CN220178547U - Square shell battery core final welding fixture - Google Patents
Square shell battery core final welding fixture Download PDFInfo
- Publication number
- CN220178547U CN220178547U CN202321651820.8U CN202321651820U CN220178547U CN 220178547 U CN220178547 U CN 220178547U CN 202321651820 U CN202321651820 U CN 202321651820U CN 220178547 U CN220178547 U CN 220178547U
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- China
- Prior art keywords
- battery cell
- welding
- positioning
- square
- plate
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- 238000003466 welding Methods 0.000 title claims abstract description 81
- 210000004027 cell Anatomy 0.000 claims abstract description 57
- 210000005056 cell body Anatomy 0.000 claims abstract description 50
- 238000003825 pressing Methods 0.000 claims abstract description 18
- 230000007246 mechanism Effects 0.000 claims abstract description 16
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 125000006850 spacer group Chemical group 0.000 claims 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 239000011889 copper foil Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229920003225 polyurethane elastomer Polymers 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 230000004308 accommodation Effects 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000005030 aluminium foil Substances 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
Landscapes
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The utility model belongs to the technical field of battery cell welding, and particularly relates to a square shell cell final welding fixture which comprises a base, a positioning plate and a pressing plate, wherein two accommodating grooves are formed in the base, cell bodies are respectively installed, and the positioning plate is installed between the two accommodating grooves and used for positioning pole pieces of the two cell bodies; the end parts of the two accommodating grooves are respectively connected with an adjusting mechanism, and the adjusting mechanisms penetrate through one side of the accommodating groove and are used for being abutted against the side wall of the battery cell body; the accommodating groove is connected with a pressing plate and used for pressing the upper surface of the battery cell body; according to the utility model, the regulating mechanism provides constraint force for the battery cell body, so that accurate positioning of the battery cell body is realized, and the battery cell body is connected with the positioning plate to form a welding position for welding the battery cell pole piece by the ultrasonic welding device.
Description
Technical Field
The utility model belongs to the technical field of battery cell welding, and particularly relates to a final welding fixture for a square shell cell.
Background
Along with the rapid development and application of electric automobiles and the increasing worldwide requirements on energy conservation and environmental protection, the requirements on the battery cell assembly of the key component automobile in the electric automobile industry are also increasing. At present, along with the improvement of management and control of quality systems by battery cell manufacturers, under the condition that the production requirements of battery cells are higher and higher. In general, when a battery cell is welded, at least two procedures of pre-welding and final welding are needed, a plurality of layers of aluminum foil tabs and a plurality of layers of copper foil tabs of a single cell are welded together respectively through pre-welding to form a positive pole piece and a negative pole piece, and the positive pole pieces and the negative pole pieces of a plurality of cells are welded and formed respectively through final welding and connected in series, and then packaged into a battery shell to form a lithium battery.
When the pole pieces of the battery cells are subjected to final welding connection, the battery cells are correspondingly placed in a final welding fixture, and the pairing and final welding of the pole pieces of the battery cells are completed through the positive electrode ultrasonic welding device and the negative electrode ultrasonic welding device. In the prior art, because the final welding fixture is positioned inaccurately, poor welding phenomena such as cold joint, penetration welding, insufficient welding strength and the like are easy to occur at the welding position in the welding process of the positive pole piece and the negative pole piece of the battery cell. Based on this, there is a need to improve the drawbacks of the prior art to overcome the deficiencies in practical use.
Disclosure of Invention
In view of the foregoing drawbacks and deficiencies of the prior art, it is an object of the present utility model to at least solve one or more of the above-mentioned problems of the prior art, in other words, to provide a square-case cell end welding fixture that meets one or more of the above-mentioned needs.
In order to achieve the aim of the utility model, the utility model adopts the following technical scheme:
the utility model provides a square shell battery cell final welding fixture which comprises a base, a positioning plate and a pressing plate, wherein two accommodating grooves are formed in the base, battery cell bodies are respectively arranged on the base, and the positioning plate is arranged between the two accommodating grooves and used for positioning pole pieces of the two battery cell bodies; the end parts of the two accommodating grooves are respectively connected with an adjusting mechanism, and the adjusting mechanisms penetrate through one side of the accommodating groove and are used for being abutted against the side wall of the battery cell body; and the holding groove is connected with a pressing plate and used for pressing the upper surface of the battery cell body.
As a preferable scheme, each battery cell body comprises a positive electrode plate and a negative electrode plate, the positive electrode plates and the negative electrode plates of the two battery cell bodies are respectively and correspondingly abutted, and the positive electrode plates and the negative electrode plates are respectively arranged on the positive electrode connecting sheet and the negative electrode connecting sheet.
Preferably, a certain distance is arranged between the bottom surface of the battery cell body and the bottom surface of the positive electrode plate and/or the bottom surface of the negative electrode plate.
Preferably, the positioning plate is provided with a plurality of welding grooves, the plurality of welding grooves are respectively arranged corresponding to the positive pole piece and/or the negative pole piece, and welding positions are formed between the welding grooves and the positive pole piece and/or the negative pole piece.
As a preferable scheme, the base is provided with a positioning groove, the positioning groove is arranged between the two accommodating grooves, and the positioning plate is fastened with the positioning groove, so that the positioning plate is used for positioning the pole piece of the battery cell body.
As a preferable scheme, the adjusting mechanism comprises a handle, a positioning shaft, an elastic piece, a limiting block and a contact block, wherein the contact block and the limiting block are respectively positioned at the inner side and the outer side of the accommodating groove, the positioning shaft is connected between the contact block and the limiting block, the positioning shaft penetrates through the accommodating groove, the elastic piece is arranged on the positioning shaft in a penetrating manner, and the elastic piece is arranged between the accommodating groove and the contact block; and a handle is arranged on the limiting block, and the handle is adjusted to link the contact block to abut against or separate from the battery cell.
Preferably, the pressing plate is detachably connected with the base.
Preferably, a gasket is installed between the bottom surface of the battery cell body and the surface of the accommodating groove.
Preferably, the battery cell body is of a square structure.
Preferably, handles are respectively arranged on two sides of the base.
Compared with the prior art, the utility model has the beneficial effects that:
the utility model provides a final welding fixture for a square shell battery cell, which is characterized in that a restraining force is provided for a battery cell body through an adjusting mechanism, so that the accurate positioning of the battery cell body is realized, and a welding position is formed by connecting a positioning plate with the battery cell body for welding a battery cell pole piece by an ultrasonic welding device.
The utility model provides a final welding fixture for a square-shell battery cell, which can play a dust-proof effect on a battery cell body in a containing groove through a pressing plate so as to prevent aluminum foil or copper foil scraps from entering the surface of the battery cell body when battery cell tabs are welded, and is beneficial to ensuring the neatness of the battery cell when the battery cell is packaged.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other embodiments of the drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a square-case battery cell final welding fixture according to an embodiment of the present utility model;
fig. 2 is an exploded view of a square-case cell pre-welding jig according to an embodiment of the present utility model;
fig. 3 is a front view of a square-case cell pre-welding fixture according to an embodiment of the present utility model;
fig. 4 is a top view of a square-shell cell pre-welding fixture according to an embodiment of the present utility model;
FIG. 5 is a schematic view of a positioning plate according to an embodiment of the present utility model;
fig. 6 is a schematic structural diagram of a square-shell cell after welding according to an embodiment of the present utility model;
FIG. 7 is a schematic view of the structure of an adjustment mechanism according to an embodiment of the present utility model;
in the figure: 1 a base, 11 a containing groove, 12 an adjusting mechanism, 121 a handle, 122 a positioning shaft, 123 an elastic piece, 124 a limiting block, 125 a contact block, 13 a positioning groove, 14 a handle, 2 a positioning plate, 21 a welding groove, 3 a pressing plate, 4 a battery cell body, 41 a positive pole piece, 42 a negative pole piece, 51 a positive pole connecting piece, 52 a negative pole connecting piece and 53 a welding position.
Detailed Description
In order to more clearly illustrate the embodiments of the present utility model, specific embodiments of the present utility model will be described below with reference to the accompanying drawings. It is evident that the drawings in the following description are only examples of the utility model, from which other drawings and other embodiments can be obtained by a person skilled in the art without inventive effort.
In the description of the embodiments of the present utility model, the terms "upper", "lower", "left", "right", etc., are used for convenience of description and simplicity of operation only, and do not denote or imply that the apparatus or elements in question must have a particular orientation, be constructed and operate in a particular orientation, based on the orientation or positional relationship shown in the drawings.
As shown in fig. 1 to 7, the embodiment provides a final welding fixture for a square-shell battery cell, which comprises a base 1, a positioning plate 2 and a pressing plate 3, wherein two accommodating grooves 11 are formed in the base 1, battery cell bodies 4 are respectively installed, and the positioning plate 2 is installed between the two accommodating grooves 11 and used for positioning pole pieces of the two battery cell bodies 4; the end parts of the two accommodating grooves 11 are respectively connected with an adjusting mechanism 12, and the adjusting mechanism 12 penetrates through one side of the accommodating groove 11 and is used for abutting against the side wall of the battery cell body 4; the pressing plate 3 is connected above the accommodating groove 11 and is used for pressing the upper surface of the cell body 4.
Specifically, according to some embodiments of the present utility model, two receiving grooves 11 are configured on the base 1, the two receiving grooves 11 are arranged in a central symmetry manner, and two cell bodies 4 can be simultaneously installed in the two receiving grooves 11, and the two cell bodies are formed by ultrasonic welding.
Further, each cell body 4 includes a positive electrode piece 41 and a negative electrode piece 42, the positive electrode pieces 41 of the two cell bodies 4 are abutted, meanwhile, the negative electrode pieces 42 are abutted, the positive electrode pieces 41 and the negative electrode pieces 42 are respectively arranged on the positive electrode connecting piece 51 and the negative electrode connecting piece 52, and the positive electrode pieces 41 and the positive electrode connecting piece 51 and the negative electrode pieces 42 and the negative electrode connecting piece 52 are respectively welded and formed through an ultrasonic welding device.
Correspondingly, the positioning plate 2 is provided with a plurality of welding grooves 21, the plurality of welding grooves 21 are respectively abutted against the positive pole piece 41 and/or the negative pole piece 42, welding positions 53 are formed between the welding grooves 21 and the positive pole piece 41 and/or the negative pole piece 42, four welding grooves 21 are arranged in the embodiment, welding positions 53 are respectively formed between the four welding grooves 21 and the two positive pole pieces 41 and the two negative pole pieces 42, and four welding positions 53 are formed in total so that the ultrasonic welding device can carry out ultrasonic welding on the welding positions.
The base 1 is provided with a positioning groove 13, the positioning groove 13 is arranged between the two accommodating grooves 11, and the positioning plate 2 is buckled with the positioning groove 13, so that the positioning plate 2 positions the positive electrode pole piece 41 and/or the negative electrode pole piece 42.
A certain distance is reserved between the positive electrode plate 41 and the negative electrode plate 42 of the same battery cell body, and the center distance between the positive electrode plate 41 and the negative electrode plate 42 is generally kept between 50 mm and 90mm so as to reserve the welding space of the ultrasonic welding device.
According to some embodiments of the present utility model, the adjusting mechanism 12 includes a handle 121, a positioning shaft 122, an elastic member 123, a limiting block 124, and a contact block 125, where the contact block 125 and the limiting block 124 are respectively located at two inner and outer sides of the accommodating groove 11, the positioning shaft 122 is connected between the contact block 125 and the limiting block 124, the positioning shaft 122 penetrates through the accommodating groove 11, the elastic member 123 is penetrated on the positioning shaft 122, and the elastic member 123 is disposed between the accommodating groove 11 and the contact block 125; the handle 121 is installed on the limiting block 124, and the handle 121 is adjusted to enable the linkage contact block 125 to abut against or separate from the battery cell.
After the battery cell is loaded in the accommodating groove, the handle 121 is adjusted to enable the contact block 125 to be abutted against the battery cell, and the elastic force of the elastic piece 123 is used for tightly abutting against the battery cell after the handle 121 is locked, so that the battery cell is accurately positioned. When the battery cell is unloaded, the contact block 125 is disengaged from the battery cell by reversing the adjustment handle 121, so that the elastic member 123 is compressed, thereby unloading the battery cell. Because the contact block is made of polyurethane rubber, the contact block is in direct contact with the battery cell, and the damage to the battery cell is avoided. Because the contact block is made of polyurethane rubber, the contact block is in direct contact with the battery cell, and the damage to the battery cell is avoided.
The stability of the mounting of the battery cell body in the right-left direction can be maintained by abutting the adjustment mechanism 12 against one side of the battery cell body 4. The battery cell can be prevented from jumping in the up-down direction by attaching the positioning plate to the upper surface of the cell body, and the effect of welding the electrode lugs is affected.
The bottom surfaces of the positive electrode piece 41 and the negative electrode piece 42 of the battery cell body 4 are kept flush, and a certain interval is formed between the bottom surfaces of the positive electrode piece 41 and/or the negative electrode piece 42 and the bottom surface of the battery cell body 4, wherein the interval is a (shown in reference to fig. 3), and the interval a in the figure is the distance in the up-down direction.
When ultrasonic welding is performed, in order to keep the positive pole piece or the negative pole piece in contact with the welding bottom die, if a height difference exists between the positive pole piece or the negative pole piece and the welding bottom die, gaskets are generally installed between the bottom surface of the battery cell body 4 and the surface of the accommodating groove 11, and the gaskets with different thicknesses are installed to ensure that the positive pole piece and/or the negative pole piece is kept in contact with the welding bottom die, the positive pole piece and the negative pole piece are supported through the welding bottom die, and then the positive pole piece and the negative pole piece are welded through an ultrasonic welding head. The gasket adopts polyurethane rubber material, can play the function of buffering protection to the lower surface of battery cell.
According to some embodiments of the present utility model, the cell bodies 4 have a square structure, and the interval between two cell bodies 4 is b (refer to fig. 4), where the interval b is a distance in the left-right direction.
According to some embodiments of the present utility model, the pressing plate 3 is rotatably connected to the base 1, and the pressing plate 3 is matched with the accommodating groove 11, so that the battery cells can be conveniently loaded and unloaded.
Specifically, a spring lock 12 is provided between the accommodation groove 11 and the platen 3, and the opening and closing between the platen 3 and the accommodation groove 11 are achieved by detaching the spring lock 12. Through opening and closing of clamp plate 3, can be convenient for install and dismantle electric core body 4 on the one hand, on the other hand can play dustproof effect to electric core body 4 in the holding tank 11 through clamp plate 3 to aluminium foil or copper foil piece get into the surface of electric core body when welding electric core tab, are favorable to guaranteeing its clean and tidy degree when encapsulating battery cell.
Handles 14 are respectively arranged on two sides of the base 1, and the handles 14 are symmetrically arranged, so that the whole battery core final welding fixture is convenient to carry in the whole manufacturing process of the lithium battery.
The foregoing is only illustrative of the preferred embodiments and principles of the present utility model, and changes in specific embodiments will occur to those skilled in the art upon consideration of the teachings provided herein, and such changes are intended to be included within the scope of the utility model as defined by the claims.
Claims (10)
1. The square shell battery cell final welding fixture is characterized by comprising a base, a positioning plate and a pressing plate, wherein two accommodating grooves are formed in the base, battery cell bodies are respectively installed, and the positioning plate is installed between the two accommodating grooves and used for positioning pole pieces of the two battery cell bodies; the end parts of the two accommodating grooves are respectively connected with an adjusting mechanism, and the adjusting mechanisms penetrate through one side of the accommodating groove and are used for being abutted against the side wall of the battery cell body; and the holding groove is connected with a pressing plate and used for pressing the upper surface of the battery cell body.
2. The square-shell battery cell final welding fixture according to claim 1, wherein each battery cell body comprises a positive electrode plate and a negative electrode plate, the positive electrode plates and the negative electrode plates of the two battery cell bodies are respectively correspondingly abutted, and the positive electrode plates and the negative electrode plates are respectively arranged on a positive electrode connecting sheet and a negative electrode connecting sheet.
3. The square-shell battery cell final welding fixture according to claim 2, wherein a certain distance is reserved between the bottom surface of the battery cell body and the bottom surface of the positive electrode plate and/or the negative electrode plate.
4. The terminal welding fixture for the square-shell battery cells according to claim 2, wherein the positioning plate is provided with a plurality of welding grooves, the plurality of welding grooves are respectively arranged corresponding to the positive electrode plate and/or the negative electrode plate, and welding positions are formed between the welding grooves and the positive electrode plate and/or the negative electrode plate.
5. The terminal welding fixture for square-shell cells according to claim 1, wherein the base is provided with a positioning groove, the positioning groove is arranged between the two accommodating grooves, and the positioning plate is fastened with the positioning groove, so that the positioning plate positions the pole piece of the cell body.
6. The square-shell battery cell final welding fixture according to claim 1, wherein the adjusting mechanism comprises a handle, a positioning shaft, an elastic piece, a limiting block and a contact block, the contact block and the limiting block are respectively positioned on the inner side and the outer side of the accommodating groove, the positioning shaft is connected between the contact block and the limiting block, the positioning shaft penetrates through the accommodating groove, the elastic piece is arranged on the positioning shaft in a penetrating manner, and the elastic piece is arranged between the accommodating groove and the contact block; and a handle is arranged on the limiting block, and the handle is adjusted to link the contact block to abut against or separate from the battery cell.
7. The square-case cell end-welding jig according to claim 1, wherein the pressing plate is detachably connected to the base.
8. The square-case cell end welding jig according to claim 1, wherein a spacer is installed between the bottom surface of the cell body and the surface of the receiving groove.
9. The square-shell cell end welding fixture of claim 1, wherein the cell body is square in structure.
10. The square-shell battery cell final welding fixture according to claim 1, wherein handles are respectively arranged on two sides of the base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321651820.8U CN220178547U (en) | 2023-06-28 | 2023-06-28 | Square shell battery core final welding fixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321651820.8U CN220178547U (en) | 2023-06-28 | 2023-06-28 | Square shell battery core final welding fixture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220178547U true CN220178547U (en) | 2023-12-15 |
Family
ID=89099565
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321651820.8U Active CN220178547U (en) | 2023-06-28 | 2023-06-28 | Square shell battery core final welding fixture |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220178547U (en) |
-
2023
- 2023-06-28 CN CN202321651820.8U patent/CN220178547U/en active Active
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |