battery
By installing fire extinguishing components near the battery explosion-proof valve, the fire source can be covered in time with fire extinguishing materials and the gas can be discharged smoothly, which solves the problem of fire spread when the battery explosion-proof valve explodes, and improves the safety and reliability of the battery.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CALB GROUP CO LTD
- Filing Date
- 2025-06-12
- Publication Date
- 2026-06-23
AI Technical Summary
When the battery explosion-proof valve bursts, the electrolyte sprays out, posing a significant safety hazard, especially as the fire spreads to the outside of the battery, endangering the user's safety.
A fire extinguishing assembly, including a bracket and a fire extinguishing unit, is installed near the explosion-proof valve of the battery. The fire extinguishing material is filled in the fire extinguishing unit. The bracket is provided with a clearance hole and a through hole. The ratio of the filling volume of the fire extinguishing material to the total volume of the clearance hole is between 0.13 and 0.8, ensuring that the fire extinguishing assembly can respond quickly and cover the fire source, while allowing high-pressure gas to be discharged smoothly.
It effectively prevents the fire from spreading, ensures that the fire extinguishing components do not affect the pressure relief effect when the explosion-proof valve is working, improves the safety and reliability of the battery, and prevents explosions caused by gas accumulation.
Smart Images
Figure CN224400389U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of new energy technology, specifically to a battery. Background Technology
[0002] When the battery explosion-proof valve bursts, the inside of the battery is under high temperature and high pressure. The electrolyte is a flammable substance that is prone to ignition. The ignited electrolyte will continue to spray out, posing a significant safety hazard. Utility Model Content
[0003] In view of this, the present invention provides a battery to solve the problem of continuous leakage of electrolyte when the battery is on fire, which poses a significant safety hazard.
[0004] This utility model provides a battery, comprising:
[0005] The housing has an explosion-proof valve installed on its first wall panel; a receiving cavity is formed inside the housing.
[0006] A fire extinguishing assembly is disposed on the side of the first wall panel facing the receiving cavity. In a direction perpendicular to the plane of the first wall panel, the projection of the fire extinguishing assembly toward the explosion-proof valve at least partially overlaps with the explosion-proof valve. The fire extinguishing assembly includes a bracket and a fire extinguishing unit mounted on the bracket, the fire extinguishing unit being adapted to be filled with fire extinguishing material.
[0007] The bracket has clearance holes, and the fire extinguishing unit has through holes in the area corresponding to the clearance holes.
[0008] The filling volume of the extinguishing material is V1, and the total volume of all clearance holes opened in the support is V2, satisfying: 0.13≤V1 / V2≤0.8.
[0009] Beneficial Effects: The fire extinguishing component is positioned on the side of the first wall panel facing the receiving cavity. Since the temperature inside the battery is higher than the outside, placing the fire extinguishing component on the inside allows for timely fire suppression. In a direction perpendicular to the plane of the first wall panel, the projection of the fire extinguishing component toward the explosion-proof valve at least partially overlaps with the valve. This arrangement ensures that when the explosion-proof valve bursts, the gas inside the battery will be ejected from the valve, meaning all the gas will pass through its location. This facilitates a rapid response from the fire extinguishing component, effectively covering the fire source and preventing its spread. The filling volume of the fire extinguishing material is V1, and the total volume of all clearance holes in the bracket is V2. By limiting the values of V1 / V2 to within the aforementioned range, sufficient fire extinguishing material is ensured, avoiding any impact on the fire extinguishing effect. Simultaneously, it ensures the rapid discharge of high-pressure gas, preventing interference with the normal operation of the explosion-proof valve and guaranteeing its pressure relief effect. This prevents explosions caused by gas accumulation, further enhancing the safety and reliability of the fire extinguishing system. Attached Figure Description
[0010] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0011] Figure 1 This is a schematic diagram of the battery of this utility model;
[0012] Figure 2 This is an exploded view of the battery of this utility model;
[0013] Figure 3 This is a schematic diagram of the first wall panel and the fire extinguishing assembly of this utility model;
[0014] Figure 4 This is a front view of the first wall panel and fire extinguishing assembly of this utility model;
[0015] Figure 5 for Figure 4 Schematic diagram of the BB section;
[0016] Figure 6 for Figure 5 Enlarged view of point A in the middle;
[0017] Figure 7 This is a cross-sectional view of the fire extinguishing unit of this utility model.
[0018] Explanation of reference numerals in the attached figures:
[0019] 1. Housing; 11. Receiving cavity; 2. Battery cell; 3. First wall panel; 31. Explosion-proof valve; 32. Protective plate;
[0020] 4. Fire extinguishing components; 41. Bracket; 411. Clearance hole; 412. Fixing part; 413. Extension part; 414. Mounting part; 42. Fire extinguishing unit; 421. Through hole; 422. Adhesive layer; 423. Fire extinguishing substance. Detailed Implementation
[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0022] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0024] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.
[0025] When a battery explosion-proof valve bursts, the battery interior is under high temperature and pressure. The electrolyte, being flammable, is prone to ignition. The continuously ejected, burning electrolyte can reach extremely high temperatures, sometimes as high as 1500°C, melting steel plates. This poses a significant challenge to integrated components and, when ejected towards the passenger compartment, can endanger user safety, creating a substantial safety hazard. Extinguishing the fire at its source, preventing it from igniting or reducing the fire to a very low level in the event of a battery runaway, would directly and fundamentally solve the problem of battery runaway danger.
[0026] The following is combined with Figures 1 to 7 The following describes embodiments of the present invention.
[0027] According to an embodiment of the present invention, a battery is provided, comprising:
[0028] The housing 1 has an explosion-proof valve 31 installed on its first wall panel 3; the housing 1 has an internal receiving cavity 11.
[0029] Fire extinguishing assembly 4 is disposed on the side of the first wall panel 3 facing the receiving cavity 11. In the direction perpendicular to the plane of the first wall panel 3, the projection of the fire extinguishing assembly 4 toward the explosion-proof valve 31 at least partially overlaps with the explosion-proof valve 31. The fire extinguishing assembly 4 includes a bracket 41 and a fire extinguishing unit 42 mounted on the bracket 41. The fire extinguishing unit 42 is adapted to be filled with fire extinguishing substance 423.
[0030] The bracket 41 is provided with a clearance hole 411, and the fire extinguishing unit 42 is provided with a through hole 421 in the area corresponding to the clearance hole 411.
[0031] The filling volume of the extinguishing agent 423 is V1, and the total volume of all the clearance holes 411 opened in the bracket 41 is V2, which satisfies: 0.13≤V1 / V2≤0.8.
[0032] In this embodiment, the first wall panel 3 can be one of the walls of the housing 1, or it can be a cover structure relatively independent of the main body of the housing 1. When the first wall panel 3 is one of the walls of the housing 1, the explosion-proof valve 31 is directly installed on that wall; when the first wall panel 3 is a cover structure, the explosion-proof valve 31 is installed on the cover. Regardless of the structure, it can ensure that the fire extinguishing assembly 4 can be quickly activated under the high temperature and high pressure conditions inside the battery, effectively suppressing the spread of fire.
[0033] The housing 1 has a cavity 11 inside, which is used to accommodate the battery cell 2.
[0034] The fire extinguishing component 4 is located on the side of the first wall panel 3 facing the receiving cavity 11. Since the temperature inside the battery is higher than that outside the battery, placing the fire extinguishing component 4 inside can effectively extinguish the fire in a timely manner.
[0035] In the direction perpendicular to the plane where the first wall panel 3 is located, the projection of the fire extinguishing component 4 toward the explosion-proof valve 31 at least partially overlaps with the explosion-proof valve 31; this arrangement ensures that when the explosion-proof valve 31 explodes, the gas inside the battery will be ejected from the explosion-proof valve 31, that is, all the gas will pass through the position of the explosion-proof valve 31, thereby facilitating the rapid response of the fire extinguishing component 4, effectively covering the fire source, and preventing the fire from spreading.
[0036] As a further option, the projection of the fire extinguishing assembly 4 toward the explosion-proof valve 31 in a direction perpendicular to the plane of the first wall panel 3 covers the explosion-proof valve 31. This improves fire extinguishing efficiency and prevents the fire from spreading to the outside of the battery.
[0037] The fire extinguishing assembly 4 includes a bracket 41 for easy fixation of the fire extinguishing unit 42. The bracket 41 has a clearance hole 411 to ensure smooth flow of high-pressure gas when the extinguishing agent 423 is released, avoid clogging the explosion-proof valve 31, and prevent the risk of explosion due to gas accumulation.
[0038] Since the high-pressure gas also needs to pass through the fire extinguishing unit 42 during ejection, a through hole 421 is also provided in the area corresponding to the avoidance hole 411 of the fire extinguishing unit 42 to ensure smooth gas passage and avoid obstruction of the high-pressure gas flow. This reduces gas flow resistance and improves fire extinguishing efficiency while meeting fire extinguishing requirements.
[0039] The filling volume of the extinguishing agent 423 is V1, and the total volume of all the clearance holes 411 opened in the bracket 41 is V2. By limiting the value of V1 / V2 to the above range, it can ensure that the extinguishing agent is sufficient and avoid affecting the extinguishing effect, while also ensuring that the high-pressure gas is discharged quickly, avoiding interference with the normal operation of the explosion-proof valve, ensuring the pressure relief effect of the explosion-proof valve, preventing explosion caused by gas accumulation, and further improving the safety and reliability of the fire extinguishing system.
[0040] Combination Figure 3 As shown, since the fire extinguishing unit 42 has a through hole 421, the filling volume V1 of the fire extinguishing material 423 specifically refers to the volume of the fire extinguishing material 423 contained in the space inside the fire extinguishing unit 42 that is not occupied by the through hole 421. V2 is the sum of the volumes of all the clearance holes 411 on the support 41.
[0041] For example, in this embodiment, the value of V1 / V2 can be 0.13 or 0.15 or 0.2 or 0.25 or 0.3 or 0.35 or 0.4 or 0.43 or 0.48 or 0.51 or 0.55 or 0.65 or 0.7 or 0.74 or 0.8, or it can be any range formed by any two of the above values.
[0042] In some embodiments, the value of V1 can be in the range of 30mm. 3 ≤V1≤255mm 3 .
[0043] For example, in this embodiment, the value of V1 can be 30mm. 3 Or 31.5mm 3 Or 38mm 3 Or 42mm 3 Or 56mm 3 Or 73mm 3 Or 88mm 3 Or 110mm 3 Or 130mm 3 Or 150mm 3 Or 180mm 3 Or 250mm 3 Or 255mm 3 "etc." can also be the range formed by any two of the above values.
[0044] In some embodiments, the value of V2 can be in the range of 120 mm. 3 ≤V2≤280mm 3 .
[0045] For example, in this embodiment, the value of V1 can be 120mm. 3 Or 125mm 3 Or 130mm3 Or 150mm 3 Or 158mm 3 Or 170mm 3 Or 195mm 3 Or 230mm 3 Or 260mm 3 Or 280mm 3 "etc." can also be the range formed by any two of the above values.
[0046] In some embodiments, combined with Figure 6 As shown, the bracket 41 includes:
[0047] The fixing part 412 is adapted to be fixed to the first wall panel 3;
[0048] Mounting section 414, fire extinguishing unit 42 is adapted to be installed in mounting section 414;
[0049] An extension 413 is disposed between the fixing part 412 and the mounting part 414 so that the fire extinguishing unit 42 is spaced apart from the first wall panel 3.
[0050] By providing an extension 413 between the fixing part 412 and the mounting part 414, the fire extinguishing unit 42 can be spaced apart from the first wall panel 3, thereby preventing interference with the normal opening of the explosion-proof valve 31 and ensuring that it can quickly release pressure in an emergency, avoiding malfunctions caused by physical contact. At the same time, the bracket 41 is provided with a clearance hole 411, and the fire extinguishing unit 42 is provided with a through hole 421 in the area corresponding to the clearance hole 411, thereby ensuring smooth gas flow during high-pressure gas ejection, allowing the gas to flow quickly to the explosion-proof valve 31 and effectively reducing the risk of gas accumulation.
[0051] In some optional embodiments, the material used for the bracket 41 has surface insulation properties, such as high-strength, heat-resistant plastic; the bracket 41 can also undergo surface insulation treatment, such as cationic oxidation or spraying; thereby improving the insulation effect of the bracket 41, preventing the bracket 41 from acting as a conductive medium and causing short circuits, and ensuring the safe operation of the fire extinguishing system in complex environments. Simultaneously, the insulation treatment also prevents the fire extinguishing substance 423 from reacting chemically with the bracket 41, extending its service life.
[0052] In some embodiments, combined with Figure 6 As shown, the mounting part 414 is arranged parallel to the explosion-proof valve 31;
[0053] In the direction perpendicular to the plane of the first wall panel 3, the distance between the mounting part 414 and the explosion-proof valve 31 is a, which satisfies: 0.04mm≤a≤6mm.
[0054] By controlling the spacing 'a' within the aforementioned range, it is ensured that the bracket 41 and the explosion-proof valve 31 do not interfere with each other, thereby preventing interference with the normal opening of the explosion-proof valve 31 and ensuring that it can quickly release pressure in an emergency, avoiding malfunctions caused by physical contact. This not only ensures the sensitive response of the explosion-proof valve 31 but also improves the overall stability of the fire extinguishing system.
[0055] For example, in this embodiment, the value of 'a' can be 0.04mm or 0.05mm or 0.1mm or 0.13mm or 0.21mm or 0.32mm or 0.55mm or 0.85mm or 1.05mm or 1.6mm or 2.1mm or 3.2mm or 4.3mm or 5mm or 6mm, or it can be any range formed by any two of the above values.
[0056] In some embodiments, in the direction perpendicular to the plane of the first wall panel 3, the area of a single clearance hole 411 is S0, satisfying: 2.5mm. 2 ≤S0≤55mm 2 .
[0057] By controlling the range of S0, the area of the clearance hole 411 is ensured to be moderate, preventing the clearance hole 411 from being too small and affecting the gas flow efficiency, effectively avoiding gas accumulation, and avoiding interference with the normal opening of the explosion-proof valve 31. At the same time, the area of the clearance hole 411 should not be too large, on the one hand to avoid weakening the structural strength due to the large area, and on the other hand to avoid the through hole 421 opened in the area of the fire extinguishing unit 42 corresponding to the clearance hole 411 being too large, resulting in a small proportion of fire extinguishing material, thus avoiding affecting the effective coverage of the fire extinguishing material and ensuring the fire extinguishing effect.
[0058] For example, in this embodiment, the value of S0 can be 2.5mm. 2 Or 5.5mm 2 Or 6.9mm 2 Or 8.3mm 2 or 10.4mm 2 Or 15mm 2 Or 19mm 2 Or 23mm 2 Or 33mm 2 Or 42mm 2 Or 55mm 2 "etc." can also be the range formed by any two of the above values.
[0059] In some embodiments, the fire extinguishing unit 42 includes an adhesive layer 422 and a fire extinguishing substance 423, wherein the adhesive layer 422 is adapted to fix the fire extinguishing substance 423 to the bracket 41.
[0060] The melting point of adhesive layer 422 is T, which satisfies the following condition: 110℃≤T≤530℃.
[0061] The fire extinguishing unit 42 includes an adhesive layer 422, such as acrylic structural adhesive, whose melting point range ensures that the adhesive layer 422 does not lose its function after reaching a predetermined temperature, thus preventing the fire extinguishing substance 423 from falling off prematurely and affecting the fire extinguishing effect.
[0062] In some embodiments, combined with Figure 7 As shown, the adhesive layer 422 is suitable for wrapping the extinguishing agent 423.
[0063] In this embodiment, the extinguishing agent 423 can be perfluorohexanone, which is liquid at room temperature. After the extinguishing agent 423 is wrapped by the adhesive layer 422, it can maintain a stable form, is not easy to volatilize, and is easy to fix.
[0064] In some embodiments, the extinguishing agent 423 is liquid at room temperature;
[0065] The materials used in extinguishing agent 423 include perfluorohexanone.
[0066] Perfluorohexanone has a melting point of 30°C to 90°C, ensuring it remains liquid at room temperature for easy storage and use. When the temperature rises to its melting point range, perfluorohexanone rapidly vaporizes, effectively covering the fire source, quickly suppressing the spread of flames, cooling the flames, and improving fire extinguishing efficiency.
[0067] Meanwhile, the low toxicity and environmentally friendly properties of perfluorohexanone mean that it has a relatively small impact on human health and the environment during fire extinguishing, meeting modern safety and environmental protection requirements.
[0068] The adhesive layer 422 is suitable for encapsulating the extinguishing substance 423. That is, the extinguishing unit 42 can be constructed as a capsule-shaped structure, presenting a capsule state in which the adhesive layer 422 encapsulates the extinguishing substance 423. When the adhesive layer 422 material is heated, it begins to soften in order to release the substance inside the capsule. The perfluorohexanone extinguishing gas that is heated and vaporized can isolate the air, thereby quickly extinguishing the fire source.
[0069] Among them, the fire extinguishing unit 42 can be a perfluorohexanone fire extinguishing microcapsule, which can be manufactured by: dissolving gelatin and montmorillonite in pure water to obtain a dispersion, dissolving sodium polyphosphate in pure water to obtain a coagulation liquid, adding liquid perfluorohexanone to the dispersion liquid and dispersing it evenly, and then adding the coagulation liquid and stirring to form an inner shell layer, adding polyisocyanate to the liquid perfluorohexanone forming the inner shell layer for curing, adding phenolic prepolymer for curing, and forming an outer shell layer, which is then washed, filtered, and dried to produce a perfluorohexanone fire extinguishing microcapsule.
[0070] In some embodiments, combined with Figure 6 As shown, the fire extinguishing unit 42 is located on the side of the mounting part 414 away from the first wall panel 3.
[0071] By placing the fire extinguishing unit 42 on the side of the mounting part 414 away from the first wall panel 3, it is ensured that the fire extinguishing unit 42 contacts the fire source before the bracket 41 and activates the fire extinguishing first. This ensures that the fire extinguishing material 423 is released rapidly near the fire source, effectively covering the burning area, blocking the spread of fire, and improving the fire extinguishing response speed and reliability of the overall structure.
[0072] In some embodiments, the fixing part 412 is welded or glued to the side surface of the first wall panel 3 facing the receiving cavity 11.
[0073] In some embodiments, combined with Figure 3 As shown, in a direction parallel to the plane where the first wall panel 3 is located, the fire extinguishing component 4 is hollowed out in at least a portion of its area so that an exhaust channel is formed between the first wall panel 3 and the fire extinguishing component 4.
[0074] By setting a perforated area in a direction parallel to the plane of the first wall panel 3, an exhaust channel is formed, which can increase air circulation and keep the air flowing smoothly so as to achieve smooth exhaust.
[0075] Additionally, a protective plate 32 is provided on the outside of the explosion-proof valve 31 to prevent external impurities or foreign objects from entering, ensuring the normal operation of the explosion-proof valve 31 and extending its service life.
[0076] Obviously, the above embodiments are merely examples for clear illustration and are not intended to limit the implementation. Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and all such modifications and variations fall within the scope defined by the present invention.
Claims
1. A battery, characterized in that, include: The housing (1) has an explosion-proof valve (31) installed on its first wall panel (3); the housing (1) has an internal cavity (11). A fire extinguishing assembly (4) is disposed on the side of the first wall panel (3) facing the receiving cavity (11). In a direction perpendicular to the plane of the first wall panel (3), the projection of the fire extinguishing assembly (4) toward the explosion-proof valve (31) overlaps at least partially with the explosion-proof valve (31). The fire extinguishing assembly (4) includes a bracket (41) and a fire extinguishing unit (42) mounted on the bracket (41). The fire extinguishing unit (42) is adapted to be filled with fire extinguishing material (423). The bracket (41) has a clearance hole (411), and the fire extinguishing unit (42) has a through hole (421) in the area corresponding to the clearance hole (411); The filling volume of the extinguishing material (423) is V1, and the total volume of all the clearance holes (411) opened on the bracket (41) is V2, satisfying: 0.13≤V1 / V2≤0.
8.
2. The battery according to claim 1, characterized in that, The support (41) includes: The fixing part (412) is adapted to be fixed to the first wall panel (3); Mounting part (414), wherein the fire extinguishing unit (42) is adapted to be installed in the mounting part (414); An extension (413) is provided between the fixing part (412) and the mounting part (414) so that the fire extinguishing unit (42) is spaced apart from the first wall panel (3).
3. The battery according to claim 2, characterized in that, The mounting part (414) is arranged parallel to the explosion-proof valve (31); In the direction perpendicular to the plane of the first wall panel (3), the distance between the mounting part (414) and the explosion-proof valve (31) is a, which satisfies: 0.04mm≤a≤6mm.
4. The battery according to claim 1, characterized in that, In the direction perpendicular to the plane of the first wall panel (3), the area of a single clearance hole (411) is S0, satisfying: 2.5 mm 2 ≤S0≤55mm 2 .
5. The battery according to claim 1, characterized in that, The fire extinguishing unit (42) includes an adhesive layer (422) and a fire extinguishing substance (423), wherein the adhesive layer (422) is adapted to fix the fire extinguishing substance (423) to the bracket (41); The melting point of the adhesive layer (422) is T, which satisfies: 110℃≤T≤530℃.
6. The battery according to claim 5, characterized in that, The adhesive layer (422) is adapted to encapsulate the fire extinguishing substance (423).
7. The battery according to claim 5, characterized in that, The extinguishing substance (423) is liquid at room temperature; The extinguishing agent (423) is made of perfluorohexanone.
8. The battery according to claim 2, characterized in that, The fire extinguishing unit (42) is located on the side of the mounting part (414) away from the first wall panel (3).
9. The battery according to claim 2, characterized in that, The fixing part (412) is welded or glued to the side surface of the first wall panel (3) facing the receiving cavity (11).
10. The battery according to claim 2, characterized in that, In a direction parallel to the plane of the first wall panel (3), the fire extinguishing component (4) is partially hollowed out to form an exhaust channel between the first wall panel (3) and the fire extinguishing component (4).