Battery system

Abstract

The application discloses a battery system and belongs to the technical field of batteries. The battery system comprises a box body and a plurality of battery modules. The battery modules of the battery system are horizontally placed in a containing space of the box body. A frame in the box body is provided with a pressure relief opening and a pressure relief valve on the outer side face. When the battery cells in the battery modules are relieved of pressure, the high-temperature gas discharged by the battery cells can be directly discharged into the containing space and then directly discharged out of the containing space from the pressure relief opening through the pressure relief valve, so that the battery cells are relieved of pressure. In this way, the battery system in the application does not need to additionally set a pressure relief channel in the height direction, the overall height of the battery system is smaller, and the battery system can comprise a plurality of battery modules horizontally placed in the containing space, and the energy density of the battery system is also higher.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery system. Background Technology

[0002] In recent years, the emergence of new energy vehicles has played a huge role in promoting social development and environmental protection. As a rechargeable battery, the power source of new energy vehicles is widely used in the field of new energy vehicles.

[0003] Currently, battery systems used in new energy vehicles, such as hybrid models, need to have a certain energy density to ensure that these vehicles have good driving range. The larger the volume of the battery modules in the battery system, the greater the energy density of the battery system.

[0004] However, the overall height of the battery system needs to be compatible with the chassis height of the new energy vehicle. The overall height of the battery system used in new energy vehicles with lower chassis needs to be smaller, and the energy density of the battery system also needs to be smaller. Utility Model Content

[0005] This application provides a battery system. It addresses the limitations of existing battery systems used in low-chassis vehicles, such as height restrictions and low energy density. The technical solution is as follows:

[0006] On the one hand, a battery system is provided, including: a housing and multiple battery modules;

[0007] The enclosure includes: a frame, a first cover plate, and a second cover plate; the first cover plate and the second cover plate are respectively connected to the two opposite sides of the frame in the height direction, and the frame, the first cover plate, and the second cover plate form an accommodating space;

[0008] The plurality of battery modules are located within the accommodating space, and each battery module includes a plurality of battery cells. The axial direction of the battery cells is parallel to a first direction, and the first direction is perpendicular to the height direction of the frame.

[0009] The outer side of the frame has a pressure relief port that penetrates the frame, the pressure relief port is connected to the accommodating space, and a pressure relief valve is provided at the location of the pressure relief port.

[0010] Optionally, the plurality of cells in the same battery module are arranged in at least two rows in the height direction of the frame, and the plurality of cells in the same row are arranged in a second direction, which is perpendicular to the first direction and perpendicular to the height direction of the frame.

[0011] The frame includes: two first borders disposed opposite to each other in the second direction, and two second borders disposed opposite to each other in the first direction, wherein the ends of the first borders are connected to the ends of the second borders;

[0012] The pressure relief port is located on either of the two first frames and extends through the first frame along the second direction.

[0013] Optionally, the battery cell has an explosion-proof valve at one end in the first direction, and the ends of the multiple battery cells in the same battery module that have the explosion-proof valves facing the same direction;

[0014] The first frame has multiple pressure relief ports, and one pressure relief port corresponds to one or two battery modules;

[0015] Each of the pressure relief ports is located on the first frame at a position close to the side where multiple explosion-proof valves are distributed in the corresponding battery module.

[0016] Optionally, the interior of the first frame has a communication channel communicating with the plurality of pressure relief ports, the extension direction of the communication channel being parallel to the extension direction of the first frame.

[0017] Optionally, the plurality of battery modules are arranged along the first direction, and the interior of the frame has a plurality of pressure relief channels arranged along the first direction; the plurality of pressure relief channels are connected one-to-one with the plurality of pressure relief ports provided on the first frame; and one pressure relief channel corresponds to one or two battery modules, and each pressure relief channel is located on one side of the plurality of explosion-proof valves distributed in the corresponding battery module.

[0018] Optionally, the plurality of pressure relief channels include: two first pressure relief channels, and at least one second pressure relief channel located between the two first pressure relief channels;

[0019] The two first pressure relief channels correspond to two battery modules located at the edge of the plurality of battery modules, and each first pressure relief channel is located on one side of the plurality of explosion-proof valves distributed in the corresponding battery module;

[0020] One of the second pressure relief channels corresponds to two battery modules located in the middle and arranged adjacently among the plurality of battery modules. The two battery modules corresponding to one of the second pressure relief channels are arranged face to face on one side of the explosion-proof valve, and the second pressure relief channel is located between the two corresponding battery modules.

[0021] Optionally, the housing further includes: two first partitions disposed inside the frame, the two first partitions corresponding to two battery modules located at the edge of the plurality of battery modules respectively, each first partition having a first pressure relief channel inside, each first partition having a first mounting port communicating with the first pressure relief channel on the side of the corresponding battery module in the first direction, and the side of the battery module in which the explosion-proof valve is disposed being connected to the first partition at the first mounting port.

[0022] Optionally, at least a portion of at least one of the first partition portions may be reused as the same structure as the second frame.

[0023] Optionally, the housing further includes: at least one second partition provided inside the frame, each second partition corresponding to two battery modules located in the middle and arranged adjacently among the plurality of battery modules, the second partition having a second pressure relief channel inside, and the second partition having two second mounting ports communicating with the second pressure relief channel, the two second mounting ports being located on both sides of the second partition in the first direction, and the side of the battery module where the explosion-proof valve is provided being connected to the second partition at the second mounting port.

[0024] Optionally, the housing further includes an auxiliary baffle disposed inside the second pressure relief channel, wherein the overall extension direction of the auxiliary baffle is parallel to the extension direction of the second pressure relief channel.

[0025] Optionally, the auxiliary baffle includes: a plurality of first sub-baffles and a plurality of second sub-baffles arranged alternately in the second direction, wherein adjacent first sub-baffles and second sub-baffles overlap, and adjacent first sub-baffles and second sub-baffles are spaced apart in the first direction.

[0026] The beneficial effects of the technical solutions provided in this application include at least the following:

[0027] The battery modules of the battery system are placed horizontally within the housing space. A pressure relief port and a pressure relief valve are provided on the outer surface of the frame within the housing. When the cells in the battery modules are depressurized, the high-temperature gas emitted by the cells can be directly discharged into the housing space, and then directly discharged out of the housing space through the pressure relief port and the pressure relief valve, thus achieving cell depressurization. In this way, the battery system of this application does not require an additional pressure relief channel in the height direction, the overall height of the battery system is relatively small, and the battery system can include multiple battery modules placed horizontally within the housing space. The energy density of the battery system is also relatively high. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a cross-sectional view of a battery system;

[0030] Figure 2 This is a schematic diagram of the structure of the lower cover plate of a battery;

[0031] Figure 3 This is a schematic diagram of the structure of a battery system provided in an embodiment of this application;

[0032] Figure 4 yes Figure 3 An exploded view of the battery system is shown.

[0033] Figure 5 This is a partial structural schematic diagram of a battery system provided in an embodiment of this application;

[0034] Figure 6 This is a schematic diagram of the structure of a battery module provided in an embodiment of this application;

[0035] Figure 7 This is a top view of a portion of the structure of a battery system provided in an embodiment of this application;

[0036] Figure 8 This is a top view of a portion of the structure of another battery system provided in this application embodiment;

[0037] Figure 9 This is a partial structural schematic diagram of a battery system provided in an embodiment of this application;

[0038] Figure 10 This is an exploded view of a battery module provided in an embodiment of this application;

[0039] Figure 11 This is a partial structural schematic diagram of another battery system provided in an embodiment of this application;

[0040] Figure 12 This is a partial structural diagram of a frame provided in an embodiment of this application;

[0041] Figure 13 This is a top view of a box without a first cover, as provided in this embodiment of the application. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0043] Please refer to the relevant technologies. Figure 1 , Figure 1 This is a cross-sectional view of a battery system, which may include a housing 01 and a battery module 02. The housing 01 in the battery system may include a frame 011, an upper cover 012, and a lower cover 013. The upper cover 012 and lower cover 013 are respectively connected to opposite sides of the frame 011 in the height direction. The frame 011, upper cover 012, and lower cover 013 can enclose a receiving space 01a. The battery module 02 in the battery system can be located within the receiving space 01a of the housing 01. The battery module 02 may include multiple battery cells 021, and the extending direction of the multiple battery cells 021 of the battery module 02 is parallel to the height direction of the frame 011.

[0044] Each of the multiple battery cells 021 in the battery module 02 is equipped with an explosion-proof valve A at one end of the frame 011 along its height direction. When the internal pressure of the battery cell 021 is too high, the explosion-proof valve A on the battery cell 021 can open to release the internal pressure and prevent the battery cell 021 from exploding.

[0045] In battery module 02, the ends of the explosion-proof valves A in the multiple cells 021 can all face the lower cover plate 013. To ensure normal pressure relief of the cells 021, a certain distance is required between the battery module 021 and the lower cover plate 013 in the height direction of the frame 011 to form a pressure relief channel. Thus, when the height of the battery module 02 in the battery system is fixed, the pressure relief channel occupies a certain space in the height direction of the frame 011, resulting in a relatively large overall height of the battery system. This makes it difficult to apply this battery system to new energy vehicles with low chassis. Conversely, when the height of the battery system is fixed, the pressure relief channel occupying a certain space restricts the height of the battery module 02, resulting in a smaller height of the battery module 02, and consequently, a lower energy density of the battery module 02 and the battery system as a whole.

[0046] In addition, such as Figure 2 As shown, Figure 2This is a schematic diagram of the structure of a lower cover plate of a battery. In the related art, the lower cover plate 013 of the battery system housing 01 may include a cover plate body 0131 and side frame frames 0132 connected to the perimeter of the cover plate body 0131. The cover plate body 0131 of the lower cover plate 013 may be positioned opposite to one end of the battery module 02 distributing explosion-proof valves in the height direction of the frame 011. The side frame frames 0132 in the lower cover plate 013 have a communicating channel inside. At one location on the side frame frame 0132, a through hole B1 is provided on the side facing the pressure relief channel when viewed from the side. The through hole B1 communicates with the pressure relief channel. At another location on the side frame frame 0132, a pressure relief valve B2 is installed on the side facing away from the pressure relief channel. The pressure relief valve B2 communicates with the communicating channel.

[0047] Thus, when cell 021 is depressurized, the high-temperature gas released by cell 021 needs to first enter the depressurization channel, then be discharged from the depressurization channel through the through hole B1 into the connecting channel, and then move to the depressurization valve in the connecting channel before being discharged to the outside through the depressurization valve. This results in a long depressurization path for cell 021, a slow exhaust speed, and the depressurization path is prone to blockage.

[0048] This application provides a battery system, please refer to... Figure 3 and Figure 4 , Figure 3 This is a schematic diagram of a battery system provided in an embodiment of this application. Figure 4 yes Figure 3 The exploded view of the battery system shown includes a housing 100 and multiple battery modules 200.

[0049] The housing 100 in the battery system may include a frame 101, a first cover plate 102, and a second cover plate 103. The first cover plate 101 and the second cover plate 102 in the housing 100 may be connected to opposite sides of the frame 101 in the height direction, and the frame 101, the first cover plate 102, and the second cover plate 103 may form an accommodating space K. It should be noted that in the accompanying drawings of this application, the height direction of the frame 101 may be parallel to a third direction Z.

[0050] Multiple battery modules 200 in the battery system can be located within the accommodating space K of the housing 100. Each battery module 200 can include multiple battery cells 201, and the axial direction of the multiple battery cells 201 can be parallel to a first direction X. Here, the first direction X can be perpendicular to the height direction of the housing 101. It should be noted that the battery cells 201 in the battery module 200 of this application can be cylindrical cells, thus the axial direction of the cylindrical cells can be parallel to the first direction X.

[0051] The outer side of the frame 101 in the housing 100 may have a pressure relief port V that penetrates the frame 101. The pressure relief port V can communicate with the receiving space K of the housing 100, and a pressure relief valve is provided at the location of the pressure relief port V. The axial direction of the multiple cells 201 in the battery module 200 is parallel to the first direction X. That is, the multiple cells 201 in the battery module 200 can be placed horizontally in the receiving space K of the housing 100. In this way, the explosion-proof valve A provided at the end of the cell 201 can face the frame 100. When the cell 201 is depressurized, the high-temperature gas discharged by the cell 201 can be discharged into the receiving space K through the explosion-proof valve A, and then discharged outside the receiving space K through the pressure relief port V and the pressure relief valve on the frame 101, so as to realize the pressure relief of the cell 201.

[0052] Compared to related technologies, the battery module 200 of the battery system in this application is placed horizontally within the housing space K of the casing 100. A pressure relief port V and a pressure relief valve are provided on the outer surface of the frame 101 within the casing 100. When the cell 201 in the battery module 200 is depressurized, the high-temperature gas emitted by the cell 201 can be directly discharged into the housing space K, and then directly discharged from the pressure relief port V through the pressure relief valve to the outside of the housing space K, thus achieving pressure relief of the cell 201. In this way, the battery system in this application does not require an additional pressure relief channel in the height direction, the overall height of the battery system is smaller, and the battery system can include multiple battery modules 200 placed horizontally within the housing space K. The energy density of the battery system is also higher.

[0053] In summary, this application provides a battery system comprising a housing and multiple battery modules. The battery modules are horizontally placed within the housing's containment space. A pressure relief port and a pressure relief valve are provided on the outer surface of the frame within the housing. When a cell in a battery module is depressurized, the high-temperature gas emitted by the cell can be directly discharged into the containment space and then directly discharged from the pressure relief port through the pressure relief valve to the outside of the containment space, thus achieving cell depressurization. Therefore, the battery system in this application does not require an additional pressure relief channel in the height direction, resulting in a smaller overall height. Furthermore, the battery system can include multiple horizontally placed battery modules within the containment space, and the energy density of the battery system is also high.

[0054] Optional, please refer to Figure 5 and Figure 6 , Figure 5 This is a partial structural schematic diagram of a battery system provided in an embodiment of this application. Figure 6This is a schematic diagram of a battery module provided in an embodiment of this application. Multiple battery cells 201 in the same battery module 200 can be arranged in at least two rows along the height direction of the frame 100. Multiple battery cells 201 in the same row of cells in the battery module 200 can be arranged in a second direction Y. Here, the second direction Y can be perpendicular to the first direction X and also perpendicular to the height direction of the frame 100.

[0055] The frame 101 in the housing 100 may include two first side frames 1011 disposed opposite each other in the second direction Y, and two second side frames 1012 disposed opposite each other in the first direction X, with the ends of the first side frames 1011 and the second side frames 1012 connected. Thus, the two first side frames 1011 and the two second side frames 1012 can enclose a space. After the two first side frames 1011 and the two second side frames 1012 are connected to the first cover plate 102 and the second cover plate 103 on both sides in the height direction of the frame 100, the two first side frames 1011 and the two second side frames 1012 can form an accommodating space K. Furthermore, sealing rings can be provided between the frame 101 and the first cover plate 102, and between the frame 101 and the second cover plate 102, to ensure the sealing of the accommodating space K, thereby ensuring the service life of the battery module 200 located within the accommodating space K.

[0056] Optionally, the pressure relief port V on the frame 101 can be located on either of the two first side frames 1011 of the frame 101, and the pressure relief port V can penetrate through the first side frame 1011.

[0057] Optional, such as Figure 6 As shown, the explosion-proof valve A of the cell 201 in the battery module 200 is located at one end of the cell 201 in the first direction X. The ends of the cells 201 in the same battery module 200 with the explosion-proof valve A face the same direction. The number of pressure relief ports V on the first frame 1011 of the housing 100 can be multiple, and one pressure relief port V can correspond to one or two battery modules 200. Each pressure relief port V is located on the first frame 1011 near the side where multiple explosion-proof valves A are distributed in the corresponding battery module 200.

[0058] In this way, when the cell 201 in the battery module 200 is depressurized, the high-temperature gas discharged from the explosion-proof valve A can enter the containment space K and then be discharged from the corresponding pressure relief port V through the pressure relief valve to the outside of the containment space K, thereby realizing the pressure relief of the cell 201.

[0059] Optionally, the interior of the first frame 1011 in the frame 100 may have a connecting channel communicating with multiple pressure relief ports V, and the extending direction of the connecting channel may be parallel to the extending direction of the first frame 1011. Here, when the cell 201 in the battery module 200 is depressurized, the high-temperature gas discharged from the cell 201 into the containment space K can move through the connecting channel to the corresponding pressure relief port V, and then be discharged out of the containment space K through the pressure relief valve at the pressure relief port V.

[0060] It should be noted that when the cells in the battery module 200 are depressurized, the high-temperature gas discharged from the cell 201 through the explosion-proof valve may carry fixed substances, which could cause blockage of the pressure relief port V. In this application, the first frame 101, which provides multiple pressure relief ports V, has a connecting channel inside, and all the pressure relief ports V are connected to the connecting channel. Thus, when the cell 201 in the battery module 200 is depressurized, if the pressure relief port V corresponding to that battery module 201 is blocked, the high-temperature gas discharged from the cell 201 can move within the connecting channel of the first frame 1011 to an unblocked pressure relief port V, and then be discharged outside the containment space K through the pressure relief valve at that pressure relief port V. This improves the reliability of the pressure relief function of the battery system.

[0061] Optional, such as Figure 7 As shown, Figure 7 This is a top view of a partial structure of a battery system provided in an embodiment of this application. Multiple battery modules 200 in the battery system can be arranged along a first direction X. The interior of the first frame 100 of the housing 100 has multiple pressure relief channels P arranged along the first direction X. The multiple pressure relief channels P within the frame 100 can correspond to one or two battery modules 200, and each pressure relief channel P can be located on one side of a plurality of explosion-proof valves A distributed in the corresponding battery module 200.

[0062] It should be noted that each pressure relief channel P corresponds to a pressure relief port V at its end and is connected to the corresponding pressure relief port V. In this way, when the cell 201 in the battery module 200 is depressurized, the high-temperature gas discharged from the cell 201 through the explosion-proof valve A can move through the corresponding pressure relief channel P to the corresponding pressure relief port V, and then be discharged outside the containment space K through the pressure relief valve at the pressure relief port V, thereby achieving pressure relief.

[0063] Optional, such as Figure 8 As shown, Figure 8 This is a top view of a partial structure of another battery system provided in this application embodiment. The multiple pressure relief channels P in the frame 101 may include: two first pressure relief channels P1, and at least one second pressure relief channel P2 located between the two first pressure relief channels P1.

[0064] The two first pressure relief channels P1 inside the frame 101 can correspond to two battery modules 200 located at the edge of the multiple battery modules 200 respectively, and each first pressure relief channel P1 is located on one side of the corresponding battery module 200 where multiple explosion-proof valves A are distributed.

[0065] In this way, when the cells 201 of the two battery modules 200 located at the edge are depressurized, the high-temperature gas discharged from the cells 201 can move to the corresponding depressurization port V through the first depressurization channel P1, and then be discharged to the outside of the accommodating space K through the depressurization valve at the depressurization port V.

[0066] A second pressure relief channel P2 of the frame 101 can correspond to two battery modules 200 located in the middle and arranged adjacently among the multiple battery modules 200. The two battery modules 200 corresponding to a second pressure relief channel P2 are arranged face to face on one side of the explosion-proof valve A, and the second pressure relief channel P2 can be located between the two battery modules 200.

[0067] In this way, when the cells 201 of the two adjacent battery modules 200 located in the middle are depressurized, the high-temperature gas discharged from the cells 201 in the two battery modules 200 can move to the corresponding depressurization port V through a corresponding second depressurization channel P2, and then be discharged to the outside of the accommodating space K through the depressurization valve at the depressurization port V.

[0068] Optional, such as Figure 9 As shown, Figure 9 This is a partial structural diagram of a battery system provided in an embodiment of this application. The housing 100 of the battery system may further include: two first partitions 1013 disposed inside the frame 101. The two first partitions 1013 of the frame 100 may correspond to two battery modules 200 located at the edge positions of the plurality of battery modules 200 respectively. The interior of each first partition 1013 may have a first pressure relief channel P1. The side of each first partition 1013 near the corresponding battery module 200 in the first direction X may have a first mounting port communicating with the first pressure relief channel P1. The side of the battery module 200 where the explosion-proof valve A is disposed may be connected to the first partition 1013 at the first mounting port.

[0069] In this way, under the action of the first partition 1013, when the cell 201 of the battery module 200 corresponding to the first partition 1013 is depressurized, the high-temperature gas discharged from the cell 201 will only enter the first depressurization channel P1, and then be discharged through the depressurization valve at the depressurization port V, instead of being sprayed randomly to other positions in the accommodating space K, which would affect the cells 201 of other battery modules 200, thus improving the depressurization safety of the battery system.

[0070] Optional, such as Figure 9As shown, the battery system housing 100 may further include at least one second partition 1014 disposed inside the frame 101. Each second partition 1014 may correspond to two battery modules 200 located at the middle position and arranged adjacently among the plurality of battery modules 200. The interior of the second partition 1014 may have a second pressure relief channel P2, and the second partition 1014 may have two second mounting ports communicating with the second pressure relief channel P2. The two second mounting ports may be located on opposite sides of the second partition 1014 in the first direction X. The side of the battery module 200 where the explosion-proof valve A is disposed may be connected to the second partition 1014 at the second mounting port.

[0071] In this way, under the action of the second partition 1014, when the cell 201 of the battery module 200 corresponding to the second partition 1014 is depressurized, the high-temperature gas discharged from the cell 201 will only enter the first depressurization channel P1, and then be discharged through the depressurization valve at the depressurization port V, instead of being sprayed randomly to other positions in the accommodating space K, which would affect the cells 201 of other battery modules 200, thus improving the depressurization safety of the battery system.

[0072] Optionally, at least a portion of at least one of the first partitions 1013 inside the frame 101 may be reused with the second frame 1014 as the same structure.

[0073] It should be noted that, as Figure 10 As shown, Figure 10 This is an exploded view of a battery module provided in an embodiment of this application. The battery module 200 may further include a tray 202, which may have multiple through holes S. Each through hole S in the battery module 200 corresponds one-to-one with a plurality of battery cells 201. The diameter of the battery cell 201 in the battery module 200 may be larger than the diameter of the through hole S in the tray 202, and the diameter of the explosion-proof valve A of the battery cell 201 may be smaller than the diameter of the through hole S in the tray 202. Thus, the end of the battery cell 201 can abut against the tray 202, the tray 202 can support the plurality of battery cells 201, and the explosion-proof valve A of the battery cell 201 can be exposed through the through hole S. When the battery cell 201 is depressurized through the explosion-proof valve A, the high-temperature gas discharged from the battery cell 201 can be discharged into the corresponding pressure relief channel through the through hole.

[0074] And such as Figure 10As shown, the battery module 200 may further include a protective paper layer 203. The protective paper layer 203 may be located on the side of the tray 202 opposite to the multiple battery cells 201, and the protective paper layer 203 may cover multiple through holes S. When one battery cell 201 in the battery module 200 is depressurized, the high-temperature gas discharged from the battery cell 201 through the explosion-proof valve A can break through the protective paper layer 203 and be discharged into the corresponding depressurization channel P. The protective paper layer 203 can also protect other battery cells 201 to prevent the discharged high-temperature gas from affecting the gas cell 201, thereby causing the entire battery module 200 to fail.

[0075] like Figure 9 , Figure 11 and Figure 12 As shown, Figure 11 This is a partial structural schematic diagram of another battery system provided in an embodiment of this application. Figure 12 This is a partial structural diagram of a frame provided in an embodiment of the present application. In the two first partitions 1013 of the frame 101, at least a portion of one of the first partitions 1013 can be reused with the second frame 1014.

[0076] Specifically, the first partition 1013 may include a portion of the second frame 1012, a first auxiliary cover 10131, and two first support portions 10132. The tray 202 in the battery module 200 corresponding to the first partition 1013 may be disposed opposite to the second frame 1012 in the first direction X. The two first support portions 10132 in the first partition 1013 may be located near both ends of the second frame 1012 in the second direction Y. The first auxiliary cover 10131 in the first partition 1013 may be located on the side of the frame 101 facing the first cover 102, along with the two first support portions 10132 and the tray 202. Thus, the first auxiliary cover 10131, the portion of the second frame 1012, the tray 202, the second cover 103, and the two first support portions 10132 can form a first pressure relief channel P1. The first auxiliary cover plate 10131, the second cover plate 103, and the two first support portions 10132 can form a first mounting opening on the side of the battery module 200 in the first direction X. The tray 202 in the battery module 200 can be connected to the first partition portion 1013 at the first mounting opening.

[0077] like Figure 9 , Figure 11 and Figure 12As shown, in the frame 101, one of the two first partition portions 1013 may include a first partition 10133, a second auxiliary cover 10134, and two second support portions 10135. The first partition 10133 in the first partition portion 1013 may be located within the accommodating space K and may be located between the two second side frames 1012 in the first direction X. The tray 202 in the battery module 200 corresponding to the first partition portion 1013 may be disposed opposite to the first partition 10133 in the first direction X. The two second support portions 10135 in the first partition portion 1013 may be located at both ends of the first partition 10133 in the second direction Y. The second auxiliary cover 10134 in the first partition portion 1013 may be located on the side of the first partition 10133, the tray 202, and the two second support portions 10135 facing the first cover 102 in the height direction of the frame 101. In this way, the first partition 10133, the tray 202, the second auxiliary cover 10134, and the second cover 103 can form a first pressure relief channel P1. The second auxiliary cover 10134, the second cover 103, and the two second support portions 10135 can form a first mounting opening on the side facing the battery module 200 in the first direction X. The tray 202 in the battery module 200 can be connected to the first partition portion 1013 at the first mounting opening.

[0078] like Figure 9 , Figure 11 and Figure 12 As shown, in the second partition 1014 of the frame 101, the second partition 1014 may include a third auxiliary cover 10141 and two third support portions 10142. Two trays 202 in the two battery modules 200 corresponding to the second partition 1014 are arranged opposite each other in the first direction X. The two third support portions 10142 in the second partition 1014 may be located at both ends of the two trays 202 in the second direction Y. The third auxiliary cover 10141 in the second partition 1014 may be located on the side of the two trays 202 and the two third support portions 10142 facing the first cover 102 in the height direction of the frame 101. Thus, the third auxiliary cover 10141, the second cover 103, the two trays 202, and the two third support portions 10142 can form a second pressure relief channel P2. The third auxiliary cover plate 10141 and the two third support portions 10142 are located on both sides in the first direction X, and can form two second mounting openings with the second cover plate 103 respectively. The two trays 202 in the two battery modules 200 corresponding to the second partition portion 1014 can be connected to the second partition portion 1014 at the two second mounting openings respectively.

[0079] Optional, such as Figure 8 , Figure 9 and Figure 12 As shown, the housing 100 may further include an auxiliary baffle 104 disposed inside the second pressure relief channel P2, wherein the overall extension direction of the auxiliary baffle 104 may be parallel to the extension direction of the second pressure relief channel P2.

[0080] Here, the auxiliary baffle 104 can be located in the first direction X, between the two trays 202 of the two battery modules 200 corresponding to the second pressure relief channel P2. In this way, when the cell 201 in either of the two second battery modules 200 is depressurized, the high-temperature gas emitted by the cell 201 can be blocked by the auxiliary baffle 104, so as to prevent the high-temperature gas from being directly sprayed onto the opposite battery module, thereby improving the reliability of the battery system pressure relief.

[0081] Optional, such as Figure 13 As shown, Figure 13 This is a top view of a housing without a first cover, as provided in this application embodiment. The auxiliary baffle 104 in the housing 100 may include a plurality of first sub-baffles 1043 and a plurality of second sub-baffles 1044 arranged alternately in the second direction Y. Adjacent first sub-baffles 1043 and second sub-baffles 1044 in the auxiliary baffle 104 overlap, and are spaced apart in the first direction X. That is, there are gaps between adjacent first sub-baffles 1043 and second sub-baffles 1044. Thus, the channel between the tray 202 of one of the two battery modules 200 and the auxiliary baffle 104 is connected to the channel between the tray 202 and the auxiliary baffle 104 of the other battery module 200. In this way, while ensuring that the distance between the two trays 202 of the two battery modules 200 is small, the pressure relief space of the second pressure relief channel P2 can also be large.

[0082] It should be noted that the first partition 10133 located within the accommodating space K can divide the accommodating space K into a first sub-accommodating space K1 and a second sub-accommodating space K2. The first sub-accommodating space K1 and the second sub-accommodating space K2 can be distributed on both sides of the first partition 10133 in the first direction X, and the first sub-accommodating space K1 can be connected to the second sub-accommodating space K2. Multiple battery modules 200 in the battery system can be located within the first sub-accommodating space K1. High-voltage copper wires, low-voltage wiring harnesses, and water-cooling pipes can be fixed within the second sub-accommodating space K2.

[0083] In summary, this application provides a battery system comprising a housing and multiple battery modules. The battery modules are horizontally placed within the housing's containment space. A pressure relief port and a pressure relief valve are provided on the outer surface of the frame within the housing. When a cell in a battery module is depressurized, the high-temperature gas emitted by the cell can be directly discharged into the containment space and then directly discharged from the pressure relief port through the pressure relief valve to the outside of the containment space, thus achieving cell depressurization. Therefore, the battery system in this application does not require an additional pressure relief channel in the height direction, resulting in a smaller overall height. Furthermore, the battery system can include multiple horizontally placed battery modules within the containment space, and the energy density of the battery system is also high.

[0084] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "multiple" refers to two or more unless otherwise expressly defined.

[0085] The above description is merely an optional embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery system, characterized in that, include: The enclosure (100) and multiple battery modules (200); The box (100) includes: a frame (101), a first cover plate (102) and a second cover plate (103); the first cover plate (102) and the second cover plate (103) are respectively connected to the frame (101) on opposite sides in the height direction, and the frame (101), the first cover plate (102) and the second cover plate (103) form an accommodating space (K); The plurality of battery modules (200) are located within the accommodating space (K), and each battery module (200) includes a plurality of battery cells (201). The axial direction of the battery cells (201) is parallel to a first direction (X), and the first direction (X) is perpendicular to the height direction of the frame (101). The outer side of the frame (101) has a pressure relief port (V) that penetrates the frame (101), the pressure relief port (V) is connected to the accommodating space (K), and a pressure relief valve is provided at the position of the pressure relief port (V).

2. The battery system according to claim 1, characterized in that, The plurality of cells (201) in the same battery module (200) are arranged in at least two rows in the height direction of the frame (101), and the plurality of cells (201) in the same row are arranged in a second direction (Y), which is perpendicular to the first direction (X) and perpendicular to the height direction of the frame (101); The frame (101) includes two first side frames (1011) arranged opposite to each other in the second direction (Y), and two second side frames (1012) arranged opposite to each other in the first direction (X), wherein the ends of the first side frames (1011) are connected to the ends of the second side frames (1012). The pressure relief port (V) is located on either of the two first frame frames (1011) and extends through the first frame frame (1011) along the second direction (Y).

3. The battery system according to claim 2, characterized in that, The battery cell (201) has an explosion-proof valve (A) at one end in the first direction (X), and the ends of the explosion-proof valves (A) in the plurality of battery cells (201) in the same battery module (200) are oriented in the same direction; The first frame (1011) has multiple pressure relief ports (V), and one pressure relief port (V) corresponds to one or two battery modules (200); Each of the pressure relief ports (V) is located on the first frame (1011) at a position close to one side of the corresponding battery module (200) where multiple explosion-proof valves (A) are distributed.

4. The battery system according to claim 3, characterized in that, The interior of the first frame (1011) has a communication channel communicating with the plurality of pressure relief ports (V), the extension direction of the communication channel being parallel to the extension direction of the first frame (1011).

5. The battery system according to claim 3 or 4, characterized in that, The plurality of battery modules (200) are arranged along the first direction (X), and the interior of the frame (101) has a plurality of pressure relief channels (P) arranged along the first direction (X); the plurality of pressure relief channels (P) are connected one-to-one with the plurality of pressure relief ports (V) provided on the first frame (1011); and one pressure relief channel (P) corresponds to one or two battery modules (200), and each pressure relief channel (P) is located on one side of the plurality of explosion-proof valves (A) distributed in the corresponding battery module (200).

6. The battery system according to claim 5, characterized in that, The plurality of pressure relief channels (P) include: two first pressure relief channels (P1), and at least one second pressure relief channel (P2) located between the two first pressure relief channels (P1); The two first pressure relief channels (P1) correspond to two battery modules (200) located at the edge of the plurality of battery modules (200), and each first pressure relief channel (P1) is located on one side of the plurality of explosion-proof valves (A) distributed in the corresponding battery module (200); One of the second pressure relief channels (P2) corresponds to two battery modules (200) located in the middle and arranged adjacently among the plurality of battery modules (200). The two battery modules (200) corresponding to one of the second pressure relief channels (P2) are arranged face to face on one side of the explosion-proof valve (A), and the second pressure relief channel (P2) is located between the two corresponding battery modules (200).

7. The battery system according to claim 6, characterized in that, The housing (100) further includes two first partitions (1013) disposed inside the frame (101), the two first partitions (1013) respectively corresponding to two battery modules (200) located at the edge position among the plurality of battery modules (200), each first partition (1013) having a first pressure relief channel (P1) inside, each first partition (1013) having a first mounting port communicating with the first pressure relief channel (P1) on the side of the first direction (X) close to the corresponding battery module (200), and the side of the battery module (200) where the explosion-proof valve (A) is disposed is connected to the first partition (1013) at the first mounting port.

8. The battery system according to claim 7, characterized in that, At least a portion of at least one of the first partition (1013) is reused with the second frame (1012) as the same structure.

9. The battery system according to any one of claims 6-8, characterized in that, The housing (100) further includes at least one second partition (1014) disposed inside the frame (101). Each second partition (1014) corresponds to two battery modules (200) located in the middle and arranged adjacently among the plurality of battery modules (200). The second partition (1014) has a second pressure relief channel (P2) inside and has two second mounting ports communicating with the second pressure relief channel (P2). The two second mounting ports are located on both sides of the second partition (1014) in the first direction (X). The side of the battery module (200) where the explosion-proof valve (A) is disposed is connected to the second partition (1014) at the second mounting port.

10. The battery system according to claim 9, characterized in that, The housing (100) further includes an auxiliary baffle (104) disposed inside the second pressure relief channel (P2), wherein the overall extension direction of the auxiliary baffle (104) is parallel to the extension direction of the second pressure relief channel (P2).

11. The battery system according to claim 10, characterized in that, The auxiliary baffle (104) includes a plurality of first sub-baffles (1041) and a plurality of second sub-baffles (1042) arranged alternately in the second direction (Y), wherein the adjacent first sub-baffles (1041) and second sub-baffles (1042) overlap, and the adjacent first sub-baffles (1041) and second sub-baffles (1042) are spaced apart in the first direction (X).

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