Battery cap body capable of preventing secondary power connection
By placing an isolation ring covering the air holes between the connecting aluminum sheet and the explosion-proof aluminum sheet of the battery cap body, the problem of secondary power connection during the battery incineration process is solved, and a safer battery incineration treatment is achieved.
Patent Information
- Application Number
- CN202421457417.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-25
- Publication Date
- 2025-05-13
- Estimated Expiration
- 2034-06-25
AI Technical Summary
The secondary power connection phenomenon that may exist during the incineration of the battery causes further increase in the internal pressure of the battery, which may cause serious safety hazards.
A battery cap body that prevents secondary electricity connection is designed. By configuring an isolation ring between the connecting aluminum sheet and the explosion-proof aluminum sheet, the isolation ring covers the outer ring and the air hole of the connecting aluminum sheet, and extends to the axis center line of the battery cap body to prevent secondary electricity connection.
It effectively prevents the occurrence of secondary power connection during the incineration process, and reduces the safety risk when the internal pressure of the battery increases sharply.
Smart Images
Figure CN222867944U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of power batteries, in particular to a battery cap body for preventing secondary electrical connection. Background Art
[0002] like Figure 1-2 As shown, when the battery is undergoing a burning experiment, the internal pressure of the battery gradually increases, the explosion-proof aluminum sheet 200 is first flipped over, and then cut off from the connecting aluminum sheet 100, forming a short circuit in the battery. The internal pressure continues to increase, pushing the entire connecting aluminum sheet upward, and the connecting aluminum sheet 100 passes through the isolation ring 300 and contacts the explosion-proof aluminum sheet 200 again, causing a secondary electrical connection phenomenon. Utility Model Content
[0003] In order to solve the technical problem of secondary connection of electricity that may exist in the battery during the incineration process in the prior art, the present application proposes a battery cap body that prevents secondary connection of electricity, which solves the above technical problem.
[0004] The technical solution adopted by the utility model to solve its technical problems is:
[0005] The utility model provides a battery cap body for preventing secondary electrical connection, comprising: a connecting aluminum sheet, one side of the connecting aluminum sheet is connected to a winding core inside a battery, and a central explosion-proof area on the other side is connected to the explosion-proof aluminum sheet; an explosion-proof aluminum sheet, on which explosion-proof engraved lines are provided; an isolation ring, which is arranged between the connecting aluminum sheet and the explosion-proof aluminum sheet, covers the outer ring of the connecting aluminum sheet and the air holes on the connecting aluminum sheet, and extends toward the axis of the battery cap body.
[0006] Furthermore, the isolation ring is provided with a vent hole at a position covering the air hole connected to the aluminum sheet.
[0007] Furthermore, a raised step is formed on a side of the inner ring of the isolation ring facing the explosion-proof aluminum sheet.
[0008] Furthermore, it also includes a steel cap, which is arranged on the side of the explosion-proof aluminum sheet facing away from the connecting aluminum sheet, and the steel cap is also provided with explosion-proof marking lines.
[0009] Based on the above technical solution, the technical effects that can be achieved by the utility model are:
[0010] In the battery cap body for preventing secondary electrical connection of the utility model, the isolation ring is arranged between the connecting aluminum sheet and the explosion-proof aluminum sheet, the isolation ring covers the outer ring of the connecting aluminum sheet and the air holes on the connecting aluminum sheet, and extends toward the axial line of the battery cap body. During the incineration experiment, the connecting aluminum sheet breaks again toward the area of the explosion-proof aluminum sheet at the air holes of the connecting aluminum sheet. In order to meet the requirement of rapid exhaust when the internal pressure of the battery increases, the air holes of the connecting aluminum sheet are usually designed with a larger angle, resulting in a lower strength at the connection between the holes. Therefore, at the moment when the internal pressure of the battery increases sharply, the part within the inner diameter of the hole will be broken and contact with the explosion-proof aluminum sheet, causing secondary electrical connection. Since the isolation ring has fully covered the air holes of the connecting aluminum sheet, when the connecting aluminum sheet breaks again, it can still be isolated between the connecting aluminum sheet and the explosion-proof aluminum sheet to prevent secondary electrical connection, thereby solving the technical problem of secondary electrical connection that may exist in the battery during the incineration process in the prior art.
[0011] The battery cap body for preventing secondary current connection of the utility model also includes a steel cap. A raised step is added to the inner circle of the isolation ring. After the explosion-proof aluminum sheet explodes, the explosion-proof aluminum sheet can be pressed against the inner surface of the steel cap to isolate the connection between the steel cap and the explosion-proof aluminum sheet and the connecting aluminum sheet, thereby playing a better role in preventing the phenomenon that the connecting aluminum sheet continues to deform and break after being cut off due to the increase of internal pressure of the battery, causing secondary current connection. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a schematic diagram of a battery cap in the prior art during the first stage of the incineration experiment;
[0013] Figure 2 It is a schematic diagram of the battery cap body generating secondary electricity in the second stage of the burning experiment in the prior art.
[0014] Among them: 100-connecting aluminum sheet; 200-explosion-proof aluminum sheet; 300-isolation ring.
[0015] Figure 3 It is a schematic diagram of the overall structure of the battery cap body for preventing secondary electrical connection of the utility model;
[0016] Figure 4 It is a schematic diagram of the first stage of the incineration experiment of the utility model for preventing secondary electrical connection;
[0017] Figure 5 This is a schematic diagram of the utility model for preventing secondary electrical connection in the second stage of the burning experiment.
[0018] In the utility model: 1-connecting aluminum sheet, 11-air hole; 2-explosion-proof aluminum sheet; 3-isolating ring, 31-air hole, 32-step; 4-steel cap; 5-explosion-proof engraved line. DETAILED DESCRIPTION
[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.
[0020] like Figure 3-5 As shown, the utility model provides a battery cap body for preventing secondary electrical connection, including a connecting aluminum sheet 1, an explosion-proof aluminum sheet 2 and an isolation ring 3, one side of the connecting aluminum sheet 1 is connected to the winding core inside the battery, and the central explosion-proof area of the other side is connected to the explosion-proof aluminum sheet 2, and an explosion-proof score line 5 is opened on the explosion-proof aluminum sheet 2. The isolation ring 3 is arranged between the connecting aluminum sheet 1 and the explosion-proof aluminum sheet 2, and the isolation ring 3 covers the outer ring of the connecting aluminum sheet 1 and the air hole 11 on the connecting aluminum sheet 1, and extends toward the axial line of the battery cap body.
[0021] In the battery cap body for preventing secondary electrical connection of the utility model, an isolation ring 3 is arranged between the connecting aluminum sheet 1 and the explosion-proof aluminum sheet 2, the isolation ring 3 covers the outer ring of the connecting aluminum sheet 1 and the air hole 11 on the connecting aluminum sheet 1, and extends toward the axial line of the battery cap body. During the incineration experiment, the connecting aluminum sheet 1 breaks again in the area toward the explosion-proof aluminum sheet 2 at the air hole 11 of the connecting aluminum sheet 1. In order to meet the requirement of rapid exhaust when the internal pressure of the battery increases, the air holes 31 of the connecting aluminum sheet 1 are usually designed with a larger angle, resulting in a lower strength at the connection between the holes. Therefore, at the moment when the internal pressure of the battery increases sharply, the part within the inner diameter of the hole will be broken and contact with the explosion-proof aluminum sheet 2, causing secondary electrical connection. Since the isolation ring 3 has fully covered the air hole 11 of the connecting aluminum sheet 1, when the connecting aluminum sheet 1 breaks again, it can still be isolated between the connecting aluminum sheet 1 and the explosion-proof aluminum sheet 2 to prevent secondary electrical connection, thereby solving the technical problem of secondary electrical connection that may exist in the battery during the incineration process in the prior art.
[0022] In a specific embodiment of the present invention, the isolation ring 3 is provided with a vent hole 31 at the position where the vent hole 11 connected to the aluminum sheet 1 is covered. The vent hole 31 is added to the isolation ring 3 in order not to affect the exhaust requirement inside the battery.
[0023] In a specific embodiment of the present invention, a raised step 32 is formed on the inner ring of the isolation ring 3 facing the explosion-proof aluminum sheet 2. The designed step 32 can increase the local thickness of the isolation ring 3, so that the isolation and insulation effect is better.
[0024] In a specific embodiment of the utility model, the battery cap body for preventing secondary connection of the utility model also includes a steel cap 4, which is arranged on the side of the explosion-proof aluminum sheet 2 facing away from the connecting aluminum sheet 1, and an explosion-proof engraved line 5 is also opened on the steel cap 4. During the explosion process, the steel cap 4 will also break, accelerating the gas transfer and preventing the internal expansion of the battery.
[0025] The battery cap body for preventing secondary electrical connection of the utility model also includes a steel cap 4. A raised step 32 is added to the inner circle of the isolation ring 3. After the explosion-proof aluminum sheet 2 explodes, the explosion-proof aluminum sheet 2 can be pressed against the inner surface of the steel cap 4 to isolate the connection between the steel cap 4 and the explosion-proof aluminum sheet 2 and the connecting aluminum sheet 1, thereby playing a better role in preventing the phenomenon that the connecting aluminum sheet 1 continues to deform and break after being cut off due to the increase of the internal pressure of the battery, causing secondary electrical connection.
[0026] It should be understood that the specific embodiments described above are only used to explain the present invention, and are not used to limit the present invention. Obvious changes or modifications derived from the spirit of the present invention are still within the scope of protection of the present invention.
Claims
1. A battery cap for preventing secondary current connection, characterized in that: include: A connecting aluminum sheet (1), wherein one side of the connecting aluminum sheet (1) is connected to the winding core inside the battery, and the central explosion-proof area of the other side is connected to the explosion-proof aluminum sheet (2); An explosion-proof aluminum sheet (2), wherein the explosion-proof aluminum sheet (2) is provided with an explosion-proof engraved line (5); An isolation ring (3), the isolation ring (3) is arranged between the connecting aluminum sheet (1) and the explosion-proof aluminum sheet (2), the isolation ring (3) covers the outer ring of the connecting aluminum sheet (1) and the air hole (11) on the connecting aluminum sheet (1), and extends toward the axis of the battery cap body.
2. The battery cap for preventing secondary current connection according to claim 1, characterized in that: The isolation ring (3) is provided with a vent hole (31) at a position covering the vent hole (11) of the connecting aluminum sheet (1).
3. The battery cap for preventing secondary current connection according to claim 1, characterized in that: A raised step (32) is formed on the side of the inner ring of the isolation ring (3) facing the explosion-proof aluminum sheet (2).
4. The battery cap for preventing secondary current connection according to claim 1, characterized in that: It also comprises a steel cap (4), which is arranged on the side of the explosion-proof aluminum sheet (2) facing away from the connecting aluminum sheet (1), and the steel cap (4) is also provided with an explosion-proof engraved line (5).