Easily detachable battery pack assembly and vehicle

Abstract

The application 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 stop pieces, a battery module arranged between the two stop pieces and a restraint piece connected to the upper surface of the battery module. The battery module comprises two end plates and a plurality of cell units arranged side by side between the two end plates. Elastic pieces are arranged between the cell units and the end plates or between adjacent cell units. The restraint piece is used for limiting the position of the cell units in the vertical direction, and the two ends of the restraint piece are detachably connected with the two stop pieces. A glue-coated through hole is arranged on the restraint piece at a position corresponding to the top of the cell unit. The surface tension of the side of the restraint piece in contact with the cell unit is lower than the surface tension of the side of the restraint piece away from the cell unit. The application has the advantages of simple structure, convenient disassembly and reduced maintenance cost of the battery pack assembly.

Description

Technical Field

[0001] This invention relates to the field of vehicle power battery technology, specifically to an easily detachable battery pack assembly and vehicle. Background Technology

[0002] With the continuous development of new energy vehicles, the battery structure of new energy vehicles has been constantly innovated from MTP, CTP, and CTV. This has greatly increased the space utilization and energy density of battery packs, thus leading to the vigorous development of CTP and CTV integrated structures. However, in related technologies, the bottom surface of the battery module is generally bonded to the bottom plate of the battery pack. For example, CN220628120U discloses a battery pack including a housing and battery modules housed within the housing. The housing includes a bottom plate, and the battery modules are disposed on the bottom plate, with structural adhesive filling the space between the bottom plate and the battery modules. Because the battery modules are connected to the bottom plate by structural adhesive, subsequent disassembly of the battery modules is more difficult, increasing the maintenance cost of the battery pack. Summary of the Invention

[0003] The purpose of this invention is to provide an easily disassembled battery pack assembly and vehicle, which has a simple structure, is easy to disassemble, and can reduce the maintenance cost of the battery pack assembly.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0005] In a first aspect, the present invention provides an easily detachable battery pack assembly, comprising two baffles, a battery module disposed between the two baffles, and a constraint member connected to the upper surface of the battery module. The battery module includes two end plates and a plurality of battery cell units arranged side by side between the two end plates. Elastic members are arranged between the battery cell units and the end plates and / or between adjacent battery cell units. The constraint member is used to restrict the position of the battery cell units in the vertical direction. The two ends of the constraint member are detachably connected to the two baffles respectively. The constraint member has an adhesive through hole at a position corresponding to the top of the battery cell unit. The surface tension of the constraint member on the side in contact with the battery cell unit is lower than the surface tension of the constraint member on the side away from the battery cell unit.

[0006] Furthermore, the elastic element has multiple raised inclined surfaces on the side that contacts the battery cell unit or end plate, with at least two raised inclined surfaces extending in opposite directions. The contact between the raised inclined surfaces and the battery cell unit or end plate increases the friction force and prevents the battery cell unit from shifting.

[0007] Furthermore, the elastic element is rectangular, and each of the four corners of the rectangular elastic element is provided with a raised inclined surface that contacts and cooperates with the battery cell unit or end plate, and the extension directions of the raised inclined surfaces on two adjacent corners are opposite.

[0008] Furthermore, the elastic element 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.

[0009] Furthermore, the materials of the first and second rigid outer layers are PC, PBT, epoxy board or PA, and the materials of the elastic core layer are silicone rubber, polyurethane, PI foam, MPP or melamine.

[0010] Furthermore, a limiting structure is provided between the end plate and the stop to restrict the relative position of the end plate and the stop.

[0011] Furthermore, the limiting structure includes a limiting block arranged on the stop, a limiting groove arranged on the end plate and corresponding to the limiting block, a first limiting strip arranged on the stop, and a second limiting strip arranged on the end plate and corresponding to the first limiting strip.

[0012] Furthermore, it also includes a base plate and two side plates, with two end plates fixedly connected to two baffles. The base plate, the two side plates, and the two baffles together form a space for accommodating the battery module.

[0013] Furthermore, a gap is left between the bottom surface of the constraint member and the top surface of the battery cell unit.

[0014] In a second aspect, the present invention provides a vehicle including the aforementioned easily removable battery pack assembly.

[0015] The present invention has the following unexpected beneficial effects:

[0016] This invention includes an elastic element arranged between the battery cell unit and the end plate of the battery module, or between adjacent battery cell units. A constraint element is connected to the upper surface of the battery module. The constraint element has a through-hole for applying adhesive at a position corresponding to the top of the battery cell unit. Therefore, during battery module installation, no adhesive is needed at the bottom. Structural adhesive is applied within the through-hole of the constraint element to restrict the position of the battery module between the two elements. Furthermore, when the battery pack assembly requires maintenance, the structural adhesive on the side of the constraint element away from the battery cell unit is removed first. Because the surface tension on the side of the constraint element in contact with the battery cell unit is lower than that on the side away from the battery cell unit, the adhesive strength on the side of the constraint element in contact with the battery cell unit is lower, allowing the constraint element to be easily separated from the battery cell unit. Since no adhesive is applied to the bottom of the battery module, the battery module can be easily and quickly removed from the receiving space, ensuring the maintainability of the battery pack assembly. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention.

[0018] Figure 1 An exploded view of an easily disassembled battery pack assembly provided in an embodiment of the present invention is shown;

[0019] Figure 2 A schematic diagram of the structure of the elastic element provided in an embodiment of the present invention is shown;

[0020] Figure 3 A schematic diagram showing the connection between the elastic element and the battery cell unit provided in an embodiment of the present invention is shown;

[0021] Figure 4 A schematic diagram of the end plate provided in an embodiment of the present invention is shown;

[0022] Figure 5 A schematic diagram of the structure of the stop provided in an embodiment of the present invention is shown;

[0023] Figure 6 A schematic diagram of the fit between the end plate and the stop provided in an embodiment of the present invention is shown;

[0024] Figure 7 A schematic diagram of the constraint element provided in an embodiment of the present invention is shown.

[0025] In the diagram, 1—stop, 11—limiting block, 12—first limiting strip, 2—battery module, 21—end plate, 211—limiting groove, 212—second limiting strip, 22—cell unit, 3—constraining component, 31—adhesive through hole, 32—mounting hole, 4—elastic component, 41—first hard surface layer, 42—second hard surface layer, 43—elastic core layer, 44—protruding slope, 5—thermal conductive adhesive. Detailed Implementation

[0026] The embodiments of the present invention will be described below with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention and not for limiting the scope of protection of the present invention.

[0027] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. The drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0028] In one embodiment, see Figure 1 As shown, the present invention provides an easily detachable battery pack assembly, including two retaining members 1, a battery module 2 arranged between the two retaining members 1, and a constraint member 3 connected to the upper surface of the battery module 2. The battery module 2 includes two end plates 21 and a plurality of battery cell units 22 arranged side by side between the two end plates 21. Elastic members 4 are arranged between the battery cell units 22 and the end plates 21 and / or between adjacent battery cell units 22. The constraint member 3 is used to restrict the position of the battery cell units 22 in the vertical direction. The two ends of the constraint member 3 are detachably connected to the two retaining members 1 respectively. The constraint member 3 has a glue-applying through hole 31 at a position corresponding to the top of the battery cell unit 22. The surface tension of the constraint member 3 on the side in contact with the battery cell unit 22 is lower than the surface tension of the constraint member 3 on the side away from the battery cell unit 22.

[0029] See Figure 7 As shown, the front and rear ends of the constraint member 3 are provided with mounting parts that are connected to the stop member 1, and the mounting parts are provided with mounting holes 32 for mounting bolts to pass through.

[0030] To ensure the vertical constraint effect of the battery cell unit 22, see [reference needed]. Figure 1 As shown, each column of battery cell unit 22 is arranged with two constraint members 3.

[0031] In this invention, an elastic member 4 is arranged between the cell unit 22 of the battery module 2 and the end plate 21 or between adjacent cell units 22. A constraint member 3 is connected to the upper surface of the battery module 2. The constraint member 3 is provided with an adhesive through hole 31 at a position corresponding to the top of the cell unit 22. Thus, when the battery module 2 is installed, no adhesive is needed at the bottom. Structural adhesive is applied in the adhesive through hole 31 of the constraint member 3. Part of the structural adhesive extends outward from the side of the constraint member 3 away from the cell unit 22 and is bonded and fixed to the side of the constraint member away from the cell unit 22. Another part of the structural adhesive passes through the adhesive through hole 31 and is arranged between the upper surface of the cell unit 22 and the bottom surface of the constraint member 3, thereby achieving the bonding and fixation of the cell unit 22 and the constraint member 3 and restricting the position of the battery module between the two members. Furthermore, when the battery pack assembly requires maintenance, the structural adhesive on the side of the constraint member 3 facing away from the cell unit 22 is removed first. Since the surface tension of the side of the constraint member 3 in contact with the cell unit 22 is lower than the surface tension of the side of the constraint member 3 facing away from the cell unit 22, the adhesive strength on the side of the constraint member 3 in contact with the cell unit 22 is lower, allowing the constraint member 3 to be easily separated from the cell unit 22. Also, since no adhesive is applied to the bottom of the battery module 2, the battery module 2 can be removed from the receiving space, making disassembly convenient and quick, thus ensuring the maintainability of the battery pack assembly.

[0032] During installation, the elastic element 4 is fixed between the battery cell unit 22 and the end plate 21, and between adjacent battery cell units 22, forming a virtual module. A clamping fixture holds the two end plates 21, and the elastic element 4 is compressed and deformed under the clamping pressure of the fixture, thus making the distance between the two end plates of the virtual module smaller than the distance after assembly. Driven by the clamping fixture, the virtual module is placed between the two stops 1. The clamping fixture is then removed, and the elastic element 4 springs back, causing the two end plates to abut against the sides of the stops 1. Then, the two ends of the constraint element 3 are detachably connected to the stops 1 by bolts passing through the mounting holes 32, and structural adhesive is applied to the adhesive through holes 31. Part of the applied structural adhesive extends outward from the side of the constraint member 3 away from the cell unit 22 and is bonded and fixed to the side of the constraint member away from the cell unit 22. Another part of the structural adhesive passes through the adhesive through hole 31 and is arranged between the upper surface of the cell unit 22 and the bottom surface of the constraint member 3, so as to achieve the bonding and fixation between the cell unit 22 and the constraint member 3 and restrict the position of the battery module between the two stops.

[0033] When the battery pack assembly needs maintenance, remove the bolts on the constraint member 3, and use a sharp tool to remove the structural adhesive from the top surface of the constraint member 3, i.e. the side of the constraint member 3 away from the cell unit 22. Since the bottom surface of the constraint member 3, i.e. the side of the constraint member 3 in contact with the cell unit 22, has low adhesive strength, the constraint member 3 can be easily separated from the cell unit 22. Use a clamping tool to compress the length of the virtual module, and release the coupling structure between the end plate 21 and the stop member 1. Since there is no structural adhesive at the bottom of the cell unit 22, the battery module 2 can be directly removed from the receiving space, achieving the purpose of disassembling the CTP / CTV structure, which can effectively reduce the maintenance cost of the CTP / CTV battery structure.

[0034] In a preferred embodiment, the elastic member 4 has a plurality of raised inclined surfaces 44 on the side that contacts the battery cell unit 22 or the end plate 21, and at least two raised inclined surfaces 44 extend in opposite directions. The contact between the raised inclined surfaces 44 and the battery cell unit 22 or the end plate 21 increases the friction force and prevents the battery cell unit 22 from displacing.

[0035] The raised bevel 44 significantly increases the contact area between the elastic element 4 and the cell unit 22 or end plate 21, thereby increasing the friction between them. This physical locking mechanism helps maintain the stable position of the cell unit 22 under vibration or shock conditions, reducing the risk of internal short circuits or damage that may result from movement.

[0036] Since at least two of the raised ramps 44 extend in opposite directions, they not only provide stable support in a single direction but also constrain the cell unit 22 in multiple directions. This multi-directional locking effect ensures that the cell unit 22 is effectively fixed when subjected to forces from different directions, thereby improving the structural strength and safety of the entire battery pack.

[0037] As an elastic element 4, it has a certain buffering and shock absorption function. The design of the raised inclined surface 44 increases the friction force and can also disperse and absorb the impact energy from the battery cell unit 22 or the external environment to a certain extent, protecting the battery cell unit 22 from direct damage.

[0038] While this design increases complexity, it may actually simplify the assembly process. Once the battery cell 22 is placed in the correct position, the natural shape of the raised ramp 44 will guide the battery cell 22 into place quickly and stably, reducing the need for manual adjustments.

[0039] In a preferred embodiment, see Figure 2 As shown, the elastic element 4 is rectangular, and each of the four corners of the rectangular elastic element 4 is provided with a raised inclined surface 44 that contacts and cooperates with the battery cell unit 22 or the end plate 21. The extension directions of the raised inclined surfaces 44 on two adjacent corners are opposite.

[0040] See Figure 3 As shown, rectangular elastic elements 4 are arranged at the four corners of the side of the battery cell 22 that mates with adjacent battery cell 22 or with the side of the end plate 21. This arrangement effectively fixes the battery cell 22 in all four directions on the horizontal plane. This omnidirectional design ensures that the battery cell 22 can resist displacement through the frictional force provided by the raised inclined surface 44 when subjected to forces from any direction, thereby improving overall stability. It also helps to distribute the force on the battery cell 22 across the entire contact surface, reducing the possibility of stress concentration. This helps extend the service life of the battery cell 22 and the elastic elements 4, and improves the reliability of the entire battery pack.

[0041] Because the protruding inclined surfaces 44 on the two adjacent corners of the rectangular elastic element 4 extend in opposite directions, this opposing locking design allows the cell unit 22 to be subjected to frictional forces in two opposite directions simultaneously when subjected to forces from the diagonal direction, thus holding it more firmly 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.

[0042] The rectangular shape and standardized raised bevel 44 design make the manufacturing of the elastic element 4 simpler and more efficient. At the same time, this design also facilitates layout and assembly within the battery pack, reducing production costs and assembly complexity.

[0043] In summary, this preferred embodiment, which provides raised inclined surfaces 44 at the four corners of the rectangular elastic member 4 to contact and cooperate with the cell unit 22 or the end plate 21, not only improves the fixing effect of the cell unit 22, but also enhances the overall performance and reliability of the battery pack.

[0044] For example, the constraint member 3 is a PP plastic part, which has a low surface tension. Therefore, there are various methods to adjust the surface tension of the constraint member 3 on the side away from the battery cell 22, which can be mainly categorized into three types: physical methods, chemical methods, and heat treatment methods. The specific adjustment methods are as follows:

[0045] I. Physical Methods

[0046] Spraying lubricant: Spraying a uniform lubricating film onto the plastic surface to increase its surface tension.

[0047] Advantages: It does not easily form an oxide layer, making it suitable for steel mold products and products that require surface lubrication.

[0048] Physical vapor deposition: Metallic gases are deposited onto the surface of plastics using vacuum evaporation technology to form a hard and dense metallic layer, thereby increasing surface tension.

[0049] Application: Suitable for plastic parts with high requirements for surface hardness and wear resistance.

[0050] II. Chemical Methods

[0051] Surface oxidation treatment: Applying oxidizing solutions such as acids, alkalis or peroxides to the plastic surface to oxidize it, increase polarity, and thus improve surface tension.

[0052] Precautions: Select a suitable oxidation solution to reduce the impact on raw materials and avoid affecting the mechanical properties of the product.

[0053] Use of surfactants: Surfactants are compounds in organic chemistry that can form a very thin film on the surface of plastics, increasing surface tension.

[0054] Precautions: The amount of activator used should be appropriate. Too much may affect the mechanical properties and weather resistance of the plastic.

[0055] Radiation treatment: By using methods such as electron beam radiation, ultraviolet radiation, or ion radiation, active functional groups such as free radicals are generated on the plastic surface, increasing surface polarity and thus increasing surface tension.

[0056] Application: The specific radiation method to be chosen should be determined based on factors such as the material, shape, size of the product, and the radiation equipment.

[0057] III. Heat Treatment Methods

[0058] High-temperature boiling: The plastic parts are placed in a heating container and boiled with deionized water. The high temperature removes residual mold release agents, grease, and other impurities from the surface of the plastic parts, while also increasing surface tension.

[0059] Precautions: When boiling, 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.

[0060] Taking all factors into consideration, different methods for adjusting surface tension should be selected for different types of plastics and different production requirements. For example, physical vapor deposition can be considered for plastic parts that need to improve wear resistance and hardness; while high-temperature boiling or other methods can be used for plastic parts that need to remove surface impurities.

[0061] Evaluation of results: After adopting the above methods, 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.

[0062] Precautions: When adjusting the surface tension of plastic parts, environmental protection and safety should also be considered. For example, when using chemical methods, environmentally friendly oxidizing solutions and activators should be selected; during heat treatment, fire prevention and explosion-proof safety measures should be taken.

[0063] In a preferred embodiment, see Figure 2 As shown, the elastic element 4 includes a first hard outer layer 41, a second hard outer layer 42, and an elastic core layer 43 located between the first hard outer layer 41 and the second hard outer layer 42. The first hard outer layer 41 and the second hard outer layer 42 provide a robust outer layer protection for the elastic element 4, effectively resisting external impacts and wear. This hard outer layer can extend the service life of the elastic element 4 and reduce damage caused by long-term use or harsh environments. The elastic core layer 43, located between the two hard outer layers, is the core part of the elastic element 4, responsible for providing the required elasticity and cushioning effect. The elastic core layer 43 can be made of a material with good resilience and durability to ensure that it can quickly return to its original shape under pressure or impact and effectively absorb and disperse energy.

[0064] In a preferred embodiment, the first and second rigid outer layers 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 element 4 can meet the battery pack's requirements for stability, durability, elasticity, and safety.

[0065] Material selection for the first and second hard outer layers.

[0066] PC (polycarbonate): With high strength, high transparency, good heat resistance and impact resistance, it is one of the ideal materials for manufacturing rigid surfaces.

[0067] PBT (polybutylene terephthalate): It has excellent heat resistance, chemical resistance and mechanical strength, and is suitable for environments that need to withstand high temperature or chemical corrosion.

[0068] Epoxy board: It has excellent insulation, heat resistance and mechanical strength, and is often used in the structural components of electronic products.

[0069] PA (nylon or polyamide): wear-resistant, oil-resistant, self-lubricating, and has high mechanical strength and good thermal stability.

[0070] The selection of these materials ensures that the first and second hard outer layers have sufficient hardness and strength to provide effective support and protection for the cell unit 22 or the end plate 21.

[0071] Material selection for the elastic core layer.

[0072] 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.

[0073] Polyurethane: It also has good elasticity and abrasion resistance, as well as high load-bearing capacity and resilience.

[0074] PI foam: also known as polyimide foam, has excellent high temperature resistance, chemical resistance and flame retardancy, while maintaining a certain degree of elasticity and softness.

[0075] MPP (Modified Polypropylene): Modification improves the heat resistance, rigidity, and impact resistance of polypropylene, making it suitable for applications requiring high strength and heat resistance.

[0076] Melamine: Although melamine itself is not used directly as an elastic material, its modified products or composites with other materials may have a certain degree of elasticity and strength, depending on the formulation and process.

[0077] The selection of these materials ensures that the elastic core layer can provide sufficient elasticity and cushioning to absorb and disperse the energy generated by the cell unit 22 during vibration or impact, thereby protecting the cell unit 22 from damage.

[0078] In summary, by rationally selecting the materials of the first hard outer layer 41, the second hard outer layer 42, and the elastic core layer 43, it can be ensured that the elastic element 4 performs optimally and effectively in the battery pack.

[0079] In a preferred embodiment, see Figures 4 to 6 As shown, a limiting structure is provided between the end plate 21 and the stop 1 to limit the relative position of the end plate 21 and the stop 1.

[0080] By limiting the relative positions of the end plate 21 and the stop 1, the limiting structure can prevent them from moving or misaligning due to vibration, impact or other external factors during use, which helps to maintain the stability of the internal structure of the battery pack and ensures the correct fit and effective connection between the components.

[0081] Furthermore, the relative positional accuracy between components is crucial during the design and manufacturing process of the battery pack. The limiting structure ensures that the end plate 21 and the stop 1 achieve the predetermined positional accuracy during assembly, thereby meeting the overall performance requirements of the battery pack.

[0082] In some cases, misalignment or loosening of the end plate 21 and the stop 1 may lead to short circuits, leakage, or other safety issues inside the battery pack. The design of the limiting structure can reduce this risk and improve the safety performance of the battery pack.

[0083] The specific form of the limiting structure can be selected based on the battery pack design requirements and manufacturing process. Here are some possible implementation methods:

[0084] Slots and buckles: Slots are designed on end plate 21, and corresponding buckles are designed on stop 1. During assembly, the buckles are inserted into the slots, thereby restricting the relative positions of end plate 21 and stop 1.

[0085] Protrusions and grooves: Protrusions and grooves are designed on the contact surfaces of end plate 21 and stop 1, respectively. The positioning and fixing of end plate 21 and stop 1 are achieved through the cooperation of the protrusions and grooves.

[0086] Threaded connection: Threaded holes are provided on end plate 21 or stop 1, and the two are connected together by threaded fasteners (such as screws). This method not only has a limiting function, but also provides additional tightening force.

[0087] Elastic buckle: The buckle structure is designed using the properties of elastic materials. During assembly, the buckle undergoes elastic deformation under the action of external force and embeds itself into the corresponding slot. After the external force is removed, it returns to its original shape to fix the end plate 21 and the stop 1.

[0088] In a preferred embodiment, see Figures 4 to 6 As shown, the limiting structure includes a limiting block 11 arranged on the stop 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 stop 1, and a second limiting strip 212 arranged on the end plate 21 and corresponding to the first limiting strip 12.

[0089] The limiting block 11 is arranged on the stop 1, typically consisting of one or more protruding portions with a specific shape and size. The limiting groove 211 is arranged on the end plate 21, corresponding to the limiting block 11, and consists of one or more grooves or holes capable of accommodating the limiting block 11. When the stop 1 is installed on the end plate 21, the limiting block 11 will naturally slide into or engage with the limiting groove 211, thereby restricting the movement of the stop 1 in the horizontal or vertical direction. This engagement method is simple and effective, enabling quick positioning and fixation of the stop 1.

[0090] The first limiting strip 12 is arranged on the stop 1, typically consisting of one or more extended protrusions, the shape and size of which are determined according to design requirements. The second limiting strip 212 is arranged on the end plate 21, corresponding to the first limiting strip 12, and is a groove, slot, or another protrusion that mates with it. The first limiting strip 12 and the second limiting strip 212 can be fitted together in a sliding fit, a snap-fit ​​fit, or a clearance fit, depending on the design requirements. This fit can form one or more parallel constraint surfaces between the stop 1 and the end plate 21, further restricting their relative movement.

[0091] For example, see Figure 4 and Figure 5 As shown, the first limiting strip 12 and the second limiting strip 212 are fitted with a clearance. Four first limiting strips 12 are arranged vertically and horizontally on the stop 1, and three second limiting strips 212 are provided on the end plate 21, which are fitted with the first limiting strips 12 with corresponding clearances.

[0092] In a preferred embodiment, the easily detachable battery pack assembly further includes a base plate and two side plates (not shown in the figure). The front and rear ends of the side plates are welded and fixedly connected to two baffles 1. The base plate, the two side plates, and the two baffles 1 together form a receiving space for accommodating the battery module 2. This arrangement not only improves the structural strength and stability of the battery pack assembly but also ensures the safety and protection of the battery module within it.

[0093] The base plate, as the bottom support structure of the battery pack assembly, bears the weight of the entire battery pack assembly as well as impacts and vibrations from below. Therefore, the base plate needs to have sufficient strength and rigidity to ensure the stable operation of the battery pack under various operating conditions. Simultaneously, the base plate may also directly contact the bottom of the battery module 2, further improving the fixing effect of the battery module by increasing the contact area and friction. For example, a liquid cooling plate is arranged on the base plate, and thermally conductive adhesive 5 is coated on the liquid cooling plate; the battery module 2 is placed on the liquid cooling plate coated with thermally conductive adhesive.

[0094] Two side plates are located on the left and right sides of the battery pack assembly, respectively, forming a closed or semi-closed enclosure together with the base plate and the retainer 1. The main function of the side plates is to restrict the movement of the battery module 2 in the left and right directions, preventing it from falling out of its predetermined position due to vibration or impact. In addition, the side plates can also provide extra protection against damage to the battery module 2 from external objects. To increase the strength and stability of the side plates, they are usually welded and fixedly connected to the retainer.

[0095] In this embodiment, the stop 1 not only restricts the position of the end plate 21 (as described above), but also serves as a key component connecting the side plate. The welded and fixed connection between the stop 1 and the side plate ensures the robustness and integrity of the entire battery pack structure. Simultaneously, the stop 1 also acts as a vertical support point for the battery module 2, providing comprehensive protection for the battery module together with the base plate and side plate.

[0096] The base plate, two side plates, and two retainers 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 battery modules 2 to ensure that the battery modules 2 can be placed tightly inside, while leaving the necessary space for heat dissipation and maintenance.

[0097] By adding a base plate and two side plates, and integrating them with the retainer 1, this preferred embodiment provides a more complete and robust structural framework for the battery pack assembly. This framework 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 within it. Furthermore, this design facilitates subsequent expansion and maintenance of the battery pack assembly.

[0098] In a preferred embodiment, a gap is left between the bottom surface of the constraint member 3 and the top surface of the cell unit 22, so that the structural adhesive can pass through the adhesive application hole and enter between the top surface of the cell unit 22 and the bottom surface of the constraint member 2.

[0099] In a second aspect, the present invention provides a vehicle including the aforementioned easily removable battery pack assembly.

[0100] The above embodiments are merely preferred embodiments provided to fully illustrate the present invention, and the scope of protection of the present invention is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present invention are all within the scope of protection of the present invention.

Claims

1. An easily detachable battery pack assembly, characterized in that: The battery module (2) includes two stops (1), a battery module (2) arranged between the two stops (1), and a constraint member (3) connected to the upper surface of the battery module (2). The battery module (2) includes two end plates (21) and a number of battery cells (22) arranged in parallel between the two end plates (21). Elastic members (4) are arranged between the battery cells (22) and the end plates (21) and / or between adjacent battery cells (22). The constraint member (3) is used to restrict the position of the cell unit (22) in the vertical direction. The two ends of the constraint member (3) are detachably connected to two stops (1). The constraint member (3) is provided with a glue-applying through hole (31) at the position corresponding to the top of the cell unit (22). The surface tension of the constraint member (3) on the side that contacts the cell unit (22) is lower than the surface tension of the constraint member (3) on the side that is away from the cell unit (22).

2. The easily detachable battery pack assembly according to claim 1, characterized in that: The elastic element (4) has multiple raised inclined surfaces (44) on the side that contacts the cell unit (22) or end plate (21). At least two raised inclined surfaces (44) extend in opposite directions. The contact between the raised inclined surfaces (44) and the cell unit (22) or end plate (21) increases the friction force and prevents the cell unit (22) from shifting.

3. The easily detachable battery pack assembly according to claim 2, characterized in that: The elastic element (4) is rectangular, and each of the four corners of the rectangular elastic element (4) is provided with a raised inclined surface (44) that contacts and cooperates with the battery cell unit (22) or the end plate (21). The extended directions of the raised inclined surfaces (44) on two adjacent corners are opposite.

4. The easily detachable battery pack assembly according to claim 1, characterized in that: The elastic element (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).

5. The easily detachable battery pack assembly according to claim 4, characterized in that: The first hard surface layer (41) and the second hard surface layer (42) are made of PC, PBT, epoxy board or PA, and the elastic core layer (43) is made of 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 is provided between the end plate (21) and the stop (1) to limit the relative position of the end plate (21) and the stop (1).

7. The easily detachable battery pack assembly according to claim 6, characterized in that: The limiting structure includes a limiting block (11) arranged on the stop (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 stop (1), and a second limiting strip (212) arranged on the end plate (21) and corresponding to the first limiting strip (12).

8. The easily detachable battery pack assembly according to claim 1, characterized in that: It also includes a base plate and two side plates. The two ends of the side plates are fixedly connected to two baffles (1). The base plate, the two side plates and the two baffles together form a 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 constraint member (3) and the top surface of the cell unit (22).

10. A vehicle, characterized in that, Includes the easily detachable battery pack assembly as described in any one of claims 1 to 9.

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