Frame of battery pack, battery pack and vehicle

Abstract

The invention discloses a frame of a battery pack, the battery pack and a vehicle, and relates to the technical field of new energy. The frame comprises a boundary beam, an elastic body and a driving adjusting structure. The plurality of edge beams are connected in sequence, the plurality of edge beams are encircled to form a battery cell accommodating cavity, and an accommodating groove is formed in one side, facing the battery cell accommodating cavity, of at least one edge beam; one end of the elastic body is connected with the edge beam, and the other end of the elastic body is used for extruding the battery cell to adjust the expansion force of the battery cell; the drive adjusting structure is connected with the elastomer to adjust the expansion amount of the elastomer. According to the frame of the battery pack provided by the embodiment of the invention, the constraining force on the battery cell can be dynamically adjusted, the use reliability of the battery cell is ensured, and the use performance of the battery pack is further optimized.

Description

Technical Field

[0001] The present invention relates to the field of new energy technology, and in particular to a battery pack frame, a battery pack and a vehicle. Background Art

[0002] In the assembly process of the battery pack, one of the steps is to assemble the battery pack upside down, at which time the large surface of the battery cell is in an unconstrained state inside the battery pack. The commonly used solution is to provide the necessary constraints by injecting colloids or using foam materials. However, both methods have a problem throughout the service life of the battery pack: the constraints around the battery cell are not adjustable and cannot be monitored in real time. In the initial stage, the constraint force may be too small to effectively restrict the battery cell; when the battery cell expands, the constraint force becomes too large. Both situations may have an adverse effect on the cycle life of the battery cell.

[0003] Therefore, there is room for improvement in the frame of the battery pack. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the first aspect of the present invention aims to provide a battery pack frame, which can dynamically adjust the restraint force on the battery cell to ensure the reliability of the battery cell and thus optimize the performance of the battery pack.

[0005] A second aspect of the present invention is to provide a battery pack.

[0006] A third aspect of the present invention aims to provide a vehicle.

[0007] The frame of the battery pack according to the first embodiment of the present invention includes: side beams, an elastic body, and a drive adjustment structure. The side beams are multiple and connected in sequence, and the multiple side beams enclose a battery cell cavity, and at least one of the side beams is provided with a accommodating groove on the side facing the battery cell cavity; the elastic body is provided in the accommodating groove, one end of the elastic body is connected to the side beam, and the other end is used to squeeze the battery cell to adjust the expansion force of the battery cell; the drive adjustment structure is connected to the elastic body to adjust the expansion and contraction amount of the elastic body.

[0008] According to the framework of the embodiment of the first aspect of the present invention, side beams are provided as the basic structure of the framework. By connecting the side beams in sequence to form a battery cell cavity, a stable installation environment is provided for the battery cell. By providing a receiving groove on the side beam, space is provided for the installation of the elastomer. By providing the elastomer, dynamic constraints and adjustments are formed on the battery cell in the battery pack, and the expansion force of the battery cell is absorbed by the expansion deformation of the elastomer itself, thereby maintaining the stability and safety of the battery cell. By providing a driving adjustment structure, the expansion amount of the elastomer can be dynamically adjusted according to the actual state of the battery cell. By providing the driving adjustment structure, the constraint force of the elastomer on the battery cell can be controlled, which not only avoids the problem that the initial constraint force is too small, resulting in the battery cell being unable to be effectively constrained, but also prevents the battery cell from being damaged by excessive constraint force after the battery cell expands. This dynamic adjustment capability not only improves the cycle life of the battery cell, but also enhances the overall performance and reliability of the battery pack.

[0009] The frame of the battery pack according to some embodiments of the present invention further includes: a push plate, which is connected to one end of the elastic body facing the battery cell cavity, and the elastic body is pressed onto the battery cell through the push plate.

[0010] In some optional embodiments, the frame of the battery pack further includes: a guide structure connected between the push plate and the side beam.

[0011] Optionally, the guide structure includes: a linear motion bearing.

[0012] In some optional embodiments, there are at least two linear motion bearings, and at least two of the linear motion bearings are arranged at intervals along the height direction of the frame, and the elastomer is located between the at least two linear motion bearings.

[0013] In some optional embodiments, the elastic body has a shortest position, and when the push plate is in the shortest position, the push plate is located in the receiving groove, and the side beam and the push plate are flush on a side facing the battery cell cavity.

[0014] According to some embodiments of the present invention, the frame of the battery pack further includes: a pressure sensor for detecting the pressure exerted by the elastic body on the battery cell, wherein the pressure sensor is electrically connected to the driving adjustment structure.

[0015] In some optional embodiments, the elastic body includes an air spring, and the pressure sensor is disposed inside the air spring, or at an air interface of the air spring.

[0016] According to the frame of the battery pack of some embodiments of the present invention, the elastomer includes an air spring; the drive adjustment structure includes: an air channel and a control valve formed in the side beam, the air channel is connected to the air interface of the air spring; the control valve is connected to the air channel.

[0017] In some optional embodiments, the control valve includes a constant pressure valve; or, the drive adjustment structure further includes a controller, and the control valve includes at least one of an inflation valve and a pressure relief valve.

[0018] In some optional embodiments, among the multiple side beams, some of the side beams are provided with the accommodating groove and the air duct, and some of the side beams are provided with the control valve; the driving adjustment structure also includes: an air pipe, one end of the air pipe is connected to the air duct, and the other end is connected to the control valve.

[0019] In the frame of the battery pack according to some embodiments of the present invention, the side beam is a profiled member, and the accommodating groove is a cavity integrally formed on the side beam.

[0020] A battery pack according to an embodiment of the second aspect of the present invention comprises: a frame and a battery cell, wherein the frame is the frame of the battery pack described in the embodiment of the first aspect of the present application; and the battery cell is disposed in the battery cell cavity.

[0021] The vehicle according to the third aspect of the present invention comprises the battery pack according to the second aspect of the present invention.

[0022] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0024] Figure 1 An exploded view of a battery pack according to some embodiments of the present invention;

[0025] Figure 2 An exploded view of a framework of some embodiments of the present invention;

[0026] Figure 3 It is a schematic diagram of the structure of the framework of some embodiments of the present invention;

[0027] Figure 4 Schematic diagram of the position of the push plate of some embodiments of the present invention (when the elastic body is in the shortest position);

[0028] Figure 5 Schematic diagram of the position of the air spring in the receiving groove according to some embodiments of the present invention.

[0029] Reference numerals:

[0030] Battery Pack 1000,

[0031] Frame 100, side beam 10, battery cell cavity 101, accommodating groove 102, elastic body 20, air spring 22, air interface 221, drive adjustment structure 30, airway 31, control valve 32, air pipe 33, push plate 40, guide structure 50, linear motion bearing 51, bearing seat 511, sliding column 512, pressure sensor 60, air supply unit 70,

[0032] Battery cells 200. DETAILED DESCRIPTION

[0033] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0034] In the description of the present invention, it should be understood that the terms "height", "up", "down", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation and be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0035] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] The disclosure below provides many different embodiments or examples to implement different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplicity and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides various specific examples of processes and materials, but those of ordinary skill in the art can appreciate the applicability of other processes and / or the use of other materials.

[0037] Reference below Figure 1-Figure 5 A frame 100 of a battery pack according to an embodiment of a first aspect of the present invention is described.

[0038] Combination Figure 1 and Figure 2 The frame 100 of the battery pack includes: a side beam 10, an elastic body 20 and a drive adjustment structure 30.

[0039] There are multiple side beams 10 connected in sequence, and the multiple side beams 10 enclose a battery cell cavity 101 . At least one side beam 10 is provided with a receiving groove 102 on a side facing the battery cell cavity 101 .

[0040] The battery cell cavity 101 formed by the side beams 10 is used to accommodate and protect the battery cell 200. The side beams 10 are provided to not only improve the structural strength of the battery pack 1000, but also effectively prevent the battery cell 200 from being damaged when impacted by external forces.

[0041] The elastic body 20 is disposed in the receiving groove 102, one end of the elastic body 20 is connected to the side beam 10, and the other end is used to squeeze the battery cell 200 to adjust the expansion force of the battery cell 200. Here, connecting one end of the elastic body 20 to the side beam 10 can ensure the stable connection between the elastic body 20 and the side beam 10, and will not accidentally move or fall off, providing stable support for the battery cell 200. In addition, the elastic body 20 also plays a role in buffering and shock absorption, protecting the battery cell 200 from damage caused by direct impact or vibration.

[0042] The elastic body 20 and the side beam 10 may be connected by welding, screwing, bonding or other connection methods to ensure the firmness and durability of the connection.

[0043] Optionally, the elastic body 20 may be an airbag, a spring or other elastically deformable structure that can deform under the action of external force and maintain or restore to the original state through its own elastic restoring force, thereby adjusting and supporting the state of the battery cell 200.

[0044] The driving adjustment structure 30 is connected to the elastic body 20 to adjust the expansion and contraction amount of the elastic body 20 .

[0045] The driving adjustment structure 30 is used to control the expansion and contraction amount of the elastic body 20 , thereby achieving fine adjustment of the state of the battery cell 200 .

[0046] It is worth noting that during the battery charging and discharging process, the battery cell 200 may expand in volume due to internal chemical reactions. During this process, the available space in the battery cell cavity 101 will be reduced accordingly, causing the battery cell 200 to exert pressure on the surrounding elastic body 20 .

[0047] At this time, the driving adjustment structure 30 releases part of the space in the battery cell cavity 101 by reducing the expansion and contraction of the elastic body 20, thereby reserving more space for the battery cell 200 to expand, preventing the battery cell 200 from being deformed or damaged due to excessive pressure. At the same time, it also ensures the stability and safety of the battery cell 200 inside the battery pack 1000.

[0048] When the battery completes its charge and discharge cycle and returns to normal, the chemical reaction inside the battery cell 200 tends to balance, and its volume will return to its initial size accordingly. During this transition, the available space in the battery cell cavity 101 will increase, and a certain gap may appear between the battery cell 200 and the side beam that were originally tightly fitted. The existence of this gap may cause the battery cell 200 to shake slightly in the cavity, thereby affecting the electrical connection stability between the battery cell 200 and other components in the battery pack 1000.

[0049] At this time, the driving adjustment structure 30 can adjust the gap between the battery cell 200 and the side beam by increasing the expansion and contraction amount of the elastic body 20 to ensure that the battery cell 200 maintains a stable position in the cavity.

[0050] Therefore, through the synergistic effect of the driving adjustment structure 30 and the elastomer 20 , the battery pack 1000 can better adapt to the volume change of the battery cell 200 during the charging and discharging process, thereby extending the service life of the battery and improving the reliability and performance of the battery pack 1000 .

[0051] Optionally, when the elastic body 20 is an airbag, the driving and adjusting structure 30 may be a cylinder, which drives the expansion and contraction of the airbag through changes in air pressure.

[0052] In some optional embodiments, when the elastic body 20 is a spring member, the drive adjustment structure 30 may include a drive motor and a ball screw. Specifically, the drive motor, as a power source, can output corresponding torque and speed. This torque and speed are converted into linear motion by the ball screw, thereby pushing the spring member to expand and contract. The setting of the ball screw can reduce friction and wear, and also help to improve the accuracy and efficiency of the transmission, so that the expansion and contraction amount of the spring member can be very accurately controlled.

[0053] Alternatively, the drive adjustment structure 30 may include an electromagnetic driver, which utilizes electromagnetic force to directly act on the elastic body 20 to achieve rapid and precise control of its expansion and contraction amount.

[0054] Optionally, the frame 100 has two side beams 10 on opposite sides provided with accommodating grooves 102, and the elastic body 20 is provided at the accommodating grooves 102. By means of this opposite side clamping method, the expansion and contraction of the battery cell 200 can be more quickly controlled and adjusted, thereby improving the stability of the battery cell 200 and the overall performance of the battery pack 1000. At the same time, the battery cell 200 can also obtain the clamping force of the elastic body 20 on both sides, making the force more balanced and stable.

[0055] like Figure 2-Figure 5 As shown, the frame 100 according to the embodiment of the present invention further includes: a push plate 40 , which is connected to one end of the elastic body 20 facing the battery cell cavity 101 , and the elastic body 20 is pressed onto the battery cell 200 through the push plate 40 .

[0056] The function of the push plate 40 is to ensure that the force of the elastic body 20 can be evenly and stably applied to the entire surface of the battery cell 200 by increasing the contact area with the surface of the battery cell 200 .

[0057] Optionally, the shape and size of the push plate 40 are configured to match the shape and size of the surface of the battery cell 200 in contact. In this way, when the elastic body 20 applies pressure to the push plate 40, the push plate 40 can fit tightly and evenly on the surface of the battery cell 200, thereby avoiding the problem of excessive or insufficient pressure caused by uneven local pressure. This uniform pressure distribution helps to reduce the deformation of the battery cell 200 caused by thermal expansion or mechanical stress during the charging and discharging process, thereby protecting the structural integrity of the battery cell 200 and extending its service life.

[0058] The connection method between the push plate 40 and the elastic body 20 includes, but is not limited to, welding, gluing or other fastening means, which can be determined according to actual needs and are not limited in this application.

[0059] In some optional embodiments, combined with Figure 2 and Figure 3 The frame 100 of the battery pack further includes: a guide structure 50 connected between the push plate 40 and the side beam 10 .

[0060] Here, the guide structure 50 provides a reliable moving track for the push plate 40. During the expansion and contraction of the elastic body 20, the guide structure 50 can ensure that the push plate 40 moves along the preset track to avoid unstable support caused by deviation or shaking. This precise position control allows the push plate 40 to always fit closely on the surface of the battery cell 200, providing a uniform and stable support force for the battery cell 200.

[0061] Optionally, the guide structure 50 includes a slider and a slide rail. The slider and the slide rail cooperate with each other to ensure that the elastic body 20 can move smoothly along a predetermined path and maintain an accurate position during the expansion and contraction process.

[0062] Specifically, the slider is provided on one of the push plate 40 and the side beam 10 , and the slide rail is provided on the other.

[0063] For example, the slider is provided on the push plate 40, and the slide rail is formed on the side beam 10. When the push plate 40 is pushed and extended by the elastic body 20, the slider moves smoothly along the slide rail. In this process, the close fit and precise guidance between the slider and the slide rail ensure that the push plate 40 can always move along the predetermined path to avoid deviation or shaking, thereby providing uniform support force for the battery cell 200 and enhancing the reliability of the battery pack 1000.

[0064] In some other optional embodiments, see Figure 2 and Figure 3 The guide structure 50 includes: a linear motion bearing 51.

[0065] First, the linear motion bearing 51 as a part of the guide structure 50 can ensure that the elastic body 20 moves stably and accurately along the linear direction. In addition, the rolling contact of the bearing can reduce or even eliminate the vibration generated during the guidance, thereby improving the stability of the movement of the push plate 40.

[0066] Secondly, the linear motion bearing 51 has good wear resistance and durability, and can maintain stable performance in long-term, high-frequency linear motion. This makes the linear motion bearing 51 have a longer service life and lower maintenance cost in the guide structure 50, thereby improving the reliability of the battery pack 1000.

[0067] In some specific embodiments, Figure 5 As shown, the linear motion bearing 51 includes a bearing seat 511 and a sliding column 512. The bearing seat 511 includes a guide hole, and the sliding column 512 is slidably arranged in the guide hole. One end of the sliding column 512 is connected to the push plate 40.

[0068] By providing the linear motion bearing 51, the motion accuracy of the push plate 40 can be improved, because the linear motion bearing 51 can ensure that the push plate 40 slides smoothly and accurately along the predetermined track (i.e., the direction perpendicular to the side of the battery cell 200) during the movement, reducing unnecessary deviation and shaking. At the same time, this design also greatly enhances the stability of the movement of the push plate 40, so that the push plate 40 can maintain a constant speed and force when pushing or adjusting the position of the battery cell 200, avoiding the problem of damage to the battery cell 200 or uneven support force caused by unstable movement, thereby ensuring the reliability of the battery cell 200.

[0069] In some optional embodiments, combined with Figure 2There are at least two linear motion bearings 51 , and the at least two linear motion bearings 51 are arranged at intervals along the height direction of the frame 100 , and the elastic body 20 is located between the at least two linear motion bearings 51 .

[0070] In the above technical solution, the elastic body 20 is arranged between two linear motion bearings 51, so as to ensure that when the elastic body 20 drives the push plate 40 to move, the two ends of the push plate 40 can maintain a consistent moving speed and distance, avoid the offset or distortion of the push plate 40 due to uneven displacement, and thus apply a uniform supporting force to the side of the battery cell 200. This uniform supporting force can effectively prevent problems such as deformation, damage or performance degradation of the battery cell 200 that may be caused by uneven supporting force. Therefore, this technical solution not only helps to maintain the stability and reliability of the movement of the push plate 40, but also helps to ensure the safety and stability of the battery cell 200 in the battery pack 1000, thereby extending the service life of the battery cell 200.

[0071] In some optional embodiments, referring to Figure 3 and Figure 4 The elastic body 20 has a shortest position. When in the shortest position, the push plate 40 is located in the receiving groove 102 , and the side beam 10 and the push plate 40 are flush on the side facing the battery cell cavity 101 .

[0072] With this arrangement, when the battery cell 200 expands due to the charging and discharging process, the push plate 40 will retract in time and fit tightly against the side beam 10, ensuring that the side wall of the battery cell 200 always obtains a flat and continuous support surface during the expansion period, thereby effectively avoiding deformation, damage and even safety risks of the battery cell 200 that may be caused by uneven support. By constructing the side beam 10 and the push plate 40 to be flush on one side of the battery cell cavity 101, a flat support surface is constructed for the battery cell 200, and this flat support surface can evenly disperse the pressure generated by the expansion of the battery cell 200 and prevent excessive local support stress.

[0073] Secondly, such a configuration also facilitates the installation and maintenance of the battery cell 200 to a certain extent. Since the side beam 10 and the push plate 40 are on the same plane, the battery cell 200 can be inserted or removed more easily, thereby reducing the difficulty of operation and time cost.

[0074] like Figure 1 and Figure 3 As shown, the frame 100 according to some embodiments of the present invention further includes: a pressure sensor 60 for detecting the pressure exerted by the elastic body 20 on the battery cell 200 , and the pressure sensor 60 is electrically connected to the driving adjustment structure 30 .

[0075] Specifically, the pressure sensor 60 is electrically connected to the driving adjustment structure 30. When the battery cell 200 is placed in the side beam 10 and supported by the elastic body 20, the pressure sensor 60 monitors the pressure exerted by the elastic body 20 on the battery cell 200 in real time.

[0076] Once the pressure detected by the pressure sensor 60 reaches a preset value, it transmits a signal to the pressure monitoring control unit. After receiving the signal, the control unit immediately issues an instruction to prohibit the elastic body 20 from extending toward the battery cell 200. In this way, it is ensured that the battery cell 200 is subjected to appropriate preload after expansion, avoiding deformation, damage or performance degradation of the battery cell 200 due to excessive pressure.

[0077] In some optional embodiments, such as Figure 3 and Figure 5 As shown, the elastic body 20 includes an air spring 22 , and the pressure sensor 60 is arranged in the air spring 22 , or at an air interface 221 of the air spring 22 .

[0078] Optionally, the air spring 22 includes a rubber bag structure. The air spring 22 realizes the elastic expansion and contraction function by inflating and deflating the rubber bag. Since the air spring 22 has good elastic properties, it can withstand a certain load. This property enables the air spring 22 to provide a stable and reliable support force for the battery cell 200.

[0079] Optionally, the expansion and contraction state of the air spring 22 can be achieved by changing the volume of the air chamber in the rubber bag, so that the expansion and contraction degree of the air spring 22 can be changed accordingly to adapt to the different expansion volumes of the battery cell 200 in different states.

[0080] At the same time, the air spring 22 also has a certain vibration absorption capability. When subjected to external vibration or impact, the air spring 22 can effectively absorb and disperse the vibration energy by virtue of its internal elastic medium (e.g., air or nitrogen) and rubber bag structure. This vibration absorption characteristic not only helps to protect the battery cell 200 from external interference, but also improves the stability and durability of the battery cell 200 in the battery cell cavity 101, thereby ensuring that the battery pack 1000 maintains stable operation under various road conditions.

[0081] In some embodiments, a linear motion bearing 51 is provided on the air spring 22. Such a configuration can improve the movement accuracy of the air spring 22 and ensure that the air spring 22 can be extended and retracted strictly in a preset direction.

[0082] When the pressure sensor 60 is directly installed inside the air spring 22, it can directly sense the pressure change of the medium inside the spring. When the battery cell 200 expands due to charging and discharging or temperature changes, it will squeeze the air spring 22, causing the pressure inside the air spring 22 to rise. The pressure sensor 60 can sense and capture this pressure change, and then convert it into an electrical signal for transmission. When the system receives this electrical signal, it can respond quickly and take predetermined measures, such as reducing the air chamber volume of the air spring 22 by deflating, so as to flexibly adapt to the expansion state of the battery cell 200.

[0083] Alternatively, the pressure sensor 60 may be disposed at the air interface 221 of the air spring 22 , so that the pressure sensor 60 can accurately monitor the air pressure change inside the air spring 22 .

[0084] When the volume of the battery cell 200 changes, it will correspondingly affect the air chamber volume of the air spring 22, and then the air pressure inside the air spring 22 will change. This change will be captured by the pressure sensor 60 set at the air interface 221 and can be converted into a corresponding electrical signal. The system can change the air chamber volume of the air spring 22 according to the feedback of the electrical signal to adapt to the change in the volume of the battery cell 200.

[0085] In addition, arranging the pressure sensor 60 at the gas interface 221 also facilitates maintenance, replacement or calibration thereof when necessary, thereby simplifying the maintenance process.

[0086] In some optional embodiments, the elastic body 20 includes an air spring 22. Figure 1 , Figure 2 and Figure 5 The driving adjustment structure 30 includes: an air passage 31 and a control valve 32. The air passage 31 is formed in the side beam 10, and the air passage 31 is connected to the air interface 221 of the air spring 22. The control valve 32 is connected to the air passage 31.

[0087] First, forming the air channel 31 in the side beam 10 can ensure efficient flow of gas between the control valve 32 and the gas interface 221, reduce bends and resistance, and improve the response speed to system instructions so as to adjust the air chamber volume in time.

[0088] Secondly, the air duct 31 needs to withstand frequent gas flow and possible vibrations, so directly forming the air duct 31 in the side beam 10 can improve its durability and reliability to ensure stability in long-term use.

[0089] The control valve 32 is responsible for adjusting the opening and closing degree of the air passage 31 according to the control instruction, thereby controlling the amount of gas entering or exhausting the air spring 22 to achieve the purpose of regulating the air pressure.

[0090] Therefore, in practical applications, the air passage 31 and the control valve 32 work together to achieve precise adjustment of the air pressure of the air spring 22. When the air pressure of the air spring 22 needs to be adjusted, the control system sends a command to the control valve 32, and the control valve 32 adjusts the opening and closing degree of the air passage 31 according to the command, thereby changing the amount of gas entering or exhausting the air spring 22. The air passage 31 ensures that the gas can flow efficiently between the control valve 32 and the air spring 22, thereby achieving rapid adjustment of the air pressure.

[0091] In some optional embodiments, the control valve 32 includes a constant pressure valve.

[0092] The constant pressure valve is used to maintain a constant pressure in the system. First, the required pressure value is set. When the pressure is lower than the set value, the constant pressure valve will open to allow gas to enter to supplement the pressure; when the system pressure exceeds the set value, the constant pressure valve will close to prevent further pressure increase. By keeping the pressure constant, it helps to reduce system fluctuations and instability factors, thereby improving the stability and reliability of the entire system.

[0093] Alternatively, the driving adjustment structure 30 further includes a controller, and the control valve 32 includes at least one of an inflation valve and a pressure relief valve.

[0094] Specifically, the controller receives a feedback signal from the pressure sensor 60 and outputs a corresponding control instruction to the control valve 32 .

[0095] When the controller receives that the internal air pressure of the air spring 22 is lower than the set value, it will issue a command to open the inflation valve, allowing gas from the external air source to enter the air spring 22 to replenish the air pressure. The opening degree and duration of the inflation valve are controlled by the controller according to actual needs.

[0096] When the controller detects that the internal air pressure of the air spring 22 exceeds the set value, the controller will issue a command to open the pressure relief valve, allowing gas to be discharged from the air spring 22 to reduce the air pressure. Similarly, the opening degree and duration of the pressure relief valve can also be controlled by the controller.

[0097] According to the frame 100 of some embodiments of the present invention, among the multiple side beams 10, some side beams 10 are provided with a receiving groove 102 and an air channel 31, and some side beams 10 are provided with a control valve 32. This arrangement can optimize the spatial layout and help to achieve precise control of gas flow.

[0098] Specifically, a portion of the side beams 10 is provided with receiving grooves 102. These receiving grooves 102 may have specific shapes and sizes to install and fix other components, such as the air spring 22, the pressure sensor 60, etc. The provision of the receiving grooves 102 ensures that these components can be stably and firmly installed on the side beams 10, while reducing the occupied space, making the structure of the battery pack 1000 more compact.

[0099] An air passage 31 is configured on the side beam 10 at the same position as the receiving groove 102. Since the air passage 31 is used for gas flow, it allows the gas to flow freely inside the side beam 10 or between the side beams 10. Optionally, the air passage 31 is configured as a continuous and smooth channel to reduce resistance during gas flow and ensure that the gas can smoothly reach the control valve 32 or other target positions.

[0100] A control valve 32 is installed on another part of the side beam 10. The control valve 32 is used to control the flow rate and / or flow rate of the gas. By adjusting the opening and closing state of the control valve 32, the time when the gas enters or leaves the air spring 22 can be accurately controlled, thereby achieving accurate regulation of the air pressure.

[0101] See also Figure 2 The driving and adjusting structure 30 also includes: an air pipe 33 .

[0102] Optionally, the air pipe 33 is made of high-strength, corrosion-resistant material to ensure good air tightness and durability during long-term use.

[0103] One end of the air pipe 33 is connected to the airway 31 to ensure that the gas can smoothly enter the airway 31 from the air pipe 33.

[0104] The other end is connected to a control valve 32. By adjusting the control valve 32, the flow rate and / or flow velocity of the gas can be accurately controlled.

[0105] In some optional embodiments, the control valve 32 on the side beam 10 independently controls the air passage 31 on a portion of the side beam 10 .

[0106] This is because the gap between the side beam 10 and the side of the battery cell 200 may be different due to assembly and material tolerance, and the support force required on different sides of the battery cell 200 may be different. The embodiment of the present invention also adopts a more sophisticated control strategy. Specifically, the elastic bodies 20 on different sides of the side beam 10 are controlled by separate control valves 32. In this way, even if the gap sizes on different sides are different, the preload forces generated by the air springs 22 on different sides can be ensured to be the same by adjusting the inflation amount of the air springs 22 on different sides.

[0107] In some optional embodiments, the control valve 32 is a solenoid control valve 32 .

[0108] According to some Figure 4 In the illustrated embodiment, the frame 100 of the battery pack further includes an air supply unit 70 . The air supply unit 70 is connected to the control valve 32 via an air pipe 33 .

[0109] In the frame 100 according to some embodiments of the present invention, the side beam 10 is a profiled member, and the receiving groove 102 is a cavity integrally formed on the side beam 10 .

[0110] This arrangement means that the receiving groove 102 and the side beam 10 are part of the integral structure, rather than being formed by additional processing. On the one hand, it can simplify the manufacturing process, improve the connection strength between the receiving groove 102 and the side beam 10, and ensure the stability and reliability of the components during installation and fixing.

[0111] Secondly, by forming the receiving groove 102 as a cavity integrally formed on the side beam 10, the internal space of the side beam 10 can be fully utilized, reducing or even avoiding the extra space occupation, making the overall structure more compact, improving the space utilization, and making the layout of these components more reasonable.

[0112] The battery pack 1000 according to the second embodiment of the present invention comprises a frame 100 and a battery cell 200. The frame 100 is the frame 100 of the battery pack according to the first embodiment of the present invention. The battery cell 200 is disposed in a battery cell cavity 101.

[0113] By adopting the frame 100 of the above embodiment, the stability of the battery cell 200 in the battery pack 1000 can be improved, ensuring that the battery cell 200 is subjected to a constant and appropriate restraining force throughout the entire life cycle, thereby effectively ensuring the cycle performance of the battery cell 200.

[0114] The vehicle according to the embodiment of the third aspect of the present invention comprises the battery pack 1000 according to the embodiment of the second aspect of the present invention.

[0115] It is worth noting that the vehicle can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. The vehicle is provided with a battery pack 1000, and the battery pack 1000 can be arranged at the bottom, head or tail of the vehicle. The battery pack 1000 can be used to power the vehicle, for example, the battery pack 1000 can be used as an operating power source for the vehicle. The vehicle may also include a control system and a motor, and the control system is used to control the battery pack 1000 to power the motor, for example, for the starting, navigation and working power requirements of the vehicle during driving. In some embodiments of the present application, the battery pack 1000 can be used not only as the operating power source of the vehicle, but also as the driving power source of the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0116] By adopting the battery pack 1000 of the above embodiment, the reliability and stability of vehicle use can be improved.

[0117] Reference below Figure 1 - Figure 5The frame 100 of the battery pack according to the embodiment of the present invention is described in detail with a specific embodiment. It is worth noting that the following description is only for illustrative purposes and is not a specific limitation to the present invention.

[0118] Reference Figure 1 and Figure 2 The frame 100 of the battery pack includes: a side beam 10, an elastic body 20, a driving adjustment structure 30, a push plate 40, a guide structure 50, a pressure sensor 60 and an air supply unit 70.

[0119] The side beams 10 are multiple and connected in sequence, and the multiple side beams 10 enclose a battery cell cavity 101 .

[0120] A receiving groove 102 is provided on part of the side beam 10. The side beam 10 is a molded part, and the receiving groove 102 is a cavity formed integrally on the side beam 10.

[0121] At least one side beam 10 is provided with a receiving groove 102 on a side facing the battery cell receiving cavity 101 .

[0122] The elastic body 20 is disposed in the receiving groove 102 , one end of the elastic body 20 is connected to the side beam 10 , and the other end is used to squeeze the battery cell 200 to adjust the expansion force of the battery cell 200 .

[0123] The driving adjustment structure 30 is connected to the elastic body 20 to adjust the expansion and contraction amount of the elastic body 20 .

[0124] Reference Figure 3 The push plate 40 is connected to one end of the elastic body 20 facing the battery cell cavity 101 , and the elastic body 20 is pressed onto the battery cell 200 through the push plate 40 .

[0125] The guide structure 50 is connected between the push plate 40 and the side beam 10 . The guide structure 50 includes a linear motion bearing 51 .

[0126] There are two linear motion bearings 51 , which are arranged at intervals along the height direction of the frame 100 , and the elastic body 20 is located between at least two linear motion bearings 51 .

[0127] Reference Figure 4 The elastic body 20 has a shortest position. When in the shortest position, the push plate 40 is located in the receiving groove 102 , and the side beam 10 and the push plate 40 are flush on the side facing the battery cell cavity 101 .

[0128] Reference Figure 3 The pressure sensor 60 is used to detect the pressure exerted by the elastic body 20 on the battery cell 200. The pressure sensor 60 is electrically connected to the driving adjustment structure 30.

[0129] Reference Figure 5 The elastic body 20 includes: an air spring 22 .

[0130] The air spring 22 includes an air interface 221 . The pressure sensor 60 is disposed at the air interface 221 of the air spring 22 .

[0131] Reference Figure 2 and Figure 5 The driving and regulating structure 30 includes: an air channel 31 , a control valve 32 and an air pipe 33 .

[0132] The air passage 31 is formed in the side beam 10 where the accommodating groove 102 is located, and the air passage 31 is connected to the air interface 221 of the air spring 22 .

[0133] The control valve 32 is disposed in another portion of the side beam 10, and the control valve 32 is connected to the air passage 31. The control valve 32 includes a constant pressure valve.

[0134] One end of the air pipe 33 is connected to the air passage 31 , and the other end is connected to the control valve 32 .

[0135] Reference Figure 1 and Figure 4 The air supply unit 70 and the control valve 32 are connected via an air pipe 33 .

[0136] Other components of the frame 100 of the battery pack according to the embodiment of the present invention, such as the battery pack 1000 and the vehicle, as well as operations, are known to those skilled in the art and will not be described in detail herein.

[0137] In the description of this specification, the description with reference to the terms "embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0138] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery pack frame, characterized in that: include: Side beams, wherein the side beams are multiple and connected in sequence, and the multiple side beams enclose a battery cell cavity, and at least one of the side beams is provided with a accommodating groove on a side facing the battery cell cavity; An elastic body, wherein the elastic body is arranged in the accommodating groove, one end of the elastic body is connected to the side beam, and the other end is used to squeeze the battery cell to adjust the expansion force of the battery cell; A driving adjustment structure is connected to the elastic body to adjust the expansion and contraction amount of the elastic body.

2. The frame of the battery pack according to claim 1, characterized in that: Also includes: A push plate is connected to one end of the elastic body facing the battery cell cavity, and the elastic body is pressed onto the battery cell through the push plate.

3. The frame of the battery pack according to claim 2, characterized in that: Also includes: A guide structure is connected between the push plate and the side beam.

4. The frame of the battery pack according to claim 3, characterized in that: The guide structure includes: a linear motion bearing.

5. The frame of the battery pack according to claim 4, characterized in that: There are at least two linear motion bearings, and the at least two linear motion bearings are arranged at intervals along the height direction of the frame, and the elastomer is located between the at least two linear motion bearings.

6. The frame of the battery pack according to claim 2, characterized in that: The elastic body has a shortest position. When the push plate is in the shortest position, the push plate is located in the accommodating groove, and the side beam and the push plate are flush on a side facing the battery cell cavity.

7. The frame of the battery pack according to claim 1, characterized in that: Also includes: A pressure sensor for detecting the pressure exerted by the elastic body on the battery core, wherein the pressure sensor is electrically connected to the driving adjustment structure.

8. The frame of the battery pack according to claim 7, characterized in that: The elastic body comprises an air spring, and the pressure sensor is arranged in the air spring or at an air interface of the air spring.

9. The frame of the battery pack according to any one of claims 1 to 7, characterized in that: The elastic body comprises an air spring; The driving adjustment structure comprises: An air passage formed in the side beam, the air passage being connected to an air interface of the air spring; A control valve is connected to the air passage.

10. The frame of the battery pack according to claim 9, characterized in that: The control valve comprises a constant pressure valve; Alternatively, the drive adjustment structure further includes a controller, and the control valve includes at least one of an inflation valve and a pressure relief valve.

11. The frame of the battery pack according to claim 9, characterized in that: Among the plurality of side beams, some of the side beams are provided with the accommodating groove and the air passage, and some of the side beams are provided with the control valve; The driving and regulating structure further comprises an air pipe, one end of which is connected to the airway, and the other end of which is connected to the control valve.

12. The frame of the battery pack according to any one of claims 1 to 8, characterized in that: The side beam is a profiled part, and the accommodating groove is a cavity integrally formed on the side beam.

13. A battery pack, characterized in that: include: A frame, wherein the frame is a frame of a battery pack according to any one of claims 1 to 12; A battery cell is arranged in the battery cell cavity.

14. A vehicle, characterized in that: Comprising the battery pack according to claim 13.

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