A dual-fiber cell polarization correction method and dual-fiber cell position correction system

Abstract

This application relates to a dual-fiber battery position correction method and system. The method includes: rotating the battery in a preset direction; recording a first detection position when a first fiber pair detects the tab of the battery; continuing to rotate the battery in the preset direction; recording a second detection position when a second fiber pair detects the tab; determining the length of the movement path from the first detection position to the second detection position; obtaining a preset path range; and correcting the battery position based on either the first probe position or the second probe position when the movement path length is greater than or equal to the lower limit of the preset path range and less than the upper limit of the preset path range. This application avoids correction errors caused by tab bending and improves the accuracy of correction.

Description

Technical Field

[0001] This application relates to the field of lithium battery testing technology, and in particular to a dual-fiber battery alignment method and a dual-fiber battery position alignment system. Background Technology

[0002] Currently, there are two methods for alignment detection of cylindrical battery tabs: single-fiber detection and dual-fiber detection. Single-fiber detection uses a single fiber pair to align the battery tabs, but this method can only detect the presence or absence of the tabs, not whether the tabs are closer to the receiving end or the transmitting end of the fiber pair. Dual-fiber detection uses two fiber pairs to align the battery tabs. Its advantage over single-fiber detection is that it can detect not only the presence or absence of the tabs, but also whether the tabs are closer to the receiving end or the transmitting end of the fiber pair.

[0003] However, regardless of whether it is a single-fiber detection method or a dual-fiber detection method, the requirements for the height and uprightness of the tabs are very high. Once the tabs are bent, it is easy to cause detection errors. Summary of the Invention

[0004] This application provides a dual-fiber battery alignment method and a dual-fiber battery position alignment system to solve the problem of electrode alignment errors caused by electrode bending. The technical solution of this application is as follows:

[0005] According to a first aspect of the embodiments of this application, a dual-fiber battery position correction method is provided. The method includes: rotating the battery in a preset direction, and recording a first detection position when a first fiber pair detects the tab of the battery; continuing to rotate the battery in the preset direction, and recording a second detection position when a second fiber pair detects the tab; determining the length of the movement path from the first detection position to the second detection position; obtaining a preset path range; and correcting the battery position based on the first probe position or the second probe position when the length of the movement path is greater than or equal to the lower limit of the preset path range and less than the upper limit of the preset path range.

[0006] Further, when the length of the moving path is greater than or equal to the lower limit of the preset path range and less than the upper limit of the preset path range, correcting the battery based on the first probe position or the second probe position includes: when the length of the moving path is greater than or equal to the lower limit of the preset path range and less than the upper limit of the preset path range, rotating the battery to a target angle with the first probe position as a reference; or, when the length of the moving path is greater than or equal to the lower limit of the preset path range and less than the upper limit of the preset path range, rotating the battery to a target angle with the second probe position as a reference.

[0007] Furthermore, the preset direction is either clockwise or counterclockwise.

[0008] Furthermore, when the first transmitting end of the first optical fiber pair and the second transmitting end of the second optical fiber pair are located on the same side, the lower limit of the preset path range is the shortest path length between the first transmitting end and the second transmitting end, and the upper limit is the path length between the first transmitting end and the second receiving end of the second optical fiber pair; or, when the first receiving end of the first optical fiber pair and the second transmitting end of the second optical fiber pair are located on the same side, the lower limit of the preset path range is the shortest path length between the first receiving end and the second transmitting end, and the upper limit is the path length between the first receiving end and the second receiving end of the second optical fiber pair.

[0009] According to a second aspect of the embodiments of this application, a dual-fiber battery position correction system is provided. The system includes: a fiber optic support; a first fiber pair, including a first transmitter and a first receiver, wherein the first transmitter is used to transmit light and the first receiver is used to receive light transmitted by the first transmitter; a second fiber pair, including a second transmitter and a second receiver, wherein the second transmitter is used to transmit light and the second receiver is used to receive light transmitted by the second transmitter; and a controller for executing the dual-fiber battery position correction method as described in any one of the embodiments of the first aspect of this application.

[0010] Furthermore, the fiber optic support includes a first cantilever, a second cantilever, and a crossbar, wherein the first cantilever is located at one end of the crossbar, and the second cantilever is located at the other end of the crossbar; the first transmitting end and the second receiving end are arranged side by side on the first cantilever, and the first receiving end and the second transmitting end are arranged side by side on the second cantilever; or, the first transmitting end and the second transmitting end are arranged side by side on the first cantilever, and the first receiving end and the second receiving end are arranged on the second cantilever.

[0011] Furthermore, the first fiber pair and / or the second fiber pair are disposed on the fiber support at a position opposite to the root of the tab.

[0012] Furthermore, the inner sidewall of the fiber optic bracket is black.

[0013] Furthermore, the roughness of the inner sidewall of the fiber optic bracket is greater than or equal to a preset roughness.

[0014] Furthermore, the first optical fiber pair is disposed at a first height position of the optical fiber bracket; the second optical fiber pair is disposed at a second height position of the optical fiber bracket.

[0015] The technical solutions provided by the embodiments of this application bring at least the following beneficial effects:

[0016] This application provides a dual-fiber battery position correction method, comprising: rotating the battery in a preset direction; recording a first detection position when a first fiber pair detects the tab of the battery; continuing to rotate the battery in the preset direction; recording a second detection position when a second fiber pair detects the tab; determining the length of the movement path from the first detection position to the second detection position; obtaining a preset path range; and correcting the battery position based on the first probe position or the second probe position when the length of the movement path is greater than or equal to the lower limit of the preset path range and less than the upper limit of the preset path range. This application embodiment avoids correction errors caused by tab bending, improving the accuracy of correction.

[0017] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application, and do not constitute an undue limitation of this application.

[0019] Figure 1 This is a flowchart illustrating a dual-fiber battery position correction method provided in an embodiment of this application.

[0020] Figure 2 This is a top view schematic diagram of a dual-fiber battery position correction system provided in an embodiment of this application;

[0021] Figure 3 This is a front view schematic diagram of a dual-fiber battery position correction system provided in an embodiment of this application.

[0022] Figure label:

[0023] 11-First transmitter 12-First receiver 21-Second transmitter

[0024] 22-Second receiver 3-Battery 4-Alt

[0025] 5-Fiber Optic Support Detailed Implementation

[0026] To enable those skilled in the art to better understand the technical solutions of this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0027] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0028] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for display, data used for analysis, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties.

[0029] Currently, there are two methods for alignment detection of cylindrical battery tabs: single-fiber detection and dual-fiber detection. Single-fiber detection uses a single fiber pair to align the battery tabs, but this method can only detect the presence or absence of the tabs, not whether the tabs are closer to the receiving end or the transmitting end of the fiber pair. Dual-fiber detection uses two fiber pairs to align the battery tabs. Its advantage over single-fiber detection is that it can detect not only the presence or absence of the tabs, but also whether the tabs are closer to the receiving end or the transmitting end of the fiber pair.

[0030] Whether using a single-fiber or dual-fiber testing method, the requirements for the height and upright position of the tabs are very high. If the tabs are bent, it can easily lead to testing errors.

[0031] Based on this, embodiments of this application provide a dual-fiber battery position correction method, such as... Figure 1 As shown, the method includes:

[0032] S101: The battery rotates in a preset direction, and when the first optical fiber detects the battery's tab, the corresponding first detection position is recorded.

[0033] like Figure 2 As shown, when battery 3 rotates one revolution in a preset direction, the tabs 4 of battery 3 will generally have four positions that block the optical fiber signal. That is, when battery 3 rotates one revolution, there will be four output signals.

[0034] In this embodiment, the battery 3 rotates in a preset direction, and when the first optical fiber detects the tab 4 of the battery 3, the corresponding first detection position is recorded.

[0035] The preset direction can be clockwise or counterclockwise. It should be noted that once the preset direction is selected as clockwise, it will remain clockwise throughout the entire dual-fiber cell position correction method. Figure 2 As shown, if the first transmitting end 11 of the first optical fiber pair and the second receiving end 22 of the second optical fiber pair are selected for marking, the preset direction is clockwise. Of course, the two positions on the left can also be used for marking; for example, the preset direction of the battery is counterclockwise.

[0036] For example, such as Figure 2 As shown, when the battery 3 rotates clockwise, and the tab 4 of the battery 3 moves to the first transmitting end 11 of the first optical fiber pair, the corresponding first detection position is recorded.

[0037] In practical applications, the angle of the incoming batteries is random. The servo motor below the battery can control the battery to rotate in a preset direction, thereby correcting the battery's deviation and adjusting the battery's tabs to be in the same position on the battery so that the next station can process the battery.

[0038] S103: The battery continues to rotate in a preset direction, and when the second optical fiber detects the tab, the corresponding second detection position is recorded;

[0039] In this embodiment of the application, the battery continues to rotate along a preset direction, and when the second optical fiber pair detects the tab, the corresponding second detection position is recorded. For example, as... Figure 2 As shown, when the tab 4 of the battery 3 moves to the receiving end 22 of the second optical fiber pair, the corresponding second detection position is recorded.

[0040] S105: Determine the length of the moving path from the first detection position to the second detection position;

[0041] S107: Obtain the preset path range;

[0042] In this embodiment of the application, the preset path range is a pre-set numerical range used to define whether the movement of the battery tab meets the correction condition. When the movement of the tab is within the preset path range, the battery can be corrected; otherwise, when the movement of the tab is not within the preset path range, the battery cannot be corrected.

[0043] Specifically, when the first transmitting end 11 of the first optical fiber pair and the second transmitting end of the second optical fiber pair are located on the same side, the lower limit of the preset path range is the shortest path length between the first transmitting end and the second transmitting end, and the upper limit is the path length between the first transmitting end and the second receiving end of the second optical fiber pair; or,

[0044] like Figure 2 As shown, when the first receiving end 12 of the first optical fiber pair and the second transmitting end 21 of the second optical fiber pair are located on the same side, the lower limit of the preset path range is the shortest path length between the first receiving end and the second transmitting end, and the upper limit is the path length between the first receiving end and the second receiving end of the second optical fiber pair.

[0045] S109: When the length of the moving path is greater than or equal to the lower limit of the preset path range and less than the upper limit of the preset path range, the battery is corrected based on the first probe position or the second probe position.

[0046] In this embodiment of the application, when the first receiving end 12 of the first optical fiber pair and the second transmitting end 21 of the second optical fiber pair are located on the same side, the lower limit of the preset path range is the shortest path length between the first receiving end and the second transmitting end 21, and the upper limit is the path length along the preset direction between the first receiving end 12 and the second receiving end 22, for example, as... Figure 2 As shown, the lower limit of the preset path range is the shortest path length from the battery tab at the first receiving end 12 to the second transmitting end 21, and the upper limit of the preset path range is the path length from the battery tab at the first receiving end 12 to the second receiving end 22 along the preset direction. When the moving path length is the shortest path length from the first receiving end 12 to the second transmitting end 21, the moving path length is equal to the lower limit of the preset path range, indicating that the moving path length is within the preset path range.

[0047] In other cases, when the moving path length is the path length from the position of the first receiving end 12 to the second receiving end 22 along the preset direction, the moving path length is equal to the upper limit of the preset path range. The actual condition for correction is that the moving path length is greater than or equal to the lower limit of the preset path range and less than the upper limit of the preset path range. Therefore, when the moving path length is equal to the upper limit of the preset path range, the correction is determined to fail, and the battery cannot be corrected.

[0048] In practical applications, such as Figure 2 As shown, the battery rotates clockwise. When the tab 4 of the battery 3 is detected at the transmitting end 11 of the first optical fiber pair, the battery 3 continues to rotate clockwise. If, during this process, the tab 4 of the battery 3 is bent, it is not detected at the receiving end 22 of the second optical fiber pair, but may be detected at the transmitting end 21 of the second optical fiber pair or the receiving end 12 of the first optical fiber pair. In this case, the correction is judged to have failed, and the battery cannot be corrected. This is to prevent the battery from being corrected based on the transmitting end 21 of the second optical fiber pair or the receiving end 12 of the first optical fiber pair, thus avoiding correction failure.

[0049] In this embodiment of the application, when the length of the moving path is greater than or equal to the lower limit of the preset path range and less than the upper limit of the preset path range, correcting the battery based on the first probe position or the second probe position may include:

[0050] When the length of the moving path is greater than or equal to the lower limit of the preset path range and less than the upper limit of the preset path range, the battery is rotated to the target angle based on the position of the first probe; or,

[0051] When the length of the moving path is greater than or equal to the lower limit of the preset path range and less than the upper limit of the preset path range, the battery is rotated to the target angle with the position of the second probe as a reference.

[0052] In this embodiment of the application, by rotating the battery to a target angle with the first probe position or the second probe position as a reference, it can be ensured that the tabs of the incoming battery are all located in the same position on the battery, thereby improving the accuracy of battery tab correction.

[0053] This application also provides a dual-fiber battery position correction system, such as... Figure 3As shown, the system includes: an optical fiber support 5; a first optical fiber pair, including a first transmitter 11 and a first receiver 12, wherein the first transmitter 11 is used to transmit light and the first receiver 12 is used to receive the light transmitted by the first transmitter; a second optical fiber pair, including a second transmitter 21 and a second receiver 22, wherein the second transmitter 21 is used to transmit light and the second receiver 22 is used to receive the light transmitted by the second transmitter; and a controller for executing the dual-fiber battery position correction method as described in any one of the embodiments of this application.

[0054] In some embodiments, such as Figure 3 As shown, the fiber optic support 5 includes a first cantilever, a second cantilever, and a crossbar. The first cantilever is located at one end of the crossbar, and the second cantilever is located at the other end of the crossbar. The first transmitting end 11 and the second receiving end 22 are arranged side by side on the first cantilever, and the first receiving end 12 and the second transmitting end 21 are arranged side by side on the second cantilever.

[0055] In practical applications, by placing the first transmitter 11 and the second transmitter 12 on opposite sides, interference between the two transmitters can be avoided.

[0056] In other embodiments, the fiber optic support includes a first cantilever, a second cantilever, and a crossbar. The first cantilever is located at one end of the crossbar, and the second cantilever is located at the other end of the crossbar. The first transmitter and the second transmitter are arranged side by side on the first cantilever, and the first receiver and the second receiver are arranged on the second cantilever.

[0057] In this embodiment, the incoming battery 3 is located between the first cantilever and the second cantilever, so that the battery 3 can be corrected by optical fiber transmitter and optical fiber receiver provided on the first cantilever and the second cantilever.

[0058] In this embodiment of the application, the first fiber pair and / or the second fiber pair are disposed on the fiber support at a position opposite to the root of the tab.

[0059] In practical applications, by placing the first fiber pair and / or the second fiber pair closer to the root of the tab, bent tabs can be detected more effectively, thereby improving the accuracy of correction and better compatibility with batteries of different tab heights. This avoids the need for re-adjustment every time the model is changed, thus reducing wasted time.

[0060] In this embodiment of the application, the positions of the first transmitting end and the first receiving end of the first optical fiber pair on the optical fiber support can be set to be adjustable, and the positions of the second transmitting end and the second receiving end of the second optical fiber pair can also be set to be adjustable.

[0061] In this embodiment, the inner sidewall of the fiber optic bracket is black.

[0062] In practical applications, the white brackets in existing technologies are prone to reflection, and the reflected light may be falsely sensed, causing detection errors. However, in this embodiment, by changing the fiber optic bracket to black, especially as... Figure 3 The diagram shows areas A and B facing each other.

[0063] Of course, you can also paint all the inner sidewalls of the fiber optic bracket black, making the entire bracket black.

[0064] In this embodiment of the application, the roughness of the inner sidewall of the optical fiber support is greater than or equal to a preset roughness.

[0065] In practical applications, by making the inner sidewalls of the light support rough, excess light can be further absorbed, thereby improving the accuracy of detection and correction.

[0066] In this embodiment of the application, the first optical fiber pair is disposed at a first height position of the optical fiber bracket, and the second optical fiber pair is disposed at a second height position of the optical fiber bracket.

[0067] In practical applications, by setting the first fiber pair and the second fiber pair at different heights on the fiber optic bracket, the two fiber pairs can be staggered by a certain distance in the vertical direction to prevent mutual interference between the two fiber pairs and further improve the accuracy of detection and correction.

[0068] The specific working method of the dual-fiber battery position correction system for implementing the dual-fiber battery position correction method in the embodiments of this application has been described in detail in the above embodiments of the dual-fiber battery position correction method, and will not be elaborated here.

[0069] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.

[0070] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A dual fiber cell position correction method, characterized by, The method comprises: The battery rotates in a preset direction, and a first detection position corresponding to when a first optical fiber pair detects a tab of the battery is recorded; The battery continues to rotate in the preset direction, and a second detection position corresponding to when a second optical fiber pair detects the tab is recorded; A movement path length of the first detection position to the second detection position is determined; The first optical fiber pair comprises a first transmitting end and a first receiving end, and the second optical fiber pair comprises a second transmitting end and a second receiving end; A preset path range is obtained, when the first transmitting end of the first optical fiber pair and the second transmitting end of the second optical fiber pair are located on the same side, a lower limit of the preset path range is a shortest path length between the first transmitting end and the second transmitting end, and an upper limit is a path length between the first transmitting end and the second receiving end of the second optical fiber pair along the preset direction; or, When the first receiving end of the first optical fiber pair and the second transmitting end of the second optical fiber pair are located on the same side, a lower limit of the preset path range is a shortest path length between the first receiving end and the second transmitting end, and an upper limit is a path length between the first receiving end and the second receiving end of the second optical fiber pair along the preset direction; When the movement path length is greater than or equal to the lower limit of the preset path range and less than the upper limit of the preset path range, the battery is corrected based on the first probe position or the second probe position.

2. The dual-fiber cell position deviation correction method of claim 1, wherein, The correction of the battery based on the first probe position or the second probe position when the movement path length is greater than or equal to the lower limit of the preset path range and less than the upper limit of the preset path range comprises: When the movement path length is greater than or equal to the lower limit of the preset path range and less than the upper limit of the preset path range, the battery is rotated to a target angle based on the first probe position; or, When the movement path length is greater than or equal to the lower limit of the preset path range and less than the upper limit of the preset path range, the battery is rotated to a target angle based on the second probe position.

3. The dual-fiber cell position deviation correction method of claim 1, wherein, The preset direction is a clockwise direction or a counterclockwise direction.

4. A dual fiber battery position correction system, comprising: The system comprises: An optical fiber support; A first optical fiber pair comprising a first transmitting end and a first receiving end, the first transmitting end being used for transmitting light, and the first receiving end being used for receiving light transmitted by the first transmitting end; A second optical fiber pair comprising a second transmitting end and a second receiving end, the second transmitting end being used for transmitting light, and the second receiving end being used for receiving light transmitted by the second transmitting end; A controller used for executing the double optical fiber battery position correction method according to any one of claims 1 to 3.

5. The dual-fiber cell position correction system of claim 4, wherein, The optical fiber support comprises a first cantilever, a second cantilever, and a crossbar, the first cantilever being located at one end of the crossbar, and the second cantilever being located at the other end of the crossbar; The first transmitting end and the second receiving end are arranged side by side on the first cantilever, and the first receiving end and the second transmitting end are arranged side by side on the second cantilever; or, The first transmitting end and the second transmitting end are arranged side by side on the first cantilever, and the first receiving end and the second receiving end are arranged on the second cantilever.

6. The dual-fiber cell position correction system of claim 4, wherein, The first optical fiber pair and / or the second optical fiber pair are arranged on the optical fiber support at a position opposite to the root of the tab.

7. The dual-fiber cell position correction system of claim 4, wherein, The inner side wall of the optical fiber support is black.

8. The dual-fiber cell position correction system of claim 4, wherein, The roughness of the inner side wall of the optical fiber support is greater than or equal to a preset roughness.

9. The dual-fiber cell position correction system of claim 4, wherein, The first optical fiber pair is arranged at a first height position of the optical fiber support. The second optical fiber pair is arranged at a second height position of the optical fiber support.

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