Battery system

Abstract

The utility model provides a battery system. The battery system comprises a box body, wherein the box body is provided with a first area and a second area; a battery cell assembly is arranged in the first area, a plurality of battery cell assemblies are arranged in the second area, and the plurality of battery cell assemblies are distributed layer by layer along the height direction of the box body. According to the utility model, the problem that a battery system of a vehicle with a larger tail space in the related art is difficult to meet the high-energy requirement is solved.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and more specifically, to a battery system. Background Technology

[0002] With the rapid development of electric vehicle technology, vehicle battery systems, as core components of electric vehicles (EVs), plug-in hybrid electric vehicles (PHEVs), and hybrid electric vehicles (HEVs), have become crucial for improving vehicle performance and safety through their design and optimization. The basic task of a battery system is to store and supply electrical energy to drive the vehicle's electric motor, enabling the vehicle to move.

[0003] For passenger cars, the battery pack can be distributed relatively evenly at the bottom of the vehicle, and a single-layer cylindrical battery design can meet the requirements for high space utilization and energy density. However, the spatial structure of SUVs, MPVs, and off-road vehicles, especially the significantly increased Z-axis (vertical) space at the rear, and the higher requirements for the energy capacity (up to 100kWh or more) and structural strength of the battery system, cause the traditional single-layer cylindrical battery design to face the following key drawbacks:

[0004] 1. Low space utilization: The extra space in the Z-direction of the rear of the SUV model is not effectively utilized, resulting in insufficient overall energy density of the battery system, which makes it difficult to meet the high energy requirements of SUV models.

[0005] 2. Poor battery pack efficiency: A single design makes it difficult to balance the energy density and structural compactness of the battery system in SUV models, which limits the system's lightweight design and the improvement of its range.

[0006] 3. Insufficient collision safety: When an SUV is involved in a side or frontal collision, the impact force on the battery pack increases significantly, and the structural strength and protective measures of traditional designs may not be able to guarantee the safety of the battery system.

[0007] Instruction manual PN280589HZYWLN Utility Model Content

[0008] The main objective of this invention is to provide a battery system that solves the problem in related technologies where battery systems in vehicles with large rear spaces cannot meet high energy demands.

[0009] To achieve the above objectives, the present invention provides a battery system including a housing, the housing having a first region and a second region; a battery cell assembly is disposed in the first region, and multiple battery cell assemblies are disposed in the second region, the multiple battery cell assemblies being distributed layer by layer along the height direction of the housing.

[0010] Furthermore, the battery system also includes: a first support and pressure relief structure, which is disposed in a first region to support the cell assembly and form a first pressure relief channel; and a second support and pressure relief structure, which is disposed in a second region to support multiple cell assemblies and form a second pressure relief channel; wherein the housing has a first hollow pressure relief cavity, and the first pressure relief channel and the second pressure relief channel are respectively connected to the first hollow pressure relief cavity.

[0011] Furthermore, the housing includes a first base plate and a frame, the frame surrounding the periphery of the first base plate, and the frame having a first hollow pressure relief cavity.

[0012] Furthermore, the first support and pressure relief structure includes a carrier for supporting the battery cell assembly. The carrier is spaced vertically from the first base plate to form a pressure relief cavity, which is connected to the first hollow pressure relief cavity.

[0013] Furthermore, the second support pressure relief structure includes multiple support members, which are spaced apart along the height direction of the housing to support multiple battery cell assemblies respectively. Each support member is spaced apart from the adjacent component on the lower side to form a pressure relief cavity, which is connected to the first hollow pressure relief cavity.

[0014] Furthermore, the second support pressure relief structure also includes a support member, which is connected to two adjacent bearing members respectively. The support member has a second hollow pressure relief cavity, which is connected to two adjacent pressure relief cavities respectively.

[0015] Instruction manual PN280589HZYWLN

[0016] Furthermore, there are multiple support members, which are spaced apart circumferentially along the load-bearing member. When there are three or more load-bearing members, the support members of adjacent layers are staggered along the height direction of the box.

[0017] Furthermore, the cross-sectional area of ​​the second hollow pressure relief cavity is 25 mm². 2 Up to 200mm 2 .

[0018] Furthermore, the battery system also includes a crossbeam, which is disposed inside the housing and divides the housing into a first area and a second area. The first support pressure relief structure and the second support pressure relief structure are respectively connected to the crossbeam.

[0019] Furthermore, the crossbeam has a third hollow pressure relief cavity, the first pressure relief channel and the second pressure relief channel are connected to the third hollow pressure relief cavity, and the third hollow pressure relief cavity is connected to the first hollow pressure relief cavity.

[0020] Furthermore, both the first and second support pressure relief structures include a carrier for supporting the battery cell assembly. The carrier has a pressure relief hole corresponding to the battery cell of the battery cell assembly, and the pressure relief hole is connected to the first and second pressure relief channels.

[0021] Furthermore, the height of the pressure relief chamber ranges from 5mm to 30mm.

[0022] Furthermore, the cell assembly located in the first region includes multiple cells disposed within a housing; and / or the cell assembly located in the second region includes a battery module having multiple cells disposed within a housing.

[0023] Furthermore, the height of the enclosure in the first region ranges from 100mm to 150mm; and / or the height of the enclosure in the second region ranges from 200mm to 600mm.

[0024] Furthermore, along the length of the box, the length of the second region is between one-quarter and one-half of the length of the box.

[0025] Furthermore, the number of cells in multiple cell assemblies varies.

[0026] The present invention provides a battery system comprising a housing with a first region and a second region. One battery cell assembly is disposed in the first region, and multiple battery cell assemblies (instruction manual PN280589HZYWLN) are disposed in the second region. These multiple battery cell assemblies are distributed layer by layer along the height of the housing. By setting two regions on the housing and arranging different numbers and layouts of battery cell assemblies in different regions, particularly by utilizing the vertical space of the second region for multi-layered battery cell assembly, the space utilization rate of the battery system in vehicles with large rear-end space is greatly improved. This allows the battery system to store more electrical energy, meeting the demand for higher energy density and solving the problem in related technologies where battery systems in vehicles with large rear-end space cannot meet high energy requirements. Attached Figure Description

[0027] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0028] Figure 1 An exploded view of a battery system according to a specific embodiment of the present invention is shown;

[0029] Figure 2 A schematic diagram of the hidden top cover and one side frame of a battery system according to a specific embodiment of the present invention is shown;

[0030] Figure 3 A top view of a battery system according to a specific embodiment of the present invention is shown;

[0031] Figure 4 It shows Figure 3 Cross-sectional view at point AA;

[0032] Figure 5 It shows Figure 3 Cross-sectional view at point BB;

[0033] Figure 6 It shows Figure 5 A magnified view of a section at point C;

[0034] Figure 7 A schematic diagram of the frame structure of the long side of the box body according to a specific embodiment of the present invention is shown;

[0035] Instruction manual PN280589HZYWLN

[0036] Figure 8 A schematic diagram of the structure of a crossbeam according to a specific embodiment of the present invention is shown;

[0037] Figure 9 A partial exploded view of a second support and pressure relief structure according to a specific embodiment of the present invention is shown;

[0038] Figure 10 A structural schematic diagram of a support member according to a specific embodiment of the present invention is shown;

[0039] Figure 11 A schematic diagram of the structure of a support bracket according to a specific embodiment of the present invention is shown;

[0040] Figure 12 A schematic diagram of the frame structure of the rear part of the box body according to a specific embodiment of the present invention is shown.

[0041] The above figures include the following reference numerals:

[0042] 10. Housing; 11. First area; 12. Second area; 13. First bottom plate; 14. Frame; 141. First hollow pressure relief chamber; 142. First through hole; 15. Top cover; 20. Battery cell assembly; 21. Battery cell; 30. Support bracket; 31. First pressure relief hole; 40. First support plate; 41. Second pressure relief hole; 50. Second support plate; 60. First pressure relief chamber; 70. Second pressure relief chamber; 80. Support member; 81. Second hollow pressure relief chamber; 90. Crossbeam; 91. Third hollow pressure relief chamber; 92. Second through hole; 100. Support frame; 101. Side frame; 102. Second bottom plate; 103. Fourth hollow pressure relief chamber; 104. Third through hole. Detailed Implementation

[0043] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the application or use of the present utility model and its specification PN280589HZYWLN. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0044] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0045] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0046] To address the problem that battery systems in vehicles with large rear spaces cannot meet high energy demands in related technologies, this utility model provides a battery system.

[0047] like Figures 1 to 3 As shown, the battery system includes a housing 10, which has a first region 11 and a second region 12. A battery cell assembly 20 is disposed in the first region 11, and multiple battery cell assemblies 20 are disposed in the second region 12. The multiple battery cell assemblies 20 are distributed layer by layer along the height direction of the housing 10.

[0048] Instruction manual PN280589HZYWLN

[0049] By setting two areas on the housing 10 and setting different numbers and layouts of battery cell assemblies 20 according to different areas, especially by utilizing the vertical space of the second area 12 to arrange multi-layer battery cell assemblies 20, the space utilization rate of the battery system in vehicles with large rear space is greatly improved, thereby enabling the battery system to store more electrical energy and meet the demand for higher energy density.

[0050] Understandably, the height of the housing 10 in the second region 12 is greater than the height in the first region 11. The first region 11 is located at the front end of the housing 10, while the second region 12 is located at the rear end of the housing 10, thus making it suitable for battery systems with a large Z-axis dimension at the rear and a small dimension at the front end.

[0051] Specifically, in this embodiment, the height of the housing 10 in the first region 11 ranges from 100mm to 150mm. Correspondingly, the height of the housing 10 in the second region 12 ranges from 200mm to 600mm. By rationally setting the height distribution of the housing 10, the arrangement of the housing 10 is more compatible with the battery system of vehicles with larger rear space, improving space utilization and thus increasing energy density.

[0052] Furthermore, in this embodiment, along the length of the housing 10, the length of the second region 12 is between one-quarter and one-half of the length of the housing 10. This arrangement makes the layout of the second region 12 more compatible with the battery system of vehicles with larger rear space, improving space utilization and thus increasing energy density.

[0053] In this embodiment, the cell assembly 20 located in the first region 11 includes multiple cells 21, which are disposed within the housing 10. That is, the cell assembly 20 in the first region 11 is a CTP (Cell to Pack) design and is entirely encapsulated with foam. The CTP design reduces intermediate steps such as modules and battery racks in traditional battery packs, directly integrating the cells into the battery pack, improving assembly efficiency, reducing the volume and weight of non-energy storage components, thereby improving the space utilization and energy density of the first region 11.

[0054] Furthermore, in this embodiment, the cell assembly 20 located in the second region 12 includes a battery module having a plurality of cells 21, and the battery module is disposed within the housing 10.

[0055] The instruction manual PN280589HZYWLN indicates that the cell assembly 20 in the second region 12 is an MTP (Module to Pack) design. Each battery module is arranged in layers along the height of the housing 10, meaning one battery module is per layer. The MTP design optimizes module design, allowing for tighter integration into the battery pack, which also benefits space optimization and energy density improvement in the second region 12.

[0056] In this embodiment, the number of cells 21 in the multiple cell assemblies 20 varies. The number of cells 21 in each cell assembly 20 can be precisely designed based on the thermal characteristics of the cells 21. For example, in areas where heat is generated, the number of cells 21 in that cell assembly 20 can be reduced to increase heat dissipation space; while in areas where heat is generated, the number of cells 21 in that cell assembly 20 can be increased to improve energy density. This method helps maintain the overall temperature balance of the battery system and reduces the risk of thermal runaway.

[0057] In this embodiment, Figures 1 to 3 As shown, the box 10 includes a first base plate 13, a frame 14, and a top cover 15. The frame 14 surrounds the periphery of the first base plate 13. Specifically, the box 10 in this embodiment has a square structure, more specifically a rectangle, with the first region 11 and the second region 12 arranged sequentially along the length of the box 10. It should be noted that in this embodiment, the length direction of the box 10 is the X-axis direction, the width direction is the Y-axis direction, and the height direction is the Z-axis direction, as shown. Figure 3 As shown.

[0058] More specifically, there are four borders 14, which are sequentially arranged around the first base plate 13. The two borders 14 located on the long sides of the first base plate 13, corresponding to the second region 12, have a higher height than the portion corresponding to the first region 11. The two borders 14 located on the short sides of the first base plate 13 have a sloping section at the transition between the first region 11 and the second region 12. The height of the rear border 14 is greater than that of the front border 14. Correspondingly, the top cover 15 is Z-shaped, with a bend in the middle that matches the sloping section of the long side borders 14, thus fitting perfectly over the four borders 14.

[0059] In this embodiment, the battery system has two independent support structures and pressure relief designs in its two regions. Specifically, the battery system also includes a first support and pressure relief structure and a second support and pressure relief structure. The first support and pressure relief structure is disposed in the first region 11 to support the cell assembly 20 and form a first pressure relief channel. The second support and pressure relief structure is disposed in the second region 12 to support multiple cell assemblies 20 and form a second pressure relief channel.

[0060] like Figure 4 and Figure 7 As shown, the housing 10 has a first hollow pressure relief cavity 141, and a first pressure relief channel and a second pressure relief channel are respectively connected to the first hollow pressure relief cavity 141.

[0061] Furthermore, in this embodiment, the first hollow pressure relief cavity 141 is located within the frame 14. Specifically, the frame 14 in this embodiment is a profile structure with multiple hollow cavities extending horizontally along its length and spaced apart along its height or width. These hollow cavities are interconnected through through-holes. These multiple hollow cavities constitute the first hollow pressure relief cavity 141. That is, in the event of thermal runaway in the battery system of this embodiment, the pressure relief gas from the cell components 20 in both regions enters the housing 10 through two independent pressure relief channels. This arrangement ensures that the two pressure relief channels do not interfere with each other, allowing the cell components 20 in both regions to promptly discharge the pressure relief gas during thermal runaway, preventing heat propagation and ensuring the safety of the battery system.

[0062] like Figures 2 to 6 As shown, the battery system also includes a crossbeam 90. The crossbeam 90 is disposed within the housing 10 and extends along the Y-axis, thereby dividing the housing 10 into a first region 11 and a second region 12. A first support pressure relief structure and a second support pressure relief structure are respectively connected to the crossbeam 90.

[0063] Specifically, such as Figure 8 As shown, the crossbeam 90 has a first step and a second step sequentially arranged along the X-axis. The height of the second step is greater than the height of the first step. The first step connects to the first support pressure relief structure, while the second step connects to the second support pressure relief structure. It can be understood that the crossbeam 90 serves to support the first and second support pressure relief structures respectively, thereby enhancing the connection strength between the two structures.

[0064] like Figures 2 to 3 , Figures 5 to 6 As shown, the first support and pressure relief structure includes a support bracket 30, which serves as a support for the battery cell assembly 20. The support bracket 30 and the first base plate 13 are spaced vertically to form a first pressure relief cavity 60, which is connected to a first hollow pressure relief cavity 141.

[0065] Instruction manual PN280589HZYWLN

[0066] Furthermore, such as Figure 11 As shown, the support bracket 30 has a first pressure relief hole 31 corresponding to the battery cell 21 of the battery cell assembly 20, and the first pressure relief hole 31 is connected to the first pressure relief chamber 60.

[0067] Specifically, the support bracket 30 is fixedly connected to the first step of the crossbeam 90 on one side along the X-axis. Furthermore, a connector is provided at the front end of the housing 10, and the support bracket 30 is fixedly connected to the connector on the other side along the X-axis. The connector and the frame 14 at that location can be fixedly connected by reinforcing ribs to ensure a firm connection. The space formed between the connector and the frame 14 at that location is used to install electrical components.

[0068] In this embodiment, the first pressure relief chamber 60 is formed by the first base plate 13, the supporting bracket 30, the crossbeam 90, and the connecting parts. Figure 7 As shown, a first through-hole 142 is provided on the frame 14 located on the long side of the housing 10. The first pressure relief chamber 60 is connected to the first hollow pressure relief chamber 141 through the first through-hole 142. When the battery cell assembly 20 in the first region 11 experiences thermal runaway, the pressure relief gas enters the first pressure relief chamber 60 through the first pressure relief hole 31, then enters the first hollow pressure relief chamber 141 through the first through-hole 142, and is subsequently discharged to the outside. It can be understood that the overall space of the first pressure relief hole 31 and the first pressure relief chamber 60 forms a first pressure relief channel.

[0069] In this embodiment, there are multiple first through holes 142, which are spaced apart along the length of the frame 14 to improve the pressure relief speed.

[0070] In this embodiment, the second support and pressure relief structure includes multiple support members, which are spaced apart along the height direction of the housing 10 to support multiple battery cell assemblies 20 respectively. Each support member is spaced apart from the adjacent component on the lower side to form a pressure relief cavity, which is connected to the first hollow pressure relief cavity 141.

[0071] It is understandable that the battery cell assembly 20 in the second region 12 can be two or more, that is, it can be a two-layer or more layer structure. The following is a specific explanation using a two-layer battery cell assembly 20 as an example.

[0072] like Figures 2 to 6As shown, the second support and pressure relief structure includes a first support plate 40 and a second support plate 50, serving as support members for supporting two battery cell assemblies 20. Furthermore, the second support and pressure relief structure, as described in the specification PN280589HZYWLN, also includes a support frame 100. The first support plate 40 is located below the support frame 100, and the second support plate 50 is disposed within the support frame 100 and connected and fixed to it. The first support plate 40, the support frame 100, and the second support plate 50 are connected by a support member 80.

[0073] Specifically, both the first carrier plate 40 and the second carrier plate 50 have a central recess and peripheral edges, and the bottom of the cell assembly 20 is located within the central recess. For example... Figure 6 As shown, one edge of the first bearing plate 40 along the X-axis direction is connected and fixed to the second step of the crossbeam 90. Further, as... Figure 12 As shown, the frame 14 at the rear of the housing 10 is L-shaped. The bottom horizontal section of this frame 14 has a third step, the height of which is the same as the second step of the crossbeam 90. The other edge of the first bearing plate 40 along the X-axis is connected and fixed to the third step. Correspondingly, the two frames 14 located on the long sides of the housing 10 are also L-shaped, as shown... Figure 7 As shown, the bottom horizontal sections of the two frame 14 have connecting steps. The two sides of the first bearing plate 40 along the Y-axis direction are connected and fixed to the connecting steps of the two frame 14, thereby realizing the overall connection and fixation of the second support and pressure relief structure to the box 10.

[0074] Furthermore, through the above arrangement, the first bearing plate 40 and the first base plate 13 are spaced apart, thereby forming a second pressure relief chamber 70, which communicates with the first hollow pressure relief chamber 141. In this embodiment, the second pressure relief chamber 70 is formed by the first base plate 13, the first bearing plate 40, the crossbeam 90, and the frame 14 at the rear of the housing 10. Specifically, as shown... Figure 7 As shown, the frame 14 located on the long side of the housing 10 has multiple sets of first through holes 142. Two sets of first through holes 142 are respectively set to correspond to the second pressure relief cavity 70 formed by the first pressure relief cavity 60 and the first bearing plate 40. Each set can include multiple first through holes 142. The second pressure relief cavity 70 formed by the first bearing plate 40 is connected to the first hollow pressure relief cavity 141 through the corresponding set of first through holes 142.

[0075] In this embodiment, the height of the first pressure relief chamber 60 and the second pressure relief chamber 70 ranges from 5mm to 30mm. By reasonably setting the height of the pressure relief chambers, the pressure relief gas can be discharged outward in a timely manner through the pressure relief chambers, ensuring the safety of the battery system, while ensuring that the overall height of the battery system is not too high.

[0076] Instruction manual PN280589HZYWLN

[0077] Furthermore, such as Figure 9 As shown, the supporting frame 100 includes side frames 101 and a second base plate 102, with the side frames 101 surrounding the periphery of the second base plate 102. Specifically, there are four side frames 101, which are sequentially arranged around the second base plate 102. The central recess of the second supporting plate 50 is located within the space enclosed by the side frames 101, and its peripheral edges are respectively connected and fixed to the side frames 101. The second supporting plate 50 and the second base plate 102 are spaced apart to form another second pressure relief chamber 70, namely the second pressure relief chamber 70 located on the upper layer.

[0078] In this embodiment, the upper-level second pressure relief chamber 70 is formed by the second base plate 102, the second support plate 50, and the side frame 101. The upper-level second pressure relief chamber 70 is connected to the first hollow pressure relief chamber 141 through the support member 80 and the crossbeam 90.

[0079] Specifically, such as Figure 6 and Figure 10 As shown, the support member 80 has a second hollow pressure relief cavity 81 extending along the Z-axis direction. The crossbeam 90 has a third hollow pressure relief cavity 91 extending along the Y-axis direction, and the crossbeam 90 is provided with a second through hole 92. The second through hole 92 is opened on both sides of the crossbeam 90 along the X-axis direction. The first pressure relief cavity 60 and the second pressure relief cavity 70 located in the lower layer are respectively connected to the third hollow pressure relief cavity 91 through the second through hole 92. That is to say, both the first pressure relief channel and the second pressure relief channel are connected to the third hollow pressure relief cavity 91. Furthermore, one of the multiple sets of first through holes 142 located on the long side of the frame 14 of the housing 10 is correspondingly arranged with the third hollow pressure relief cavity 91, so that the third hollow pressure relief cavity 91 of the crossbeam 90 is connected to the first hollow pressure relief cavity 141 of the frame 14 on the long side of the housing 10.

[0080] In this embodiment, the cross-sectional area of ​​the second hollow pressure relief cavity 81 is 25 mm. 2 Up to 200mm 2 By reasonably setting the cross-sectional area of ​​the second hollow pressure relief chamber 81, the pressure relief gas can be discharged outward in a timely manner through the second hollow pressure relief chamber 81 while keeping the volume of the support member 80 from being too large, thus ensuring the safety of the battery system.

[0081] Furthermore, such as Figure 6 and Figure 9 As shown, the side frame 101 has a fourth hollow pressure relief cavity 103 extending along its length, and a third through hole 104 communicating with the fourth hollow pressure relief cavity 103. The second hollow pressure relief cavity 81 of the support member 80 communicates with the fourth hollow pressure relief cavity 103 of the side frame 101. In this embodiment, the side frame 101 can be a profile structure with a hollow cavity, wherein the cavity is the fourth hollow pressure relief cavity 103.

[0082] Instruction manual PN280589HZYWLN

[0083] Specifically, mounting holes are provided on the second steps of the side frame 101 and the crossbeam 90, as well as on the peripheral edges of the first bearing plate 40 and the second bearing plate 50. The upper and lower ends of the second hollow pressure relief cavity 81 of the support member 80 are connected to the fourth hollow pressure relief cavity 103 of the side frame 101 and the third hollow pressure relief cavity 91 of the crossbeam through these mounting holes, respectively. Furthermore, mounting holes are also provided on the second steps of the support member 80, the side frame 101, and the crossbeam 90, as well as on the peripheral edges of the first bearing plate 40 and the second bearing plate 50, so that the upper and lower ends of the support member 80 are connected and fixed to the side frame 101 and the second bearing plate 50, and the crossbeam 90 and the first bearing plate 40, respectively, by fasteners passing through these mounting holes. In this embodiment, the fasteners can be bolts.

[0084] Furthermore, such as Figure 9 As shown, the first bearing plate 40 and the second bearing plate 50 are provided with a second pressure relief hole 41, which is connected to the second pressure relief chamber 70. When the battery cell assembly 20 in the second region 12 experiences thermal runaway, the pressure relief gas of the lower battery cell assembly 20 enters the lower second pressure relief chamber 70 through the second pressure relief hole 41, and then directly enters the first hollow pressure relief chamber 141 of the frame 14 through the first through hole 142. Alternatively, some of the pressure relief gas enters the third hollow pressure relief chamber 91 of the crossbeam 90 through the second through hole 92, and then enters the first hollow pressure relief chamber 141 of the frame 14, and is finally discharged to the outside. Correspondingly, as Figure 4 As indicated by the arrows, the depressurized gas from the upper-layer battery cell assembly 20 enters the upper-layer second depressurization chamber 70 through the second depressurization hole 41 of the second support plate 50, then enters the fourth hollow depressurization chamber 103 of the side frame 101 through the third through hole 104, and then enters the first hollow depressurization chamber 141 of the frame 14 via the second hollow depressurization chamber 81 of the support member 80 and the third hollow depressurization chamber 91 of the crossbeam 90, finally being discharged to the outside. It can be understood that the second depressurization channel is formed by the overall space of the second depressurization hole 41, the second depressurization chamber 70, the fourth hollow depressurization chamber 103, and the second and third hollow depressurization chambers 81 and 91.

[0085] As can be seen from the above, in this embodiment, the second hollow pressure relief cavity 81 of the support member 80 is connected to the second pressure relief cavities 70 of the upper and lower layers respectively through the crossbeam 90. Of course, when the battery system of this application does not have the crossbeam 90, the second hollow pressure relief cavity 81 of the support member 80 can be directly connected to the second pressure relief cavities 70 of the upper and lower layers respectively.

[0086] Instruction manual PN280589HZYWLN

[0087] In this embodiment, there are multiple support members 80, which are spaced apart circumferentially along the support member. Specifically, the multiple support members 80 are divided into two groups, with each group located on one side of the support frame 100 along the X-axis, i.e., on the two long sides of the support frame 100, and the multiple support members 80 in each group are spaced apart along the Y-axis. It can be understood that the third through hole 104 corresponds one-to-one with the support member 80.

[0088] In this embodiment, one set of support members 80 is fixedly connected to the second step of the crossbeam 90, and another set of support members 80 is fixedly connected to the third step of the frame 14 at the rear of the housing 10. The connection method between the support member 80 and the third step is the same as that between the second step and will not be described again here. Furthermore, the frame 14 at the rear of the housing 10 also has a first hollow pressure relief cavity 141 and a first through hole 142. The second pressure relief cavity 70 located in the lower layer communicates with the first hollow pressure relief cavity 141 through the first through hole 142 therein. It can be understood that the first hollow pressure relief cavities 141 of each frame 14 are interconnected.

[0089] Furthermore, when the battery cell assembly 20 has three or more layers, that is, when there are three or more support components, the support components 80 of adjacent layers are staggered along the height direction of the housing 10. This facilitates the installation of the support components 80 and provides sufficient space for the support components 80 to connect the upper and lower adjacent pressure relief chambers.

[0090] As can be seen from the above description, the above embodiments of this utility model achieve the following technical effects: The battery system includes a housing 10, which has a first region 11 and a second region 12. A cell assembly 20 is disposed in the first region 11, and multiple cell assemblies 20 are disposed in the second region 12. The multiple cell assemblies 20 are distributed layer by layer along the height direction of the housing 10. By setting two regions on the housing 10 and setting different numbers and layouts of cell assemblies 20 according to different regions, especially by utilizing the vertical space of the second region 12 to arrange multiple layers of cell assemblies 20, the space utilization rate of the battery system in vehicles with large rear space is greatly improved, thereby enabling the battery system to store more electrical energy and meet the demand for higher energy density.

[0091] Instruction manual PN280589HZYWLN

[0092] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0093] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0094] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0095] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A battery system, characterized in that, The enclosure includes a housing (10), which has a first region (11) and a second region (12); a battery cell assembly (20) is disposed in the first region (11), and multiple battery cell assemblies (20) are disposed in the second region (12), with the multiple battery cell assemblies (20) distributed layer by layer along the height direction of the housing (10).

2. The battery system according to claim 1, characterized in that, The battery system also includes: A first support and pressure relief structure is disposed in the first region (11) to support the battery cell assembly (20) and form a first pressure relief channel; The second support and pressure relief structure is disposed in the second region (12) to support the plurality of said cell assemblies (20) and form a second pressure relief channel; The housing (10) has a first hollow pressure relief cavity (141), and the first pressure relief channel and the second pressure relief channel are respectively connected to the first hollow pressure relief cavity (141).

3. The battery system according to claim 2, characterized in that, The housing (10) includes a first base plate (13) and a frame (14), the frame (14) surrounding the periphery of the first base plate (13), and the frame (14) having the first hollow pressure relief cavity (141).

4. The battery system according to claim 3, characterized in that, The first support pressure relief structure includes a carrier for supporting the battery cell assembly (20). The carrier is spaced vertically from the first base plate (13) to form a pressure relief cavity, which is connected to the first hollow pressure relief cavity (141).

5. The battery system according to claim 2, characterized in that, The second support and pressure relief structure includes multiple support members, which are spaced apart along the height direction of the housing (10) to support multiple battery cell assemblies (20) respectively. Each support member is spaced apart from the adjacent component on the lower side to form a pressure relief cavity, which is connected to the first hollow pressure relief cavity (141).

6. The battery system according to claim 5, characterized in that, The second support pressure relief structure further includes a support member (80), which is connected to two adjacent bearing members respectively. The support member (80) has a second hollow pressure relief cavity (81), which is connected to two adjacent pressure relief cavities respectively.

7. The battery system according to claim 6, characterized in that, There are multiple support members (80), and the multiple support members (80) are arranged at intervals along the circumference of the carrier. When there are three or more carriers, the support members (80) of adjacent layers are staggered along the height direction of the box (10).

8. The battery system according to claim 6, characterized in that, The cross-sectional area of ​​the second hollow pressure relief cavity (81) is 25 mm. 2 Up to 200mm 2 .

9. The battery system according to claim 2, characterized in that, The battery system also includes a crossbeam (90), which is disposed inside the housing (10) and divides the housing (10) into a first region (11) and a second region (12). The first support pressure relief structure and the second support pressure relief structure are respectively connected to the crossbeam (90).

10. The battery system according to claim 9, characterized in that, The crossbeam (90) has a third hollow pressure relief cavity (91), the first pressure relief channel and the second pressure relief channel are connected to the third hollow pressure relief cavity (91), and the third hollow pressure relief cavity (91) is connected to the first hollow pressure relief cavity (141).

11. The battery system according to claim 2, characterized in that, Both the first support pressure relief structure and the second support pressure relief structure include a carrier for supporting the battery cell assembly (20). The carrier has a pressure relief hole corresponding to the battery cell (21) of the battery cell assembly (20). The pressure relief hole is connected to the first pressure relief channel and the second pressure relief channel.

12. The battery system according to claim 4 or 5, characterized in that, The height of the pressure relief chamber ranges from 5mm to 30mm.

13. The battery system according to any one of claims 1 to 11, characterized in that, The battery cell assembly (20) located in the first region (11) includes a plurality of battery cells (21), which are disposed within the housing (10); and / or The cell assembly (20) located in the second region (12) includes a battery module having a plurality of the cells (21) disposed within the housing (10).

14. The battery system according to any one of claims 1 to 11, characterized in that, The height of the enclosure (10) in the first region (11) ranges from 100mm to 150mm; and / or The height of the box (10) in the second region (12) ranges from 200mm to 600mm.

15. The battery system according to any one of claims 1 to 11, characterized in that, Along the length of the box (10), the length of the second region (12) is between one-quarter and one-half of the length of the box (10).

16. The battery system according to any one of claims 1 to 11, characterized in that, The number of cells (21) in the multiple cell assemblies (20) varies.

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