A pressure relief device for an energy storage container

Abstract

The present invention discloses a pressure relief device for an energy storage container, belonging to the technical field of pressure relief of energy storage containers. A pressure relief device for an energy storage container includes: a base frame, which is installed on the box body of the container by bolts; a sealing door, which is composed of a plurality of baffles spliced together. There is a buffer space between adjacent two baffles, and a buffer assembly is installed inside the buffer space for relieving the impact force of the sealing door during pressure relief. An elastic sealing unit is installed on the periphery of each buffer space; wherein, when the sealing door is installed on the base frame, the buffer space shrinks under the tightening force, so that the elastic sealing unit deforms under force and is inserted into the sealing groove provided on the base frame to form a labyrinth seal. The present invention forms a sealing door by combining a plurality of baffles, and a buffer assembly and an elastic sealing unit are arranged between adjacent baffles, realizing the dispersion of the impact force during pressure relief and multiple seals.

Description

Technical Field

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

[0002] The pressure relief device is a key design for ensuring the safe operation of the energy storage container 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, resulting in a sharp increase in internal pressure. At this time, quickly releasing the excess pressure through the pressure relief device can prevent the container or battery pack from bursting or even exploding due to overpressure;

[0003] Currently, traditional pressure relief structures often use a single baffle or a simple spring mechanism. Due to insufficient sealing of the single baffle, it is prone to deformation and failure during pressure fluctuations, resulting in rainwater or dust easily entering the interior of the container, affecting the normal operation of the energy storage system. And the simple spring mechanism has limited buffering effect, and the impact force at the moment of pressure relief is prone to cause deformation of the baffle or flying of parts, posing a safety hazard. To solve the above problems, the present invention provides a pressure relief device for an energy storage container. Summary of the Invention

[0004] Aiming at the above existing technical deficiencies, the purpose of the present invention is to provide a pressure relief device for an energy storage container. A sealing door is formed by combining multiple baffles, and a buffer assembly and an elastic sealing unit are arranged between adjacent baffles, realizing the dispersion of the impact force during pressure relief and multiple seals.

[0005] To solve the above technical problems, the present invention adopts the following technical solutions: The present invention provides a pressure relief device for an energy storage container, including:

[0006] A base frame, which is installed on the box body of the container by bolts;

[0007] A sealing door, which is composed of multiple baffles spliced together. There is a buffer space between adjacent two baffles, and a buffer assembly is installed inside the buffer space for relieving the impact force of the sealing door during pressure relief. An elastic sealing unit is installed on the periphery of each buffer space;

[0008] Wherein, when the sealing door is installed on the base frame, the buffer space shrinks under the tightening force, causing the elastic sealing unit to deform under force and be inserted into the sealing groove provided on the base frame to form a labyrinth seal.

[0009] Preferably, the material of the elastic sealing unit is 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 in the shape of "M", and the two open ends thereof are respectively fixedly connected to the two side walls of the buffer space. The cross-sectional shape of the sealing groove is adapted to the shape of the elastic sealing unit.

[0010] Preferably, the buffer assembly includes:

[0011] An elastic part, which is fixedly installed between two adjacent baffles;

[0012] A support rod, which is fixedly installed on the inner side of the outermost baffle, and the support rod penetrates through the remaining multiple baffles and is slidably installed with the remaining multiple baffles. There is an interference fit between the support rod and the multiple baffles that slide with it.

[0013] Preferably, the elastic part includes:

[0014] Two base plates, which are respectively fixedly installed on the opposite side surfaces of two adjacent baffles;

[0015] Four elastic pieces, which are respectively located at the four sides of the base plate and are fixedly connected to the base plate.

[0016] Preferably, a tightening part is installed on the elastic piece. When the elastic piece is subjected to a tightening force and generates a contraction deformation, the tightening part presses against the elastic sealing unit on the corresponding side, increasing the pressing force between the elastic sealing unit and the groove wall of the corresponding sealing groove.

[0017] Preferably, the elastic piece is in a "U" shape, and the two ends of its open end are respectively fixedly connected to the corresponding base plate, and the closed end faces away from the base plate.

[0018] Preferably, the tightening part includes:

[0019] A connecting rod, which is slidably installed in the corresponding buffer space and is fixedly connected to the corresponding elastic piece;

[0020] A top plate, one side of which is fixedly connected to the end of the corresponding connecting rod away from the elastic piece, and the other side is fixedly connected to the end of the middle depression of the corresponding elastic sealing unit.

[0021] Preferably, a plurality of convex rings are fixedly installed on the outer side surface of the support rod.

[0022] Preferably, the sizes of the multiple baffles gradually increase along the direction away from the center of the container, and the base frame is provided with stepped grooves adapted to the multiple baffles.

[0023] Preferably, the outermost baffle is movably clamped through the clamping grooves provided at its four corners with the clamping plates rotatably installed on the base frame, and the clamping plates are driven by corresponding electric push rods. The electric push rods are installed on the base frame, and their output rods are connected to the corresponding clamping plates through a linkage mechanism. The outermost baffle is slidably connected to the fixing rods threadedly installed on the base frame. The end of the fixing rod away from the base frame is turned over to form a limiting frustum.

[0024] The beneficial effects of the present invention are as follows:

[0025] The present invention forms a sealing door by splicing multiple baffles, and in cooperation with the elastic part, the support rod and the elastic sealing unit. During pressure relief, not only can the impact force be absorbed through the elastic part and the support rod, but also multiple seals can be achieved through the labyrinth sealing structure of the elastic sealing unit and the sealing groove. This design can effectively relieve the impact force generated by the pressure on the sealing door when the sealing door is opened for pressure relief, and avoid secondary injuries caused by excessive impact force on the sealing door resulting in parts flying out.

[0026] Through the arrangement of the elastic sheet, the connecting rod and the top plate in the present invention, when the internal pressure of the container increases, when the space between multiple baffles is compressed, the elastic sheet, through the cooperation of the connecting rod and the top plate, pushes the elastic sealing unit to further press against the sealing groove. When the sealing door is opened, the elastic sheet pulls the elastic sealing unit through the connecting rod and the top plate, so that it no longer presses tightly 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

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0028] Figure 1 Structural schematic diagram (first perspective) of a pressure relief device for an energy storage container provided by an embodiment of the present invention.

[0029] Figure 2 Exploded view of the base frame and the baffle of the present invention.

[0030] Figure 3 Structural schematic diagram (second perspective) of a pressure relief device for an energy storage container provided by an embodiment of the present invention.

[0031] Figure 4 Partial cross-sectional view of the present invention.

[0032] Figure 5 For the present invention Figure 4 Exploded view.

[0033] Figure 6 Exploded view of multiple baffles and elastic sealing elements of the present invention.

[0034] Figure 7 For the present invention Figure 6 Enlarged view of part A of the present invention.

[0035] Figure 8 This is a schematic diagram of the connection of the shrapnel, substrate, connecting rod, and top plate of the present invention.

[0036] Figure 9 This is a schematic diagram of the distribution of the horizontal top plate and the vertical top plate of the present invention.

[0037] Explanation of reference numerals:

[0038] 1. Base frame, 2. Baffle, 3. Sealing groove, 4. Elastic sealing unit, 5. Support rod, 6. Substrate, 7. Fixed rod, 8. Shrapnel, 9. Connecting rod, 10. Top plate, 11. Convex ring, 12. Card slot, 13. Card plate, 14. Electric push rod. Detailed implementation manners

[0039] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0040] The present invention provides a pressure relief device for an energy storage container, as Figures 1 to 9 shown.

[0041] Embodiment 1:

[0042] A pressure relief device for an energy storage container includes a base frame 1, the base frame 1 is fixed to the side wall of the container of the container by bolts. There is a stepped groove inside the base frame 1, and the size of the stepped groove gradually increases from the inside to the outside (that is, gradually increases in the direction away from the center of the container). The sealing door is composed of a plurality of baffles 2 spliced together. The sizes of the plurality of baffles 2 increase in sequence in 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 material of the elastic sealing unit 4 is rubber. The cross-sectional shape of the elastic sealing unit 4 is in the shape of "M". The two ends of the open end of the elastic sealing unit 4 are respectively fixedly connected to the corresponding baffle 2. The side of the elastic sealing unit 4 away from the baffle 2 is embedded inside the sealing groove 3 provided on the base frame 1 to form a labyrinth seal.

[0043] During installation, insert the sealing door into the stepped groove on the base frame 1. At this time, the sealing door is subjected to the pressing force of the stepped groove wall. The buffer space between two adjacent baffles 2 will shrink. At this time, the elastic sealing unit 4 will be deformed by force, so that it can be embedded inside the sealing groove 3 and press against the groove wall of the sealing groove 3, thereby better sealing the base frame 1 and preventing rainwater and dust from the outside from entering the inside of the energy storage container and affecting the normal operation of the energy storage system.

[0044] Example Two:

[0045] Based on Example One, in order to prevent the sealing door from being subjected to an instantaneous impact force during pressure relief, which may cause the baffle to deform or parts to fly, a buffer assembly is installed inside the buffer space. During pressure relief, the buffer assembly cooperates with the elastic sealing unit 4 to relieve the impact force on the sealing door.

[0046] 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 of the outermost baffle 2, and the support rod 5 penetrates through the remaining multiple baffles 2 and is slidably installed with the remaining multiple baffles 2. A plurality of convex rings 11 are fixedly connected to the outer side of the support rod 5. The plurality of convex rings 11 are distributed along the axial direction of the support rod 5, and the convex rings 11 are in interference fit with the baffles 2.

[0047] The support rod 5 can support multiple baffles 2, enabling the multiple baffles 2 to stably slide along the axial direction of the support rod 5.

[0048] The elastic part includes two base plates 6. Elastic pieces 8 are fixedly installed on the four sides of the two base plates 6 respectively. The elastic pieces 8 are in a "U" shape, and the two ends of the open end of the elastic piece 8 are respectively fixedly connected to the corresponding base plates 6. The closed end of the elastic piece 8 faces the corresponding elastic sealing unit 4.

[0049] A tightening part is fixedly connected to the closed end of the elastic piece 8. When the elastic piece 8 is contracted and deformed under the tightening force, the tightening part can tighten the corresponding elastic sealing unit 4 on the side. The tightening part is fixedly connected to the depression in the middle of the elastic sealing unit 4. When the tightening part applies a tightening force to the elastic sealing unit 4, it can make the middle depression of the elastic sealing unit 4 better fit 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 greater the contraction deformation amplitude of the elastic piece 8, the greater the tightening force generated by the tightening part on the elastic sealing unit 4. When opening the sealing door, since the outermost baffle 2 is not restricted, the distance between two adjacent baffles 2 will increase. At this time, the elastic piece 8 rebounds under its own elastic force and pulls the elastic sealing unit 4 through the tightening part, so that it no longer presses tightly against the groove wall of the sealing groove 3. As described above, the elastic piece 8 and the tightening part can achieve a dynamic sealing effect, which can not only ensure the sealing performance, but also reduce the opening resistance during pressure relief and better open the sealing door.

[0050] The tightening part includes a connecting rod 9. The connecting rod 9 is slidably installed inside the corresponding buffer space, and one end of the connecting rod 9 is fixedly connected to the corresponding elastic piece 8, and the other end is fixedly installed with a top plate 10. 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 asFigure 9 As shown, the joints of the horizontal top plates 10 and the vertical top plates 10 in different buffer spaces are staggered, which can ensure the sealing performance between the sealing door and the base frame 1.

[0051] During pressure relief, the pressure reduces the distance between two adjacent baffles 2. The baffle 2 will slide on the support rod 5. At this time, the convex ring 11 on the support rod 5 can play an initial buffering effect. At the same time, due to the reduction of the distance between adjacent baffles 2, the elastic sheet 8 and the elastic sealing unit 4 will both contract under the tightening force (the elastic force of the elastic sheet 8 and the elastic sealing unit 4 will play a secondary buffering effect at this time). When the elastic sheet 8 contracts, it will apply a tightening force to the elastic sealing unit 4 through the connecting rod 9 and the top plate 10. This tightening force will counteract the elastic sealing unit 4, so as to better consume the impact force received during pressure relief, thus achieving a three - time buffering effect.

[0052] Through the above triple buffering, the impact force on the sealing door can be effectively reduced, avoiding parts flying out due to excessive impact force and causing secondary injuries.

[0053] Embodiment Three:

[0054] On the basis of Embodiment Two, in order to stably install the sealing door, card slots 12 are opened at the four corners of the outermost baffle 2. The card slots 12 are movably clamped with the clamping plates 13 rotatably installed on the base frame 1. By rotating the clamping plates 13, it can be controlled whether the clamping plates 13 are clamped with the card slots 12, so as to control whether the sealing door seals the base frame 1.

[0055] 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 clamping plates 13 through a linkage mechanism. When the output rods of the electric push rods 14 retract, they can drive the clamping plates 13 to rotate, so that the clamping plates 13 are disengaged from the card slots 12. At this time, the sealing door can be removed from the base frame 1.

[0056] 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 holes provided on the outermost baffle 2 and is folded outwards to form a limiting frustum. During pressure relief, the limiting frustum can block the sealing door to prevent it from falling off. When the limiting frustum blocks the sealing door, the buffer assembly can relieve the impact force received by the limiting frustum, avoiding excessive impact force on the fixing rod 7, resulting in damage and flying out with the sealing door, causing potential safety hazards.

[0057] 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 equivalent technologies, the present invention is also intended to include these changes and modifications.

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; The buffer assembly comprises: An elastic portion, the elastic portion being fixedly mounted between two adjacent baffles (2); 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) being respectively located at four sides of the base plate (6) and fixedly connected to the base plate (6); 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; 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.

2. A pressure relief device for an energy storage container as claimed in 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 also includes: 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) penetrates through the remaining plurality of baffle plates (2) and is slidably mounted with 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 with the support rod (5).

4. A pressure relief device for an energy storage container according to claim 1, 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).

5. 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).

6. 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).

7. 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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