Battery welding method and battery

Abstract

The invention discloses a battery welding method and a battery. The battery welding method comprises the steps that a welding mechanism and a deviation rectifying mechanism are moved to preset positions correspondingly; and the welding mechanism and the deviation rectifying mechanism enter a welding mode, and in the welding mode, the independent moving mode of the welding mechanism and the synchronous moving mode of the welding mechanism and the deviation rectifying mechanism are switched. After the welding mechanism and the deviation rectifying mechanism enter the welding mode, the mode that the welding mechanism can move independently or the mode that the welding mechanism and the deviation rectifying mechanism move synchronously can be formed, the two modes can be switched, and therefore the welding track can be close to the gap between the shell and the cover plate; therefore, the welding track can completely cover the gap between the shell and the cover plate, and a better welding effect and a higher welding speed can be achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and in particular to a battery welding method and a battery. Background Art

[0002] At present, the welding time between the shell and the cover plate in the battery is first calculated based on the time that the horizontal transport axis of the welding head moves a fixed distance at a fixed speed when welding each side of the battery, and then the moving speed of the axis is calculated based on the time and the moving distance of the welding head correction axis, until a linear interpolation method of almost simultaneous movement and stopping is achieved. However, this does not take into account the acceleration time and the motor response time. When the welding mechanism and the correction mechanism move at the same time, due to the reserved acceleration distance, this may cause the welding path to be a straight line, which may result in the welding trajectory being unable to completely cover the gap between the shell and the cover plate. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a battery welding method, which does not require a separate calculation of the deviation correction speed, and can also make the welding mechanism move alone, or the welding mechanism and the deviation correction mechanism move synchronously, so that the welding track can completely cover the gap between the shell and the cover plate.

[0004] The present invention further provides a battery.

[0005] The battery welding method according to the present invention comprises: moving a welding mechanism and a deviation correcting mechanism to preset positions respectively; making the welding mechanism and the deviation correcting mechanism enter a welding mode, and in the welding mode, switching between the form of the welding mechanism moving alone and the form of the welding mechanism and the deviation correcting mechanism moving synchronously.

[0006] According to the battery welding method of the present invention, after the welding mechanism and the correcting mechanism enter the welding mode, a form in which the welding mechanism can move alone, or a form in which the welding mechanism and the correcting mechanism move synchronously can be formed, and the two forms can be switched. This setting can make the welding track close to the gap between the shell and the cover plate, so that the welding track can completely cover the gap between the shell and the cover plate, thereby achieving better welding effect and faster welding speed.

[0007] In addition, the battery welding method of the above embodiment of the present invention may also have the following additional technical features: In some examples of the present invention, in the welding mode, the step of switching between the form of the welding mechanism moving alone and the form of the welding mechanism and the correcting mechanism moving synchronously includes: moving the welding mechanism alone to a first preset speed; and moving the welding mechanism that reaches the first preset speed synchronously with the correcting mechanism.

[0008] In some examples of the present invention, the step of moving the welding mechanism alone to a first preset speed includes: moving the welding mechanism to the first preset speed at a fixed acceleration within a first preset distance.

[0009] In some examples of the present invention, the step of making the welding mechanism that reaches the first preset speed move synchronously with the correcting mechanism includes: making the welding mechanism move synchronously with the correcting mechanism to obtain a welding trajectory generated according to a preset path and a second preset speed.

[0010] In some examples of the present invention, the preset path includes a second preset distance of the welding mechanism in the moving direction thereof and a third preset distance of the deviation correcting mechanism in the moving direction thereof.

[0011] In some examples of the present invention, in the process of making the welding mechanism and the correcting mechanism move synchronously to obtain a welding trajectory generated according to a preset path and a second preset speed, the welding mechanism and the correcting mechanism have different corresponding moving speeds.

[0012] In some examples of the present invention, in the welding mode, the step of switching between the form of the welding mechanism moving alone and the form of the welding mechanism and the correcting mechanism moving synchronously, further includes: after the welding mechanism reaching the first preset speed and the correcting mechanism moving synchronously are completed, the welding mechanism reaching the first preset speed moves alone until it stops.

[0013] In some examples of the present invention, the steps of moving the welding mechanism and the correcting mechanism to preset positions respectively include: moving the welding mechanism to a first preset position; obtaining a second preset position according to the correcting value of the battery; and moving the correcting mechanism to the second preset position.

[0014] In some examples of the present invention, before the step of obtaining the second preset position according to the deviation correction value of the battery, the method further includes: fixing the battery; and taking an image of the battery to obtain the deviation correction value of the battery.

[0015] The battery according to the embodiment of the present invention is manufactured by using the above-mentioned battery welding method.

[0016] Compared with the prior art, the present invention adopts a form in which the welding mechanism can move alone, or the welding mechanism and the correcting mechanism can move synchronously after entering the welding mode. The two forms can be switched. This setting can make the welding trajectory close to the gap between the shell and the cover plate, so that the welding trajectory can completely cover the gap between the shell and the cover plate, thereby achieving better welding effect and faster welding speed.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which: Figure 1 is a flow chart of a battery welding method according to one embodiment of the present invention; Figure 2 is a flow chart of a battery welding method according to another embodiment of the present invention; Figure 3 It is a schematic diagram of the partial structure of the battery.

[0019] Reference numerals: 1. Shell; 2. Cover. DETAILED DESCRIPTION

[0020] Embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Embodiments of the present invention are described in detail below.

[0021] Reference below Figure 1-Figure 3 A welding method of a battery according to an embodiment of the present invention is described, and the welding method of the battery is applied to a battery.

[0022] Figure 1 is a flow chart of a battery welding method according to an embodiment of the present invention, Figure 1 As shown, the battery welding method according to the present invention includes: moving the welding mechanism and the correcting mechanism to preset positions respectively; making the welding mechanism and the correcting mechanism enter the welding mode, and in the welding mode, switching the form of the welding mechanism moving alone and the form of the welding mechanism and the correcting mechanism moving synchronously.

[0023] Among them, Figure 3As shown, after the shell 1 and the cover plate 2 of the battery are relatively close, there is a certain gap between the shell 1 and the cover plate 2. The welding mechanism and the correcting mechanism are set at a preset position, so that the welding mechanism and the correcting mechanism can be prepared for the welding mode. When the shell 1 and the cover plate 2 are about to be welded, the welding mode is turned on. At this time, the welding mechanism can accelerate and move alone, or the welding mechanism drives the correcting mechanism to move synchronously. This setting does not need to calculate the speed of the correcting mechanism separately, thereby simplifying the welding steps, and can also make the welding trajectory completely cover the gap between the shell 1 and the cover plate 2, thereby achieving better welding effect and faster welding speed, and the shell 1 and the cover plate 2 after welding can form a solid whole, and can also ensure the sealing of the battery, thereby ensuring the performance of the battery and extending the service life of the battery.

[0024] For example, the path of the welding process in the prior art is "fold-flat-fold", while the path of the welding process in the present invention is "flat-fold-flat", which can simplify the welding steps and make the welding track completely cover the gap between the shell 1 and the cover plate 2, thereby achieving better welding effect and faster welding speed.

[0025] Therefore, after the welding mechanism and the correcting mechanism enter the welding mode, the welding mechanism can be moved alone, or the welding mechanism and the correcting mechanism can be moved synchronously. The two forms can be switched. This setting can make the welding track close to the gap between the shell 1 and the cover plate 2, so that the welding track can completely cover the gap between the shell 1 and the cover plate 2, thereby achieving better welding effect and faster welding speed.

[0026] According to a specific embodiment of the present invention, in the welding mode, the step of switching between the form of independent movement of the welding mechanism and the form of synchronous movement of the welding mechanism and the correcting mechanism includes: moving the welding mechanism alone to a first preset speed; and moving the welding mechanism that reaches the first preset speed synchronously with the correcting mechanism.

[0027] Specifically, when the shell 1 and the cover plate 2 are about to be welded, the welding mode is turned on. At this time, the welding mechanism can accelerate and move alone, or the welding mechanism drives the correcting mechanism to move synchronously. In this setting, there is no need to calculate the speed of the correcting mechanism separately. Before welding starts, the welding mechanism and the correcting mechanism are both in the initial position. After the speed of the welding mechanism reaches a certain speed, it starts to move and weld, that is, the welding mechanism reaches the first predetermined speed. At this time, the welding mechanism only moves in one direction and does not move in a direction perpendicular to this direction, so that the welding mechanism can be in an acceleration process from 0 to the first preset speed, and the welding mechanism drives the correcting mechanism to move synchronously. In this setting, the welding trajectory can be close to the gap between the shell 1 and the cover plate 2, so that the welding trajectory can completely cover the gap between the shell 1 and the cover plate 2, thereby achieving better welding effect and faster welding speed.

[0028] According to a specific embodiment of the present invention, the step of moving the welding mechanism alone to a first preset speed includes: moving the welding mechanism to the first preset speed at a fixed acceleration within a first preset distance.

[0029] Specifically, when the welding mechanism moves and the correcting mechanism stops, the welding mechanism is at a first preset distance. The first preset distance can enable the welding mechanism to accelerate sufficiently, that is, the speed of the welding mechanism gradually accelerates from 0, and the acceleration of the welding mechanism is maintained at a certain value, so that the welding mechanism can maintain uniform acceleration to the first preset speed, so that the welding mechanism can drive the correcting mechanism to move at a uniform speed, thereby ensuring that the welding trajectory completely covers the gap between the shell 1 and the cover plate 2.

[0030] According to a specific embodiment of the present invention, the step of making the welding mechanism and the correcting mechanism move synchronously at a first preset speed includes: making the welding mechanism and the correcting mechanism move synchronously to obtain a welding trajectory generated according to a preset path and a second preset speed.

[0031] Specifically, when the welding mechanism has traveled the first preset distance, the welding mechanism has a certain speed at this time, and the welding mechanism will drive the correcting mechanism to move synchronously. At this time, the welding mechanism and the correcting mechanism move at a uniform speed, that is, the welding mechanism and the correcting mechanism move synchronously at the second preset speed. This setting does not require the speed of the correcting mechanism to be calculated separately, thereby simplifying the welding steps, and can also make the welding trajectory completely cover the gap between the shell 1 and the cover plate 2, thereby achieving better welding effects and faster welding speeds. Moreover, the shell 1 and the cover plate 2 after welding can form a solid whole, and can also ensure the sealing of the battery, thereby ensuring the performance of the battery and extending the service life of the battery.

[0032] According to a specific embodiment of the present invention, the preset path includes a second preset distance of the welding mechanism in the moving direction thereof and a third preset distance of the deviation correcting mechanism in the moving direction thereof.

[0033] Specifically, the distance moved by the welding mechanism when welding the shell 1 and the cover plate 2 is the second preset distance, and the welding mechanism drives the correcting mechanism to move synchronously. At this time, the distance moved by the correcting mechanism is the third preset distance, and the second preset distance is the same as the third preset distance. The welding mechanism and the preset mechanism move at a uniform speed, and the welding mechanism and the correcting mechanism move in one direction and also move in a direction perpendicular to this direction. In this way, the moving distances of the welding mechanism and the correcting mechanism can form a linear interpolation. The linear interpolation is a process of describing the shape of the workpiece contour through a calculation process based on the input basic data, so that the welding trajectory can completely cover the gap between the shell 1 and the cover plate 2, thereby achieving a better welding effect and a faster welding speed. Moreover, the shell 1 and the cover plate 2 after welding can form a solid whole, and the sealing of the battery can be ensured, thereby ensuring the performance of the battery and extending the service life of the battery.

[0034] According to a specific embodiment of the present invention, in the process of making the welding mechanism and the correcting mechanism move synchronously to obtain a welding trajectory generated according to a preset path and a second preset speed, the corresponding moving speeds of the welding mechanism and the correcting mechanism are different.

[0035] Specifically, when the welding mechanism and the correcting mechanism move synchronously, the second preset speed of the welding mechanism and the correcting mechanism is uniform motion. When a certain deviation value appears in the gap between the shell 1 and the cover plate 2, the welding mechanism drives the correcting mechanism to move. When there is no deviation value in the gap between the shell 1 and the cover plate 2, the welding mechanism moves alone, so that the corresponding moving speeds of the welding mechanism and the correcting mechanism can be different. This setting does not need to calculate the speed of the correcting mechanism separately, thereby simplifying the welding steps, and can also make the welding trajectory completely cover the gap between the shell 1 and the cover plate 2, thereby achieving better welding effect and faster welding speed. Moreover, the shell 1 and the cover plate 2 after welding can form a solid whole, and can also ensure the sealing of the battery, thereby ensuring the performance of the battery and extending the service life of the battery.

[0036] According to a specific embodiment of the present invention, in the welding mode, the step of switching between the form of independent movement of the welding mechanism and the form of synchronous movement of the welding mechanism and the correcting mechanism also includes: after the synchronous movement of the welding mechanism and the correcting mechanism reaching a first preset speed is completed, the welding mechanism reaching the first preset speed is moved alone until it stops.

[0037] Specifically, the welding mechanism is at a first preset distance, and the first preset distance can enable the welding mechanism to sufficiently accelerate, that is, the speed of the welding mechanism gradually accelerates from 0, and the acceleration of the welding mechanism is maintained at a certain value, so that the welding mechanism can maintain uniform acceleration to the first preset speed. When there is no deviation value in the gap between the shell 1 and the cover plate 2, the welding mechanism moves alone, and the welding mechanism welds the gap between the shell 1 and the cover plate 2, so that the shell 1 and the cover plate 2 after welding can form a solid whole, and can also ensure the sealing of the battery, thereby ensuring the performance of the battery and extending the service life of the battery.

[0038] According to a specific embodiment of the present invention, the step of moving the welding mechanism and the correction mechanism to preset positions respectively includes: moving the welding mechanism to a first preset position; obtaining a second preset position according to the correction value of the battery; and moving the correction mechanism to the second preset position.

[0039] Specifically, in the first preset distance, the speed of the welding mechanism gradually accelerates from 0, and the acceleration of the welding mechanism is maintained at a certain value. When a certain deviation value appears in the gap between the shell 1 and the cover plate 2, the second preset position is set according to the correction value, and the welding mechanism drives the correction mechanism to move to the second preset position, so that the welding trajectory can completely cover the gap between the shell 1 and the cover plate 2, thereby achieving better welding effect and faster welding speed. Moreover, the shell 1 and cover plate 2 after welding can form a solid whole, and can also ensure the sealing of the battery, thereby ensuring the performance of the battery and extending the service life of the battery.

[0040] According to a specific embodiment of the present invention, before the step of obtaining the second preset position according to the deviation correction value of the battery, the method further includes: fixing the battery; and taking an image of the battery to obtain the deviation correction value of the battery.

[0041] Specifically, after the shell 1 and the cover plate 2 are close to each other, there is a certain gap between the shell 1 and the cover plate 2, and the gap is not a horizontal straight line, and there will be a certain deviation value. At this time, an image between the shell 1 and the cover plate 2 is taken, so that the correction value of the battery can be determined, and then the second preset position is set according to the correction value, so that the welding track can completely cover the gap between the shell 1 and the cover plate 2, thereby achieving a better welding effect and a faster welding speed. For example, the shell 1 is an aluminum shell, which facilitates the welding between the shell 1 and the cover plate 2.

[0042] The battery according to the embodiment of the present invention is made by the welding method of the battery of the above embodiment. After the welding mechanism and the deflection correction mechanism enter the welding mode, the welding mechanism can be moved alone, or the welding mechanism and the deflection correction mechanism can be moved synchronously. The two forms can be switched. This setting can make the welding track close to the gap between the shell 1 and the cover plate 2, so that the welding track can completely cover the gap between the shell 1 and the cover plate 2, thereby achieving a better welding effect and a faster welding speed.

[0043] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" 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 the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0044] In the description of the present invention, "first feature" and "second feature" may include one or more of the features. In the description of the present invention, "plurality" means two or more. In the description of the present invention, a first feature "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. In the description of the present invention, a first feature "above", "above" and "above" a second feature may include the first feature being directly above and obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature.

[0045] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0046] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery welding method, characterized in that: include: Move the welding mechanism and the deviation-correcting mechanism to preset positions respectively; The welding mechanism and the deflection correcting mechanism are put into a welding mode. In the welding mode, the welding mechanism is switched between a single movement mode and a synchronous movement mode of the welding mechanism and the deflection correcting mechanism.

2. The battery welding method according to claim 1, characterized in that: In the welding mode, the step of switching the form of the welding mechanism moving alone and the form of the welding mechanism and the correction mechanism moving synchronously comprises: The welding mechanism is moved individually to a first preset speed; The welding mechanism reaching the first preset speed is made to move synchronously with the deviation correcting mechanism.

3. The battery welding method according to claim 2, characterized in that: The step of moving the welding mechanism alone to a first preset speed comprises: The welding mechanism is moved to the first preset speed at a fixed acceleration within a first preset distance.

4. The battery welding method according to claim 2, characterized in that: The step of making the welding mechanism and the deviation correcting mechanism move synchronously after reaching the first preset speed comprises: The welding mechanism and the deviation correcting mechanism are moved synchronously to obtain a welding trajectory generated according to a preset path and a second preset speed.

5. The battery welding method according to claim 4, characterized in that: The preset path includes a second preset distance of the welding mechanism in the moving direction thereof and a third preset distance of the deviation correcting mechanism in the moving direction thereof.

6. The battery welding method according to claim 4, characterized in that: In the process of making the welding mechanism and the deviation correcting mechanism move synchronously to obtain a welding trajectory generated according to a preset path and a second preset speed, the welding mechanism and the deviation correcting mechanism correspond to different moving speeds.

7. The battery welding method according to claim 2, characterized in that: In the welding mode, the step of switching the form of the welding mechanism moving alone and the form of the welding mechanism and the correction mechanism moving synchronously also includes: After the welding mechanism reaching the first preset speed and the deviation correcting mechanism are synchronously moved, the welding mechanism reaching the first preset speed is moved alone until it stops.

8. The battery welding method according to claim 1, characterized in that: The steps of moving the welding mechanism and the deviation correcting mechanism to preset positions respectively include: Moving the welding mechanism to a first preset position; Obtaining a second preset position according to the correction value of the battery; The deviation correcting mechanism is moved to the second preset position.

9. The battery welding method according to claim 8, characterized in that: Before the step of obtaining the second preset position according to the deviation correction value of the battery, the method further includes: fixing the battery; An image of the battery is captured to obtain a deviation correction value of the battery.

10. A battery, characterized in that: The battery is manufactured by the welding method of any one of claims 1 to 9.

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