Battery repair welding method and system

Abstract

The present application relates to a battery repair welding method and system, which includes: determining the filling solder for the hole to be repaired according to the size of the hole to be repaired on the battery, fixing the filling solder into the hole to be repaired, and matching the filling solder with the hole to be repaired; welding the filling solder to the hole to be repaired. After selecting the filling solder of the corresponding size through the hole to be repaired, it is first fixed in the hole to be repaired, so that the hole to be repaired can be sealed before subsequent welding and the filling solder will not fall off from the hole to be repaired. Furthermore, during the transfer process before welding, the possibility of foreign matter such as dust particles in the environment entering the interior of the battery cell through the hole to be repaired is greatly reduced, and the possibility of welding slag falling into the interior of the battery cell during the subsequent welding of the filling solder and the hole to be repaired is also significantly reduced. Ultimately, the overall quality of the battery cell during the processing and production process is effectively improved.

Description

Technical Field

[0001] The present application relates to the field of secondary battery production, and in particular to a battery repair welding method and system. Background Art

[0002] In the battery field, the application of wire filler repair welding is mainly after the peripheral welding of the top cover is completed. Due to some equipment or environmental reasons, holes appear in the battery after the peripheral welding, which is the so-called poor welding.

[0003] For these defective products, the relevant technology often uses the method of wire filling and welding to repair them. However, this welding method uses the same welding wire to perform multiple welding repairs for different hole sizes. The welding slag generated during the repair process can easily fall through the holes into the battery cell, thereby affecting the quality of the battery cell. Summary of the Invention

[0004] The embodiments of the present application provide a battery repair welding method and system to solve the problem in the related art that when performing wire repair welding on holes on a battery, welding slag is easily caused to fall into the interior of the battery due to mismatch of the welding wire and thus affect the battery quality.

[0005] In the first aspect, a battery repair welding method is provided, which adopts the following technical solution:

[0006] Determine the filling solder for the hole to be repaired according to the size of the hole to be repaired on the battery, and fix the filling solder into the hole to be repaired, so that the filling solder matches the hole to be repaired;

[0007] The filler solder is soldered to the battery.

[0008] In some embodiments, the method of selecting a filling solder of a corresponding size according to the hole to be repaired, fixing the filling solder into the hole to be repaired, and sealing the hole to be repaired by the filling solder includes:

[0009] Processing the holes to be repaired into target standard holes according to the maximum straight-line distance of the holes to be repaired on the battery surface;

[0010] According to the target standard hole, a corresponding filling solder is selected and at least a portion of the filling solder is fixedly installed in the target standard hole.

[0011] In some embodiments, processing the hole to be repaired into a target standard hole according to the maximum straight-line distance of the hole to be repaired on the battery surface includes:

[0012] Determine a preset length interval corresponding to the maximum straight-line distance of the hole to be repaired;

[0013] Determining a target standard hole for the hole to be repaired by using a preset length interval corresponding to the maximum straight-line distance of the hole to be repaired by welding;

[0014] The hole to be repaired is processed into the target standard hole.

[0015] In some embodiments, the preset length interval includes a first length interval, a second length interval, and a third length interval, the first length interval is 0.01 mm-0.5 mm, the second length interval is 0.5 mm-1 mm, and the third length interval is 1 mm-1.5 mm.

[0016] In some embodiments, the standard hole is one of a circle, an ellipse, a racetrack, and a polygon.

[0017] In some embodiments, the filling solder and the hole to be repaired are fixedly mounted by interference fit.

[0018] In some embodiments, the filling solder is entirely located in the hole to be repaired and flush with the battery surface, or the filling solder is partially installed in the hole to be repaired and partially located outside the battery surface.

[0019] In a second aspect, a battery repair welding system is provided.

[0020] A battery repair welding system, comprising:

[0021] A measuring device for measuring the size of holes to be repaired on the surface of the battery;

[0022] A filling device, used for fixing the filling solder into the hole to be repaired;

[0023] A welding device is used to weld the filler solder to the battery.

[0024] In some embodiments, it further includes:

[0025] The cutting device is used to process the hole to be repaired into a target standard hole according to the maximum straight-line distance of the hole to be repaired on the battery surface.

[0026] The beneficial effects of the technical solution provided by this application include:

[0027] The present application provides a battery repair welding method. After selecting a filler solder of a corresponding size from a hole to be repaired, the filler solder is first fixed in the hole to be repaired. This ensures that the hole to be repaired is sealed before subsequent welding and the filler solder does not fall out of the hole to be repaired. Furthermore, during the transfer process before welding, the possibility of foreign matter such as dust particles in the environment entering the battery cell through the hole to be repaired is greatly reduced. In addition, during the subsequent welding of the filler solder and the hole to be repaired, the possibility of welding slag falling into the battery cell is also significantly reduced. Ultimately, the overall quality of the battery cell during the processing and production process is effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0029] Figure 1 A schematic diagram of the overall process provided for the embodiment of this application;

[0030] Figure 2 A schematic diagram of the process of step S100 provided in an embodiment of the present application;

[0031] Figure 3 A flowchart of step S110 provided in an embodiment of the present application. DETAILED DESCRIPTION

[0032] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0033] The application of filler wire repair welding in the battery field is mainly after the peripheral welding of the top cover is completed, due to some equipment reasons or environmental reasons, holes appear in the battery after the peripheral welding, which is the so-called poor welding. For these defective products, the related art often uses filler wire repair welding to repair them, but this welding method uses the same welding wire for multiple welding repairs for different hole sizes. The welding slag generated during the repair process can easily fall through the holes into the battery cell, thereby affecting the quality of the battery cell. In order to solve the above technical problems, the embodiments of the present application provide a battery repair welding method and system, which can solve the problem in the related art that when performing filler wire repair welding on holes on the battery, due to the mismatch of the welding wire, welding slag can easily fall into the battery cell and affect the battery quality.

[0034] The present invention provides a battery repair welding method and system. The inventive concept is that after selecting a filler solder of a corresponding size from a hole to be repaired, the filler solder is first fixed in the hole to be repaired. This ensures that the hole to be repaired can be sealed before subsequent welding and the filler solder does not fall out of the hole to be repaired. Furthermore, during the transfer process before welding, the possibility of foreign matter such as dust particles in the environment entering the battery cell through the hole to be repaired is greatly reduced. In addition, during the subsequent welding of the filler solder and the hole to be repaired, the possibility of welding slag falling into the battery cell is also significantly reduced. Ultimately, the overall quality of the battery cell during the processing and production process is effectively improved.

[0035] The battery repair welding method provided in the embodiment of the present application can be executed by the battery repair welding system provided in the embodiment of the present application.

[0036] In one possible implementation, refer to Figure 1 , an embodiment of the present application provides a battery repair welding method, which includes:

[0037] S100, determining a filling solder for the hole to be repaired according to the size of the hole to be repaired on the battery, and fixing the filling solder into the hole to be repaired, so that the filling solder matches the hole to be repaired;

[0038] S200: welding the filling solder to the hole to be repaired.

[0039] After the perimeter welding of the battery top cover, holes may appear in the battery top cover due to equipment or environmental reasons. The size of the holes is also relatively random. In the embodiment of the present application, by determining the size of the hole to be repaired on the battery, a filler solder suitable for the size of the hole to be repaired is selected to avoid the filler solder being too large or too small, resulting in waste of filler solder or poor welding between the filler solder and the hole to be repaired. The filler solder and the hole to be repaired can be matched in size and shape, or the size error between the filler solder and the hole to be repaired is within a preset range.

[0040] For example, if the hole to be repaired is a 1mm circular hole, the filling solder can be in the shape of a sphere or a round pancake with a diameter of 1mm. For another example, if the hole to be repaired is a square with a side length of 1mm, the filling solder can also be in the shape of a cube with a side length of 1mm, or a rectangular parallelepiped with a bottom surface that is a square with a side length of 1mm. In other possible embodiments, other solutions can also be adopted. The embodiments of this application are only examples and are not limited to this.

[0041] After determining the filling solder for the hole to be repaired, the filling solder is fixedly installed in the hole to be repaired, so that the filling solder is now fixed in the hole to be repaired. The embodiment of the present application does not limit the specific embodiment of the method of fixing the filling solder to the hole to be repaired. In one possible embodiment, the filling solder can be fixedly installed in the hole to be repaired manually, or the filling solder can be fixedly installed in the hole to be repaired by a filling device. After the filling solder is fixedly installed in the hole to be repaired, the filling solder and the hole to be repaired are welded. The embodiment of the present application does not specifically limit the welding method of the filling solder and the hole to be repaired. In one possible embodiment, the filling solder and the hole to be repaired can be welded by laser welding, which not only has a high welding efficiency but also a good welding effect. The embodiment of the present application only takes this as an example and is not limited to this.

[0042] In some possible implementations, between fixing the filling solder to the hole to be repaired and welding the filling solder to the hole to be repaired, that is, between step S100 and step S200, the following further steps may be included:

[0043] Perform pre-welding treatment on the battery;

[0044] Among them, in some possible embodiments, the pre-welding treatment of the battery includes transferring the battery to the welding point, while in other embodiments it may also include other adaptive operations to ensure smooth welding of the battery. The embodiments of this application only take such embodiments as examples and are not limited to this.

[0045] With this arrangement, after selecting the corresponding size of filler solder from the hole to be repaired, it is first fixed in the hole to ensure that the filler solder does not fall out of the hole to be repaired, and the hole to be repaired is sealed to a certain extent by the filler solder before subsequent welding. Furthermore, during the pre-treatment of the battery before welding, such as battery transfer, the possibility of foreign matter such as particles in the environment entering the battery cell through the hole to be repaired can be effectively reduced.

[0046] At the same time, in the subsequent process of welding and filling the solder and the holes to be repaired, that is, in step S200, the possibility of welding slag falling into the battery cell is significantly reduced.

[0047] Ultimately, the overall quality of the battery cell during the production process is effectively improved. It should be noted that when the filler solder is fixedly installed in the hole to be repaired, there should be a significant connection and fixing effect between the two to prevent it from naturally falling off from the hole to be repaired.

[0048] In different embodiments, the filling solder installed in the hole to be repaired can seal the hole to be repaired in a sealed manner, or there is a certain gap between the filling solder and the hole to be repaired.

[0049] Reference Figure 2 Optionally, step S100, determining a filler solder for the hole to be repaired according to a size of the hole to be repaired on the battery, and fixing the filler solder into the hole to be repaired, includes:

[0050] S110, processing the hole to be repaired into a target standard hole according to the maximum straight-line distance of the hole to be repaired on the battery surface;

[0051] S120 , selecting a target filling solder corresponding to the target standard hole, and fixing at least a portion of the target filling solder into the target standard hole.

[0052] Since the shapes of different holes to be repaired may vary, in order to facilitate the fixing and installation of the filler solder into the holes to be repaired, the holes to be repaired are processed into standard holes with a more uniform shape, and the size of the standard holes processed can be determined based on the maximum linear distance of the holes to be repaired. In different embodiments, holes to be repaired with different maximum linear distances can correspond to standard holes of different sizes, or multiple holes to be repaired with different maximum linear distances can correspond to standard holes of the same size.

[0053] The embodiment of the present application does not limit the number and standards of standard holes, and can be set according to actual needs. In the embodiment of the present application, the standard holes corresponding to the holes to be repaired are expressed as the target standard holes of the holes to be repaired. According to the maximum straight-line distance of the holes to be repaired on the battery surface, the target standard holes of the holes to be repaired are determined, and the holes to be repaired are processed into the target standard holes. In one possible embodiment, the standard holes can be a shape that is easy to process or relatively close to the holes to be repaired, such as a circle. The embodiment of the present application is not limited to this. For example, it can also be other shapes, such as an ellipse, a rectangle, a runway shape, etc.

[0054] With this arrangement, by processing the hole to be repaired into a target standard hole, when selecting the filling solder according to the target standard hole, the shape and size requirements of the filling solder can be further standardized, which is easy to produce and match, and then the filling solder can be quickly installed into the target standard hole, that is, the fixed installation in the hole to be repaired and the sealing of the hole to be repaired are completed.

[0055] In one possible implementation, refer to Figure 3 Step S110: processing the hole to be repaired into a target standard hole according to the maximum straight-line distance of the hole to be repaired on the battery surface, including:

[0056] S111, determining a preset length interval corresponding to the maximum straight-line distance of the hole to be repaired;

[0057] S112, determining a target standard hole for the hole to be repaired by welding using a preset length interval corresponding to the maximum straight-line distance of the hole to be repaired by welding;

[0058] S113, processing the hole to be repaired into the target standard hole.

[0059] Among them, there are multiple preset length intervals, and different preset length intervals are different interval ranges of the maximum straight-line distance of the holes to be repaired by welding, so that holes to be repaired by welding of different sizes correspond to preset length intervals, and correspond to the target standard holes through the preset length intervals, and are subsequently processed and formed.

[0060] With this arrangement, by processing the holes to be repaired of different sizes within the same length range into target standard holes of the same size, the number of specifications of filling solder can be effectively reduced, and thus a limited number of filling solder specifications can be used for holes to be repaired of a larger size range, simplifying operating conditions and reducing material and processing costs.

[0061] Furthermore, the preset length interval includes a first length interval, a second length interval and a third length interval, the first length interval is 0.01mm-0.5mm, the second length interval is 0.5mm-1mm, and the third length interval is 1mm-1.5mm.

[0062] The target standard hole diameter corresponding to the first length interval is 0.5 mm, the target standard hole diameter corresponding to the second length interval is 1 mm, and the target standard hole diameter corresponding to the third length interval is 1.5 mm.

[0063] Furthermore, the standard hole is one of a circle, an ellipse, a racetrack, and a polygon. In this embodiment, the target standard hole is preferably a circle, which further improves the convenience of installing and plugging the target standard hole with the filling solder, and is also more convenient and simple in subsequent welding operations.

[0064] In other possible implementations, the holes to be repaired are processed into target standard holes based on the maximum straight-line distance of the holes to be repaired on the battery surface. The target standard holes to be repaired can also be determined by simultaneously considering the maximum straight-line distance of the holes to be repaired on the battery surface and the shape of the holes to be repaired. The embodiment of the present application is illustrated by taking the preset length interval in the above embodiment as an example.

[0065] For example, if the maximum linear distance between the hole to be repaired and the battery surface is a circle with a diameter of 1.3 mm, the target standard hole can be a circle with a diameter of 1.5 mm. If the maximum linear distance between the hole to be repaired and the battery surface is a rectangle with a diameter of 1.3 mm, the target standard hole can be a rectangle with a length of 1.5 mm. This embodiment of the present application is merely an example and is not limited to this. In some preferred embodiments, the filler solder and the hole to be repaired are fixedly mounted by an interference fit.

[0066] This arrangement allows the filling solder to be quickly connected and fixed to the hole to be repaired, completing the sealing of the hole to be repaired by the filling solder, effectively reducing the equipment cost when installing the filling solder into the hole to be repaired.

[0067] In addition, in other embodiments, the filling solder may also be fixedly installed in the hole to be repaired by various other means, including but not limited to adhesively fixing the filling solder to the hole to be repaired, clamping fixing, etc.

[0068] Due to the interference fit between the filler solder and the hole to be repaired, in order to avoid significant deformation of the battery surface caused by the filler solder squeezing against the battery surface, which could affect battery quality, in a preferred embodiment, the filler solder is a metal material or other alloy material with a hardness no greater than that of the battery surface material, such as aluminum, tin, or aluminum alloy.

[0069] In this embodiment, the filling solder is interference-fitted into the target standard hole processed from the hole to be repaired. Since the target standard hole is more regular, the plug-in installation operation of the filling solder can be faster and more efficient.

[0070] Furthermore, in step S100, the filling solder for the hole to be repaired is determined according to the size of the hole to be repaired on the battery. When the filling solder is fixedly installed in the hole to be repaired, the filling solder is entirely in the hole to be repaired and flush with the battery surface, or the filling solder is partially installed in the hole to be repaired and partially outside the battery surface.

[0071] In some embodiments, the filler solder is entirely within the hole to be repaired and flush with the battery surface. This arrangement ensures that the battery surface is flat once the filler solder is subsequently welded to the hole to be repaired, eliminating the need for further polishing and optimization of the filler solder. This effectively reduces the need for flattening the solder material that extends beyond the hole to be repaired, as in related art, and simplifies the manufacturing process.

[0072] In other embodiments, the filling solder is partially installed in the hole to be repaired and partially located outside the battery surface.

[0073] The portion of the filling solder outside the battery surface may, in some embodiments, extend in a direction perpendicular to the battery surface, thereby facilitating vertical cutting of the portion of the filling solder after the filling solder is welded and fixed to the hole to be repaired.

[0074] Furthermore, in some embodiments, the cross-sectional area of ​​the portion of filler solder located outside the battery surface can be larger than the opening of the hole to be repaired, so that this portion of filler solder and the portion of filler solder located inside the hole to be repaired form a T-shaped structure, and this portion of filler solder abuts the battery surface outside the hole to be repaired. This facilitates installation of the filler solder into the hole to be repaired. Inserting the filler solder until it abuts the battery surface completes installation to a fixed depth within the hole to be repaired, making the insertion depth of the filler solder more accurate and uniform during installation.

[0075] The present application also provides a battery repair welding system. In one possible implementation, the present application provides a battery repair welding system, which includes:

[0076] A measuring device for measuring the size of holes to be repaired on the surface of the battery;

[0077] A filling device, used for fixing the filling solder into the hole to be repaired;

[0078] A welding device is used to weld the filler solder to the battery.

[0079] In various embodiments, the measuring device can utilize a CCD or vision system to automatically detect the hole to be repaired to obtain the size information of the hole to be repaired. Manual measurement or other methods can also be used to measure the hole to be repaired. In some embodiments, the welding device automatically presses the filler solder into the hole to be repaired, thereby securing the filler solder in the hole to be repaired in an interference fit manner to complete the sealing.

[0080] Furthermore, the provided battery repair welding system also includes:

[0081] The cutting device is used to process the hole to be repaired into a target standard hole according to the maximum straight-line distance of the hole to be repaired on the battery surface.

[0082] Specifically, in this embodiment, after detecting the size of the hole to be repaired, the measuring device will classify it based on the maximum straight-line distance data in the hole size information to obtain the preset length interval corresponding to the maximum straight-line distance of the hole to be repaired, and further obtain the corresponding target standard hole based on the corresponding preset length interval. The cutting device then further cuts the battery surface based on the hole to be repaired based on the target standard hole obtained by the measuring device and the size information data of the hole to be repaired, ultimately obtaining the target standard hole, so that the filling solder can be smoothly pressed into the target standard hole through the filling device in the subsequent steps.

[0083] In the description of this application, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0084] It should be noted that, in this application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0085] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. A battery repair welding method, characterized in that: It includes: Determine the filling solder for the hole to be repaired according to the size of the hole to be repaired on the battery, and fix the filling solder into the hole to be repaired, so that the filling solder matches the hole to be repaired; The method of determining the filling solder for the hole to be repaired according to the size of the hole to be repaired on the battery, and fixing the filling solder into the hole to be repaired, comprises: Processing the holes to be repaired into target standard holes according to the maximum straight-line distance of the holes to be repaired on the battery surface; Selecting a corresponding filling solder according to a target standard hole and fixing at least a portion of the filling solder into the target standard hole; Welding the filling solder to the hole to be repaired; The filling solder is a metal material or alloy material whose hardness is not greater than that of the battery surface material, and the filling solder is fixedly installed with the hole to be repaired by interference fit.

2. The battery repair welding method according to claim 1, characterized in that: The method of processing the hole to be repaired into a target standard hole according to the maximum straight-line distance of the hole to be repaired on the battery surface includes: Determine a preset length interval corresponding to the maximum straight-line distance of the hole to be repaired; Determining a target standard hole for the hole to be repaired by using a preset length interval corresponding to the maximum straight-line distance of the hole to be repaired by welding; The hole to be repaired is processed into the target standard hole.

3. The battery repair welding method according to claim 2, characterized in that: The preset length interval includes a first length interval, a second length interval and a third length interval, the first length interval is 0.01mm-0.5mm, the second length interval is 0.5mm-1mm, and the third length interval is 1mm-1.5mm.

4. The battery repair welding method according to any one of claims 1 to 3, characterized in that: The standard hole is one of a circle, an ellipse, a racetrack and a polygon.

5. The battery repair welding method according to claim 1, characterized in that: The filling solder is entirely located in the hole to be repaired and flush with the battery surface, or the filling solder is partially installed in the hole to be repaired and partially located outside the battery surface.

6. A battery repair welding system, the battery repair welding system being used to implement the steps of the battery repair welding method according to any one of claims 1 to 5, characterized in that: It includes: A measuring device for measuring the size of holes to be repaired on the surface of the battery; A filling device, used for fixing the filling solder into the hole to be repaired; A welding device is used to weld the filler solder to the battery.

7. The battery repair welding system according to claim 6, characterized in that: It also includes: The cutting device is used to process the hole to be repaired into a target standard hole according to the maximum straight-line distance of the hole to be repaired on the surface of the battery.

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