Pressure relief tab for ion battery test
By designing the tab structure, which includes a gas channel, an exhaust channel, and an expansion filler, the safety hazards caused by the rise in gas pressure during ion battery testing are solved, enabling rapid pressure relief and safe venting, thus ensuring battery safety.
Patent Information
- Application Number
- CN202520282411.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-21
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2035-02-21
AI Technical Summary
In ion battery tests, a rapid increase in internal gas pressure can lead to expansion or rupture, or even fire or explosion. Existing technologies are unable to effectively depressurize the battery, posing a safety hazard.
An electrode structure was designed, which includes an air passage, an exhaust passage, an expansion packing, and an emergency air passage. By utilizing the thermal expansion characteristics of the expansion packing and the pressure-type automatic opening structure, rapid pressure relief can be achieved to prevent the accumulation of high-temperature and high-pressure gas.
It achieves stable exhaust under normal conditions and rapid pressure relief under abnormal conditions, reducing safety risks and preventing safety accidents caused by the accumulation of high-temperature and high-pressure gases.
Smart Images
Figure CN223598968U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to battery test equipment technical field, concretely relates to a kind of pressure relief tab for ion battery test. BACKGROUND
[0002] With the increasing demand for clean energy around the world, ion batteries, such as lithium-ion batteries, are increasingly widely used in various electronic devices. However, ion batteries can generate gas during charging and discharging, especially under extreme conditions such as overcharging, overdischarging, and temperature changes. The internal gas pressure of the battery can rise sharply, causing the battery to expand or rupture, and even potentially causing fires or explosions. During research and development testing, the battery may generate multiple high-pressure gases due to the need to simulate different conditions. Therefore, a corresponding pressure relief structure needs to be designed to quickly release the internal pressure of the battery to prevent the battery case from being damaged and reduce the risk of high pressure caused by gas accumulation. SUMMARY
[0003] The utility model aims at the defects and deficiencies of prior art, provides a kind of pressure relief tab for ion battery test, which can solve the above-mentioned defects.
[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: it contains tab, the tab is opened with air passage for exhaust, the lateral side of the tab is opened with exhaust passage, the top end of the tab is opened with recess communicating with air passage, the bottom of the recess is provided with heat conduction block, the upper side of the heat conduction block is provided with expansion filler, the top of the expansion filler is provided with plugging block, the exhaust passage is located at the side edge position below the heat conduction block, a plurality of emergency air passages are provided below the exhaust passage in the tab, the emergency air passages are all communicated to the air passage, and the emergency air passages are provided with pressure type automatic opening structure.
[0005] Preferably, the emergency air passage is in the shape of an inverted "Z", and the pressure type automatic opening structure includes a sliding groove formed in the front of the horizontal portion of the upper end of the emergency air passage. A sliding block is slidably installed in the sliding groove, and a spring is provided at the rear end of the sliding block. Under normal conditions, the sliding block is blocked at the bend of the emergency air passage after the spring is stretched.
[0006] Preferably, high-performance breathable membranes are provided on both sides of the tab.
[0007] Preferably, the expansion filler is expanded graphite.
[0008] Preferably, the recess, heat conduction block, expansion filler, and plugging block are all in the shape of a "middle" character.
[0009] After adopting the above structure, the utility model has the following advantages:
[0010] 1. The utility model discloses a gas channel and exhaust channel, under normal circumstances can through the exhaust channel and discharge gas, and a plurality of pressure type automatic opening structure can open automatically when the air pressure rises, so that the gas can be discharged quickly, keep the pressure stability inside the gas channel.
[0011] 2. The utility model discloses the expansion filler, utilize the expansion filler heat expansion's characteristic, when the battery failure leads to produce a large amount of gas and produce high temperature, can quickly tear the pole ear top end, prop open, to make the gas channel top end open, force expansion gas discharge channel, to guarantee also can carry out pressure relief under extreme condition, prevent the security risk that the high temperature high pressure gas gathers leads to. BRIEF DESCRIPTION OF DRAWINGS
[0012] Figure 1 It is the structure schematic diagram of the utility model inside;
[0013] Figure 2 It is Figure 1 The enlarged view of A part in
[0014] Figure 3 It is the structure schematic diagram of the utility model when the slider opens;
[0015] Figure 4 It is the plan view of the utility model.
[0016] BRIEF DESCRIPTION OF DRAWINGS
[0017] 1, the pole ear;2, the gas channel;3, the heat conduction block;4, the expansion filler;5, the obturator block;6, the exhaust channel;7, the emergency gas channel;8, the slider;9, the sliding slot;10, the spring;11, the high performance gas permeable membrane. DETAILED DESCRIPTION
[0018] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model, obviously, the described embodiments only are a part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skill in the art without making the creative labor all belong to the range of protection of the utility model.
[0019] Referring to Figures 1-3As shown, it comprises a tab 1, a gas passage 2 for exhaust gas is opened in the tab 1, an exhaust passage 6 is opened in the side of the tab 1, a groove is opened in the top end of the tab 1 and communicates with the gas passage 2, a heat conduction block 3 is arranged at the bottom of the groove, an expanded filler 4 is arranged above the heat conduction block 3, a blocking block 5 is arranged at the top of the expanded filler 4, the exhaust passage 6 is located at the side below the heat conduction block 3, a plurality of emergency gas passages 7 are arranged below the exhaust passage 6 in the tab 1, the emergency gas passages 7 all communicate into the gas passage 2, a pressure type automatic opening structure is arranged in the emergency gas passage 7, and high-performance breathable membranes 11 are arranged on both sides of the tab 1.
[0020] The emergency gas passage 7 is in the shape of an inverted "Z", and the pressure type automatic opening structure comprises a sliding groove 9 which is opened in front of the horizontal part of the upper end of the emergency gas passage 7, a sliding block 8 which is slidingly installed in the sliding groove 9, and a spring 10 which is arranged at the rear end of the sliding block 8; under normal conditions, the spring 10 is stretched and the sliding block 8 is blocked at the bend of the emergency gas passage 7.
[0021] The expanded filler 4 is expanded graphite.
[0022] The shapes of the groove, the heat conduction block 3, the expanded filler 4 and the blocking block 5 are all in the shape of a "middle" character.
[0023] The principle and use process of the utility model are as follows:
[0024] After the tab 1 is installed and used, the normal exhaust gas generated by the battery can pass through the gas passage 2 and be quickly discharged from the exhaust passage 6 through the high-performance breathable membrane 11, so that the pressure in the gas passage 2 is stable, and the high-performance breathable membrane 11 can prevent liquid in the battery from leaking.
[0025] When the battery has a problem, a large amount of gas is generated in a short time, but the temperature does not rise, which will cause the gas pressure in the gas passage 2 to rapidly rise, the gas pressure will push the sliding block 8 outward, compress the spring 10, the sliding block 8 cannot continue to block, the emergency gas passage 7 is opened, and the gas is discharged from the exhaust passage 6 and the plurality of opened emergency gas passages 7 at the same time, so that the pressure is released and the pressure is prevented from being too high.
[0026] When the battery has a problem during operation, a large amount of gas is generated, and the temperature rises sharply, because the gas is continuously discharged through the exhaust passage 6, the flowing gas will conduct heat to the tab 1 and the heat conduction block 3, the heat conduction block 3 will transmit the heat to the expanded filler 4, when the temperature exceeds a specified value, the expanded filler 4 will expand, because the tab 1 has a "middle" character-shaped groove at the top, the middle part of the two ends is weak, when the expanded filler 4 expands, the tab 1 will be torn and opened from the middle to the two sides, so that the tab 1 forms a "Y" shape, that is, the top end of the gas passage 2 is opened, so that the high-temperature gas can be quickly discharged therefrom, and the danger caused by the gathering of high-temperature gas is prevented.
[0027] It should be understood that the above specific embodiments of the present application are only used for illustrative or explanatory purposes of the principles of the present application, and do not constitute a limitation on the present application. Therefore, any modification, equivalent replacement, improvement, etc. made without departing from the spirit and scope of the present application shall be included in the protection scope of the present application. In addition, the appended claims of the present application are intended to cover all changes and modifications falling within the scope and boundaries of the appended claims, or the equivalent forms of such scope and boundaries.
Claims
1. A pressure relief tab for ion battery testing, comprising a tab (1), characterized in that: The tab (1) is provided with an air passage (2) for exhausting gas. An exhaust passage (6) is provided on the side of the tab (1). A groove communicating with the air passage (2) is provided at the top of the tab (1). A heat conducting block (3) is provided at the bottom of the groove. An expansion filler (4) is provided above the heat conducting block (3). A sealing block (5) is provided at the top of the expansion filler (4). The exhaust passage (6) is located at the lower side position of the heat conducting block (3). A plurality of emergency air passages (7) are provided in the tab (1) below the exhaust passage (6). The emergency air passages (7) are all connected to the air passage (2) inside. A pressure type automatic opening structure is provided in the emergency air passages (7).
2. The pressure relief tab for ion battery testing according to claim 1, characterized in that: The emergency air passage (7) is in an inverted "Z" shape. The pressure type automatic opening structure includes a chute (9) provided directly in front of the upper horizontal part of the emergency air passage (7). A slider (8) is slidably installed in the chute (9). A spring (10) is provided at the rear end of the slider (8). In the normal state, after the spring (10) extends, the slider (8) seals the bend of the emergency air passage (7).
3. The pressure relief tab for ion battery testing according to claim 2, characterized in that: High-performance breathable membranes (11) are provided on both sides of the tab (1).
4. A pressure relief tab for ion battery testing according to claim 3, characterized in that: The expansion filler (4) is expanded graphite.
5. A pressure relief tab for ion battery testing according to claim 4, characterized in that: The shapes of the groove, the heat conducting block (3), the expansion filler (4), and the sealing block (5) are all in a "middle" shape.