Cylindrical battery cell side-lying type battery module and battery system

Abstract

The utility model discloses a cylindrical cell side lying type battery module and battery system, including: intermediate frame, intermediate frame including main frame body and separator plate, the main frame body is formed by vertical connection of two horizontally arranged first frame and two vertically arranged first frame, the separator plate is located in the main frame body and is vertically connected with four first frame, the separator plate is located in the main frame body and is vertically connected with the four first frame, and the separator plate is located in the main frame body and is vertically connected with the four first frame. The two sides of the partition plate and the main frame body form a mounting groove respectively; two sub battery modules, wherein each sub battery module comprises a plurality of side lying type cylindrical battery cells; and each sub-battery module is mounted in one mounting groove through one tray, and the pressure release valve of the cylindrical battery cell is opposite to the partition plate. According to the utility model, the two sub-battery modules consisting of the plurality of side-lying type cylindrical battery cells are respectively arranged in the mounting grooves on the two sides of the middle frame, so that the space utilization rate of the battery system in the vertical height direction can be effectively improved, and the battery system is suitable for a new energy automobile with a relatively high chassis.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy, in particular to a cylindrical battery cell side-lying battery module and a battery system including the cylindrical battery cell side-lying battery module. Background Art

[0002] At present, the battery energy of battery systems applied to new energy vehicles such as hybrid vehicles is mostly between 5 kWh and 20 kWh. The number of cylindrical battery cells is much less than that of battery systems for pure electric vehicles, and most of the cylindrical battery cells adopt a vertical design. However, in some application scenarios of hybrid battery systems, such as SUVs, MPVs, and off-road vehicles, due to the relatively high chassis of the vehicle, the total height of the battery pack is also relatively high. If the cylindrical battery cells adopt a vertical design, the space utilization rate in the vertical direction will be low. For the battery systems of other pure electric vehicles with relatively high chassis, there are also similar technical problems.

[0003] Therefore, there is an urgent need to design a battery system suitable for new energy vehicles with relatively high chassis. Summary of the Utility Model

[0004] The purpose of the embodiments of the utility model is to provide a cylindrical battery cell side-lying battery module and a battery system. The cylindrical battery cells in the cylindrical battery cell side-lying battery module adopt a side-lying design, which can effectively improve the space utilization rate in the vertical height direction of the battery system. The battery system of the utility model is suitable for new energy vehicles with relatively high chassis.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions:

[0006] On the one hand, a cylindrical battery cell side-lying battery module is provided, which includes an intermediate frame, two sub-battery modules, and two trays.

[0007] Among them, the intermediate frame includes a main frame body and a partition. The main frame body is vertically connected by two horizontally arranged first side frames and two vertically arranged first side frames. The partition is located inside the main frame body and is vertically connected to the four first side frames. And both sides of the partition form an installation groove with the main frame body respectively;

[0008] Each sub-battery module includes a plurality of side-lying cylindrical battery cells;

[0009] Each sub-battery module is installed in one of the installation grooves through one of the trays.

[0010] As a further solution for the side-lying cylindrical battery cell module, the tray includes a tray body. The tray body is provided with a plurality of first pressure relief holes along its thickness direction. The side-lying cylindrical battery cells are in clearance fit with the tray body, and the side-lying cylindrical battery cells are adhesively bonded to the tray body by structural adhesive. The pressure relief valves of the side-lying cylindrical battery cells are aligned with the partition plate and the first pressure relief holes. The tray bodies of the two trays are spaced apart from the partition plate to form two independent pressure relief cavities. Each vertically arranged first frame is penetrated by two first pressure relief openings along its thickness direction. The two first pressure relief openings are spaced apart horizontally, and each first pressure relief opening is communicated with one of the pressure relief cavities.

[0011] As a further solution for the side-lying cylindrical battery cell module, it further includes two connecting seats. One connecting seat is installed on the outer side of each vertically arranged first frame. The connecting seat is provided with a second pressure relief opening, a third pressure relief opening, and a pressure relief channel located inside the connecting seat and communicating with the second pressure relief opening and the third pressure relief opening respectively. The second pressure relief opening is communicated with the first pressure relief opening.

[0012] As a further solution for the side-lying cylindrical battery cell module, the second pressure relief opening is located on the side of the connecting seat adjacent to the first frame, and the number of the second pressure relief openings is two. Each second pressure relief opening is aligned with one of the first pressure relief openings.

[0013] As a further solution for the side-lying cylindrical battery cell module, the number of the pressure relief channels is two. Each pressure relief channel is communicated with one of the second pressure relief openings. The third pressure relief opening is located on the lower side of the connecting seat, and the third pressure relief opening is communicated with the two pressure relief channels at the same time.

[0014] As a further solution for the side-lying cylindrical battery cell module, the first frame has a hollow structure formed by an inner plate and an outer plate spaced apart. The partition plate penetrates the inner plate of the first frame and is connected to the outer plate of the first frame. The hollow structure of the first frame is divided into two sub-hollow structures by the partition plate. Each first pressure relief opening is communicated with one sub-hollow structure of the first frame.

[0015] As a further solution for the side-lying cylindrical battery cell module, the tray further includes a second frame surrounding the periphery of the tray body. The second frame is located on the side of the tray body close to the side-lying cylindrical battery cells. One end of the second frame far from the tray body extends outward with a connecting plate. The connecting plate is located on one side of the first frame along its width direction. The connecting plate is fixedly connected to the first frame by a fastener. The width of the second frame is smaller than the depth of the installation groove.

[0016] As a further solution for the cylindrical battery cell side-lying battery module, the connecting plate includes two first connecting plates with lengths extending in the horizontal direction and two second connecting plates with lengths extending in the vertical direction. The two ends of the two first connecting plates are respectively connected to the two ends of the two second connecting plates. The second connecting plate is fixedly connected to the first frame through the fastener. The second connecting plate has a plurality of hanging grooves recessed towards the side away from the first frame.

[0017] On the other hand, a battery system is provided, which includes a box body. The box body includes a bottom guard plate and box side beams located on one side of the bottom guard plate and fixedly connected to the periphery of the bottom guard plate. The box side beams are of a hollow structure. An accommodation groove is formed between the box side beams and the bottom guard plate. The battery system further includes a plurality of cylindrical battery cell side-lying battery modules arranged side by side and spaced in the accommodation groove. An installation step is annularly provided on the inner circumference of the box side beam. The middle frame of the cylindrical battery cell side-lying battery module is fixedly connected to the installation step through a connector.

[0018] As a further solution for the battery system, the connector includes a connection seat. A pressure relief channel is provided in the connection seat. A third pressure relief port communicating with the pressure relief channel is opened on one side of the connection seat close to the installation step or the box side beam. The installation step is of a hollow structure, and this hollow structure communicates with the hollow structure of the box side beam. A fourth pressure relief port communicating with the third pressure relief port is opened on one side of the installation step or the box side beam close to the connection seat.

[0019] Beneficial effects: In the present utility model, the cylindrical battery cells of the sub-battery modules are designed to be side-lying, and the two sub-battery modules are respectively installed in the installation grooves on both sides of the middle frame through a tray, so that the cylindrical battery cell side-lying battery module can be applied to a battery system with a relatively high height, and the space utilization rate of the battery system in the vertical height direction is fully utilized.

[0020] In the present utility model, the middle frame is separated into two installation grooves by a partition plate, and the pressure relief valves of the side-lying cylindrical battery cells are aligned with the partition plate. The interval design between the tray body and the partition plate can enable the sub-battery modules on both sides of the middle frame to respectively have independent pressure relief cavities, and a first pressure relief port is opened on the first frame of the middle frame for each pressure relief cavity. When a thermal runaway occurs, it can prevent the side-lying cylindrical battery cells of one side of the sub-battery module from affecting the sub-battery module on the other side when a thermal runaway occurs, thereby reducing the risk of thermal propagation.

[0021] In the present utility model, the cylindrical battery cell side-lying type battery module is installed in the box body through the connecting seat on the outer side of the first frame. The present utility model ingeniously designs the structure of the connecting seat, and a second pressure relief port communicating with the first pressure relief port on the first frame, a third pressure relief port communicating with the fourth pressure relief port on the box body, and a pressure relief channel communicating the second pressure relief port and the third pressure relief port are opened on the connecting seat, so as to form two independent pressure relief paths, effectively ensuring the thermal safety of the battery system. Brief Description of the Drawings

[0022] The present utility model will be further described in detail below with reference to the drawings and embodiments.

[0023] Figure 1 It is a schematic structural diagram of the cylindrical battery cell side-lying type battery module according to the embodiment of the present utility model.

[0024] Figure 2 It is an exploded schematic diagram of the cylindrical battery cell side-lying type battery module according to the embodiment of the present utility model.

[0025] Figure 3 It is a side view schematic diagram of the cylindrical battery cell side-lying type battery module (removing one first frame of the sub-battery module) according to the embodiment of the present utility model.

[0026] Figure 4 It is Figure 3 a partial enlarged schematic diagram of part A in

[0027] Figure 5 It is a schematic structural diagram of the connecting seat according to the embodiment of the present utility model.

[0028] Figure 6 It is a schematic structural diagram of the connecting seat (removing the U-shaped end plate) according to the embodiment of the present utility model.

[0029] Figure 7 It is a schematic structural diagram of the battery system (after the cover plate is opened) according to the embodiment of the present utility model.

[0030] Figure 8 It is a top view schematic diagram of the box body of the battery system according to the embodiment of the present utility model.

[0031] In the figure:

[0032] 1. Intermediate frame; 11. Partition; 12. First frame; 13. Installation groove; 14. Pressure relief cavity; 15. First pressure relief port; 2. Sub-battery module; 3. Tray; 31. Tray body; 32. First pressure relief hole; 33. Second frame; 34. Connecting plate; 341. First connecting plate; 342. Second connecting plate; 343. Hanging groove; 4. Structural adhesive; 5. Connecting seat; 51. Second pressure relief port; 52. Third pressure relief port; 53. Pressure relief channel; 54. U-shaped end plate; 6. Insulating bracket; 61. Through hole;

[0033] 100, Box body; 110, Bottom protection plate; 120, Box side beam; 130, Accommodation groove; 140, Installation step; 150, Fourth pressure relief port; 160, Cover plate; 200, Cylindrical battery cell side-lying battery module. Detailed implementation manner

[0034] To make the technical problems solved by the present utility model, the technical solutions adopted and the achieved technical effects clearer, the technical solutions of the embodiments of the present utility model will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present utility model.

[0035] As Figure 1 and Figure 2 shown, this embodiment provides a cylindrical battery cell side-lying battery module 200, which includes an intermediate frame 1, two sub-battery modules 2 and two trays 3.

[0036] Among them, the intermediate frame 1 includes a main frame body and a partition 11. The main frame body is vertically connected by two horizontally arranged first side frames 12 and two vertically arranged first side frames 12. The partition 11 is located inside the main frame body and is vertically connected to the four first side frames 12. And both sides of the partition 11 respectively form an installation groove 13 with the main frame body.

[0037] Two sub-battery modules 2, each sub-battery module 2 includes a plurality of side-lying cylindrical battery cells;

[0038] Each sub-battery module 2 is installed in one of the installation grooves 13 through a tray 3.

[0039] Among them, the term "side-lying" means that the cylindrical battery cell is in a horizontal state.

[0040] In this embodiment, the partition 11 is used to divide the main frame body into two installation grooves 13 arranged back to back. Each installation groove 13 is installed with a side-lying sub-battery module 2. Compared with the existing vertical cylindrical battery cell design, when the total height of the battery pack is relatively high, the vertical height space utilization rate can be effectively improved.

[0041] In this embodiment, the battery pack and the battery system have the same meaning.

[0042] In this embodiment, the two sub-battery modules 2 are respectively installed in the installation grooves 13 on both sides of the partition 11 through the trays 3, which plays a certain protective role for the intermediate frame 1.

[0043] Further, the tray 3 includes a tray body 31. A plurality of first pressure relief holes 32 are formed in the tray body 31 along its thickness direction. The side-lying cylindrical battery cells are in clearance fit with the tray body 31, and the side-lying cylindrical battery cells are adhesively bonded to the tray body 31 by structural adhesive 4. The pressure relief valves of the side-lying cylindrical battery cells are aligned with the partition 11 and the first pressure relief holes 32. There is a gap between the tray bodies 31 of the two trays 3 and the partition 11, forming two independent pressure relief chambers 14. Each vertically arranged first frame 12 has two first pressure relief openings 15 penetrating along its thickness direction. The two first pressure relief openings 15 are spaced apart horizontally, and each first pressure relief opening 15 communicates with one of the pressure relief chambers 14.

[0044] Reference Figure 3 and Figure 4 , there is a certain gap between the tray body 31 and the partition 11, thus forming the pressure relief chamber 14, so that the two sub-battery modules 2 on the intermediate frame 1 respectively have independent pressure relief chambers 14, and independent first pressure relief openings 15 are respectively formed on the first frame 12 corresponding to each pressure relief chamber 14. When a certain sub-battery module 2 undergoes thermal runaway, the pressure relief gas can directly enter the pressure relief chamber 14 corresponding to the sub-battery module 2 and be released through the first pressure relief opening 15. Due to the separation of the partition 11, it will not spread into the pressure relief chamber 14 on the other side of the partition 11 to affect the sub-battery module 2 on the other side, thereby reducing the risk of thermal propagation.

[0045] Specifically, two first pressure relief openings 15 are respectively provided on the two vertically arranged first frames 12 along the horizontal direction. When the sub-battery module 2 on one side undergoes thermal runaway, the pressure relief gas can be released from the two first pressure relief openings 15 of the pressure relief chamber 14, so as to quickly reduce the gas pressure in the pressure relief chamber 14.

[0046] In this embodiment, the structural adhesive 4 refers to the shape after curing after fixing the side-lying cylindrical battery cells, which is formed by connecting a plurality of rings and is mainly used to fix the side-lying cylindrical battery cells to the first pressure relief holes 32 of the tray body 31.

[0047] Further, the tray 3 further includes a second frame 33 surrounding the periphery of the tray body 31. The second frame 33 is located on the side of the tray body 31 close to the side-lying cylindrical battery cells. One end of the second frame 33 away from the tray body 31 extends outward with a connecting plate 34. The connecting plate 34 is located on one side of the first frame 12 along its width direction. The connecting plate 34 is fixedly connected to the first frame 12 by fasteners. The width of the second frame 33 is smaller than the depth of the installation groove 13.

[0048] Among them, the distance between the tray body 31 and the partition 11 depends on the difference between the depth of the installation groove 13 and the width of the second frame 33. When the width of the second frame 33 is less than the depth of the installation groove 13, a certain gap can be formed between the tray body 31 and the partition 11, that is, a pressure relief cavity 14 is formed. After the connecting plate 34 is fixedly connected to the first frame 12 through fasteners, the capacity of the pressure relief cavity 14 can be maintained in a relatively stable state.

[0049] Further, the connecting plate 34 includes two first connecting plates 341 whose lengths extend in the horizontal direction and two second connecting plates 342 whose lengths extend in the vertical direction. The two ends of the two first connecting plates 341 are respectively connected to the two ends of the two second connecting plates 342. The second connecting plates 342 are fixedly connected to the first frame 12 through fasteners. The second connecting plates 342 are provided with a plurality of hanging grooves 343 recessed toward the side away from the first frame 12.

[0050] Optionally, the fasteners can be screws. The number of screws is three. Correspondingly, three mounting holes are respectively arranged at intervals on the second connecting plate 342 and the side of the first frame 12 close to the second connecting plate 342. The screws respectively pass through the mounting holes on the second connecting plate 342 and the connecting holes on the first frame 12 and are screwed and fixed, so as to realize the fixed installation of the tray 3 in the installation groove 13.

[0051] Optionally, the number of hanging grooves 343 on each second connecting plate 342 is two, and one hanging groove 343 is arranged between every two adjacent mounting holes. After the sub-battery module 2 is fixed on the tray 3, the tray 3 with the sub-battery module 2 installed can be hoisted into the installation groove 13 for installation and fixation through the hanging grooves 343. During installation, the intermediate frame 1 can be laid down to facilitate the hoisting of the tray 3 and the sub-battery module 2.

[0052] Further, in order to prevent the misinstallation of the sub-battery module 2, a guiding mark is further provided on the side of the second connecting plate 342 away from the first frame 12. Optionally, the guiding mark is an upward arrow. When the cylindrical battery cell side-lying battery module 200 is installed into the box body 100, the arrows on all the trays 3 point in the same direction.

[0053] Further, the cylindrical battery cell side-lying battery module 200 of this embodiment further includes two connecting seats 5. One connecting seat 5 is installed on the outer side of each vertically arranged first frame 12. Refer to Figure 5 and Figure 6 , the connecting seat 5 is provided with a second pressure relief port 51, a third pressure relief port 52, and a pressure relief channel 53 located inside the connecting seat 5 and communicating with the second pressure relief port 51 and the third pressure relief port 52 respectively. The second pressure relief port 51 is communicated with the first pressure relief port 15.

[0054] In this embodiment, the connection base 5 is installed on the outer side of the first frame 12. After the connection base 5 is connected to the inner side of the box body 100, the cylindrical battery cell side-lying battery module 200 can be fixed in the box body 100. In this embodiment, in combination with the positions of the pressure relief cavity 14 and the first pressure relief port 15, the structure of the connection base 5 is improved, that is, the connection base 5 is provided with a second pressure relief port 51, a third pressure relief port 52, and a pressure relief channel 53 for communicating the second pressure relief port 51 and the third pressure relief port 52. Thus, when a certain sub-battery module 2 has a thermal runaway, the pressure relief gas in the corresponding pressure relief cavity 14 can be led out and released in sequence through the first pressure relief port 15, the second pressure relief port 51, the pressure relief channel 53, and the third pressure relief port 52.

[0055] Specifically, the connection base 5 in this embodiment is fixedly welded to the first frame 12 of the intermediate frame 1.

[0056] Further, the second pressure relief port 51 is located on the side of the connection base 5 adjacent to the first frame 12, and the number of the second pressure relief ports 51 is two, and each second pressure relief port 51 faces one of the first pressure relief ports 15.

[0057] In this embodiment, a second pressure relief port 51 is provided on the connection base 5 for each first pressure relief port 15. When a certain sub-battery module 2 has a thermal runaway, the pressure relief gas in the corresponding pressure relief cavity 14 can be independently led out.

[0058] Furthermore, there are two independent pressure relief channels 53. Each pressure relief channel 53 is communicated with a second pressure relief port 51. The third pressure relief port 52 is located on the lower side of the connection base 5, and the third pressure relief port 52 is communicated with the two pressure relief channels 53 at the same time.

[0059] In this embodiment, the pressure relief channels 53 are also designed to be two independent ones, that is, one pressure relief channel 53 is designed for each second pressure relief port 51, which can further prevent thermal spread when the sub-battery module 2 has a thermal runaway.

[0060] Optionally, the first pressure relief port 15 and the second pressure relief port 51 have the same shape, which is an oblong hole similar to an ellipse; the connection base 5 is a hollow structure. The cross-sections of the two pressure relief channels 53 are similar to a U-shaped structure. One side of the two pressure relief channels 53 facing the second pressure relief port 51 is closed by a U-shaped end plate 54, and the lower side of the pressure relief channel 53 close to the U-shaped end plate 54 is communicated with the third pressure relief port 52 on the lower side of the connection base 5.

[0061] In this embodiment, the first frame 12 has a hollow structure formed by an inner plate and an outer plate spaced apart. The partition plate 11 penetrates through the inner plate of the first frame 12 and is connected to the outer plate of the first frame 12. The hollow structure of the first frame 12 is divided into two sub-hollow structures by the partition plate 11, and each first pressure relief port 15 is communicated with a sub-hollow structure of the first frame 12.

[0062] In this embodiment, the partition 11 is also a double-layer plate structure made of aluminum, and there is a certain gap between the double-layer plates.

[0063] When thermal runaway occurs in the sub-battery module 2 on one side, pressure relief gas is generated in the corresponding pressure relief cavity 14. The pressure relief gas can enter the sub-hollow structure of the corresponding first frame 12 through the first pressure relief port 15 and will not spread to the sub-hollow structure on the other side of the first frame 12, effectively reducing the impact on the first frame 12 and the sub-battery module 2 on the other side during thermal runaway.

[0064] In this embodiment, the outer plate of each first frame 12 is an integral structure, the number of inner plates is two, the four sides of the partition 11 are fixedly connected to the inner side of the outer plate of the first frame 12, and the two inner plates are respectively fixedly connected to both sides of the partition 11.

[0065] Furthermore, the cylindrical battery cell side-lying type battery module 200 of this embodiment further includes an insulating bracket 6. The insulating bracket 6 is installed in the tray 3 and faces the tray body 31. The insulating bracket 6 is provided with through holes 61 corresponding to the first pressure relief holes 32 in the thickness direction thereof. The side-lying cylindrical battery cells are inserted and matched with the through holes 61 and fixed by the structural adhesive 4.

[0066] In this embodiment, the tray 3 is made of aluminum, and the insulating bracket 6 is made of plastic.

[0067] Among them, the structural adhesive 4 is used to fixedly connect the insulating bracket 6, the side-lying cylindrical battery cells and the tray body 31. The insulating bracket 6 can be used to support the side-lying cylindrical battery cells and play an insulating role between the side-lying cylindrical battery cells and the tray 3.

[0068] Reference Figure 7 and Figure 8 and, this embodiment further provides a battery system, including a box body 100. The box body 100 includes a bottom guard plate 110 and a box side beam 120 located on one side of the bottom guard plate 110 and fixedly connected to the four sides of the bottom guard plate 110. The box side beam 120 is a hollow structure. A receiving groove 130 is formed between the box side beam 120 and the bottom guard plate 110. The battery system further includes a plurality of cylindrical battery cell side-lying type battery modules 200 arranged side by side and spaced in the receiving groove 130 as described in the above embodiments. An installation step 140 is provided around the inner circumference of the box side beam 120. The intermediate frame 1 of the cylindrical battery cell side-lying type battery module 200 is fixedly connected to the installation step 140 through a connecting member.

[0069] In this embodiment, three cylindrical cell side-lying battery modules 200 are installed side by side in the accommodation groove 130 of the box body 100. Of course, the number of the cylindrical cell side-lying battery modules 200 in this embodiment is only for illustration. In specific applications, the box body 100 and the intermediate frame 1 with corresponding dimensions can be designed according to actual needs and installation conditions to install an appropriate number of cylindrical cell side-lying battery modules 200.

[0070] In this embodiment, the length direction of the cylindrical cell side-lying battery module 200 is consistent with the width direction of the accommodation groove 130, and the width direction of the cylindrical cell side-lying battery module 200 and the length direction of the side-lying cylindrical cells are consistent with the length direction of the accommodation groove 130.

[0071] In this embodiment, a plurality of cylindrical cell side-lying battery modules 200 are installed in the accommodation groove 130 of the box body 100 to assemble a battery system. The battery system has a large battery capacity and can be applied to SUVs, MPVs and off-road vehicles with a relatively high chassis, including hybrid vehicles and pure electric vehicles. The total height of the battery packs of such vehicles is relatively high. Using the battery system of this embodiment can improve the space utilization rate in the vertical height direction.

[0072] Further, the connecting member includes a connecting seat 5. A pressure relief channel 53 is provided in the connecting seat 5. A third pressure relief port 52 communicating with the pressure relief channel 53 is opened on one side of the connecting seat 5 close to the mounting step 140 or the box side beam 120. The mounting step 140 is a hollow structure, and this hollow structure communicates with the hollow structure of the box side beam 120. A fourth pressure relief port 150 communicating with the third pressure relief port 52 is opened on one side of the mounting step 140 or the box side beam 120 close to the connecting seat 5.

[0073] Wherein, a second pressure relief port 51 communicating with the first pressure relief port 15 on the first frame 12 is further opened on one side of the connecting seat 5 close to the first frame 12, and the second pressure relief port 51 communicates with the pressure relief channel 53. In this embodiment, the pressure relief channel 53 in the connecting seat 5 is communicated with the hollow structure in the box side beam 120 through the third pressure relief port 52 and the fourth pressure relief port 150, so that the pressure relief gas when a certain sub-battery module 2 has a thermal runaway can be released into the box side beam 120 through the pressure relief channel 53 in the connecting seat 5.

[0074] Further, after the connecting seat 5 of the cylindrical cell side-lying battery module 200 is fixed to the mounting step 140 of the box body 100 by bolts, the gap between the box body 100 and the connecting seat 5 of the cylindrical cell side-lying battery module 200 is sealed and filled with sealant.

[0075] Furthermore, the housing 100 of this embodiment further includes a cover plate 160, and the cover plate 160 is fixedly connected to the cylindrical cell side-lying battery module 200 installed in the accommodation groove 130. Specifically, the cover plate 160 is fixedly connected to the middle frame 1 of the cylindrical cell side-lying battery module 200 by screws.

[0076] In this embodiment, the cylindrical cells of the cylindrical cell side-lying battery module 200 can be 46XX cylindrical cells or cylindrical cells of other models. The two sub-battery modules 2 on both sides of the cylindrical cell side-lying battery module 200 adopt independent pressure relief paths, ensuring thermal safety.

[0077] This embodiment provides a new conceptual design solution for the 46XX large cylindrical battery system.

[0078] The battery system of this embodiment is applicable not only to hybrid vehicles but also to pure electric vehicles, and is applicable to new energy vehicles with a relatively high chassis, such as SUVs, MPVs, and off-road vehicles.

Claims

1. A cylindrical battery cell side-lying battery module, characterized in that: include: An intermediate frame, the intermediate frame comprising a main frame and a partition, the main frame being formed by vertically connecting two horizontally arranged first frames and two vertically arranged first frames, the partition being located in the main frame and vertically connected to the four first frames, and both sides of the partition forming a mounting groove with the main frame respectively; Two sub-battery modules, each of which includes a plurality of side-lying cylindrical cells; Two trays, each of the sub-battery modules is installed in one of the installation slots through one of the trays.

2. The cylindrical battery cell side-lying battery module according to claim 1, characterized in that: The tray includes a tray body, and the tray body is provided with a plurality of first pressure relief holes along its thickness direction. The side-lying cylindrical battery cell is loosely matched with the tray body, and the side-lying cylindrical battery cell is glued to the tray body by structural adhesive, and the pressure relief valve of the side-lying cylindrical battery cell is opposite to the partition and the first pressure relief hole. The tray bodies and the partitions of the two trays are spaced apart to form two independent pressure relief chambers, and each vertically arranged first frame has two first pressure relief ports passing through it along its thickness direction, and the two first pressure relief ports are spaced apart in the horizontal direction, and each of the first pressure relief ports is connected to one of the pressure relief chambers.

3. The cylindrical battery cell side-lying battery module according to claim 2, characterized in that: It also includes two connecting seats, one of which is installed on the outer side of each vertically arranged first frame, and the connecting seat is provided with a second pressure relief port, a third pressure relief port, and a pressure relief channel located in the connecting seat and connected to the second pressure relief port and the third pressure relief port respectively, and the second pressure relief port is connected to the first pressure relief port.

4. The cylindrical battery cell side-lying battery module according to claim 3, characterized in that: The second pressure relief port is located at a side of the connecting base adjacent to the first frame, and the number of the second pressure relief ports is two, and each of the second pressure relief ports is directly opposite to one of the first pressure relief ports.

5. The cylindrical battery cell side-lying battery module according to claim 4, characterized in that: The number of the pressure relief channels is independent, each of the pressure relief channels is connected to one of the second pressure relief ports, the third pressure relief port is located at the lower side of the connecting seat, and the third pressure relief port is connected to two of the pressure relief channels at the same time.

6. The cylindrical battery cell side-lying battery module according to claim 3, characterized in that: The first frame has a hollow structure formed by an inner plate and an outer plate, the partition passes through the inner plate of the first frame and is connected to the outer plate of the first frame, the hollow structure of the first frame is divided into two sub-hollow structures by the partition, and each of the first pressure relief ports is connected to a sub-hollow structure of the first frame.

7. The cylindrical battery cell side-lying battery module according to any one of claims 2 to 6, characterized in that: The tray also includes a second frame surrounding the tray body, the second frame is located on a side of the tray body close to the side-lying cylindrical battery cell, and a connecting plate extends outward from an end of the second frame away from the tray body. The connecting plate is located on one side of the first frame along its width direction, and the connecting plate is fixedly connected to the first frame by fasteners. The width of the second frame is less than the depth of the mounting groove.

8. The cylindrical battery cell side-lying battery module according to claim 7, characterized in that: The connecting plate includes two first connecting plates extending in the horizontal direction and two second connecting plates extending in the vertical direction. The two ends of the two first connecting plates are respectively connected to the two ends of the two second connecting plates. The second connecting plates are fixedly connected to the first frame through the fasteners. The second connecting plates have a plurality of hanging grooves recessed toward a side away from the first frame.

9. A battery system, comprising a box body, the box body comprising a bottom guard plate and a box side beam located on one side of the bottom guard plate and fixedly connected to the periphery of the bottom guard plate, the box side beam being a hollow structure, and a receiving groove being formed between the box side beam and the bottom guard plate, characterized in that: It also includes a plurality of cylindrical cell side-lying battery modules as described in any one of claims 1 to 8, which are arranged side by side and spaced apart in the accommodating groove, the inner circumference of the box side beam is provided with a mounting step, and the middle frame of the cylindrical cell side-lying battery module is fixedly connected to the mounting step via a connecting piece.

10. The battery system according to claim 9, characterized in that: The connecting member includes a connecting seat, a pressure relief channel is provided in the connecting seat, a third pressure relief port connected to the pressure relief channel is opened on a side of the connecting seat close to the mounting step or the box side beam, the mounting step is a hollow structure connected to the hollow structure of the box side beam, and a fourth pressure relief port connected to the third pressure relief port is opened on a side of the mounting step or the box side beam close to the connecting seat.

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