2. The battery tab of claim 1 wherein: the two surfaces in the thickness direction of the tab connection region are a first surface and a second surface respectively, and the first surface is set as a tab connection surface; the crimping structure bends from the first surface of the tab connection region to the second surface of the tab connection region.
3. The battery tab of claim 2 wherein: the crimping structure comprises a connecting section and a bending section which are sequentially arranged, wherein the connecting section is connected with the edge of the tab connecting area, and the bending section bends towards the direction of the second surface of the tab connecting area from the first surface of the tab connecting area.
4. The battery tab of claim 2 wherein: the crimping structure comprises a connecting section, a bending section and a bending section which are sequentially arranged, wherein the connecting section is connected with the edge of the tab connecting area, the bending section bends towards the second surface direction of the tab connecting area, the bending section is connected with the tail end of the bending section, and the bending section extends towards the center direction of the second surface.
5. The battery tab of claim 4 wherein: the outside surface of linkage segment with first surface parallel and level, the inboard of linkage segment is equipped with the subsidence district, return bend section holding in the subsidence district, return bend section's outside surface with the second surface parallel and level or be less than the second surface.
6. The battery tab of claim 1 wherein: the two surfaces in the thickness direction of the tab connection region are a first surface and a second surface respectively, and the first surface is set as a tab connection surface; the curling structure bends from the second surface of the tab connection region to the first surface direction of the tab connection region, and the bending angle of the bending tail end of the curling structure relative to the extending direction of the edge of the tab connection region is more than or equal to 180 degrees.
7. The battery tab of claim 1 wherein: the thickness of the battery connecting sheet is 0.3 mm-1.5 mm.
8. The battery connecting piece according to any one of claims 1 to 7, wherein: the curling structure is integrally bent and formed.
9. A battery, characterized by comprising,
a top cover;
a housing; and is arranged in the shell
A battery cell and a battery tab according to any one of claims 1 to 8; the electrode lug connection area is connected with the electrode lug group led out from the battery cell, and the electrode post connection area is connected with the electrode post on the top cover.
10. An electrical device comprising the battery of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320196810.3U CN219498104U (en) | 2023-02-13 | 2023-02-13 | Battery connecting piece, battery and power consumption device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320196810.3U CN219498104U (en) | 2023-02-13 | 2023-02-13 | Battery connecting piece, battery and power consumption device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219498104U true CN219498104U (en) | 2023-08-08 |
Family
ID=87482209
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320196810.3U Active CN219498104U (en) | 2023-02-13 | 2023-02-13 | Battery connecting piece, battery and power consumption device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219498104U (en) |
-
2023
- 2023-02-13 CN CN202320196810.3U patent/CN219498104U/en active Active
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