CN212461964U - Connection structure and battery - Google Patents
Connection structure and battery Download PDFInfo
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- CN212461964U CN212461964U CN202021148923.9U CN202021148923U CN212461964U CN 212461964 U CN212461964 U CN 212461964U CN 202021148923 U CN202021148923 U CN 202021148923U CN 212461964 U CN212461964 U CN 212461964U
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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 connection structure and battery, connection structure includes: the pole component is provided with a first groove; the adapter plate is provided with a second groove used for being sunk into the first groove, and the second groove is provided with a first welding area used for welding and connecting the adapter plate and the pole assembly; and the insulating plug is used for sealing the second groove. During the use, the second recess sinks into first recess, realizes the location of switching piece, and switching piece emergence skew when preventing to weld. During welding, weld first welding region for switching piece and utmost point post subassembly link together, and through filling the insulating stopper to the second recess at last, can seal the welding slag that the welding produced in the second recess, be used for preventing that the welding slag on the first welding region from falling into inside the electric core. The embodiment of the utility model provides a pair of connection structure and battery compares in rubberizing tape or spreading water, and the operation increases simply, the cost is lower, and the security is higher.
Description
Technical Field
The utility model belongs to the technical field of power battery, especially, relate to a connection structure and battery.
Background
The automobile power lithium ion battery mainly comprises a square aluminum shell, a cylinder and a soft package. The square aluminum-shell battery is a mainstream product in the current market because the square aluminum-shell battery has strong plasticity and can be designed in a customized manner according to specific requirements. The square aluminum shell battery mainly comprises a naked electric core, a switching piece, a top cover assembly and an aluminum shell. In the battery assembling process, the pole lug of the naked electric core and the adapter plate are connected together in an ultrasonic welding mode, and then the adapter plate is connected to the top cover assembly in a laser welding mode. Welding spatters easily to generate in the laser welding process, and splashed metal particles (welding slag) fall into a welding area and easily fall into the battery cell, so that the safety and the service life of the battery cell are seriously threatened.
In the conventional technology, after the adapter plate is welded, an adhesive tape is pasted or glue is coated on a welding area to prevent welding slag on the welding area from falling into the battery core. However, this method has the following technical drawbacks:
the adhesive tape is easy to fall off due to vibration and soaking of electrolyte in the use process of the battery, so that potential safety hazards are generated;
the glue flow is difficult to control and the curing time is long in the product processing process, the manufacturing difficulty is high, and the cost is high.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a connection structure and battery adopts new technical means to prevent that welding slag from dropping inside electric core on the welding zone to overcome above-mentioned technical defect.
To achieve the purpose, the utility model adopts the following technical proposal:
in a first aspect, the present application provides a connection structure comprising:
the pole assembly is provided with a first groove;
the adapter plate is provided with a second groove used for being sunk into the first groove, and the second groove is provided with a first welding area used for welding and connecting the adapter plate and the pole assembly;
and the insulating plug is used for sealing the second groove.
Optionally, the shape of the weld on the first weld region is circular, spiral, or annular.
Optionally, the pole assembly includes:
the positive pole is provided with the first groove;
the negative pole column is provided with the first groove;
the adaptor piece includes:
the aluminum adapter plate is provided with a second groove corresponding to the positive post;
the copper adapter plate is provided with a second groove corresponding to the negative pole column.
Optionally, the surface of the first welding region is provided with a first embossed pattern for increasing the laser absorption rate.
Optionally, the insulating plug is in interference fit with the second groove.
Optionally, the insulating plug is an insulating rubber plug with elasticity.
Optionally, two sides of the second groove are respectively connected with a connecting edge, and the connecting edges are attached to the pole assembly;
the connecting edge is provided with a second welding area for welding and connecting the switching sheet and the pole assembly, and the surface of the second welding area is pasted with an adhesive tape or coated with glue.
Optionally, the shape of the weld on the second weld region is circular, spiral, or annular.
Optionally, the second welding zone is provided with a second embossed texture for increasing the adhesive force of the tape or glue.
Optionally, the glue is a hot melt adhesive, an AB adhesive or a UV adhesive.
In a second aspect, the present application provides a battery comprising a connection structure as described above.
Compared with the prior art, the embodiment of the utility model provides a following beneficial effect has:
during the use, the second recess sinks into first recess, realizes the location of switching piece, and switching piece emergence skew when preventing to weld. During welding, weld first welding region for switching piece and utmost point post subassembly link together, and through filling the insulating stopper to the second recess at last, can seal the welding slag that the welding produced in the second recess, be used for preventing that the welding slag on the first welding region from falling into inside the electric core. The embodiment of the utility model provides a pair of connection structure and battery compares in rubberizing tape or spreading water, and the operation increases simply, the cost is lower, and the security is higher.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
The structure, ratio, size and the like shown in the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by people familiar with the technology, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention has no technical essential significance, and any structure modification, ratio relationship change or size adjustment should still fall within the range which can be covered by the technical content disclosed by the present invention without affecting the efficacy and the achievable purpose of the present invention.
Fig. 1 is a block diagram of a top cover assembly according to an embodiment of the present invention;
fig. 2 is a structural diagram of an interposer provided in an embodiment of the present invention;
fig. 3 is a structural diagram of a connection structure provided in an embodiment of the present invention;
fig. 4 is a structural diagram of an insulation plug according to an embodiment of the present invention;
fig. 5 is another structural diagram of a connection structure according to an embodiment of the present invention;
fig. 6 is a top view of a connection structure provided in an embodiment of the present invention;
fig. 7 is a structural diagram of three welding shapes provided by the embodiment of the present invention.
Illustration of the drawings:
the top cover assembly 100, the positive pole 101, the liquid injection hole 102, the explosion-proof valve 103, the negative pole 104 and the first groove 1011;
the interposer 200, the second groove 201, the first welding area 2011, the connecting edge 202 and the second welding area 2021;
an insulating plug 300;
and (5) glue 400.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the embodiments of the present invention are clearly and completely described with reference to the drawings in the embodiments of the present invention, and obviously, the embodiments described below are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1, the present application provides a cap assembly 100, including: the positive pole 101, the liquid injection hole 102, the explosion-proof valve 103, the negative pole 104, and the positive pole 101 and the negative pole 104 are respectively provided with a first groove 1011.
Referring to fig. 2, the interposer 200 provided in the present application includes a second groove 201 and a connecting edge 202 connecting two edges of the second groove 201. The adaptor sheet 200 is divided into a copper adaptor sheet and an aluminum adaptor sheet which have the same structure and different materials, wherein the aluminum adaptor sheet corresponds to the positive pole column 101, and the copper adaptor sheet corresponds to the negative pole column 104.
The first groove 1011 is provided with a first welding area 2011, and the connecting edge 202 is provided with a second welding area 2021.
During assembly, the second groove 201 of the interposer 200 is recessed into the first groove 1011. The interposer 200 and the cap assembly 100 are connected by laser welding, and according to the requirement of the battery product, welding can be performed only in the first welding area 2011 or the second welding area 2021, or welding can be performed in both of the two areas.
Example one
Referring to fig. 1 to 7, in the connection structure provided in this embodiment, the adaptor sheet 200 and the cap assembly 100 are welded together by geometric welding, an emitting head of the laser welding is a galvanometer or a swinging head, the swinging welding is performed only in the first welding area 2011, and the welding shape is circular, spiral line or annular, as shown in fig. 7. The main purpose of welding the spiral line shape and the ring shape is to increase the welding area and improve the overcurrent capacity.
After welding, dust is collected at the welding position, and then the second groove 201 is filled with an insulating plug 300 to prevent welding slag from falling into the battery core. The insulating plug 300 may be an insulating rubber plug having elasticity, such as an insulating rubber plug filled with silicone rubber or rubber. Specifically, the diameter of the insulating plug 300 is larger than that of the second groove 201, so that the insulating plug 300 is in interference fit with the second groove 201 to seal the welding slag in the second groove 201.
In the connection structure provided by the embodiment, when the connection structure is used, the second groove 201 sinks into the first groove 1011, so that the adapter sheet 200 is positioned, and the adapter sheet 200 is prevented from deviating during welding. During welding, weld first welding region 2011 for adaptor plate 200 links together with top cap assembly 100, and finally through filling insulating plug 300 to second recess 201, can seal the welding slag that the welding produced in second recess 201, and it falls into inside the electric core to be used for preventing the welding slag on first welding region 2011. The embodiment of the utility model provides a pair of connection structure compares in rubberizing tape or spreading water, and the operation increases simply, the cost is lower, and the security is higher.
Further, in this embodiment, a first embossed pattern for increasing the laser absorption rate may be optionally provided on the sidewall of the second groove 201. The first embossing lines have embossing shapes such as micro-protrusions and micro-recesses, and the laser absorption rate during laser welding can be increased.
Example two
In the connection structure provided by this embodiment, the interposer 200 and the top cover assembly 100 are welded together by geometric welding, an ejection head of the laser welding is a galvanometer, a swing head or a collimation head, the swing welding is performed only in the second welding region 2021, and the welding shape is circular, spiral or annular, as shown in fig. 7. The main purpose of welding the spiral line shape and the ring shape is to increase the welding area and improve the overcurrent capacity.
After welding, dust is collected at the welding position, and then glue 400 is applied to the welding position to prevent welding slag from falling into the battery core. The glue 400 is hot melt adhesive, AB glue or UV glue. When the hot melt adhesive is used, the thickness of the hot melt adhesive is 0.1-3 mm.
In the connection structure provided by this embodiment, the second groove 201 sinks into the first groove 1011, so as to position the interposer 200 and prevent the interposer 200 from deviating during welding. During welding, the second welding area 2021 is welded, so that the interposer 200 and the top cover assembly 100 are connected together, and finally, the welding position is coated with glue 400 or pasted with an adhesive tape, so that welding slag on the second welding area 2021 can be prevented from falling into the interior of the battery cell.
Further, in this embodiment, a second embossed pattern for increasing the adhesion of the glue 400 or the adhesive tape may be optionally provided on the surface of the second welding region 2021. The second embossing lines have embossing shapes such as micro-protrusions and micro-recesses, and the bonding force can be increased when the glue 400 is coated or the tape is pasted.
EXAMPLE III
On the basis of the first embodiment and the second embodiment, in the connection structure provided by this embodiment, the interposer 200 and the top cover assembly 100 are welded together by geometric welding, an ejection head of laser welding is a galvanometer or a swinging head, swinging welding is performed in both the first welding area 2011 and the second welding area 2021, and the welding shape is circular, spiral line or annular, as shown in fig. 7. The main purpose of welding the spiral line shape and the ring shape is to increase the welding area and improve the overcurrent capacity.
After welding, dust is collected at the welding position of the first welding area 2011, and then the second groove 201 is filled with the insulating plug 300 to prevent welding slag from falling into the battery core. The insulating plug 300 may be an insulating rubber plug having elasticity, such as an insulating rubber plug filled with silicone rubber or rubber. Specifically, the diameter of the insulating plug 300 is larger than that of the second groove 201, so that the insulating plug 300 is in interference fit with the second groove 201 to seal the welding slag in the second groove 201.
After the welding is completed, dust is also sucked at the welding position of the second welding area 2021, and then glue 400 is applied to the welding position to prevent welding slag from falling into the battery core. The glue 400 is hot melt adhesive, AB glue or UV glue. When the hot melt adhesive is used, the thickness of the hot melt adhesive is 0.1-3 mm.
In the connection structure provided by the embodiment, when the connection structure is used, the second groove 201 sinks into the first groove 1011, so that the adapter sheet 200 is positioned, and the adapter sheet 200 is prevented from deviating during welding. During welding, the first welding area 2011 and the second welding area 2021 are welded, so that the adapter sheet 200 and the top cover assembly 100 are connected together, and finally, the second groove 201 is filled with the insulating plug 300, so that welding slag generated by welding can be sealed in the second groove 201, and the welding slag on the first welding area 2011 is prevented from falling into the battery cell. The glue 400 or the tape is applied to the welding position of the second welding region 2021, so that welding slag on the second welding region 2021 can be prevented from falling into the interior of the battery cell.
Further, in this embodiment, a first embossed pattern for increasing the laser absorption rate may be optionally provided on the sidewall of the second groove 201. The first embossing lines have embossing shapes such as micro-protrusions and micro-recesses, and the laser absorption rate during laser welding can be increased.
Further, in this embodiment, a second embossed pattern for increasing the adhesion of the glue 400 or the adhesive tape may be optionally provided on the surface of the second welding region 2021. The second embossing lines have embossing shapes such as micro-protrusions and micro-recesses, and the bonding force can be increased when the glue 400 is coated or the tape is pasted.
Example four
The present embodiment provides a battery including the connection structure as described above. In particular, the battery may be a power lithium ion battery.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. A connecting structure, characterized by comprising:
the pole assembly is provided with a first groove;
the adapter plate is provided with a second groove used for being sunk into the first groove, and the second groove is provided with a first welding area used for welding and connecting the adapter plate and the pole assembly;
and the insulating plug is used for sealing the second groove.
2. The connection structure according to claim 1, wherein:
the welding shape on the first welding area is circular, spiral line or annular.
3. The connection structure according to claim 1, wherein:
the utmost point post subassembly includes:
the positive pole is provided with the first groove;
the negative pole column is provided with the first groove;
the adaptor piece includes:
the aluminum adapter plate is provided with a second groove corresponding to the positive post;
the copper adapter plate is provided with a second groove corresponding to the negative pole column.
4. The connection structure according to claim 1, wherein:
the surface of the first welding area is provided with first embossed grains for increasing the laser absorption rate.
5. The connection structure according to claim 1, wherein:
the insulating plug is in interference fit with the second groove.
6. The connection structure according to claim 1, wherein:
the insulating plug is an elastic insulating rubber plug.
7. The connection structure according to any one of claims 1 to 6, wherein:
two sides of the second groove are respectively connected with a connecting edge, and the connecting edges are attached to the pole assemblies;
the connecting edge is provided with a second welding area for welding and connecting the switching sheet and the pole assembly, and the surface of the second welding area is pasted with an adhesive tape or coated with glue.
8. The connection structure according to claim 7, wherein:
the welding shape on the second welding area is circular, spiral line or annular.
9. The connection structure according to claim 7, wherein:
and the second welding area is provided with second stamping lines for increasing the adhesive force of the adhesive tape or the glue.
10. A battery comprising the connection structure according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021148923.9U CN212461964U (en) | 2020-06-19 | 2020-06-19 | Connection structure and battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021148923.9U CN212461964U (en) | 2020-06-19 | 2020-06-19 | Connection structure and battery |
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| Publication Number | Publication Date |
|---|---|
| CN212461964U true CN212461964U (en) | 2021-02-02 |
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| CN202021148923.9U Active CN212461964U (en) | 2020-06-19 | 2020-06-19 | Connection structure and battery |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115621666A (en) * | 2022-11-07 | 2023-01-17 | 哈尔滨理工大学 | Battery connection structure and battery module based on grafting conducting strip |
| EP4228081A1 (en) * | 2022-02-14 | 2023-08-16 | Prime Planet Energy & Solutions, Inc. | Battery and battery manufacturing method |
-
2020
- 2020-06-19 CN CN202021148923.9U patent/CN212461964U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4228081A1 (en) * | 2022-02-14 | 2023-08-16 | Prime Planet Energy & Solutions, Inc. | Battery and battery manufacturing method |
| CN115621666A (en) * | 2022-11-07 | 2023-01-17 | 哈尔滨理工大学 | Battery connection structure and battery module based on grafting conducting strip |
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| TR01 | Transfer of patent right |
Effective date of registration: 20220126 Address after: 215500 room 808, No. 1, Southeast Avenue, Changshu high tech Industrial Development Zone, Changshu, Suzhou, Jiangsu Patentee after: Jiangsu Zhengli new energy battery technology Co.,Ltd. Address before: 523795 No.9 Jiayuan Road, Xiangshan Industrial Park, songmushan village, Dalang Town, Dongguan City, Guangdong Province Patentee before: DONGGUAN TAFEL NEW ENERGY TECHNOLOGY Co.,Ltd. Patentee before: JIANGSU TAFEL NEW ENERGY TECHNOLOGY Co.,Ltd. Patentee before: Jiangsu Tafel Power System Co.,Ltd. |