TCO protection tab suitable for laminated cell
By designing TCO protective electrodes suitable for laminated battery cells, using the combined structure of the flow tape, overload protector and ear glue, the problem of excessive volume of the existing TCO protection device is solved, and the thermal runaway of the battery cells is achieved The rapid response and safety performance are improved, while maintaining the length of the extreme ears, which has a wide range of application prospects.
Patent Information
- Application Number
- CN202420512430.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-15
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2034-03-15
AI Technical Summary
The existing TCO protection device is not suitable for batteries with larger ear sizes in stacked batteries due to its large size, which leads to the risk of thermal runaway and fire and explosion when the battery cell is abnormal or damaged.
A TCO protective electrode ear suitable for laminated battery cells is designed. The device includes a flow guide belt, an overload protector and an ear glue. By installing an overload protector on the ear main body and wrapping it in the ear glue, it forms a Dual-channel structure enables rapid response to thermal runaway and circuit cutoff.
It effectively reduces the structural volume of TCO, enhances the safety performance of the battery cell, and maintains the length of the battery cell ears after packaging, and does not interfere with the subsequent PACK of the battery cell. Through the distinction between the width of the extreme ear and the appearance of the extreme ear glue, the rapid distinction between positive and negative electrodes is achieved, and a wide application foundation is provided.
Smart Images
Figure CN222440806U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of battery technology, and in particular to a TCO protective tab suitable for a laminated battery cell. Background Art
[0002] When the battery cell has process abnormalities or is damaged by external forces, the positive and negative electrodes are in direct contact and short-circuited, which can easily lead to dangerous accidents such as fire and explosion due to thermal runaway, posing a safety risk. Generally, a TCO overload protector (thermal overload relay or temperature control switch) is used to limit thermal runaway. When the temperature reaches the preset value, the conductivity of the TCO will suddenly drop, forming a similar circuit breaker protection effect. The guide plates on both sides of the existing TCO protection device are too large and are not suitable for laminated batteries with large tab sizes. Utility Model Content
[0003] In order to solve the above technical problems, the utility model provides a TCO protective tab suitable for stacked battery cells, which can effectively reduce the structural volume of the TCO, while enhancing the safety performance of the battery cell, keeping the length of the battery cell tab unchanged after packaging, and not interfering with the subsequent PACK of the battery cell.
[0004] The technical solution provided by the utility model is as follows:
[0005] A TCO protective tab suitable for a laminated battery cell comprises a TCO protective tab body, wherein the TCO protective tab body comprises a tab body, a guide strip is provided at one end of the tab body, overload protectors are provided at the left and right ends of the guide strip respectively, and the guide strip and the two overload protectors form a double channel; tab glue is provided between the tab body and the guide strip, and the tab glue wraps the double channel.
[0006] Furthermore, the overload protector is respectively connected to the guide strip and the tab body through insulating glue.
[0007] Furthermore, the TCO protection tab body is installed on the high potential side of the positive electrode of the battery, and the negative electrode of the battery is installed with an existing normal tab.
[0008] Furthermore, the ear glue has a two-stage structure.
[0009] Furthermore, the width of the tab body after the overload protector is installed is greater than that of an existing normal tab.
[0010] The present application has the following advantages over the prior art:
[0011] The TCO protection tabs for laminated cells of the present application effectively improve the safety of the cells without changing the tab lengths. Meanwhile, the TCO protection tabs are only wider because they carry an overload protector, and the tab lengths are no different from those of ordinary tabs. After packaging, the positive / negative electrodes can be distinguished by the width of the exposed tabs and the segmented tab glue. The width of the TCO protection tabs and the appearance changes of the tab glue can effectively distinguish electrodes using different tabs, and have a broad application base. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0013] Figure 1 This is a schematic diagram of the structure of the TCO protection tab suitable for the laminated battery cell in the embodiment of the utility model;
[0014] Figure 2 It is a schematic diagram of the structure of the TCO protection tab assembly suitable for the laminated battery cell in the embodiment of the utility model;
[0015] Figure 3 It is a schematic structural diagram of the TCO protection tab application suitable for laminated battery cells in an embodiment of the utility model.
[0016] Reference numerals:
[0017] 1. TCO protects the tab body; 11. Tab body; 12. Guide strip; 13. Overload protector; 14. Tab glue; 15. Insulation glue; 2. Normal tab. DETAILED DESCRIPTION
[0018] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.
[0019] like Figure 1-3As shown, an embodiment of the utility model provides a TCO protective tab suitable for a laminated battery cell, including a TCO protective tab body 1, the TCO protective tab body 1 including a tab body 11, a guide strip 12 is provided at one end of the tab body 11, overload protectors 13 are provided at the left and right ends of the guide strip 12, the guide strip 12 and the two overload protectors 13 form a double channel; a tab glue 14 is provided between the tab body 11 and the guide strip 12, and the tab glue 4 wraps the double channel.
[0020] In this embodiment, the overload protector 13 is connected to the guide strip 12 and the tab body 11 respectively through the insulating glue 15. The insulating glue 15 sticks the overload protector 13 to the guide strip 12. The overload protector 13 is close to the bare battery cell tab body 11, and can respond more quickly to the temperature changes caused by thermal runaway to cut off the circuit, thereby improving safety.
[0021] In this embodiment, the TCO protective tab body 1 is installed on the high potential side of the positive electrode of the battery, and the negative electrode of the battery is installed with an existing normal tab, which can realize the rapid distinction between the positive and negative electrodes. The TCO protective tab suitable for laminated battery cells in this embodiment has broad application prospects in the field of sodium ion batteries where aluminum foil is used for both the positive and negative electrodes.
[0022] In this embodiment, the tab glue 14 is a two-stage structure, and its appearance is different from that of normal tab glue, so that the positive / negative poles of the battery cell can be quickly distinguished.
[0023] In this embodiment, the width of the tab body 11 after the overload protector 13 is installed is greater than that of the existing normal tab. The different appearance from the normal tab can realize the rapid distinction between the positive and negative poles of the battery cell.
[0024] The TCO protective tabs suitable for stacked battery cells of this embodiment effectively reduce the structural volume of the TCO, maintain the length of the tabs of the battery cells after packaging while enhancing the safety performance of the battery cells, do not interfere with the subsequent PACK of the battery cells, and effectively improve the safety of the battery cells without changing the length of the tabs of the battery cells. At the same time, the width of the TCO protective tabs and the changes in the appearance of the tab glue can effectively distinguish between electrodes using different tabs, and have a broad application base.
[0025] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be 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 invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A TCO protective tab suitable for laminated battery cells, characterized in that: The invention comprises a TCO protected tab body (1), wherein the TCO protected tab body (1) comprises a tab body (11), a guide strip (12) is provided at one end of the tab body (11), overload protectors (13) are provided at the left and right ends of the guide strip (12), and the guide strip (12) and the two overload protectors (13) form a double channel; and tab glue (14) is provided between the tab body (11) and the guide strip (12), and the tab glue (14) wraps the double channel.
2. The TCO protection tab for laminated battery cells according to claim 1, characterized in that: The overload protector (13) is respectively connected to the guide strip (12) and the tab body (11) via insulating glue (15).
3. The TCO protection tab for laminated battery cells according to claim 1, characterized in that: The TCO protection tab body (1) is installed on the high potential side of the positive electrode of the battery, and the negative electrode of the battery is installed with an existing normal tab (2).
4. The TCO protection tab for laminated battery cells according to claim 1, characterized in that: The ear glue (14) is a two-stage structure.
5. The TCO protection tab for laminated battery cells according to claim 1, characterized in that: The width of the tab body (11) after the overload protector (13) is installed is greater than that of the existing normal tab (2).