CN219649087U - Positioning device for spot welding of square lithium battery shell - Google Patents
Positioning device for spot welding of square lithium battery shell Download PDFInfo
- Publication number
- CN219649087U CN219649087U CN202321216012.9U CN202321216012U CN219649087U CN 219649087 U CN219649087 U CN 219649087U CN 202321216012 U CN202321216012 U CN 202321216012U CN 219649087 U CN219649087 U CN 219649087U
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- plate
- lithium battery
- square lithium
- spot welding
- positioning device
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 41
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 41
- 238000003466 welding Methods 0.000 title claims abstract description 28
- 230000007246 mechanism Effects 0.000 claims abstract description 40
- 238000004880 explosion Methods 0.000 claims description 11
- 238000013022 venting Methods 0.000 claims description 11
- 230000003014 reinforcing effect Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 description 7
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 6
- 229910001416 lithium ion Inorganic materials 0.000 description 6
- 239000003792 electrolyte Substances 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- 238000005728 strengthening Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012545 processing 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
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- Sealing Battery Cases Or Jackets (AREA)
Abstract
The utility model discloses a positioning device for spot welding of a square lithium battery shell, which comprises a first plate, a second plate, a third plate, a bearing mechanism and a clamping force supply mechanism, wherein the first plate is arranged on the first plate; the second plate is fixedly connected to the first plate, the third plate is connected to the first plate in a sliding manner, and two pole abdication areas are formed in the third plate; the bearing mechanism is fixed on the first plate and used for supporting the cylinder in the square lithium battery shell; the clamping force supply mechanism acts on the third plate, so that the cylinder body and the cover plate which need to be welded in the square lithium battery shell are clamped in a clamping area formed between the second plate and the third plate. The device ensures the precision and reliability of the initial positioning of the cylinder body and the cover plate after spot welding, and provides powerful support for the subsequent process.
Description
Technical Field
The utility model belongs to the field of batteries, and particularly relates to a positioning device for spot welding of a square lithium battery shell.
Background
Square lithium batteries, which are one type of lithium ion battery, are widely used in various scenarios, such as photovoltaic energy storage systems, electric automobiles, and the like. The square lithium battery shell consists of a cover plate and a cylinder body, wherein the cover plate is divided into an upper cover plate and a lower cover plate. When manufacturing the square lithium battery, the upper cover plate and the lower cover plate are required to be welded at the two open ends of the cylinder respectively according to the manufacturing process flow. In order to ensure the reliability and the air tightness of the upper cover plate, the lower cover plate and the cylinder body after being welded, the upper cover plate, the lower cover plate and the cylinder body are required to be positioned in a spot welding mode before being fully welded, and how to ensure the spot welding precision is a technical problem which needs to be solved in the prior art.
Disclosure of Invention
The utility model provides a positioning device for spot welding of a square lithium battery shell, which effectively ensures the accuracy of spot welding in the spot welding process of a cover plate and a cylinder body during the manufacturing of the square lithium battery.
The specific technical scheme of the utility model is as follows:
a positioning device for spot welding of a square lithium battery shell comprises a first plate, a second plate, a third plate, a bearing mechanism and a clamping force supply mechanism;
the second plate is fixedly connected to the first plate, the third plate is connected to the first plate in a sliding manner, and two pole abdication areas are formed in the third plate;
the bearing mechanism is fixed on the first plate and used for supporting the cylinder in the square lithium battery shell;
the clamping force supply mechanism acts on the third plate, so that the cylinder body and the cover plate which need to be welded in the square lithium battery shell are clamped in a clamping area formed between the second plate and the third plate.
According to the utility model, the cylinder body and the cover plate which need to be spot-welded are clamped in the cylinder body through the second plate and the third plate, and then the cylinder body is supported by the supporting mechanism, so that the cylinder body is prevented from contacting with the first plate, the problem of initial positioning of spot welding is effectively solved, the precision and the reliability of initial positioning of the cylinder body and the cover plate after spot welding are ensured, and powerful support is provided for subsequent procedures.
Further, when the whole end face (the end face of the second plate close to the clamping area and the end face of the third plate close to the clamping area) is used for positioning the cylinder body and the cover plate, the requirement on the flatness of the end faces is high, and positioning parts are arranged on the end face of the second plate close to the clamping area and the end face of the third plate close to the clamping area.
Further, at least one of the second plate and the third plate is provided with an auxiliary positioning screw. Because the problem that the flatness is poor may exist at the open end of individual barrel and/or apron for when pressing from both sides tightly, still there is the gap between the location portion of apron and second plate or third plate, can't realize the location, influences spot welding effect, can realize the location to the apron through rotatory this auxiliary positioning screw.
Further, for some square lithium batteries with explosion venting mechanisms arranged on the upper cover plates, the third plate further comprises an explosion venting mechanism avoiding area arranged between the two pole avoiding areas.
Further, for square lithium ion batteries used in battery packs with shared electrolyte channels, a pipeline forming the shared electrolyte channels is arranged on the lower cover plate in the square lithium ion battery shell, in order to avoid the influence of the pipeline on the lower cover plate on clamping, a U-shaped notch matched with the pipeline on the lower cover plate is formed in the second plate, and the U-shaped notch is used for avoiding the pipeline.
Further, two grooves are formed in the second plate and symmetrically arranged relative to the U-shaped notch and used for avoiding the position of the mounting seat on the lower cover plate, and the clamping is prevented from being influenced.
Further, for the square lithium ion battery shell with the reinforcing ribs on the side wall of the barrel, the bearing mechanism comprises two fourth plates which are fixed on the first plate and are parallel to each other, and the top surfaces of the two fourth plates are respectively contacted with the reinforcing ribs on the side wall of the barrel in the square lithium ion battery shell, so that the barrel cannot incline in the horizontal direction while being supported.
Further, in order to improve the production efficiency and save the cost of the positioning device, the clamping force supply mechanism in the embodiment comprises a fixed seat and an air cylinder; the fixing base is installed on first plate, and the cylinder is installed on the fixing base, and the piston rod of cylinder is connected with the sliding plate.
Further, in order to prevent potential safety hazards caused by conducting positive and negative poles due to misoperation when the square lithium battery enters the clamping area, the third plate is designed to be an insulating piece.
Drawings
Fig. 1 is a schematic diagram of the positioning device provided in embodiment 1 in cooperation with a square lithium battery;
fig. 2 is a structural view of a second plate member in embodiment 1;
fig. 3 is a structural view of a third plate member in embodiment 1;
fig. 4 is a structural view of a third plate member in embodiment 2;
FIG. 5 is a schematic view of a square lithium battery case to be positioned in example 3;
fig. 6 is a schematic diagram of the positioning device provided in embodiment 3 in cooperation with a square lithium battery;
fig. 7 is a structural view of a second plate member in embodiment 3.
The reference numerals are as follows:
1-first plate, 2-second plate, 21-U-shaped notch, 22-groove, 3-third plate, 31-post abdication area, 32-explosion venting mechanism abdication area, 4-bearing mechanism, 5-clamping force supply mechanism, 51-fixing seat, 52-cylinder, 6-fourth plate, 7-positioning part, 8-auxiliary positioning screw, 9-shell, 91-upper cover plate, 92-lower cover plate, 921-pipeline, 922-first battery cell installation seat and 923-second battery cell installation seat.
Detailed Description
The technical solutions of the embodiments will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden, are within the scope of the present utility model based on the following examples.
Meanwhile, it should be noted that the positional or positional relationship indicated by the terms such as "upper, lower, inner and outer" and the like herein are based on the positional or positional relationship shown in the drawings, and are merely for convenience of description, and are not intended to indicate or imply that the apparatus or element to be referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the technical scheme. Furthermore, the terms "first, second, or third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The terms "mounted, connected, and coupled" should be construed broadly in this disclosure unless otherwise specifically indicated and defined, such as: can be fixedly connected, detachably connected or integrally connected: it may also be a mechanical connection, an electrical connection, or a direct connection, or may be indirectly connected through an intermediate medium, or may be a communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
Example 1
The positioning device provided by the embodiment is suitable for manufacturing a commercially available square lithium battery, wherein the housing comprises an upper cover plate, a lower cover plate and a cylinder; the cylinder body and the upper cover plate are fixed in a welding mode, and the lower cover plate and the cylinder body are integrally formed in an extrusion mode. That is, in the case of manufacturing a commercially available square lithium battery, only the upper cap plate is welded to the can.
As shown in fig. 1 to 3, the positioning device in the present embodiment includes a first plate 1, a second plate 2, a third plate 3, a holding mechanism 4, and a clamping force supply mechanism 5;
the first plate 1 is a horizontal bottom plate and can be mounted on a welding platform through screw connection or other auxiliary clamps;
the second plate 2 and the third plate 3 are two vertical plates, the second plate 2 is fixed on the first plate 1, the third plate 3 is connected to the first plate 1 in a sliding way, and two pole abdication areas 31 are formed on the third plate 3;
the bearing mechanism 4 is fixed on the first plate 1 and is used for supporting the cylinder in the square lithium battery shell;
the clamping force supply mechanism 5 acts on the third plate so that a cylinder body and a cover plate to be welded in the square lithium battery shell are clamped in a clamping area formed between the second plate 2 and the third plate 3;
the working principle of the positioning device is as follows: the cylinder is placed in the clamping area, the bearing mechanism supports the cylinder at the moment, the upper cover plate is placed on the end face, close to the clamping area, of the third plate, then the clamping force supply mechanism is used for applying thrust to the third plate, the cylinder and the upper cover plate are clamped in the clamping area, and finally spot welding of each side of the cylinder and the upper cover plate is sequentially carried out.
The sliding connection modes are various, and a commercially available linear guide rail pair can be arranged on the first plate 1, and the second plate 2 or the third plate 3 can be arranged on a sliding block of the linear guide rail pair; or the first plate 1 is provided with a chute, and the second plate 2 or the third plate 3 is provided with a protrusion matched with the chute; because the process has low requirements on sliding precision, the embodiment adopts a mode of matching the sliding groove and the protrusion as an implementation mode of sliding connection from the viewpoint of saving cost.
The bearing mechanism has various modes, and in the embodiment, the bearing mechanism can be a plurality of bulges arranged on the first plate, and the top surfaces of the bulges are contacted with the cylinder body to bear the cylinder body; the two fourth plates 6 can be detachably connected to the first plate 1, and the two fourth plates 6 are in contact with the cylinder to support the cylinder.
The manner in which the clamping force is supplied to the mechanism 5 is also a number of options: for example, the second plate 2 or the third plate 3 can be pushed by manpower to clamp the cylinder and the cover plate to be welded; or a manual press is adopted to push the second plate 2 or the third plate 3 to clamp the cylinder and the cover plate which need to be welded; or a cylinder is adopted to push the second plate 2 or the third plate 3 to clamp the cylinder body and the cover plate which need to be welded; in view of safety and labor saving, as shown in fig. 1, the clamping force supply mechanism 5 in this embodiment includes a fixing base 51 and an air cylinder 52; the fixing seat is installed on the first plate 51, the air cylinder 52 is installed on the fixing seat 51, and a piston rod of the air cylinder 52 is connected with the third plate 3.
As shown in fig. 3, the post abdication region 31 may be a through hole, a blind hole or a U-shaped groove, and only needs to be larger than the post in size, so as to avoid the contact between the post and the second plate in the clamping process.
If the end face, close to the clamping area, of the second plate 2 and the end face, close to the clamping area, of the third plate 3 are adopted to position the cylinder body and the upper cover plate, the overall flatness requirements of the two end faces are high, and in order to ensure the flatness of the whole end face, the whole end face needs to be machined, so that the machining quantity is high; otherwise, when the flatness is poor, the upper cover plate cannot be pressed on the third plate 3, or the bottom of the cylinder cannot be pressed on the second plate 2, in order to improve the positioning accuracy, as shown in fig. 2 and 3, in this embodiment, the positioning portions 7 are selectively disposed on the end face of the second plate 2 close to the clamping area and the end face of the third plate 3 close to the clamping area. The positioning portion 7 may be configured as a plurality of positioning projections provided on the end surface, or may be a ring of positioning ring stages provided on the end surface. The design reduces the processing amount of the positioning surface, and the positioning accuracy can be ensured.
In order to further avoid that after the cylinder and the upper cover plate are clamped, a part of the area of the upper cover plate cannot be compacted on the positioning part of the third plate 3, as shown in fig. 1, the embodiment further adds at least one auxiliary positioning screw 8 on the third plate 3 in the area corresponding to the positioning part, and the upper cover plate can be positioned by rotating the auxiliary positioning screw 8.
In order to avoid potential safety hazards caused by conducting positive and negative poles due to misoperation when square lithium batteries enter a clamping area, the third plate 3 is designed to be an insulating piece. The insulating member is designed in various ways:
1. the third plate 3 is made of plastic insulating material with higher strength.
2. The third plate member 3 is made of a metal material, and an insulating layer needs to be applied on the third plate member 3.
Example 2
The square lithium battery in this example was basically the same as in example 1, except that: the explosion venting mechanism is arranged at the upper cover plate of the square lithium battery, and the explosion venting mechanism is an explosion venting valve directly arranged on the upper cover plate, or an explosion venting valve or an explosion venting membrane is arranged in one branch pipe, so as shown in fig. 4, in this embodiment, the third plate 3 further comprises an explosion venting mechanism avoiding area 32 arranged on the upper cover plate. The relief mechanism relief area 32 can be a through hole, a blind hole or a U-shaped groove, and only the size is required to be larger than that of the pole, so that the contact between the pole and the second plate in the clamping process is avoided. Because the third plate is provided with the two pole yielding areas 31 and the explosion venting mechanism yielding areas 32, the third plate 3 is not deformed in the repeated clamping process in order to ensure the strength, and compared with the U-shaped groove, the through hole can be used as the optimal selection of the two yielding areas.
Example 3
In this embodiment, the square lithium ion battery is a cell structure proposed by chinese patent, publication No. CN 218525645U. In this patent, the large-capacity battery includes a battery cell group formed by connecting a plurality of battery cells (also called batteries or single batteries) in parallel, and is formed by splicing pipes on the respective battery cell cases.
The battery cell comprises a shell and a plurality of parallel commercial soft package batteries or a commercial square lithium battery which are arranged in the shell; as shown in fig. 5, the case 9 includes an upper cover plate 91, a lower cover plate 92, and a cylinder 93, the upper cover plate 91 is provided with a positive electrode column and a negative electrode column, and the lower cover plate 92 is provided with a pipe 921 for forming an electrolyte sharing passage; the lower cover plate 92 is further provided with a first battery cell mounting seat 922 along the thickness direction of the shell; the side wall of the cylinder is also provided with a second battery cell mounting seat 923 along the height direction of the shell.
When manufacturing the battery core, the upper cover plate and the cylinder body are welded firstly, then a plurality of parallel soft package batteries or square batteries are placed, and the lower cover plate and the cylinder body are welded. That is, in the present embodiment, the upper cover plate and the lower cover plate are welded to the cylinder body separately as compared with embodiment 1. Therefore, the positioning device in this embodiment also has the following differences from embodiment 1 or embodiment 2, as shown in fig. 6 and 7:
1. since the cylinder 93 and the upper and lower cover plates 91 and 92 are welded separately, it is preferable to provide auxiliary set screws 8 in both the second and third plates 2 and 3 to facilitate the positioning compensation of the two welding processes.
2. Because the barrel lateral wall is provided with second electric core mount pad 923, this second electric core mount pad 923 just is the strengthening rib in order to improve casing intensity to this strengthening rib and barrel are just with integrated into one piece's technology preparation, consequently utilize strengthening rib and supporting mechanism 4 cooperation, do benefit to the lift and the location of barrel more. Specifically, in this embodiment, the supporting mechanism 4 includes two fourth plates 41 fixed on the first plate 1 and parallel to each other, and top surfaces of the two fourth plates 41 are respectively contacted with the reinforcing ribs (i.e. the second cell mounting seats 923) of the side wall of the barrel in the square lithium battery case.
3. Be provided with U-shaped breach 21 on the second plate 2 for dodge the position of pipeline 921 on the lower cover plate 92, avoid the extrusion to receive the influence, be provided with two recesses 22 on the second plate 2 simultaneously, two recesses 22 set up for U-shaped breach symmetry, are used for dodging the position of first electric core mount pad 922 on the lower cover plate 92, avoid extrusion location to receive the influence.
Claims (10)
1. The positioning device for spot welding of the square lithium battery shell is characterized by comprising a first plate, a second plate, a third plate, a bearing mechanism and a clamping force supply mechanism;
the second plate is fixedly connected to the first plate, the third plate is connected to the first plate in a sliding manner, and two pole abdication areas are formed in the third plate;
the bearing mechanism is fixed on the first plate and used for supporting the cylinder in the square lithium battery shell;
the clamping force supply mechanism acts on the third plate, so that the cylinder body and the cover plate which need to be welded in the square lithium battery shell are clamped in a clamping area formed between the second plate and the third plate.
2. The positioning device for spot welding of a square lithium battery case according to claim 1, wherein the end face of the second plate member close to the clamping area and the end face of the third plate member close to the clamping area are provided with positioning portions at portions thereof.
3. The positioning device for spot welding of a square lithium battery case according to claim 2, wherein at least one of the second plate member and the third plate member is provided with an auxiliary positioning screw; the auxiliary positioning screw is arranged in the area where the positioning part is.
4. The positioning device for spot welding of a square lithium battery case according to claim 3, wherein the positioning portion is a plurality of positioning projections.
5. The positioning device for spot welding of a square lithium battery case according to any one of claims 1 to 4, wherein the third plate further comprises an explosion venting mechanism avoiding area provided between the two pole avoiding areas.
6. The positioning device for spot welding of a square lithium battery shell according to claim 5, wherein the second plate is provided with a U-shaped notch.
7. The positioning device for spot welding of a square lithium battery shell according to claim 4, wherein two grooves are formed in the second plate, and the two grooves are symmetrically arranged relative to the U-shaped notch.
8. The positioning device for spot welding of a square lithium battery shell according to claim 4, wherein the bearing mechanism comprises two fourth plates which are fixed on the first plate and are parallel to each other, and the top surfaces of the two fourth plates are respectively contacted with the reinforcing ribs of the side wall of the cylinder in the square lithium battery shell.
9. The positioning device for spot welding of a square lithium battery case according to claim 1, wherein the clamping force supply mechanism comprises a fixing base and an air cylinder; the fixing base is installed on first plate, and the cylinder is installed on the fixing base, and the piston rod of cylinder is connected with the third plate.
10. The positioning device for spot welding of a square lithium battery case according to claim 1, wherein the third plate is an insulating member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321216012.9U CN219649087U (en) | 2023-05-19 | 2023-05-19 | Positioning device for spot welding of square lithium battery shell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321216012.9U CN219649087U (en) | 2023-05-19 | 2023-05-19 | Positioning device for spot welding of square lithium battery shell |
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| Publication Number | Publication Date |
|---|---|
| CN219649087U true CN219649087U (en) | 2023-09-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321216012.9U Active CN219649087U (en) | 2023-05-19 | 2023-05-19 | Positioning device for spot welding of square lithium battery shell |
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| CN (1) | CN219649087U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117600699A (en) * | 2024-01-24 | 2024-02-27 | 宁德时代新能源科技股份有限公司 | Battery top cover welding system and battery top cover welding method |
-
2023
- 2023-05-19 CN CN202321216012.9U patent/CN219649087U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117600699A (en) * | 2024-01-24 | 2024-02-27 | 宁德时代新能源科技股份有限公司 | Battery top cover welding system and battery top cover welding method |
| CN117600699B (en) * | 2024-01-24 | 2024-06-07 | 宁德时代新能源科技股份有限公司 | Battery top cover welding system and battery top cover welding method |
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