Pressing mechanism and welding device

Abstract

The utility model relates to the technical field of battery processing devices, aims to solve the problem of how to reduce the welding error of a tab and a nickel sheet, and provides a pressing mechanism and a welding device. The pressing mechanism comprises two pressing pieces, two first driving assemblies, a second driving assembly and two elastic pieces. The two pressing pieces are arranged in a spaced mode in the first direction, the two first driving assemblies correspond to the two pressing pieces respectively, and the first driving assemblies are in transmission connection with the corresponding pressing pieces so as to drive the corresponding pressing pieces to move in the first direction. The second driving assembly is in transmission connection with the two first driving assemblies so as to drive the two first driving assemblies to ascend and descend together in the second direction. The second direction is perpendicular to the first direction. The two elastic pieces correspond to the two pressing pieces respectively, and the elastic pieces elastically abut against the corresponding pressing pieces, so that the corresponding tabs are elastically pressed on the nickel sheet in the second direction through the pressing pieces. The method has the beneficial effect that the welding error of the tab and the nickel sheet is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of battery processing devices, and more particularly, to a pressing mechanism and a welding device. Background Art

[0002] A battery includes a battery cell and a battery protection board. To facilitate welding two pole tabs of the battery cell to two nickel sheets of the battery protection board respectively, a pressing mechanism is provided in the related art to press the pole tabs against the nickel sheets during welding. However, the pressing mechanism in the related art is prone to cause large welding errors. Summary of the Utility Model

[0003] The present application provides a pressing mechanism and a welding device to solve the problem of how to reduce the welding error between the pole tabs and the nickel sheets.

[0004] According to one aspect of the present application, a pressing mechanism is provided for pressing two pole tabs of a battery cell against two nickel sheets of a battery protection board respectively. The pressing mechanism includes two pressing members, two first driving components, a second driving component, and two elastic members. The two pressing members are spaced apart from each other along a first direction, and the two pressing members correspond to the two pole tabs respectively. The two first driving components correspond to the two pressing members respectively. The first driving component is drivingly connected to the corresponding pressing member to drive the corresponding pressing member to move along the first direction. The second driving component is drivingly connected to the two first driving components to drive the two first driving components to lift together along a second direction, so that the two pressing members press the corresponding pole tabs against the nickel sheets along the second direction respectively; the second direction is perpendicular to the first direction. The two elastic members correspond to the two pressing members respectively. The elastic member elastically abuts against the corresponding pressing member to elastically press the corresponding pole tab against the nickel sheet along the second direction through the pressing member.

[0005] For the above pressing mechanism, two pressing members and two elastic members are provided, so that the pressing member elastically presses the corresponding single pole tab against the nickel sheet along the second direction, thereby avoiding excessive pressing force applied by the pressing member along the second direction, which may cause damage to the pole tab or the nickel sheet, and avoiding too small pressing force applied by the pressing member along the second direction, which may affect the welding quality between the pole tab and the nickel sheet. By driving the two first driving components to lift together along the second direction by the second driving component, the two pressing members simultaneously press the two pole tabs against the two nickel sheets, avoiding the accumulation of welding errors caused by pressing the two pole tabs against the two nickel sheets successively. By drivingly connecting the two first driving components to the two pressing members respectively, it is convenient to accurately position each pressing member relative to the corresponding pole tab. Therefore, the positioning accuracy of the two pressing members relative to the corresponding pole tabs can be improved respectively, which is beneficial to improving the welding quality. Therefore, by adopting the above pressing mechanism, it is beneficial to reduce the welding error between the pole tab and the nickel sheet.

[0006] In one embodiment, the pressing mechanism further includes a CCD positioning component. The CCD positioning component faces the two pressing members and is configured to collect the position information of the two pressing members along the first direction. The first driving component is electrically connected to the CCD positioning component and is configured to be able to drive the corresponding pressing member to move to the corresponding tab position along the first direction according to the position information.

[0007] In one embodiment, the two first driving components are respectively arranged on the same side of the two pressing members along the third direction, and the two first driving components are arranged along the second direction, where the third direction is perpendicular to the first direction and the second direction respectively.

[0008] In one embodiment, the second driving component is connected to the side of the first driving component away from the pressing member along the third direction.

[0009] In one embodiment, the pressing mechanism further includes a housing. The two first driving components respectively pass through the housing along the first direction. One side of the housing along the third direction is provided with an opening. The first driving component extends out of the opening and is connected to the pressing member, and the side of the housing along the third direction away from the opening is connected to the second driving component.

[0010] In one embodiment, the pressing member has a first end and a second end opposite to each other along the second direction. The first end is connected to one end of the elastic member away from the first driving component, and the second end is configured to press the corresponding tab against the nickel sheet. An avoidance hole penetrating the pressing member along the second direction is provided on the second end, and the avoidance hole is configured to allow a laser beam emitted by a laser welding mechanism to pass through, so as to weld the corresponding tab to the nickel sheet.

[0011] In one embodiment, the battery cell further includes a battery cell body, and the two tabs extend out of the same side of the battery cell body along the third direction. The second end includes a connecting block and a pressing head. The pressing head is connected to the side of the connecting block away from the elastic member along the second direction; the avoidance hole penetrates the connecting block and the pressing head along the second direction. The two sides of the pressing head along the third direction are respectively concave relative to the connecting block to form avoidance grooves; one avoidance groove is configured to avoid the battery protection board, and the other avoidance groove is configured to avoid the battery cell body, where the third direction is perpendicular to the first direction and the second direction respectively.

[0012] In one embodiment, the pressing member further includes an inclined connecting bar, and the inclined connecting bar is connected between the first end and the connecting block, and the end of the inclined connecting bar connected to the connecting block protrudes outward away from the first driving component.

[0013] In one embodiment, one end of the second driving component along the second direction is connected to the first driving component. The pressing mechanism further includes a base body, and the base body supports the end of the second driving component away from the first driving component.

[0014] According to another aspect of the present application, a welding device is provided, including:

[0015] The pressing mechanism in any of the above embodiments;

[0016] A laser welding mechanism for welding two tab ears to two nickel sheets respectively. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the accompanying drawings in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can also be obtained based on these drawings without creative efforts.

[0018] Figure 1 It is a schematic structural diagram of a welding device in an embodiment of the present application, and the battery cell and the battery protection board are additionally shown in the figure.

[0019] Figure 2 It is Figure 1 A schematic diagram of the assembled state of the battery cell and the battery protection board in the shown embodiment.

[0020] Figure 3 It is Figure 1 A partial structural diagram of the battery cell and the battery protection board in the shown embodiment from another perspective.

[0021] Figure 4 It is Figure 1 A schematic structural diagram of the pressing mechanism in the shown embodiment.

[0022] Figure 5 It is Figure 1 An exploded view of the pressing member, the tab ear and the nickel sheet in the shown embodiment.

[0023] Figure 6 It is Figure 1 A partial structural diagram of the pressing member, the tab ear and the nickel sheet in the shown embodiment.

[0024] Figure 7 It is Figure 1 A schematic structural diagram of the pressing mechanism in the shown embodiment from another perspective.

[0025] MAIN ELEMENT SYMBOL DESCRIPTION:

[0026] Welding device 1000

[0027] Pressing mechanism 100

[0028] Pressing member 10

[0029] First end 11

[0030] Second end 12

[0031] Avoidance hole 12a

[0032] Avoidance groove 12b

[0033] Connecting block 121

[0034] Pressing head 122

[0035] Oblique connecting bar 13

[0036] First driving assembly 20

[0037] Second driving assembly 30

[0038] Elastic member 40

[0039] Shell 50

[0040] Opening 50a

[0041] Insulating member 60

[0042] Base body 70

[0043] Laser welding mechanism 200

[0044] Electric core 2000

[0045] Tab 2001

[0046] Electric core body 2002

[0047] Battery protection board 3000

[0048] Nickel sheet 3001

[0049] First direction X

[0050] Second direction Y

[0051] Third direction Z Specific embodiments

[0052] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments.

[0053] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time. When an element is considered to be "disposed on" another element, it can be directly disposed on the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0054] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the art to which this application belongs. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The term "or / and" used herein includes any and all combinations of one or more of the related listed items.

[0055] Some embodiments of this application will be described in detail. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0056] Embodiment

[0057] Figure 1 is a schematic structural diagram of a welding device 1000 in an embodiment of this application. The battery cell 2000 and the battery protection board 3000 are additionally shown in the figure; Figure 2 is Figure 1 a schematic diagram of the assembled state of the battery cell 2000 and the battery protection board 3000 in the shown embodiment; Figure 3 is Figure 1 a partial schematic diagram of the battery cell 2000 and the battery protection board 3000 in the shown embodiment from another perspective.

[0058] Referring to Figures 1 to 3 , an embodiment of this application provides a welding device 1000, which includes a pressing mechanism 100 and a laser welding mechanism 200 (such as a laser generator). The laser welding mechanism 200 is used to weld two tab ears 2001 of the battery cell 2000 to two nickel sheets 3001 of the battery protection board 3000 respectively.

[0059] During use, first press the tab ear 2001 against the nickel sheet 3001 through the pressing mechanism 100, and then weld the tab ear 2001 to the nickel sheet 3001 through the laser welding mechanism 200. In this way, since the tab ear 2001 is pressed against the nickel sheet 3001 during welding, it is beneficial to improve the welding accuracy between the tab ear 2001 and the nickel sheet 3001.

[0060] Figure 4 is Figure 1A schematic structural diagram of the clamping mechanism 100 in the illustrated embodiment; Figure 5 for Figure 1 An exploded schematic diagram of the pressing member 10, the tab 2001 and the nickel sheet 3001 in the illustrated embodiment; Figure 6 for Figure 1 A schematic diagram of the partial structure of the pressing member 10, the tab 2001 and the nickel sheet 3001 in the illustrated embodiment.

[0061] See also Figures 4 to 6 The clamping mechanism 100 in this embodiment is used to respectively clamp the two pole ears 2001 of the battery cell 2000 onto the two nickel sheets 3001 of the battery protection board 3000 (PCM, Protection Circuit Module). The clamping mechanism 100 includes two clamping members 10, two first drive components 20, a second drive component 30 and two elastic members 40.

[0062] The two clamping members 10 are arranged at intervals from each other along the first direction X, and the two clamping members 10 correspond to the two tabs 2001 respectively. The two first driving assemblies 20 correspond to the two clamping members 10 respectively, and the first driving assemblies 20 are transmission-connected to the corresponding clamping members 10 to drive the corresponding clamping members 10 to move along the first direction X. The second driving assembly 30 is transmission-connected to the two first driving assemblies 20 to drive the two first driving assemblies 20 to rise and fall together along the second direction Y, so that the two clamping members 10 respectively press the corresponding tabs 2001 against the nickel sheet 3001 along the second direction Y, and the second direction Y is perpendicular to the first direction X. The two elastic members 40 (such as coil springs) correspond to the two clamping members 10 respectively, and the elastic members 40 elastically press against the corresponding clamping members 10, so that the corresponding tabs 2001 are elastically pressed against the nickel sheet 3001 along the second direction Y through the clamping members 10.

[0063] The above-mentioned clamping mechanism 100, by setting two clamping members 10 and two elastic members 40, enables the clamping member 10 to elastically press the corresponding single pole ear 2001 to the nickel sheet 3001 along the second direction Y, thereby avoiding that the clamping force applied by the clamping member 10 along the second direction Y is too large, resulting in damage to the pole ear 2001 or the nickel sheet 3001, and avoiding that the clamping force applied by the clamping member 10 along the second direction Y is too small, affecting the welding quality of the pole ear 2001 and the nickel sheet 3001.

[0064] It should be noted that a clamping mechanism is provided in the related art, and the clamping mechanism respectively clamps the two pole tabs 2001 to the nickel sheet 3001 through the two ends of a clamping member. However, when there is a size error between the two pole tabs 2001, the clamping member in the related art is prone to cause the degree of clamping of the two pole tabs 2001 to be inconsistent. For example, when one of the pole tabs 2001 is pressed to the corresponding nickel sheet 3001, the other pole tab 2001 is not pressed to the corresponding nickel sheet 3001, which affects the welding quality. In the above embodiment, since the clamping member 10 and the elastic member 40 are both arranged in a one-to-one correspondence with the pole tabs 2001, the size error between the two pole tabs 2001 along the second direction Y can be avoided from affecting the welding quality.

[0065] The second drive assembly 30 drives the two first drive assemblies 20 to rise and fall together along the second direction Y, so that the two clamping members 10 simultaneously clamp the two tabs 2001 against the two nickel sheets 3001, thereby improving the clamping efficiency and avoiding the accumulation of welding errors caused by successively clamping the two tabs 2001 against the two nickel sheets 3001. The two first drive assemblies 20 are respectively connected to the two clamping members 10 by transmission, so that each clamping member 10 can be accurately positioned relative to the corresponding tab 2001, thereby respectively improving the positioning accuracy of the two clamping members 10 relative to the corresponding tab 2001, thereby facilitating improving the welding quality.

[0066] In some embodiments, the clamping mechanism 100 further includes a CCD positioning assembly (not shown in the figure), which faces the two clamping members 10 and is used to collect position information of the two clamping members 10 along the first direction X. The first driving assembly 20 is electrically connected to the CCD positioning assembly and is configured to drive the corresponding clamping member 10 to move to the corresponding position of the tab 2001 along the first direction X according to the position information. In this way, the position accuracy of the clamping member 10 relative to the corresponding tab 2001 along the first direction X is improved through the CCD positioning assembly, so as to further improve the welding quality of the tab 2001 and the nickel sheet 3001.

[0067] In some embodiments, Figure 4 As shown, the two first drive assemblies 20 are respectively arranged on the same side of the two clamping members 10 along the third direction Z, and the two first drive assemblies 20 are arranged along the second direction Y, wherein the third direction Z is respectively perpendicular to the first direction X and the second direction Y. In this way, it is convenient to arrange and drive the two first drive assemblies 20 to be connected to the corresponding clamping members 10, and the structure of the clamping mechanism 100 is made more compact.

[0068] Figure 7 for Figure 1 A schematic structural diagram of the clamping mechanism 100 in the illustrated embodiment from another viewing angle.

[0069] In some embodiments, as Figure 7 shown, the second driving assembly 30 is connected to the first driving assembly 20 on the side away from the pressing member 10 (see Figure 4 ) along the third direction Z, so that there is a larger space on the other side of the first driving assembly 20 along the third direction Z, facilitating the placement of the battery cell 2000 and the battery protection board 3000, and facilitating the movement of the second driving assembly 30 and the pressing member 10 along the first direction X or the second direction Y.

[0070] In some embodiments, as Figure 4 shown, the pressing mechanism 100 further includes a housing 50, and the two first driving assemblies 20 respectively pass through the housing 50 along the first direction X. An opening 50a is provided on one side of the housing 50 along the third direction Z, the first driving assembly 20 extends out of the opening 50a and is connected to the pressing member 10, and the side of the housing 50 away from the opening 50a along the third direction Z is connected to the second driving assembly 30.

[0071] In some embodiments, as Figure 4 shown, the pressing mechanism 100 further includes an insulating member 60, and the insulating member 60 is connected between the elastic member 40 and the pressing member 10, and the end of the elastic member 40 away from the insulating member 60 is connected to the first driving assembly 20.

[0072] In some embodiments, in combination with Figure 4 and Figure 5 shown, the pressing member 10 has a first end 11 and a second end 12 opposite to each other along the second direction Y. The first end 11 is connected to the end of the elastic member 40 away from the first driving assembly 20, and the second end 12 is used to press the corresponding tab 2001 against the nickel sheet 3001. An avoidance hole 12a penetrating the pressing member 10 along the second direction Y is provided on the second end 12, and the avoidance hole 12a is used for the laser beam emitted by a laser welding mechanism 200 (see Figure 1 ) to pass through, so as to weld the corresponding tab 2001 to the nickel sheet 3001.

[0073] In some embodiments, in combination with Figure 5 and Figure 6 shown, the battery cell 2000 further includes a battery cell body 2002, and the two tabs 2001 extend out of the same side of the battery cell body 2002 along the third direction Z. The second end 12 includes a connecting block 121 and a pressing head 122, and the pressing head 122 is connected to the connecting block 121 away from the elastic member 40 along the second direction Y (see Figure 4) On one side of the [description], the avoidance hole 12a penetrates through the connecting block 121 and the pressing head 122 along the second direction Y. The pressing head 122 is recessed relative to the connecting block 121 on both sides along the third direction Z to form avoidance grooves 12b. One side of the avoidance groove 12b is used to avoid the battery protection plate 3000, and the other side of the avoidance groove 12b is used to avoid the cell body 2002, where the third direction Z is perpendicular to the first direction X and the second direction Y respectively. Thus, it is beneficial to more accurately press the outer periphery of the position to be welded between the tab 2001 and the nickel sheet 3001 through the pressing head 122, and then the welding quality can be improved.

[0074] In some embodiments, such as Figure 6 shown, the pressing member 10 further includes an inclined connecting bar 13. The inclined connecting bar 13 is connected between the first end 11 and the connecting block 121, and one end of the inclined connecting bar 13 connecting the connecting block 121 protrudes outward toward the side away from the first driving assembly 20 (see Figure 4 ). Thus, since the connecting block 121 is opposite to the corresponding tab 2001 along the second direction Y, by setting the inclined connecting bar 13 to protrude outward toward the side away from the first driving assembly 20, the connecting block 121 and the tab 2001 are located outside the first driving assembly 20, facilitating the laser welding mechanism 200 to weld the tab 2001 to the nickel sheet 3001.

[0075] In some embodiments, the pressing member 10 is made of copper material, so that the pressing member 10 has good heat dissipation performance and is not easily deformed.

[0076] In some embodiments, such as Figure 7 shown, one end of the second driving assembly 30 along the second direction Y is connected to the first driving assembly 20, and the pressing mechanism 100 further includes a seat body 70. The seat body 70 supports the end of the second driving assembly 30 away from the first driving assembly 20.

[0077] For the above pressing mechanism 100, in use, first place the cell 2000 and the battery protection plate 3000 at the welding station, then make the first driving assembly 20 drive the pressing member 10 to move along the first direction X to the position of the corresponding tab 2001 according to the position information collected by the CCD positioning assembly, and then make the second driving assembly 30 drive the two first driving assemblies 20 to move together along the second direction Y, so that the pressing member 10 elastically presses the corresponding tab 2001 against the nickel sheet 3001. Then, the laser welding mechanism 200 outputs laser to weld the tab 2001 to the nickel sheet 3001. Therefore, the pressing mechanism 100 can improve the pressing efficiency and pressing accuracy, which is beneficial to improving the welding efficiency and welding quality of the welding device 1000.

[0078] The above embodiments are only used to illustrate the technical solutions of the present application and not to limit them. Although the present application has been described in detail with reference to the above preferred embodiments, those of ordinary skill in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present application without departing from the spirit and scope of the technical solutions of the present application.

Claims

1. A pressing mechanism, characterized in that, The pressing mechanism is used to press the two tabs of the battery cell onto the two nickel sheets of the battery protection plate respectively, and the pressing mechanism includes: Two pressing members are arranged spaced apart from each other along the first direction, and the two pressing members correspond to the two tabs respectively; Two first driving assemblies, corresponding to the two pressing members respectively, the first driving assemblies are transmission-connected to the corresponding pressing members to drive the corresponding pressing members to move along the first direction; A second driving assembly is transmission-connected to the two first driving assemblies to drive the two first driving assemblies to rise and fall together along a second direction, so that the two pressing members press the corresponding tabs against the nickel sheet along the second direction respectively; the second direction is perpendicular to the first direction; Two elastic members correspond to the two pressing members respectively, and the elastic members elastically press against the corresponding pressing members, so that the corresponding tabs are elastically pressed against the nickel sheet along the second direction through the pressing members.

2. The pressing mechanism according to claim 1, wherein, The clamping mechanism further includes a CCD positioning component, the CCD positioning component faces the two clamping members and is used to collect position information of the two clamping members along the first direction; The first driving component is electrically connected to the CCD positioning component, and is configured to drive the corresponding pressing member to move along the first direction to the corresponding tab position according to the position information.

3. The pressing mechanism according to claim 1, characterized in that, The two first drive assemblies are respectively arranged on the same side of the two pressing members along the third direction, and the two first drive assemblies are arranged along the second direction, wherein the third direction is respectively perpendicular to the first direction and the second direction.

4. The pressing mechanism according to claim 3, characterized in that, The second driving assembly is connected to a side of the first driving assembly away from the pressing member along the third direction.

5. The pressing mechanism according to claim 4, wherein The clamping mechanism also includes a housing; The two first driving components are respectively disposed through the housing along the first direction; The shell is provided with an opening on one side along the third direction, the first driving assembly extends out of the opening and is connected to the pressing member, and the shell is connected to the second driving assembly on a side away from the opening along the third direction.

6. The pressing mechanism according to claim 1, wherein The pressing member has a first end and a second end opposite to each other along the second direction, the first end is connected to an end of the elastic member away from the first driving assembly, and the second end is used to press the corresponding tab against the nickel sheet; The second end is provided with an avoidance hole which penetrates the pressing member along the second direction, and the avoidance hole is used for allowing a laser beam emitted by a laser welding mechanism to pass through so as to weld the corresponding pole ear to the nickel sheet.

7. The pressing mechanism according to claim 6, characterized in that, The battery cell further comprises a battery cell body, and the two tabs extend from the same side of the battery cell body along the third direction; The second end includes a connecting block and a pressing head, wherein the pressing head is connected to a side of the connecting block away from the elastic member along the second direction; the avoidance hole passes through the connecting block and the pressing head along the second direction; On both sides of the pressing head along the third direction, they are respectively concave relative to the connecting block to form avoidance grooves; one of the avoidance grooves is used to avoid the battery protection board, and the other avoidance groove is used to avoid the battery cell body, wherein the third direction is perpendicular to the first direction and the second direction respectively.

8. The pressing mechanism according to claim 7, wherein, The pressing member further includes an inclined connecting bar, the inclined connecting bar is connected between the first end and the connecting block, and one end of the inclined connecting bar connected to the connecting block protrudes outward away from the first driving component.

9. The pressing mechanism according to claim 1, wherein, One end of the second driving component along the second direction is connected to the first driving component; The pressing mechanism further includes a seat body, and the seat body supports one end of the second driving component away from the first driving component.

10. A welding device, characterized in that, Including: The pressing mechanism according to any one of claims 1 to 9; A laser welding mechanism for welding the two pole ears to the two nickel sheets respectively.

Images