Internal support type energy storage battery box

Abstract

The invention belongs to the technical field of energy storage equipment, and discloses an internal supporting type energy storage battery box which comprises a box body, positioning pieces arranged at the upper end and the lower end of the box body, a reinforcing beam arranged in the box body and supporting pieces longitudinally distributed in the box body. The tail end of the supporting piece penetrates through the bottom wall of the box body and extends to the outside, and the hard air tap can be used for being connected with air supply equipment and can also be used for being in butt joint with the tail end of the supporting piece in the battery box above. According to the internal supporting type energy storage battery box, the supporting pieces are matched with the hard air taps of the supporting pieces and the structural design of the thickened parts at the bottom ends of the supporting pieces, so that the two vertical adjacent box bodies can be more stably butted while the box body structures are reinforced, and due to the hollow structural design of the interiors of the supporting pieces, the air taps on the uppermost energy storage box are communicated with air supply equipment, so that the air supply equipment is more stable. Air flow can circulate in the vertically stacked energy storage boxes, and then the cooling effect is achieved.

Description

Technical Field

[0001] This invention relates to the field of energy storage equipment technology, specifically to an internally supported energy storage battery box. Background Technology

[0002] Energy storage boxes are essentially box-type devices used for power supply, relying on their internal battery cells for power generation. They are mostly stacked vertically to ensure power supply. For example, a fire-fighting directional exhaust device for an energy storage battery box (publication number CN218632340U) is described. This device features a protective plate on the energy storage system cabinet, an exhaust port on the protective plate, and several pipe adapters on the exhaust port. A top cover is installed on the battery box, and an exhaust port is also located on the battery box. An adapter is installed inside the exhaust port, and the adapter is sealed to an exhaust pipe via the front end of the exhaust pipe. A water-proof and breathable membrane is installed between the adapter and the front end of the exhaust pipe. The exhaust pipe is also sealed to the pipe adapter via the rear end of the exhaust pipe. This application can directly exhaust flammable gases generated when a single energy storage battery box fails, reducing the concentration of flammable gases inside the box.

[0003] For example, CN118693448B discloses an energy storage device and electrical equipment, relating to the field of energy storage technology. This energy storage device includes: a battery housing, the housing cover of which includes a pair of side plates distributed along the width direction of the battery housing; a battery module located within the battery compartment of the battery housing, the distance between the first surface of a battery cell and the side plates increasing in the direction towards the bottom of the lower housing; and a first guide surface provided on the edge of an isolation plate included in the first sub-battery module, at least a portion of which is located between a fixed end plate and the side plates in the width direction of the battery housing. In this embodiment, the side plates of the housing cover are inclined outwards to give the housing cover a larger opening size in the width direction of the battery housing, and the isolation plate of the first sub-battery module has a first guide surface. Therefore, based on the larger opening size of the housing cover and the guiding cooperation between the first guide surface and the side plates, the housing cover and the lower housing can be aligned and assembled, improving assembly efficiency.

[0004] The aforementioned existing technologies have made beneficial improvements in terms of fire prevention, smoke prevention, and interlocking, effectively improving the efficiency and safety performance of battery energy storage boxes. However, some shortcomings still exist. When energy storage boxes are used in combination, an additional internal support structure is added, which makes the internal space more compact. In this case, the additional use of cooling / smoke exhaust mechanisms will further reduce the internal space, making assembly more difficult and production costs relatively higher. The resulting effect does not match the cost. Summary of the Invention

[0005] The purpose of this invention is to provide an internally supported energy storage battery box to solve the problem mentioned in the background art that existing energy storage boxes require an additional internal support structure when used in combination, which leads to a more compact internal space. In this case, the additional use of a cooling / exhaust mechanism will further reduce the internal space, making assembly more difficult and production costs relatively higher, while the resulting effect does not match the cost.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an internally supported energy storage battery box, comprising a box body and positioning components disposed at the upper and lower ends of the box body, and a reinforcing beam disposed inside the box body, and further comprising a support component disposed longitudinally distributed in the box body, wherein the top end of the hollow structure inside the support component is connected to a rigid air nozzle, and the tail end of the support component extends through the bottom wall of the box body to the outside, and the rigid air nozzle can be used to connect to an air supply device or to connect to the tail end of the support component inside the upper battery box.

[0007] Preferably, the support member is also connected to a laterally distributed reinforcing member on its side, and the tail end of the reinforcing member is installed on the side wall of the box.

[0008] Preferably, the reinforcing member is also hollow and allows fluid to pass through, with its left end connected to the interior of the support member, while the right end of the support member is connected to the outside in a controllable manner through a pressure relief connector.

[0009] Preferably, the rear end of the support member is also provided with a switch mechanism for controlling the opening and closing of the channel, and the pressure relief connector is also provided with a switch mechanism.

[0010] Preferably, the switching mechanism includes a through hole and a plug for sealing or opening the through hole. The plug is connected to a bracket by an elastic element, and the plug is also connected to the bracket by a connecting strip of a thermally fused mechanism. The connecting strip is used to limit the initial position of the plug and keep the elastic element in a compressed state.

[0011] Preferably, the brackets in the two switching mechanisms are respectively installed at the tail end of the support and inside the pressure relief connector. After the connecting strip in the support melts, the plug moves and seals the through hole in the support. After the connecting strip in the pressure relief connector melts, the plug moves and opens the through hole in the pressure relief connector.

[0012] Preferably, the surface of the reinforcing member is provided with pores, which are normally blocked by protrusions with arc-shaped edges, and the protrusions are attached and fixed in the metal sheet.

[0013] Preferably, the two ends of the metal sheet are slidably embedded in the reinforcing member via slip rings, wherein the metal sheet is made of shape memory alloy material.

[0014] Preferably, the slip ring located on the left side is connected to the plug in the support member via a connecting thread.

[0015] Compared with the prior art, the beneficial effects of the present invention are: the internally supported energy storage battery box integrates an internal support structure in the energy storage box, and simultaneously has the effects of airflow cooling and auxiliary smoke exhaust, resulting in better overall performance and more reasonable use of the internal space of the energy storage box, as shown in the following details.

[0016] 1. The structural design of the support component, along with its rigid air nozzle and the thickened bottom part, enables the rigid air nozzle to be spliced ​​with the tail end of the support component in the upper energy storage box. This strengthens the box structure and allows for a more stable connection between two vertically adjacent boxes. The hollow internal structure of the support component allows airflow to circulate in all vertically stacked energy storage boxes after the air nozzle on the uppermost energy storage box is connected to the air supply equipment, thereby achieving a cooling effect. Furthermore, the structural design of the reinforcing components can further enhance the overall structural strength of the enclosure. Combined with the elliptical cross-section design of the other supporting components, compared with the complex support mechanisms of traditional technologies, it can reduce space occupation while achieving ventilation. Moreover, in conjunction with the pressure relief joints connected to it and the switching mechanism at the bottom of the supporting components, it can achieve the connection between vertical channels under normal conditions, as well as cut off the airflow path between the abnormal high temperature energy storage box and the normal energy storage box under abnormal conditions, and achieve the effect of pressure relief and smoke exhaust.

[0017] 2. The design of pores on the surface of the reinforcing component and the internal metal sheet with raised structure can achieve temporary opening of the pores under high temperature conditions and forced opening of the pores under abnormal high temperature conditions, which makes it more applicable and has a better performance. Attached Figure Description

[0018] Figure 1 This is a top view of the box structure of the present invention; Figure 2 This is a schematic diagram of the box structure from below in this invention; Figure 3 This is a schematic diagram of the internal structure of the housing of the present invention; Figure 4 This is a schematic diagram of the assembled box structure of the present invention; Figure 5 This is a schematic diagram of the support structure in the docking state of the present invention; Figure 6 This is an exploded structural diagram of the support and reinforcing components of the present invention; Figure 7 This is a schematic diagram of the internal structure of the support member according to Embodiment 1 of the present invention; Figure 8 This is a schematic diagram of the internal structure of the pressure relief connector according to Embodiment 1 of the present invention; Figure 9 This is a schematic diagram of the internal structure of the reinforcing member in Embodiment 2 of the present invention; Figure 10 This is a cross-sectional structural diagram of the reinforcing member and the supporting member in Embodiment 2 of the present invention.

[0019] In the diagram: 1. Housing; 2. Positioning component; 3. Support component; 4. Rigid air nozzle; 5. Reinforcing component; 6. Pressure relief connector; 7. Reinforcing beam; 8. Plug; 9. Through hole; 10. Elastic component; 11. Connecting strip; 12. Air hole; 13. Protrusion; 14. Metal sheet; 15. Slip ring; 16. Connecting thread; 17. Guide ring. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Please see Figure 1 - Figure 10 The present invention provides the following technical solution: Example 1: The solution disclosed in this example is designed to address the problems existing in the prior art, such as... Figure 1 - Figure 3As shown, the assembly includes a housing 1, positioning components 2 located at the upper and lower ends of the housing 1, a reinforcing beam 7 located inside the housing 1, and a support component 3 longitudinally distributed within the housing 1. The top of the hollow structure within the support component 3 is connected to a rigid air nozzle 4, while the tail end of the support component 3 extends through the bottom wall of the housing 1 to the outside. The rigid air nozzle 4 can be used to connect to a gas supply device or to connect to the tail end of the support component 3 inside the upper battery box. The actual assembly process is as follows: first, the bottom end of the rigid support component 3 is passed through the pre-drilled hole at the bottom of the housing 1. After sealing and assembly, the housing cover with the rigid air nozzle 4 is installed into the housing 1, and the tail end of the rigid air nozzle 4 is fitted to the top end of the support component 3. Thus, the assembled support component 3 is used to raise the longitudinal reinforcement as a whole. The structural strength of the energy storage box is enhanced. Furthermore, because the rigid air nozzle 4 fits snugly with the tail ends of the support components 3 in the other energy storage boxes, when the boxes 1 are stacked, it serves as a plug-in structure to further increase the stacking stability of the energy storage boxes. Additionally, an air supply device can be connected to the rigid air nozzle 4 in the topmost box 1, allowing airflow not only in the support components 3 of that box 1 but also in the support components 3 inside the other stacked boxes 1, resulting in better coordinated cooling. Compared to adding a fan independently to each battery box to improve cooling efficiency, this solution is more suitable for this type of stacked energy storage box assembly. Combined with the longitudinal internal support reinforcement effect of the box 1, it is more energy-efficient and environmentally friendly.

[0022] Because battery boxes are stacked vertically, it's crucial to consider not only the interconnectivity of cooling functions but also their protection performance under extreme conditions. In traditional stacked energy storage battery boxes, if one box experiences abnormally high temperatures or even generates hot smoke, the abnormal smoke and high temperatures can easily spread to other battery boxes via existing series-connected cooling mechanisms. Therefore, if... Figure 5 - Figure 8In the illustrated scheme, the support member 3 is also connected to a laterally distributed reinforcing member 5 on its side. The tail end of the reinforcing member 5 is installed on the side wall of the housing 1. The interior of the reinforcing member 5 is also hollow and allows fluid to pass through. Its left end is connected to the interior of the support member 3, while the right end of the support member 3 is connected to the outside in a controllable manner through a pressure relief connector 6. The tail end of the support member 3 is also provided with a switch mechanism for controlling the opening and closing of the channel. A switch mechanism is also provided in the pressure relief connector 6. The switch mechanism in the pressure relief connector 6 is located within the coverage area of ​​the housing 1. The switch mechanism includes a through hole 9 and a mechanism for sealing or... The plug 8 in the through hole 9 is opened. The plug 8 is connected to a bracket through the elastic element 10. The plug 8 is also connected to the bracket through the connecting strip 11 of the thermal fusion mechanism. The connecting strip 11 is used to limit the initial position of the plug 8 and keep the elastic element 10 in a compressed state. The brackets in the two switching mechanisms are respectively installed at the tail end of the support 3 and inside the pressure relief connector 6. After the connecting strip 11 in the support 3 melts, the plug 8 moves and seals the through hole 9 in the support 3. After the connecting strip 11 in the pressure relief connector 6 melts, the plug 8 moves and opens the through hole 9 in the pressure relief connector 6.

[0023] Under normal conditions, the switch mechanism at the bottom of the support 3 remains open to allow airflow, while the switch mechanism inside the pressure relief connector 6 remains closed to prevent airflow from flowing directly out of the battery box above. When an abnormally high temperature occurs inside a battery box, the two connecting strips 11 melt and break. As a result, the plug 8 in the support 3 will move downward elastically and block the through hole 9 below it. Similarly, the connecting strip 11 in the pressure relief connector 6 melts and moves, breaking free from the blockage of the through hole 9. At this time, the airflow in the box 1 above that is not abnormal will simultaneously enter the abnormal support 3. The high-temperature airflow will not continue to flow downward to other battery boxes, but will flow out from the pressure relief connector 6 for the exhaust of high-temperature flue gas.

[0024] Example 2: In the scheme disclosed in this example, the energy storage box differs from the battery box of a new energy vehicle. Under high-temperature conditions, it allows indirect communication between the internal space where the battery is located and the outside. Therefore, this example mainly aims to solve two problems. The first problem is that under normal high-temperature conditions, the cooling efficiency of the fully enclosed heat exchange components is relatively low. The second problem is to ensure that most of the flue gas can be discharged smoothly and directionally under extreme conditions, avoiding further deflagration inside or delaying the occurrence of large-scale combustion as much as possible. Figure 9 - Figure 10 As shown, the surface of the reinforcing member 5 is provided with vents 12. In the normal state, the vents 12 are blocked by the arc-shaped protrusions 13, which are fixed in the metal sheet 14. The two ends of the metal sheet 14 are slidably embedded in the reinforcing member 5 through the slip rings 15. The metal sheet 14 is made of shape memory alloy material. The slip ring 15 on the left side is connected to the plug 8 in the support member 3 through the connecting wire 16. Regarding the first question, the solution is to create vents 12 on the surface of the reinforcing member 5. At room temperature, the temperature is insufficient to deform the metal sheet 14, meaning there is no immediate need for high-intensity cooling inside the housing 1. Therefore, the vents 12 remain closed. At high temperature (referring to the normal high temperature generated during operation inside the battery box), the metal sheet 14 will bend and deform inward. The triggering temperature of the switching mechanism is higher than the deformation triggering temperature of the metal sheet 14, so the switching mechanism will remain in an untriggered state. This allows the airflow channel to connect with the inside of the housing 1 through the vents 12. Alternatively, the reinforcing member 5 can be designed as a completely horizontal distribution or a downward-sloping distribution on the left / right end. This allows the interior of the reinforcing member 5 to be under positive pressure, slightly negative pressure, or negative pressure when the airflow flows from top to bottom through the support member 3. The three assembly schemes corresponding to these three states need to be determined during the assembly stage of the battery box, and different schemes should be selected based on the different needs of downstream customers. Regarding the second issue, under abnormally high temperatures, the connecting strip 11 melts rapidly. Under the rebound of the elastic element 10, the plug 8 moves quickly, causing the connecting wire 16 to slide within the guide ring 17 on the inner wall of the reinforcing member 5 on one side. This, in turn, causes the slip ring 15 and the metal plate 14 to move rapidly, opening the vent 12. Therefore, the high-temperature airflow or smoke inside can be quickly carried out by the airflow, thus slowing down the combustion rate. In the event of high-temperature dense smoke, the switch mechanism at the bottom of the corresponding housing 1 will close, while the switch mechanism on the side of the same housing 1 will open. The airflow that was originally flowing downwards will then redirect... The airflow flows through the reinforcing member 5 inside the high-temperature housing 1. Due to the abnormally high temperature, the through holes 9 in the reinforcing member 5 will also open simultaneously. Therefore, the pressure difference caused by the large difference in airflow velocity between the inside and outside of the reinforcing member 5 will guide the hot smoke outside the reinforcing member 5, i.e., inside the housing 1, into the reinforcing member 5 and out from the open area at the end of the reinforcing member 5. It should be noted that during the abnormally high temperature rise process, some smoke will still escape from the gaps in the housing 1. However, due to the extremely rapid temperature rise under abnormal conditions, most of the smoke will flow out normally from the pressure relief connector 6 after it is opened, thus causing relatively less damage to other battery boxes.

[0025] The three forms of the aforementioned reinforcing member 5 and their corresponding airflow patterns are detailed below: State 1: The reinforcing member 5 is horizontally distributed. In this state, the reinforcing member 5 and the support member 3 are perpendicular to each other. Under normal conditions, the airflow only flows in the support member 3. Under high temperature conditions, the deformation of the metal sheet 14 causes the air vent 12 to open. The high-speed airflow in the support member 3 will create a negative pressure state inside it. The reinforcing member 5, which is connected to it, will also be in a negative pressure state simultaneously. The internal air pressure of the reinforcing member 5 will be significantly lower than that inside the box 1. Therefore, most of the high-temperature airflow in the box 1 will be carried out by the reinforcing member 5 and the support member 3. However, this solution has certain drawbacks when used under high temperature conditions. Because of the perpendicular connection with the support member 3, the negative pressure state inside the reinforcing member 5 will be unstable (the active airflow in the support member 3 has...). It is possible that the airflow will not enter the reinforcing member 5, thus creating a slight negative pressure inside the reinforcing member 5, or it may enter the reinforcing member 5, causing the active airflow to pass through the air hole 12 and produce a slight active cooling effect on the inside of the box 1. In the case of abnormal high temperature (referring to excessive high temperature inside the box 1 caused by abnormal cell temperature and smoke, etc.), the air inlet 12 is opened and the switch mechanism at the bottom of the abnormal box 1 (i.e., the tail end of the support member 3) is closed, while the switch mechanism on the side (i.e., the pressure relief connector 6) is opened. Unlike the high temperature state, the airflow is guided to flow at high speed only inside the reinforcing member 5, thus creating a stable low pressure inside the reinforcing member 5, and guiding most of the smoke inside the box 1 into the interior of the reinforcing member 5 through the air hole 12, and finally discharged from the pressure relief connector 6. State 2: The left end of the reinforcing member 5 (i.e., the connection point between the reinforcing member 5 and the support member 3) is higher than the right end. Under normal conditions, the right end of the reinforcing member 5 is blocked, and the airflow will flow in the support member 3. Under high temperature conditions, the airflow in the support member 3 will actively enter the reinforcing member 5 and be blown out from the already opened air hole 12 (because the pressure relief connector 6 is still blocked at this time), achieving a better active cooling effect compared to State 1. Under abnormally high temperature conditions, it is the same as State 1. State 3: The left end of the reinforcing member 5 is lower than the right end. Under normal conditions, the airflow pattern is the same as in State 2. Under high temperature conditions, the air hole 12 is opened while the switching mechanism remains unchanged. The interior of the reinforcing member 5 will generate a negative pressure effect stronger than in State 1 and a negative pressure cooling effect different from that in State 2, but the actual effect will be lower than that in State 2. Under abnormally high temperature conditions, it is the same as in State 1 and State 2.

[0026] On the one hand, excessive support / exhaust structures would occupy too much internal space of the housing 1, resulting in a reduction in the usable space for the battery and affecting the energy storage effect of the battery box; on the other hand, because the corner area is in direct contact with the housing 1, the working temperature is much lower than that of the central area where the battery cells are stacked. Therefore, in this solution, there is no design for heat and smoke exhaust schemes for the corner space of the housing 1. Moreover, with sufficient power of the top air supply equipment, the airflow velocity inside the reinforcing member 5 is sufficient to generate a greater pressure difference. Even if it is located in the middle of the battery cells, the reinforcing member 5 can still provide auxiliary treatment for the high temperature and smoke in the corner area.

[0027] In the description of this invention, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" or "linked" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a mechanical connection or an electrical connection; it can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0029] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An internally supported energy storage battery box, comprising a box body (1) and positioning members (2) disposed at the upper and lower ends of the box body (1), and a reinforcing beam (7) disposed inside the box body (1), characterized in that: It also includes a support member (3) arranged longitudinally in the box (1). The top of the hollow structure inside the support member (3) is connected to a rigid air nozzle (4), and the tail end of the support member (3) extends through the bottom wall of the box (1) to the outside. The rigid air nozzle (4) can be used to connect to the air supply equipment or to connect to the tail end of the support member (3) in the battery box above. The support member (3) is also provided with a switch mechanism for controlling the opening and closing of the channel inside the tail end, and a switch mechanism is also provided in the pressure relief connector (6). The brackets in the two switching mechanisms are respectively installed at the tail end of the support (3) and inside the pressure relief connector (6). After the connecting strip (11) in the support (3) melts, the plug (8) moves and seals the through hole (9) in the support (3). After the connecting strip (11) in the pressure relief connector (6) melts, the plug (8) moves and opens the through hole (9) in the pressure relief connector (6).

2. The internally supported energy storage battery box according to claim 1, characterized in that: The side of the support member (3) is also connected to a horizontally distributed reinforcing member (5), and the tail end of the reinforcing member (5) is installed on the side wall of the box (1).

3. The internally supported energy storage battery box according to claim 2, characterized in that: The interior is also a hollow, fluid-permeable reinforcing member (5), the left end of which is connected to the interior of the support member (3), while the right end of the support member (3) is connected to the outside in a controllable manner through a pressure relief connector (6).

4. The internally supported energy storage battery box according to claim 1, characterized in that: The switching mechanism includes a through hole (9) and a plug (8) for sealing or opening the through hole (9). The plug (8) is connected to a bracket by an elastic element (10). The plug (8) is also connected to the bracket by a connecting strip (11) of a thermal fuse mechanism, which is used to limit the initial position of the plug (8) and keep the elastic element (10) in a compressed state.

5. The internally supported energy storage battery box according to claim 2, characterized in that: The surface of the reinforcing member (5) is provided with pores (12), which are normally blocked by a protrusion (13) with an arc-shaped edge, and the protrusion (13) is attached and fixed in the metal sheet (14).

6. The internally supported energy storage battery box according to claim 5, characterized in that: The two ends of the metal sheet (14) are slidably embedded in the reinforcing member (5) through the slip ring (15), wherein the metal sheet (14) is a shape memory alloy material.

7. The internally supported energy storage battery box according to claim 6, characterized in that: The slip ring (15) located on the left is connected to the plug (8) in the support (3) via a connecting wire (16).

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