Battery explosion-proof valve protection structure and battery

Abstract

The application provides a battery explosion-proof valve protection structure and a battery, and relates to the technical field of batteries. The battery explosion-proof valve protection structure comprises a cover shell and a first partition. The cover shell is used for covering at least the explosion-proof valve of the battery and is in sealed connection with the battery. The first partition is arranged in the cover shell and divides the inner cavity of the cover shell into a first cavity and a second cavity, and the explosion-proof valve is located in the first cavity. A first through hole is formed in the first partition, and the first cavity and the second cavity are communicated through the first through hole. A second through hole is formed in the side of the second cavity away from the first partition, and the second through hole is located on one side in the radial direction of the exhaust port of the explosion-proof valve. Once thermal runaway occurs in the battery, the high-temperature gas discharged by the explosion-proof valve will be discharged through the discharge channel defined by the first cavity, the first through hole, the second cavity and the second through hole, so that the discharge of the high-temperature gas has directionality and cannot be sprayed without direction, thereby reducing the harm after discharge, avoiding personnel injury to a certain extent and improving the use safety.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery explosion-proof valve protection structure and a battery. Background Technology

[0002] With the widespread application of batteries in automobiles and energy storage, battery safety performance is a crucial indicator for battery evaluation. Explosion-proof valves, as safety components, are typically installed on the battery box. Their main function is to open promptly to release pressure in the event of battery failure and gas generation, ensuring that the internal pressure of the battery does not become too high and lead to an explosion.

[0003] However, when a battery experiences thermal runaway, the high-temperature gas inside the battery box will be ejected in all directions through the explosion-proof valve, which can easily cause personal injury and has poor safety. Utility Model Content

[0004] This application provides a battery explosion-proof valve protection structure and battery to improve the problem of the explosion-proof valve spraying high-temperature gas in all directions after the battery experiences thermal runaway, thereby avoiding personal injury to a certain extent and improving the safety of use.

[0005] In a first aspect, this application provides a battery explosion-proof valve protection structure, including a housing and a first partition. The housing is used to cover at least the battery explosion-proof valve and is sealed to the battery. The first partition is disposed inside the housing and divides the inner cavity of the housing into a first cavity and a second cavity, with the explosion-proof valve located in the first cavity; a first through hole is provided on the first partition, and the first cavity and the second cavity communicate through the first through hole. A second through hole communicating with the outside is provided on the side of the second cavity opposite to the first partition, and the second through hole is located on the radial side of the exhaust port of the explosion-proof valve.

[0006] The battery explosion-proof valve protection structure provided in this application includes a cover that at least covers the battery's explosion-proof valve, creating a sealed connection between the cover and the battery. A first partition is placed inside the cover, dividing the cover's inner cavity into a first chamber and a second chamber, with the explosion-proof valve located in the first chamber. A first through-hole is formed on the first partition, connecting the first and second chambers. A second through-hole, communicating with the outside, is formed on the side of the second chamber opposite to the first partition, and is located radially towards the exhaust port of the explosion-proof valve. Because the cover covers the explosion-proof valve and is sealed to the battery, and because the cover has a second through-hole communicating with the outside, the cover effectively constricts the gas discharged from the explosion-proof valve when the battery fails and generates gas. Furthermore, since the explosion-proof valve is located within the first chamber, and the first chamber is connected to the second chamber via the first through-hole, while the second chamber is connected to the outside via the second through-hole, the first chamber, the first through-hole, the second chamber, and the second through-hole form a discharge channel, allowing the casing to guide the gas discharged from the explosion-proof valve. Therefore, once the battery experiences thermal runaway, the high-temperature gas inside the battery, after being discharged from the explosion-proof valve, will be discharged through the discharge channel jointly defined by the first chamber, the first through-hole, the second chamber, and the second through-hole. In other words, the high-temperature gas generated by battery failure will be discharged along the pre-set discharge channel within the casing. The discharge of high-temperature gas is directional and will not be sprayed haphazardly, thereby reducing the hazards after the high-temperature gas is discharged, avoiding personal injury to a certain extent, and improving the safety of use.

[0007] Furthermore, as the high-temperature gas flows through the exhaust channel, it comes into contact with the walls of both the first and second chambers. Therefore, the walls of both chambers slow down and depressurize the high-temperature gas, and can also offset some of its energy, thereby further reducing the hazards caused by the exhaust of the high-temperature gas and further improving its safety.

[0008] In one possible design, the first separator is located on one side of the exhaust port in the radial direction, so that the second cavity is located on one side of the exhaust port in the radial direction.

[0009] With the above-described scheme, the first separator is arranged on one side of the exhaust port in the radial direction, thus placing the second cavity on the same radial side as the exhaust port, i.e., on one side of the explosion-proof valve in the circumferential direction. Since the explosion-proof valve is located within the first cavity, the second and first cavities are arranged radially along the exhaust port of the explosion-proof valve. Therefore, the high-temperature gas injected by the explosion-proof valve onto the cavity wall on the side of the first cavity away from the explosion-proof valve must be deflected within the first cavity before entering the second cavity through the second through-hole. Compared to the scheme where the second cavity is arranged on one side of the explosion-proof valve in the axial direction, this increases the flow path of the high-temperature gas within the first cavity, prolongs the contact time between the high-temperature gas and the first cavity, thereby enhancing the deceleration and pressure reduction effect of the battery explosion-proof valve protection structure of this application on the high-temperature gas, offsetting more of the energy of the high-temperature gas, and further reducing the hazards after the high-temperature gas is discharged.

[0010] In one possible design, the first separator has a centerline along the direction from the side of the housing facing the battery to the side of the housing away from the battery, and a first through hole is located on the side of the centerline facing the battery.

[0011] By employing the above-described design, the first through-hole is positioned closer to the battery on the first separator, further increasing the flow path of the high-temperature gas within the first cavity and extending the contact time between the high-temperature gas and the first cavity. This enhances the deceleration and pressure reduction effect of the battery explosion-proof valve protection structure of this application on the high-temperature gas, further reducing the energy released after the high-temperature gas is discharged. Furthermore, it facilitates the entry of high-temperature gas from the first through-hole into the second cavity, improving the smoothness and safety of the high-temperature gas flow within the casing.

[0012] In one possible design, the side of the second cavity facing away from the first partition is open, and the open side is formed as a second through hole.

[0013] With the above solution, the side of the second cavity away from the first separator is set as an open opening, which is the second through hole. This allows the high-temperature gas entering the second cavity to be discharged more quickly, improving the discharge efficiency of the high-temperature gas. This enables the high-temperature gas generated by battery failure to be discharged in a timely manner, ensuring timely depressurization of the battery and high depressurization efficiency. This avoids phenomena such as battery fire and explosion, further ensuring safety.

[0014] In one possible design, the first partition is located below the explosion-proof valve, so that the second chamber is located below the explosion-proof valve.

[0015] With the above scheme, the first separator is positioned below the explosion-proof valve, so that the second chamber is also located below the explosion-proof valve. Furthermore, since the second through-hole is located on the side of the second chamber opposite to the first separator, i.e., below the second chamber, this arrangement allows high-temperature gas to exit downwards through the second through-hole, improving emission safety. On the other hand, if the high-temperature gas carries particles, it facilitates the discharge of the particles under gravity, improving the ease of particle emission.

[0016] In one possible design, the first separator is angled within the housing.

[0017] By using the above scheme, the first separator is inclinedly placed inside the casing. This increases the wall area of ​​both the first and second cavities while maintaining the same casing structure. Consequently, the contact area between the high-temperature gas and both cavities is increased. This further increases the energy and speed consumed by the high-temperature gas during its flow within the first and second cavities, thereby enhancing the deceleration and depressurization effect of the first and second cavities on the high-temperature gas and reducing the hazards caused by the exhaust of the high-temperature gas.

[0018] In one possible design, the first partition is a baffle.

[0019] The above solution sets the first separator as a partition, which is simple in structure, easy to manufacture, and convenient to assemble.

[0020] In one possible design, the first through hole is located on one side of the exhaust port in the radial direction, and the first through hole and the second through hole are located on the same side of the explosion-proof valve.

[0021] By arranging the first through hole on one side of the radial direction of the exhaust port, the high-temperature gas discharged through the exhaust port of the explosion-proof valve will not be directly discharged through the first through hole after entering the first cavity. This prolongs the flow time of the high-temperature gas in the first cavity and increases the contact time between the high-temperature gas and the first cavity. As a result, the energy consumed and the speed of the high-temperature gas during its flow in the first cavity are increased, further enhancing the deceleration and pressure reduction effect of the battery explosion-proof valve protection structure of this application on the high-temperature gas, thereby further reducing the hazards after the high-temperature gas is discharged.

[0022] In one possible design, there are at least two explosion-proof valves, and the battery explosion-proof valve protection structure also includes at least one second partition. The second partition is disposed in the first cavity and intersects with the first partition to divide the first cavity into at least two sub-cavities. Each sub-cavity is connected to the second cavity through a first through hole, and one sub-cavity corresponds to one explosion-proof valve.

[0023] With the above solution, when the battery is equipped with at least two explosion-proof valves, the battery explosion-proof valve protection structure of this application also includes at least one second partition in the first cavity, and the second partition intersects with the first partition. The second partition divides the first cavity into at least two sub-cavities, and an explosion-proof valve can be arranged in each sub-cavity. In this way, the battery explosion-proof valves can be arranged in different sub-cavities. That is, each explosion-proof valve is in its corresponding sub-cavity. With this arrangement, the second partition isolates two adjacent explosion-proof valves, so that the high-temperature gas discharged from each explosion-proof valve has a preset discharge path in the first cavity, thereby avoiding the interference and resonance of high-temperature gas generated by multiple explosion-proof valves, and improving safety.

[0024] In one possible design, the first through hole includes at least two sub-holes, which are spaced apart along the arrangement direction of the plurality of explosion-proof valves, and each sub-cavity is provided with at least one sub-hole.

[0025] With the above scheme, multiple sub-holes are set on the first partition, and the multiple sub-holes are spaced apart along the arrangement direction of the multiple explosion-proof valves, so that each sub-cavity has at least one sub-hole. In this way, each sub-cavity is connected to the second cavity through its corresponding sub-hole, so that the high-temperature gas discharged from each explosion-proof valve can enter the second cavity through the corresponding sub-hole, which is orderly and safer.

[0026] In one possible design, the battery explosion-proof valve protection structure also includes a sealing plate. The sealing plate covers the side of the housing facing the battery and seals at least the first cavity. The sealing plate has a clearance opening at the position corresponding to the first cavity for the explosion-proof valve to pass through. The sealing plate is connected to at least one of the housing and the battery.

[0027] With the above solution, a sealing plate is arranged on the side of the casing facing the battery. The sealing plate at least blocks the first cavity, and a clearance opening is provided at the position of the sealing plate corresponding to the first cavity for the explosion-proof valve to pass through. The setting of the sealing plate not only improves the sealing performance of the first cavity, allowing the high-temperature gas entering the first cavity to be discharged through the second cavity and the second through hole, ensuring that the high-temperature gas is discharged along the preset discharge channel, further ensuring the directionality of the high-temperature gas discharge, but also enhances the structural strength of the casing, which helps to extend the service life of the battery explosion-proof valve protection structure of this application.

[0028] Secondly, this application provides a battery, including the battery explosion-proof valve protection structure as described above.

[0029] The beneficial effects of the battery provided in the second aspect and the various possible designs of the second aspect can be found in the first aspect and the various possible implementations of the first aspect, and will not be repeated here. Attached Figure Description

[0030] Figure 1 This is an isometric view of a battery according to an embodiment of this application.

[0031] Figure 2 This is an assembly diagram of a battery according to an embodiment of this application.

[0032] Figure 3 for Figure 2 Enlarged view of part A in the middle.

[0033] Figure 4 Axonometric view of the battery explosion-proof valve protection structure according to an embodiment of this application. Figure 1 .

[0034] Figure 5 Axonometric view of the battery explosion-proof valve protection structure according to an embodiment of this application. Figure 2 .

[0035] Figure 6 Axonometric view of the battery explosion-proof valve protection structure according to an embodiment of this application. Figure 3 .

[0036] Figure 7 Axonometric view of the battery explosion-proof valve protection structure according to an embodiment of this application. Figure 4 .

[0037] Figure 8 Axonometric view of the battery explosion-proof valve protection structure according to an embodiment of this application. Figure 5 .

[0038] Explanation of reference numerals in the attached drawings: 100, Battery explosion-proof valve protective structure; 1, Cover; 2, First partition; 3, First cavity; 31, Sub-cavity; 4, Second cavity; 5, First through hole; 51, Sub-hole; 6, Second through hole; 7, Sealing plate; 71, Circumvention opening; 8, Second partition; 200, Battery; 201, Explosion-proof valve; 202, Housing; 203, Battery cell. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims and drawings of this application are intended to cover non-exclusive inclusion.

[0041] The term "embodiment" as used herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of the phrase "embodiment" in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0042] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists, A and B exist simultaneously, or B exists. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0043] The directional terms appearing in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of the battery explosion-proof valve protection structure or the battery of this application. For example, in the description of this application, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figures. They are only for the convenience of describing this application 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. Therefore, they should not be construed as limitations on this application.

[0044] Furthermore, the terms "first," "second," etc., in the specification and claims of this application or in the aforementioned drawings are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.

[0045] In the description of this application, unless otherwise stated, "multiple" means two or more (including two), and similarly, "multiple groups" means two or more (including two groups).

[0046] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, "connection" or "joining" in mechanical structures can refer to a physical connection. A physical connection can be a fixed connection, such as a connection secured by screws, bolts, or other spacers; a physical connection can also be a detachable connection, such as a snap-fit ​​or interlocking connection; a physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0047] With the widespread application of batteries in automobiles and energy storage, battery safety performance is a crucial indicator for battery evaluation. Explosion-proof valves, as safety components, are typically installed on the battery box. Their main function is to open promptly to release pressure in the event of battery failure and gas generation, ensuring that the internal pressure of the battery does not become too high and lead to an explosion.

[0048] However, when a battery experiences thermal runaway, the high-temperature gas inside the battery box will be ejected in all directions through the explosion-proof valve, which can easily cause personal injury and has poor safety.

[0049] Based on this, this embodiment provides a battery explosion-proof valve protection structure and a battery. A cover is provided, at least covering the battery's explosion-proof valve and sealingly connecting it to the battery. A first partition is provided inside the cover, dividing the inner cavity of the cover into a first cavity and a second cavity. The explosion-proof valve is located in the first cavity. A first through-hole is formed on the first partition, connecting the first cavity and the second cavity. A second through-hole, connecting to the outside, is formed on the side of the second cavity opposite to the first partition. Therefore, once the battery experiences thermal runaway, the high-temperature gas inside the battery, after being discharged through the explosion-proof valve, will exit through the emission channel defined by the first cavity, the first through-hole, the second cavity, and the second through-hole. In other words, the high-temperature gas generated by battery failure will exit along the pre-set emission channel inside the cover, making the emission of high-temperature gas directional and preventing random spraying, thereby reducing the hazards after the high-temperature gas is discharged, avoiding personal injury to a certain extent, and improving safety in use.

[0050] The following detailed description, with reference to the accompanying drawings and specific embodiments, illustrates a battery explosion-proof valve protection structure and battery provided in this embodiment.

[0051] refer to Figures 1 to 3 As shown, this embodiment provides a battery 200, which includes an explosion-proof valve 201, a housing 202, a battery cell 203, and a battery explosion-proof valve protection structure 100.

[0052] The battery cell 203 is installed inside the housing 202, and the explosion-proof valve 201 is installed on one side of the housing 202. The side of the explosion-proof valve 201 facing away from the battery cell 203 is exposed outside the housing 202.

[0053] The battery explosion-proof valve protection structure 100 covers at least the explosion-proof valve 201 and is sealed to the housing 202. The battery explosion-proof valve protection structure 100 isolates the explosion-proof valve 201 from the outside, thus protecting the explosion-proof valve 201.

[0054] In actual use, if the battery 200 experiences thermal runaway, the explosion-proof valve 201 will open in time, and the high-temperature gas in the housing 202 will flow from the explosion-proof valve 201 into the battery explosion-proof valve protection structure 100, and be discharged along the preset discharge channel in the battery explosion-proof valve protection structure 100. This makes the discharge of high-temperature gas directional, so that the high-temperature gas will not be sprayed in an undirected manner, thereby reducing the hazards after the high-temperature gas is discharged, avoiding personal injury to a certain extent, and improving the safety of use.

[0055] refer to Figures 1 to 6 As shown, this embodiment provides a battery explosion-proof valve protection structure 100, which includes a cover 1 and a first separator 2.

[0056] For details, please refer to Figures 1 to 3 As shown, the housing 1 is used to cover at least the explosion-proof valve 201 of the battery 200 and is sealed to the battery 200. A first partition 2 is disposed inside the housing 1, dividing the inner cavity of the housing 1 into a first cavity 3 and a second cavity 4. The explosion-proof valve 201 is located in the first cavity 3. A first through hole 5 is provided on the first partition 2, through which the first cavity 3 and the second cavity 4 communicate. A second through hole 6 communicating with the outside is provided on the side of the second cavity 4 opposite to the first partition 2, and the second through hole 6 is located on the radial side of the exhaust port of the explosion-proof valve 201.

[0057] In some implementations, the casing 1 can be welded to the battery 200's housing, providing a stable connection and good sealing. In other implementations, the casing 1 can also be connected to the battery 200 using bolts or other fasteners, facilitating installation, disassembly, and replacement.

[0058] During specific assembly, a sealing element, such as a sealing strip, can be provided on the side of the cover 1 facing the battery 200. The sealing element is arranged circumferentially between the cover 1 and the battery 200 to ensure good sealing between the cover 1 and the battery 200.

[0059] In practice, the first separator 2 and the housing 1 can be integrally formed, resulting in good integrity, high structural strength, and easy assembly of the battery explosion-proof valve protection structure 100. Alternatively, the first separator 2 can also be connected inside the housing 1 by welding, structural adhesive bonding, or other methods.

[0060] In some implementations, the first through hole 5 can be a strip-shaped hole, and the length direction of the strip-shaped hole can intersect with the center line of the exhaust port of the explosion-proof valve 201, so that high-temperature gas can enter the second cavity 4 from the first cavity 3.

[0061] Of course, in other implementations, the first through hole 5 can also be a circular hole, a diamond-shaped hole, etc.

[0062] For specific implementation, refer to Figure 3 As shown, the second through hole 6 can be opened on the cavity wall of the second cavity 4 on the side opposite to the first partition 2. In this way, the first through hole 5 and the second through hole 6 are respectively located on two opposite cavity walls of the second cavity 4, and the high-temperature gas that enters the second cavity 4 through the first through hole 5 can be discharged to the outside more quickly.

[0063] Of course, the second cavity 4 has a cavity wall adjacent to the first partition 2 and located on the side of the second cavity 4 away from the battery 200, and the second through hole 6 can also be formed on the cavity wall, for example.

[0064] The battery explosion-proof valve protection structure 100 provided in this embodiment includes a cover 1 that covers at least the explosion-proof valve 201 of the battery 200, creating a sealed connection between the cover 1 and the battery 200. A first partition 2 is disposed inside the cover 1, dividing the inner cavity of the cover 1 into a first cavity 3 and a second cavity 4, with the explosion-proof valve 201 located within the first cavity 3. A first through hole 5 is provided on the first partition 2, connecting the first cavity 3 and the second cavity 4. A second through hole 6, communicating with the outside, is provided on the side of the second cavity 4 opposite to the first partition 2, and is located radially on the exhaust port of the explosion-proof valve 201. Because the cover 1 covers the explosion-proof valve 201 and is sealed to the battery 200, and because the cover 1 has the second through hole 6 communicating with the outside, the cover 1 has a constricting effect on the gas discharged from the explosion-proof valve 201 when the battery 200 fails and generates gas. Since the explosion-proof valve 201 is located inside the first cavity 3, and the first cavity 3 is connected to the second cavity 4 through the first through hole 5, and the second cavity 4 is connected to the outside through the second through hole 6, the first cavity 3, the first through hole 5, the second cavity 4, and the second through hole 6 form a discharge channel, allowing the casing 1 to guide the gas discharged from the explosion-proof valve 201. Therefore, once the battery 200 experiences thermal runaway, the high-temperature gas inside the battery 200, after being discharged from the explosion-proof valve 201, will be discharged through the discharge channel jointly defined by the first cavity 3, the first through hole 5, the second cavity 4, and the second through hole 6. In other words, the high-temperature gas generated by the failure of the battery 200 will be discharged along the preset discharge channel inside the casing 1 (see reference). Figure 3 As shown in the curve, the emission of high-temperature gas is directional and does not spray in an undirected manner, thereby reducing the harm caused by the emission of high-temperature gas, avoiding personal injury to a certain extent, and improving the safety of use.

[0065] Furthermore, as the high-temperature gas flows through the exhaust channel, it comes into contact with the walls of the first chamber 3 and the second chamber 4. Therefore, the walls of the first chamber 3 and the second chamber 4 both slow down and depressurize the high-temperature gas, and can also offset some of the energy of the high-temperature gas, thereby further reducing the harm caused by the exhaust of the high-temperature gas and further improving the safety of use.

[0066] Meanwhile, since the second through hole 6 is located on one side of the radial direction of the exhaust port of the explosion-proof valve 201, that is, the second through hole 6 is located on one side of the explosion-proof valve 201, the high-temperature gas discharged through the second through hole 6 is located on one side of the explosion-proof valve 201. In other words, the high-temperature gas is discharged from the circumferential side of the explosion-proof valve 201, which further ensures the directionality of the high-temperature gas discharge and thus further ensures safety.

[0067] refer to Figure 2 and Figure 3As shown, in some embodiments, the first partition 2 is located on one side of the exhaust port in the radial direction, so that the second cavity 4 is located on one side of the exhaust port in the radial direction.

[0068] By arranging the first separator 2 on one side of the exhaust port in the radial direction, the second cavity 4 is located on one side of the exhaust port in the radial direction, that is, the second cavity 4 is located on one side of the explosion-proof valve 201 in the circumferential direction. Since the explosion-proof valve 201 is located inside the first cavity 3, the second cavity 4 and the first cavity 3 are arranged radially along the exhaust port of the explosion-proof valve 201. Therefore, the high-temperature gas injected by the explosion-proof valve 201 onto the cavity wall on the side away from the explosion-proof valve 201 must be deflected within the first cavity 3 before entering the second cavity 4 through the second through hole 6. Compared with the scheme where the second cavity 4 is arranged on one side of the explosion-proof valve 201 in the axial direction, this increases the flow path of the high-temperature gas in the first cavity 3 and prolongs the contact time between the high-temperature gas and the first cavity 3, thereby improving the deceleration and pressure reduction effect of the battery explosion-proof valve protection structure 100 in this embodiment on the high-temperature gas, offsetting more of the energy of the high-temperature gas, and further reducing the hazard after the high-temperature gas is discharged.

[0069] At the same time, it not only saves the space occupied by the battery explosion-proof valve protection structure 100 in the axial direction of the exhaust port, making it easier to install and arrange the battery explosion-proof valve protection structure 100, but also conforms to the miniaturization design of the battery 200. Moreover, with the same overall space occupied by the battery 200, it can provide more space for the battery cells of the battery 200, which is conducive to improving the driving range of the battery 200.

[0070] For example, refer to Figure 2 and Figure 3 As shown, in some embodiments, the first partition 2 is located below the explosion-proof valve 201, so that the second cavity 4 is located below the explosion-proof valve 201.

[0071] The first partition 2 is positioned below the explosion-proof valve 201, so that the second chamber 4 is located below the explosion-proof valve 201. Since the second through-hole 6 is located on the side of the second chamber 4 opposite to the first partition 2, i.e., below the second chamber 4, this arrangement allows high-temperature gas to be discharged downwards through the second through-hole 6, improving emission safety. Furthermore, if the high-temperature gas carries particles, it facilitates the discharge of the particles under gravity, improving the ease of particle discharge.

[0072] refer to Figures 3 to 5 As shown, in some embodiments, along the direction from the side of the housing 1 facing the battery 200 to the side of the housing 1 away from the battery 200 (refer to...) Figure 3 , Figure 4 and Figure 5 In the X direction, the first separator 2 has a centerline (reference). Figure 4 and Figure 5 (The dashed line L in the middle), the first through hole 5 is located on the side of the center line facing the battery 200.

[0073] By positioning the first through-hole 5 closer to the battery 200 on the first separator 2, the flow path of the high-temperature gas within the first cavity 3 is further increased, extending the contact time between the high-temperature gas and the first cavity 3. This improves the deceleration and pressure reduction effect of the battery explosion-proof valve protection structure 100 in this embodiment on the high-temperature gas, further reducing the energy after the high-temperature gas is discharged. Furthermore, it facilitates the entry of the high-temperature gas from the first through-hole 5 into the second cavity 4, enhancing the smoothness and safety of the high-temperature gas flow within the casing 1.

[0074] refer to Figures 3 to 5 As shown, in some embodiments, the side of the second cavity 4 facing away from the first partition 2 is open, and the open is formed as a second through hole 6.

[0075] By setting the side of the second cavity 4 away from the first partition 2 as an open opening, which is the second through hole 6, the high-temperature gas entering the second cavity 4 can be discharged more quickly, improving the discharge efficiency of the high-temperature gas. This allows the high-temperature gas generated by the failure of the battery 200 to be discharged in time, enabling the battery 200 to depressurize more quickly and with higher depressurization efficiency. This avoids the battery 200 from catching fire or exploding, further ensuring safety.

[0076] In other embodiments, the side of the second cavity 4 facing away from the first dividing member has a blocked cavity wall, and the second through hole 6 is formed on the cavity wall to realize the communication between the second cavity 4 and the outside, so that the high temperature gas entering the second cavity 4 can be discharged to the outside of the cover 1.

[0077] refer to Figures 3 to 6 As shown, in some embodiments, the first partition 2 is inclined inside the housing 1.

[0078] The first partition 2 is inclinedly arranged inside the housing 1. This increases the cavity wall area of ​​the first cavity 3 and the cavity wall area of ​​the second cavity 4, while keeping the structure of the housing 1 the same. This increases the contact area between the high-temperature gas and the first cavity 3 and the second cavity 4, thereby increasing the energy and speed consumed by the high-temperature gas during its flow in the first cavity 3 and the second cavity 4. This further enhances the deceleration and depressurization effect of the first cavity 3 and the second cavity 4 on the high-temperature gas, and further reduces the harm caused by the high-temperature gas after it is discharged.

[0079] For specific implementation, refer to Figure 3 and Figure 4 As shown, along the side of the casing 1 facing the battery 200 to the side of the casing 1 away from the battery 200 (reference) Figure 3 In the direction along the X-axis (from left to back), the first segment can be tilted towards the direction closer to the second cavity 4.

[0080] In other implementations, refer to Figure 5 As shown, along the side of the casing 1 facing the battery 200 to the side of the casing 1 away from the battery 200 (reference) Figure 5 In the direction along the X-axis (from left to back), the first segment can be tilted towards the direction closer to the first cavity 3.

[0081] refer to Figures 3 to 6 As shown, in some embodiments, the first partition 2 is a partition plate, which has a simple structure, is easy to manufacture, and is convenient to assemble.

[0082] In practice, the partitions are made of high-temperature resistant materials, such as aluminum, stainless steel, and carbon fiber.

[0083] refer to Figures 3 to 6 As shown, in some embodiments, the first through hole 5 is located on one side of the exhaust port in the radial direction, and the first through hole 5 and the second through hole 6 are located on the same side of the explosion-proof valve 201.

[0084] By arranging the first through hole 5 on one side of the exhaust port in the radial direction, the high-temperature gas discharged through the exhaust port of the explosion-proof valve 201 will not be directly discharged from the first through hole 5 after entering the first cavity 3. This prolongs the flow time of the high-temperature gas in the first cavity 3 and increases the contact time between the high-temperature gas and the first cavity 3. As a result, the energy consumed and the speed of the high-temperature gas during the flow process in the first cavity 3 are increased, which further enhances the deceleration and pressure reduction effect of the battery explosion-proof valve protection structure 100 in this embodiment on the high-temperature gas, and further reduces the hazards after the high-temperature gas is discharged.

[0085] Meanwhile, the first through hole 5 and the second through hole 6 are arranged on the same side of the explosion-proof valve 201, so that after the high-temperature gas enters the second cavity 4 through the first through hole 5, it can be discharged from the second through hole 6 in a timely manner, thereby improving the emission efficiency of the high-temperature gas.

[0086] In some embodiments, the orthogonal projection of the first through hole 5 onto the battery 200 is directly opposite the explosion-proof valve 201.

[0087] By aligning the orthographic projection of the first through-hole 5 onto the battery 200 with the explosion-proof valve 201, the overlap between the first through-hole 5 and the explosion-proof valve 201 along the radial direction of the valve is relatively large. This facilitates the flow of high-temperature gas, maintaining the pressure within the first cavity 3 within a preset range and ensuring high safety for the explosion-proof valve 201. Furthermore, when the first through-hole 5 is positioned below the explosion-proof valve 201, particles carried by the high-temperature gas entering the first cavity 3 are easily discharged through the first through-hole 5 under the influence of gravity, improving the ease of particle discharge.

[0088] In a specific implementation, the size of the orthogonal projection of the first through hole 5 onto the battery 200 along the radial direction of the explosion-proof valve 201 is larger than the maximum radial size of the explosion-proof valve 201. This facilitates the entry of high-temperature gas into the second chamber 4 through the first chamber 3, which helps to improve the emission efficiency of high-temperature gas and makes the pressure relief efficiency of the explosion-proof valve 201 higher.

[0089] In some embodiments, reference Figure 7 As shown, when the battery 200 is equipped with multiple explosion-proof valves 201, the size of the first cavity 3 along the arrangement direction of the multiple explosion-proof valves 201 can be made larger. This allows multiple explosion-proof valves 201 to be arranged in the first cavity 3, resulting in a simple structure and easy assembly.

[0090] In some embodiments, reference Figure 8 As shown, there are at least two explosion-proof valves 201, and the battery explosion-proof valve protection structure 100 also includes at least one second partition 8. The second partition 8 is disposed in the first cavity 3 and intersects with the first partition 2 to divide the first cavity 3 into at least two sub-cavities 31. Each sub-cavity 31 is connected to the second cavity 4 through the first through hole 5, and one sub-cavity 31 corresponds to one explosion-proof valve 201.

[0091] In other words, when the battery 200 is equipped with multiple explosion-proof valves 201, the first cavity 3 inside the housing 1 can, for example, be equipped with multiple second partitions 8. These second partitions 8 are spaced apart within the first cavity 3 along the arrangement direction of the multiple explosion-proof valves 201, dividing the first cavity 3 into multiple sub-cavities 31, with each explosion-proof valve 201 corresponding to one sub-cavity 31. After the housing 1 and the battery 200 are connected in place, each explosion-proof valve 201 is located within its corresponding sub-cavity 31.

[0092] The first cavity 3 is divided into multiple sub-cavities 31 by the second separator 8, so that each explosion-proof valve 201 is arranged in its corresponding sub-cavity 31. In this way, the explosion-proof valves 201 of the battery 200 can be arranged in different sub-cavities 31. That is, each explosion-proof valve 201 is in its corresponding sub-cavity 31. With this arrangement, the second separator 8 isolates two adjacent explosion-proof valves 201, so that the high-temperature gas discharged by each explosion-proof valve 201 has a preset discharge path in the first cavity 3. This avoids the high-temperature gas generated by multiple explosion-proof valves 201 from interfering with each other and causing resonance, thereby improving safety.

[0093] For example, refer to Figure 8 As shown, the battery 200 has two explosion-proof valves 201. A second partition 8 is provided in the first cavity 3 of the housing 1, which divides the first cavity 3 into two sub-cavities 31. The two explosion-proof valves 201 are located in the two sub-cavities 31 respectively.

[0094] refer to Figure 8 As shown, in some embodiments, the first through hole 5 includes at least two sub-holes 51, which are spaced apart along the arrangement direction of the plurality of explosion-proof valves 201, and each sub-cavity 31 is provided with at least one sub-hole 51.

[0095] By setting multiple sub-holes 51 on the first partition 2, and the multiple sub-holes 51 are spaced apart along the arrangement direction of the multiple explosion-proof valves 201, each sub-cavity 31 has at least one sub-hole 51. In this way, each sub-cavity 31 is connected to the second cavity 4 through its corresponding sub-hole 51, so that the high-temperature gas discharged from each explosion-proof valve 201 can enter the second cavity 4 through the corresponding sub-hole 51, resulting in orderly discharge and higher safety.

[0096] refer to Figure 6 As shown, in some embodiments, the battery explosion-proof valve protection structure 100 further includes a sealing plate 7. The sealing plate 7 covers the side of the housing 1 facing the battery 200 and at least seals the first cavity 3. The sealing plate 7 has an opening 71 at the position corresponding to the first cavity 3 for the explosion-proof valve 201 to pass through. The sealing plate 7 is connected to at least one of the housing 1 and the battery 200.

[0097] By arranging a sealing plate 7 on the side of the casing 1 facing the battery 200, the sealing plate 7 at least blocks the first cavity 3, and the sealing plate 7 has an opening 71 at the position corresponding to the first cavity 3 for the explosion-proof valve 201 to pass through. The setting of the sealing plate 7 not only improves the sealing performance of the first cavity 3, allowing the high-temperature gas entering the first cavity 3 to be discharged through the second cavity 4 and the second through hole 6, ensuring that the high-temperature gas is discharged along the preset discharge channel, further ensuring the directionality of the high-temperature gas discharge, but also enhances the structural strength of the casing 1, which helps to extend the service life of the battery explosion-proof valve protection structure 100 in this embodiment.

[0098] In practice, the shape of the clearance opening 71 can match the outer contour of the explosion-proof valve 201. This way, when the explosion-proof valve 201 is inserted into the clearance opening 71, the fit between the two is good, which improves the sealing performance between them.

[0099] In some implementations, the sealing plate 7 can be integrally formed with the housing 1, resulting in good integrity and high structural strength. Of course, in other implementations, the sealing plate 7 can also be connected to the housing 1 by welding, bolts, or other methods.

[0100] In some other implementations, the cover plate 7 can be mounted on the casing of the battery 200 for easy assembly.

Claims

1. A battery explosion-proof valve protection structure, characterized in that, Includes the casing and the first partition; The cover is used to at least cover the explosion-proof valve of the battery and to be sealed to the battery; The first partition is disposed inside the housing and divides the inner cavity of the housing into a first cavity and a second cavity. The explosion-proof valve is located in the first cavity. A first through hole is provided on the first partition, and the first cavity and the second cavity are connected through the first through hole. The second cavity has a second through hole on the side opposite to the first partition that communicates with the outside, and the second through hole is located on the radial side of the exhaust port of the explosion-proof valve.

2. The battery explosion-proof valve protection structure according to claim 1, characterized in that, The first separator is located on one side of the exhaust port in the radial direction, so that the second cavity is located on one side of the exhaust port in the radial direction.

3. The battery explosion-proof valve protection structure according to claim 2, characterized in that, The first separator has a centerline along a direction from the side of the housing facing the battery to the side of the housing away from the battery, and the first through hole is located on the side of the centerline facing the battery.

4. The battery explosion-proof valve protection structure according to claim 2, characterized in that, The side of the second cavity opposite to the first partition is open, and the open side is formed as the second through hole; And / or, the first partition is located below the explosion-proof valve, so that the second cavity is located below the explosion-proof valve.

5. The battery explosion-proof valve protection structure according to claim 1, characterized in that, The first separator is inclinedly disposed within the housing; And / or, the first separator is a partition.

6. The battery explosion-proof valve protection structure according to claim 1, characterized in that, The first through hole is located on one side of the exhaust port in the radial direction, and the first through hole and the second through hole are located on the same side of the explosion-proof valve.

7. The battery explosion-proof valve protection structure according to claim 1, characterized in that, The explosion-proof valve is at least two, and the battery explosion-proof valve protection structure also includes at least one second separator; The second partition is disposed in the first cavity and intersects with the first partition to divide the first cavity into at least two sub-cavities. Each sub-cavity is connected to the second cavity through the first through hole, and each sub-cavity corresponds to one explosion-proof valve.

8. The battery explosion-proof valve protection structure according to claim 7, characterized in that, The first through hole includes at least two sub-holes, which are spaced apart along the arrangement direction of the plurality of explosion-proof valves, and each sub-cavity is provided with at least one sub-hole.

9. The battery explosion-proof valve protection structure according to any one of claims 1 to 8, characterized in that, The battery explosion-proof valve protection structure also includes a sealing plate; The sealing plate covers the side of the housing facing the battery and at least seals the first cavity. The sealing plate has an opening at the position corresponding to the first cavity for the explosion-proof valve to pass through. The sealing plate is connected to at least one of the housing and the battery.

10. A battery, characterized in that, Includes the battery explosion-proof valve protection structure as described in any one of claims 1 to 9.

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