Battery module, conducting strip and method for replacing battery cell in battery module
By introducing a conductive sheet structure of the battery cell bracket and bendable pins into the battery module, the problem of disassembly and assembly in case of battery cell failure is solved, the maintenance and reuse of the battery module is realized, and the maintenance and reuse of the battery module is improved.
Patent Information
- Application Number
- CN202311850309.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-29
- Publication Date
- 2025-07-01
AI Technical Summary
When the battery cell fails or ages, it is difficult to disassemble and install and repair, resulting in a large amount of scrapping, making it difficult to achieve simple renovation and reuse.
The structural design includes a battery cell bracket and a conductive sheet. The conductive sheet has a current conduction area, through holes and pins. The pins can be bent for easy disassembly and welding. The battery cell is replaced by replacing the conductive sheet to avoid old welding marks.
The maintenance and reuse of the battery module is realized, the demand for overall replacement is reduced, and the maintenance and reuse rate of the battery module is improved.
Smart Images
Figure CN120237366A_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to a battery module, a conductive sheet, and a method for replacing a battery cell in a battery module. Background Art
[0002] With the requirements of corporate social responsibility and the green industry for environmental protection, the requirement for the reusability of battery modules is also increasing. When a battery module fails or the battery cells age, a large amount of time is required for disassembly and assembly with the current structure and connection method to repair or replace the battery cells, resulting in most battery modules being selected for scrapping. Therefore, there is an urgent need for a battery module structure that can be easily refurbished and repaired. Summary of the Invention
[0003] The present disclosure provides a battery module. The battery module includes a battery cell holder and a conductive sheet. The battery cell holder accommodates new battery cells and old battery cells. The old battery cell has a first welding position and a welding mark. The conductive sheet is electrically connected to the old battery cell at the first welding position. The new battery cell has a second welding position. The conductive sheet is electrically connected to the new battery cell at the second welding position.
[0004] The present disclosure provides a conductive sheet. The conductive sheet includes a current conduction region, a through hole, and a pin. The pin extends from the current conduction region towards the center of the through hole. The pin includes a welding portion and a trimming portion. The welding portion is used for welding a battery cell. The trimming portion is formed between the current conduction region and the welding portion and bends downward from the current conduction region towards the welding portion.
[0005] In some embodiments, the number of pins is two, and the long axes of the two pins are substantially parallel to each other.
[0006] In some embodiments, the number of pins is two, and the long axes of the two pins are substantially perpendicular to each other.
[0007] In some embodiments, the number of pins is four, and the long axes of two adjacent pins among the four pins are substantially perpendicular to each other.
[0008] The present disclosure provides a method for replacing a battery cell in a battery module. The method includes obtaining a battery module. The battery module includes a plurality of battery cells, a battery cell holder, and a conductive sheet. The conductive sheet includes a current conduction region, a through hole, and a pin. Each of the plurality of battery cells corresponds to a plurality of through holes. The plurality of pins extend from the current conduction region towards the center of each through hole to the plurality of battery cells. The method includes identifying an abnormal battery cell among the plurality of battery cells and normal battery cells that are connected in parallel with the abnormal battery cell. The method includes removing the conductive sheet corresponding to the abnormal battery cell and the normal battery cells, such that the normal battery cells have welding marks. The method includes, in the battery cell holder, replacing the abnormal battery cell with a replacement battery cell. The method includes welding a replacement conductive sheet to the normal battery cells and the replacement battery cell. The welding position of the replacement conductive sheet on the normal battery cell is different from the welding mark.
[0009] In some embodiments, before welding the replacement conductive sheet to the normal battery cell and replacing the battery cell, it further includes rotating the normal battery cell.
[0010] In some embodiments, the replacement conductive sheet is substantially the same as the conductive sheet.
[0011] In some embodiments, the pins of the replacement conductive sheet and the pins of the conductive sheet form an angle with each other, and the angle is greater than zero.
[0012] In some embodiments, the number of the multiple pins of the replacement conductive sheet is four, and the major axes of two adjacent pins among the four pins are substantially perpendicular to each other.
[0013] It should be understood that the foregoing general description and the following specific description are merely exemplary and explanatory and are intended to provide further explanation of the claimed disclosure. Description of the Drawings
[0014] By reading the following detailed description of the embodiments and referring to the drawings, the present disclosure can be more fully understood.
[0015] Figure 1A And Figure 1B are respectively perspective views of a battery module according to some embodiments of the present disclosure.
[0016] Figure 2 is a partial perspective view of a conductive sheet according to some embodiments of the present disclosure.
[0017] Figures 3A to 3D is a schematic view of a conductive sheet according to some embodiments of the present disclosure.
[0018] Figure 4 is a flowchart of a method for replacing a battery cell in a battery module according to some embodiments of the present disclosure.
[0019] Figures 5 to 8 are respectively schematic views of each step of replacing a battery cell in a battery module according to some embodiments of the present disclosure. Detailed Embodiments
[0020] The following will disclose multiple embodiments of the present disclosure with reference to the drawings. For the sake of clarity, many practical details will be described together in the following narrative. However, it should be understood that these practical details are not used to limit the present disclosure. That is to say, in some embodiments of the present disclosure, these practical details are not necessary. In addition, for the purpose of simplifying the drawings, some conventional structures and elements will be shown in a simple schematic manner in the drawings. Additionally, for the convenience of the reader to view, the dimensions of each element in the drawings are not drawn according to the actual scale.
[0021] Currently, the battery modules in use all connect the battery cells and the conductive sheets by welding. When a battery cell fails or ages and needs to be disassembled, it is extremely easy to cause a short circuit, which becomes a major difficulty point in reuse or repair. In addition, the battery cells connected by welding have been fused with the conductive sheets to form a eutectic, so when the conductive sheets are removed, they cannot be completely removed, and residues will remain on the battery cells. Such a flat surface is difficult to weld for the second time, so it is not easy to repair and reuse the battery module.
[0022] In view of the above, the structure and method for replacing the battery cells in the battery module will be described with reference to the accompanying drawings in this disclosure.
[0023] Please also refer to Figure 1A and Figure 1B . Figure 1A FIG. is a perspective view of a battery module 100 according to some embodiments of the present disclosure. Figure 1B FIG. is a perspective view of a battery module 100A according to some embodiments of the present disclosure. As Figure 1A shown, the battery module 100 includes a battery cell holder 110 and a conductive sheet 120. The battery cell holder 110 accommodates a plurality of battery cells 130. When some of the battery cells (i.e., abnormal battery cells 130A) in the battery module 100 are abnormal or damaged, the conductive sheet 120 can be removed, as Figure 1B shown, replace the abnormal battery cell 130A with a new battery cell 130N, and the old battery cell 130O is retained in the battery cell holder 110, and a new conductive sheet 120R is welded to connect the new battery cell 130N and the old battery cell 130O. In the battery module 100A, the battery cell holder 110 accommodates the new battery cell 130N and the old battery cell 130O. The old battery cell 130O has a first welding position D1 and a welding mark M1. The new conductive sheet 120R is electrically connected to the old battery cell 130O at the first welding position D1. The new battery cell 130N has a second welding position D2. The conductive sheet 120R is electrically connected to the new battery cell 130N at the second welding position D2. In this way, it is not necessary to replace the entire battery module 100, and the battery module 100 can be repaired and reused.
[0024] Please refer to Figure 2 . Figure 2Is a partial perspective view of the conductive sheet 120 according to some embodiments of the present disclosure. The conductive sheet 120 includes a current conduction region 120A, a through hole 120H, and a pin 120P. The pin 120P extends from the current conduction region 120A towards the center of the through hole 120H. The pin 120P includes a welding portion P1 and a trimming portion P2. The welding portion P1 is used for welding the battery cell 130. The trimming portion P2 is formed between the current conduction region 120A and the welding portion P1 and bends downward from the current conduction region 120A towards the welding portion P1. It should be noted that there is a gap between the trimming portion P2 and the battery cell 130 below it and it does not closely adhere to the battery cell 130. Therefore, maintenance personnel can easily cut the pin 120P from the trimming portion P2 to remove the conductive sheet 120 and replace the battery cell 130.
[0025] See Figures 3A to 3D 。 Figures 3A to 3D Is a schematic diagram of a conductive sheet according to some embodiments of the present disclosure. In some embodiments, as Figure 3A And Figure 3D Shown, the number of pins of the conductive sheet is two, and the major axes of the two pins are substantially parallel to each other. As Figure 3B Shown, the number of pins of the conductive sheet is two, and the major axes of the two pins are substantially perpendicular to each other. As Figure 3C Shown, the number of pins of the conductive sheet is four, and the major axes of two adjacent pins among the four pins are substantially perpendicular to each other. In some embodiments, the number or shape of the pins of the conductive sheet is any other. It should be noted that the multiple pins of the conductive sheet serve as multiple solder joints so that the conductive sheet can be reused.
[0026] Hereinafter, a method for replacing a battery cell in a battery module will be described in detail with reference to a top view schematic diagram of the battery module. Although a series of operations or steps are used hereinafter to illustrate the method disclosed herein, the order shown by these operations or steps should not be construed as a limitation of the present disclosure. For example, certain operations or steps can be performed in a different order and / or simultaneously with other steps. In addition, it is not necessary to perform all the illustrated operations, steps, and / or features to implement the embodiments of the present disclosure. In addition, each operation or step described herein can include several sub - steps or actions.
[0027] Please see Figure 4 。 Figure 4 Is a flowchart of a method for replacing a battery cell in a battery module according to some embodiments of the present disclosure. As Figure 4As shown, the method includes steps S1 to S5. In step S1, a battery module is obtained. The battery module includes a plurality of battery cells, a battery cell bracket, and a conductive sheet. The conductive sheet includes a current conduction region, a through hole, and a pin. Each of the plurality of battery cells corresponds to a plurality of through holes. A plurality of pins extend from the current conduction region to the centers of the respective through holes and then to the plurality of battery cells. In step S2, abnormal battery cells among the plurality of battery cells and normal battery cells in parallel with the abnormal battery cells are identified. In step S3, the conductive sheets corresponding to the abnormal battery cells and the normal battery cells are removed, so that the normal battery cells have welding marks. In step S4, in the battery cell bracket, the abnormal battery cells are replaced with replacement battery cells. In step S5, replacement conductive sheets are welded to the normal battery cells and the replacement battery cells. The welding positions of the replacement conductive sheets on the normal battery cells are different from the welding marks.
[0028] In this way, the entire battery module does not need to be replaced, and the battery module can be repaired and reused. In some embodiments, before welding the replacement conductive sheets to the normal battery cells and the replacement battery cells, since the replacement conductive sheets are substantially the same as the conductive sheets, steps S1 to S5 further include rotating the normal battery cells so that the welding positions of the normal battery cells that are repeatedly welded are different from the welding marks. In some embodiments, as Figure 3C shown in the conductive sheet 320C, the major axes of two adjacent pins among its four pins are substantially perpendicular to each other. When replacing the conductive sheet, it is not necessary to rotate the normal battery cells to avoid the welding marks. Similarly, the selection of the replacement conductive sheet and the conductive sheet can also be Figure 3A and Figure 3D a combination of the conductive sheet 320A and the conductive sheet 320D.
[0029] Please refer to Figure 5 . Figure 5 FIG. is a schematic diagram of each step of replacing battery cells in the battery module 500 according to some embodiments of the present disclosure. The replacement conductive sheet 520R is substantially the same as the conductive sheet 520. The number of pins of the conductive sheet 520 is two, and the major axes of the two pins are substantially parallel to each other. First, abnormal battery cells 530A among the plurality of battery cells and normal battery cells 530N in parallel with the abnormal battery cells 530A are identified. The conductive sheet 520 corresponding to the abnormal battery cells 530A and the normal battery cells 530N is removed, so that the normal battery cells 530N have welding marks M1 (old solder joints). Then, after replacing the abnormal battery cells 530A with replacement battery cells 530R in the battery cell bracket 510, the normal battery cells 530N are rotated to avoid the welding marks M1 (old solder joints), and the replacement conductive sheet 520R is welded to the normal battery cells 530N and the replacement battery cells 530R. The welding position M2 (new solder joint) of the replacement conductive sheet 520R on the normal battery cells 530N is different from the welding mark M1 (old solder joint).
[0030] Please refer to Figure 6 . Figure 6Schematic diagrams of steps for replacing cells in battery module 600 according to some embodiments of the present disclosure. The replacement conductive sheet 620R is substantially the same as the conductive sheet 620. The number of pins of the conductive sheet 620 is two, and the major axes of the two pins are substantially perpendicular to each other. First, identify the abnormal cell 630A among multiple cells and the normal cell 630N in parallel with the abnormal cell 630A. Remove the conductive sheet 620 corresponding to the abnormal cell 630A and the normal cell 630N, so that the normal cell 630N has a welding mark M1 (old solder joint). Next, in the cell holder 610, after replacing the cell 630R to replace the abnormal cell 630A, rotate the normal cell 630N to avoid the welding mark M1 (old solder joint), and weld the replacement conductive sheet 620R to the normal cell 630N and the replacement cell 630R. The welding position M2 (new solder joint) where the replacement conductive sheet 620R is welded to the normal cell 630N is different from the welding mark M1 (old solder joint).
[0031] Please refer to Figure 7 。 Figure 7 Schematic diagrams of steps for replacing cells in battery module 700 according to some embodiments of the present disclosure. The replacement conductive sheet 720R is substantially different from the conductive sheet 720. The replacement conductive sheet 720R and the conductive sheet 720 each have two pins. The pins of the replacement conductive sheet 720R and the pins of the conductive sheet 720 form an angle with each other, and the angle is greater than zero. First, identify the abnormal cell 730A among multiple cells and the normal cell 730N in parallel with the abnormal cell 730A. Remove the conductive sheet 720 corresponding to the abnormal cell 730A and the normal cell 730N, so that the normal cell 730N has a welding mark M1 (old solder joint). Next, in the cell holder 710, after replacing the cell 730R to replace the abnormal cell 730A, weld the replacement conductive sheet 720R to the normal cell 730N and the replacement cell 730R. The welding position M2 (new solder joint) where the replacement conductive sheet 720R is welded to the normal cell 730N is different from the welding mark M1 (old solder joint). Since the pins of the replacement conductive sheet 720R and the pins of the conductive sheet 720 form an angle with each other, it is not necessary to rotate the normal cell 730N during the process of replacing the conductive sheet.
[0032] Please refer to Figure 8 。 Figure 8Schematic diagrams of steps for replacing cells in battery module 800 according to some embodiments of the present disclosure. Replacement conductive sheet 820R is substantially the same as conductive sheet 820. The number of pins of replacement conductive sheet 820R is four, and the major axes of two adjacent pins among the four pins are substantially perpendicular to each other. First, identify abnormal cell 830A among the plurality of cells and normal cell 830N in parallel with abnormal cell 830A. Remove conductive sheet 820 corresponding to abnormal cell 830A and normal cell 830N, so that normal cell 830N has welding mark M1 (old solder joint). Then, in cell holder 810, after replacing abnormal cell 830A with replacement cell 830R, weld replacement conductive sheet 820R to normal cell 830N and replacement cell 830R. The welding position M2 (new solder joint) where replacement conductive sheet 820R is welded to normal cell 830N is different from welding mark M1 (old solder joint). Specifically, after removing conductive sheet 820, some pins of replacement conductive sheet 820R directly cover welding mark M1 (old solder joint) of normal cell 830N, and some other pins weld normal cell 830N at welding position M2 (new solder joint). Therefore, it is not necessary to rotate normal cell 830N during the process of replacing the conductive sheet.
[0033] In summary, the present disclosure provides a battery module, a conductive sheet, and a method for replacing cells in a battery module. When some cells in the battery module are abnormal or damaged, the conductive sheet can be removed, the abnormal cells can be replaced, and the old cells can be welded again. In this way, it is not necessary to replace the entire battery module, and the battery module can be repaired and reused.
[0034] Although the present disclosure has been described in considerable detail with reference to various embodiments, there may be other embodiments. Therefore, the spirit and scope of the appended claims should not be limited to the description of the embodiments included herein.
[0035] It will be apparent to those skilled in the art that various modifications and changes can be made to the structure of the present disclosure without departing from the scope or spirit of the present disclosure. In view of the foregoing, the present disclosure is intended to cover modifications and variations of the present disclosure that fall within the scope of the appended claims.
[0036]
Symbol Description
[0037] 100, 100A: Battery module
[0038] 110: Cell holder
[0039] 120, 120R: Conductive sheet
[0040] 120A: Current conduction area
[0041] 120H: Through hole
[0042] 120P: Pin
[0043] 130: Battery cell
[0044] 130A: Abnormal battery cell
[0045] 130N: New battery cell
[0046] 130O: Old battery cell
[0047] P1: Welding part
[0048] P2: Cutting part
[0049] D1: First welding position
[0050] D2: Second welding position
[0051] M1: Welding mark
[0052] M2: Welding position
[0053] 320A~320D: Conductive sheet
[0054] 500, 600, 700, 800: Battery module
[0055] 510, 610, 710, 810: Battery cell bracket
[0056] 520, 620, 720, 820: Conductive sheet
[0057] 520R, 620R, 720R, 820R: Replacement conductive sheet
[0058] 530A, 630A, 730A, 830A: Abnormal battery cell
[0059] 530N, 630N, 730N, 830N: Normal battery cell
[0060] 530R, 630R, 730R, 830R: Replacement battery cell
[0061] S1~S5: Steps
Claims
1. A battery module, characterized in that, Comprising: A cell holder for accommodating at least one new cell and at least one old cell; And A conductive sheet, wherein: The at least one old cell has a first welding position and a welding mark, and the conductive sheet is electrically connected to the at least one old cell at the first welding position; The at least one new cell has a second welding position, and the conductive sheet is electrically connected to the at least one new cell at the second welding position.
2. A conductive sheet, characterized in that, Comprising a current conduction region, a through hole and at least one pin, the at least one pin extending from the current conduction region towards the center of the through hole, wherein: The at least one pin includes: A welding portion for welding a cell; and A trimming portion formed between the current conduction region and the welding portion, bending downward from the current conduction region towards the welding portion.
3. The conductive sheet according to claim 2, wherein Wherein the number of the at least one pin is two, and the major axes of the two pins are substantially parallel to each other.
4. The conductive sheet according to claim 2, wherein, Wherein the number of the at least one pin is two, and the major axes of the two pins are substantially perpendicular to each other.
5. The conductive sheet according to claim 2, wherein Wherein the number of the at least one pin is four, and the major axes of two adjacent pins among the four pins are substantially perpendicular to each other.
6. A method for replacing a battery cell in a battery module, characterized in that, Comprising: Obtaining a battery module, including a plurality of cells, a cell holder and a conductive sheet, wherein the conductive sheet includes a current conduction region, a plurality of through holes and a plurality of pins, the plurality of cells respectively correspond to the plurality of through holes, and the plurality of pins respectively extend from the current conduction region towards the centers of the respective through holes to the plurality of cells; Identifying abnormal cells among the plurality of cells and paralleling at least one normal cell of the abnormal cells; Removing the conductive sheet corresponding to the abnormal cells and the at least one normal cell, so that the normal cell has a welding mark; In the cell holder, replacing the abnormal cell with a replacement cell; and Welding a replacement conductive sheet to the normal cell and the replacement cell, wherein the welding position of the replacement conductive sheet on the normal cell is different from the welding mark.
7. The method according to claim 6, wherein Before welding the replacement conductive sheet to the normal cell and the replacement cell, further comprising: Rotating the normal cell.
8. The method according to claim 7, wherein The replacement conductive sheet is substantially the same as the conductive sheet.
9. The method according to claim 6, characterized in that, Wherein the pins of the replacement conductive sheet and the pins of the conductive sheet form an included angle with each other, and the included angle is greater than zero.
10. The method according to claim 6, characterized in that Wherein the number of the plurality of pins of the replacement conductive sheet is four, and the major axes of two adjacent pins among the four pins are substantially perpendicular to each other.