CN117199725A - Copper bar assembly, high-frequency induction welding method of copper bar assembly and battery module - Google Patents
Copper bar assembly, high-frequency induction welding method of copper bar assembly and battery module Download PDFInfo
- Publication number
- CN117199725A CN117199725A CN202311253526.6A CN202311253526A CN117199725A CN 117199725 A CN117199725 A CN 117199725A CN 202311253526 A CN202311253526 A CN 202311253526A CN 117199725 A CN117199725 A CN 117199725A
- Authority
- CN
- China
- Prior art keywords
- copper bar
- welding
- bar assembly
- frequency induction
- connecting nut
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 103
- 239000010949 copper Substances 0.000 title claims abstract description 103
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 102
- 238000003466 welding Methods 0.000 title claims abstract description 85
- 230000006698 induction Effects 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims abstract description 20
- 229910000679 solder Inorganic materials 0.000 claims description 23
- 230000008878 coupling Effects 0.000 claims description 17
- 238000010168 coupling process Methods 0.000 claims description 17
- 238000005859 coupling reaction Methods 0.000 claims description 17
- 230000004907 flux Effects 0.000 claims description 7
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 5
- 229910052709 silver Inorganic materials 0.000 claims description 5
- 239000004332 silver Substances 0.000 claims description 5
- 230000000712 assembly Effects 0.000 claims 1
- 238000000429 assembly Methods 0.000 claims 1
- 238000005476 soldering Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Connection Of Batteries Or Terminals (AREA)
Abstract
The invention provides a copper bar assembly, a copper bar assembly high-frequency induction welding method and a battery module, and relates to the technical field of copper bar assembly connection. The copper bar assembly comprises copper bars, a connecting nut, a sleeve and a welding ring; the copper bar is provided with a connecting hole connected with a connecting nut, and the connecting nut is inserted into the connecting hole; the bottom of the connecting nut is provided with a limit flange, and the sleeve is sleeved on the connecting nut in a sliding way; and a welding ring is arranged between the limit flange and the copper bar and between the sleeve and the copper bar, the connecting nut, the sleeve and the ring are welded together through high-frequency induction welding. The technical effect of completely attaching the copper bar, the nut and the sleeve is achieved.
Description
Technical Field
The invention relates to the technical field of copper bar assembly connection, in particular to a copper bar assembly, a copper bar assembly high-frequency induction welding method and a battery module.
Background
The copper bar assembly is used as an output electrode and an input electrode in a new energy automobile battery module, and three parts of the copper bar assembly are as follows: the nut is connected with the battery; the sleeve is used as a conductive electrode connected with the battery; copper bars are used as the connection members to the whole module. The three parts are assembled and screwed by the external threads of the nut and the internal threads of the sleeve, so that the strength and the performance of the whole assembly (the general condition of industry) are ensured.
However, the copper bar assembly has a problem through threaded connection, and the threaded connection mode can lead to incomplete lamination between the copper bar and the nut or between the copper bar and the sleeve due to assembly errors, and a gap exists, so that the impedance value of the copper bar assembly is large.
Therefore, the copper bar assembly, the high-frequency induction welding method of the copper bar assembly and the battery module, which enable the copper bar, the nut and the sleeve to be completely attached, are important technical problems to be solved by those skilled in the art.
Disclosure of Invention
The invention aims to provide a copper bar assembly, a high-frequency induction welding method of the copper bar assembly and a battery module, so as to solve the technical problem that gaps exist among copper bars, nuts and sleeves in the prior art.
In a first aspect, an embodiment of the present invention provides a copper bar assembly, including a copper bar, a coupling nut, a sleeve, and a weld ring;
the copper bar is provided with a connecting hole connected with the connecting nut, and the connecting nut is inserted into the connecting hole;
the bottom of the connecting nut is provided with a limit flange, and the sleeve is sleeved on the connecting nut in a sliding way;
the welding rings are arranged between the limiting flange and the copper bar and between the sleeve and the copper bar, the connecting nut, the sleeve and the welding rings are welded together through high-frequency induction welding.
With reference to the first aspect, the embodiment of the present invention provides a possible implementation manner of the first aspect, wherein an inner wall of the connecting nut is provided with an internal thread, and an outer wall of the connecting nut is smooth.
With reference to the first aspect, the embodiment of the present invention provides a possible implementation manner of the first aspect, wherein a cross section of the connecting nut is circular.
With reference to the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, where the solder ring is a silver-based solder ring.
With reference to the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, where the solder ring is a copper-based solder ring.
In a second aspect, an embodiment of the present invention provides a battery module, including a battery, a circuit control member, and the copper bar assembly;
the battery is connected with the circuit control part through the copper bar assembly.
In a third aspect, an embodiment of the present invention provides a high-frequency induction welding method for a copper bar assembly, including the steps of:
a welding ring is sleeved on the connecting nut, and the connecting nut is inserted into a connecting hole on the copper bar;
sleeving a welding ring on the connecting nut, wherein the two welding rings are respectively positioned on the upper side and the lower side of the copper bar, and sleeving a sleeve on the connecting nut to form a preassembly piece;
and transferring the preassembled piece into an induction coil of the high-frequency induction welding, compacting the preassembled piece, and performing the high-frequency induction welding.
With reference to the third aspect, embodiments of the present invention provide a possible implementation manner of the third aspect, wherein the pre-assembly is subjected to a pressure of 5-100N during the high frequency induction welding.
With reference to the third aspect, the present embodiment provides a possible implementation manner of the third aspect, wherein the frequency of the high-frequency induction welding is between 8 and 250 KHZ.
With reference to the third aspect, an embodiment of the present invention provides a possible implementation manner of the third aspect, where the soldering ring is coated with a soldering flux.
The beneficial effects are that:
the invention provides a copper bar assembly, which comprises copper bars, a connecting nut, a sleeve and a welding ring, wherein the copper bars are arranged on the connecting nut; the copper bar is provided with a connecting hole connected with a connecting nut, and the connecting nut is inserted into the connecting hole; the bottom of the connecting nut is provided with a limit flange, and the sleeve is sleeved on the connecting nut in a sliding way; and a welding ring is arranged between the limit flange and the copper bar, the connecting nut, the sleeve and the welding ring are welded together through high-frequency induction welding.
Specifically, copper bar, coupling nut and sleeve three are in the same place through welding the ring welding, and welding process adopts high frequency induction welding, through such setting for need not to carry out threaded connection between coupling nut and the sleeve two, weld the ring and melt and can fill up the gap between copper bar, coupling nut and the sleeve three, can reduce the impedance value of coupling nut and copper bar junction, and then reduce the impedance value of copper bar subassembly. In addition, the copper bar, the connecting nut and the sleeve are welded together through high-frequency induction welding, so that the gaps among the copper bar, the connecting nut and the sleeve can be better filled with welding flux.
The invention provides a battery module, which comprises a battery, a circuit control piece and a copper bar assembly; the battery is connected with the circuit control part through the copper bar assembly. Compared with the prior art, the battery module has the advantages, and the details are not repeated here.
The invention provides a high-frequency induction welding method of a copper bar assembly, which comprises the following steps of: a welding ring is sleeved on the connecting nut, and the connecting nut is inserted into a connecting hole on the copper bar; sleeving a welding ring on the connecting nut, wherein the two welding rings are respectively positioned on the upper side and the lower side of the copper bar, and sleeving the sleeve on the connecting nut to form a preassembled piece; and transferring the preassembled piece into an induction coil of the high-frequency induction welding, compacting the preassembled piece, and performing the high-frequency induction welding. The copper bar assembly high frequency induction welding method has the advantages compared with the prior art, and is not repeated here.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a copper bar assembly according to an embodiment of the present invention.
Icon:
100-copper bar;
200-connecting nuts;
300-sleeve;
400-welding ring.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
The invention will now be described in further detail with reference to specific examples thereof in connection with the accompanying drawings.
Referring to fig. 1, the present embodiment provides a copper bar assembly including a copper bar 100, a coupling nut 200, a sleeve 300, and a weld ring 400; the copper bar 100 is provided with a connecting hole connected with the connecting nut 200, and the connecting nut 200 is inserted into the connecting hole; the bottom of the connecting nut 200 is provided with a limit flange, and the sleeve 300 is sleeved on the connecting nut 200 in a sliding manner; and a welding ring 400 is arranged between the limit flange and the copper bar 100 and between the sleeve 300 and the copper bar 100, the connecting nut 200, the sleeve 300 and the welding ring 400 are welded together through high-frequency induction welding.
Specifically, the copper bar 100, the connecting nut 200 and the sleeve 300 are welded together through the welding ring 400, and the welding process adopts high-frequency induction welding, so that the connecting nut 200 and the sleeve 300 do not need to be in threaded connection, the welding ring 400 is melted to fill gaps among the copper bar 100, the connecting nut 200 and the sleeve 300, the impedance value of the joint of the connecting nut 200 and the copper bar 100 can be reduced, and the impedance value of the copper bar assembly is further reduced. In addition, the copper bar 100, the connection nut 200 and the sleeve 300 are welded together by high-frequency induction welding, so that the gaps among the copper bar 100, the connection nut 200 and the sleeve 300 can be better filled with the welding flux.
Referring to fig. 1, in an alternative of the present embodiment, the inner wall of the coupling nut 200 has an internal thread, and the outer wall of the coupling nut 200 is smooth. The coupling nut 200 has a circular cross section.
Specifically, the inner wall of the coupling nut 200 has an internal thread to facilitate the coupling of the battery pack.
Wherein the cross section of the coupling nut 200 is arranged in a circular shape so that the coupling nut 200 is coupled with the sleeve 300 while facilitating the filling of the gap between the coupling nut 200 and the sleeve 300 with solder.
Among them, the solder ring 400 may employ a silver-based solder ring 400.
In addition, the solder ring 400 may employ a copper-based solder ring 400.
The embodiment provides a battery module, which comprises a battery, a circuit control piece and a copper bar assembly; the battery is connected with the circuit control part through the copper bar assembly.
Specifically, compared with the prior art, the battery module provided by the embodiment has the advantages of the copper bar assembly, and the description is omitted here.
The embodiment provides a high-frequency induction welding method of a copper bar assembly, which comprises the following steps of: a welding ring 400 is sleeved on the connecting nut 200, and the connecting nut 200 is inserted into a connecting hole on the copper bar 100; sleeving a welding ring 400 on the connecting nut 200, wherein the two welding rings 400 are respectively positioned on the upper side and the lower side of the copper bar 100, and sleeving the sleeve 300 on the connecting nut 200 to form a preassembly; and transferring the preassembled piece into an induction coil of the high-frequency induction welding, compacting the preassembled piece, and performing the high-frequency induction welding.
Specifically, the copper bar 100, the connecting nut 200 and the sleeve 300 are not in threaded connection, welding flux is filled in the joint of the copper bar 100, then high-frequency induction welding is carried out, a welding ring 400 is filled on a limit flange of the connecting nut 200, the copper bar 100 is assembled, the welding ring 400 is filled in the joint of the copper bar 100 and the connecting nut 200, finally the sleeve 300 is sleeved, the whole assembly is welded on a high-frequency induction welding machine, the position to be welded is located in an induction coil, and the welding flux is melted through induction heating, so that the three parts are welded together; the gap of the connecting method is filled with solder, the conductivity of the solder is good, and the impedance value of the welded assembly is lower.
In addition, the solder ring 400 can adopt a silver-based solder ring 400, and compared with solder paste, the solder ring 400 is easier to operate, the material utilization rate is high, the solder quantity is easier to control, and automation is easy to realize.
In addition, the solder composition of the solder ring 400 may be silver-based or copper-based. In addition, the soldering flux can be smeared on the soldering ring 400, so that the fluidity of the soldering ring 400 after melting is better, and the soldered seam is plumter.
It should be noted that the induction welding is performed by using the induction coil to perform induction heating on the parts, the induction coil is not contacted with the parts, the abrasion phenomenon of the induction coil can hardly occur (one induction coil can be used for 5-10 years), the output during welding is more stable, and the automation is easy to realize.
Wherein the frequency of the high-frequency induction welding is between 8 and 250 KHZ.
In an alternative to this embodiment, a pressure of 5-100N is applied to the pre-assembly during the high frequency induction welding process.
Specifically, the deformation of the parts after welding by adopting the high-frequency induction welding method of the copper bar assembly provided by the embodiment is smaller, and no great force is required to be applied in the welding process of the high-frequency induction welding, so that the deformation of the parts after welding of the copper bar 100 is small (between 0.01 and 0.03 mm). And the deformation of the copper bar 100 after welding is about 0.4mm by adopting a welding mode in the prior art.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced with equivalents; such modifications and substitutions do not depart from the spirit of the technical solutions according to the embodiments of the present invention.
Claims (10)
1. A copper bar assembly, comprising: copper bar (100), connecting nut (200), sleeve (300) and weld ring (400);
the copper bar (100) is provided with a connecting hole connected with the connecting nut (200), and the connecting nut (200) is inserted into the connecting hole;
a limit flange is arranged at the bottom of the connecting nut (200), and the sleeve (300) is sleeved on the connecting nut (200) in a sliding mode;
the welding device is characterized in that the welding rings (400) are arranged between the limiting flange and the copper bar (100) and between the sleeve (300) and the copper bar (100), the connecting nut (200), the sleeve (300) and the welding rings (400) are welded together through high-frequency induction welding.
2. Copper bar assembly according to claim 1, characterized in that the inner wall of the coupling nut (200) is provided with an internal thread, the outer wall of the coupling nut (200) being smooth.
3. Copper bar assembly according to claim 2, characterized in that the cross section of the coupling nut (200) is circular.
4. A copper bar assembly according to any of claims 1-3, wherein the solder ring (400) is a silver-based solder ring (400).
5. A copper bar assembly according to any of claims 1-3, wherein the solder ring (400) is a copper-based solder ring (400).
6. A battery module comprising a battery, a circuit control member, and the copper bar assembly of any one of claims 1-5;
the battery is connected with the circuit control part through the copper bar assembly.
7. The high-frequency induction welding method for the copper bar assembly is characterized by comprising the following steps of:
a welding ring (400) is sleeved on the connecting nut (200), and the connecting nut (200) is inserted into a connecting hole on the copper bar (100);
sleeving a welding ring (400) on the connecting nut (200), wherein the two welding rings (400) are respectively positioned on the upper side and the lower side of the copper bar (100), and sleeving the sleeve (300) on the connecting nut (200) to form a preassembly piece;
and transferring the preassembled piece into an induction coil of the high-frequency induction welding, compacting the preassembled piece, and performing the high-frequency induction welding.
8. The copper bar assembly high frequency induction welding method of claim 7, wherein a pressure of 5-100N is applied to the pre-assembly during the high frequency induction welding.
9. The method of high frequency induction welding of copper bar assemblies according to claim 7 wherein the frequency of the high frequency induction welding is between 8 and 250 KHZ.
10. The copper bar assembly high frequency induction welding method according to any of claims 7-9, characterized in that the solder ring (400) is coated with a flux.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311253526.6A CN117199725A (en) | 2023-09-26 | 2023-09-26 | Copper bar assembly, high-frequency induction welding method of copper bar assembly and battery module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311253526.6A CN117199725A (en) | 2023-09-26 | 2023-09-26 | Copper bar assembly, high-frequency induction welding method of copper bar assembly and battery module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117199725A true CN117199725A (en) | 2023-12-08 |
Family
ID=89005177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311253526.6A Pending CN117199725A (en) | 2023-09-26 | 2023-09-26 | Copper bar assembly, high-frequency induction welding method of copper bar assembly and battery module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117199725A (en) |
-
2023
- 2023-09-26 CN CN202311253526.6A patent/CN117199725A/en active Pending
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