Filling assembly for battery pack, battery pack and vehicle

Abstract

The invention discloses a filling assembly for a battery pack, the battery pack and a vehicle, the filling assembly for the battery pack comprises a filling piece and a constraint releasing structure, the filling piece is suitable for being arranged between a frame and a battery cell group, and the filling piece has a compressed state and an expanded state; the constraint relieving structure is connected with the filling piece and suitable for damaging the filling structure to enable the filling piece to be converted into an expansion state from a compressed state, and when the filling piece is in the expansion state, the filling piece abuts against the frame. Therefore, after the battery pack is assembled, the filling piece can be converted from the compressed state to the expanded state to fill the gap between the frame and the battery cell group, so that the internal parts of the battery pack are prevented from being displaced or damaged due to vibration or collision in the transportation or use process, and the safety of the whole battery system is improved by effectively filling the gap. The arrangement of the constraint relieving structure facilitates the completion of state conversion of the filling piece, and the constraint relieving structure can be automatically activated according to preset conditions, so that the filling piece can timely expand and play a role.

Description

Technical Field

[0001] The present invention relates to the technical field of battery packs, and in particular to a filling assembly for a battery pack, a battery pack and a vehicle. Background Art

[0002] In the prior art, a battery pack includes a battery box and a battery module. In order to enable the box to continuously apply preload to the battery module, the size of the box is usually designed to be equivalent to the size of the battery module or slightly larger than the size of the battery module. However, during the assembly of the battery pack, since both the box and the battery module are rigid structures with low elastic deformation capacity, the assembly of the battery pack is very difficult, and it is difficult to insert the battery module into the box by manpower. If the size of the box is designed to be too large, the battery module is prone to shaking when it is hit, resulting in poor safety and reliability of the battery pack. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a filling assembly for a battery pack, which is convenient for assembling the battery pack and also convenient for improving the structural stability of the battery pack.

[0004] A second object of the present invention is to provide a battery pack, comprising the filling assembly for the battery pack described in the above embodiment.

[0005] A third object of the present invention is to provide a vehicle comprising the battery pack described in the above embodiment.

[0006] According to the first aspect of the present invention, a filling assembly for a battery pack includes: a filling piece and a constraint release structure, wherein the filling piece is suitable for being arranged between a vehicle frame and a battery cell group, and the filling piece has a compressed state and an expanded state; the constraint release structure is connected to the filling piece, and the constraint release structure is suitable for destroying the filling assembly to change the filling piece from the compressed state to the expanded state, and when the filling piece is in the expanded state, the filling piece abuts against the frame.

[0007] According to the filling component for the battery pack of the embodiment of the present invention, when the filling component is in a compressed state, it is convenient to assemble the filling component with the battery pack. After the battery pack is assembled, the filling piece can be converted from a compressed state to an expanded state to fill the gap between the frame and the battery cell group, preventing the internal components of the battery pack from being displaced or damaged due to vibration or collision during transportation or use. By effectively filling the gap, the shaking of the battery cell and the like can be reduced, and the risk of damage caused by friction or impact can be reduced, thereby improving the safety of the entire battery system. The setting of the constraint release structure facilitates the state conversion of the filling piece, and the constraint release structure can be automatically activated according to preset conditions, so that the filling piece can expand and play a role in time.

[0008] In some embodiments, the filling member includes: a first packaging part and a second packaging part, the second packaging part is arranged on at least one side of the first packaging part, the first packaging part and the second packaging part are connected, and the thickness of the second packaging part is less than or equal to the thickness of the first packaging part.

[0009] In some embodiments, the filling piece further includes: a constraining portion connected to the second packaging portion and the constraint releasing structure.

[0010] In some embodiments, the structural strength of the constraining portion is less than the structural strength of the second packaging portion.

[0011] In some embodiments, the filling member further includes: a restraining portion, at least a portion of the second packaging portion is formed as the restraining portion, and the restraint release structure is connected to the restraining portion.

[0012] In some embodiments, the structural strength of the constraining portion is smaller than the structural strength of a portion of the second packaging portion other than the constraining portion.

[0013] In some embodiments, the restraint release structure comprises: a clamp adapted to break the restraint.

[0014] In some embodiments, the constraint release structure includes: a heating element, the heating element is disposed at the constraint portion, and the heating element is suitable for melting the constraint portion so that the filling element is transformed from the compressed state to the expanded state.

[0015] In some embodiments, the battery further includes: an end plate, wherein the end plate is suitable for being arranged between the filling piece and the battery cell group, and the filling piece is in contact with the end plate.

[0016] In some embodiments, the end plate is formed with a wire passing groove.

[0017] In some embodiments, it is characterized in that the wire passing groove is formed with an opening, and the clamping member is suitable for being taken out from the wire passing groove through the opening.

[0018] In some embodiments, it further includes: an adhesive member, wherein the adhesive member is disposed between the filling member and the end plate.

[0019] In some embodiments, the restraint relief structure and the filler are integrally formed.

[0020] A battery pack according to an embodiment of the second aspect of the present invention comprises: a tray, at least one battery cell group and a filling component, wherein the battery cell group is arranged in the tray; the filling component is arranged between the battery cell group and the frame, and the filling component is a filling component for a battery pack according to the embodiment of the first aspect of the present invention.

[0021] In some embodiments, the battery cell group and the filling assembly are arranged in the tray, and the tray has a first assembly position and a second assembly position. In the first assembly position, the side wall of the tray is suitable for being spaced apart from the frame along the height direction of the battery pack, and in the second assembly position, the tray is suitable for abutting against the frame along the height direction of the battery pack; during the movement from the first assembly position to the second assembly position, the clamping member of the filling assembly moves, and the filling member changes from a compressed state to an expanded state.

[0022] In some embodiments, the distance between the first assembly position and the second assembly position is H, and H satisfies: 5mm≤H≤15mm.

[0023] In some embodiments, the battery cell group includes: a plurality of battery cells, the plurality of battery cells are arranged along a thickness direction of the battery cells, and the filling component is disposed between the battery cell group and the vehicle frame along the thickness direction of the battery cells.

[0024] In some embodiments, it also includes: an electric control component, which is electrically connected to the heating element of the filling component.

[0025] In some embodiments, the pressure between the frame and the filler is lower than the pressure inside the filler.

[0026] A vehicle according to an embodiment of a third aspect of the present invention comprises: a frame and a battery pack, wherein the frame comprises a longitudinal beam and a cover plate, wherein the cover plate is connected to the longitudinal beam; the battery pack is a battery pack according to an embodiment of the second aspect of the present invention, wherein a cell group of the battery pack is arranged between a tray of the battery pack and the cover plate.

[0027] In some embodiments, the longitudinal beam includes: a first longitudinal beam and a second longitudinal beam, the cover plate is disposed between the first longitudinal beam and the second longitudinal beam, and the cover plate connects the first longitudinal beam and the second longitudinal beam.

[0028] 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

[0029] 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: Figure 1 is a schematic diagram of a battery pack according to an embodiment of the present invention; Figure 2 is an exploded schematic diagram of a battery pack according to an embodiment of the present invention; Figure 3is a schematic diagram of a battery cell group and a filling component according to an embodiment of the present invention; Figure 4 Figure 3 Schematic diagram of the enlarged P region.

[0030] Reference numerals: 100. Battery pack; 10. Filling assembly; 11. Filling member; 12. First packaging portion; 13. Second packaging portion; 14. Constraint portion; 15. Constraint release structure; 16. Clamping member; 17. Lead-out member; 20. Tray; 21. Cell group; 22. End plate; 23. Wire duct; 24. Cover plate; 30. Frame. DETAILED DESCRIPTION

[0031] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Figure 1-Figure 4 A filling assembly 10 for a battery pack 100 according to an embodiment of the present invention is described, including a filling member 11 and a constraint release structure 15 .

[0032] Specifically, if Figure 1-Figure 4 As shown, the filling piece 11 is suitable for being arranged between the frame 30 and the battery cell group 21, and the filling piece 11 has a compressed state and an expanded state; the constraint release structure 15 is connected to the filling piece 11, and the constraint release structure 15 is suitable for destroying the filling assembly 10 to change the filling piece 11 from a compressed state to an expanded state. When the filling piece 11 is in the expanded state, the filling piece 11 stops against the frame 30.

[0033] Combination Figure 1-Figure 4 , the filler 11 can change its physical form. In the compressed state, it occupies less space and is convenient for installation or transportation. In the expanded state, the filler 11 can expand to a larger volume to fill the gap in the battery pack 100, thereby providing better fixation and support. The function of the constraint release structure 15 is to destroy the constraint of the filler 11 at the appropriate time, so that it can naturally transform from a compressed state to an expanded state under the action of external pressure.

[0034] According to the filling assembly 10 for the battery pack 100 of the embodiment of the present invention, when the filling assembly 10 is in a compressed state, it is convenient to assemble the filling assembly 10 with the battery pack 100. After the battery pack 100 is assembled, the filling piece 11 can be converted from a compressed state to an expanded state to fill the gap between the longitudinal beam of the frame 30 and the battery cell group 21, so as to prevent the internal components of the battery pack 100 from being displaced or damaged due to vibration or collision during transportation or use. By effectively filling the gap, the shaking of the battery cell and the like can be reduced, and the risk of damage caused by friction or impact can be reduced, thereby improving the safety of the entire battery system. The setting of the constraint release structure 15 facilitates the state conversion of the filling piece 11, and the constraint release structure 15 can be automatically activated according to preset conditions, so that the filling piece 11 can expand and play a role in time.

[0035] According to some embodiments of the present invention, Figure 3 and Figure 4 As shown, the filling member 11 includes: a first packaging part 12 and a second packaging part 13, the second packaging part 13 is arranged on at least one side of the first packaging part 12, the first packaging part 12 and the second packaging part 13 are connected, and the thickness of the second packaging part 13 is less than or equal to the thickness of the first packaging part 12.

[0036] The first packaging part 12 serves as the core part of the filling piece 11, and contains filling materials or has a certain rigidity to provide basic support. When the filling piece 11 is in an expanded state, the first packaging part 12 is responsible for the main filling task to ensure that there is sufficient support and isolation between the internal components of the battery pack 100. The second packaging part 13 is arranged on at least one side of the first packaging part 12, and the second packaging part 13 forms an external protective layer or auxiliary structure. The thickness of the second packaging part 13 is thinner than that of the first packaging part 12, which facilitates the constraint release structure 15 to destroy the second packaging part 13 so that the filling piece 11 completes the state transition, thereby improving the reliability of the filling piece 11.

[0037] According to some embodiments of the present invention, Figure 3 and Figure 4 As shown, the filling member 11 further includes a restraining portion 14 , which is connected to the second packaging portion 13 and the restraint release structure 15 .

[0038] The main function of the constraint portion 14 is to keep the shape of the filling piece 11 unchanged when it is in a compressed state, and to release the constraint until it is required to expand. The constraint release structure 15 is connected to the constraint portion 14. When the filling piece 11 needs to be changed from a compressed state to an expanded state, the constraint release structure 15 will destroy the constraint portion 14, thereby allowing the filling piece 11 to expand.

[0039] Therefore, the existence of the constraint portion 14 enables the filler 11 to maintain a stable shape before expansion, ensures the airtightness of the filler 11, and prevents the filler 11 from expanding at an inappropriate time. The use of the constraint release structure 15 and the constraint portion 14 ensures that the filler 11 can expand only at an appropriate time and under appropriate conditions, thereby increasing the reliability and safety of the system operation.

[0040] According to some embodiments of the present invention, Figure 3 and Figure 4 As shown, the structural strength of the constraint portion 14 is smaller than the structural strength of the second packaging portion 13 .

[0041] The purpose of such design is to allow the constraint portion 14 to be destroyed preferentially under appropriate conditions, for example, by the action of the constraint release structure 15 to destroy the constraint portion 14, thereby allowing the filling piece 11 to expand.

[0042] Therefore, due to the low structural strength of the constraint portion 14, the constraint portion 14 is more easily destroyed or detached under the action of the constraint release structure 15, so that the filling member 11 changes from a compressed state to an expanded state. The low-strength constraint portion 14 design ensures that the filling member 11 can expand correctly under predetermined conditions and will not fail to work properly due to the constraint portion 14 being too strong.

[0043] According to some embodiments of the present invention, Figure 3 and Figure 4 As shown, at least a portion of the second packaging portion 13 is formed as a restraining portion 14 , and the restraint releasing structure 15 is connected to the restraining portion 14 .

[0044] In some embodiments, a partial area of ​​the second packaging portion 13 itself can be used as the restraining portion 14 , which can further simplify the design of the filling piece 11 , reduce the number of components, and also reduce the manufacturing cost and assembly complexity of the filling piece 11 .

[0045] According to some embodiments of the present invention, Figure 3 and Figure 4As shown, the structural strength of the constraint portion 14 is less than the structural strength of the portion of the second packaging portion 13 other than the constraint portion 14. The constraint portion 14 is connected to the second packaging portion 13, and a portion of the second packaging portion 13 is formed as the constraint portion 14, and the structural strength of this portion is lower than the structural strength of other portions of the second packaging portion 13. When the filler 11 needs to be changed from a compressed state to an expanded state, this portion is more easily damaged or detached, thereby causing the filler 11 to expand. Therefore, since the structural strength of the constraint portion 14 is relatively low, the constraint portion 14 is more easily damaged or detached under the action of the constraint release structure 15, thereby causing the filler 11 to change from a compressed state to an expanded state. The low-strength design of the constraint portion 14 ensures that the filler 11 can expand correctly under predetermined conditions and will not fail to work properly because the constraint portion 14 is too strong. The design difference in structural strength reduces the failure rate caused by the failure to release the constraint portion 14 in time, thereby improving the reliability of the entire filling assembly 10.

[0046] According to some embodiments of the present invention, Figure 3 and Figure 4 As shown, the constraint release structure 15 includes: a clamp 16, and the clamp 16 is suitable for destroying the constraint portion 14. One end of the clamp 16 is connected to the constraint portion 14, and the other end of the clamp 16 is suitable for connecting to a lead-out member 17, and the lead-out member 17 is suitable for driving the clamp 16 to move in a direction away from the filling member 11. One end of the clamp 16 is connected to the constraint portion 14 of the filling member 11, and when the constraint is released, this end will be pulled or disengaged, so that the filling member 11 can expand. The other end of the clamp 16 is connected to the lead-out member 17, and the lead-out member 17 is designed to facilitate the operator or the automated equipment to start the constraint release process when needed. When the filling member 11 needs to be changed from a compressed state to an expanded state, the operator or the automated equipment can drive the clamp 16 by pulling the lead-out member 17. One end of the clamp 16 is connected to the constraint portion 14, and the other end is driven by the lead-out member 17 to move in a direction away from the filling member 11. This action may cause the restraining portion 14 to be destroyed or detached, thereby causing the filling member 11 to lose restraint and expand.

[0047] Therefore, the design of the lead-out member 17 enables it to drive the clamping member 16 to move in a direction away from the filling member 11. When the filling member 11 needs to expand, it can be achieved by pulling the lead-out member 17. The design of the lead-out member 17 makes the constraint release process simpler and more reliable. The constraint can be released by simply pulling the lead-out member 17 in a direction away from the filling member 11, which reduces the possibility of misoperation and improves the safety of the system.

[0048] According to some embodiments of the present invention, Figure 3 and Figure 4As shown, the constraint release structure 15 includes: a heating element, which is arranged on the constraint portion 14, and the heating element is suitable for melting the constraint portion 14 to make the filling member 11 change from a compressed state to an expanded state.

[0049] When the filling member 11 needs to expand, the heating element starts and generates heat, which is transferred to the constraint portion 14, causing the material of the constraint portion 14 to melt or soften. With the destruction of the constraint portion 14, the filling member 11 loses its original constraint and begins to expand to its designed expansion state.

[0050] Thus, the use of a heating element can accurately control the expansion timing of the filling element 11. By adjusting the heating time and temperature, it can be ensured that the filling element 11 accurately expands when needed, avoiding premature or late expansion. Using a heating element as the constraint release structure 15 can realize the efficient and reliable transformation of the filling element 11 from a compressed state to an expanded state, effectively improving the expansion accuracy and reliability of the filling element 11.

[0051] According to some embodiments of the present invention, Figure 1-Figure 4 As shown, it also includes: an end plate 22 , which is arranged between the filling piece 11 and the battery cell group 21 , and the filling piece 11 is in contact with the end plate 22 .

[0052] The end plate 22 is disposed between the filling piece 11 and the cell group 21, and plays the role of fixing the cell group 21, ensuring that the cell group 21 remains stable in the battery pack 100, and preventing it from being displaced due to vibration or impact during transportation or use. The end plate 22 is in contact with the filling piece 11, which can provide additional support force to ensure that the filling piece 11 can evenly distribute pressure in the expanded state, thereby better fixing the cell group 21. The filling piece 11 is installed in a compressed state, and at this time, the filling piece 11 is in close contact with the side of the end plate 22 away from the cell group 21. When the filling piece 11 needs to expand, the constraint of the filling piece 11 is released by the constraint release structure 15, and the filling piece 11 expands and fits tightly against the end plate 22, thereby providing stable support. The end plate 22 can prevent the filling piece 11 from exerting direct pressure on the cell group 21 during the expansion process, thereby avoiding damage to the cell due to excessive pressure.

[0053] Therefore, the design of the battery pack 100 is further optimized by adding the end plate 22 between the filling member 11 and the battery cell group 21. The end plate 22 not only strengthens the fixing effect of the battery cell group 21, but also improves the overall safety and reliability.

[0054] According to some embodiments of the present invention, Figure 4As shown, the end plate 22 is formed with a wire groove 23. The wire groove 23 is provided on one side of the end plate 22 along the height direction, and the lead-out piece 17 of the filling assembly 10 is provided in the wire groove 23, and one end of the lead-out piece 17 away from the filling piece 11 extends out of the wire groove 23. Thus, the wire groove 23 is formed on the end plate 22, and the wire groove 23 is used to accommodate the lead-out piece 17 of the filling assembly 10.

[0055] According to some embodiments of the present invention, Figure 4 As shown, the wire groove 23 is formed with an opening, and the clamping member 16 is suitable for being taken out from the wire groove 23 through the opening.

[0056] An opening is formed at one end of the wire groove 23, one end of the lead-out member 17 is connected to the clamping member 16, and the other end passes through the opening of the wire groove 23 on the end plate 22 and extends out of the wire groove 23 for easy external operation. The lead-out member 17 is used to drive the constraint release structure 15 of the filling assembly 10, so that the clamping member 16 destroys the constraint portion 14, and pulls the clamping member 16 out of the wire groove 23 through the opening, thereby realizing the transformation of the filling member 11 from a compressed state to an expanded state.

[0057] Thus, the design of the wire slot 23 allows the lead-out piece 17 to extend from one end of the filling piece 11 to the outside of the tray 20, which is convenient for operation. When the filling assembly 10 needs to expand, the lead-out piece 17 extending outside the wire slot 23 is operated to drive the constraint release structure 15 of the filling assembly 10 to work, so that the filling assembly 10 expands and is tightly combined with the end plate 22. The opening is designed to facilitate the lead-out piece 17 to extend outside the wire slot 23, making the constraint release process of the filling piece 11 more convenient, and the operation can be completed without opening the battery pack 100.

[0058] According to some embodiments of the present invention, Figure 1-Figure 4 As shown, it also includes: an adhesive member, which is arranged between the filling member 11 and the end plate 22.

[0059] The adhesive is located between the filler 11 and the end plate 22. The adhesive is provided on one side of the filler 11 adjacent to the end plate 22, and may be on the edge of the contact surface between the filler 11 and the end plate 22 or on the entire contact surface. The adhesive can increase the connection strength between the filler 11 and the end plate 22, so that the filler 11 can be more firmly fixed to the end plate 22 in the expanded state, thereby improving the stability of the entire battery pack 100. The adhesive can prevent the filler 11 from shifting when subjected to external impact or vibration, ensuring that the filler 11 is always in close contact with the end plate 22 and maintains a good supporting effect.

[0060] According to some embodiments of the present invention, Figure 3 and Figure 4 As shown, the constraint release structure 15 and the filling member 11 are an integrally formed part.

[0061] An integrally formed part means that the filler 11 and the constraint relief structure 15 are formed as a whole during the manufacturing process, rather than being realized by subsequent assembly or connection, and there is no obvious dividing line or seam between the constraint relief structure 15 and the filler 11. Integral molding can enhance the integrity of the overall structure and reduce problems caused by defects in interfaces or connections.

[0062] Therefore, the design of the constraint release structure 15 and the filler 11 as an integrally formed part simplifies the production process, reduces the subsequent assembly steps, reduces the manufacturing cost and potential failure points. The integrally formed design reduces the failure caused by loose or failed connection parts and improves the overall reliability of the filler 11.

[0063] According to the second aspect of the present invention, the battery pack 100 is as follows: Figure 1-Figure 4 As shown, the battery pack 100 includes: a tray 20, at least one battery cell group 21 and a filling component 10, the battery cell group 21 is arranged in the tray 20; the filling component 10 is arranged between the battery cell group 21 and the frame 30, and the filling component 10 is a filling component 10 for the battery pack 100 according to the above-mentioned first aspect embodiment of the present invention.

[0064] The tray 20 is the external protection structure of the battery pack 100, which is mainly used to protect the internal battery cell group 21 and other components from the influence of the external environment. The battery cell group 21 is the core component of the battery pack 100, which is responsible for storing and providing electrical energy. The filling component 10 is arranged between the battery cell group 21 and the frame 30, and is mainly used to fill the gap between the battery cell group 21 and the frame 30. The filling component 10 can apply a certain restraining force to the battery cell group 21, provide support and shock absorption for the battery cell group 21, and prevent the battery cell group 21 from shaking or being subjected to external impact in the battery pack 100. The filling component 10 is a filling component 10 according to the first aspect embodiment described above, that is, it includes a filling member 11 and a constraint release structure 15, wherein the filling member 11 can switch between a compressed state and an expanded state, and the constraint release structure 15 is used to change the filling member 11 from a compressed state to an expanded state. During installation, the filling member 11 is in a compressed state, which is convenient for installation and positioning. After the installation is completed, the filling piece 11 is transformed into an expanded state through the constraint release structure 15 to fill the gap between the battery pack 21 and the longitudinal beam of the frame 30. The longitudinal beam of the frame 30 can replace the side beam of the tray 20, that is, the filling piece 11 is suitable for filling the gap between the battery pack 21 and the inner wall of the tray 20 after expansion.

[0065] According to the battery pack 100 of the embodiment of the present invention, by applying the filling assembly 10 in the above embodiment, the filling assembly 10 can effectively fill the gap between the battery cell group 21 and the frame 30, ensure that the battery cell group 21 remains stable in the battery pack 100, and reduce damage caused by vibration or impact. The filling assembly 10 can provide a good buffering effect in the expanded state, reducing the risk of short circuit of the battery cell group 21 due to friction or collision. The filling assembly 10 is easy to install in a compressed state, and can make full use of the space in the expanded state to improve space utilization. By rationally arranging the tray 20, the battery cell group 21 and the filling assembly 10, the overall performance of the battery pack 100 is effectively improved, and its safety and reliability are also enhanced.

[0066] According to some embodiments of the present invention, Figure 1-Figure 4 As shown, the battery cell group 21 and the filling component 10 are arranged in the tray 20, and the tray 20 has a first assembly position and a second assembly position. In the first assembly position, the side walls of the tray 20 are arranged at intervals along the height direction of the battery pack 100, and in the second assembly position, the tray 20 is suitable for abutting against the frame 30 along the height direction of the battery pack 100; during the movement from the first assembly position to the second assembly position, the filling member 11 changes from a compressed state to an expanded state.

[0067] The tray 20 constitutes the tray 20 of the battery pack 100, and the tray 20 is used to carry the battery cell group 21 and the filling component 10. In the first assembly position, there is a certain distance between the cover plate 24 and the tray 20, and the filling component 10 is in a compressed state. In the process of moving from the first assembly position to the second assembly position, the cover plate 24 moves downward until it is completely closed with the tray 20. In this process, the lead-out member 17 of the filling component 10 is driven to move, and then the clamping member 16 is driven to move, so that the filling member 11 is changed from a compressed state to an expanded state. When the cover plate 24 and the tray 20 are completely closed, the filling component 10 expands and fits tightly against the inner wall of the tray 20.

[0068] Therefore, during the assembly process of the cover plate 24 and the tray 20, the filling piece 11 is transformed from a compressed state to an expanded state. When the cover plate 24 and the tray 20 are assembled in place, the filling piece 11 can be expanded, which further simplifies the assembly process of the battery pack 100 and improves the convenience of operation.

[0069] According to some embodiments of the present invention, the distance between the first assembly position and the second assembly position is H, and H satisfies: 5mm≤H≤15mm.

[0070] The range of the distance between the first assembly position and the second assembly position is limited to ensure that during the movement from the first assembly position to the second assembly position, there is enough travel for the filling component 10 to fully expand, and the expanded filling component 10 will not be excessively deformed.

[0071] Therefore, by limiting the spacing range between the first assembly position and the second assembly position, it is ensured that the filling component 10 has sufficient travel when changing from a compressed state to an expanded state, thereby improving the reliability of the state transition, optimizing the state transition process of the filling component 10, improving the convenience of operation and the reliability of the system, and reducing production costs.

[0072] According to some embodiments of the present invention, Figure 1-Figure 4 As shown, the battery cell group 21 includes: a plurality of battery cells, the plurality of battery cells are arranged along the thickness direction of the battery cells, and the filling component 10 is arranged between the battery cell group 21 and the frame 30 along the thickness direction of the battery cells.

[0073] The filling component 10 is located on the side of the battery cell group 21, and the filling battery cell group 21 is arranged in the gap between the battery cell group 21 and the vehicle frame 30. The filling component 10 is opposite to the large surface of the plurality of battery cells, which can enhance the supporting effect of the filling component 10 on the battery cells, and can also make the filling component 10 avoid the explosion-proof valve and other structures of the battery cells, so as to avoid the explosion-proof valve being squeezed during the expansion of the filling component 10, thereby enhancing the safety performance of the battery cells.

[0074] Therefore, by arranging the battery cells along the thickness direction of the battery cells and providing the filling component 10 on the side, the filling component 10 can provide a good buffering effect, improve the overall stability of the battery cell group 21, and prevent the battery cells from being displaced in the battery pack 100 due to vibration or impact.

[0075] According to some embodiments of the present invention, it further includes: an electric control component, which is electrically connected to the heating element of the filling component 10.

[0076] The electric control component is electrically connected to the heating element in the filling component 10, and can control the working state of the heating element, thereby realizing accurate control of the heating process of the filling component 10. When the filling component 10 needs to expand, the electric control component starts the heating element, and the heating element generates heat to melt the restraining part 14 of the filling component 10, ensuring that the filling component 10 can accurately change from the compressed state to the expanded state.

[0077] Thus, through the control of the electric control component, the working state of the heating element can be accurately controlled to ensure that the filling component 10 can reliably expand when needed, thereby improving the reliability of the system. The electric control component can monitor the working state of the heating element in real time to prevent overheating or other abnormal conditions from occurring, thereby improving the safety of the system. The design of the electric control component allows the expansion process of the filling component 10 to be automatically controlled, reducing the need for manual operation and improving production efficiency.

[0078] According to some embodiments of the present invention, the pressure between the vehicle frame 30 and the filling member 11 is lower than the pressure inside the filling member 11 .

[0079] The pressure between the frame 30 and the filler 11 refers to the external pressure exerted by the frame 30 on the filler 11 during its expansion. The pressure inside the filler 11 refers to the pressure generated inside the filler 11 in its expanded state. When the pressure between the frame 30 and the filler 11 is less than the pressure inside the filler 11, the filler 11 can expand smoothly during its expansion without being hindered by the external pressure of the frame 30. The internal pressure is greater than the external pressure, so that the filler 11 can better fit the frame 30 in its expanded state, and the filler 11 can better fix the battery pack 21, reduce the shaking of the battery pack 21 in the tray 20, and improve the overall stability.

[0080] Therefore, by designing the pressure between the frame 30 and the filling piece 11 to be smaller than the pressure inside the filling piece 11, the design of the battery pack 100 ensures the smoothness of the filling piece 11 during the expansion process and can provide good stability in the expanded state.

[0081] The vehicle according to the third aspect of the present invention comprises: a frame 30 and a battery pack 100, wherein the frame 30 comprises a longitudinal beam and a cover plate 24, and the cover plate 24 is connected to the longitudinal beam; the battery pack 100 is the battery pack 100 according to the second aspect of the present invention, and the battery cell group of the battery pack 100 is arranged between the tray 20 and the cover plate 24 of the battery pack The frame 30 is the basic framework of the vehicle, providing support and protection. The frame 30 includes longitudinal beams, which are often used to connect the front and rear parts of the vehicle to enhance the rigidity of the vehicle body. The cover plate 24 is used to close the top of the tray 20. By connecting the cover plate 24 of the battery pack 100 with the longitudinal beam of the frame 30, the stability of the battery pack 100 on the vehicle can be enhanced to prevent the battery pack 100 from shifting due to vibration or collision during driving. The design of the connection between the cover plate 24 and the longitudinal beam can ensure that when the battery pack 100 is subjected to external impact, the impact force can be dispersed through the longitudinal beam of the frame 30, thereby reducing direct damage to the internal components of the battery pack 100.

[0082] The vehicle according to the embodiment of the present invention can further improve the safety of the vehicle, optimize the use of the internal space of the vehicle, and improve the reliability and stability of the vehicle by applying the battery pack 100 in the above embodiment.

[0083] According to some embodiments of the present invention, the longitudinal beam includes: a first longitudinal beam and a second longitudinal beam, and the cover plate 24 is disposed between the first longitudinal beam and the second longitudinal beam, and the cover plate 24 connects the first longitudinal beam and the second longitudinal beam.

[0084] The design of the first longitudinal beam and the second longitudinal beam can disperse the impact force received by the cover plate, which can effectively increase the structural stability of the frame 30, making the entire frame stronger and better able to absorb and disperse the impact force in the event of a collision, thereby protecting the safety of the battery pack 100.

[0085] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0086] In the description of the present invention, "first feature" and "second feature" may include one or more of the features. In the description of the present invention, "plurality" means two or more. In the description of the present invention, a first feature "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. In the description of the present invention, a first feature "above", "above" and "above" a second feature may include the first feature being directly above and obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature.

[0087] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" 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.

[0088] 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 filling assembly (10) for a battery pack (100), characterized in that: include: A filling piece (11), the filling piece (11) being suitable for being arranged between the vehicle frame (30) and the battery cell group (21), the filling piece (11) having a compressed state and an expanded state; A constraint release structure (15), the constraint release structure (15) being connected to the filling member (11), the constraint release structure (15) being suitable for destroying the filling assembly (10) so that the filling member (11) changes from the compressed state to the expanded state, and when the filling member (11) is in the expanded state, the filling member (11) abuts against the vehicle frame (30).

2. The filling assembly (10) for a battery pack (100) according to claim 1, characterized in that: The filling piece (11) comprises: A first packaging portion (12); A second packaging portion (13), the second packaging portion (13) being arranged on at least one side of the first packaging portion (12), the first packaging portion (12) and the second packaging portion (13) being connected, and the thickness of the second packaging portion (13) being less than or equal to the thickness of the first packaging portion (12).

3. The filling assembly (10) for a battery pack (100) according to claim 2, characterized in that: The filling piece (11) further comprises: a restraining portion (14), The constraint portion (14) is connected to the second packaging portion (13) and the constraint release structure (15).

4. The filling assembly (10) for a battery pack (100) according to claim 3, characterized in that: The structural strength of the constraint portion (14) is smaller than the structural strength of the second packaging portion (13).

5. The filling assembly (10) for a battery pack (100) according to claim 2, characterized in that: The filling piece (11) further comprises a restraining portion (14), at least a portion of the second packaging portion (13) is formed as the restraining portion (14), and the restraint release structure (15) is connected to the restraining portion (14).

6. The filling assembly (10) for a battery pack (100) according to claim 5, characterized in that: The structural strength of the constraint portion (14) is smaller than the structural strength of a portion of the second packaging portion (13) other than the constraint portion (14).

7. The filling assembly (10) for a battery pack (100) according to claim 3 or 5, characterized in that: The constraint release structure (15) comprises: A clamping member (16) is adapted to destroy the restraining portion (14).

8. The filling assembly (10) for a battery pack (100) according to claim 3 or 5, characterized in that: The constraint release structure (15) comprises: A heating element, wherein the heating element is arranged on the restraining portion (14), and the heating element is suitable for melting the restraining portion (14) so ​​that the filling element (11) changes from the compressed state to the expanded state.

9. The filling assembly (10) for a battery pack (100) according to claim 7, characterized in that: Also includes: An end plate (22), wherein the end plate (22) is suitable for being arranged between the filling piece (11) and the battery cell group (21), and the filling piece (11) is in contact with the end plate (22).

10. The filling assembly (10) for a battery pack (100) according to claim 9, characterized in that: The end plate (22) is formed with a wire passing groove (23).

11. The filling assembly (10) for a battery pack (100) according to claim 10, characterized in that: The wire passing groove (23) is formed with an opening, and the clamping member (16) is suitable for being taken out of the wire passing groove (23) through the opening.

12. The filling assembly (10) for a battery pack (100) according to claim 9, characterized in that: It also comprises: an adhesive component, wherein the adhesive component is arranged between the filling component (11) and the end plate (22).

13. The filling assembly (10) for a battery pack (100) according to claim 1, characterized in that: The constraint release structure (15) and the filling piece (11) are integrally formed parts.

14. A battery pack (100), characterized in that: include: Tray (20); at least one battery cell group (21), the battery cell group (21) being arranged in the tray (20); A filling assembly (10), the filling assembly (10) being arranged between the battery cell group (21) and the vehicle frame (30), the filling assembly (10) being a filling assembly (10) for a battery pack (100) according to any one of claims 1 to 13.

15. The battery pack (100) according to claim 14, characterized in that: The battery cell group (21) and the filling assembly (10) are arranged in the tray (20), and the tray (20) has a first assembly position and a second assembly position. In the first assembly position, the side wall of the tray (20) is suitable for being spaced apart from the frame (30) along the height direction of the battery pack, and in the second assembly position, the tray (20) is suitable for abutting against the frame (30) along the height direction of the battery pack; During the movement from the first assembly position to the second assembly position, the clamping member (16) of the filling component (10) moves, and the filling member (11) changes from a compressed state to an expanded state.

16. The battery pack (100) according to claim 15, characterized in that: The distance between the first assembly position and the second assembly position is H, and H satisfies: 5mm≤H≤15mm.

17. The battery pack (100) according to claim 14, characterized in that: The battery cell group (21) comprises: a plurality of battery cells, the plurality of battery cells are arranged along the thickness direction of the battery cells, and the filling component (10) is arranged between the battery cell group (21) and the vehicle frame (30) along the thickness direction of the battery cells.

18. The battery pack (100) according to claim 14, characterized in that: Also includes: An electric control component, the electric control component being electrically connected to a heating element of the filling component (10).

19. The battery pack (100) according to claim 14, characterized in that: The pressure between the vehicle frame and the filling piece (11) is lower than the pressure inside the filling piece (11).

20. A vehicle, characterized in that: include: A vehicle frame (30), the vehicle frame (30) comprising a longitudinal beam and a cover plate (24), the cover plate (24) being connected to the longitudinal beam; A battery pack (100), the battery pack (100) being the battery pack (100) according to any one of claims 14 to 19, the battery cell group (21) of the battery pack (100) being arranged between the tray (20) of the battery pack and the cover plate (24).

21. The vehicle according to claim 20, characterized in that The longitudinal beam comprises: First longitudinal beam; The second longitudinal beam, the cover plate (24) is arranged between the first longitudinal beam and the second longitudinal beam, and the cover plate (24) connects the first longitudinal beam and the second longitudinal beam.

Images