Battery pack assembly easy to disassemble and vehicle

Abstract

The invention relates to the technical field of vehicle power batteries, in particular to a battery pack assembly easy to disassemble and a vehicle. The battery pack assembly comprises two blocking pieces, a battery module arranged between the two blocking pieces and a restraining piece connected to the upper surface of the battery module; the battery module comprises two end plates and a plurality of battery cell units which are arranged between the two end plates in parallel, and elastic pieces are arranged between the battery cell units and the end plates or between the adjacent battery cell units; the restraining piece is used for limiting the position of the battery cell unit in the vertical direction, and the two end parts of the restraining piece are detachably connected with the two blocking pieces respectively; gluing through holes are formed in the positions, corresponding to the tops of the battery cell units, of the restraining pieces, and the surface tension of the sides, making contact with the battery cell units, of the restraining pieces is lower than the surface tension of the sides, away from the battery cell units, of the restraining pieces. The battery pack assembly is simple in structure and convenient to disassemble, and the maintenance cost of the battery pack assembly can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle power batteries, and in particular to an easily disassembled battery pack assembly and a vehicle. Background Art

[0002] With the continuous development of new energy vehicles, the battery structure of new energy vehicles has been continuously innovated by MTP, CTP, and CTV. The space utilization and energy density of the battery pack have been greatly increased, so the CTP and CTV integrated structures have been vigorously developed. However, in the related art, the bottom surface of the battery module of the battery pack is generally glued to the bottom plate of the box. For example: CN220628120U discloses a battery pack, including a box and a battery module accommodated in the box, the box includes a bottom plate, the battery module is arranged on the bottom plate, and the bottom plate and the battery module are filled with structural adhesive. Since the battery module is connected to the bottom plate by structural adhesive, it is difficult to disassemble the battery module later, which increases the maintenance cost of the battery pack. Summary of the invention

[0003] The object of the present invention is to provide a battery pack assembly and a vehicle that are easily disassembled, which have a simple structure and are easy to disassemble, thereby reducing the maintenance cost of the battery pack assembly.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is as follows: In the first aspect, the present invention provides an easily disassembled battery pack assembly, comprising two baffles, a battery module arranged between the two baffles, and a restraint connected to the upper surface of the battery module, wherein the battery module comprises two end plates and a plurality of battery cell units arranged in parallel between the two end plates, and elastic members are arranged between the battery cell units and the end plates and / or between adjacent battery cell units; the restraint is used to limit the vertical position of the battery cell units, and the two ends of the restraint are respectively detachably connected to the two baffles; a glue-coated through hole is provided on the restraint corresponding to the top of the battery cell unit, and the surface tension of the side of the restraint in contact with the battery cell unit is lower than the surface tension of the side of the restraint facing away from the battery cell unit.

[0005] Furthermore, the side of the elastic member in contact with the battery cell unit or the end plate is provided with a plurality of raised inclined surfaces, at least two of which extend in opposite directions. The raised inclined surfaces are in contact with the battery cell unit or the end plate to increase friction and prevent displacement of the battery cell unit.

[0006] Furthermore, the elastic member is rectangular, and protruding inclined surfaces for contacting and cooperating with the battery cell unit or the end plate are provided at the four corners of the rectangular elastic member, and the extending directions of the protruding inclined surfaces at two adjacent corners are opposite.

[0007] Furthermore, the elastic member includes a first hard surface layer, a second hard surface layer, and an elastic core layer located between the first hard surface layer and the second hard surface layer.

[0008] Furthermore, the material of the first hard surface layer and the second hard surface layer is PC, PBT, epoxy board or PA, and the material of the elastic core layer is silicone rubber, polyurethane, PI foam, MPP or melamine.

[0009] Furthermore, a limiting structure for limiting the relative position of the end plate and the stopper is provided between the end plate and the stopper.

[0010] Furthermore, the limiting structure includes a limiting block arranged on the stopper, a limiting groove arranged on the end plate and corresponding to the limiting block, a first limiting strip arranged on the stopper, and a second limiting strip arranged on the end plate and corresponding to the first limiting strip.

[0011] Furthermore, it also includes a bottom plate and two side plates, both ends of the side plates are fixedly connected to two blocking members, and the bottom plate, the two side plates and the two blocking members together form a storage space for accommodating the battery module.

[0012] Furthermore, a gap is left between the bottom surface of the restraint member and the top surface of the battery cell unit.

[0013] In a second aspect, the present invention provides a vehicle comprising the above-mentioned easily detachable battery pack assembly.

[0014] The present invention has the following unexpected beneficial effects: The present invention arranges an elastic member between the cell unit of the battery module and the end plate or between the adjacent cell units, and a restraining member is connected to the upper surface of the battery module. The restraining member is provided with a glue-coating through hole at a position corresponding to the top of the cell unit, so that when the battery module is installed, the bottom does not need to be coated with glue, and the position of the battery module between the two stoppers is limited by coating the structural glue in the glue-coating through hole of the restraining member. And when the battery pack assembly needs to be repaired, the structural glue on the side of the restraining member away from the cell unit is first removed. Since the surface tension of the side of the restraining member in contact with the cell unit is lower than the surface tension of the side of the restraining member away from the cell unit, the bonding strength of the side of the restraining member in contact with the cell unit is low, and the restraining member can be easily separated from the cell unit. And since the bottom of the battery module is not coated with glue, the battery module can be taken out of the accommodating space, and the disassembly is convenient and quick, thereby ensuring the maintainability of the battery pack assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention.

[0016] Figure 1 An exploded view of an easily disassembled battery pack assembly provided by an embodiment of the present invention is shown; Figure 2 A schematic diagram showing the structure of an elastic member provided by an embodiment of the present invention is shown; Figure 3 A schematic diagram showing the connection between the elastic member and the battery cell unit provided by an embodiment of the present invention is shown; Figure 4 A schematic structural diagram of an end plate provided by an embodiment of the present invention is shown; Figure 5 A schematic diagram of the structure of a blocking member provided by an embodiment of the present invention is shown; Figure 6 A schematic diagram showing the cooperation between the end plate and the stopper provided in an embodiment of the present invention is shown; Figure 7 A schematic structural diagram of a restraining member provided in an embodiment of the present invention is shown.

[0017] In the figure, 1 is a stopper, 11 is a limit block, 12 is a first limit strip, 2 is a battery module, 21 is an end plate, 211 is a limit groove, 212 is a second limit strip, 22 is a battery cell unit, 3 is a restraining member, 31 is a glue-coated through hole, 32 is a mounting hole, 4 is an elastic member, 41 is a first hard surface layer, 42 is a second hard surface layer, 43 is an elastic core layer, 44 is a raised inclined surface, and 5 is a thermally conductive adhesive. DETAILED DESCRIPTION

[0018] The following will describe the embodiments of the present invention with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention, not for limiting the scope of protection of the present invention.

[0019] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention. The drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0020] In one embodiment, see Figure 1As shown, the present invention provides an easily disassembled battery pack assembly, comprising two stoppers 1, a battery module 2 arranged between the two stoppers 1, and a restraint 3 connected to the upper surface of the battery module 2, wherein the battery module 2 comprises two end plates 21 and a plurality of battery cells 22 arranged in parallel between the two end plates 21, and an elastic member 4 is arranged between the battery cell 22 and the end plates 21 and / or between adjacent battery cells 22. The restraint 3 is used to limit the position of the battery cell 22 in the vertical direction, and the two ends of the restraint 3 are detachably connected to the two stoppers 1 respectively; a glue-coated through hole 31 is provided on the restraint 3 at a position corresponding to the top of the battery cell 22, and the surface tension of the side of the restraint 3 in contact with the battery cell 22 is lower than the surface tension of the side of the restraint 3 away from the battery cell 22.

[0021] See also Figure 7 As shown, the front and rear ends of the restraining member 3 are provided with mounting parts connected to the blocking member 1, and the mounting parts are provided with mounting holes 32 for mounting bolts to pass through.

[0022] In order to ensure the vertical restriction effect of the battery cell unit 22, see Figure 1 As shown, two restraining members 3 are arranged corresponding to each column of battery cell units 22 .

[0023] The present invention arranges an elastic member 4 between the battery cell unit 22 of the battery module 2 and the end plate 21 or between adjacent battery cell units 22, and a restraining member 3 is connected to the upper surface of the battery module 2. A gluing through hole 31 is provided on the restraining member 3 at a position corresponding to the top of the battery cell unit 22. Therefore, when the battery module 2 is installed, no gluing is required on the bottom. By applying structural glue in the gluing through hole 31 of the restraining member 3, a part of the structural glue extends outward on the side of the restraining member 3 away from the battery cell unit 22 and is bonded and fixed to the side of the restraining member away from the battery cell unit 22, and another part of the structural glue passes through the gluing through hole 31 and is arranged between the upper surface of the battery cell unit 22 and the bottom surface of the restraining member 3, thereby realizing the bonding and fixation of the battery cell unit 22 and the restraining member 3, and limiting the position of the battery module between the two blocking members. When the battery pack assembly needs to be repaired, the structural glue on the side of the restraint 3 away from the battery cell unit 22 is first removed. Since the surface tension of the side of the restraint 3 in contact with the battery cell unit 22 is lower than the surface tension of the side of the restraint 3 away from the battery cell unit 22, the bonding strength of the side of the restraint 3 in contact with the battery cell unit 22 is low, and the restraint 3 can be easily separated from the battery cell unit 22. And since the bottom of the battery module 2 is not coated with glue, the battery module 2 can be taken out of the accommodation space, and the disassembly is convenient and quick, ensuring the maintainability of the battery pack assembly.

[0024] During the specific installation, the elastic member 4 is fixed between the battery cell unit 22 and the end plate 21, and between the adjacent battery cell units 22 to form a virtual module. The two end plates 21 are clamped by a clamping tool, and the elastic member 4 is compressed and deformed under the clamping pressure of the clamping tool, so that the distance between the two end plates of the virtual module is smaller than the distance after assembly. Driven by the clamping tool, the virtual module is placed between the two baffles 1, and the clamping tool is removed. The elastic member 4 rebounds and deforms, so that the two end plates are correspondingly abutted against the side of the baffle 1. Then, bolts are used to pass through the mounting holes 32 at both ends of the constraint member 3 to be detachably connected to the baffle 1, and then structural adhesive for bonding is applied to the glue through hole 31. A portion of the coated structural adhesive extends on the side of the restraint 3 away from the battery cell unit 22, and is bonded and fixed to the side of the restraint 3 away from the battery cell unit 22, and another portion of the structural adhesive passes through the glue coating through hole 31, and is arranged between the upper surface of the battery cell unit 22 and the bottom surface of the restraint 3, thereby achieving bonding and fixing of the battery cell unit 22 and the restraint 3, and limiting the position of the battery module between the two blocks.

[0025] When the battery pack assembly needs to be repaired, remove the bolts on the restraint 3, and use a sharp tool to scrape off the structural glue on the top surface of the restraint 3, that is, the side of the restraint 3 facing away from the battery cell unit 22. Since the bonding strength of the bottom surface of the restraint 3, that is, the side of the restraint 3 in contact with the battery cell unit 22 is low, the restraint 3 can be easily separated from the battery cell unit 22, and the length of the virtual module is compressed by the clamping tool to release the coupling structure of the end plate 21 and the baffle 1. Since there is no structural bonding at the bottom of the battery cell unit 22, the battery module 2 can be directly taken out of the accommodating space, thereby achieving the purpose of disassembling the CTP / CTV structure, which can effectively reduce the maintenance cost of the CTP / CTV battery structure.

[0026] In a preferred embodiment, a plurality of raised inclined surfaces 44 are provided on the side of the elastic member 4 in contact with the battery cell unit 22 or the end plate 21, and at least two raised inclined surfaces 44 extend in opposite directions. The raised inclined surfaces 44 are in contact with the battery cell unit 22 or the end plate 21 to increase friction and prevent displacement of the battery cell unit 22.

[0027] The design of the raised slope 44 significantly increases the contact area between the elastic member 4 and the battery cell 22 or the end plate 21, thereby increasing the friction between the two. This physical locking mechanism helps to maintain the stable position of the battery cell 22 under vibration or impact conditions, reducing the risk of internal short circuit or damage caused by movement.

[0028] Since at least two of the raised inclined surfaces 44 extend in opposite directions, they can not only provide stable support in a single direction, but also constrain the battery cell unit 22 in multiple directions. This multi-directional locking effect allows the battery cell unit 22 to be effectively fixed when subjected to forces from different directions, thereby improving the structural strength and safety of the entire battery pack.

[0029] As an elastic member 4, it itself has a certain buffering and shock-absorbing effect, and the design of the raised inclined surface 44 can disperse and absorb the impact energy from the battery cell unit 22 or the external environment to a certain extent while increasing the friction, thereby protecting the battery cell unit 22 from direct damage.

[0030] Although such a configuration increases the complexity of the design, it may actually simplify the operation during the actual assembly process because once the battery cell unit 22 is placed in the correct position, the natural shape of the raised slope 44 will guide the battery cell unit 22 to be quickly and stably positioned, reducing the need for manual adjustment.

[0031] In a preferred embodiment, see Figure 2 As shown, the elastic member 4 is rectangular, and protruding inclined surfaces 44 for contacting and cooperating with the battery cell unit 22 or the end plate 21 are provided at the four corners of the rectangular elastic member 4, and the extending directions of the protruding inclined surfaces 44 at two adjacent corners are opposite.

[0032] See also Figure 3 As shown, rectangular elastic members 4 are arranged on the four corners of the side of the battery cell 22 corresponding to the adjacent battery cell 22 or the side corresponding to the end plate 21. This arrangement allows the battery cell 22 to be effectively fixed in all four directions on the horizontal plane. This all-round design ensures that when the battery cell 22 is subjected to force from any direction, it can resist displacement through the friction provided by the raised inclined surface 44, thereby improving the overall stability. At the same time, it also helps to disperse the force exerted on the battery cell 22 to the entire contact surface, thereby reducing the possibility of stress concentration. This helps to extend the service life of the battery cell 22 and the elastic member 4, and improves the reliability of the entire battery pack.

[0033] Since the convex inclined surfaces 44 on two adjacent corners of the rectangular elastic member 4 extend in opposite directions, this opposite locking design enables the battery cell unit 22 to be subjected to friction forces in two opposite directions at the same time when subjected to a force from a diagonal direction, thereby being more firmly held in place. This design is particularly suitable for battery packs that need to withstand complex mechanical environments, such as power battery packs in electric vehicles.

[0034] The rectangular shape and the standardized raised slope 44 design make the manufacture of the elastic member 4 simpler and more efficient. At the same time, this design is also convenient for layout and assembly in the battery pack, reducing production costs and assembly difficulty.

[0035] In summary, the preferred embodiment of providing raised inclined surfaces 44 on the four corners of the rectangular elastic member 4 for contacting and cooperating with the battery cell unit 22 or the end plate 21 not only improves the fixing effect of the battery cell unit 22, but also enhances the overall performance and reliability of the battery pack.

[0036] For example, the restraint 3 is a PP plastic part, which has a low surface tension. There are many ways to adjust the surface tension of the restraint 3 on the side away from the battery cell unit 22, which can be mainly summarized into three categories: physical method, chemical method and heat treatment method. The following are specific adjustment methods: 1. Physical methods Spray lubricant: Spray a uniform lubricating film on the plastic surface to increase its surface tension.

[0037] Advantages: It is not easy to form an oxide layer, suitable for steel mold products and products that require surface lubrication.

[0038] Physical vapor deposition: Metal gas is deposited onto the plastic surface through vacuum evaporation technology to form a hard and compact metal layer, increasing the surface tension.

[0039] Application: Suitable for plastic parts with high requirements on surface hardness and wear resistance.

[0040] 2. Chemical Methods Surface oxidation treatment: Use oxidizing liquids such as acid, alkali or peroxide to brush on the plastic surface to oxidize the surface, increase polarity, and thus increase surface tension.

[0041] Note: Choose appropriate oxidizing liquid to reduce the impact on raw materials and not affect the mechanical properties of the product.

[0042] Use of surfactants: Surfactants are compounds in organic chemistry that can form a very thin film on the surface of plastics and increase surface tension.

[0043] Note: The amount of surfactant used should be appropriate. Too much may affect the mechanical properties and weather resistance of the plastic.

[0044] Radiation treatment: Through methods such as electron beam radiation, ultraviolet radiation or ion radiation, active functional groups such as free radicals are generated on the plastic surface, thereby increasing the surface polarity and thus the surface tension.

[0045] Application: The specific radiation method to be selected should be determined based on factors such as product material, shape, size and radiation equipment.

[0046] 3. Heat treatment method High temperature boiling: Put the plastic parts into a heating container and add deionized water for boiling. The high temperature removes impurities such as mold release agent and grease remaining on the surface of the plastic parts and increases the surface tension.

[0047] Note: When cooking, the temperature should be controlled within a certain range (such as 90°C-100°C), and the heating time should also be appropriate (such as 20-60 minutes) to ensure the effect and avoid damaging the plastic material.

[0048] Comprehensive consideration: Different methods of adjusting surface tension should be selected for different types of plastics and different production requirements. For example, for plastic parts that need to improve wear resistance and hardness, physical vapor deposition can be considered; for plastic parts that need to remove surface impurities, high-temperature boiling and other methods can be used.

[0049] Evaluation effect: After adopting the above method, the surface tension of the plastic parts should be tested and evaluated using tools such as a surface tension meter to ensure that the expected adjustment effect is achieved.

[0050] Note: In the process of adjusting the surface tension of plastic parts, attention should also be paid to environmental protection and safety issues. For example, when using chemical methods, environmentally friendly oxidizing liquids and activators should be selected; in the heat treatment process, attention should be paid to safety measures such as fire prevention and explosion prevention.

[0051] In a preferred embodiment, see Figure 2 As shown, the elastic member 4 includes a first hard surface layer 41, a second hard surface layer 42, and an elastic core layer 43 located between the first hard surface layer 41 and the second hard surface layer 42. The first hard surface layer 41 and the second hard surface layer 42 provide a solid outer layer protection for the elastic member 4, which can effectively resist external impact and wear. This hard surface layer can extend the service life of the elastic member 4 and reduce damage caused by long-term use or harsh environment. The elastic core layer 43 located between the two hard surface layers is the core part of the elastic member 4, which is responsible for providing the required elasticity and buffering effect. The elastic core layer 43 can be made of a material with good resilience and durability to ensure that it can quickly restore its original shape when subjected to pressure or impact, and effectively absorb and disperse energy.

[0052] In a preferred embodiment, the first hard surface layer and the second hard surface layer are made of PC, PBT, epoxy board or PA, and the elastic core layer is made of silicone rubber, polyurethane, PI foam, MPP or melamine. This material selection is based on the physical and chemical properties of various materials to ensure that the elastic member 4 can meet the requirements of the battery pack in terms of stability, durability, elasticity and safety.

[0053] Material selection for the first hard surface layer and the second hard surface layer.

[0054] PC (polycarbonate): It has high strength, high transparency, good heat resistance and impact resistance, and is one of the ideal materials for making hard surfaces.

[0055] PBT (polybutylene terephthalate): has excellent heat resistance, chemical resistance and mechanical strength, and is suitable for environments that need to withstand high temperatures or chemical corrosion.

[0056] Epoxy board: It has excellent insulation, heat resistance and mechanical strength, and is often used in structural parts of electronic products.

[0057] PA (nylon or polyamide): wear-resistant, oil-resistant, self-lubricating, with high mechanical strength and good thermal stability.

[0058] The selection of these materials ensures that the first hard surface layer and the second hard surface layer have sufficient hardness and strength to provide effective support and protection for the battery cell unit 22 or the end plate 21 .

[0059] Material selection for the elastic core.

[0060] Silicone rubber: It has excellent elasticity, high and low temperature resistance, aging resistance and chemical corrosion resistance, and is one of the commonly used materials for manufacturing elastic core layers.

[0061] Polyurethane: It also has good elasticity and wear resistance, and has high load-bearing capacity and resilience.

[0062] PI foam: polyimide foam, has excellent high temperature resistance, chemical resistance and flame retardancy, while maintaining a certain elasticity and softness.

[0063] MPP (modified polypropylene): The heat resistance, rigidity and impact resistance of polypropylene are improved through modification, making it suitable for occasions requiring higher strength and heat resistance.

[0064] Melamine: Although melamine itself is not directly used as an elastic material, its modified products or compounds with other materials may have certain elasticity and strength, depending on the formulation and process.

[0065] The selection of these materials ensures that the elastic core layer can provide sufficient elasticity and buffering effect to absorb and disperse the energy generated by the battery cell 22 during vibration or impact, thereby protecting the battery cell 22 from damage.

[0066] In summary, by reasonably selecting the materials of the first hard surface layer 41 , the second hard surface layer 42 and the elastic core layer 43 , it can be ensured that the elastic member 4 can exert the best performance and effect in the battery pack.

[0067] In a preferred embodiment, see Figures 4 to 6 As shown, a limiting structure for limiting the relative position of the end plate 21 and the stopper 1 is provided between the end plate 21 and the stopper 1 .

[0068] By limiting the relative positions of the end plate 21 and the baffle 1, the limiting structure can prevent them from moving or misaligning due to vibration, impact or other external factors during use, helping to maintain the stability of the internal structure of the battery pack and ensure correct fit and effective connection between the components.

[0069] In addition, the relative position accuracy between the components is crucial during the design and manufacturing of the battery pack. The limiting structure can ensure that the end plate 21 and the stopper 1 reach a predetermined position accuracy during assembly, thereby meeting the overall performance requirements of the battery pack.

[0070] In some cases, the misalignment or looseness of the end plate 21 and the stopper 1 may cause a short circuit, leakage or other safety problems inside the battery pack. The design of the limiting structure can reduce this risk and improve the safety performance of the battery pack.

[0071] The specific form of the limiting structure can be selected according to the design requirements and manufacturing process of the battery pack. The following are some possible implementation methods: Slot and buckle: A slot is designed on the end plate 21, and a corresponding buckle is designed on the stopper 1. During assembly, the buckle is embedded in the slot, thereby limiting the relative position of the end plate 21 and the stopper 1.

[0072] Protrusion and groove: A protrusion and a groove are respectively designed on the contact surface of the end plate 21 and the stopper 1. The positioning and fixation of the end plate 21 and the stopper 1 are achieved through the cooperation of the protrusion and the groove.

[0073] Threaded connection: threaded holes are provided on the end plate 21 or the stopper 1, and the two are connected together by threaded fasteners (such as screws). This method not only has a limiting effect, but also provides additional fastening force.

[0074] Elastic buckle: The buckle structure is designed by utilizing the characteristics of elastic materials. During assembly, the buckle is elastically deformed under the action of external force and embedded into the corresponding slot, and returns to its original shape to fix the end plate 21 and the stopper 1 after the external force is removed.

[0075] In a preferred embodiment, see Figures 4 to 6 As shown, the limiting structure includes a limiting block 11 arranged on the stopper 1, a limiting groove 211 arranged on the end plate 21 and corresponding to the limiting block 11, a first limiting strip 12 arranged on the stopper 1, and a second limiting strip 212 arranged on the end plate 21 and corresponding to the first limiting strip 12.

[0076] The limit block 11 is arranged on the stopper 1, and is usually one or more raised parts with a specific shape and size. The limit groove 211 is arranged on the end plate 21, corresponding to the limit block 11, and is one or more grooves or holes that can accommodate the limit block 11. When the stopper 1 is installed on the end plate 21, the limit block 11 will naturally slide into or snap into the limit groove 211, thereby limiting the movement of the stopper 1 in the horizontal or vertical direction. This matching method is simple and effective, and can quickly position and fix the stopper 1.

[0077] The first limit strip 12 is arranged on the stopper 1, and is usually one or more extended protrusions, and its shape and size are determined according to the design requirements. The second limit strip 212 is arranged on the end plate 21, corresponding to the first limit strip 12, and is a groove, a groove or another protrusion that cooperates with it. The matching mode of the first limit strip 12 and the second limit strip 212 can be a sliding fit, a snap fit or a clearance fit, etc., depending on the design requirements. This matching mode can form one or more parallel constraint surfaces between the stopper 1 and the end plate 21, further limiting the relative movement between them.

[0078] For example, see Figure 4 and Figure 5 As shown, the first limit strip 12 and the second limit strip 212 are gap-matched, four first limit strips 12 arranged in parallel up and down are provided on the blocking member 1, and three second limit strips 212 corresponding to the gaps between the first limit strips 12 are provided on the end plate 21.

[0079] In a preferred embodiment, the easily disassembled battery pack assembly further includes a bottom plate and two side plates, which are not shown in the figure. The front and rear ends of the side plates are welded and fixedly connected with two baffles 1. The bottom plate, the two side plates and the two baffles 1 together form a storage space for accommodating the battery module 2. Such an arrangement not only improves the structural strength and stability of the battery pack assembly, but also ensures the safety and protection effect of the battery module therein.

[0080] As the bottom support structure of the battery pack assembly, the base plate bears the weight of the entire battery pack assembly as well as the impact and vibration from below. Therefore, the base plate needs to have sufficient strength and rigidity to ensure the stable operation of the battery pack under various working conditions. At the same time, the base plate may also be in direct contact with the bottom of the battery module 2 to further improve the fixing effect of the battery module by increasing the contact area and friction. Exemplarily, a liquid cooling plate is arranged on the base plate, and the liquid cooling plate is coated with thermal conductive glue 5, and the battery module 2 is placed on the liquid cooling plate coated with thermal conductive glue.

[0081] The two side panels are located on the left and right sides of the battery pack assembly, and together with the bottom plate and the baffle 1, form a closed or semi-closed accommodation space. The main function of the side panels is to limit the movement of the battery module 2 in the left and right directions to prevent it from being displaced from the predetermined position due to vibration or impact. In addition, the side panels can also provide additional protection to prevent external objects from causing damage to the battery module 2. In order to increase the strength and stability of the side panels, they are usually welded and fixed to the baffle.

[0082] In this embodiment, the baffle 1 not only plays a role in limiting the position of the end plate 21 (as described above), but also becomes a key component for connecting the side plates. The welded fixed connection between the baffle 1 and the side plate ensures the firmness and integrity of the entire battery pack structure. At the same time, the baffle 1 can also serve as a support point for the battery module 2 in the vertical direction, and together with the bottom plate and the side plate, provide all-round protection for the battery module.

[0083] The bottom plate, the two side plates and the two baffles 1 are connected together by welding or other fixing methods to form a closed or semi-closed space for accommodating the battery module 2. The size and shape of this space are designed according to the size and number of the battery module 2 to ensure that the battery module 2 can be tightly placed therein while leaving necessary heat dissipation and maintenance space.

[0084] By adding a bottom plate and two side plates and combining them with the baffle 1, this preferred embodiment provides a more complete and solid structural frame for the battery pack assembly. This frame not only improves the overall strength and stability of the battery pack assembly, but also ensures the safety and protection of the battery module 2 therein. At the same time, this design also facilitates the subsequent expansion and maintenance of the battery pack assembly.

[0085] In a preferred embodiment, a gap is left between the bottom surface of the restraint member 3 and the top surface of the battery cell unit 22 to facilitate the structural adhesive to pass through the adhesive through hole and enter between the top surface of the battery cell unit 22 and the bottom surface of the restraint member 2 .

[0086] In a second aspect, the present invention provides a vehicle comprising the above-mentioned easily detachable battery pack assembly.

[0087] The above embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Any equivalent substitution or change made by a person skilled in the art based on the present invention is within the protection scope of the present invention.

Claims

1. An easily disassembled battery pack assembly, characterized in that: The invention comprises two blocking members (1), a battery module (2) arranged between the two blocking members (1), and a restraining member (3) connected to the upper surface of the battery module (2), wherein the battery module (2) comprises two end plates (21) and a plurality of battery cell units (22) arranged in parallel between the two end plates (21), and an elastic member (4) is arranged between the battery cell units (22) and the end plates (21) and / or between adjacent battery cell units (22); The restraining member (3) is used to limit the position of the battery cell unit (22) in the vertical direction, and the two ends of the restraining member (3) are respectively detachably connected to the two blocking members (1); a glue-coated through hole (31) is provided on the restraining member (3) at a position corresponding to the top of the battery cell unit (22), and the surface tension of the side of the restraining member (3) in contact with the battery cell unit (22) is lower than the surface tension of the side of the restraining member (3) facing away from the battery cell unit (22).

2. The easily detachable battery pack assembly according to claim 1, characterized in that: A plurality of raised inclined surfaces (44) are provided on the side of the elastic member (4) in contact with the battery cell unit (22) or the end plate (21), and at least two of the raised inclined surfaces (44) extend in opposite directions. The raised inclined surfaces (44) are in contact with the battery cell unit (22) or the end plate (21) to increase frictional force and prevent displacement of the battery cell unit (22).

3. The easily detachable battery pack assembly according to claim 2, characterized in that: The elastic member (4) is rectangular, and protruding inclined surfaces (44) that contact and cooperate with the battery cell unit (22) or the end plate (21) are provided at the four corners of the rectangular elastic member (4), and the protruding inclined surfaces (44) at two adjacent corners extend in opposite directions.

4. The easily detachable battery pack assembly according to claim 1, characterized in that: The elastic member (4) comprises a first hard surface layer (41), a second hard surface layer (42), and an elastic core layer (43) located between the first hard surface layer (41) and the second hard surface layer (42).

5. The easily detachable battery pack assembly according to claim 4, characterized in that: The material of the first hard surface layer (41) and the second hard surface layer (42) is PC, PBT, epoxy board or PA, and the material of the elastic core layer (43) is silicone rubber, polyurethane, PI foam, MPP or melamine.

6. The easily detachable battery pack assembly according to claim 1, characterized in that: A limiting structure for limiting the relative position of the end plate (21) and the stopper (1) is provided between the end plate (21) and the stopper (1).

7. The easily detachable battery pack assembly according to claim 6, characterized in that: The limiting structure comprises a limiting block (11) arranged on the stopper (1), a limiting groove (211) arranged on the end plate (21) and correspondingly matched with the limiting block (11), a first limiting strip (12) arranged on the stopper (1), and a second limiting strip (212) arranged on the end plate (21) and correspondingly matched with the first limiting strip (12).

8. The easily detachable battery pack assembly according to claim 1, characterized in that: It also comprises a bottom plate and two side plates, the two ends of the side plates being fixedly connected to the two blocking members (1), and the bottom plate, the two side plates and the two blocking members together form a storage space for accommodating the battery module (2).

9. The easily detachable battery pack assembly according to claim 1, characterized in that: A gap is left between the bottom surface of the restraining member (3) and the top surface of the battery cell unit (22).

10. A vehicle, characterized in that: A battery pack assembly that is easily disassembled comprising any one of claims 1 to 9.

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