Energy storage PACK level fire fighting structure

Abstract

The utility model relates to an energy storage PACK level fire fighting structure which comprises a battery cluster support and at least two battery modules arranged on the battery cluster support. A plurality of battery units are arranged on each battery module, and an anti-explosion valve is arranged at the top of each battery unit; in the same battery module, the explosion-proof valves of the plurality of battery units are arranged in parallel; a PACK exhaust passage is arranged at the top of each battery module; a plurality of mutually independent exhaust holes are formed in the side face, close to the battery module, of each PACK exhaust channel, the exhaust holes are formed above the anti-explosion valves, and the exhaust holes and the anti-explosion valves are arranged in a one-to-one correspondence mode. Through the structure, the safety risk during thermal runaway can be effectively reduced, and the property loss is reduced. The device is simple in structure and low in cost, combustible gas generated by thermal runaway of the energy storage system can be effectively exhausted, and heat spreading is effectively prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a fire protection structure at the energy storage PACK level. Background Art

[0002] At present, the construction scale of a single energy storage project is getting larger and larger, the number of large-scale energy storage projects is increasing continuously, and more and more energy storage technologies are applied to the power supply side, the grid side, and the industrial and commercial user side. The potential safety hazards of the projects are increasing, and the pressure on the safe operation of energy storage is also increasing accordingly.

[0003] In the existing industrial and commercial energy storage systems and large energy storage systems, the fire protection at the PACK level mainly suppresses fires by injecting fire extinguishing gases (perfluorohexanone or heptafluoropropane). When a lithium battery undergoes thermal runaway, a large amount of combustible gases such as CO and hydrogen will be generated. If these gases cannot be discharged in time, the safety risk of the battery will be greatly increased. At the same time, it also makes the fire extinguishing gas unable to extinguish the fire quickly and timely, and then it is very easy for the energy storage system to have a thermal spread situation, with relatively large potential safety hazards. Summary of the Utility Model

[0004] Based on this, the utility model provides a fire protection structure at the energy storage PACK level, aiming to solve the technical problems such as thermal spread caused by the failure of the existing energy storage system to timely discharge the combustible gases generated by thermal runaway out of the energy storage system. The structure of this application is simple and the cost is relatively low, which can effectively discharge the combustible gases generated by the thermal runaway of the energy storage system and effectively prevent thermal spread.

[0005] To achieve the above object, the embodiment of the utility model proposes the following technical solution: A fire protection structure at the energy storage PACK level, including a battery cluster bracket and at least two groups of battery modules arranged on the battery cluster bracket; a plurality of battery cells are arranged on each group of battery modules, and an explosion-proof valve is arranged on the top of each battery cell; in the same battery module, the explosion-proof valves of the plurality of battery cells are arranged in parallel with each other;

[0006] A PACK exhaust channel is arranged on the top of each group of battery modules; a plurality of independent exhaust holes are arranged on the side surface of each PACK exhaust channel close to the battery module. The exhaust holes are arranged above the explosion-proof valves and are arranged in one-to-one correspondence with the explosion-proof valves.

[0007] As a preferred embodiment, each exhaust hole is communicated with the PACK exhaust channel, and each exhaust hole is communicated with the corresponding explosion-proof valve.

[0008] As a preferred embodiment, in the same PACK exhaust passage, a plurality of the exhaust holes are arranged at equal intervals; the distance between the explosion-proof valves of two adjacent battery cells is equal to the distance between two adjacent exhaust holes; two adjacent battery cells are battery cells in the same battery module.

[0009] As a preferred embodiment, the battery cluster bracket includes two first support columns arranged in parallel, two second support columns arranged in parallel, and a support bottom plate; the two first support columns are symmetrically arranged at one end of the support bottom plate, and the two second support columns are symmetrically arranged at the other end of the support bottom plate; two groups of the battery modules are symmetrically arranged on the support bottom plate.

[0010] As a preferred embodiment, a baffle is arranged at one end of the support bottom plate close to the second support column; two first through holes adapted to the PACK exhaust passage are arranged on the baffle, and the PACK exhaust passage and the first through holes are arranged in one-to-one correspondence.

[0011] As a preferred embodiment, one end of each PACK exhaust passage close to the first support column is set as a closed end, and one end of each PACK exhaust passage close to the second support column is set as an open end.

[0012] As a preferred embodiment, each open end is clamped in the first through hole, the open end and the first through hole are arranged in one-to-one correspondence, and an explosion-proof film is arranged at each open end. By arranging the explosion-proof film, a sealing effect can be achieved, so that the PACK package reaches the IP67 level; when the pressure in the PACK exhaust passage reaches a certain condition, the explosion-proof film opens.

[0013] As a preferred embodiment, each second support column is a hollow support column; a second through hole is arranged on each second support column; the second through hole is communicated with the second support column.

[0014] As a preferred embodiment, the second through hole and the open end are arranged in one-to-one correspondence; each second through hole is connected to the corresponding open end through a connecting pipe.

[0015] As a preferred embodiment, the distance between the second through hole and the top of the second support column is equal to the distance between the first through hole and the top of the second support column.

[0016] Advantages achieved by the present utility model: Through the structure of this application, when a lithium battery undergoes thermal runaway, the explosion-proof valve of the battery cell (i.e., the single cell) opens, and the combustible gas generated by the thermally runaway battery cell enters the PACK exhaust passage through the exhaust hole. After the explosion-proof film pressure bursts, it is discharged to the connecting pipe through the open end of the PACK exhaust passage, and then discharged to the second support column through the connecting pipe (using existing structural components can save space and cost), and finally discharged to the outside of the energy storage system through the second support column, thereby effectively reducing the concentration of combustible gas generated by the thermally runaway battery cell and achieving the purpose of suppressing fire. Through the structure of this application, the safety risk during thermal runaway can be effectively reduced, and property losses can be minimized. The structure of this application is simple and the cost is low, and it can effectively discharge the combustible gas generated by the thermal runaway of the energy storage system, effectively preventing thermal spread. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model 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 drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0018] Figure 1 Overall structural schematic diagram of the energy storage PACK-level fire protection structure according to an embodiment of the present utility model;

[0019] Figure 2 For Figure 1 Partial exploded structural schematic diagram of the energy storage PACK-level fire protection structure;

[0020] Figure 3 For Figure 1 Structural schematic diagram of the PACK exhaust passage;

[0021] The realization, functional characteristics and advantages of the object of the present utility model will be further described in conjunction with the embodiments and with reference to the drawings. Detailed Embodiments

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0023] It should be noted that if there are directional indications (such as up, down, left, right, front, back, top, bottom...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative positional relationship, movement conditions, etc. between components in a specific posture (as shown in the attached drawings). If the specific posture changes, the directional indications will also change accordingly.

[0024] In this application, unless otherwise clearly defined and limited, terms such as "installed", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0025] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time.

[0026] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0027] As Figures 1 to 3 shown, the embodiments of the present utility model propose an energy storage PACK-level fire protection structure, which includes a battery cluster bracket 10 and at least two groups of battery modules 20 arranged on the battery cluster bracket 10; a plurality of battery cells 21 are arranged on each group of battery modules 20, and an explosion-proof valve 211 is arranged on the top of each battery cell 21; in the same battery module 20, the explosion-proof valves 211 of the plurality of battery cells 21 are arranged in parallel with each other;

[0028] At the top of each group of the battery modules 20, a PACK exhaust channel 30 is provided; on the side of each PACK exhaust channel 30 close to the battery module 20, a number of independent exhaust holes 31 are provided, the exhaust holes 31 are arranged above the explosion-proof valves 211, and the exhaust holes 31 are arranged in one-to-one correspondence with the explosion-proof valves 211.

[0029] The exhaust holes 31 are arranged in one-to-one correspondence with the explosion-proof valves 211, which means that one exhaust hole 31 corresponds to one explosion-proof valve 211, and the exhaust holes 31 are arranged in a matching manner with the explosion-proof valves 211. In this way, it can be ensured that the combustible gas generated by the battery unit in thermal runaway enters the PACK exhaust channel through the exhaust holes.

[0030] As a preferred embodiment, each exhaust hole 31 is communicated with the PACK exhaust channel 30, and each exhaust hole 31 is communicated with the corresponding explosion-proof valve 211. In this way, it can be ensured that the combustible gas generated by the battery unit in thermal runaway enters the PACK exhaust channel through the exhaust holes.

[0031] As a preferred embodiment, in the same PACK exhaust channel 30, a number of the exhaust holes 31 are arranged at equal intervals; the distance between the explosion-proof valves 211 of two adjacent battery units 21 is equal to the distance between two adjacent exhaust holes 31; two adjacent battery units 21 are the battery units 21 in the same battery module 20.

[0032] As a preferred embodiment, the battery cluster bracket 10 includes two parallel first support columns 11, two parallel second support columns 12 and a support bottom plate 13; the two first support columns 11 are symmetrically arranged at one end of the support bottom plate 13, and the two second support columns 12 are symmetrically arranged at the other end of the support bottom plate 13; two groups of the battery modules 20 are symmetrically arranged on the support bottom plate 13.

[0033] As a preferred embodiment, a baffle 14 is provided at one end of the support bottom plate 13 close to the second support column 12; two first through holes 141 adapted to the PACK exhaust channel 30 are provided on the baffle 14, and the PACK exhaust channel 30 is arranged in one-to-one correspondence with the first through holes 141. In this way, it can be ensured that the combustible gas generated by the battery unit in thermal runaway enters the PACK exhaust channel through the exhaust holes.

[0034] As a preferred embodiment, one end of each PACK exhaust channel 30 close to the first support column 11 is set as a closed end, and one end of each PACK exhaust channel 30 close to the second support column 12 is set as an open end.

[0035] As a preferred embodiment, each of the opening ends is clamped in the first through hole 141, the opening ends are arranged in one-to-one correspondence with the first through holes 141, and an explosion-proof film 40 is arranged at each of the opening ends. By providing the explosion-proof film 40, a sealing effect can be achieved, enabling the PACK package to reach the IP67 rating; when the pressure in the PACK exhaust passage 30 reaches certain conditions, the explosion-proof film 40 opens.

[0036] As a preferred embodiment, each of the second support columns 12 is a hollow support column; a second through hole 121 is provided on each of the second support columns 12; the second through hole 121 is communicated with the second support column 12.

[0037] As a preferred embodiment, the second through holes 121 are arranged in one-to-one correspondence with the opening ends; each of the second through holes 121 is connected to the corresponding opening end through a connecting pipe 50.

[0038] As a preferred embodiment, the distance between the second through hole 121 and the top of the second support column 12 is equal to the distance between the first through hole 141 and the top of the second support column 12.

[0039] With the structure of the present application, when a lithium battery undergoes thermal runaway, the explosion-proof valve of the battery cell (i.e., the single battery) opens, and the combustible gas generated by the thermally runaway battery cell enters the PACK exhaust passage through the exhaust hole. After the explosion-proof film bursts due to pressure, it is discharged to the connecting pipe through the opening end of the PACK exhaust passage, and then discharged to the second support column through the connecting pipe (using existing structural components can save space and cost), and finally discharged to the outside of the energy storage system through the second support column, thereby effectively reducing the concentration of the combustible gas generated by the thermally runaway battery cell and achieving the purpose of suppressing fire. With the structure of the present application, the safety risk during thermal runaway can be effectively reduced, and property losses can be minimized. The structure of the present application is simple and the cost is low, and it can effectively discharge the combustible gas generated by the thermal runaway of the energy storage system, effectively preventing thermal spread.

[0040] In the description of this specification, the description referring to terms such as "an embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example.

[0041] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only includes an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0042] The above are only the preferred embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structural transformation made under the inventive concept of the present utility model by using the content of the specification and drawings of the present utility model, or any direct / indirect application in other related technical fields shall be included within the patent protection scope of the present utility model.

Claims

1. A fire protection structure at the energy storage PACK level, characterized in that, It includes a battery cluster bracket and at least two groups of battery modules arranged on the battery cluster bracket; a number of battery cells are arranged on each group of battery modules, and an explosion-proof valve is arranged on the top of each battery cell; in the same battery module, the explosion-proof valves of a number of the battery cells are arranged in parallel with each other. A PACK exhaust channel is arranged on the top of each group of battery modules; a number of independent exhaust holes are arranged on the side of each PACK exhaust channel close to the battery module, the exhaust holes are arranged above the explosion-proof valves, and the exhaust holes are arranged in one-to-one correspondence with the explosion-proof valves.

2. The energy storage PACK-level fire protection structure according to claim 1, characterized in that, Each exhaust hole is communicated with the PACK exhaust channel, and each exhaust hole is communicated with the corresponding explosion-proof valve.

3. The energy storage PACK-level fire protection structure according to claim 1, characterized in that, In the same PACK exhaust channel, a number of the exhaust holes are arranged at equal intervals; the distance between the explosion-proof valves of two adjacent battery cells is equal to the distance between two adjacent exhaust holes; the two adjacent battery cells are battery cells in the same battery module.

4. The energy storage PACK-level fire protection structure according to claim 1, characterized in that, The battery cluster bracket includes two parallel first support columns, two parallel second support columns and a support bottom plate; the two first support columns are symmetrically arranged at one end of the support bottom plate, and the two second support columns are symmetrically arranged at the other end of the support bottom plate; the two groups of battery modules are symmetrically arranged on the support bottom plate.

5. The energy storage PACK-level fire protection structure according to claim 4, wherein A baffle is arranged at one end of the support bottom plate close to the second support column; two first through holes adapted to the PACK exhaust channels are arranged on the baffle, and the PACK exhaust channels are arranged in one-to-one correspondence with the first through holes.

6. The energy storage PACK-level fire protection structure according to claim 5, wherein One end of each PACK exhaust channel close to the first support column is set as a closed end, and one end of each PACK exhaust channel close to the second support column is set as an open end.

7. The energy storage PACK-level fire protection structure according to claim 6, characterized in that, Each open end is clamped in the first through hole, the open end is arranged in one-to-one correspondence with the first through hole, and an explosion-proof film is arranged at each open end.

8. The energy storage PACK-level fire protection structure according to claim 7, characterized in that, Each second support column is a hollow support column; a second through hole is arranged on each second support column; the second through hole is communicated with the second support column.

9. The energy storage PACK-level fire protection structure according to claim 8, characterized in that, The second through hole is arranged in one-to-one correspondence with the open end; each second through hole is connected with the corresponding open end through a connecting pipe.

10. The energy storage PACK-level fire protection structure according to claim 9, wherein, The distance between the second through hole and the top of the second support column is equal to the distance between the first through hole and the top of the second support column.

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