Battery pack

Abstract

This invention belongs to the field of battery technology and discloses a battery pack, including a base, a connecting substrate, and multiple sequentially stacked modular substrate assemblies. The modular substrate assemblies are disposed on the base, and the connecting substrates are disposed between adjacent modular substrate assemblies, with adjacent modular substrate assemblies being detachably connected via the connecting substrates. By using the base to support the modular substrate assemblies and the connecting substrates to achieve detachable connection between adjacent components, this invention overcomes the limitations of the fixed structure of traditional cabinet-type power supplies, significantly simplifies disassembly and relocation processes, improves outdoor deployment efficiency, and reduces transportation space occupation and maintenance / disassembly difficulty, effectively controlling overall costs.

Description

Technical Field

[0001] This invention relates to the field of battery technology, and in particular to a battery pack. Background Technology

[0002] In the field of outdoor power supply for new energy, traditional outdoor power supplies mostly adopt a cabinet-style structure design. The overall structure of this type of power supply is relatively fixed, lacking flexible disassembly and assembly for compatibility. Due to the inherent structure, the movement, disassembly, and assembly of the equipment all require complex processes and specialized tools. This not only significantly reduces the deployment efficiency in outdoor scenarios and makes it difficult to quickly respond to temporary power supply needs, but also increases the space occupation cost and handling difficulty during transportation. At the same time, the fixed structure requires the entire equipment to be disassembled for maintenance, further increasing the maintenance and time costs, resulting in high overall costs for transportation and maintenance. Summary of the Invention

[0003] The main objective of this invention is to provide a battery pack that addresses the technical problems of fixed outdoor power cabinet structures in new energy sources, which lack flexible disassembly and reassembly capabilities, resulting in cumbersome disassembly and relocation, low deployment efficiency, and high overall transportation and maintenance costs.

[0004] To achieve the above-mentioned objectives, the present invention proposes a battery pack, including a base, a connecting substrate, and a plurality of sequentially stacked module substrate assemblies; The module substrate assembly is disposed on the base, the connecting substrate is disposed between adjacent module substrate assemblies, and adjacent module substrate assemblies are detachably connected through the connecting substrate.

[0005] Furthermore, the module substrate assembly includes multiple battery module assemblies and multiple battery module substrates, the battery module substrates being disposed on the battery module assemblies, and the multiple battery module assemblies and multiple battery module substrates being stacked alternately in sequence.

[0006] Furthermore, the module substrate assembly also includes a connecting post, which is detachably connected to the battery module assembly and detachably connected to the connecting substrate.

[0007] Furthermore, the battery module assembly is composed of multiple battery module arrays arranged together. Each battery module includes a battery cell and multiple strain clamping assemblies. The battery cell is disposed between adjacent strain clamping assemblies. The battery module substrate is disposed on the strain clamping assemblies and is engaged with the strain clamping assemblies.

[0008] Furthermore, the strain clamping assembly includes a snap-fit ​​block and a strain clamping body connected to the snap-fit ​​block. The snap-fit ​​block snaps into the battery module substrate, the strain clamping body contacts the battery module substrate, and the battery cell is located between adjacent strain clamping bodies.

[0009] Furthermore, the snap-fit ​​block is provided with multiple through holes, and the connecting post is connected through the through holes.

[0010] Furthermore, the strain clamping body includes a first strain plate, a second strain plate, and a plurality of strain bodies. The strain bodies are connected between the first strain plate and the second strain plate. One end of the first strain plate and the second strain plate are respectively connected to the snap-fit ​​block. The ends of the first strain plate and the second strain plate away from the snap-fit ​​block are open ends.

[0011] Furthermore, the strain body includes a first fixed plate, a second fixed plate, and a strain buffer component. The strain buffer component is connected to the first strain plate and the second strain plate respectively, and the strain buffer component is disposed between the first fixed plate and the second fixed plate arranged opposite to each other.

[0012] Furthermore, the strain buffer component includes a strain base plate, a plurality of strain connecting plates and a plurality of third strain plates. The strain base plate and the third strain plates are arranged at intervals between the first fixing plate and the second fixing plate. The strain base plate is located between adjacent third strain plates. The third strain plates are connected to the first strain plate and the second strain plate respectively through the strain connecting plates.

[0013] Furthermore, the third strain plate has a bent protrusion on the side away from the strain substrate, and the strain connecting plate is disposed on the bent protrusion and connected to the first strain plate and the second strain plate respectively.

[0014] Furthermore, the strain clamping assembly also includes a plurality of spaced-apart plates, which are disposed on the side of the first strain plate away from the strain body.

[0015] Furthermore, the battery module substrate is provided with a first mounting groove for placing the battery module assembly, and the first mounting groove is provided with a snap-fit ​​hole for snapping the battery module assembly into place.

[0016] Furthermore, the connecting substrate is provided with a second mounting groove for placing the battery module assembly. The second mounting groove is provided with corresponding positioning holes and multiple mounting holes, and the connecting post is inserted into the mounting holes and connected to the connecting substrate.

[0017] Furthermore, a third mounting groove is provided on the base, and the module substrate assembly is disposed in the third mounting groove and connected to the base.

[0018] Furthermore, the base has a polygonal structure, and a first protrusion is formed between adjacent corners of the base. The tangents at both ends of the first protrusion are at the same angle as the contour lines of the adjacent corners.

[0019] Furthermore, the connecting substrate has a polygonal structure, and a second protrusion is formed between adjacent corners of the connecting substrate. The tangents at both ends of the second protrusion are complementary to the angles formed by the contour lines of the adjacent corners.

[0020] Furthermore, the battery module substrate has a polygonal structure, and a third protrusion is formed between adjacent corners of the battery module substrate. The tangents at both ends of the third protrusion are complementary to the angles formed by the contour lines of the adjacent corners.

[0021] Furthermore, the heights of the multiple module substrate assemblies differ, and each module substrate assembly is stacked at a different angle via the connecting substrate.

[0022] Beneficial effects: This invention discloses a battery pack comprising a base, a connecting substrate, and a plurality of sequentially stacked modular substrate assemblies. The modular substrate assemblies are disposed on the base, and the connecting substrates are disposed between adjacent modular substrate assemblies, with adjacent modular substrate assemblies being detachably connected via the connecting substrates. By supporting the modular substrate assemblies on the base and enabling detachable connection between adjacent components via the connecting substrates, this design overcomes the limitations of the fixed structure of traditional cabinet-type power supplies, significantly simplifies disassembly and relocation processes, improves outdoor deployment efficiency, and reduces transportation space occupation and maintenance / disassembly difficulty, effectively controlling overall costs. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of a battery pack according to an embodiment of the present invention; Figure 2 This is an exploded view of a module substrate assembly according to an embodiment of the present invention; Figure 3 This is a schematic diagram of a battery module assembly according to an embodiment of the present invention; Figure 4 This is a schematic diagram of a battery module according to an embodiment of the present invention; Figure 5 This is a schematic diagram of a strain clamping assembly according to an embodiment of the present invention; Figure 6 This is an embodiment of the present invention. Figure 5 Enlarged view of a portion at point A; Figure 7 This is a schematic diagram of a base according to an embodiment of the present invention; Figure 8 This is a schematic diagram of a connection substrate according to an embodiment of the present invention; Figure 9 This is a schematic diagram of a battery module substrate according to an embodiment of the present invention; Figure 10 This is a schematic diagram of the wind vector of a battery pack according to an embodiment of the present invention; Figure 11 This is a schematic diagram of a module of a battery pack according to an embodiment of the present invention; Figure 12 This is an exploded view of a battery pack module according to an embodiment of the present invention; Figure 13 This is a schematic diagram of module two of the battery pack according to an embodiment of the present invention; Figure 14 This is an exploded view of module two of the battery pack according to an embodiment of the present invention; Figure 15 This is a schematic diagram of module three of a battery pack according to an embodiment of the present invention; Figure 16 This is an exploded view of a battery pack module according to an embodiment of the present invention; Figure 17 This is a schematic diagram of module four of a battery pack according to an embodiment of the present invention; Figure 18 This is an exploded view of module four of a battery pack according to an embodiment of the present invention.

[0024] in: 1. Base; 2. Connecting substrate; 3. Module substrate assembly; 4. Second mounting slot; 5. Positioning hole; 6. Mounting hole; 7. Third mounting slot; 8. First protrusion; 9. Second protrusion; 30. Battery module assembly; 31. Battery module base plate; 32. Connecting post; 33. Battery module; 34. First mounting slot; 35. Snap-fit ​​hole; 36. Third protrusion; 330. Battery cell; 331. Strain gauge clamping assembly; 3310. Snap-fit ​​block; 3311. Strain gauge clamping body; 3312. Through hole; 3313. Divider plate; 3314. First strain gauge; 3315. Second strain gauge; 3316. Strain body; 3317. First fixing plate; 3318. Second fixing plate; 3319. Strain buffer component; 3320, strain substrate; 3321, strain connection plate; 3322, third strain plate.

[0025] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0026] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0027] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0028] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0029] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0030] Reference Figures 1-4 This embodiment provides a battery pack, including a base 1, a connecting substrate 2, and a plurality of sequentially stacked module substrate assemblies 3; The module substrate assembly 3 is disposed on the base 1, and the connecting substrate 2 is disposed between adjacent module substrate assemblies 3, and adjacent module substrate assemblies 3 are detachably connected through the connecting substrate 2.

[0031] In the above embodiment, the battery pack is a portable, mobile, outdoor soft-pack battery pack without a casing, including a base 1, a connecting substrate 2, and multiple modular substrate assemblies 3. The base 1 refers to the bottommost support unit of the entire battery pack system, and its upper surface serves as the stacking starting surface. The connecting substrate 2 is an intermediate connector disposed between any two adjacent modular substrate assemblies 3, and its upper and lower surfaces form detachable mechanical connections with the upper and lower modular substrate assemblies 3 respectively. The modular substrate assembly 3 is the basic unit constituting the main function of the battery pack. Each modular substrate assembly 3 integrates a soft-pack cell 330 and related electrical connection structures, and has independent energy storage capacity. Multiple modular substrate assemblies 3 are stacked axially on the base 1 in the vertical direction to form a longitudinally extending integral structure. Adjacent modular substrate assemblies 3 do not directly contact each other, but are separated and connected by a connecting substrate 2. The physical heights of each modular substrate assembly 3 in the vertical direction are different, that is, there is a height difference. This non-uniform height design means that during the stacking process, even if the central axes of each component coincide, their outer contours will form a specific spatial configuration due to the staggered heights. This battery pack adopts a modular stacking structure without a compartment. The base 1 supports the module base plate assembly 3, and the connecting base plate 2 enables the detachable connection of adjacent components. This breaks through the fixed structure limitations of traditional cabinet-type power supplies, greatly simplifies the disassembly, assembly, and relocation process, and improves the efficiency of outdoor deployment. At the same time, the modular design reduces the space occupied during transportation and the difficulty of maintenance and disassembly, effectively controlling the overall cost.

[0032] Reference Figures 1-3 In one embodiment, the module substrate assembly 3 includes a plurality of battery module assemblies 30 and a plurality of battery module substrates 31, wherein the battery module substrates 31 are disposed on the battery module assemblies 30, and the plurality of battery module assemblies 30 and the plurality of battery module substrates 31 are arranged in a staggered manner.

[0033] In the above embodiments, the module substrate assembly 3 is a composite unit composed of multiple battery module assemblies 30 and multiple battery module substrates 31, serving as a layer in the overall stacking system. Inside the module substrate assembly 3, the battery module assemblies 30 and battery module substrates 31 are arranged in an alternating manner, forming a multi-layered internal structure. The bottommost battery module assembly 30 in the bottommost module substrate assembly 3 is not placed directly on the ground, but is embedded and connected to the mounting groove provided in the base 1, thereby achieving a stable connection with the base 1. For the other module substrate assemblies 3 stacked above, their bottommost battery module assemblies 30 do not directly contact the module substrate assemblies 3 below them, but are placed on the connecting substrate 2 located between them; that is, the starting layer (bottom layer) of each upper module substrate assembly 3 is a battery module assembly 30, which sits directly on the connecting substrate 2 on top of the adjacent module substrate assembly 3 below it. The staggered stacking structure enhances the internal stability and heat dissipation performance of the module substrate assembly 3. At the same time, by precisely placing each layer of battery module assembly 30 on the base 1 or connecting substrate 2, the vertical alignment and mechanical transmission of the overall stacking structure are ensured, thereby improving system reliability and ease of assembly.

[0034] Reference Figures 1-2 In one embodiment, the module substrate assembly 3 further includes a connecting post 32, which is detachably connected to the battery module assembly 30 and is detachably connected to the connecting substrate 2.

[0035] In the above embodiment, the connecting post 32 is detachably connected to the battery module assembly 30 and passes through the battery module assembly 30 and the battery module substrate 31 above it in a vertical direction. After the connecting post 32 has passed through, its top end will slightly protrude from the surface of the uppermost battery module assembly 30, forming a protruding section that can be used for docking. This protruding section is designed to be inserted into the socket of the connecting substrate 2, thereby establishing a physical connection between the module substrate assembly 3 and the connecting substrate 2. The specific connection method includes two typical cases: First, the connecting posts 32 at the top of each of the two adjacent module substrate assemblies 3 are simultaneously aligned with the same set of corresponding sockets on the connecting substrate 2 and inserted from the top and bottom sides respectively, with each insertion depth being about half the depth of the socket, to achieve bidirectional fitting; Second, the connecting posts 32 of the two adjacent module substrate assemblies 3 are staggered and inserted into sockets at different positions on the connecting substrate 2, as long as it can ensure that the two adjacent module substrate assemblies 3 maintain a stable detachable connection state through the connecting substrate 2. For the module substrate assembly 3 located at the bottom of the entire stacked structure, the bottom end of its connecting post 32 is not suspended, but directly contacts the base 1, or more preferably, is inserted into the corresponding hole pre-set on the base 1, thereby firmly anchoring the bottom module substrate assembly 3 to the base 1. By having the connecting post 32 penetrate the stacked unit and be inserted into the connecting substrate 2 and the base 1, a stable and reliable detachable connection is achieved within the module and between layers, improving the overall structural rigidity and assembly efficiency.

[0036] Reference Figures 1-4 In one embodiment, the battery module assembly 30 is composed of an array of multiple battery modules 33. Each battery module 33 includes a cell 330 and a plurality of strain clamping assemblies 331. The cell 330 is disposed between adjacent strain clamping assemblies 331. The battery module substrate 31 is disposed on the strain clamping assemblies 331 and is engaged with the strain clamping assemblies 331.

[0037] In the above embodiments, the battery module assembly 30 is a functional integrated unit composed of multiple battery modules 33 arranged in a specific geometric manner. Each battery module 33 itself includes several battery cells 330 and strain clamping components 331 for fixing and buffering. The battery cells 330 are composed of two series-connected pouch cells 330 forming a basic energy unit, and multiple cells 330 can be configured in series or parallel according to capacity or voltage requirements. The strain clamping components 331 are rigid-flexible structural components disposed between adjacent battery cells 330 to apply pre-tightening force to the battery cells 330 and absorb their volume deformation during charging and discharging. The four battery modules 33 are arranged in a "cross-shaped array" within the battery module assembly 30, that is, two battery modules 33 are symmetrically arranged along the transverse axis, and the other two are symmetrically arranged along the vertical axis, with the two sets of directions perpendicular to each other and intersecting in the central region. The intersection of this cross-shaped arrangement forms a stable geometric center point, which is designed as a key area for forming a snap-fit ​​with the battery module substrate 31. The outer edge of each strain clamping component 331 is embedded in the corresponding slot or hole of the battery module substrate 31, thereby firmly locking the entire cross-shaped battery module 33 onto the battery module substrate 31, improving the structural stability, heat dissipation uniformity and mechanical reliability of the battery module assembly 30.

[0038] Reference Figures 1-5 In one embodiment, the strain clamping assembly 331 includes a snap-fit ​​block 3310 and a strain clamping body 3311 connected to the snap-fit ​​block 3310. The snap-fit ​​block 3310 is snapped into the battery module substrate 31, the strain clamping body 3311 is in contact with the battery module substrate 31, and the battery cell 330 is located between adjacent strain clamping bodies 3311.

[0039] In the above embodiment, the strain gauge clamping assembly 331 consists of two parts: a locking block 3310 and a strain gauge clamping body 3311. The locking block 3310 is a rigid connector, its main function being to achieve mechanical locking with the battery module substrate 31. The strain gauge clamping body 3311 possesses certain elastic or compressible characteristics, directly contacting the battery cell 330 to apply preload and absorb the volume expansion of the battery cell 330 during charge-discharge cycles. The height of the locking block 3310 is designed to be greater than the height of the strain gauge clamping body 3311, so that when the strain gauge clamping assembly 331 is fully installed, the top surface of the strain gauge clamping body 3311 is in close contact with the bottom surface of the battery module substrate 31, while the locking block 3310 extends upward and embeds into the locking hole 35 provided inside the battery module substrate 31. Multiple snap-fit ​​blocks 3310 are simultaneously inserted into corresponding snap-fit ​​holes 35 of the same battery module substrate 31, and abut against each other or form an interference fit with the hole wall within the hole, thereby achieving overall clamping and preventing loosening or displacement. Furthermore, the snap-fit ​​blocks 3310 are provided with multiple through holes 3312, which penetrate vertically through the body of the snap-fit ​​blocks 3310; the connecting posts 32 pass through these through holes 3312 from above or below, achieving axial through-connection with the strain clamping assembly 331. Thus, the connecting posts 32 not only form a positioning and force transmission path with the snap-fit ​​blocks 3310 through the through holes 3312, but also indirectly integrate the battery module substrate 31, the strain clamping assembly 331, and the internal battery cells 330 into a force-coordinated whole, ensuring structural integrity and electrical stability are maintained even without external enclosure constraints.

[0040] Reference Figures 1-6 In one embodiment, the strain clamping body 3311 includes a first strain plate 3314, a second strain plate 3315, and a plurality of strain bodies 3316. The strain bodies 3316 are connected between the first strain plate 3314 and the second strain plate 3315. One end of the first strain plate 3314 and the second strain plate 3315 are respectively connected to the snap-fit ​​block 3310. The ends of the first strain plate 3314 and the second strain plate 3315 that are away from the snap-fit ​​block 3310 are open ends.

[0041] In the above embodiment, the strain clamping body 3311 is composed of a first strain plate 3314, a second strain plate 3315, and multiple strain bodies 3316. The first strain plate 3314 and the second strain plate 3315 are both rigid or semi-rigid straight plate-shaped structural components, arranged parallel to each other. One end of each is fixedly connected to a locking block 3310, while the other end, away from the locking block 3310, is a free and open end, not connected to any other components or to each other. This open structural design allows the first strain plate 3314 and the second strain plate 3315 to undergo relatively independent small displacements or elastic bending when subjected to external forces. The strain bodies 3316, as elastic functional units, are disposed between the first strain plate 3314 and the second strain plate 3315, and... Multiple strain gauges are spaced apart along the plate surface to connect the two plates and provide recoverable compression resilience. When the battery cell 330 expands in volume due to charging and discharging, it pushes the adjacent second strain gauges 3315 to both sides, and then transmits the force to the first strain gauge 3314 through the strain gauge body 3316. The entire strain gauge clamping body 3311 thus generates controllable elastic deformation, absorbs stress, and maintains a continuous clamping force on the battery cell 330. The open double-plate structure, combined with the strain gauge body 3316, gives the strain gauge clamping body 3311 excellent elastic deformation capability, which can effectively absorb the expansion stress of the battery cell 330 and maintain a stable clamping force.

[0042] Reference Figures 1-6 In one embodiment, the strain body 3316 includes a first fixing plate 3317, a second fixing plate 3318, and a strain buffer component 3319. The strain buffer component 3319 is connected to the first strain plate 3314 and the second strain plate 3315 respectively, and the strain buffer component 3319 is disposed between the oppositely arranged first fixing plate 3317 and second fixing plate 3318.

[0043] In the above embodiment, the strain body 3316 is composed of a first fixed plate 3317, a second fixed plate 3318, and a strain buffer component 3319 disposed between them. The first fixed plate 3317 and the second fixed plate 3318 are rigid or semi-rigid flat plate structures, arranged parallel to each other to form a receiving space. The strain buffer component 3319 is installed between the opposing first fixed plate 3317 and the second fixed plate 3318, serving as the main elastic deformation element. One side of the strain buffer component 3319 is connected to the first strain plate 3314, and the other side is connected to the second strain plate 3315, thereby establishing a mechanical transmission path between the first strain plate 3314 and the second strain plate 3315. When the cell 330 undergoes a volume change and exerts a thrust on the second strain plate 3315, this force is transmitted through the second strain plate 3315 to the strain buffer component 3319 connected to it, and then through the strain buffer component 3319 to the first strain plate 3314, and finally to the snap-fit ​​block 3310 and the external support structure. During this process, the strain buffer component 3319 located between the first fixing plate 3317 and the second fixing plate 3318 undergoes compression, bending or shear deformation, absorbing and buffering the dynamic stress from the cell 330. At the same time, it returns to its original shape after unloading, providing a continuous pre-tightening reaction force to ensure that the cell 330 can still operate safely and stably in an outdoor environment without cabin constraints.

[0044] Reference Figures 1-6 In one embodiment, the strain buffer component 3319 includes a strain base plate 3320, a plurality of strain connecting plates 3321, and a plurality of third strain plates 3322. The strain base plate 3320 and the third strain plates 3322 are arranged at intervals between the first fixing plate 3317 and the second fixing plate 3318. The strain base plate 3320 is located between adjacent third strain plates 3322. The third strain plates 3322 are connected to the first strain plate 3314 and the second strain plate 3315 respectively through the strain connecting plates 3321.

[0045] In the above embodiment, the strain buffer component 3319 is composed of a strain base plate 3320, a plurality of strain connecting plates 3321, and a plurality of third strain plates 3322. The strain base plate 3320 is a rigid straight plate, serving as the central axis of symmetry of the entire buffer structure. The third strain plates 3322 are arranged in pairs, with the two third strain plates 3322 in each pair located on opposite sides of the strain base plate 3320, and arranged in a mirror-symmetrical manner with the strain base plate 3320 as the center of symmetry. The third strain plate 3322 is an elastically bendable protrusion. Each third strain plate 3322 itself is composed of two spaced-apart bent plates, and the entire plate forms an outwardly bent protrusion structure on the side away from the strain base plate 3320. The strain base plate 3320 is sandwiched between two adjacent third strain plates 3322, and all these components are housed within the relative space defined by the first fixing plate 3317 and the second fixing plate 3318. A third strain plate 3322 is connected to the first strain plate 3314 via a strain connecting plate 3321 on its curved protrusion. Another symmetrically arranged third strain plate 3322 is connected to the second strain plate 3315 via another strain connecting plate 3321 on its curved protrusion. This allows the first strain plate 3314 or the second strain plate 3315 to move under force, pulling or pushing the corresponding third strain plate 3322 via the strain connecting plate 3321, causing further deformation or recovery of its curved protrusion. The strain plate substrate 3320 acts as an intermediate support, coordinating the movement of both sides and maintaining structural symmetry. When the pouch cell 330 expands, it pushes the second strain plate 3315, causing the curved protrusion of the third strain plate 3322 to be flattened via the strain connecting plate 3321, absorbing energy. When the expansion force decreases, the curved protrusion rebounds, applying a preload force to the cell 330 in the opposite direction, ensuring it remains in a stable clamped state.

[0046] Reference Figures 1-6 In one embodiment, the strain clamping assembly 331 further includes a plurality of spaced-apart partition plates 3313, which are disposed on the side of the first strain plate 3314 away from the strain body 3316.

[0047] In the above embodiment, the branch plate 3313 is a functional reinforcing plate disposed on the outside of the strain clamping assembly 331 to enhance the overall structural rigidity. Multiple branch plates 3313 are arranged at intervals along the length direction and fixedly installed on the surface of the first strain plate 3314 away from the strain body 3316. Since the strain body 3316 is located between the first strain plate 3314 and the second strain plate 3315, and the second strain plate 3315 faces the battery cell 330, the outer side of the first strain plate 3314 is the outermost edge region of the entire battery module 33. The placement of the branch plate 3313 in this position makes the entire battery module 33 exhibit a typical I-shaped configuration in cross-section: the first strain plate 3314 and the second strain plate 3315 form the upper and lower flanges, the strain body 3316 and connecting structure in the middle form the web, and the branch plate 3313 further strengthens the local rigidity and overall bending resistance of the outer flanges. This I-shaped layout is not limited to a single direction, but is constructed simultaneously on multiple outer surfaces of the battery module 33, thereby significantly improving its resistance to external disturbances in three-dimensional space. Especially in outdoor cabinless applications, when wind forces act on the surface of the battery module 33, the thickened and widened flange structure formed by the partition plate 3313 and the first strain plate 3314 can effectively disperse wind pressure loads and suppress panel flutter and overall bending deformation. The partition plate 3313 is firmly connected to the first strain plate 3314 by welding, riveting, or integral molding. Its quantity, spacing, and size are optimized according to wind resistance requirements to maximize structural stability without significantly increasing weight.

[0048] Reference Figure 1 , Figure 9 In one embodiment, the battery module substrate 31 is provided with a first mounting groove 34 for placing the battery module assembly 30, and the first mounting groove 34 is provided with a snap-fit ​​hole 35 for snapping the battery module assembly 30 into place.

[0049] In the above embodiments, the battery module substrate 31 has a polygonal structure, preferably a quadrilateral structure, that is, the outer contour is formed by multiple straight sides and apex corners connected alternately. A first mounting groove 34 is provided on the upper surface of the battery module substrate 31, the shape of which matches the overall polygonal contour of the battery module substrate 31, for accurately accommodating and positioning the battery module assembly 30. A snap-fit ​​hole 35 is provided at the bottom of the first mounting groove 34. The snap-fit ​​hole 35 is a square hole, and its position corresponds one-to-one with the snap-fit ​​block 3310 on the battery module assembly 30. When the battery module assembly 30 is placed into the first mounting groove 34, its snap-fit ​​block 3310 passes through the square snap-fit ​​hole 35 from bottom to top or from top to bottom, and achieves a firm snap-fit ​​through interference fit, limiting step or elastic buckle, thereby stably locking the battery module assembly 30 on the battery module substrate 31, and at the same time playing a dual limiting role in the axial and radial directions. Furthermore, on the outer contour of the battery module substrate 31, a third protrusion 36 is formed in the edge region between any two adjacent corners, where the adjacent corners of the battery module substrate 31 are right angles. The third protrusion 36 is an outwardly protruding arc structure, with its two ends tangent to the contour lines of the two adjacent corners, and the angles formed by the tangents at both ends and the contour lines of their respective adjacent corners are complementary angles. The sum of the inner angles formed by the tangents at both ends of the third protrusion 36 and the contour lines of the adjacent right angles is 180°, ensuring a smooth transition when airflow passes through. The text further explains that the shape of the third protrusion 36 is consistent with that of the second protrusions 9 in other layers of the system, and when the radius is the same as that of the first protrusion 8, the second protrusion 9 (and the third protrusion 36) has a larger arc and arc length. Multiple third protrusions 36 are distributed along the polygonal circumferential direction, together forming the flower-shaped feature of the battery module substrate 31. This feature not only strengthens the edge stiffness of the structure, but also guides the airflow to form a swirling buffer under outdoor wind load conditions, reducing direct impact force.

[0050] Reference Figure 1 , Figure 8 In one embodiment, the connecting substrate 2 is provided with a second mounting groove 4 for placing the battery module assembly 30. The second mounting groove 4 is provided with corresponding positioning holes 5 and a plurality of mounting holes 6. The connecting post 32 is inserted into the mounting holes 6 and connected to the connecting substrate 2.

[0051] In the above embodiments, the connecting substrate 2 has a polygonal structure, preferably a quadrilateral structure, that is, the outer contour is composed of multiple straight side segments and alternating apex corners. A second mounting groove 4 is provided on the upper surface or inner area of ​​the connecting substrate 2. The shape of the groove matches the shape of the battery module substrate 31 and is used to receive and position the battery module assembly 30 from above or below. The second mounting groove 4 integrates a positioning hole 5 and multiple mounting holes 6: the positioning hole 5 is a circular hole located at the center of the second mounting groove 4, used to provide an initial assembly reference; the multiple mounting holes 6 are arranged in an array around the positioning hole 5, and their shapes correspond to the cross-section of the connecting post 32, ensuring that the connecting post 32 can be smoothly inserted and form a stable fit. When stacking module substrate assemblies 3 at different angles, the position of the mounting holes 6 can be adaptively adjusted according to the required rotation angle to meet diverse stacking requirements. After the connecting post 32 passes through the battery module assembly 30 from above or below, its end is inserted into the corresponding mounting hole 6, thereby achieving a detachable connection between the connecting substrate 2 and the adjacent module substrate assembly 3. Furthermore, on the outer contour of the connecting substrate 2, a second protrusion 9 extending outward is formed in the side region between any two adjacent corners, where the adjacent corners of the connecting substrate 2 are right angles. This second protrusion 9 is an outwardly projecting arc structure: the tangent at one end forms an angle with the contour line of one side corner of the connecting substrate 2, and the tangent at the other end forms another angle with the contour line of the adjacent other side corner. The sum of these two angles is 180 degrees, meaning they are complementary angles. In other words, the sum of the inner angles formed by the tangents at both ends of the second protrusion 9 and the contour lines of the adjacent right angles is 180 degrees. This complementary tangent design allows for a smooth transition of airflow as it passes over the edge of the connecting substrate 2, reducing turbulence. Multiple second protrusions 9 are distributed circumferentially, collectively forming the flower-shaped feature of the connecting substrate 2, which not only enhances the edge structural strength but also plays an aerodynamic buffering role under outdoor wind loads.

[0052] Reference Figure 1 , Figure 7 In one embodiment, the base 1 is provided with a third mounting groove 7, and the module substrate assembly 3 is disposed in the third mounting groove 7 and connected to the base 1.

[0053] In the above embodiment, the base 1 adopts a polygonal structure, preferably a quadrilateral structure, that is, its outer contour is formed by four straight sides and four vertices connected in sequence. A third mounting groove 7 is provided in the central area of ​​the upper surface of the base 1. A fixing hole is also provided at the bottom of the third mounting groove 7. The fixing hole is used for the insertion of the connecting post 32 to fix the module substrate assembly 3. The shape of the groove matches the bottom contour of the upper module substrate assembly 3 and is used to accommodate and fix the bottom module substrate assembly 3. When the module substrate assembly 3 is placed on the base 1, its bottom is embedded in the third mounting groove 7, and the groove wall and the bottom surface achieve horizontal limiting and vertical support, thereby ensuring the accuracy of the initial assembly position and the structural stability during operation. In addition, a first protrusion 8 is provided at the junction of the side edges between any two adjacent corners on the outer contour of the base 1. The adjacent corners of the base 1 are right angles. Since the base 1 is a quadrilateral structure, each first protrusion 8 is located between two adjacent right angle sides and is in the shape of a quarter circle arc. The first protrusion 8 has a specific geometric design: its two ends are tangent to the contour lines of its two adjacent corners, and the angles formed by the tangents at both ends and the contour lines of their respective corners are the same size, both being 45°, ensuring the symmetry of the shape and the continuity of airflow transition. The four first protrusions 8 are evenly distributed around the circumference of the base 1, collectively forming the flower-shaped feature of the base 1. This feature not only enhances the local stiffness of the base 1's edges but also guides airflow near the ground to smoothly circulate along the protruding curved surface in outdoor environments, forming a bottom swirling buffer zone and effectively reducing the overturning effect of wind on the overall structure.

[0054] Reference Figures 1-3 , Figure 8 , Figure 10-18 In one embodiment, the heights of the plurality of module substrate assemblies 3 are different, and each module substrate assembly 3 is stacked at different angles via the connecting substrate 2.

[0055] In the above embodiment, the cabinless portable outdoor soft-pack battery pack assembly is composed of four modules with different heights and internal structures—Module 1, Module 2, Module 3, and Module 4—stacked sequentially from top to bottom, presenting an overall macroscopic spiral shape. Module 4 is located at the bottom and its structure includes a base 1, two battery module assemblies 30, two battery module substrates 31, and several connecting posts 32. The battery module assemblies 30 are placed in the third mounting slot 7 of the base 1, which serves to position and limit the battery module assemblies 30. A square snap-fit ​​hole 35 passes through a snap-fit ​​block 3310, and the battery module substrates 31 are placed on top of the battery module assemblies 30, stacked sequentially. The connecting posts 32 pass through through holes 3312 to secure the stacked battery module assemblies 30. Module 3 is stacked on top of Module 4, with a connecting substrate 2 at its bottom and two battery module assemblies 30, two battery module substrates 31, and several connecting posts 32 above it. The battery module assembly 30 is placed in the second mounting slot 4 of the connecting substrate 2, and the third mounting slot 7 serves to position and limit the battery module assembly 30. The square snap-fit ​​hole 35 passes through the snap-fit ​​block 3310, and the battery module substrate 31 is placed on the battery module assembly 30. They are stacked in sequence, and the connecting post 32 passes through the through hole 3312 to fix the battery module assembly 30 stacked. Module 2 is located above Module 3 and consists of one connecting substrate 2, three battery module assemblies 30, three battery module substrates 31 and several connecting posts 32. The topmost module 1 consists of one connecting substrate 2, four battery module assemblies 30, four battery module substrates 31 and several connecting posts 32. The stacking method of Module 1 and Module 2 is the same as that of Module 3.

[0056] Because the number of battery module assemblies 30 and battery module substrates 31 in each module is different, their overall height in the vertical direction varies. That is, the height of each module is different, with a height difference of 5-10 cm between adjacent modules. The length of the connecting pillars 32 used to penetrate each layer is also adjusted accordingly to match the height of each module. During stacking, each module is not stacked vertically along the same rotation angle. Instead, it is rotated around the central axis by a specific angle according to design requirements before being placed on the connecting substrate 2 of the lower module. This staggers the corners of adjacent modules. Each module substrate assembly 3 rotates around the central axis of the battery pack, meaning the mounting holes 6 on the connecting substrate 2 are rotation angle adjustment holes. The mounting holes 6 on the connecting substrate 2 of each module can be designed differently. Each module substrate assembly 3 is rotated and stacked at 20-45 degree intervals through the mounting holes 6 of the connected substrate 2. The included angle between the corresponding sides of the selected adjacent module substrate assemblies 3 is the interval angle. Each module has a polygonal structure (such as a quadrilateral). During stacking, one corner of the upper module is located precisely in the area between two adjacent corners of the lower module, forming an interlocking layout. This combination of height difference and angular deflection causes the entire battery pack assembly to rise along a spiral path from bottom to top, forming a macroscopic spiral shape. Simultaneously, the outer edge of the base 1 has a first protrusion 8, forming a flower-shaped feature. When airflow passes through this structure, it induces a swirling wind vector in the base 1 region; while in the upper spiral stacked region, the airflow is guided by the interlaced contours of the polygonal modules, forming a spiral wind vector. Furthermore, the "distribution plate 3313" in each battery module 33 gives it an I-beam configuration, significantly enhancing the structural rigidity of individual modules. Together with the flower-shaped edge and spiral shape, it effectively buffers and disperses wind force, greatly reducing the risk of swaying or instability of the hullless structure in strong outdoor wind conditions.

[0057] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A battery pack, characterized in that, It includes a base, a connecting substrate, and multiple sequentially stacked module substrate assemblies; The module substrate assembly is disposed on the base, the connecting substrate is disposed between adjacent module substrate assemblies, and adjacent module substrate assemblies are detachably connected through the connecting substrate.

2. The battery pack according to claim 1, characterized in that, The module substrate assembly includes multiple battery module assemblies and multiple battery module substrates. The battery module substrates are disposed on the battery module assemblies, and the multiple battery module assemblies and multiple battery module substrates are arranged in a staggered manner.

3. The battery pack according to claim 2, characterized in that, The module substrate assembly further includes a connecting post, which is detachably connected to the battery module assembly and is detachably connected to the connecting substrate.

4. The battery pack according to claim 3, characterized in that, The battery module assembly is composed of multiple battery module arrays. Each battery module includes a battery cell and multiple strain clamping assemblies. The battery cell is disposed between adjacent strain clamping assemblies. The battery module substrate is disposed on the strain clamping assemblies and is engaged with the strain clamping assemblies.

5. The battery pack according to claim 4, characterized in that, The strain clamping assembly includes a snap-fit ​​block and a strain clamping body connected to the snap-fit ​​block. The snap-fit ​​block snaps into the battery module substrate, the strain clamping body contacts the battery module substrate, and the battery cell is located between adjacent strain clamping bodies.

6. The battery pack according to claim 5, characterized in that, The snap-fit ​​block is provided with multiple through holes, and the connecting post is connected through the through holes.

7. The battery pack according to claim 5, characterized in that, The strain clamping body includes a first strain plate, a second strain plate, and a plurality of strain bodies. The strain bodies are connected between the first strain plate and the second strain plate. One end of the first strain plate and the second strain plate are respectively connected to the snap-fit ​​block. The ends of the first strain plate and the second strain plate away from the snap-fit ​​block are open ends.

8. The battery pack according to claim 7, characterized in that, The strain body includes a first fixed plate, a second fixed plate, and a strain buffer component. The strain buffer component is connected to the first strain plate and the second strain plate respectively, and the strain buffer component is disposed between the first fixed plate and the second fixed plate arranged opposite to each other.

9. The battery pack according to claim 8, characterized in that, The strain buffer component includes a strain base plate, multiple strain connecting plates, and multiple third strain plates. The strain base plate and the third strain plates are arranged at intervals between the first fixing plate and the second fixing plate. The strain base plate is located between adjacent third strain plates. The third strain plates are connected to the first strain plate and the second strain plate respectively through the strain connecting plates.

10. The battery pack according to claim 9, characterized in that, The third strain plate bends and protrudes toward the side away from the strain substrate, and the strain connecting plate is disposed on the bending protrusion and connected to the first strain plate and the second strain plate respectively.

11. The battery pack according to claim 7, characterized in that, The strain clamping assembly further includes a plurality of spaced-apart plates, which are disposed on the side of the first strain plate away from the strain body.

12. The battery pack according to claim 2, characterized in that, The battery module substrate is provided with a first mounting groove for placing the battery module assembly, and the first mounting groove is provided with a snap-fit ​​hole for snapping the battery module assembly into place.

13. The battery pack according to claim 3, characterized in that, The connecting base plate is provided with a second mounting groove for placing the battery module assembly. The second mounting groove is provided with corresponding positioning holes and multiple mounting holes. The connecting post is inserted into the mounting holes and connected to the connecting base plate.

14. The battery pack according to claim 1, characterized in that, The base is provided with a third mounting slot, and the module substrate assembly is disposed in the third mounting slot and connected to the base.

15. The battery pack according to claim 1, characterized in that, The base has a polygonal structure, and a first protrusion is formed between adjacent corners of the base. The tangents at both ends of the first protrusion are at the same angle as the outline of the adjacent corner.

16. The battery pack according to claim 1, characterized in that, The connecting substrate has a polygonal structure, and a second protrusion is formed between adjacent corners of the connecting substrate. The tangents at both ends of the second protrusion are complementary to the angles formed by the contour lines of the adjacent corners.

17. The battery pack according to claim 2, characterized in that, The battery module substrate has a polygonal structure, and a third protrusion is formed between adjacent corners of the battery module substrate. The tangents at both ends of the third protrusion are complementary to the angles formed by the contour lines of the adjacent corners.

18. The battery pack according to claim 1, characterized in that, The multiple module substrate assemblies have different heights, and each module substrate assembly is stacked at a different angle via the connecting substrate.

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