Combined battery cell welding clamp

Abstract

The utility model belongs to the technical field of battery cell welding, and particularly relates to a combined type battery cell welding clamp which comprises a first base plate, a second base plate, a positioning plate and a locking mechanism, and the locking mechanism and the positioning plate are installed between the first base plate and the second base plate. A positioning mechanism and a battery cell body are respectively arranged on the first substrate and the second substrate; the positioning mechanism is used for positioning the battery cell bodies, so that tabs of the two battery cell bodies are overlapped, and the locking mechanism is used for adjusting the distance between the first base plate and / or the second base plate and the positioning plate, so that the battery cell bodies with different sizes can be adapted; the battery cell fixing device can be suitable for battery cells with different widths and lengths so as to meet the application of the battery cells with different sizes and specifications, and is convenient to disassemble so as to save the occupied space and convenient to replace through the split structure design mode of the first base plate, the second base plate and the positioning plate, and the use efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery core welding, and in particular relates to a combined battery core welding fixture. Background Art

[0002] With the rapid development and application of electric vehicles and the increasing requirements for energy conservation and environmental protection around the world, the demand for key components in the electric vehicle industry, automotive battery cells, is also increasing. At present, as the quality system management of battery cell manufacturers is becoming more and more perfect, the production requirements of battery cells are becoming higher and higher.

[0003] Generally speaking, battery cells need to go through at least two processes, pre-welding and final welding, during welding. The multi-layer aluminum foil tabs and multi-layer copper foil tabs of a single cell are welded together to form positive and negative pole pieces, and the positive and negative pole pieces of multiple cells are welded together in series through final welding, and then packaged into a battery case to form a lithium battery. When performing final welding on the pole pieces of multiple cells, multiple different cells are placed in the final welding fixture, and the pairing and final welding of the pole pieces of different cells are completed through the positive and negative ultrasonic welding devices.

[0004] The inventors have discovered that the existing final welding fixtures have at least the following technical problems in practical applications: on the one hand, due to the differences in lengths and widths of different battery cells, when the battery cells are welded and positioned, the existing final welding fixtures are only suitable for battery cells of a single size and cannot be used for battery cells of different sizes; on the other hand, since the structure of the existing final welding fixture for mounting the battery cells adopts an overall design, the overall structure occupies a large space, and when some structures are defective and cannot be used, it is cumbersome to replace, affecting the efficiency of use.

[0005] Based on this, it is necessary to design a combined battery core welding fixture to overcome the defects and shortcomings of existing fixtures in practical applications. Utility Model Content

[0006] Based on the above-mentioned shortcomings and deficiencies in the prior art, one of the purposes of the present invention is to at least solve one or more of the above-mentioned problems in the prior art. In other words, one of the purposes of the present invention is to provide a combined battery core welding fixture that meets one or more of the above-mentioned needs.

[0007] In order to achieve the above utility model purpose, the utility model adopts the following technical solutions:

[0008] The utility model provides a combined battery cell welding fixture, comprising a first substrate, a second substrate, a positioning plate and a locking mechanism, wherein the locking mechanism and the positioning plate are installed between the first substrate and the second substrate, and the first substrate and the second substrate are respectively provided with a positioning mechanism and a battery cell body; the battery cell body is positioned by the positioning mechanism so that the pole pieces of the two battery cell bodies overlap, and the locking mechanism is used to adjust the distance between the first substrate and / or the second substrate and the positioning plate to adapt to battery cell bodies of different sizes.

[0009] As a preferred solution, a plurality of positioning pins are respectively installed between the first substrate and / or the second substrate and the positioning plate.

[0010] As a preferred solution, the positioning mechanism includes a limiting assembly and a limiting plate, the limiting plate is mounted on the first substrate and / or the second substrate, and the limiting assembly cooperates with the limiting plate to position the battery cell body.

[0011] As a preferred solution, the limiting assembly includes a push plate, a fixed plate, a movable plate, an elastic member, a guide column and a handle. The guide column is connected between the movable plate and the push plate. The guide column passes through the fixed plate. An elastic member is passed through the guide column. The elastic member is arranged between the push plate and the fixed plate. A handle is installed on the movable plate. By adjusting the handle, the push plate can be linked to abut against or detach from the battery cell body.

[0012] As a preferred solution, the fixing plate is fixedly connected to the first substrate and / or the second substrate.

[0013] As a preferred embodiment, each of the battery cell bodies comprises a positive electrode sheet and a negative electrode sheet, the positive electrode sheets and negative electrode sheets of the two battery cell bodies are overlapped respectively, and the positive electrode sheet and the negative electrode sheet are respectively arranged on the positive electrode connecting sheet and the negative electrode connecting sheet.

[0014] As a preferred solution, it also includes a pressing plate, which is detachably connected to the positioning plate.

[0015] As a preferred solution, the positioning plate has two welding grooves, and the two welding grooves are respectively arranged corresponding to the positive electrode sheet and / or the negative electrode sheet.

[0016] As a preferred solution, the locking mechanism includes a locking screw and a locking nut, screw holes are correspondingly provided between the first substrate and the second substrate, the locking screw is connected to the two screw holes and is locked by the locking nut.

[0017] As a preferred solution, a handle is provided on the first substrate and the second substrate respectively.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] The utility model provides a combined battery cell welding fixture, which can be applied to battery cells of different widths by adjusting the spacing between the first substrate and / or the second substrate and the positioning plate, and can be applied to battery cells of different lengths by adjusting the distance between the limiting component and the limiting plate, thereby being applicable to battery cells of different sizes and specifications to meet more application scenarios.

[0020] The utility model provides a combined battery core welding fixture. Through the split structural design of the first substrate, the second substrate and the positioning plate, when the fixture is not in use, each group of components can be disassembled and placed separately to save space. If a partial structure is defective, it is easy to replace, thereby improving the use efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, drawings of other embodiments can be obtained based on these drawings without paying creative work.

[0022] Figure 1 This is a structural schematic diagram of a combined battery core welding fixture according to an embodiment of the utility model;

[0023] Figure 2 This is a schematic diagram of another viewing angle of a combined battery core welding fixture according to an embodiment of the utility model;

[0024] Figure 3 It is a top view of a combined battery core welding fixture according to an embodiment of the utility model;

[0025] Figure 4 It is a cross-sectional view of a combined battery core welding fixture according to an embodiment of the utility model;

[0026] Figure 5 It is a structural schematic diagram of the limit assembly of an embodiment of the utility model;

[0027] Figure 6 It is a structural schematic diagram of a pressing plate in an embodiment of the utility model;

[0028] In the figure: 1 first substrate, 11 handle, 2 second substrate, 3 positioning plate, 31 positioning pin, 32 welding groove, 4 locking mechanism, 41 locking screw, 42 locking nut, 5 positioning mechanism, 51 limiting assembly, 511 push plate, 512 fixed plate, 513 movable plate, 514 elastic member, 515 guide column, 516 handle, 52 limiting plate, 6 pressing plate, 7 battery body, 71 positive electrode sheet, 72 negative electrode sheet, 81 positive connecting piece, 82 negative connecting piece, 83 welding position. DETAILED DESCRIPTION

[0029] In order to more clearly illustrate the embodiments of the present application, the specific implementation methods of the present application will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0030] In the description of the embodiments of the present application, terms such as "up", "down", "left", and "right" and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation.

[0031] like Figures 1 to 6 As shown, this embodiment provides a combined battery cell welding fixture, including a first substrate 1, a second substrate 2, a positioning plate 3 and a locking mechanism 4, the locking mechanism 4 and the positioning plate 3 are installed between the first substrate 1 and the second substrate 2, and the first substrate 1 and the second substrate 2 are respectively provided with a positioning mechanism 5 and a battery cell body 7; the positioning mechanism 5 is used to position the battery cell body 7 so that the pole pieces of the two battery cell bodies 7 overlap, and the locking mechanism 4 is used to adjust the distance between the first substrate 1 and / or the second substrate 2 and the positioning plate 3 to adapt to battery cell bodies 7 of different sizes.

[0032] Specifically, two battery cell bodies 7 can be installed on the two first substrates 1 and the second substrate 2 at the same time. By limiting and fixing the two battery cell bodies 7, each battery cell body 7 includes a positive electrode sheet 71 and a negative electrode sheet 72. The positive electrode sheets 71 of the two battery cell bodies 7 are abutted against each other, and the negative electrode sheets 72 are also abutted against each other. The positive electrode sheet 71 and the negative electrode sheet 72 are respectively arranged on the positive connecting sheet 81 and the negative connecting sheet 82. The positive electrode sheet 41 and the positive connecting sheet 51 as well as the negative electrode sheet 42 and the negative connecting sheet 52 are respectively welded into shape by an ultrasonic welding device.

[0033] Furthermore, there is a certain distance between the positive electrode sheet 71 and the negative electrode sheet 72 of the same battery cell body. The center distance between the positive electrode sheet 71 and the negative electrode sheet 72 is generally maintained between 50 and 90 mm to reserve welding space for the ultrasonic welding device.

[0034] Furthermore, the first substrate 1 and the second substrate 2 are located on both sides of the positioning plate 3, and a plurality of positioning pins 31 are respectively installed between the first substrate 1 and / or the second substrate 2 and the positioning plate 3, and the spacing between the first substrate 1 and / or the second substrate 2 and the positioning plate 3 can be adjusted by the positioning pins 31 to adapt to the installation of battery cells of different widths. Specifically, three positioning pins 31 are installed between the first substrate 1 and the positioning plate 3, and correspondingly, three positioning pins 31 are installed between the second substrate 2 and the positioning plate 3. The number of positioning pins is not limited to the above number, and can be set according to actual needs.

[0035] The locking mechanism 4 in this embodiment includes a locking screw 41 and a locking nut 42. Screw holes are correspondingly provided between the first substrate 1 and the second substrate 2. The locking screw 41 is connected to the two screw holes and is locked by the locking nut 42.

[0036] Specifically, screw holes are respectively provided at the front and rear ends of the first substrate 1 and the second substrate 2, and a locking screw 41 is installed between the two corresponding screw holes, and the two ends of the locking screw 41 are respectively matched with locking nuts 42. When the pole pieces of the battery bodies of different specifications are different in size, the distance between the first substrate 1 and the second substrate 2 is adjusted by adjusting the two locking nuts 42 to adapt to the welding scenarios of the battery bodies of different specifications.

[0037] The positioning mechanism 5 in this embodiment includes a limiting assembly 51 and a limiting plate 52 . The limiting plate 52 is mounted on the first substrate 1 and / or the second substrate 2 . The limiting assembly 51 cooperates with the limiting plate 52 to position the battery body 7 .

[0038] Specifically, the limiting assembly 51 includes a push plate 511, a fixed plate 512, a movable plate 513, an elastic member 514, a guide column 515 and a handle 516. The fixed plate 512 is fixedly connected to the first substrate 1 and / or the second substrate 2. The movable plate 513 and the push plate 511 are respectively arranged on both sides of the fixed plate 512. The guide column 515 is connected between the movable plate 513 and the push plate 511. The guide column 515 passes through the fixed plate 512 and guides the fit. The elastic member 514 is passed through the guide column 515 between the fixed plate 512 and the push plate 511. The handle 516 is installed at the outer end of the movable plate 513. By adjusting the handle 516, the push plate 511 can be linked to abut against or detach from the battery body 7.

[0039] When loading the battery cell body, firstly, by pulling the handle 516 outward, the handle 516 and the movable plate 513 will link the push plate 511 through the guide column 515 to compress the elastic member 514, so that the battery cell body installation position is reserved between the push plate 511 and the limit plate 52, and the battery cell body is loaded in the installation position of the first substrate 1 and / or the second substrate 3; then, after releasing the handle 516, the elastic force of the elastic member 514 makes the side of the push plate 511 close to the side wall of the battery cell body, thereby realizing the precise positioning of the battery cell.

[0040] When the battery cell body is unloaded, the handle 516 is pulled outward to compress the elastic member 514, and the push plate 511 is separated from the battery cell body, so that the battery cell body can be taken out. Since the push plate 511 is made of polyurethane rubber, the push plate 511 directly contacts the battery cell body without causing damage to the battery cell.

[0041] Furthermore, the limiting plate 52 is detachably connected to the first substrate 1 and / or the second substrate 2, and the installation position can be adjusted according to the size of the battery body 1. By cooperating with the limiting assembly 51 and the limiting plate 52 to abut the side wall of the battery body 7, a restraining force can be provided to the battery body, and the battery body can be accurately positioned to maintain the stability of the battery body in the front and rear directions. By fitting the pressing plate with the upper surface of the battery body, the battery cell can be prevented from jumping in the up and down directions, which affects the effect of welding the pole ear.

[0042] The present embodiment further comprises a pressing plate 6, which is detachably connected to the positioning plate 3. Positioning pins are installed on the positioning plate 3 along the vertical direction, and the pressing plate 6 is connected to the positioning plate 3 through the positioning pins.

[0043] By cooperating with the pressing plate 6 and the positioning plate 3, on the one hand, the pressing plate 6 can be positioned to prevent misalignment when the positioning plate 3 is placed and pressed; on the other hand, the pressing plate 6 can provide a dust-proof effect on the battery cell body 7 to prevent aluminum foil or copper foil debris from entering the surface of the battery cell body when welding the battery cell pole pieces, which is beneficial to ensure the cleanliness of the battery cell when packaging it.

[0044] Furthermore, the lower surface of the pressing plate 6 has a peek non-metallic layer, and the positive electrode sheet and / or the negative electrode sheet is pressed by the peek non-metallic layer, which is beneficial to protecting the surface of the electrode sheet, avoiding scratches, and can play a buffering protection function.

[0045] The positioning plate 3 in this embodiment has two welding grooves 32 , and the two welding grooves 32 are respectively arranged corresponding to the positive electrode sheet 71 and / or the negative electrode sheet 72 .

[0046] Specifically, the positioning plate 3 has two welding grooves 32, which are respectively in contact with the positive electrode sheet 71 and / or the negative electrode sheet 72. The positive electrode sheet 71 and / or the negative electrode sheet 72 are pressed onto the positioning plate 3 by the pressing plate 6 to form four welding positions, and the two positive electrode sheets 71 and the two negative electrode sheets 72 in the four welding positions are welded into shape by an ultrasonic welding device.

[0047] In this embodiment, handles 11 are respectively disposed on the first substrate 1 and the second substrate 2. The symmetrically disposed handles 11 facilitate the transportation of the entire battery cell final welding fixture during the entire manufacturing process of the lithium battery.

[0048] This embodiment adjusts the spacing between the first substrate and / or the second substrate and the positioning plate to be suitable for cells of different widths, and adjusts the distance between the limit assembly and the limit plate to be suitable for cells of different lengths, thereby being suitable for cells of different sizes and specifications to meet more application scenarios. Through the split structural design of the first substrate, the second substrate and the positioning plate, when the fixture is not in use, each group of components can be disassembled and placed separately to save space, and if there are defects in some structures, it is easy to replace, thereby improving the efficiency of use.

[0049] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, X and / or Y may represent: X exists alone, X and Y exist at the same time, and Y exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0050] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0051] The above description is only a detailed description of the preferred embodiments and principles of the present application. For ordinary technicians in this field, there will be changes in the specific implementation methods based on the ideas provided by the present application, and these changes should also be regarded as the scope of protection of the present application.

Claims

1. A combined battery core welding fixture, characterized in that: It includes a first substrate, a second substrate, a positioning plate and a locking mechanism, wherein the locking mechanism and the positioning plate are installed between the first substrate and the second substrate, and the first substrate and the second substrate are respectively provided with a positioning mechanism and a battery cell body; the battery cell body is positioned by the positioning mechanism so that the pole pieces of the two battery cell bodies overlap, and the locking mechanism is used to adjust the distance between the first substrate and / or the second substrate and the positioning plate to adapt to battery cell bodies of different sizes.

2. The combined battery core welding fixture according to claim 1, characterized in that: A plurality of positioning pins are respectively installed between the first substrate and / or the second substrate and the positioning plate.

3. The combined battery core welding fixture according to claim 1, characterized in that: The positioning mechanism comprises a limiting assembly and a limiting plate. The limiting plate is mounted on the first substrate and / or the second substrate. The limiting assembly cooperates with the limiting plate to position the battery cell body.

4. The combined battery core welding fixture according to claim 3, characterized in that: The limiting assembly includes a push plate, a fixed plate, a movable plate, an elastic member, a guide column and a handle. The guide column is connected between the movable plate and the push plate. The guide column passes through the fixed plate. An elastic member is passed through the guide column. The elastic member is arranged between the push plate and the fixed plate. A handle is installed on the movable plate. By adjusting the handle, the push plate can be linked to abut against or detach from the battery cell body.

5. The combined battery core welding fixture according to claim 4, characterized in that: The fixing plate is fixedly connected to the first substrate and / or the second substrate.

6. The combined battery core welding fixture according to claim 1, characterized in that: Each of the battery cell bodies comprises a positive electrode sheet and a negative electrode sheet, the positive electrode sheets and the negative electrode sheets of the two battery cell bodies are overlapped correspondingly, and the positive electrode sheet and the negative electrode sheet are respectively arranged on the positive electrode connecting sheet and the negative electrode connecting sheet.

7. The combined battery core welding fixture according to claim 6, characterized in that: It also includes a pressing plate, which is detachably connected to the positioning plate.

8. The combined battery core welding fixture according to claim 6, characterized in that: The positioning plate has two welding grooves, and the two welding grooves are respectively arranged corresponding to the positive electrode sheet and / or the negative electrode sheet.

9. The combined battery core welding fixture according to claim 1, characterized in that: The locking mechanism includes a locking screw and a locking nut. Screw holes are correspondingly arranged between the first substrate and the second substrate. The locking screw is connected to the two screw holes and is locked by the locking nut.

10. The combined battery core welding fixture according to claim 1, characterized in that: Handles are respectively provided on the first substrate and the second substrate.

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