Battery welding conveying device, conveying method and battery welding equipment

Abstract

The present invention provides a battery welding conveying device, a welding conveying method and a battery welding device, wherein the battery welding conveying device includes a base, a stepping platform, a fixed platform, a connecting platform and a conveyor belt, wherein: the stepping platform is movably connected to the base; the fixed platform is fixedly connected to the base; the connecting platform is configured to connect the stepping platform and the fixed platform; the conveyor belt is supported on the stepping platform, the connecting platform and the fixed platform; the stepping platform is configured to be able to step toward or away from the fixed platform; when the stepping platform steps toward the fixed platform, the connecting platform is configured to shrink toward the middle or hide under the stepping platform in sections; when the stepping platform steps away from the fixed platform, the connecting platform is configured to expand toward both ends or be exposed in sections between the stepping platform and the fixed platform. During the feeding process of the present invention, the conveyor belt does not need to step toward the welding station, and the battery cells can be continuously and sequentially fed onto the conveyor belt.

Description

Technical Field

[0001] The invention relates to the field of solar cell panel manufacturing, and in particular to a battery welding conveying device, a welding conveying method and a battery welding equipment. Background Art

[0002] The cell welding process is an important process in the production of solar panels. During the welding process, the cell loading device places a predetermined number of cells on the welding conveyor device in sequence, and the welding conveyor device transports the cells to the welding station. Finally, the welding device welds the predetermined number of cells into a cell string.

[0003] The traditional welding conveyor device only includes a welding platform with a conveyor belt mounted on it. The conveyor belt is driven by a stepper motor. In order to ensure that the loading position on the conveyor belt near the loading device remains vacant to place the next battery cell, the stepper motor must drive the conveyor belt to step toward the welding station once after the loading device places the current battery cell at the loading position. The distance of each step is roughly the width of a battery cell. The welding device waits until the predetermined number of battery cells have all arrived at the welding station before performing the welding action, thereby welding the predetermined number of battery cells into a battery string.

[0004] The traditional welding conveying device has the following technical problems: the battery cells that arrive at the welding station first need to wait for the battery cells that arrive later. The heating time of the battery cells that arrive first is significantly longer than that of the battery cells that arrive later. The heating difference between the battery cells leads to poor welding effect. Summary of the invention

[0005] In view of the above technical problems existing in the prior art, the first aspect of the present invention provides a battery welding conveying device, and its technical solution is as follows:

[0006] A battery welding conveying device, the battery welding conveying device comprises a base, a stepping platform, a fixed platform, a connecting platform and a conveyor belt, wherein:

[0007] The stepping platform is movably connected to the base;

[0008] The fixed platform is fixedly connected to the base, and a welding station is formed on the fixed platform;

[0009] The connecting platform is configured to connect the stepping platform and the fixed platform;

[0010] The conveyor belt is supported on the stepping platform, the connecting platform and the fixed platform, and a predetermined number of battery cells are sequentially loaded onto the conveyor belt located on the stepping platform, and the conveyor belt is configured to step and convey the predetermined number of battery cells to the welding station;

[0011] The stepping platform is configured to be able to step toward or away from the fixed platform, and each time i battery cells are loaded onto the conveyor belt, the stepping platform steps away from the fixed platform by a predetermined distance until a predetermined number of battery cells are all loaded onto the conveyor belt, wherein i is a natural number greater than 0 and less than a value corresponding to the predetermined number;

[0012] When the stepping platform steps toward the fixed platform, the connecting platform is configured to shrink toward the middle or be hidden under the stepping platform in sections to shorten the conveyor belt supporting surface of the connecting platform; when the stepping platform steps away from the fixed platform, the connecting platform is configured to expand toward both ends or be exposed between the stepping platform and the fixed platform in sections to extend the conveyor belt supporting surface of the connecting platform.

[0013] By setting up a stepping platform, during the loading process, the conveyor belt does not need to step toward the welding station, and a predetermined number of battery cells can be continuously and sequentially loaded to the loading position on the conveyor belt, so that the conveyor belt can synchronously step the predetermined number of battery cells loaded on it to the welding station, ultimately ensuring the heating consistency of each battery cell and improving the welding effect. In addition, by setting up a connecting platform, during the movement of the stepping platform, the conveyor belt support surface is always maintained between the fixed platform and the stepping platform, thereby preventing the conveyor belt from sinking.

[0014] In some embodiments, the connecting platform includes: a slide rail arranged on a base along the conveying direction of the conveyor belt; an articulated telescopic frame connected at both ends to the stepping platform and the fixed platform respectively; a plurality of adsorption blocks arranged along the conveying direction of the conveyor belt, the adsorption blocks are arranged on the articulated telescopic frame and are slidably connected to the slide rail, and the upper surfaces of the plurality of adsorption blocks constitute the conveyor belt supporting surface of the connecting platform; when the stepping platform steps toward the fixed platform, the articulated telescopic frame contracts toward the middle to drive the plurality of adsorption blocks to move inward; when the stepping platform steps away from the fixed platform, the articulated telescopic frame expands to both ends to drive the plurality of adsorption blocks to separate toward both ends.

[0015] A connecting platform structure is provided which can be retracted toward the middle or expanded toward both ends, thereby ensuring that a conveyor belt support surface is always maintained between the fixed platform and the stepping platform during the movement of the stepping platform, thereby preventing the conveyor belt from sinking.

[0016] In some embodiments, the slide rails are provided in two groups, and the two groups of slide rails are respectively provided at the two side edges of the base, and the two ends of each adsorption block are respectively slidably connected to a group of slide rails via a sliding connection block, and adsorption holes are provided on the adsorption block.

[0017] By setting two sets of slide rails and sliding connection blocks, the two ends of the adsorption block are slidably connected to the slide rails. By setting adsorption holes on the adsorption block, the positioning function of the connection platform can be achieved. The connection platform adsorbs the battery cell tightly to the conveyor belt through the adsorption holes on the conveyor belt.

[0018] In some embodiments, the connection platform includes: two groups of guide grooves connected to the stepping platform along the conveying direction of the conveyor belt, the guide groove includes a first horizontal groove section located at a first height, a second horizontal groove section located at a second height, and an inclined groove section connecting the first horizontal groove section and the second horizontal groove section, the second height is higher than the first height, the first horizontal groove section is hidden under the stepping platform, and the inclined groove section and the second horizontal groove section extend toward the fixed platform and expose the stepping platform. A plurality of adsorption blocks are arranged along the conveying direction of the conveyor belt, the adsorption blocks are floatingly supported on the base via vertical telescopic rods, and the adsorption blocks are slidably connected to a group of guide grooves via mounting parts on both sides, wherein: the upper surface of each adsorption block slidably connected to the second horizontal groove section of the guide groove constitutes the conveyor belt support surface of the connection platform, and each adsorption block slidably connected to the first horizontal groove section of the guide groove is hidden under the stepping platform. When the stepping platform steps toward the fixed platform, the adsorption blocks slidably connected to the second horizontal slot section descend one by one along the inclined slot section and connect to the first horizontal slot section; when the stepping platform steps away from the fixed platform, the adsorption blocks slidably connected to the first horizontal slot section rise one by one along the inclined slot section and connect to the second horizontal slot section.

[0019] The invention provides a connecting platform structure which can be hidden under the stepping platform or exposed between the stepping platform and the fixed platform in sections, thereby ensuring that a conveyor belt support surface is always maintained between the fixed platform and the stepping platform during the movement of the stepping platform, thereby preventing the conveyor belt from sinking.

[0020] In some embodiments, the mounting portion includes a vertical connecting rod connected to the adsorption block and a roller disposed at the lower end of the connecting rod, and the roller is assembled in the guide groove.

[0021] By arranging the connecting rod and the roller, the sliding connection between the two ends of the adsorption block and the guide groove is realized.

[0022] In some embodiments, the battery welding conveying device further includes a stepping platform driving mechanism for driving the stepping platform to step, the stepping platform driving mechanism is disposed on the base, and a driving end of the stepping platform driving mechanism is connected to the stepping platform.

[0023] By setting up a stepping platform driving mechanism, stepping driving of the stepping platform is realized.

[0024] In some embodiments, the battery welding conveying device also includes a conveyor belt driving mechanism for driving the conveyor belt to step and transport, and the conveyor belt driving mechanism includes a main driving roller, a tensioning roller, a first guide roller and a second guide roller, wherein: the main driving roller is arranged at the end of the fixed platform away from the stepping platform, the tensioning roller is slidably connected to the bottom of the base and can move toward or away from the fixed platform in the conveying direction of the conveyor belt, the first guide roller is connected to the bottom of the stepping platform and is located above the tensioning roller, and the second guide roller is connected to the end of the stepping platform away from the fixed platform; the conveyor belt is installed on the main driving roller, the first guide roller and the second guide roller and is tensioned by the tensioning roller.

[0025] A conveyor belt driving mechanism is provided, which realizes the installation and step-by-step driving of the conveyor belt. In addition, by arranging a tensioning roller in the conveyor belt driving mechanism, the conveyor belt can be tensioned.

[0026] In some embodiments, grooves are provided on both sides of the stepping platform and the fixed platform, and magnetic suction parts are provided in the grooves.

[0027] During the welding process, after placing the welding tape on the conveyor belt, you need to use iron tooling to press the welding tape onto the conveyor belt. However, during the stepping of the conveyor belt, the tooling may slip and deviate from the welding tape. By providing grooves on both sides of the stepping platform and the fixed platform, and providing magnetic suction parts in the grooves, the tooling can be adsorbed and pressed onto the conveyor belt to prevent the tooling from slipping and deviating from the welding tape.

[0028] A second aspect of the present invention provides a battery welding conveying method, comprising:

[0029] Load i battery cells onto the conveyor belt on the stepping platform, where i is a natural number greater than 0;

[0030] Controlling the stepping platform to step a predetermined distance in a direction away from the fixed platform;

[0031] When the number of battery cells on the conveyor belt on the stepping platform reaches a predetermined number, the stepping platform is controlled to step toward the fixed platform until it reaches a position close to the fixed platform;

[0032] The conveyor belt is controlled to convey a predetermined number of battery cells toward the welding station.

[0033] In the battery welding conveying method of the present invention, the conveyor belt does not need to step toward the welding station, and a predetermined number of battery cells can be continuously and sequentially loaded to the loading position on the conveyor belt, so that the conveyor belt can synchronously step the predetermined number of battery cells loaded thereon to the welding station, ultimately ensuring the heating consistency of each battery cell and improving the welding effect.

[0034] A third aspect of the present invention provides a battery welding device, which includes a welding conveying device, a battery cell feeding device, a welding strip feeding device and a welding device, wherein:

[0035] The cell feeding device feeds the cell to the welding conveyor device, and the solder strip feeding device feeds the solder strip to the welding conveyor device. The cell feeding device and the solder strip feeding device feed the soldering conveyor device in sequence, so that the cell and the solder strip on the welding conveyor device are stacked;

[0036] The welding conveyor device conveys the stacked battery cells and welding strips to the welding station, and the welding conveyor device adopts the battery welding conveyor device provided by the first aspect of the present invention;

[0037] The welding device welds the battery cells and welding ribbons at the welding station to form a battery string.

[0038] Through the cooperation of the welding conveying device, the battery cell feeding device, the soldering strip feeding device and the welding device, the battery welding equipment of the present invention can realize automatic feeding of battery cells and soldering strips and automatic welding of battery cells.

[0039] In addition, by optimizing the setting of the welding conveyor device, during the loading process, the conveyor belt does not need to step toward the welding station, and a predetermined number of battery cells can be continuously and sequentially loaded onto the conveyor belt, so that the welding conveyor device can synchronously step the battery cells loaded thereon to the welding station, ultimately ensuring the heating consistency of each battery cell and improving the welding effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a structural schematic diagram of the battery welding conveying device of the present invention in a working state;

[0041] Figure 2 It is a structural schematic diagram of the battery welding conveying device of the present invention in another working state;

[0042] Figure 3 It is a structural schematic diagram of the connection platform in the first embodiment of the present invention in a three-dimensional perspective;

[0043] Figure 4 is a schematic structural diagram of the connection platform in the first embodiment of the present invention from a top view;

[0044] Figure 5 It is a schematic structural diagram of the connection platform in the first embodiment of the present invention when viewed from an upward perspective;

[0045] Figure 6 It is a schematic structural diagram of a connection platform in a second embodiment of the present invention in a working state;

[0046] Figure 7 It is a schematic structural diagram of the connection platform in the second embodiment of the present invention in another working state;

[0047] Figure 8 It is a schematic diagram of the assembly of the adsorption block and the guide groove in the connection platform in the second embodiment of the present invention. DETAILED DESCRIPTION

[0048] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0049] In order to solve the technical problem of poor welding effect caused by the heat difference between battery cells in the welding conveying device in the prior art, the present invention provides a battery welding conveying device. The structure and working process of the battery welding conveying device of the present invention are schematically described below through three embodiments.

[0050] First embodiment

[0051] like Figure 1 to Figure 2 As shown, the battery welding conveying device provided in this embodiment at least includes a base 10, a stepping platform 20, a fixed platform 30, a connecting platform 40 and a conveyor belt (not shown).

[0052] The stepping platform 20 is movably connected to the base 10 .

[0053] The fixed platform 30 is fixedly connected to the base 10 , and a welding station is formed on the fixed platform 30 .

[0054] The docking platform 40 is configured to dock the stepping platform 10 and the fixing platform 30 .

[0055] The conveyor belt is supported on the stepping platform 20, the connecting platform 40 and the fixed platform 30. A predetermined number of battery cells are sequentially loaded onto the conveyor belt located on the stepping platform 20. The conveyor belt is configured to stepwise transport the predetermined number of battery cells to the welding station.

[0056] The predetermined number mentioned here can be the number of battery cells included in a battery string, or the number of battery cells included in multiple battery strings. For example, in some welding applications, the welding device only completes the welding of one battery string at a time, so in these application examples, the predetermined number mentioned refers to the number of battery cells required to form a battery string. In other welding applications, the welding device completes the welding of multiple battery strings in parallel each time, so in these application examples, the predetermined number mentioned refers to the number of battery cells required to form multiple battery strings.

[0057] When the predetermined number of battery cells are conveyed step by step to the welding station, the welding device at the welding station performs welding operations on the predetermined number of battery cells, thereby welding the predetermined number of battery cells into one or more battery strings.

[0058] The stepping platform 20 is configured to be able to step toward or away from the fixed platform 30. During the battery cell loading process, each time i battery cells are loaded onto the conveyor belt, the stepping platform 20 steps away from the fixed platform by a predetermined distance until all the predetermined number of battery cells are loaded onto the conveyor belt, where i is a natural number greater than 0 and less than the value corresponding to the predetermined number. The predetermined distance of each step of the stepping platform 20 mentioned here matches the length of the i battery cells loaded onto the conveyor belt in the conveying direction of the conveyor belt.

[0059] By providing a stepping platform 20 that can move stepwise toward or away from the fixed platform 30, during the battery cell loading process, each time the i battery cells of the current batch are loaded to the loading position on the conveyor belt, the stepping platform 20 steps away from the fixed platform 30 by a predetermined distance, thereby driving the conveyor belt and the i battery cells of the current batch loaded thereon to synchronously step away from the fixed platform 30 by a predetermined distance. In this way, it can be ensured that the loading position on the conveyor belt close to the loading station is always kept vacant, so that the i battery cells of the next batch can be smoothly loaded to the loading position.

[0060] Therefore, in the battery welding conveying device in this embodiment, during the loading process, the conveyor belt does not need to step toward the welding station, and a predetermined number of battery cells can be continuously and sequentially loaded to the loading position on the conveyor belt, so that the conveyor belt can synchronously step the predetermined number of battery cells loaded thereon to the welding station, ultimately ensuring the heating consistency of each battery cell and improving the welding effect.

[0061] In this embodiment, when the stepping platform 20 steps toward the fixed platform 30, the connecting platform 40 is configured to shrink toward the middle to shorten the length of the conveyor belt supporting surface of the connecting platform located between the stepping platform 20 and the fixed platform 30. When the stepping platform 20 steps away from the fixed platform 30, the connecting platform 40 is configured to expand toward both ends to extend the length of the conveyor belt supporting surface of the connecting platform 40 located between the stepping platform 20 and the fixed platform 30.

[0062] By providing a retractable connecting platform 40, during the stepping process of the stepping platform 20, a conveyor belt supporting surface connecting the stepping platform 20 and the fixed platform 30 is always maintained between the fixed platform 30 and the stepping platform 20, thereby preventing the conveyor belt supported between the fixed platform 30 and the stepping platform 20 from sinking.

[0063] Optional, such as Figures 3 to 5As shown, the connection platform 40 in this embodiment includes a slide rail 41, an articulated telescopic frame 42 and a plurality of adsorption blocks 43. The slide rail 41 is arranged on the base 10 along the conveying direction of the conveyor belt. The two ends of the articulated telescopic frame 42 are respectively hinged on the stepping platform 20 and the fixed platform 30.

[0064] Multiple adsorption blocks 43 are equidistantly arranged along the conveying direction of the conveyor belt. Each adsorption block 43 is fixed on an articulated telescopic frame 42 and slidably connected to the slide rail 41. The upper surfaces of the multiple adsorption blocks 43 constitute the conveyor belt supporting surface of the connection platform 40.

[0065] like Figure 5 As shown, optionally, the slide rails 41 are provided in two groups, and the two groups of slide rails 41 are respectively provided at the two side edges of the base 10, and the two ends of each adsorption block 43 are respectively slidably connected to one group of slide rails 41. Optionally, the two ends of each adsorption block 43 are respectively slidably connected to the slide rail 41 through a sliding connection block 431 assembled on the slide rail 41.

[0066] In order to prevent the sliding connection blocks 431 of two adjacent adsorption blocks 43 from interfering with each other, Figure 5 As shown, preferably, each set of slide rails 41 includes two slide rails arranged in parallel, and the sliding connection blocks 431 of two adjacent adsorption blocks 43 are staggeredly assembled on different slide rails.

[0067] When the stepping platform 20 steps toward the fixed platform 30, the articulated telescopic frame 42 contracts toward the middle to drive the multiple adsorption blocks 43 to move toward the middle, thereby shortening the length of the conveyor belt support surface of the connecting platform 40. When the stepping platform 20 steps away from the fixed platform 30, the articulated telescopic frame 42 expands toward both ends to drive the multiple adsorption blocks 43 to separate toward both ends, thereby extending the length of the conveyor belt support surface of the connecting platform 40.

[0068] Optionally, each adsorption block 43 is provided with an adsorption hole. By providing the adsorption holes on the adsorption blocks 43, the positioning function of the connection platform 40 can be achieved, and the connection platform 40 adsorbs the battery sheet tightly onto the conveyor belt through the adsorption holes.

[0069] During the welding process, after placing the welding tape on the conveyor belt, it is generally necessary to use an iron tool to press the welding tape onto the conveyor belt. However, during the stepping of the conveyor belt, the tool may slip and deviate from the welding tape. In order to solve this problem, grooves are optionally provided on both sides of the stepping platform and the fixed platform, and magnetic suction parts are provided in the grooves. The magnetic suction parts in the grooves can adsorb and press the tool onto the conveyor belt, thereby preventing the tool from slipping and deviating from the welding tape.

[0070] Optionally, the welding conveying device in this embodiment further includes a stepping platform driving mechanism (not shown) and a conveyor belt driving mechanism 50 .

[0071] The stepping platform driving mechanism is disposed on the base 10 , and is used to drive the stepping platform 20 to step toward or away from the fixed platform 30 .

[0072] The conveyor belt driving mechanism 50 is used to drive the conveyor belt to step and transport. Figure 1 and Figure 2 As shown, optionally, the conveyor belt driving mechanism 50 includes a main driving roller 51, a tensioning roller 52, a first guide roller 53 and a second guide roller 54. Among them: the main driving roller 51 is arranged on the end of the fixed platform 30 away from the stepping platform 20, the tensioning roller 52 is slidably connected to the bottom of the base 10 and can step toward or away from the fixed platform 30 in the conveying direction of the conveyor belt, the first guide roller 53 is installed at the bottom of the stepping platform 20 and is located above the tensioning roller 52, and the second guide roller 54 is connected to the end of the stepping platform 20.

[0073] The conveyor belt is installed on the main driving roller 51 , the first guide roller 53 and the second guide roller 54 and is tensioned by the tensioning roller 52 .

[0074] Before the battery cells are loaded, the conveyor belt can be tensioned by adjusting the position of the tensioning roller 52 to ensure that the conveyor belt is wound around the conveyor belt driving mechanism 50 in a tensioned state.

[0075] Optionally, the conveyor belt driving mechanism 50 further includes a tensioning driving mechanism for driving the tensioning roller 52 to move, and the tensioning driving mechanism is configured to drive the tensioning roller 52 to move toward or away from the fixed platform 30, thereby achieving continuous tensioning of the conveyor belt.

[0076] Second embodiment

[0077] The overall structure and working principle of the battery welding conveyor provided in this embodiment are basically the same as those of the first embodiment, so its overall structure can still be referred to. Figure 1 and Figure 2 The only difference between the battery welding conveying device in this embodiment and the battery welding conveying device in the first embodiment is that the structure of the connection platform 40 in this embodiment is different from that in the first embodiment.

[0078] For the sake of brevity, in this embodiment, we only provide a targeted description of this difference. For the rest, please directly refer to the relevant content in the first embodiment above.

[0079] In this embodiment, when the stepping platform 20 steps toward the fixed platform 30, the connecting platform 40 is configured to be hidden under the stepping platform 20 section by section to shorten the length of the conveyor belt supporting surface of the connecting platform 40. When the stepping platform 20 steps away from the fixed platform 30, the connecting platform 40 is configured to be exposed between the stepping platform 20 and the fixed platform 30 section by section to extend the length of the conveyor belt supporting surface of the connecting platform 40.

[0080] By providing a connecting platform 40 that can be hidden under the stepping platform 20 section by section or exposed between the stepping platform 20 and the fixed platform 30 section by section, during the stepping process of the stepping platform 20, a conveyor belt support surface connecting the stepping platform 20 and the fixed platform 30 is always maintained between the stepping platform 20 and the fixed platform 30, thereby preventing the conveyor belt located between the fixed platform 30 and the stepping platform 20 from sinking.

[0081] Optional, such as Figures 6 to 8 As shown, the connecting platform 40 includes two groups of guide grooves 41 connected to the stepping platform 20 along the conveying direction of the conveyor belt and a plurality of adsorption blocks 43 arranged along the conveying direction of the conveyor belt.

[0082] The two groups of guide grooves 41 respectively include a first horizontal groove section 411 at a lower first height, a second horizontal groove section 413 at a higher second height, and an inclined groove section 412 connecting the first horizontal groove section 411 and the second horizontal groove section 413. The first horizontal groove section 411 is hidden under the stepping platform 20, and the inclined groove section 412 and the second horizontal groove section 413 extend toward the fixed platform 30 and expose the stepping platform 20.

[0083] Each adsorption block 43 can be floatingly supported on the base 10 via a vertical elastic telescopic rod 45, and each adsorption block 43 is slidably connected to a group of guide grooves 41 through the mounting parts on both sides, wherein: the upper surface of each adsorption block 43 slidably connected to the second horizontal groove section 413 of the guide groove 41 constitutes the conveyor belt support surface of the connecting platform 40, and each adsorption block 43 slidably connected to the first horizontal groove section 411 of the guide groove is hidden under the stepping platform 20.

[0084] When the stepping platform 20 steps toward the fixed platform 30, the adsorption blocks 43 slidably connected to the second horizontal slot section 413 are driven by the stepping platform 20 to descend one by one along the inclined slot section 412 and finally connected to the first horizontal slot section 413, thereby shortening the length of the conveyor belt supporting surface of the connecting platform 40. In this process, the elastic telescopic rod 45 is shortened under the pressure of the adsorption block 43, and the adsorption block 43 floats downward.

[0085] When the stepping platform 20 steps away from the fixed platform 30, the adsorption blocks 43 slidably connected to the first horizontal slot section 413 are driven by the stepping platform 20 to rise one by one along the inclined slot section 412 and connect to the second horizontal slot section 413, thereby extending the length of the conveyor belt supporting surface of the connecting platform 40. In this process, the elastic telescopic rod 45 is extended under the pulling of the adsorption block 43, and the adsorption block 43 floats upward.

[0086] Optionally, the mounting portion includes a vertical connecting rod 42 connected to the adsorption block 43 and a roller 44 disposed at the lower end of the connecting rod 42 , and the roller 44 is assembled in the guide groove 43 .

[0087] The present invention further provides a battery welding conveying method, which can be implemented by any battery welding conveying device in the above embodiments of the present invention, and comprises the following steps:

[0088] Load i battery cells onto the conveyor belt on the stepping platform 20 , where i is a natural number greater than 0.

[0089] The stepping platform 20 is controlled to step a predetermined distance away from the fixed platform 30. In this process, the connecting platform 40 is pulled by the stepping platform 20 to expand toward both ends or exposed between the stepping platform 20 and the fixed platform 30 in sections to extend the length of the conveyor belt supporting surface of the connecting platform 40.

[0090] When the number of cells on the conveyor belt on the stepping platform 20 reaches a predetermined number, the stepping platform 20 is controlled to step toward the fixed platform 30 until it reaches a position close to the fixed platform. During this process, the connecting platform 40 is pushed by the stepping platform 20 to shrink toward the middle or hide under the stepping platform 20 section by section, so as to shorten the length of the conveyor belt support surface of the connecting platform 40.

[0091] The conveyor belt is controlled to convey a predetermined number of battery cells to the welding station to carry out subsequent welding operations.

[0092] The position close to the fixed platform mentioned here is a predetermined position close to the fixed platform 30, which can also be understood as the initial position or reset position of the stepping platform 20. The stepping platform 20 is in this position before the battery cells are loaded and when the conveyor belt is stepping and conveying the loaded battery cells to the welding station.

[0093] It can be seen that the present invention also provides a battery welding conveying method. During the loading process, the conveyor belt does not need to step toward the welding station. A predetermined number of battery cells can be continuously and sequentially loaded to the loading position on the conveyor belt, so that the conveyor belt can synchronously step the predetermined number of battery cells loaded thereon to the welding station, ultimately ensuring the heating consistency of each battery cell and improving the welding effect.

[0094] In some embodiments, the welding device only completes the welding of one battery string at a time. In this case, only one laying line is arranged on the conveyor belt on the stepping platform, and the battery cells are sequentially loaded and laid on a laying line on the conveyor belt on the stepping platform. In these embodiments, i can be set to 1, that is, the stepping platform 20 moves once for each battery cell loaded. Of course, i can also be set to be greater than 1. When i battery cells are laid on the laying line on the conveyor belt simultaneously or sequentially, the stepping platform 20 steps once.

[0095] It should be noted that in these embodiments, the battery cells can be placed at intervals or the front and rear edges of the battery cells can be overlapped.

[0096] In some other embodiments, the welding device can complete the welding of at least two battery strings in parallel each time. Correspondingly, at least two laying lines are arranged on the conveyor belt, and the value of i is set to be equal to the number of laying lines or to be an integer multiple of the number of laying lines. In these embodiments, when i battery cells are laid simultaneously or sequentially on at least two laying lines on the conveyor belt, the stepping platform 20 steps once.

[0097] It should be noted that in these embodiments, during the process of loading i battery cells, the battery cells can be placed side by side at the same time or side by side in sequence, and within each laying line, the battery cells can be placed at intervals or overlapped front to back.

[0098] The present invention also provides a battery welding device, which includes a welding conveying device, a battery cell feeding device, a welding strip feeding device and a welding device, wherein:

[0099] The cell feeding device feeds the cell to the welding conveyor device, and the solder strip feeding device feeds the solder strip to the welding conveyor device. The cell feeding device and the solder strip feeding device feed the soldering conveyor device in sequence, so that the cell and the solder strip on the welding conveyor device are stacked;

[0100] The welding conveying device conveys the stacked battery cells and welding strips to the welding station. The welding conveying device adopts the battery welding conveying device provided by any of the above embodiments of the present invention;

[0101] The welding device welds the battery cells and welding ribbons at the welding station to form a battery string.

[0102] Through the cooperation of the welding conveying device, the battery cell feeding device, the soldering strip feeding device and the welding device, the battery welding equipment of the present invention can realize automatic feeding of battery cells and soldering strips and automatic welding of battery cells.

[0103] In addition, by optimizing the setting of the welding conveyor device, during the loading process, the conveyor belt does not need to step toward the welding station, and a predetermined number of battery cells can be continuously and sequentially loaded onto the conveyor belt, so that the welding conveyor device can synchronously step the battery cells loaded thereon to the welding station, ultimately ensuring the heating consistency of each battery cell and improving the welding effect.

[0104] The present invention has been described in sufficient detail with certain particularity. It should be understood by those skilled in the art that the description in the embodiments is merely exemplary, and all changes made without departing from the true spirit and scope of the present invention should fall within the scope of protection of the present invention. The scope of protection claimed by the present invention is defined by the claims, rather than by the above description in the embodiments.

Claims

1. A battery welding conveying device, characterized in that: The battery welding conveying device comprises a base, a stepping platform, a fixed platform, a connecting platform and a conveyor belt, wherein: The stepping platform is movably connected to the base; The fixed platform is fixedly connected to the base, and a welding station is formed on the fixed platform; The connection platform is configured to connect the stepping platform and the fixed platform; The conveyor belt is supported on the stepping platform, the connecting platform and the fixed platform, and a predetermined number of battery cells are sequentially loaded onto the conveyor belt located on the stepping platform, and the conveyor belt is configured to stepwise convey the predetermined number of battery cells to the welding station; The stepping platform is configured to be able to step toward or away from the fixed platform, and each time i battery cells are loaded onto the conveyor belt, the stepping platform steps away from the fixed platform by a predetermined distance until all the predetermined number of battery cells are loaded onto the conveyor belt, wherein i is a natural number greater than 0 and less than a value corresponding to the predetermined number; When the stepping platform steps toward the fixed platform, the connecting platform is configured to shrink toward the middle or hide under the stepping platform section by section to shorten the conveyor belt supporting surface of the connecting platform; when the stepping platform steps away from the fixed platform, the connecting platform is configured to expand toward both ends or be exposed between the stepping platform and the fixed platform section by section to extend the conveyor belt supporting surface of the connecting platform.

2. The battery welding conveying device according to claim 1, characterized in that: The connection platform includes: A slide rail disposed on the base along a conveying direction of the conveyor belt; An articulated telescopic frame with two ends respectively connected to the stepping platform and the fixed platform; A plurality of adsorption blocks are arranged along the conveying direction of the conveyor belt, the adsorption blocks are connected to the articulated telescopic frame and are slidably connected to the slide rail, and the upper surfaces of the plurality of adsorption blocks constitute the conveyor belt supporting surface of the connection platform; When the stepping platform steps toward the fixed platform, the articulated telescopic frame contracts toward the middle to drive the multiple adsorption blocks to move inward; when the stepping platform steps away from the fixed platform, the articulated telescopic frame expands toward both ends to drive the multiple adsorption blocks to separate toward both ends.

3. The battery welding conveying device according to claim 2, characterized in that: The slide rails are arranged in two groups, and the two groups of slide rails are respectively arranged at the two side edges of the base, and the two ends of each adsorption block are respectively slidably connected to one group of slide rails via a sliding connection block, and the adsorption block is provided with adsorption holes.

4. The battery welding conveying device according to claim 1, characterized in that: The connection platform includes: Two groups of guide grooves connected to the stepping platform along the conveying direction of the conveyor belt, the guide grooves comprising a first horizontal groove section located at a first height, a second horizontal groove section located at a second height, and an inclined groove section connecting the first horizontal groove section and the second horizontal groove section, the second height is higher than the first height, the first horizontal groove section is hidden under the stepping platform, and the inclined groove section and the second horizontal groove section extend toward the fixed platform and expose the stepping platform; A plurality of adsorption blocks are arranged along the conveying direction of the conveyor belt, the adsorption blocks are floatingly supported on the base through vertical elastic telescopic rods, and the adsorption blocks are slidably connected to a group of guide grooves through mounting parts on both sides, wherein: the upper surface of each adsorption block slidably connected to the second horizontal groove section of the guide groove constitutes the conveyor belt supporting surface of the connecting platform, and each adsorption block slidably connected to the first horizontal groove section of the guide groove is hidden under the stepping platform; When the stepping platform steps toward the fixed platform, the adsorption blocks slidably connected to the second horizontal slot section descend one by one along the inclined slot section and connect to the first horizontal slot section; When the stepping platform steps away from the fixed platform, the adsorption blocks slidably connected to the first horizontal slot section rise one by one along the inclined slot section and are connected to the second horizontal slot section.

5. The battery welding conveying device according to claim 4, characterized in that: The mounting portion includes a vertical connecting rod connected to the adsorption block and a roller arranged at the lower end of the connecting rod, and the roller is assembled in the guide groove.

6. The battery welding conveying device according to claim 1, characterized in that: The battery welding conveying device also includes a stepping platform driving mechanism for driving the stepping platform to step, the stepping platform driving mechanism is arranged on the base, and the driving end of the stepping platform driving mechanism is connected to the stepping platform.

7. The battery welding conveying device according to claim 1, characterized in that: The battery welding conveying device further includes a conveyor belt driving mechanism for driving the conveyor belt to step and convey, and the conveyor belt driving mechanism includes a main driving roller, a tensioning roller, a first guide roller and a second guide roller, wherein: The main driving roller is arranged at the end of the fixed platform away from the stepping platform, the tensioning roller is slidably connected to the bottom of the base and can move toward or away from the fixed platform in the conveying direction of the conveyor belt, the first guide roller is connected to the bottom of the stepping platform and is located above the tensioning roller, and the second guide roller is connected to the end of the stepping platform away from the fixed platform; The conveyor belt is installed on the main driving roller, the first guide roller and the second guide roller and is tensioned by the tensioning roller.

8. The battery welding conveying device according to any one of claims 1 to 7, characterized in that: Grooves are arranged on both sides of the stepping platform and the fixed platform, and magnetic suction parts are arranged in the grooves.

9. A battery welding conveying method, characterized in that: The battery welding conveying method is implemented by the battery welding conveying device according to any one of claims 1 to 8, and comprises: Load i battery cells onto the conveyor belt on the stepping platform, where i is a natural number greater than 0; Controlling the stepping platform to step a predetermined distance in a direction away from the fixed platform; When the number of battery cells on the conveyor belt on the stepping platform reaches a predetermined number, the stepping platform is controlled to step toward the fixed platform until it reaches a position close to the fixed platform; The conveyor belt is controlled to convey the predetermined number of battery cells toward the welding station.

10. A battery welding device, characterized in that: The battery welding equipment includes a welding conveying device, a battery cell feeding device, a welding strip feeding device and a welding device, wherein: The cell feeding device feeds the cell to the welding conveyor, and the solder strip feeding device feeds the solder strip to the welding conveyor. The cell feeding device and the solder strip feeding device feed the soldering conveyor in sequence, so that the cell and solder strip on the welding conveyor are stacked; The welding conveying device adopts the battery welding conveying device according to any one of claims 1 to 8, and the welding conveying device conveys the stacked battery cells and welding strips to the welding station; The welding device welds the battery cells and welding strips at the welding station to form a battery string.

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