Pressure relief device of energy storage container

Abstract

The invention discloses a pressure relief device of an energy storage container, and belongs to the technical field of pressure relief of energy storage containers, and the pressure relief device of the energy storage container comprises a base frame which is installed on a container body of the container through bolts; the sealing door is formed by splicing a plurality of baffles, a buffer space is formed between every two adjacent baffles, a buffer assembly is installed in each buffer space and used for relieving impact force of the sealing door during pressure relief, and an elastic sealing unit is installed on the periphery of each buffer space; when the sealing door is installed on the base frame, the buffer space is contracted under the action of abutting force, so that the elastic sealing unit is deformed under the action of force, and the elastic sealing unit and a sealing groove formed in the base frame are mutually connected in an inserted mode to form a labyrinth seal, the multiple baffles are combined to form the sealing door, and the buffer assembly and the elastic sealing unit are arranged between the adjacent baffles; impact force dispersion and multiple sealing during pressure relief are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of pressure relief of energy storage containers, and in particular to a pressure relief device of an energy storage container. Background Art

[0002] The pressure relief device is a key design for energy storage containers to ensure safe operation of the system. During the charging and discharging process of the energy storage system, the battery may generate a large amount of gas or heat due to abnormal conditions such as thermal runaway, chemical reaction or short circuit, causing the internal pressure to rise sharply. At this time, the pressure relief device can quickly release the excess pressure to prevent the container or battery pack from rupturing or even exploding due to overpressure; At present, traditional pressure relief structures often use a single baffle or a simple spring mechanism. A single baffle is not sufficiently sealed and is easily deformed and failed when the pressure fluctuates, causing rainwater or dust to easily enter the interior of the container, affecting the normal operation of the energy storage system. The simple spring mechanism has a limited buffering effect, and the impact force at the moment of pressure relief is likely to cause the baffle to deform or parts to splash, posing a safety hazard. In order to solve the above problems, the present invention provides a pressure relief device for an energy storage container. Summary of the invention

[0003] In view of the above-mentioned technical deficiencies, the purpose of the present invention is to provide a pressure relief device for an energy storage container, in which a sealing door is formed by combining multiple baffles, and a buffer assembly and an elastic sealing unit are arranged between adjacent baffles, so as to achieve impact force dispersion and multiple seals during pressure relief.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solution: The present invention provides a pressure relief device for an energy storage container, a pressure relief device for an energy storage container, comprising: A base frame, wherein the base frame is mounted on the container body by bolts; The sealing door is composed of a plurality of baffles, a buffer space is provided between two adjacent baffles, a buffer assembly is installed inside the buffer space to relieve the impact force of the sealing door during pressure relief, and an elastic sealing unit is installed around the periphery of each buffer space; When the sealing door is installed on the base frame, the buffer space is contracted by the pressing force, so that the elastic sealing unit is deformed by the force and is plugged into the sealing groove provided on the base frame to form a labyrinth seal.

[0005] Preferably, the elastic sealing unit is made of rubber, and the overall shape of the elastic sealing unit is adapted to the shape of the baffle. The shape of the elastic sealing unit is "M"-shaped, and the two ends of its opening are respectively fixedly connected to the two side walls of the buffer space, and the shape of the cross-section of the sealing groove is adapted to the shape of the elastic sealing unit.

[0006] Preferably, the buffer assembly comprises: An elastic part, wherein the elastic part is fixedly installed between two adjacent baffles; The support rod is fixedly mounted on the inner side of the baffle plate located at the outermost layer, and the support rod passes through the remaining multiple baffle plates and is slidably mounted on the remaining multiple baffle plates. There is an interference fit between the support rod and the multiple baffle plates that slide relative to it.

[0007] Preferably, the elastic portion comprises: Two substrates, the two substrates are respectively fixedly mounted on the side surfaces of two adjacent baffles facing each other; Four spring sheets are respectively located at four sides of the base plate and are fixedly connected to the base plate.

[0008] Preferably, a pressing part is installed on the spring sheet, and when the spring sheet is subjected to the pressing force and produces a contraction deformation, the pressing part presses against the elastic sealing unit on the corresponding side, thereby increasing the pressing force between the elastic sealing unit and the corresponding sealing groove wall.

[0009] Preferably, the spring piece is in a "U" shape, with both ends of its open end fixedly connected to the corresponding substrate respectively, and the closed end facing away from the substrate.

[0010] Preferably, the abutting portion comprises: A connecting rod, wherein the connecting rod is slidably mounted in the corresponding buffer space and is fixedly connected to the corresponding spring sheet; A top plate, one side of which is fixedly connected to an end of the corresponding connecting rod away from the elastic sheet, and the other side of which is fixedly connected to the end of the corresponding elastic sealing unit at the middle recess.

[0011] Preferably, a plurality of convex rings are fixedly mounted on the outer side surface of the support rod.

[0012] Preferably, the sizes of the plurality of baffles are sequentially increased in a direction away from the center of the container, and the base frame is provided with stepped grooves adapted to the plurality of baffles.

[0013] Preferably, the baffle plate located on the outermost layer is movably connected with the card plate rotatably installed on the base frame through the card slots provided at its four corners, and the card plate is driven by the corresponding electric push rod, which is installed on the base frame, and its output rod is connected to the corresponding card plate through a connecting rod mechanism. The outermost baffle plate is slidably connected to the fixed rod threadedly installed on the base frame, and the fixed rod is folded in all directions at one end away from the base frame to form a limiting cone.

[0014] The beneficial effects of the present invention are: The present invention forms a sealing door by splicing multiple baffles, which cooperate with an elastic part, a support rod and an elastic sealing unit. When the pressure is released, the elastic part and the support rod can absorb the impact force, and the labyrinth sealing structure of the elastic sealing unit and the sealing groove can realize multiple seals. This design can effectively alleviate the impact force of the sealing door caused by the pressure when the sealing door is opened to release the pressure, and avoid the sealing door being subjected to excessive impact force, which may cause parts to fly out and cause secondary damage.

[0015] The present invention arranges spring pieces, connecting rods and top plates. When the internal pressure of the container increases, the space between the multiple baffles is compressed. The spring pieces push the elastic sealing unit to further press the sealing groove through the cooperation of the connecting rods and the top plates. When the sealing door is opened, the spring pieces pull the elastic sealing unit through the connecting rods and the top plates so that the elastic sealing unit no longer presses against the sealing groove, thereby forming a dynamic sealing effect, which can not only ensure the sealing performance but also enable the sealing door to be opened better. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 A schematic structural diagram of a pressure relief device for an energy storage container provided in an embodiment of the present invention (first perspective).

[0018] Figure 2 It is an exploded view of the base frame and baffle of the present invention.

[0019] Figure 3 A schematic structural diagram of a pressure relief device for an energy storage container provided in an embodiment of the present invention (second viewing angle).

[0020] Figure 4 It is a partial cross-sectional view of the present invention.

[0021] Figure 5 For the present invention Figure 4 Exploded diagram.

[0022] Figure 6 It is an exploded view of multiple baffles and elastic sealing elements of the present invention.

[0023] Figure 7 For the present invention Figure 6 Enlarged view of point A.

[0024] Figure 8 The figure is a schematic diagram of the connection between the spring piece, the base plate, the connecting rod and the top plate of the present invention.

[0025] Fig. 9 It is a distribution diagram of the horizontal top plate and the vertical top plate of the present invention.

[0026] Description of reference numerals: 1. Base frame, 2. Baffle, 3. Sealing groove, 4. Elastic sealing unit, 5. Support rod, 6. Base plate, 7. Fixing rod, 8. Shrapnel, 9. Connecting rod, 10. Top plate, 11. Convex ring, 12. Card slot, 13. Card plate, 14. Electric push rod. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] The present invention provides a pressure relief device for an energy storage container, such as Figures 1 to 9 shown.

[0029] Embodiment 1: A pressure relief device for an energy storage container comprises a base frame 1, which is fixed to the side wall of the container body by bolts. A stepped groove is arranged inside the base frame 1, and the size of the stepped groove increases step by step from the inside to the outside (i.e., it increases step by step as it moves away from the center of the container). A sealing door is composed of a plurality of baffles 2, and the sizes of the plurality of baffles 2 increase successively along the direction away from the center of the container, and are adapted to the stepped groove on the base frame 1. A buffer space is reserved between adjacent baffles 2, and an elastic sealing unit 4 is installed around the buffer space. The elastic sealing unit 4 is made of rubber, and the cross-section of the elastic sealing unit 4 is in an "M" shape. Both ends of the opening end of the elastic sealing unit 4 are respectively fixedly connected to the corresponding baffles 2, and the side of the elastic sealing unit 4 away from the baffle 2 is embedded in the interior of a sealing groove 3 arranged on the base frame 1 to form a labyrinth seal.

[0030] During installation, the sealing door is inserted into the stepped groove on the base frame 1. At this time, the sealing door is pressed by the stepped groove wall, and the buffer space between the two adjacent baffles 2 will shrink. At this time, the elastic sealing unit 4 will be deformed by the force, so that it can be embedded in the sealing groove 3 and pressed against the groove wall of the sealing groove 3, thereby better sealing the base frame 1 and preventing external rainwater and dust from entering the interior of the energy storage container and affecting the normal operation of the energy storage system.

[0031] Embodiment 2: On the basis of Example 1, in order to prevent the sealing door from being subjected to instantaneous impact force during pressure relief, which may cause deformation of the baffle or splashing of parts, a buffer assembly is installed inside the buffer space. During pressure relief, the buffer assembly cooperates with the elastic sealing unit 4 to alleviate the impact force on the sealing door.

[0032] The buffer assembly includes: an elastic part and a support rod 5, the elastic part is fixedly installed between two adjacent baffles 2, the support rod 5 is fixedly installed on the inner side surface of the baffle 2 located at the outermost layer, and the support rod 5 passes through the remaining multiple baffles 2 and is slidably installed with the remaining multiple baffles 2, and a plurality of convex rings 11 are fixedly connected to the outer side surface of the support rod 5, and the plurality of convex rings 11 are distributed along the axial direction of the support rod 5, and the convex rings 11 are interference fit with the baffle 2.

[0033] The support rod 5 can support a plurality of baffles 2 , so that the plurality of baffles 2 can stably slide along the axial direction of the support rod 5 .

[0034] The elastic part includes two substrates 6, and springs 8 are fixedly installed on the four sides of the two substrates 6. The shape of the spring 8 is "U"-shaped. The two ends of the open end of the spring 8 are fixedly connected to the corresponding substrates 6, and the closed end of the spring 8 faces the corresponding elastic sealing unit 4.

[0035] The closed end of the spring sheet 8 is fixedly connected with a pressing part. When the spring sheet 8 is contracted and deformed by the pressing force, the pressing part can press against the elastic sealing unit 4 on the corresponding side. The pressing part is fixedly connected to the depression in the middle of the elastic sealing unit 4. When the pressing part applies a pressing force to the elastic sealing unit 4, the depression in the middle of the elastic sealing unit 4 can be better fitted to the corresponding sealing groove 3, thereby improving the sealing performance between the elastic sealing unit 4 and the corresponding sealing groove 3. Moreover, as the internal pressure of the container increases, the amplitude of the contraction and deformation of the spring sheet 8 becomes larger, and the pressing force generated by the pressing part on the elastic sealing unit 4 becomes larger. When the sealed door is opened, since the outermost baffle 2 is not constrained, the distance between the two adjacent baffles 2 will increase. At this time, the spring sheet 8 rebounds under the action of its own elastic force, and pulls the elastic sealing unit 4 through the pressing part so that it no longer presses against the groove wall of the sealing groove 3. As can be seen from the above, the spring sheet 8 and the pressing part can achieve a dynamic sealing effect, which can not only ensure the sealing performance, but also reduce the resistance to opening the door when the pressure is released, so as to better open the sealed door.

[0036] The abutting part includes a connecting rod 9, which is slidably mounted inside the corresponding buffer space, and one end of the connecting rod 9 is fixedly connected to the corresponding spring sheet 8, and the other end is fixedly mounted with a top plate 10, and the side of the top plate 10 away from the connecting rod 9 is fixedly connected to the corresponding elastic sealing unit 4. The distribution state of the multiple top plates 10 in the multiple buffer spaces is as shown in FIG. Fig. 9As shown, the joints of the horizontal top plates 10 and the vertical top plates 10 in different buffer spaces are staggered to ensure the sealing between the sealed door and the base frame 1.

[0037] During pressure relief, the pressure reduces the distance between two adjacent baffles 2, and the baffle 2 will slide on the support rod 5. At this time, the convex ring 11 on the support rod 5 can play the role of primary buffering. At the same time, due to the reduction in the distance between adjacent baffles 2, the spring piece 8 and the elastic sealing unit 4 will be contracted by the pressing force (the elastic force of the spring piece 8 and the elastic sealing unit 4 themselves will play the role of secondary buffering at this time). When contracting, the spring piece 8 will apply a pressing force to the elastic sealing unit 4 through the connecting rod 9 and the top plate 10. This pressing force will counteract the elastic sealing unit 4, so as to better consume the impact force during pressure relief, thereby playing the role of tertiary buffering.

[0038] The triple buffer mentioned above can effectively reduce the impact force on the sealed door, preventing parts from flying out and causing secondary damage due to excessive impact force.

[0039] Embodiment three: On the basis of the second embodiment, in order to stably install the sealing door, card slots 12 are opened at the four corners of the baffle plate 2 located on the outermost layer. The card slots 12 are movably engaged with a card plate 13 rotatably installed on the base frame 1. By rotating the card plate 13, it can be controlled whether the card plate 13 is engaged with the card slot 12, thereby controlling whether the sealing door seals the base frame 1.

[0040] Electric push rods 14 are installed at the four corners of the base frame 1. The output rods of the electric push rods 14 are connected to the corresponding card plates 13 through a connecting rod mechanism. The retraction of the output rods of the electric push rods 14 can drive the card plates 13 to rotate, so that the card plates 13 are disengaged from the card slots 12. At this time, the sealed door can be removed from the base frame 1.

[0041] In order to prevent the sealing door from flying out during pressure relief, a plurality of fixing rods 7 are threadedly connected to the base frame 1. The end of the fixing rod 7 away from the base frame 1 extends to the outside of the baffle 2 through the through hole provided on the outermost baffle 2 and is folded on all sides to form a limiting cone. During pressure relief, the limiting cone can block the sealing door to prevent it from falling off. When the limiting cone blocks the sealing door, the buffer assembly can alleviate the impact force on the limiting cone to prevent the fixing rod 7 from being subjected to excessive impact force, resulting in damage and flying out together with the sealing door, causing safety hazards.

[0042] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A pressure relief device for an energy storage container, characterized in that: include: A base frame (1), wherein the base frame (1) is mounted on a container body by means of bolts; A sealed door, the sealed door being composed of a plurality of baffles (2) spliced ​​together, a buffer space being provided between two adjacent baffles (2), a buffer assembly being installed inside the buffer space for alleviating the impact force of the sealed door during pressure relief, and an elastic sealing unit (4) being installed around the periphery of each buffer space; When the sealing door is installed on the base frame (1), the buffer space is contracted by the pressing force, causing the elastic sealing unit (4) to deform under the force and to be plugged into the sealing groove (3) provided on the base frame (1) to form a labyrinth seal.

2. A pressure relief device for an energy storage container according to claim 1, characterized in that: The elastic sealing unit (4) is made of rubber, and the overall shape of the elastic sealing unit (4) matches the shape of the baffle (2). The shape of the elastic sealing unit (4) is "M"-shaped, and the two ends of its opening are respectively fixedly connected to the two side walls of the buffer space, and the shape of the cross section of the sealing groove (3) matches the shape of the elastic sealing unit (4).

3. A pressure relief device for an energy storage container as claimed in claim 2, characterized in that: The buffer assembly comprises: An elastic portion, the elastic portion being fixedly mounted between two adjacent baffles (2); A support rod (5), wherein the support rod (5) is fixedly mounted on the inner side surface of the baffle plate (2) located at the outermost layer, and the support rod (5) passes through the remaining plurality of baffle plates (2) and is slidably mounted on the remaining plurality of baffle plates (2), and an interference fit is formed between the support rod (5) and the plurality of baffle plates (2) that slide relative to the support rod (5).

4. A pressure relief device for an energy storage container as claimed in claim 3, characterized in that: The elastic portion comprises: Two substrates (6), the two substrates (6) being respectively fixedly mounted on opposite side surfaces of two adjacent baffles (2); Four spring sheets (8), the four spring sheets (8) are respectively located on four sides of the base plate (6) and are fixedly connected to the base plate (6).

5. A pressure relief device for an energy storage container as claimed in claim 4, characterized in that: The spring sheet (8) is provided with a pressing portion, and when the spring sheet (8) is subjected to a pressing force and undergoes contraction deformation, the pressing portion presses against the elastic sealing unit (4) at the corresponding side, thereby increasing the pressing force between the elastic sealing unit (4) and the corresponding sealing groove (3) wall.

6. A pressure relief device for an energy storage container as claimed in claim 5, characterized in that: The spring sheet (8) is in a "U" shape, with both ends of its open end being fixedly connected to the corresponding substrate (6) respectively, and the closed end facing in a direction away from the substrate (6).

7. A pressure relief device for an energy storage container as claimed in claim 5, characterized in that: The abutting portion comprises: A connecting rod (9), wherein the connecting rod (9) is slidably mounted in the corresponding buffer space, and the connecting rod (9) is fixedly connected to the corresponding spring sheet (8); A top plate (10), wherein one side of the top plate (10) is fixedly connected to an end of the corresponding connecting rod (9) away from the elastic sheet (8), and the other side of the top plate (10) is fixedly connected to an end portion of a corresponding elastic sealing unit (4) at a recessed position in the middle.

8. The pressure relief device for an energy storage container according to claim 3, characterized in that: A plurality of convex rings (11) are fixedly mounted on the outer surface of the support rod (5).

9. The pressure relief device for an energy storage container according to claim 1, characterized in that: The sizes of the plurality of baffles (2) are successively increased in a direction away from the center of the container, and the base frame (1) is provided with stepped grooves adapted to the plurality of baffles (2).

10. The pressure relief device for an energy storage container according to claim 1, characterized in that: The baffle plate (2) at the outermost layer is movably connected to a clamping plate (13) rotatably mounted on the base frame (1) through clamping grooves (12) provided at its four corners, and the clamping plate (13) is driven by a corresponding electric push rod (14). The electric push rod (14) is mounted on the base frame (1), and its output rod is connected to the corresponding clamping plate (13) through a connecting rod mechanism. The baffle plate (2) at the outermost layer is slidably connected to a fixing rod (7) threadedly mounted on the base frame (1), and one end of the fixing rod (7) away from the base frame (1) is folded toward the periphery to form a limiting truncated cone.

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