Battery system

Abstract

The utility model relates to a battery system. The battery system comprises a battery rack; the at least one battery cluster is mounted on the battery rack; the battery cluster comprises a plurality of battery modules which are sequentially arranged in the longitudinal direction, and each battery module comprises a plurality of battery cells; the battery rack comprises a cross beam group and a longitudinal beam, and each battery cluster is correspondingly provided with the longitudinal beam and the cross beam group; the cross beam group comprises a plurality of cross beams which are in one-to-one correspondence with the battery modules of the battery cluster, and battery core pressure release valves of the battery modules are communicated with transition channels in the corresponding cross beams; the transition channel is communicated with an exhaust channel which longitudinally extends in the longitudinal beam; the top end of the exhaust channel of each longitudinal beam is provided with the corresponding fire-fighting detector.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery system. Background Art

[0002] With the rapid development of the new energy industry, battery systems are increasingly being used in various fields. Large energy storage battery systems usually include several battery clusters, and each battery cluster includes several battery modules, and the battery module includes several battery cells, which are electrically connected to each other to meet large energy storage needs.

[0003] In order to prevent thermal runaway from spreading between different battery modules in the battery system and causing uncontrollable consequences, the fire protection solution generally adopts battery module-level fire detection, which alarms exhaust or starts battery module-level fire extinguishing and explosion disposal after fire linkage. However, this solution requires a fire detector to be set for each battery module, resulting in high detection costs. At the same time, within the limited service life of the battery system, the fire detectors in the battery module face the problem of multiple replacements. When replacing, the battery module packaging box needs to be removed and the packaging box needs to be reinstalled after replacement, which results in high operation and maintenance costs. Utility Model Content

[0004] Based on this, it is necessary to provide a battery system that can reduce costs in order to address the problems of high detection costs and operation and maintenance costs of traditional battery systems.

[0005] A battery system, comprising:

[0006] Battery rack;

[0007] At least one battery cluster is installed on the battery rack; the battery cluster includes a plurality of battery modules arranged in sequence in the longitudinal direction, and each of the battery modules includes a plurality of battery cells;

[0008] The battery rack includes a crossbeam group and a longitudinal beam, each battery cluster is provided with the longitudinal beam and the crossbeam group; the crossbeam group includes a plurality of crossbeams corresponding to the battery modules of the battery cluster, the cell pressure relief valves of the battery modules are connected to the transition channels in the corresponding crossbeams; the transition channels are connected to the exhaust channels extending longitudinally in the corresponding longitudinal beams;

[0009] A fire detector is provided at the top of the exhaust passage of each longitudinal beam.

[0010] In the above-mentioned battery system, the cell pressure relief valve of the battery module of the battery cluster is connected to the transition channel of the crossbeam, the transition channel of the crossbeam of the crossbeam group is connected to the exhaust channel of the corresponding longitudinal beam, and the fire detector is arranged at the top of the exhaust channel. In this way, the thermal runaway gas (smoke) generated by all the cells of the same battery cluster finally converges into the exhaust channel of the longitudinal beam through the transition channel in the crossbeam, and reaches the fire detector through the exhaust channel to be detected, thereby realizing the battery cluster-level thermal runaway detection. Compared with the battery module-level thermal runaway detection in the prior art, when any battery module of the battery cluster is in thermal runaway, the fire detector can detect it, and its detection level is equivalent to the battery module-level detection level in the prior art, but the number of fire detectors is much smaller than the number of battery modules included in the battery cluster, reducing the number of fire detectors. Generally, the number of fire detectors can be reduced by more than 80% compared with the battery module-level detection method in the prior art, thereby reducing the detection cost. At the same time, since each fire detector is arranged at the top of the exhaust passage of the longitudinal beam, it is easy to take out the fire detector from the top of the longitudinal beam for replacement. It is no longer necessary to remove the packaging box of the battery module and reinstall the packaging box after replacement as in the prior art. It is simple and easy to operate, and convenient to maintain, which greatly reduces the operation and maintenance cost of the fire detector.

[0011] In one embodiment, each of the battery modules includes a plurality of battery cells arranged in sequence along a first transverse direction;

[0012] Each battery cluster is correspondingly provided with two groups of the beam groups, the two groups of the beam groups are respectively located at the two ends of the battery cluster along the second transverse direction, and the beams extend along the first transverse direction; some of the battery cell pressure relief valves of the battery module are connected to the transition channels of the beams of one group of the beam groups, and the remaining battery cell pressure relief valves are connected to the transition channels of the beams of another group of the beam groups.

[0013] In one embodiment, each battery cluster is provided with two longitudinal beams, each group of the cross beam groups is provided with one longitudinal beam, and the transition channel of the cross beam of each group of the cross beam groups is connected to the exhaust channel of the same longitudinal beam.

[0014] In one embodiment, each battery cluster is provided with four longitudinal beams, one group of cross beam groups corresponds to two longitudinal beams, the transition channels of some cross beams of each cross beam group are connected to the exhaust channels of one longitudinal beam, and the transition channels of the remaining cross beams are connected to the exhaust channels of another longitudinal beam.

[0015] In one embodiment, the longitudinal beam is located at an end of the cross beam group in the first transverse direction.

[0016] In one embodiment, at least two of the battery clusters correspond to at least one identical longitudinal beam.

[0017] In one embodiment, the battery system includes at least one battery cluster group arranged in the second transverse direction, and each battery cluster group includes a plurality of battery clusters arranged in the first transverse direction;

[0018] The longitudinal beam is arranged between at least two adjacent battery clusters in each battery cluster group, and the two adjacent battery clusters share the longitudinal beam.

[0019] In one of the embodiments, the crossbeam includes a main body and a transition piece, wherein the transition piece is mounted on the main body, the transition piece is provided with an air inlet, the battery cell pressure relief valve is connected to the air inlet, and the air inlet is connected to the exhaust channel through the transition channel.

[0020] In one of the embodiments, the battery system further includes a longitudinal beam pressure relief valve, the longitudinal beam pressure relief valve is provided at the top end of at least one of the longitudinal beams, and the longitudinal beam pressure relief valve is used to seal the exhaust channel.

[0021] In one of the embodiments, the battery system further includes a cover, which is wrapped around the battery rack to isolate the battery cluster from external gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A structural diagram of a battery system provided in one embodiment of the present application;

[0023] Figure 2 for Figure 1 Another perspective of the battery system shown in the structure diagram ( Figure 2 A battery cluster is omitted);

[0024] Figure 3 for Figure 1 A partial cross-sectional view of the battery system shown in ( Figure 3 Fire detectors are revealed in the

[0025] Figure 4 for Figure 2 The structure shown in the figure omits part of the structure;

[0026] Figure 5 for Figure 4 A magnified view of the structure shown in FIG.

[0027] Figure 6 A structural diagram of a battery system provided in another embodiment of the present application.

[0028] Description of reference numerals:

[0029] 100. Battery system; 10. Battery rack; 11. Accommodation space; 12. Beam group; 121. Beam; 1211. Main body; 1212. Transition piece; 1213. Transition channel; 1214. Air inlet; 13. Longitudinal beam; 131. Exhaust channel; 14. Frame; 15. Pallet; 20. Battery cluster; 21. Battery module; 211. Battery cell; 30. Fire detector; 40. Longitudinal beam pressure relief valve; 50. Skin. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0033] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0035] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0036] See also Figure 1 In one embodiment of the present application, a battery system 100 is provided, which can store electrical energy and release the electrical energy to supply power when needed. In some specific implementations, the battery system 100 is applied to an energy storage system. It is conceivable that in some other implementations, the battery system 100 can also be applied to other fields, such as electric vehicles and railway locomotive industries.

[0037] See also Figure 2 The battery system 100 includes a battery rack 10 and a battery cluster 20. The battery rack 10 has at least one storage space 11, and one battery cluster 20 is disposed in one storage space 11. In some specific embodiments, the battery rack 10 has multiple storage spaces 11. Since one battery cluster 20 is installed in one storage space 11, the battery system 100 includes multiple battery clusters 20. Of course, in some other specific embodiments, the battery rack 10 may also have only one storage space 11, and the battery system 100 includes only one battery cluster 20, which is not limited here.

[0038] See also Figure 1-Figure 3 Each battery cluster 20 includes a plurality of battery modules 21 arranged in sequence in the longitudinal direction, and each battery module 21 includes a plurality of battery cells 211. Specifically, each battery cell 211 is provided with a battery cell pressure relief valve, and the battery cell 211 is depressurized by the battery cell pressure relief valve. The transverse direction is perpendicular to the longitudinal direction, the longitudinal direction is parallel to the vertical direction, and the transverse direction is parallel to the horizontal direction. The longitudinal direction is Figure 1 and Figure 2 Middle Z direction.

[0039] See also Figure 4 It should be noted that, in order to facilitate the carrying of the battery module 21 , a plurality of support plates 15 are sequentially arranged in the longitudinal direction in each accommodating space 11 , and each support plate 15 is used to support one battery module 21 .

[0040] In some embodiments, continue to refer to Figure 1 and Figure 2 The battery rack 10 includes a cross beam group 12 and a longitudinal beam 13 , and each battery cluster 20 is correspondingly provided with a longitudinal beam 13 and a cross beam group 12 .

[0041] It should be noted that each battery cluster 20 is provided with a longitudinal beam 13 and a cross beam group 12, which means that the battery cluster 20 has a corresponding longitudinal beam 13 and a cross beam group 12, but the number of battery clusters 20, longitudinal beams 13 and cross beam groups 12 is not always equal. For example, one battery cluster 20 may be provided with one cross beam group 12 or two cross beam groups 12, or one battery cluster 20 may be provided with one longitudinal beam 13, two longitudinal beams 13 or more than two longitudinal beams 13. It should also be noted that the longitudinal beams 13 and cross beam groups 12 provided with the battery clusters 20 are also provided with corresponding ones.

[0042] For further information, see Figure 3 and Figure 5 The crossbeam group 12 includes a plurality of crossbeams 121, and the crossbeams 121 are arranged one by one with the battery modules 21 of the battery cluster 20. The cell pressure relief valve of each battery module 21 is connected to the transition channel 1213 in the corresponding crossbeam 121, and the transition channel 1213 of each crossbeam 121 of the crossbeam group 12 is connected to the exhaust channel 131 of the corresponding longitudinal beam 13, and the exhaust channel 131 is longitudinally extended in the longitudinal beam 13. The battery system 100 also includes a fire detector 30, and a fire detector 30 is provided at the top of the exhaust channel 131 of each longitudinal beam 30. Optionally, the crossbeam 121 is directly connected to the support plate 15, and the longitudinal beam 13 is directly connected to the crossbeam 121. Of course, in some other embodiments, it can also be arranged that the support plate 15 is not directly connected to the crossbeam 121, the support plate 15 is directly connected to the longitudinal beam 13, and the crossbeam 121 is directly connected to the longitudinal beam 13, which is not limited here.

[0043] It should be noted that, please continue to refer to Figure 4 In order to ensure that the cross beam 121, the longitudinal beam 13 and the support plate 15 are stably connected, the battery rack 10 also includes a frame 14, the cross beam 121 is connected to the frame 14 and forms a receiving space 11 with the frame 14, the support plate 15 is arranged in the receiving space 11 formed by the frame 14 and the cross beam 121, and the longitudinal beam 13 is connected to the frame 14.

[0044] In the battery system 100 provided in the embodiment of the present application, the cell pressure relief valve of the battery module 21 of the battery cluster 20 is connected to the transition channel 1213 of the crossbeam 121, the transition channel 1213 of the crossbeam 121 of the crossbeam group 12 is connected to the exhaust channel 131 of its corresponding longitudinal beam 13, and the fire detector 30 is arranged at the top of the exhaust channel 131. In this way, the thermal runaway gas (smoke) generated by all the battery cells 211 of the same battery cluster 20 finally converges into the exhaust channel 131 of the longitudinal beam 13 through the transition channel 1213 in the cross beam 121, and reaches the fire detector 30 through the exhaust channel 131 to be detected, thereby realizing battery cluster-level thermal runaway detection. Compared with the battery module-level thermal runaway detection in the prior art, when any battery module 21 of the battery cluster 20 is in thermal runaway, the fire detector 30 can detect it, and its detection level is equivalent to the battery module-level detection level in the prior art. However, the number of fire detectors 30 is much smaller than the number of battery modules 21 included in the battery cluster 20, thereby reducing the number of fire detectors 30. Generally, the number of fire detectors 30 can be reduced by more than 80% compared with the battery module-level detection method in the prior art, thereby reducing the detection cost. At the same time, since each fire detector 30 is arranged at the top of the exhaust channel 131 of the longitudinal beam 13, it is easy to take out the fire detector 30 from the top of the longitudinal beam 13 for replacement. It is no longer necessary to remove the packaging box of the battery module 21 and reinstall the packaging box after replacement as in the prior art. This is simple and easy to operate, and convenient to maintain, which greatly reduces the operation and maintenance cost of the fire detector 30.

[0045] In some embodiments, see Figure 3 , each battery module 21 includes a plurality of battery cells 211 arranged in sequence along the first transverse direction. Each battery cluster 20 is arranged corresponding to two groups of beam groups 12, and the two groups of beam groups 12 are respectively located at the two ends of the battery cluster 20 in the second transverse direction, and the beams 121 extend along the first transverse direction. Some of the battery cell pressure relief valves of the battery module 21 are connected to the transition channels 1213 of the beams 121 of one group of beam groups 12, and the remaining battery cell pressure relief valves are connected to the transition channels 1213 of the other group of beams 121. The first transverse direction intersects with the second transverse direction. Specifically, the first transverse direction is perpendicular to the second transverse direction. See Figure 1 and Figure 2 , the first horizontal Figure 1 and Figure 2 In the middle Y direction, the second horizontal direction is Figure 1 and Figure 2 Middle X direction.

[0046] Since the pressure relief valves of the battery cells of the battery module 21 are arranged in a certain order, such as the pressure relief valves of the battery cells at odd positions in the first transverse direction are located at the same end in the second transverse direction, and the pressure relief valves of the battery cells at even positions are located at the same end in the second transverse direction. The above arrangement enables the pressure relief valves of the battery cells at odd positions to communicate with the transition channels 1213 of the beams 121 of one group of beam groups 12, and the pressure relief valves of the battery cells at even positions to communicate with the transition channels 1213 of the beams 121 of another group of beam groups 12, ensuring that the thermal runaway gas of each battery cell 211 can flow into the transition channel 1213 and be discharged to the exhaust channel 131, so as to be detected by the fire detector 30. Figure 1 The red arrows in the figure indicate the flow direction of the thermal runaway gas in a battery cluster 20, that is, the thermal runaway gas in one of the odd and even positions in each battery module 21 flows to the left crossbeam group 12, and flows from the crossbeam 121 of the left crossbeam group 12 to its corresponding longitudinal beam 30, and the thermal runaway gas in the other of the odd and even positions flows to the right crossbeam group 12, and flows from the crossbeam 121 of the right crossbeam group 12 to its corresponding longitudinal beam 30. The flow direction of the thermal runaway gas generated in other battery clusters 20 is the same as that of the thermal runaway gas generated in the above battery cluster 20.

[0047] In some specific implementations, please refer to Figure 1-Figure 3 Each battery cluster 20 is provided with two longitudinal beams 13, each cross beam group 12 is provided with one longitudinal beam 13, and the transition channel 1213 of the cross beam 121 of each cross beam group 12 is connected with the exhaust channel 131 of the same longitudinal beam 13. In this way, the thermal runaway gas in the transition channel 1213 of the cross beam 121 in each cross beam group 12 can be discharged into the same exhaust channel 131, avoiding the thermal runaway gas in the cross beams 121 of the two cross beam groups 12 being discharged into the same exhaust channel 131 through pipelines, thereby simplifying the structural setting.

[0048] In some other specific embodiments, each battery cluster 20 may be provided with four longitudinal beams 13, one group of cross beam groups 12 corresponds to two longitudinal beams 13, the transition channels 1213 of some cross beams 121 of each group of cross beam groups 12 are connected to the exhaust channel 131 of one longitudinal beam 13, and the transition channels 1213 of the remaining cross beams 121 are connected to the exhaust channel 131 of another longitudinal beam 13.

[0049] It is understandable that in some other embodiments, each battery cluster 20 may be provided with three longitudinal beams 13 or more than four longitudinal beams 13. Generally, the number of longitudinal beams 13 is less than the number of battery modules 21 included in the battery cluster 20.

[0050] Optionally, the longitudinal beam 13 is located at one end of the cross beam group 12 in the first transverse direction, so that the transition channel 1213 can be opened in the cross beam 121 along the extension direction of the cross beam 121, and is connected to the exhaust channel 131 in the longitudinal beam 13 at one end in the extension direction of the cross beam 121, so as to facilitate the thermal runaway gas to flow in the transition channel 1213 and flow out into the exhaust channel 131 through the transition channel 1213.

[0051] It is understandable that in some other embodiments, a longitudinal beam 13 corresponding to the cross beam group 12 may be provided at one end of the cross beam group 12 along the second transverse direction, which is not limited here.

[0052] In some embodiments, see Figure 1 and Figure 3 At least two battery clusters 20 correspond to at least one identical longitudinal beam 13, so the number of longitudinal beams 13 can be reduced. Since the number of fire detectors 30 is equal to the number of longitudinal beams 13, the number of fire detectors 30 is reduced, thereby reducing the detection cost.

[0053] Furthermore, the battery system 100 includes at least one battery cluster group arranged in the second transverse direction, each battery cluster group includes a plurality of battery clusters 20 arranged in the first transverse direction. A longitudinal beam 13 is provided between at least two adjacent battery clusters 20 in each battery cluster 20, and the two adjacent battery clusters 20 share the longitudinal beam 13.

[0054] In the above arrangement, since at least some of the adjacent battery clusters 20 share the longitudinal beam 13, the number of fire detectors 30 can be reduced, thereby reducing the detection cost.

[0055] In some specific implementations, please refer to Figure 1-Figure 3 The battery system 100 includes five battery cluster groups arranged in the second transverse direction, and each battery cluster group includes two battery clusters 20 arranged in the first transverse direction. Two longitudinal beams 13 are arranged between the two battery clusters 20 of each battery cluster group, and the two battery clusters 20 of each battery cluster group share two longitudinal beams 13. That is, the thermal runaway gas generated by the two battery clusters 20 is discharged from the two ends of the first transverse direction to the two longitudinal beams 13, and the fire detectors 30 in the two longitudinal beams 13 can detect the thermal runaway gas generated by the two battery clusters 20. In this way, the number of longitudinal beams 13 is equal to the number of battery clusters 20, which reduces the number of fire detectors 30 and reduces the detection cost.

[0056] Specifically, each battery cluster 20 includes 10 battery modules 21 arranged in sequence in the longitudinal direction. Since each battery cluster group includes two battery clusters 20, the battery system 100 includes 10 battery clusters 20, and the 10 battery clusters 20 have a total of 100 battery modules 21. The two battery clusters 20 of each battery cluster group share two longitudinal beams 13, that is, each battery cluster group corresponds to 2 fire detectors 30, and the five battery cluster groups are provided with a total of 10 fire detectors 30. If the battery module-level fire detection in the prior art is adopted, 100 battery clusters need to be set. It can be seen that in this specific embodiment, while ensuring a better detection effect, the number of fire detectors 30 is reduced by 90 compared with the prior art, that is, the number of fire detectors 90 used is reduced by 90%.

[0057] Furthermore, all the longitudinal beams 13 are arranged in an array along the second transverse direction and the first transverse direction, that is, all the longitudinal beams 13 are arranged in rows along the first transverse direction and in columns along the second transverse direction. In this way, the longitudinal beams 13 are arranged in a regular manner, and the space occupied by the battery system 100 is reduced.

[0058] In some embodiments, continue to refer to Figure 5 The cross beam 121 includes a main body 1211 and a transition piece 1212. The main body 1211 is connected to the frame 14, and the transition piece 1212 is installed on the main body 1211. The transition piece 1212 is provided with an air inlet 1214, which is connected to the battery pressure relief valve. The cross beam 121 or the transition piece 1212 is provided with the above-mentioned transition channel 1213, and the air inlet 1214 is connected to the exhaust channel 131 through the transition channel 1213. In this way, the cross beam 121 is set as a separate main body 1211 and a transition piece 1212. After the main body 1211, the frame 14 and the longitudinal beam 13 are connected to form the main structure of the battery rack 10, the transition piece 1212 is installed on the main structure, which is convenient for the installation of each structure.

[0059] It is understandable that in some other embodiments, the cross beam 121 may also omit the transition piece 1212 , and in this case, the air inlet 1214 and the transition channel 1213 are both disposed on the main body 1211 .

[0060] In some embodiments, see Figure 6 The battery system 100 further includes a longitudinal beam pressure relief valve 40. A longitudinal beam pressure relief valve 40 is provided at the top of at least one longitudinal beam 13. The longitudinal beam pressure relief valve 40 is used to seal the exhaust passage. In this way, when the battery cluster 20 is in thermal runaway, the thermal runaway gas flows to the exhaust passage 131 through the transition passage 1213, and then flows through the exhaust passage 131 to the longitudinal beam pressure relief valve 40, where the pressure is relieved. Of course, in some other embodiments, the battery system 100 may also omit the longitudinal beam pressure relief valve 40, which is not limited here.

[0061] In some embodiments, continue to refer to Figure 6 The battery system 100 further includes a cover 50, which is wrapped around the battery rack 10 to isolate the battery cluster 20 from the outside air. This arrangement facilitates the battery system 100 to be applied to places with strict requirements on salt spray and humidity. It is understood that in some other embodiments, the battery system 100 may also omit the cover 50 for places with looser requirements on salt spray and humidity.

[0062] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0063] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A battery system, characterized in that: include: Battery rack (10); At least one battery cluster (20) is installed on the battery rack (10); the battery cluster (20) comprises a plurality of battery modules (21) arranged in sequence in the longitudinal direction, and each of the battery modules (21) comprises a plurality of battery cells (211); The battery rack (10) comprises a crossbeam group (12) and a longitudinal beam (13), each battery cluster (20) being provided with the longitudinal beam (13) and the crossbeam group (12) in correspondence; the crossbeam group (12) comprises a plurality of crossbeams (121) corresponding one to the battery modules (21) of the battery cluster (20); the cell pressure relief valves of the battery modules (21) are in communication with transition channels (1213) in the corresponding crossbeams (121); the transition channels (1213) are in communication with exhaust channels (131) extending longitudinally in the corresponding longitudinal beams (13); A fire detector (30) is provided at the top end of the exhaust passage of each longitudinal beam (13).

2. The battery system according to claim 1, characterized in that: Each of the battery modules (21) comprises a plurality of battery cells (211) arranged in sequence along a first transverse direction; Each battery cluster (20) is provided with two groups of the cross beam groups (12), the two groups of the cross beam groups (12) are respectively located at two ends of the battery cluster (20) along the second transverse direction, and the cross beams (121) extend along the first transverse direction; some of the battery cell pressure relief valves of the battery module (21) are connected to the transition channels (1213) of the cross beams (121) of one group of the cross beam groups (12), and the remaining battery cell pressure relief valves are connected to the transition channels (1213) of the cross beams (121) of another group of the cross beam groups (12).

3. The battery system according to claim 2, characterized in that: Each battery cluster (20) is provided with two longitudinal beams (13), each group of the transverse beam groups (12) is provided with one longitudinal beam (13), and the transition channel (1213) of the transverse beam (121) of each group of the transverse beam groups (12) is connected to the exhaust channel (131) of the same longitudinal beam (13).

4. The battery system according to claim 2, characterized in that: Each battery cluster (20) is provided with four longitudinal beams (13), one group of transverse beam groups (12) corresponds to two longitudinal beams (13), the transition channels (1213) of part of the transverse beams (121) of each transverse beam group (12) are connected to the exhaust channel (131) of one longitudinal beam (13), and the transition channels (1213) of the remaining part of the transverse beams (121) are connected to the exhaust channel (131) of another longitudinal beam (13).

5. The battery system according to claim 3 or 4, characterized in that: The longitudinal beam (13) is located at the end of the cross beam group (12) in the first transverse direction.

6. The battery system according to claim 1, characterized in that: At least two of the battery clusters (20) correspond to at least one identical longitudinal beam (13).

7. The battery system according to claim 6, characterized in that: The battery system comprises at least one battery cluster group arranged in a second transverse direction, each battery cluster group comprising a plurality of battery clusters (20) arranged in a first transverse direction; The longitudinal beam (13) is provided between at least two adjacent battery clusters (20) in each battery cluster group, and the two adjacent battery clusters (20) share the longitudinal beam (13).

8. The battery system according to claim 1, characterized in that: The crossbeam (121) comprises a main body (1211) and a transition piece (1212), wherein the transition piece (1212) is mounted on the main body (1211), the transition piece (1212) is provided with an air inlet (1214), the battery cell pressure relief valve is in communication with the air inlet (1214), and the air inlet (1214) is in communication with the exhaust channel (131) via the transition channel (1213).

9. The battery system according to claim 1, characterized in that: The battery system further comprises a longitudinal beam pressure relief valve (40), wherein the longitudinal beam pressure relief valve (40) is provided at the top end of at least one of the longitudinal beams (13), and the longitudinal beam pressure relief valve (40) is used to seal the exhaust passage (131).

10. The battery system according to claim 1, characterized in that: The battery system further comprises a cover (50), wherein the cover (50) is wrapped around the battery rack (10) to isolate the battery cluster (20) from communication with external gas.

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