Pole group welding tool

Abstract

The utility model relates to the technical field of batteries, and discloses a pole group welding tool which comprises a fixing seat, a welding rod, a welding rod and a welding rod. The pole group limiting assembly is arranged on the fixed seat, and the pole group limiting assembly is provided with a limiting space for limiting the periphery of the pole group; the tab fixing assembly is arranged on the fixing seat and located on one side of the pole group limiting assembly, and the tab fixing assembly is used for fixing tabs of the pole group; and one side of the flip cover assembly is rotatably connected to the fixed seat, and the flip cover assembly has an open state in which the pole group limiting assembly is not shielded and a limiting state in which the flip cover assembly is overturned to press the pole group. The tool is used for limiting the pole groups and the pole lugs, positioning of the pole groups is achieved, the problems of dislocation and slippage of pole pieces during pole lug welding are effectively solved, the tool can be suitable for fixing the pole groups without diaphragms and pole groups with diaphragms, and the application range is wide.

Description

Technical Field

[0001] This utility model relates to the field of battery welding technology, specifically to electrode assembly welding fixtures. Background Technology

[0002] Traditional liquid lithium batteries consist of a positive electrode, a negative electrode, a separator, and an electrolyte. The separator conducts ions but not electrons, separating the positive and negative electrodes and preventing short circuits. The separator also binds and fixes the electrodes. Separatorless lithium batteries, by eliminating the separator, simplify the cell structure, reduce overall cell weight, effectively improve cell space utilization and energy density, and offer superior thermal stability, electrochemical stability, and oxidation resistance of the solid electrolyte, thus enhancing safety performance and propelling battery technology towards full solid-state technology.

[0003] As a key component of separatorless lithium batteries, the electrode assembly needs to be placed in a fixture for tab welding after the cells are stacked. The integrity and alignment of the electrode assembly directly affect the welding effect. Therefore, a proper welding fixture for the electrode assembly is essential.

[0004] Currently, diaphragmless lithium batteries lack a separator to bind and fix the electrodes, leading to misalignment and slippage of the electrodes during tab welding, affecting welding results and product quality. However, traditional tab welding fixtures are suitable for fixing and welding electrode assemblies with separators. In electrode assemblies with separators, the electrodes are bound together by the separator, eliminating the need to focus on electrode misalignment and slippage. Therefore, traditional tab welding fixtures are not suitable for welding diaphragmless electrode assemblies. Utility Model Content

[0005] In view of this, the present invention provides an electrode assembly welding fixture to solve the problem that traditional electrode tab welding fixtures are not suitable for welding diaphragmless electrode assemblies.

[0006] This utility model provides a welding fixture for electrode assembly, comprising: a fixed base for supporting the electrode assembly; an electrode assembly limiting component disposed on the fixed base, the electrode assembly limiting component having a limiting space for limiting the electrode assembly around its perimeter; an electrode tab fixing component disposed on the fixed base and located on one side of the electrode assembly limiting component, the electrode tab fixing component being used to fix the electrode tabs of the electrode assembly; and a flip cover component, one side of the flip cover component being rotatably connected to the fixed base, the flip cover component having an open state that does not obstruct the electrode assembly limiting component and a limiting state that is flipped to press down on the electrode assembly.

[0007] Beneficial effects: Before placing the electrode assembly, flip the cover assembly to an open state that does not obstruct the electrode assembly limiting assembly. Then, place the electrode assembly within the limiting space. Next, flip the cover assembly to a limiting state that presses down on the electrode assembly. The electrode assembly is fixed by the flip cover assembly, and the electrode tabs are fixed by the electrode tab fixing assembly, thus achieving the fixation and restraint of the electrode assembly. After the electrode assembly is fixed, welding equipment is used to weld the electrode tabs. By limiting the electrode assembly and electrode tabs using the above tooling, the positioning of the electrode assembly is achieved, effectively solving the problem of electrode misalignment and slippage during electrode tab welding. It can be applied to the fixation of electrode assemblies with and without diaphragms, and has a wide range of applications.

[0008] In one optional embodiment, the electrode group limiting assembly includes: an electrode group pad, detachably mounted on a fixed base, wherein there are multiple electrode group pads of different thicknesses, used to support the electrode group and limit its first large surface; a first limiting member, mounted on the fixed base, used to limit a first side of the electrode group, the first side being provided with an electrode tab; a second limiting member, mounted on the electrode group pad and disposed opposite to the first limiting member, used to limit a second side of the electrode group; and a third limiting member and a fourth limiting member, disposed opposite to each other on the electrode group pad, the third limiting member used to limit a third side of the electrode group, and the fourth limiting member used to limit a fourth side of the electrode group.

[0009] Beneficial effects: The first limiting component acts as a reference, limiting the electrode tab side of the electrode assembly to prevent electrode misalignment. Four limiting components limit the four sides of the electrode assembly, ensuring accurate positioning and precise electrode post placement. By replacing the electrode backing plates of different thicknesses, welding of electrode assemblies of varying thicknesses can be achieved. The tooling is easy to change, making the welding fixture compatible with a wider range of sizes and offering good compatibility.

[0010] In one alternative implementation, the positions of the second, third, and fourth limiting members on the electrode pad are adjustable.

[0011] Beneficial effects: By adjusting the positions of the second, third, and fourth limiting components, electrode groups of different lengths and widths can be fixed, which can meet the welding needs of electrode groups of different lengths and widths, and has a wider range of applications.

[0012] In one alternative embodiment, the first limiting member includes two detachable edge blocks and a middle block, the middle block being disposed between the two edge blocks, and the edge blocks and the middle block jointly limiting the first side of the pole assembly.

[0013] Beneficial effects: The first side is the electrode tab side of the electrode assembly. The setting of the two edge blocks and the middle block can just avoid the position of the electrode tab, avoiding interference between the first limiting member and the electrode tab. The edge part of the first side is limited by the two edge blocks, and the middle part of the first side plate is limited by the middle block, which has a better limiting effect on the electrode assembly.

[0014] In one alternative embodiment, the flip cover assembly includes: a flip cover, a first side of which is rotatably connected to a fixing base, the flip cover being used to press down on and limit the second large surface of the electrode assembly; and a fifth limiting member disposed on the second side of the flip cover near the electrode tab fixing assembly, the fifth limiting member having a bending structure, one end of which is parallel to the upper surface of the electrode tab, and the other end protruding from the second side of the flip cover and perpendicular to the upper surface of the electrode tab, the bending structure being used to limit the first side of the electrode assembly and / or the upper surface of the electrode tab.

[0015] Beneficial effects: By limiting the first side of the electrode assembly and / or the upper surface of the electrode tab through the bending structure of the fifth limiting component, the height position of the first side of the electrode assembly and / or the electrode tab is limited, the positioning of the electrode assembly and / or the electrode tab is more accurate, and the welding quality of the electrode tab is improved.

[0016] In one alternative embodiment, the electrode welding fixture further includes a connecting component having a locked state that locks the flip cover onto the fixed base and an unlocked state that unlocks the flip cover.

[0017] Beneficial effects: By fixing the flip cover with the connecting components, the electrode assembly is pressed and fixed, preventing the electrode assembly from moving during welding and improving welding quality.

[0018] In one optional embodiment, the electrode fixing assembly includes: a detachably connected electrode base plate and an electrode pressure plate; the electrode base plate is disposed on a fixing seat, the top surface of the electrode base plate has a lower limiting groove for limiting the electrode, and the electrode base plate is provided with a positioning element; the electrode pressure plate can be disposed on the electrode base plate, the bottom surface of the electrode pressure plate has an upper limiting groove corresponding to the lower limiting groove, the electrode pressure plate is provided with a mating structure that cooperates with the positioning element, and the electrode pressure plate is used to press the electrode onto the electrode base plate.

[0019] Beneficial effects: By setting a lower limit groove and an upper limit groove on the electrode base plate and electrode pressure plate, the area on the electrode base plate corresponding to the lower limit groove and the area on the electrode pressure plate corresponding to the upper limit groove are both thinning areas. While pressing the electrode, it can meet the welding of electrode ears of different thicknesses, with a wide range of applications and good compatibility.

[0020] In one optional embodiment, the lower limiting groove is provided with a lower opening that penetrates the bottom plate of the electrode tab, and the upper limiting groove is provided with an upper opening that penetrates the electrode tab pressure plate and corresponds to the lower opening. The upper and lower openings are used for the passage of welding parts to weld the electrode tab.

[0021] Beneficial effects: The design of the lower and upper openings facilitates the passage of the welding parts, ensuring that the welding parts can be accurately aligned with the welding points during welding, thereby achieving the welding of the electrode tabs.

[0022] In one optional embodiment, the tab plate is detachably connected to the tab base plate via a connecting component. The connecting component includes a first magnetic component and a second magnetic component. The first magnetic component is disposed on the tab base plate, and the second magnetic component is disposed on the tab plate. After the tab plate is placed on the tab base plate, the tab plate is firmly attracted to the tab base plate by the magnetic force between the first magnetic component and the second magnetic component.

[0023] Beneficial effects: After the electrode clamping plate presses down on the electrode, the connecting parts completely fit the electrode clamping plate and the electrode base plate, resulting in better electrode clamping effect and thus improving the welding quality when welding electrode.

[0024] In one alternative embodiment, the flip cover assembly has a first handle, and / or the tab fixing assembly has a second handle.

[0025] Beneficial effects: The first handle is designed to be easy for the operator to grip, thus facilitating the opening or closing of the flip cover assembly; the second handle is designed to be easy for the operator to grip, thus facilitating the removal and placement of the electrode fixing assembly. Attached Figure Description

[0026] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 This is a perspective view of a welding fixture for electrode assembly according to an embodiment of the present utility model;

[0028] Figure 2 for Figure 1 A perspective view of the fixed base and the first limiting member shown;

[0029] Figure 3 for Figure 1 A partial perspective view of the pole group limiting assembly shown;

[0030] Figure 4 for Figure 1 A 3D view of the flip-top assembly shown;

[0031] Figure 5 for Figure 1 A partially exploded view of the tab fixing assembly shown;

[0032] Figure 6 for Figure 5 A three-dimensional view showing the tab base plate and the tab base plate separated from each other, viewed from a bottom angle;

[0033] Figure 7 for Figure 1 The 3D view of the electrode welding fixture shown has the flip-top assembly removed;

[0034] Figure 8 for Figure 1 The electrode welding fixture shown is a three-dimensional view from another perspective.

[0035] Explanation of reference numerals in the attached figures:

[0036] 1. Fixing base; 101. Fixing base plate; 1011. First bolt hole; 1012. Fixing hole; 1013. Mounting hole; 102. First side plate; 103. Second side plate; 104. Third side plate; 105. Fourth side plate; 106. Support bar; 107. Guide sleeve;

[0037] 2. Pole group limiting assembly; 201. First limiting component; 2011. Edge stop; 2012. Middle stop; 202. Second limiting component; 203. Third limiting component; 204. Fourth limiting component; 205. Pole group pad; 2051. Second bolt hole;

[0038] 3. Electrode fixing assembly; 301. Electrode base plate; 3011. Lower limit groove; 3012. Lower opening; 302. Electrode pressure plate; 3021. Upper limit groove; 3022. Upper opening; 303. Positioning component; 304. Mating structure; 305. First magnetic component; 306. Second magnetic component; 307. Second handle;

[0039] 4. Flip-top assembly; 401. Flip-top; 402. Fifth limiting component; 4021. Bending structure; 403. First handle; 404. Rotating block; 405. Rotating shaft;

[0040] 6. Connecting components;

[0041] 7. Electrode group; 701. Electrode tab. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0043] The following is combined with Figures 1 to 8 The following describes embodiments of the present invention.

[0044] According to an embodiment of the present invention, a welding fixture for electrode assembly is provided, comprising: a fixed base 1, an electrode assembly limiting component 2, an electrode ear fixing component 3, and a flip-top component 4. The fixed base 1 is used to support the electrode assembly 7. The electrode assembly limiting component 2 is disposed on the fixed base 1 and has a limiting space for limiting the electrode assembly 7 around its perimeter. The electrode ear fixing component 3 is disposed on the fixed base 1 and located on one side of the electrode assembly limiting component 2, and is used to fix the electrode ear 701 of the electrode assembly 7. One side of the flip-top component 4 is rotatably connected to the fixed base 1, and the flip-top component 4 has an open state that does not cover the electrode assembly limiting component 2 and a limiting state that is flipped to press down on the electrode assembly 7.

[0045] Using the electrode assembly welding fixture of this embodiment, before placing the electrode assembly 7, the flip-top assembly 4 is flipped to an open state that does not obstruct the electrode assembly limiting assembly 2. Then, the electrode assembly 7 is placed in the limiting space, and then the flip-top assembly 4 is flipped to a limiting state that presses down on the electrode assembly 7. The electrode assembly 7 is fixed by the flip-top assembly 4, and the electrode tab 701 is fixed by the electrode tab fixing assembly 3, thus achieving the fixation and restraint of the electrode assembly 7. After the electrode assembly 7 is fixed, the electrode tab 701 of the electrode assembly 7 is welded using welding equipment. By limiting the electrode assembly 7 and the electrode tab 701 through the above fixture, the positioning of the electrode assembly 7 is achieved, effectively solving the problem of electrode misalignment and slippage during electrode tab 701 welding. It can be applied to the fixation of electrode 7 with and without diaphragms, and has a wide range of applications.

[0046] In one embodiment, the electrode group limiting assembly 2 includes: an electrode group pad 205, a first limiting member 201, a second limiting member 202, a third limiting member 203, and a fourth limiting member 204. The electrode group pad 205 is detachably mounted on the fixed base 1. Multiple electrode group pads 205 of varying thicknesses are used to support the electrode group 7 and limit its first large surface. The first limiting member 201 is mounted on the fixed base 1 and limits the first side of the electrode group 7, where an electrode tab 701 is provided. The second limiting member 202 is mounted on the electrode group pad 205 and opposite to the first limiting member 201, limiting the second side of the electrode group 7. The third limiting member 203 and the fourth limiting member 204 are opposite to each other on the electrode group pad 205, limiting the third side of the electrode group 7 and the fourth limiting member 204. The first limiting component 201 serves as a reference to limit the tab side of the electrode group 7, preventing electrode misalignment. Four limiting components limit the four sides of the electrode group 7, ensuring accurate positioning and precise positioning of the electrode post. By replacing the electrode pads 205 with different thicknesses, welding of electrode groups 7 of varying thicknesses is possible. The tooling is easy to change, making the welding fixture compatible with a wider range of sizes and offering good compatibility.

[0047] Furthermore, such as Figure 2 and Figure 3As shown, the electrode pad 205 is fixed to the mounting base 1 by fasteners such as bolts or screws. The mounting base 1 has a first bolt hole 1011, and the electrode pad 205 has a second bolt hole 2051. Fasteners pass through the first bolt hole 1011 and connect to the second bolt hole 2051. The mounting base 1 and the electrode limiting assembly 2 adopt a split design. The electrode limiting assembly 2 is detachable, and different sizes of electrode limiting assemblies 2 can be fixed through different bolt holes according to the size of the electrode group 7, thus providing wide compatibility.

[0048] In one embodiment, such as Figure 3 As shown, the positions of the second limiting member 202, the third limiting member 203, and the fourth limiting member 204 on the electrode assembly pad 205 are adjustable. By adjusting the positions of the second limiting member 202, the third limiting member 203, and the fourth limiting member 204, electrode assemblies 7 of different lengths and widths can be fixed, which can meet the welding requirements of electrode assemblies 7 of different lengths and widths, and has a wider range of applications.

[0049] Furthermore, the electrode pad 205 is provided with a plurality of transverse threaded holes and a plurality of longitudinal threaded holes. The plurality of transverse threaded holes are arranged along the arrangement direction of the first limiting member 201 and the second limiting member 202, and the plurality of longitudinal threaded holes are arranged along the arrangement direction of the third limiting member 203 and the fourth limiting member 204. The position of the second limiting member 202 is adjusted by fixing the third limiting member 203 to different transverse threaded holes, and the position of the third limiting member 203 and the fourth limiting member 204 is adjusted by fixing the third limiting member 203 and the fourth limiting member 204 to different longitudinal threaded holes. The second limiting member 202, the third limiting member 203 and the fourth limiting member 204 are all fixed to the corresponding threaded holes by fasteners such as bolts or screws, which facilitates the rapid adjustment of the second limiting member 202, the third limiting member 203 and the fourth limiting member 204.

[0050] Specifically, the second limiting member 202, the third limiting member 203 and the fourth limiting member 204 are all pole group stops. The pole group stops play a role in clamping and limiting the pole group 7 to prevent the pole pieces from being misaligned. The position of the pole group stops is adjustable to meet the welding requirements of pole groups 7 with different lengths and widths.

[0051] Furthermore, a protective layer is provided on the side of the electrode assembly baffle that contacts the electrode assembly 7. This protective layer protects the side of the electrode assembly 7 and prevents damage to the edge of the electrode sheet. The protective layer is a Teflon coating or similar material.

[0052] It is understood that in another embodiment, the electrode pad 205 is provided with transverse strip holes and longitudinal strip holes. In this case, the position of the corresponding limiting member is adjusted by adjusting the position of the fastener in the strip hole.

[0053] In one embodiment, such as Figure 2As shown, the first limiting member 201 includes two detachable edge blocks 2011 and a middle block 2012. The middle block 2012 is disposed between the two edge blocks 2011. The edge blocks 2011 and the middle block 2012 together limit the first side of the electrode assembly 7. The first side is the tab side of the electrode assembly 7. The arrangement of the two edge blocks 2011 and the middle block 2012 can precisely avoid the position of the tab 701, preventing interference between the first limiting member 201 and the tab 701. The two edge blocks 2011 limit the edge portion of the first side, and the middle block 2012 limits the middle portion of the first side plate 102, resulting in a better limiting effect on the electrode assembly 7. Furthermore, the two edge blocks 2011 are replaceable, and different lengths can be replaced according to different models of electrode assemblies 7 to meet the welding requirements of different models of electrode assemblies 7, thus broadening the application range.

[0054] Furthermore, the position of the intermediate stop 2012 is adjustable. The intermediate stop 2012 cooperates with the two edge stops 2011 to achieve a three-point alignment, ensuring the parallel positioning of the first side of the electrode group 7, thereby improving the welding quality of the electrode tab.

[0055] Specifically, the intermediate stop 2012 has insulating properties and can also prevent short circuits between the positive and negative electrodes, thus improving battery safety.

[0056] It is understood that, in another embodiment, the intermediate stop 2012 may not be provided.

[0057] In one embodiment, such as Figure 4 As shown, the flip cover assembly 4 includes a flip cover 401 and a fifth limiting member 402. The first side of the flip cover 401 is rotatably connected to the fixing base 1. The flip cover 401 is used to press down on the electrode group 7 and limit the second large surface of the electrode group 7. The fifth limiting member 402 is disposed on the second side of the flip cover 401 near the electrode tab fixing assembly 3. The fifth limiting member 402 has a bending structure 4021. One end of the bending structure is parallel to the upper surface of the electrode tab 701, and the other end protrudes from the second side of the flip cover 401 and is perpendicular to the upper surface of the electrode tab 701. The bending structure 4021 is used to limit the first side of the electrode group 7 and / or the upper surface of the electrode tab 701. The bending structure 4021 of the fifth limiting member 402 limits the first side of the pole group 7 and / or the upper surface of the pole tab 701, thereby limiting the height position of the first side of the pole group 7 and / or the pole tab 701, making the positioning of the pole group 7 and / or the pole tab 701 more accurate and improving the welding quality of the pole tab 701.

[0058] Furthermore, a rotating block 404 is provided on the first side of the flip cover 401. The rotating block 404 is rotatably connected to the fixed base 1 through the rotating shaft 405, which makes it time-saving and labor-saving when the flip cover 401 is flipped, reducing the labor intensity of the operator.

[0059] In one embodiment, the electrode assembly welding fixture further includes a connecting component 6, which has a locked state that locks the flip cover 401 onto the fixed base 1 and an unlocked state that unlocks the flip cover 401. By fixing the flip cover 401 with the connecting component 6, the electrode assembly 7 is pressed and fixed, preventing the electrode assembly 7 from moving during welding and improving the welding quality.

[0060] Furthermore, the connecting component 6 is a latch, which is simple to operate and allows for quick and convenient installation and removal. Specifically, the flip cover 401 is connected to the third side opposite the first side and the fixing base 1 via a latch. The latch includes a latch ring and a latch hook, with the latch hook fixed on the flip cover 401 and the latch ring set on the fixing base 1.

[0061] It is understandable that the connecting component 6 can also be other devices that connect two parts, and is not limited to this.

[0062] In one embodiment, such as Figure 5 and Figure 6 As shown, the tab fixing assembly 3 includes: a detachably connected tab base plate 301 and a tab pressure plate 302. The tab base plate 301 is mounted on the fixing seat 1. The top surface of the tab base plate 301 has a lower limiting groove 3011 for limiting the tab 701. The tab base plate 301 is provided with a positioning element 303. The tab pressure plate 302 can be placed on the tab base plate 301. The bottom surface of the tab pressure plate 302 has an upper limiting groove 3021 corresponding to the lower limiting groove 3011. The tab pressure plate 302 is provided with a mating structure 304 that cooperates with the positioning element 303. The tab pressure plate 302 is used to press the tab 701 onto the tab base plate 301. By setting a lower limiting groove 3011 and an upper limiting groove 3021 on the electrode base plate 301 and the electrode pressure plate 302, the area on the electrode base plate 301 corresponding to the lower limiting groove 3011 and the area on the electrode pressure plate 302 corresponding to the upper limiting groove 3021 are both thinning areas. While pressing the electrode 701, it can meet the welding of electrode 701 with different thicknesses, with a wide range of applications and good compatibility.

[0063] When the tab pressure plate 302 presses down on the tab base plate 301, the tab base plate 301 and the tab pressure plate 302 are positioned by the positioning component 303 and the mating structure 304 to prevent misalignment.

[0064] Furthermore, the lower limiting groove 3011 has a lower opening 3012 that penetrates the tab base plate 301, and the upper limiting groove 3021 has an upper opening 3022 that penetrates the tab pressure plate 302 and corresponds to the lower opening 3012. The upper opening 3022 and the lower opening 3012 are used for the passage of welding parts to weld the tab 701. The lower opening 3012 and the upper opening 3022 facilitate the passage of welding parts and ensure that the welding parts can be accurately aligned with the weld points when welding the tab 701, thereby realizing the welding of the tab.

[0065] Furthermore, the positioning element 303 is a positioning pin, and the mating structure 304 is a mating hole. The positioning pin and the mating hole are used to position the electrode tab pressure plate 302, thereby preventing the electrode tab pressure plate 302 from being misaligned.

[0066] It is understood that in another embodiment, the positioning element 303 is a positioning hole and the mating structure 304 is a mating pin.

[0067] It should be noted that the fifth limiting component 402 limits the upper surface of the electrode tab 701 to prevent the electrode tab 701 from warping or bending. There is a gap between one end of the bending structure 4021 and the electrode tab base plate 301, and the gap is 1.5mm-2mm.

[0068] In one embodiment, the tab clamping plate 302 is connected to the tab base plate 301 via a connecting component. After the tab clamping plate 302 presses down on the tab 701, the connecting component completely fits the tab clamping plate 302 and the tab base plate 301 together, resulting in a better clamping effect on the tab 701 and thus improving the welding quality when welding the tab 701.

[0069] Furthermore, the connecting component includes a first magnetic element 305 and a second magnetic element 306. The first magnetic element 305 is disposed on the tab base plate 301, and the second magnetic element 306 is disposed on the tab pressure plate 302. After the tab pressure plate 302 is placed on the tab base plate 301, the tab pressure plate 302 is firmly attracted to the tab base plate 301 by the magnetic force between the first magnetic element 305 and the second magnetic element 306, preventing the tab pressure plate 302 and the tab base plate 301 from moving during welding. Furthermore, placing the tab pressure plate 302 behind the tab base plate 301 automatically clamps the tab 701, eliminating the need for manual operation of the connecting component, making operation simple and labor-saving.

[0070] Specifically, both the first magnetic component 305 and the second magnetic component 306 are magnets or the like.

[0071] In one embodiment, such as Figure 4 As shown, the flip cover assembly 4 is provided with a first handle 403. The first handle 403 is designed to be easy for the operator to grip, thereby facilitating the opening or closing of the flip cover assembly.

[0072] Furthermore, the first handle 403 is made of stainless steel or similar materials. The surface of the first handle 403 is smooth, without any protruding hardware, conforms to an ergonomic grip, and is fixed with bolts for easy use and maintenance. Specifically, the first handle 403 is located on the side of the flip cover 401 opposite to the fixed base 1.

[0073] In one embodiment, such as Figure 5As shown, the tab fixing assembly 3 is provided with a second handle 307. The second handle 307 is designed to facilitate the operator's grip, thereby making it easier to pick up and put down the tab fixing assembly 3.

[0074] Furthermore, the second handle 307 is made of stainless steel or similar materials. The surface of the second handle 307 is smooth, without any protruding hardware, conforms to an ergonomic grip, and is fixed with bolts for easy use and maintenance. Specifically, the second handle 307 is located on the side of the tab pressure plate 302 opposite to the tab base plate 301, facilitating the removal and placement of the tab pressure plate 302.

[0075] In one embodiment, such as Figure 2 As shown, the fixing base 1 includes a fixing base plate 101, a first side plate 102, a second side plate 103, a third side plate 104, and a fourth side plate 105. The first side plate 102 and the second side plate 103 are fixedly fixed to the first side of the fixing base plate 101 at intervals, and the third side plate 104 and the fourth side plate 105 are fixedly fixed to the second side of the fixing base plate 101 at intervals. The first side and the second side are arranged opposite to each other. One end of the rotating shaft 405 is connected to the first side plate 102, and the other end of the rotating shaft 405 is connected to the second side plate 103. An edge stop 2011 is fixed on the first side plate 102, and another edge stop 2011 is fixed on the third side plate 104. The third side plate 104 and the fourth side plate 105 are provided with interlocking rings. The second side plate 103 and the fourth side plate 105 are L-shaped, etc.

[0076] Furthermore, the fixed base plate 101 is provided with multiple support bars 106 on the side facing the tab fixing assembly 3. The tab base plate 301 is fixed on the multiple support bars 106, and the middle stop block 2012 is fixed on one of the middle support bars 106. At this time, the position of the middle stop block 2012 on the support bar 106 is adjustable, which makes it convenient to adjust the position of the middle stop block 2012.

[0077] Specifically, such as Figure 8 As shown, a guide sleeve 107 is fixedly mounted on the fixed base plate 101. The guide sleeve 107 is used to cooperate with the guide rod. The welding fixture is used to install onto the platform. The platform of the automatic equipment is movable, and the welding fixture can move with the platform. The platform of the manual equipment is fixed. There are two guide sleeves 107. The double guide sleeve design guides the pole group 7, which can achieve precise positioning of the fixed seat 1.

[0078] Furthermore, such as Figure 2 and Figure 7 As shown, the fixed base plate 101 is provided with a fixing hole 1012 for fixing the guide sleeve 107 and a mounting hole 1013 that mates with the guide sleeve 107. Fasteners pass through the guide sleeve 107 and are threadedly connected to the fixing hole 1012. Part of the guide sleeve 107 is located in the mounting hole 1013.

[0079] In related technologies, traditional tab welding fixtures are suitable for the fixed welding of electrode assemblies with diaphragms. In electrode assemblies with diaphragms, the electrode pieces are bound together by the diaphragm, so there is no need to focus on the issue of electrode misalignment or slippage. Furthermore, the dimensions of traditional tab welding fixtures are not adjustable or have a limited adjustment range. Changing to different battery models requires changing the fixture, resulting in poor compatibility and cumbersome fixture replacement.

[0080] In this embodiment, the electrode welding fixture includes a fixed base 1, an electrode limiting component 2, an electrode ear fixing component 3, and a flip cover component 4. The fixed base 1 and the flip cover component 4 are connected by a pivot 405 and a snap fastener. The electrode limiting component 2 is fixed to the fixed base 1 with bolts. The electrode limiting component 2 includes an electrode pad 205 and an electrode stop bar. The position of the electrode stop bar can be adjusted according to the size of the electrode group 7. The electrode ear fixing component 3 includes an electrode ear base plate 301 and an electrode ear pressure plate 302. The electrode ear base plate 301 is fixed on the fixed base 1, and the electrode ear pressure plate 302 can be attracted to the electrode ear base plate 301 by a magnet.

[0081] The following describes the usage process of the electrode welding fixture:

[0082] Loosen the two latches and pull the first handle 403 to quickly flip the flip cover assembly 4;

[0083] Remove the tab pressure plate 302 using the second handle 307 of the tab fixing assembly 3;

[0084] Adjust the positions of the three pole group baffles according to the size of the pole group 7, then place the pole group 7 to be welded, and then adjust the pole group baffles so that they can clamp the pole group 7 in the width and height directions, and tighten the pole group baffles with bolts.

[0085] Place the tab pressure plate 302 to press the tab 701 tightly;

[0086] Pull the first handle 403 to flip the flip cover assembly 4 so that it presses against the electrode group 7, locks the two tower buckles, and begins welding the electrode group 7.

[0087] The aforementioned electrode assembly welding fixture solves the problems of electrode misalignment and slippage during electrode tab welding. It is easy to adjust for different types, has a simple structure, and wide compatibility. It can weld electrode assemblies for lithium batteries of different sizes, ensuring battery alignment and improving first-pass yield. It also reduces potential hazards caused by human error during electrode assembly transportation, such as short circuits and damage. The adjustable electrode assembly baffles have a wide adjustment range and are compatible with more sizes. The buckle and handle design are simple in structure, easy to lock and open, and simple to handle. The fixture can weld electrode assemblies without separators, and is also compatible with welding with separators. It is suitable for multiple types, models, and sizes of lithium batteries, meeting the needs of lithium battery factory experimental and mass production lines.

[0088] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A welding fixture for electrode groups, characterized in that, include: A mounting base (1) is used to support the pole group (7); A pole group limiting component (2) is disposed on the fixed base (1), and the pole group limiting component (2) has a limiting space for limiting the pole group (7) around its perimeter; A tab fixing assembly (3) is disposed on the fixing base (1) and located on one side of the pole group limiting assembly (2). The tab fixing assembly (3) is used to fix the tabs (701) of the pole group (7). A flip cover assembly (4) is rotatably connected to the fixed base (1) on one side. The flip cover assembly (4) has an open state in which the pole group limiting assembly (2) is not covered and a limiting state in which it is flipped to press down the pole group (7).

2. The electrode assembly welding fixture according to claim 1, characterized in that, The pole group limiting component (2) includes: The electrode pad (205) is detachably mounted on the fixed base (1). There are multiple electrode pads (205) with different thicknesses, which are used to support the electrode group (7) and limit the first large surface of the electrode group (7). A first limiting member (201) is disposed on the fixed base (1). The first limiting member (201) is used to limit the first side of the pole group (7). The first side is provided with the pole tab (701). The second limiting member (202) is disposed on the electrode pad (205) and is disposed opposite to the first limiting member (201). The second limiting member (202) is used to limit the second side of the electrode group (7). The third limiting member (203) and the fourth limiting member (204) are disposed opposite to each other on the electrode pad (205). The third limiting member (203) is used to limit the third side of the electrode group (7), and the fourth limiting member (204) is used to limit the fourth side of the electrode group (7).

3. The electrode assembly welding fixture according to claim 2, characterized in that, The positions of the second limiting member (202), the third limiting member (203), and the fourth limiting member (204) on the pole assembly pad (205) are adjustable.

4. The electrode assembly welding fixture according to claim 2, characterized in that, The first limiting member (201) includes two detachable edge blocks (2011) and a middle block (2012). The middle block (2012) is disposed between the two edge blocks (2011). The edge blocks (2011) and the middle block (2012) together limit the first side of the pole group (7).

5. The electrode assembly welding fixture according to any one of claims 1 to 4, characterized in that, The flip-top assembly (4) includes: A flip cover (401) is rotatably connected on its first side to the fixed base (1). The flip cover (401) is used to press down on the pole group (7) and limit the second large surface of the pole group (7). A fifth limiting member (402) is disposed on the second side of the flip cover (401) near the electrode fixing assembly (3). The fifth limiting member (402) has a bending structure (4021). One end of the bending structure is parallel to the upper surface of the electrode (701), and the other end protrudes from the second side of the flip cover (401) and is perpendicular to the upper surface of the electrode (701). The bending structure (4021) is used to limit the first side of the electrode assembly (7) and / or the upper surface of the electrode (701).

6. The electrode assembly welding fixture according to claim 5, characterized in that, The electrode welding fixture also includes a connecting component (6), which has a locked state that locks the flip cover (401) onto the fixed base (1) and an unlocked state that unlocks the flip cover (401).

7. The electrode welding fixture according to any one of claims 1 to 4, characterized in that, The electrode fixing assembly (3) includes a detachably connected electrode base plate (301) and electrode pressure plate (302); The electrode base plate (301) is disposed on the fixed base (1), and the top surface of the electrode base plate (301) has a lower limiting groove (3011) for limiting the electrode (701), and the electrode base plate (301) is provided with a positioning element (303); The electrode clamping plate (302) can be covered on the electrode base plate (301). The bottom surface of the electrode clamping plate (302) has an upper limit groove (3021) corresponding to the lower limit groove (3011). The electrode clamping plate (302) is provided with a mating structure (304) that cooperates with the positioning member (303). The electrode clamping plate (302) is used to press the electrode (701) tightly on the electrode base plate (301).

8. The electrode assembly welding fixture according to claim 7, characterized in that, The lower limiting groove (3011) is provided with a lower opening (3012) that penetrates the bottom plate (301) of the electrode tab, and the upper limiting groove (3021) is provided with an upper opening (3022) that penetrates the electrode tab pressure plate (302) and corresponds to the lower opening (3012). The upper opening (3022) and the lower opening (3012) are used for the passage of welding parts to weld the electrode tab (701).

9. The electrode assembly welding fixture according to claim 7, characterized in that, The tab plate (302) is detachably connected to the tab base plate (301) via a connecting component. The connecting component includes a first magnetic element (305) and a second magnetic element (306). The first magnetic element (305) is disposed on the tab base plate (301), and the second magnetic element (306) is disposed on the tab plate (302). After the tab plate (302) is placed on the tab base plate (301), the tab plate (302) is firmly attracted to the tab base plate (301) by the magnetic force between the first magnetic element (305) and the second magnetic element (306).

10. The electrode assembly welding fixture according to claim 1, characterized in that, The flip cover assembly (4) is provided with a first handle (403), and / or the electrode fixing assembly (3) is provided with a second handle (307).

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