Solid-state battery module boxes, solid-state battery modules and vehicles

Abstract

This utility model relates to a solid-state battery module box, a solid-state battery module, and a vehicle, comprising: a box body; an end plate disposed within the box body and used to define an installation space for mounting the solid-state battery cell assembly, the end plate being located on at least one side of the installation space along the x-direction; an elastic member connected to the end plate, the elastic member having a spring force that drives the end plate to move away from the installation space along the x-direction; and a telescopic mechanism abutting against the end plate, the telescopic mechanism being telescopic along the x-direction, the telescopic mechanism having a thrust force that drives the end plate to move closer to the installation space along the x-direction. The solid-state battery module box of this utility model utilizes the elastic member and the telescopic mechanism to dynamically apply force to the end plate, so that the end plate applies pressure to the solid-state battery cell assembly, ensuring that the pressure on the solid-state battery cell assembly meets the requirements while reducing the probability of excessive pressure and localized stress concentration in the solid-state battery cell assembly.

Description

Technical Field

[0001] This utility model relates to the field of solid-state battery module technology, specifically to a solid-state battery module box, a solid-state battery module, and a vehicle. Background Technology

[0002] In recent years, with the development of the new energy vehicle industry, the market demand for the energy density of rechargeable batteries has been continuously increasing. Solid-state batteries, due to their advantages of high energy density and high safety, have become a research hotspot. Solid-state batteries need to be maintained in a high-pressure environment to ensure the stability of the solid-solid interface. However, if the pressure of the solid-state battery is too high, it may lead to local stress concentration, which will also affect the performance of the battery. It is difficult for solid-state battery modules in related technologies to guarantee that the pressure of the solid-state battery is within a suitable range. Utility Model Content

[0003] One objective of this utility model is to provide a solid-state battery module box to solve the problem that the pressure of solid-state cells in the prior art is difficult to be within a suitable range; another objective is to provide a solid-state battery module; and a third objective is to provide a vehicle.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A solid-state battery module box includes: a box body; an end plate disposed within the box body and used to define an installation space for mounting solid-state battery cells, the end plate being located on one side of the installation space along the x-direction; an elastic member connected to the end plate, the elastic member having a spring force that drives the end plate to move away from the installation space along the x-direction; and a telescopic mechanism abutting against the end plate, the telescopic mechanism being telescopic along the x-direction, the telescopic mechanism having a thrust that drives the end plate to move closer to the installation space along the x-direction.

[0006] Based on the aforementioned technical means, the elastic element and the telescopic mechanism work together to dynamically apply force to the end plate, thereby causing the end plate to exert pressure on the solid-state battery cell assembly. On the one hand, this avoids the elastic element and the telescopic mechanism directly applying pressure to the solid-state battery cell assembly, resulting in a more uniform force distribution and preventing localized stress concentration. On the other hand, the elastic element can offset part of the pressure from the telescopic mechanism through its own deformation, thus reducing the pressure borne by the solid-state battery cell assembly. The telescopic mechanism has a wider adjustable pressure range, which helps improve the accuracy of the pressure applied by the telescopic mechanism. Furthermore, by adjusting the size and initial compression of the elastic element, the pressure required by the telescopic mechanism and the solid-state battery cell assembly can be adapted. A good balance can be achieved among the three, thereby ensuring that the pressure borne by the solid-state battery cell assembly is within an optimal range, thereby improving the working performance of the solid-state battery cell assembly.

[0007] Furthermore, the end plate is slidably connected to the housing along the x-direction.

[0008] Based on the above technical means, the movement direction of the end plate can be restricted, the relative position between the end plate and the housing can be controlled, the end plate can be prevented from being deflected by force, and the pressure applied by the end plate to the solid-state cell assembly can be uniform, which is conducive to ensuring the working performance of each solid-state cell.

[0009] Furthermore, the solid-state battery module box also includes: a guide rod, which is slidably connected to the end plate, and the elastic element is sleeved on the guide rod.

[0010] Based on the above technical means, the relative position between the elastic element and the end plate can be fixed more reliably, and when the elastic element is compressed, the guide rod can limit the shape of the elastic element, avoid the elastic element from not mainly stretching and deforming along its axial direction, and ensure that the elastic element mainly applies driving force to the end plate in the x direction.

[0011] Furthermore, there are multiple guide rods, which are spaced apart circumferentially along the end plate; there are multiple elastic elements, which are correspondingly sleeved on the multiple guide rods.

[0012] Based on the above technical means, the driving force applied by the elastic element to the end plate is increased, the force on each elastic element is reduced, and the elastic element is prevented from deforming and failing due to excessive force. In addition, multiple guide rods can guide the movement of the end plate, which helps to improve the reliability of the end plate movement, prevent the end plate from deflecting under force, and the solid-state cell group is more evenly stressed, which helps to ensure the working performance of each solid-state cell.

[0013] Furthermore, the end plate has a protrusion on the side facing the guide rod, the guide rod is movably inserted into the protrusion, and the elastic element is connected to the protrusion.

[0014] Based on the above technical means, not only can the relative position between the end plate and the guide rod be defined, but the protrusion can also abut against the elastic element. Without increasing the overall thickness of the end plate, the compression size of the elastic element can be increased, which is beneficial to adjusting the pressure applied by the end plate to the solid-state battery pack.

[0015] Furthermore, the telescopic mechanism includes multiple telescopic members, the driving end of each telescopic member abuts against the end plate, the telescopic member is telescopic in the x direction, the multiple telescopic members are spaced apart, and the multiple telescopic members are symmetrically arranged with respect to the center of the end plate.

[0016] Based on the aforementioned technical means, on the one hand, the thrust applied to the end plate by the telescopic mechanism is increased; on the other hand, the thrust required for each telescopic component is reduced, lowering the material requirements for the telescopic components and increasing the range of materials that can be selected, thereby achieving the goal of meeting the thrust requirements while reducing costs. Furthermore, the symmetrical arrangement of multiple telescopic components with respect to the center of the end plate ensures uniform force distribution along the x-direction of the solid-state battery pack, which is beneficial for guaranteeing the working performance of each solid-state battery cell.

[0017] Furthermore, the end plate is located on one side of the mounting space along the x-direction, the elastic element and the mounting space are located on the same side of the end plate, the elastic element is compressed between the end plate and the housing, and the telescopic mechanism abuts against the side of the end plate facing away from the mounting space; or, the end plates are located on opposite sides of the mounting space along the x-direction, the elastic element is compressed between two end plates, and the telescopic mechanism corresponding to each end plate abuts against the side of the end plate facing away from the mounting space.

[0018] Based on the aforementioned technical methods, applying pressure to the solid-state battery pack from one side along the x-direction can reduce the number of parts, lower costs, and simplify assembly. Applying pressure to the solid-state battery pack from opposite sides along the x-direction can increase the pressure adjustment range and enhance the controllability of pressure regulation, which is beneficial for ensuring that the solid-state battery pack remains within its efficient operating range.

[0019] A solid-state battery module includes the aforementioned solid-state battery module box; a solid-state battery cell assembly is disposed within the installation space, the solid-state battery cell assembly including a plurality of solid-state battery cells arranged along the x-direction.

[0020] Furthermore, there are multiple solid-state battery cells, which are spaced apart, and the end plate abuts against the multiple solid-state battery cells.

[0021] Based on the above technical means, by setting up multiple solid-state battery cell groups, the energy storage capacity of the solid-state battery module can be increased, and the battery life of the solid-state battery module can be improved. In addition, the end plate can apply pressure to multiple solid-state battery cell groups at the same time, reducing the force on each solid-state battery cell group. This helps to control the pressure on each solid-state battery cell group to meet the requirements and reduces the probability of the solid-state battery cell group being damaged due to excessive force.

[0022] Furthermore, the solid-state battery pack also includes a buffer heat insulation pad, and at least one buffer heat insulation pad is provided between two adjacent solid-state battery cells.

[0023] Based on the above technical means, on the one hand, heat exchange between adjacent solid-state cells can be prevented, reducing the risk of thermal propagation and thermal runaway in solid-state cell groups and improving the safety of solid-state battery modules. On the other hand, the buffer heat insulation pad can undergo elastic deformation to absorb a certain volume change of solid-state cells, better adapting to the volume changes that occur in solid-state cells during charging and discharging.

[0024] A vehicle comprising the aforementioned solid-state battery module.

[0025] The beneficial effects of this utility model are:

[0026] (1) The end plate is dynamically applied by the elastic element and the telescopic mechanism together, so that the end plate applies pressure to the solid-state battery cell assembly. On the one hand, the pressure on the solid-state battery cell assembly is avoided between the elastic element and the telescopic mechanism, and the solid-state battery cell assembly is subjected to more uniform force, avoiding the problem of local stress concentration. On the other hand, the elastic element can offset part of the pressure of the telescopic mechanism through the elastic force generated by its own deformation, thereby reducing the pressure on the solid-state battery cell assembly. The pressure adjustment range of the telescopic mechanism is larger, which is conducive to improving the accuracy of the pressure applied by the telescopic mechanism. The pressure of the telescopic mechanism and the pressure required by the solid-state battery cell assembly can also be adapted by adjusting the size of the elastic element and the initial compression amount. The three can achieve a good balance, thereby ensuring that the pressure on the solid-state battery cell assembly is in a better range, so as to improve the working performance of the solid-state battery cell assembly.

[0027] (2) It can limit the movement direction of the end plate, ensure that the relative position between the end plate and the housing is controllable, avoid the end plate being deflected by force, and thus the pressure applied by the end plate to the solid cell assembly is uniform, which is conducive to ensuring the working performance of each solid cell.

[0028] (3) It can more reliably fix the relative position between the elastic element and the end plate, and when the elastic element is compressed, the guide rod can limit the shape of the elastic element, avoid the elastic element from not mainly stretching and deforming along its axial direction, and ensure that the elastic element mainly applies driving force to the end plate along the x direction.

[0029] (4) The driving force applied by the elastic element to the end plate is increased, the force on each elastic element is reduced, and the elastic element is prevented from being over-stressed and causing deformation failure. In addition, multiple guide rods can guide the movement of the end plate, which is conducive to improving the reliability of the end plate movement, preventing the end plate from being deflected by force, and the solid-state cell group is more uniformly stressed, which is conducive to ensuring the working performance of each solid-state cell.

[0030] (5) Not only can it limit the relative position between the end plate and the guide rod, but the protrusion can also abut against the elastic element. Without increasing the overall thickness of the end plate, it can increase the compression size of the elastic element, which is beneficial to adjust the pressure applied by the end plate to the solid-state battery pack.

[0031] (6) On the one hand, the thrust applied to the end plate by the telescopic mechanism is increased; on the other hand, the thrust required for each telescopic component is reduced, which lowers the material requirements for the telescopic components and increases the range of materials available for the telescopic components, so as to meet the thrust requirements while reducing costs. In addition, the symmetrical arrangement of multiple telescopic components with respect to the center of the end plate can ensure that the force is uniform along the x-direction of the solid-state battery pack, which is beneficial to ensuring the working performance of each solid-state battery cell.

[0032] (7) By setting up multiple solid-state battery cell groups, the energy storage capacity of the solid-state battery module can be increased, and the battery life of the solid-state battery module can be improved. In addition, the end plate can apply pressure to multiple solid-state battery cell groups at the same time, reducing the force on each solid-state battery cell group, which is conducive to controlling the pressure on each solid-state battery cell group to meet the requirements, and reducing the probability of the solid-state battery cell group being damaged due to excessive force.

[0033] (8) Applying pressure to the solid-state battery pack from one side along the x-direction can reduce the number of parts, lower costs, and simplify assembly. Applying pressure to the solid-state battery pack from opposite sides along the x-direction can increase the pressure adjustment range and controllability, which helps ensure that the solid-state battery pack is maintained within its high-efficiency operating range.

[0034] (9) On the one hand, it can prevent heat exchange between adjacent solid cells, reduce the risk of heat spread and thermal runaway in solid cell groups, and improve the safety of solid battery modules. On the other hand, the buffer heat insulation pad can undergo elastic deformation to absorb a certain volume change of solid cells and better adapt to the volume change of solid cells during charging and discharging. Attached Figure Description

[0035] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the solid-state battery module in an embodiment of this utility model.

[0037] Figure 2 yes Figure 1 A cross-sectional view along line AA.

[0038] Figure 3 yes Figure 1 A cross-sectional view along line BB.

[0039] Figure 4 This is a schematic diagram of the solid-state battery cell in an embodiment of this utility model.

[0040] Explanation of reference numerals in the attached figures:

[0041] 1. Solid-state battery module; 2. Solid-state battery module housing;

[0042] 100. Enclosure; 110. Installation space;

[0043] 200. Solid-state battery cell assembly; 210. Solid-state battery cell; 211. Aluminum-plastic film; 212. Electrode assembly; 213. Tab; 214. Tab adhesive;

[0044] 310. End plate; 311. Protrusion;

[0045] 400. Elastic component; 410. Guide rod;

[0046] 510. Telescopic mechanism; 511. Telescopic component. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0048] The embodiments of this utility model will be described below with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be understood that the preferred embodiments are only for illustrating this utility model and not for limiting the scope of protection of this utility model.

[0049] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0050] The following is combined Figures 1 to 4 The following describes embodiments of the present invention.

[0051] This utility model embodiment proposes a solid-state battery module box 2, which includes a box body 100, an end plate 310, an elastic element 400, and a telescopic mechanism 510.

[0052] An end plate 310 is disposed within the housing 100 and defines an installation space 110 for mounting the solid-state battery pack 200. The end plate 310 is located on at least one side of the installation space 110 along the x-direction. An elastic member 400 is connected to the end plate 310 and has a spring force that drives the end plate 310 to move away from the installation space 110 along the x-direction. A telescopic mechanism 510 is connected to the housing 100, abuts against the end plate 310, and is telescopic along the x-direction. The telescopic mechanism 510 has a thrust that drives the end plate 310 to move closer to the installation space 110 along the x-direction.

[0053] In other words, the telescopic mechanism 510 and the elastic force direction of the elastic element 400 are in the same direction, and both are perpendicular to the solid-state battery cell 210. The elastic element 400 can be a spring or disc spring, or other elastic structure. Alternatively, the elastic element 400 and the mounting space 110 are located on the same side of the end plate 310, in which case the elastic element 400 can be compressed between the end plate 310 and the housing 100; or the elastic element 400 and the mounting space 110 are located on opposite sides of the thickness direction of the end plate 310, in which case the elastic element 400 can be stretched between the end plate 310 and the housing 100.

[0054] The housing 100 may be constructed with a sealed cavity, within which the solid-state battery cell assembly 200, end plate 310, elastic element 400, and telescopic mechanism 510 are all housed. The end plate 310 can reciprocate under the drive of the elastic element 400 and the telescopic mechanism 510, and the end plate 310 is in close contact with the solid-state battery cell assembly 200. Therefore, the elastic element 400 and the telescopic mechanism 510 can apply pressure to the solid-state battery cell assembly 200 through the end plate 310, ensuring that each solid-state battery cell 210 is maintained at its optimal operating pressure.

[0055] A certain gap needs to be maintained between the end plate 310 and the housing 100 to ensure that the end plate 310 will not rub against the housing 100 during reciprocating motion. The gap also needs to be large enough to accommodate the size of the stacking claws to ensure that the solid-state battery pack 200 can be packed smoothly. The gap can be 20mm to 100mm.

[0056] For example, the materials of the housing 100 and end plate 310 may include high-strength steel or aluminum alloy, and the materials of the guide rod 410 and telescopic mechanism 510 may include aluminum alloy. The strength of the housing 100, end plate 310, guide rod 410, and telescopic mechanism 510 must all be higher than the pressure of the solid-state battery pack 200 during operation, so that the above structure can withstand the expansion force generated by the solid-state battery pack 200 during operation, thereby avoiding damage due to overload. The telescopic mechanism 510 can be a device capable of automatically adjusting pressure, such as a cylinder or hydraulic cylinder.

[0057] In this embodiment of the present invention, the solid-state battery module box 2 is installed in the mounting space 110 of the solid-state battery cell assembly 200. When the solid-state battery cell assembly 200 is charging and its volume expands, the end plate 310 applies pressure to the telescopic mechanism 510, causing the telescopic mechanism 510 to contract and the elastic force of the elastic member 400 to decrease. When the solid-state battery cell assembly 200 is discharging and its volume shrinks, the telescopic mechanism 510 extends and applies pressure to the solid-state battery cell assembly 200 through the end plate 310, increasing the elastic force of the elastic member 400.

[0058] Through the cooperation of the elastic element 400 and the telescopic mechanism 510, a stable working pressure can be continuously applied to the solid-state battery cell assembly 200 through the end plate 310, keeping the pressure on the solid-state battery cell 210 within the required working pressure range, ensuring the stability of the internal interface of the solid-state battery cell 210. The working pressure can be 2 MPa to 6 MPa, for example, 2 MPa, 4 MPa, 6 MPa. Furthermore, the telescopic dimensions of the elastic element 400 and the telescopic mechanism 510 can be dynamically adjusted to adapt to the volume changes during the expansion and contraction of the solid-state battery cell assembly 200, thereby improving the stability and reliability of the solid-state battery cell 210 in practical applications.

[0059] The difference between the maximum thickness of the solid-state battery pack 200 after charging expansion and the minimum thickness after discharging contraction is H. In other words, the difference between the thickness of the solid-state battery pack 200 when the SOC is 100% and the thickness of the solid-state battery pack 200 when the SOC is 0% is H. Therefore, the travel of the elastic element 400 needs to be greater than H. H can be 50mm to 200mm, for example, H is 20mm, 40mm, 60mm, 100mm, and 200mm.

[0060] The response of the elastic element 400 can be based on the maximum change H in the thickness of the solid-state cell 210, and the force exerted by the elastic element 400 on the end plate 310 is F. 弹 The force exerted by the solid-state battery cell assembly 200 on the end plate 310 is F. 电 F 电 To maintain stability, the pressure F on the telescopic mechanism 510... 伸 =F 弹 +F 电 F 伸 With F弹 The relationship between F and H is non-linear; specifically, F 弹 It is determined by the dimensions of the elastic element 400 and its initial deformation.

[0061] In this embodiment of the invention, the elastic element 400 and the telescopic mechanism 510 work together to dynamically apply force to the end plate 310, so that the end plate 310 applies pressure to the solid-state battery cell assembly 200. On the one hand, this avoids pressure on the solid-state battery cell assembly 200 from the elastic element 400 and the telescopic mechanism 510, resulting in a more uniform force distribution on the solid-state battery cell assembly 200 and preventing localized stress concentration. On the other hand, the elastic element 400 can generate elastic force through its own deformation to offset part of the pressure from the telescopic mechanism 510, thereby reducing the pressure borne by the solid-state battery cell assembly 200. The telescopic mechanism 510 has a wider pressure adjustment range, which helps to improve the accuracy of the pressure applied by the telescopic mechanism 510. The size and initial compression of the elastic element 400 can also be adjusted to adapt to the pressure of the telescopic mechanism 510 and the pressure required by the solid-state battery cell assembly 200. A good balance can be achieved among the three, thereby ensuring that the pressure borne by the solid-state battery cell assembly 200 is within an optimal range, thus improving the working performance of the solid-state battery cell assembly 200.

[0062] In addition, in some embodiments of this utility model, a pressure sensor, a position sensor, or a size sensor can be provided. The pressure sensor can be used to detect the elastic force of the elastic element 400, the position sensor can detect the deformation position of the elastic element 400, and the size sensor can detect the length change of the elastic element 400. One, two, or three of the above three sensors can be installed. Based on the detection data of the sensors and the charging data of the solid-state battery cell assembly 200, it is possible to determine whether the pressure on the solid-state battery cell assembly 200 meets the requirements. There is no need to set sensors on the solid-state battery cell assembly 200, which can improve the convenience of sensor placement and reduce costs according to requirements.

[0063] Specifically, the end plate 310 is located on one side of the mounting space 110 along the x-direction, the elastic element 400 and the mounting space 110 are located on the same side of the end plate 310, the elastic element 400 is compressed between the end plate 310 and the housing 100, and the telescopic mechanism 510 abuts against the side of the end plate 310 facing away from the mounting space 110.

[0064] In this way, while ensuring that the pressure on the solid-state battery pack 200 meets the requirements, the number of parts is reduced, which can reduce costs and assembly difficulty.

[0065] Or, such as Figures 1-3 As shown, end plates 310 are located on opposite sides of the mounting space 110 along the x-direction. The elastic element 400 is compressed between the two end plates 310. The telescopic mechanism 510 corresponding to each end plate 310 abuts against the side of the end plate 310 facing away from the mounting space 110.

[0066] In this way, the two end plates 310 apply pressure to the solid-state battery pack 200 from opposite sides along the x-direction, which can improve the pressure adjustment range, increase the controllability of pressure adjustment, and help ensure that the solid-state battery pack 200 is maintained within the high-efficiency operating range.

[0067] In some embodiments, such as Figure 2 and Figure 3 As shown, the end plate 310 is slidably connected to the housing 100 along the x-direction.

[0068] For example, the outer peripheral surface of the end plate 310 may have a slider, and the inner peripheral surface of the housing 100 may have a groove extending along the x-direction. The slider and the groove are slidably engaged, and the slider and the end plate 310 are integral structures, as are the groove and the housing 100. Alternatively, the outer peripheral surface of the end plate 310 may have a groove, and the inner peripheral surface of the housing 100 may have a slider extending along the x-direction. The slider and the groove are slidably engaged, and the groove and the end plate 310 are integral structures, as are the slider and the housing 100. Alternatively, the outer peripheral surface of the end plate 310 may be provided with a first sliding member, and the inner peripheral surface of the housing 100 may be provided with a second sliding member extending along the x-direction. The first sliding member and the second sliding member are slidably engaged, and the sliding member and the end plate 310 are separate structures, as are the second sliding member and the housing 100.

[0069] This restricts the direction of movement of the end plate 310, ensures that the relative position between the end plate 310 and the housing 100 is controllable, avoids the end plate 310 from being deflected by force, and thus ensures that the pressure applied by the end plate 310 to the solid-state battery pack 200 is uniform, which is beneficial to ensuring the working performance of each solid-state battery cell 210.

[0070] In some embodiments, such as Figure 1 and Figure 3 As shown, the solid-state battery module box 2 also includes a guide rod 410, which is slidably connected to the end plate 310. An elastic element 400 is sleeved on the guide rod 410, and the guide rod 410 extends in the x direction.

[0071] For example, the elastic element 400 can be a spring or a disc spring, and the disc spring can be nested on the guide rod 410 in a mating or overlapping manner. The length of the guide rod 410 can be determined according to the size of the solid-state battery pack 200. The longer the guide rod 410, the more disc springs can be arranged, and the greater the driving force of the elastic element 400.

[0072] By setting the guide rod 410, the relative position between the elastic element 400 and the end plate 310 can be fixed more reliably. When the elastic element 400 is compressed, the guide rod 410 can limit the shape of the elastic element 400, preventing the elastic element 400 from deforming mainly along its axial direction, and ensuring that the elastic element 400 mainly applies driving force to the end plate 310 in the x direction.

[0073] Furthermore, such as Figure 1 As shown, there are multiple guide rods 410, which are spaced apart circumferentially along the end plate 310. There are multiple elastic elements 400, which are correspondingly sleeved on the multiple guide rods 410. The guide rods 410 are at least located on opposite sides of the end plate 310 along the y-direction, and are perpendicular to the x-direction and y-direction.

[0074] This increases the overall driving force applied by the elastic element 400 to the end plate 310, while reducing the force on each elastic element 400, thus preventing excessive force on the elastic element 400 and deformation failure. In addition, multiple guide rods 410 can provide more reliable guidance for the movement of the end plate 310, which helps improve the reliability of the end plate 310 movement, prevents the end plate 310 from deflecting under force, and makes the force on the solid-state battery cell assembly 200 more uniform, which helps to ensure the working performance of each solid-state battery cell 210.

[0075] Furthermore, the end plate 310 has a protrusion 311 on the side facing the guide rod 410, the guide rod 410 is movably inserted into the protrusion 311, and the elastic member 400 is connected to the protrusion 311.

[0076] For example, the inner circumferential surface of the protrusion 311 may be provided with a keyway, and the outer circumferential surface of the guide rod 410 may be provided with a limiting key, which is inserted into the keyway and extends along the x-direction; or, the inner circumferential surface of the protrusion 311 may be provided with a limiting key, and the outer circumferential surface of the guide rod 410 may be provided with a limiting key, which is inserted into the keyway and extends along the x-direction. This prevents relative rotation between the guide rod 410 and the protrusion 311, thus helping to ensure the stability of the relative position between the guide rod 410 and the end plate 310.

[0077] In addition, the inner circumferential surface of the protrusion 311 may be provided with a first limiting protrusion, and the outer circumferential surface of the guide rod 410 may be provided with a second limiting protrusion. When the guide rod 410 moves to the extreme position within the protrusion 311, the first limiting protrusion and the second limiting protrusion abut against each other to prevent the guide rod 410 from disengaging from the protrusion 311 and to ensure the working performance of the solid-state battery module box 2.

[0078] By providing the protrusion 311, not only can the relative position between the end plate 310 and the guide rod 410 be defined, but the protrusion 311 can also abut against the elastic member 400. Without increasing the overall thickness of the end plate 310, the compression size of the elastic member 400 can be increased, which is beneficial for adjusting the pressure applied by the end plate 310 to the solid-state battery pack 200.

[0079] Furthermore, such as Figure 1 As shown, the telescopic mechanism 510 includes multiple telescopic members 511. The driving end of the telescopic member 511 abuts against the end plate 310. The telescopic member 511 is telescopic in the x direction. The multiple telescopic members 511 are spaced apart and are symmetrically arranged with respect to the center of the end plate 310.

[0080] In this way, on the one hand, the thrust exerted by the telescopic mechanism 510 on the end plate 310 is increased, and on the other hand, the thrust required by each telescopic component 511 is reduced, which lowers the material requirements for a single telescopic component 511 and increases the range of materials that can be selected for the telescopic component 511, thereby achieving the goal of meeting the thrust requirements while reducing costs. Furthermore, the symmetrical arrangement of multiple telescopic components 511 with respect to the center of the end plate 310 ensures uniform force distribution along the x-direction of the solid-state cell assembly 200, which is beneficial for ensuring the working performance of each solid-state cell 210.

[0081] This utility model also proposes a solid-state battery module 1, including the aforementioned solid-state battery module box 2 and solid-state battery cell assembly 200. The solid-state battery cell assembly 200 is disposed within the installation space 110, and the solid-state battery cell assembly 200 includes a plurality of solid-state battery cells 210, which can be connected in parallel or in series, and the plurality of solid-state battery cells 210 are arranged along the x-direction.

[0082] According to the solid-state battery module 1 of this embodiment, by utilizing the solid-state battery module box 2, the working performance can be improved and the service life can be extended.

[0083] In some embodiments, such as Figure 1 As shown, there are multiple solid-state battery cell groups 200, which are spaced apart, and the end plate 310 abuts against the multiple solid-state battery cell groups 200. Any two solid-state battery cell groups 200 can be connected in parallel or in series. The multiple solid-state battery cell groups 200 can also be arranged at intervals along the y-direction.

[0084] By setting up multiple solid-state battery cell groups 200, the energy storage capacity of the solid-state battery module 1 can be increased, thereby improving its range. Furthermore, the end plate 310 can simultaneously apply pressure to multiple solid-state battery cell groups 200, reducing the force on each individual cell group 200. This helps control the pressure on each cell group 200 to meet requirements and reduces the probability of damage due to excessive force.

[0085] For example, such as Figure 4 As shown, the solid-state battery cell 210 includes an aluminum-plastic film 211, an electrode assembly 212, a tab 213, and a tab adhesive 214. The electrode assembly 212 is disposed inside the aluminum-plastic film 211, the tab 213 is connected to the electrode assembly 212, and the tab 213 extends out from inside the aluminum-plastic film 211. The tab adhesive 214 is disposed at the connection between the tab 213 and the aluminum-plastic film 211. The electrode assembly 212 may include a positive electrode plate, a negative electrode plate, and a separator stacked together, with the separator located between the positive electrode plate and the negative electrode plate. The maximum working pressure of the solid-state battery cell 210 is set to P, and the force-bearing area of ​​the solid-state battery cell 210 is S, which is the projection of the solid-state battery cell 210 onto the end plate 310. Each solid-state battery cell group 200 has n solid-state battery cells 210, and the value of n can be 2 to 8. Under normal operating conditions, the maximum pressure exerted by the solid-state battery cell group 200 on the end plate 310 is F1. F1 = n × S × P is used to calculate the maximum load-bearing capacity F2 of the end plate 310. F2 ≥ F1, so as to ensure the stability and safety of the system.

[0086] In some embodiments, the solid-state battery cell assembly 200 further includes a buffer heat insulation pad, with at least one buffer heat insulation pad disposed between two adjacent solid-state battery cells 210. The material of the buffer heat insulation pad may include silicone or rubber. By providing a buffer heat insulation pad, on the one hand, heat exchange between adjacent solid-state battery cells 210 can be prevented, reducing the risk of heat propagation and thermal runaway in the solid-state battery cell assembly 200 and improving the safety of the solid-state battery module 1; on the other hand, the buffer heat insulation pad can undergo elastic deformation, absorbing a certain amount of volume change of the solid-state battery cells 210, and better adapting to the volume change of the solid-state battery cells 210 during charging and discharging.

[0087] This utility model also proposes a vehicle including the aforementioned solid-state battery module 1.

[0088] The vehicle according to this embodiment utilizes the aforementioned solid-state battery module 1, which improves performance and extends service life.

[0089] The above embodiments are merely preferred embodiments provided to fully illustrate the present utility model, and the protection scope of the present utility model is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present utility model are all within the protection scope of the present utility model.

[0090] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A solid-state battery module box, characterized by, include: Box (100); An end plate (310) is disposed within the housing (100) and is used to define an installation space (110) for mounting a solid-state battery pack (200), the end plate (310) being located on at least one side of the installation space (110) along the x-direction; An elastic element (400) is connected to the end plate (310), and the elastic element (400) has a spring force that drives the end plate (310) to move in the x direction away from the mounting space (110); A telescopic mechanism (510) abuts against the end plate (310), the telescopic mechanism (510) is telescopic in the x direction, and the telescopic mechanism (510) has a thrust that drives the end plate (310) to move in the x direction toward the mounting space (110).

2. The solid-state battery module box according to claim 1, characterized in that, The end plate (310) is slidably connected to the housing (100) along the x-direction.

3. The solid-state battery module box according to claim 1, characterized in that, The solid-state battery module box (2) also includes: The guide rod (410) is slidably connected to the end plate (310), and the elastic element (400) is sleeved on the guide rod (410).

4. The solid-state battery module box according to claim 3, characterized in that, There are multiple guide rods (410), and the multiple guide rods (410) are arranged at intervals along the circumference of the end plate (310); There are multiple elastic elements (400), and the multiple elastic elements (400) are correspondingly sleeved on the multiple guide rods (410).

5. The solid-state battery module box according to claim 4, characterized in that, The end plate (310) has a protrusion (311) on the side facing the guide rod (410), the guide rod (410) is movably inserted into the protrusion (311), and the elastic member (400) is connected to the protrusion (311).

6. The solid-state battery module box according to claim 1, characterized in that, The telescopic mechanism (510) includes a plurality of telescopic members (511), the driving end of the telescopic member (511) abuts against the end plate (310), the telescopic member (511) is telescopic in the x direction, the plurality of telescopic members (511) are spaced apart, and the plurality of telescopic members (511) are symmetrically arranged with respect to the center of the end plate (310).

7. The solid-state battery module box according to any one of claims 1-6, characterized in that, The end plate (310) is located on one side of the mounting space (110) along the x direction. The elastic element (400) and the mounting space (110) are located on the same side of the end plate (310). The elastic element (400) is compressed between the end plate (310) and the housing (100). The telescopic mechanism (510) abuts against the side of the end plate (310) facing away from the mounting space (110). Alternatively, the end plates (310) are disposed on opposite sides of the mounting space (110) along the x-direction, the elastic element (400) is compressed between the two end plates (310), and the telescopic mechanism (510) corresponding to each end plate (310) abuts against the side of the end plate (310) facing away from the mounting space (110).

8. A solid-state battery module, characterized in that, include: Solid-state battery module box (2) as described in any one of claims 1-7; A solid-state battery cell assembly (200) is disposed within the installation space (110). The solid-state battery cell assembly (200) includes a plurality of solid-state batteries (210), which are arranged along the x-direction.

9. The solid-state battery module according to claim 8, characterized in that, The solid-state battery pack (200) also includes a buffer heat insulation pad, and at least one buffer heat insulation pad is provided between two adjacent solid-state battery cells (210). And / or, there are multiple solid-state battery cells (200), the multiple solid-state battery cells (200) are spaced apart, and the end plate (310) abuts against the multiple solid-state battery cells (200).

10. A vehicle, characterized in that, Includes the solid-state battery module (1) as described in any one of claims 8-9.

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