Multi-directional quasi-zero stiffness synchronous vibration reduction and energy collection support for power battery

Abstract

The invention relates to a multidirectional quasi-zero stiffness synchronous vibration reduction and energy collection support for a power battery. The multidirectional quasi-zero stiffness synchronous vibration reduction and energy collection support comprises a support body, a horizontal quasi-zero stiffness structure, a vertical quasi-zero stiffness structure, a three-directional vibration absorption structure installed on the power battery and an energy recovery structure connected with the three-directional vibration absorption structure. The horizontal quasi-zero stiffness structures are regularly arranged in the circumferential direction of the bracket main body and are used for damping and supporting the power battery in the horizontal direction; the vertical quasi-zero stiffness structure is used for damping and supporting the power battery along the vertical direction; the three-way vibration absorption structure is installed on the upper side of the power battery in the vertical direction and used for absorbing vibration energy of the power battery. And the energy recovery structure is used for converting the vibration energy absorbed by the three-way vibration absorption structure into electric energy and outputting the electric energy. According to the scheme, low-frequency vibration of the power battery in three directions can be restrained, and the large bearing effect can be achieved; and meanwhile, the restriction relation between vibration reduction and energy collection can be reduced, and efficient low-frequency vibration energy conversion is achieved.

Description

Technical Field

[0001] The present invention relates to the field of electromagnetic vibration control and synchronous power generation, and particularly to a multi-directional quasi-zero stiffness synchronous vibration damping and energy harvesting bracket for a power battery. Background Art

[0002] As one of the three core components of new energy vehicles, currently, lithium batteries are mainly used for power batteries. Their safety and cruising range are the two major pain points in the current industry. Although the installation positions of power batteries vary depending on the vehicle model (including the middle of the chassis, under the trunk, under the rear seat, etc.), during the driving of new energy vehicles, vibrations continuously generated by the road surface, wind resistance, motor, etc. will inevitably be transmitted to the power battery pack through the mechanical structure, causing the power battery to bear vibrations in three directions: left and right, front and back, and vertical. For lithium batteries, the squeezing, collision, etc. caused by vibrations in the three directions will bring three major hazards: First, vibrations will cause mechanical damage to the internal components of the battery, resulting in cracks or even detachment; second, vibrations will change the distance between the electrolyte and the electrode, reducing the battery life; third, the internal short circuit caused by vibrations may directly trigger thermal runaway, leading to fire and combustion. Thus, it can be seen that vibration is the core factor exacerbating the above two pain points of power batteries, and it is urgently necessary to reduce the three-direction vibrations suffered by the power battery during vehicle driving.

[0003] Currently, there are mainly two ways to damp the vibration of power batteries: one is to fill damping materials such as rubber gaskets between the power battery pack and the chassis, and the other is to add vibration isolation brackets between the power battery pack and the chassis. The above vibration damping methods have played an effective role in protecting the structural integrity of the battery pack, maintaining the stability of battery performance, and extending the battery life, but there are still the following serious deficiencies: 1) The vibration damping frequency band is often fixed and effective for high-frequency vibrations, while the vibration damping effect in the low-frequency range (below 10 Hz) is poor; 2) The vibration damping mechanism is to convert the vibration energy into heat and dissipate it, which not only increases the threat of thermal runaway of the power battery but also causes obvious energy waste. If the vibration energy suffered by the power battery can be collected and converted into electrical energy, it can not only suppress the vibration suffered by the power battery but also charge the power battery to improve the cruising range. Therefore, there is an urgent application demand for synchronous vibration damping and energy harvesting of power batteries.

[0004] The synchronous vibration damping and energy harvesting of power batteries mainly face the following problems: 1) The power battery is subjected to vibrations in three directions: left and right, front and back, and vertical, and existing structures often only target single-direction vibrations; 2) Most existing vibration damping structures are based on linear vibration mechanisms and are difficult to suppress low-frequency vibrations; 3) The power battery pack itself is relatively heavy and the installation space is compact, and the load-bearing capacity of existing vibration damping structures is limited; 4) In existing structures, vibration damping and energy harvesting restrict each other, resulting in low efficiency of vibration energy harvesting. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a multi-directional quasi-zero stiffness synchronous vibration damping and energy harvesting bracket for a power battery.

[0006] To achieve the above object of the invention, the present invention provides a multi-directional quasi-zero stiffness synchronous vibration damping and energy harvesting bracket for a power battery, comprising: a bracket main body, a horizontal quasi-zero stiffness structure and a vertical quasi-zero stiffness structure provided on the bracket main body for connecting the power battery, a three-directional vibration damping structure for mounting on the power battery, and an energy recovery structure connected to the three-directional vibration damping structure; The horizontal quasi-zero stiffness structures are regularly arranged along the circumferential direction of the bracket main body for vibration damping support of the power battery in the horizontal direction; The vertical quasi-zero stiffness structure vibration damping supports the power battery in the vertical direction; The three-directional vibration damping structure is mounted on the upper side of the power battery in the vertical direction for absorbing the vibration energy of the power battery; The energy recovery structure is used to convert the vibration energy absorbed by the three-directional vibration damping structure into electric energy and output it.

[0007] According to one aspect of the present invention, the horizontal quasi-zero stiffness structure comprises: four groups of horizontal quasi-zero stiffness modules; The static stiffness of each group of the horizontal quasi-zero stiffness modules in the horizontal direction is 0; Along the circumferential direction of the bracket main body, the four groups of the horizontal quasi-zero stiffness modules are regularly arranged at intervals; The horizontal quasi-zero stiffness module comprises: a first horizontal magnet assembly, a second horizontal magnet assembly, an upper spring and a lower spring; The first horizontal magnet assembly and the second horizontal magnet assembly are arranged at intervals; wherein, the first horizontal magnet assembly is used for connecting with the side wall of the power battery, and the second horizontal magnet assembly is connected with the side wall of the bracket main body; The first horizontal magnet assembly and the second horizontal magnet assembly are respectively rectangular Halbach arrays; The opposite ends of the upper spring are respectively connected with the upper side of the edge of the power battery and the upper side of the bracket main body; The opposite ends of the lower spring are respectively connected with the lower side of the edge of the power battery and the lower side of the bracket main body; Along the horizontal direction, the magnetic force between the first horizontal magnet assembly and the second horizontal magnet assembly is a repulsive force.

[0008] According to one aspect of the present invention, the vertical quasi-zero stiffness structure comprises: a vertical quasi-zero stiffness module; The static stiffness of the vertical quasi-zero stiffness module in the vertical direction is 0; The vertical quasi-zero stiffness module includes: a first annular Halbach magnet assembly, a second annular Halbach magnet assembly, and a first linear spring; The first annular Halbach magnet assembly is connected to the power battery; The second annular Halbach magnet assembly is connected to the bottom surface of the bracket main body; The upper and lower ends of the first linear spring are respectively connected to the lower side of the power battery and the bottom surface of the bracket main body; The first annular Halbach magnet assembly and the second annular Halbach magnet assembly are coaxially arranged.

[0009] According to one aspect of the present invention, the first annular Halbach magnet assembly includes: a plurality of first magnetic rings; The plurality of first magnetic rings are coaxially arranged in the same plane, and there is a gap between adjacent first magnetic rings; The second annular Halbach magnet assembly includes: a plurality of second magnetic rings; The plurality of second magnetic rings are coaxially arranged in the same plane, and there is a gap between adjacent second magnetic rings.

[0010] According to one aspect of the present invention, the first magnetic ring and the second magnetic ring are arranged in a staggered manner; The gap between adjacent first magnetic rings is greater than the radial width of the second magnetic ring; The gap between adjacent second magnetic rings is greater than the radial width of the first magnetic ring.

[0011] According to one aspect of the present invention, the first magnetic ring has at least one first ring body; If the first magnetic ring has a plurality of the first ring bodies, the plurality of first ring bodies are coaxially connected in a nested manner; The second magnetic ring has at least one second ring body; If the second magnetic ring has a plurality of the second ring bodies, the plurality of second ring bodies are coaxially connected in a nested manner.

[0012] According to one aspect of the present invention, the upper end of the first linear spring is nested with the inner side / outer side of the first magnetic ring, and the upper end surface of the first linear spring is fixedly connected to the lower side of the power battery. The lower end of the first linear spring is nested with the outer side / inner side of the second magnetic ring, and the lower end surface of the first linear spring is fixedly connected to the bottom surface of the bracket main body.

[0013] According to one aspect of the present invention, the first horizontal magnet assembly includes: an odd number of first rectangular magnets, and the plurality of first rectangular magnets are arranged in sequence along the side wall of the power battery; In the first horizontal magnet assembly, the magnetization directions between adjacent first rectangular magnets are opposite, and the magnetization direction of the first rectangular magnet at the middle position is set in the direction towards the second horizontal magnet assembly; The second horizontal magnet assembly includes: an odd number of second rectangular magnets, and the plurality of second rectangular magnets are arranged in sequence along the side wall of the bracket body; In the second horizontal magnet assembly, the magnetization directions between adjacent second rectangular magnets are opposite, and the magnetization direction of the second rectangular magnet at the middle position is set in the direction towards the first horizontal magnet assembly; An odd number of the first magnetic rings are provided in the first annular Halbach magnet assembly, an odd number of the second magnetic rings are provided in the second annular Halbach magnet assembly, and the number of the first magnetic rings is the same as that of the second magnetic rings; The first magnetic ring is a three-layer stacked structure; Along the radial direction of the first annular Halbach magnet assembly, the innermost first magnetic ring has a first ring body. Among them, the magnetization directions of each layer in the first ring body change counterclockwise by 90° from top to bottom, and the magnetization direction of the middle layer is radially inward; Along the radial direction of the first annular Halbach magnet assembly, the first magnetic rings at the remaining positions have two first ring bodies. Among them, the magnetization directions of each layer in the first ring body on the inner side of the first magnetic ring change clockwise by 90° from top to bottom, and the magnetization direction of the middle layer is radially outward. The magnetization directions of each layer in the first ring body on the outer side of the first magnetic ring change counterclockwise by 90° from top to bottom, and the magnetization direction of the middle layer is radially inward; The second magnetic ring is a five-layer stacked structure; Along the radial direction of the second annular Halbach magnet assembly, the outermost second magnetic ring has a second ring body. Among them, the magnetization directions of each layer in the second ring body change clockwise by 90° from top to bottom, and the magnetization direction of the middle layer is radially outward; Along the radial direction of the second annular Halbach magnet assembly, the second magnetic rings at the remaining positions have two second ring bodies. Among them, the magnetization directions of each layer in the second ring body on the inner side of the second magnetic ring change clockwise by 90° from top to bottom, and the magnetization direction of the middle layer is radially outward. The magnetization directions of each layer in the second ring body on the outer side of the second magnetic ring change counterclockwise by 90° from top to bottom, and the magnetization direction of the middle layer is radially inward.

[0014] According to one aspect of the present invention, the three-way vibration absorption structure is a spatially orthogonally symmetric layout, which includes: a vibration absorption structure housing, an oscillator provided in the vibration absorption structure housing, and a third linear spring for connecting the vibration absorption structure housing and the oscillator; The vibration absorption structure housing is a hollow housing with a regular structure; In the vertical direction, third magnetic rings are connected to the inner walls at the upper and lower ends of the vibration absorption structure housing; The third magnetic ring has at least one third ring body. Among them, if there are multiple third ring bodies, the multiple third ring bodies are stacked coaxially; In the vertical direction, a hollow annular connecting member is arranged at the middle position of the inner side wall of the vibration absorption structure housing; A fourth magnetic ring is arranged inside the annular connecting member; The oscillator has a regular structure, which includes: a hollow oscillator housing, a fifth magnetic ring and a sixth magnetic ring arranged coaxially inside the oscillator housing; In the vertical direction, the fifth magnetic ring is symmetrically arranged on opposite sides of the sixth magnetic ring; The fifth magnetic ring has at least one fifth ring body. Among them, if there are multiple fifth ring bodies, the multiple fifth ring bodies are stacked coaxially; The axial thickness of the sixth magnetic ring is the same as that of the fourth magnetic ring; In the radial direction of the oscillator housing, one end of the third linear spring is connected to the oscillator housing, and the other end of the third linear spring is connected to the annular connecting member; In the circumferential direction of the oscillator housing, four third linear springs are arranged at equal angular intervals; In the vertical direction, the third linear spring, the third magnetic ring, and the fifth magnetic ring form a cubic nonlinear stiffness; In the horizontal direction, the third linear spring, the fourth magnetic ring, and the sixth magnetic ring form a quasi-zero stiffness.

[0015] According to one aspect of the present invention, the energy recovery structure includes: a coil and a power conversion interface circuit connected to the coil; The coil is wound around the vibration absorption structure housing; The power conversion interface circuit is installed on the bracket main body; The power conversion interface circuit uses a bridge rectifier circuit.

[0016] According to one solution of the present invention, the multi-directional quasi-zero stiffness synchronous vibration damping and energy collection bracket of the power battery of this solution can fully achieve the vibration damping effect in the front-back, left-right, and vertical directions. It can not only handle low-frequency vibrations, but also has a large load-bearing capacity in different directions. In addition, this solution can also efficiently convert the vibration energy received by the power battery into electrical energy, greatly reducing the restrictive relationship between vibration damping and energy collection.

[0017] According to a solution of the present invention, this solution adopts two groups of horizontal quasi-zero stiffness modules (a combination structure of linear spring + magnetic spring) in the horizontal direction and arranges them orthogonally symmetrically. It generates negative stiffness based on the first horizontal magnet assembly and the second horizontal magnet assembly, while the upper spring and the lower spring can generate positive stiffness, so that the quasi-zero stiffness effect is fully realized in the horizontal direction; in the vertical direction, the first annular Halbach magnet assembly, the second annular Halbach magnet assembly and the first linear spring combination are used to realize the effect of spiral spring + coaxial nested Halbach magnetic spring, fully realizing the quasi-zero stiffness effect in the vertical direction.

[0018] According to one solution of the present invention, the vibrator in the three-way vibration absorption structure of this solution integrates a ring-shaped Halbach array to enhance the internal magnetic field strength, thereby conveniently and efficiently converting vibration energy into electrical energy.

[0019] According to one solution of the present invention, this solution can fully utilize the cubic nonlinear stiffness formed by the magnetic force and spring force in the vertical direction to achieve strong nonlinearity in different directions. The linear terms are eliminated through the optimization and matching design of structural parameters, so that the vibration of the power battery is transmitted to the Halbach array in the three-dimensional vibration absorption structure as much as possible, thereby enhancing the relative movement between the Halbach array and the coil. Finally, the interface circuit is used to convert as much collected energy as possible into electrical energy for storage.

[0020] According to a solution of the present invention, the horizontal quasi-zero stiffness structure and the vertical quasi-zero stiffness structure of this solution constitute a three-directional quasi-zero stiffness unit with a spatially orthogonal symmetrical layout, and combined with a three-directional vibration absorption structure with a spatially orthogonal symmetrical layout, the vibration coupling in the x, y and z directions is fully reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a structural diagram of a multi-directional quasi-zero stiffness synchronous vibration reduction and energy collection bracket for a power battery according to one embodiment of the present invention; Figure 2 This is a cross-sectional view of a multi-directional quasi-zero stiffness synchronous vibration reduction and energy collection bracket for a power battery according to one embodiment of the present invention; Figure 3 FIG1 is a magnetization direction arrangement diagram of a first horizontal magnet assembly and a second horizontal magnet assembly according to an embodiment of the present invention; Figure 4 This is a structural diagram of a vertical quasi-zero stiffness module according to an embodiment of the present invention; Figure 5 FIG1 is a magnetization direction arrangement diagram of a first annular Halbach magnet assembly and a second annular Halbach magnet assembly according to an embodiment of the present invention; Figure 6Cross-sectional view of a three-way vibration absorption structure according to an embodiment of the present invention; Figure 7 Arrangement diagram of magnetization directions in a three-way vibration absorption structure according to an embodiment of the present invention.

[0022] In the figure, 1 - bracket body, 2 - horizontal quasi-zero stiffness structure, 3 - vertical quasi-zero stiffness structure, 4 - three-way vibration absorption structure, 5 - energy recovery structure, 21 - horizontal quasi-zero stiffness module, 211 - first horizontal magnet assembly, 212 - second horizontal magnet assembly, 213 - upper spring, 214 - lower spring, 31 - vertical quasi-zero stiffness module, 311 - first annular Halbach magnet assembly, 312 - second annular Halbach magnet assembly, 313 - first linear spring, 311a - first magnetic ring, 312a - second magnetic ring, 311a1 - first ring body, 312a1 - second ring body, 41 - vibration absorption structure housing, 42 - oscillator, 43 - third linear spring, 411 - third magnetic ring, 411a - third ring body, 412 - annular connector, 412a - fourth magnetic ring, 421 - oscillator housing, 422 - fifth magnetic ring, 423 - sixth magnetic ring, 422a - fifth ring body, 51 - coil, 52 - electric energy conversion interface circuit. Specific embodiments

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0024] When describing the embodiments of the present invention, the orientation or positional relationships expressed by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" are based on the orientation or positional relationships shown in the relevant drawings. This is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting the present invention.

[0025] The present invention will be described in detail below with reference to the drawings and specific embodiments. The embodiments cannot be elaborated one by one here, but the embodiments of the present invention are not limited to the following embodiments.

[0026] As Figure 1As shown, according to an embodiment of the present invention, a multi-directional quasi-zero stiffness synchronous vibration damping and energy harvesting bracket for a power battery of the present invention includes: a bracket main body 1, a horizontal quasi-zero stiffness structure 2 and a vertical quasi-zero stiffness structure 3 disposed on the bracket main body 1 for connecting the power battery, a three-directional vibration damping structure 4 for mounting on the power battery, and an energy recovery structure 5 connected to the three-directional vibration damping structure 4; in this embodiment, the bracket main body 1 can be set as a frame structure or a hollow shell structure. For the power battery, the bracket main body 1 is preferably a hollow shell structure to achieve the encapsulation of the power battery, thereby achieving the vibration damping effect of the power battery inside the bracket main body 1.

[0027] In this embodiment, the horizontal quasi-zero stiffness structures 2 are regularly arranged along the circumference of the bracket main body 1 for vibration damping support of the power battery in the horizontal direction; the vertical quasi-zero stiffness structures 3 provide vibration damping support for the power battery in the vertical direction; the three-directional vibration damping structure 4 is installed on the upper side of the power battery in the vertical direction for absorbing the vibration energy of the power battery.

[0028] In this embodiment, the energy recovery structure 5 is used to convert the vibration energy absorbed by the three-directional vibration damping structure 4 into electrical energy and output it.

[0029] Through the above settings, in this solution, by arranging the horizontal quasi-zero stiffness structure 2 and the vertical quasi-zero stiffness structure 3 around the power battery, the vibration of the power battery in three directions is effectively suppressed, which can not only handle low-frequency vibration but also achieve large load-bearing capacity; in addition, by further arranging the three-directional vibration damping structure 4 and installing it on the power battery, the three-directional vibration damping structure 4 can adaptively absorb vibration with the power battery to further fully suppress the part that is not completely eliminated by the horizontal quasi-zero stiffness structure 2 and the vertical quasi-zero stiffness structure 3, thereby fully improving the ability of this solution to suppress vibration in a wide frequency band range.

[0030] In addition, by setting the energy recovery structure 5 and installing the energy recovery structure 5 on the three-directional vibration damping structure 4, in this way, during the process of the three-directional vibration damping structure 4 adaptively absorbing vibration with the power battery, the absorbed vibration energy can be further converted into electrical energy in the energy recovery structure 5, so that the vibration energy is efficiently converted, greatly reducing the restrictive relationship between vibration damping and energy harvesting.

[0031] Combined Figure 1 and Figure 2As shown, according to an embodiment of the present invention, the horizontal quasi-zero stiffness structure 2 includes: four groups of horizontal quasi-zero stiffness modules 21; wherein, along the circumferential direction of the bracket main body 1, the four groups of horizontal quasi-zero stiffness modules 21 are regularly arranged at intervals; specifically, the power battery can be set as a rectangular body. Thus, along the length direction of the power battery, two groups of horizontal quasi-zero stiffness modules 21 are symmetrically arranged, and along the width direction of the power battery, two groups of horizontal quasi-zero stiffness modules 21 are symmetrically arranged. Furthermore, the regular arrangement of the horizontal quasi-zero stiffness modules 21 can be realized, thereby realizing the stable and reliable support for the power battery.

[0032] In this embodiment, the static stiffness of each group of horizontal quasi-zero stiffness modules 21 in the horizontal direction is 0; thus, the horizontal quasi-zero stiffness module 21 includes: a first horizontal magnet assembly 211, a second horizontal magnet assembly 212, an upper spring 213, and a lower spring 214; wherein, the first horizontal magnet assembly 211 and the second horizontal magnet assembly 212 are parallel, and the first horizontal magnet assembly 211 and the second horizontal magnet assembly 212 are arranged at intervals; thus, the first horizontal magnet assembly 211 is used to be connected to the side wall of the power battery, and the second horizontal magnet assembly 212 is connected to the side wall of the bracket main body 1. In this embodiment, the first horizontal magnet assembly 211 and the second horizontal magnet assembly 212 are respectively block-shaped Halbach arrays.

[0033] In this embodiment, the magnetic force between the first horizontal magnet assembly 211 and the second horizontal magnet assembly 212 in the horizontal direction shows a repulsive force, thus fully avoiding the collision between the power battery and the bracket main body 1, which is more beneficial to ensuring the safety and reliability of the power battery.

[0034] In this embodiment, the upper spring 213 is a compression spring, and its opposite ends are respectively connected to the upper edge of the power battery and the upper side of the bracket main body 1; further, to ensure the accurate and reliable installation, the upper spring 213 is connected to the middle position of the upper edge of the power battery. Thus, the four upper springs 213 on the upper side of the power battery can present a symmetric distribution effect, so that the supporting force for the power battery is more balanced. Matching the installation method of the upper spring 213, the opposite ends of the lower spring 214 are respectively connected to the lower edge of the power battery and the lower side of the bracket main body 1; wherein, to ensure the accurate and reliable installation, the lower spring 214 is connected to the middle position of the lower edge of the power battery. Thus, the four lower springs 214 on the lower side of the power battery can present a symmetric distribution effect, so that the supporting force for the power battery is more balanced.

[0035] In this embodiment, the upper spring 213 and the lower spring 214 are coaxially arranged and are disposed near the edge of the power battery. Thus, based on the interaction between the upper spring 213 and the lower spring 214, not only can the balanced support of the power battery be effectively ensured, but also the vibration and tilt of the power battery can be effectively suppressed. In particular, it is more beneficial to eliminate the collision between the edge of the power battery and the side wall of the bracket body 1.

[0036] As Figure 3 shown, according to an embodiment of the present invention, in a stationary state and along the vertical direction, the vertical center positions of the first horizontal magnet assembly 211 and the second horizontal magnet assembly 212 coincide with the vertical center plane of the power battery. Thus, the support balance performance of this solution can be fully ensured. In this embodiment, the height of the second horizontal magnet assembly 212 in the vertical direction is the same as the thickness of the power battery in the vertical direction, while the height of the first horizontal magnet assembly 211 in the vertical direction is less than the height of the second horizontal magnet assembly 212 in the vertical direction. Thus, the operating range of the power battery can be fully covered in the vertical direction, and further, the power battery can have sufficient support in the vertical direction, which is more beneficial to ensuring the support reliability of the present invention.

[0037] In this embodiment, the first horizontal magnet assembly 211 includes: an odd number of first rectangular magnets, and a plurality of first rectangular magnets are arranged in sequence along the side wall of the power battery; for example, five first rectangular magnets are provided. Thus, they can be arranged in sequence along the extension direction of the side wall of the power battery to ensure the compactness of the overall structure of the first horizontal magnet assembly 211. Of course, in other setting manners, the first rectangular magnets can also be set to other numbers, which are determined according to the parameters of the power battery to which they are connected. Further, in the first horizontal magnet assembly 211, the magnetization directions between adjacent first rectangular magnets are opposite, and the magnetization direction of the first rectangular magnet in the middle position is set along the direction towards the second horizontal magnet assembly 212; In this embodiment, the second horizontal magnet assembly 212 includes: an odd number of second rectangular magnets, and a plurality of second rectangular magnets are arranged in sequence along the side wall of the bracket body 1; for example, five second rectangular magnets are provided. Thus, they can be arranged in sequence along the extension direction of the side wall of the bracket body 1 to ensure the compactness of the overall structure of the second horizontal magnet assembly 212. Of course, in other setting manners, the second rectangular magnets can also be set to other numbers, which are determined according to the parameters of the power battery to which they are connected. Further, in the second horizontal magnet assembly 212, the magnetization directions between adjacent second rectangular magnets are opposite, and the magnetization direction of the second rectangular magnet in the middle position is set along the direction towards the first horizontal magnet assembly 211.

[0038] With the above settings, the magnetization directions in the first horizontal magnet assembly 211 and the second horizontal magnet assembly 212 are symmetrically arranged. Thus, while ensuring the repulsive force between the first horizontal magnet assembly 211 and the second horizontal magnet assembly 212, the centering limitation of the first horizontal magnet assembly 211 and the second horizontal magnet assembly 212 in the horizontal direction can be effectively ensured, so as to effectively ensure the support stability of the horizontal quasi-zero stiffness module 21.

[0039] Combined with Figure 1 、 Figure 2 and Figure 4 As shown, according to an embodiment of the present invention, the vertical quasi-zero stiffness structure 3 includes: a vertical quasi-zero stiffness module 31; wherein, the static stiffness of the vertical quasi-zero stiffness module 31 in the vertical direction is 0. In this embodiment, the vertical quasi-zero stiffness module 31 includes: a first annular Halbach magnet assembly 311, a second annular Halbach magnet assembly 312, and a first linear spring 313; in this embodiment, the first annular Halbach magnet assembly 311 is connected to the power battery; the second annular Halbach magnet assembly 312 is connected to the bottom surface of the bracket main body 1; the upper and lower ends of the first linear spring 313 are respectively connected to the first annular Halbach magnet assembly 311 and the second annular Halbach magnet assembly 312. In this embodiment, the first annular Halbach magnet assembly 311 and the second annular Halbach magnet assembly 312 are coaxially arranged.

[0040] In this embodiment, to ensure the reliability of the connection, the upper and lower ends of the first linear spring 313 can also be respectively connected to the lower side of the power battery and the bottom surface of the bracket main body 1. In this embodiment, the vertical quasi-zero stiffness module 31 is the main support for the power battery in this solution, and among them, especially the stiffness of the first linear spring 313 needs to meet the requirement of effectively supporting the weight of the power battery.

[0041] Combined with Figure 1 、 Figure 2 and Figure 4 As shown, according to an embodiment of the present invention, the first annular Halbach magnet assembly 311 includes: a plurality of first magnetic rings 311a; wherein, the plurality of first magnetic rings 311a are coaxially arranged in the same plane, and there is an interval between adjacent first magnetic rings 311a; further, the second annular Halbach magnet assembly 312 includes: a plurality of second magnetic rings 312a; wherein, the plurality of second magnetic rings 312a are coaxially arranged in the same plane, and there is an interval between adjacent second magnetic rings 312a.

[0042] Combined with Figure 1 、 Figure 2 and Figure 4As shown, according to an embodiment of the present invention, the first magnetic ring 311a and the second magnetic ring 312a are arranged in a staggered manner; wherein, the interval between adjacent first magnetic rings 311a is greater than the radial width of the second magnetic ring 312a; the interval between adjacent second magnetic rings 312a is greater than the radial width of the first magnetic ring 311a.

[0043] Through the above settings, the coplanar coincidence of the first annular Halbach magnet assembly 311 and the second annular Halbach magnet assembly 312 can be realized during the vibration damping process, so that the vertical quasi-zero stiffness module 31 of this solution has sufficient vibration stroke, effectively ensuring the supporting ability of this solution in the vertical direction while fully saving the internal installation space, making the overall structure more compact.

[0044] Combined with Figure 1 、 Figure 2 and Figure 4 As shown, according to an embodiment of the present invention, the first magnetic ring 311a has at least one first ring body 311a1; wherein, if the first magnetic ring 311a has a plurality of first ring bodies 311a1, the plurality of first ring bodies 311a1 are coaxially connected in a nested manner; in this embodiment, the plurality of first ring bodies 311a1 are fixedly connected to each other. Further, the second magnetic ring 312a has at least one second ring body 312a1; wherein, if the second magnetic ring 312a has a plurality of second ring bodies 312a1, the plurality of second ring bodies 312a1 are coaxially connected in a nested manner; in this embodiment, the plurality of second ring bodies 312a1 are fixedly connected to each other.

[0045] Through the above settings, the structure of the first magnetic ring 311a and the second magnetic ring 312a is optimized in this solution, so that this solution can fully meet the supporting performance in the vertical direction, enabling it to match with the first linear spring 313 to fully achieve quasi-zero stiffness in the vertical direction. Among them, based on the first annular Halbach magnet assembly 311 and the second annular Halbach magnet assembly 312 to form negative stiffness, and the first linear spring 313 to form positive stiffness. Furthermore, through the combined adjustment of the first annular Halbach magnet assembly 311, the second annular Halbach magnet assembly 312 and the first linear spring 313, the precise adjustment of quasi-zero stiffness can be realized more flexibly.

[0046] Combined with Figure 1 、 Figure 2 and Figure 4As shown, according to an embodiment of the present invention, the upper end of the first linear spring 313 is nested with the inner / outer side of the first magnetic ring 311a of the first magnetic ring assembly 311, and the upper end surface of the first linear spring 313 is fixedly connected to the lower side of the power battery. The lower end of the first linear spring 313 is nested with the outer / inner side of the second magnetic ring 312a of the second magnetic ring assembly 312, and the lower end surface of the first linear spring 313 is fixedly connected to the bottom surface of the bracket main body 1. In this embodiment, the upper end of the first linear spring 313 is nested with the outer side of the first magnetic ring 311a at the middle position of the first annular Halbach magnet assembly 311, and the lower end of the first linear spring 313 is nested with the inner side of the second magnetic ring 312a at the middle position of the second annular Halbach magnet assembly 312.

[0047] Through the above settings, the gap between the first magnetic ring 311a and the second magnetic ring 312a is fully utilized, making the installation of the first linear spring 313 more flexible. In particular, for the first magnetic ring 311a and the second magnetic ring 312a of different sizes, the first linear spring 313 of the corresponding size can be installed in the same way. Thus, the installation selection (such as size, elasticity, number of settings, etc.) of the first linear spring 313 in this solution is more flexible, effectively ensuring the overall support of the vertical quasi-zero stiffness module 31. In addition, the accurate positioning of the installation position of the first linear spring 313 can be accurately realized, so that it has a reliable and stable support ability.

[0048] Combined Figure 1 、 Figure 2 、 Figure 4 and Figure 5 As shown, according to an embodiment of the present invention, an odd number of first magnetic rings 311a are provided in the first annular Halbach magnet assembly 311, an odd number of second magnetic rings 312a are provided in the second annular Halbach magnet assembly 312, and the number of the first magnetic rings 311a and the second magnetic rings 312a is the same; for example, three first magnetic rings 311a are provided in the first annular Halbach magnet assembly 311, and three second magnetic rings 312a are provided in the second annular Halbach magnet assembly 312.

[0049] Further, to achieve a quasi-zero stiffness support in the vertical direction, further optimization design is carried out for the first magnetic ring 311a. Among them, along the vertical direction (i.e., the axial direction of the first annular Halbach magnet assembly 311), the first magnetic ring 311a is arranged in a three-layer stacked structure, that is, in the vertical direction, the first magnetic ring 311a is stacked by three magnetic ring structures, and to ensure the reliability of the stack, the magnetic ring structures between adjacent two layers are fixed (such as bonding, etc.). Further, along the radial direction of the first annular Halbach magnet assembly 311, the innermost first magnetic ring 311a has a first ring body 311a1. Among them, the magnetization directions of each layer in the first ring body 311a1 change counterclockwise by 90° from top to bottom, and the magnetization direction of the middle layer is radially inward.

[0050] In this embodiment, along the radial direction of the first annular Halbach magnet assembly 311, the first magnetic ring 311a at the remaining positions (i.e., except the innermost position) has two first ring bodies 311a1. Among them, the magnetization directions of each layer in the first ring body 311a1 inside the first magnetic ring 311a change clockwise by 90° from top to bottom, and the magnetization direction of the middle layer is radially outward. The magnetization directions of each layer in the first ring body 311a1 outside the first magnetic ring 311a change counterclockwise by 90° from top to bottom, and the magnetization direction of the middle layer is radially inward.

[0051] In this embodiment, in the first annular Halbach magnet assembly 311, the magnetization directions in the first magnetic ring 311a at non-central positions are the same, so as to fully ensure the support reliability of this solution.

[0052] Further, to achieve a quasi-zero stiffness support in the vertical direction, further optimization design is carried out for the second magnetic ring 312a. Among them, along the vertical direction (i.e., the axial direction of the second annular Halbach magnet assembly 312), the second magnetic ring 312a is arranged in a five-layer stacked structure; that is, in the vertical direction, the second magnetic ring 312a is stacked by five magnetic ring structures, and to ensure the reliability of the stack, the magnetic ring structures between adjacent two layers are fixed (such as bonding, etc.). Further, along the radial direction of the second annular Halbach magnet assembly 312, the outermost second magnetic ring 312a has a second ring body 312a1. Among them, the magnetization directions of each layer in the second ring body 312a1 change clockwise by 90° from top to bottom, and the magnetization direction of the middle layer is radially outward.

[0053] In this embodiment, along the radial direction of the second annular Halbach magnet assembly 312, the second magnetic ring 312a at the remaining positions (non-outermost positions) has two second ring bodies 312a1. Among them, in the second ring body 312a1 inside the second magnetic ring 312a, the magnetization directions of each layer change clockwise by 90° from top to bottom, and the magnetization direction of the middle layer is radially outward. In the second ring body 312a1 outside the second magnetic ring 312a, the magnetization directions of each layer change counterclockwise by 90° from top to bottom, and the magnetization direction of the middle layer is radially inward.

[0054] In this embodiment, in the first annular Halbach magnet assembly 311, the magnetization directions in the first magnetic ring 311a at non-central positions are consistent to fully ensure the support reliability of this solution.

[0055] Through the above settings, this solution can make the negative stiffness design of the magnet assembly more easily match the positive stiffness of the first linear spring 313 by arranging the first annular Halbach magnet assembly 311 and the second annular Halbach magnet assembly 312 in the above-described manner. As a result, the vertical quasi-zero stiffness module 31 of this solution has better support performance. In addition, based on the magnetic repulsive force between the first annular Halbach magnet assembly 311 and the second annular Halbach magnet assembly 312, collisions can be more effectively avoided, making the use performance of this solution more beneficial.

[0056] Combined Figure 1 and Figure 6 As shown in, according to an embodiment of the present invention, the three-way vibration absorption structure 4 is arranged in a spatially orthogonal symmetric layout, and it includes: a vibration absorption structure housing 41, an oscillator 42 arranged inside the vibration absorption structure housing 41, and a third linear spring 43 for connecting the vibration absorption structure housing 41 and the oscillator 42; in this embodiment, the vibration absorption structure housing 41 is a hollow housing with a regular structure.

[0057] In this embodiment, along the vertical direction, third magnetic rings 411 are connected to the inner walls at the upper and lower ends of the vibration absorption structure housing 41; the third magnetic ring 411 has at least one third ring body 411a. Among them, if there are multiple third ring bodies 411a, the multiple third ring bodies 411a are coaxially stacked; see Figure 7 , in this embodiment, the magnetization direction of the third ring body 411a is arranged towards the oscillator 42 along the vertical direction; specifically, the magnetization direction of the third ring body 411a in the third magnetic ring 411 arranged at the upper end of the vibration absorption structure housing 41 is arranged vertically downward, while the magnetization direction of the third ring body 411a in the third magnetic ring 411 arranged at the lower end of the vibration absorption structure housing 41 is arranged vertically upward.

[0058] Further, in the vertical direction, a hollow annular connecting member 412 is provided at the middle position of the inner side wall of the vibration damping structure housing 41; and a fourth magnetic ring 412a is provided within the annular connecting member 412; wherein, referring to Figure 7 , the fourth magnetic ring 412a is arranged by stacking three magnetic rings, and in the direction from top to bottom, the magnetization directions of the magnetic rings of each layer of the fourth magnetic ring 412a change clockwise by 90°. Specifically, the magnetization direction of the uppermost magnetic ring in the fourth magnetic ring 412a is arranged in the radially outward direction, the magnetization direction of the middle layer magnetic ring is arranged in the vertically downward direction, and the magnetization direction of the lowermost magnetic ring is arranged in the radially inward direction.

[0059] In this embodiment, the oscillator 42 has a regular structure, which includes: a hollow oscillator housing 421, and a fifth magnetic ring 422 and a sixth magnetic ring 423 coaxially arranged within the oscillator housing 421; wherein, in the vertical direction, the fifth magnetic ring 422 is symmetrically arranged on opposite sides of the sixth magnetic ring 423; the fifth magnetic ring 422 has at least one fifth ring body 422a, and if there are multiple fifth ring bodies 422a, the multiple fifth ring bodies 422a are stacked coaxially; referring to Figure 7 , in this embodiment, the magnetization direction of the fifth magnetic ring 422 is arranged in the vertical direction towards the third magnetic ring 411; specifically, the magnetization direction of the fifth ring body 422a in the fifth magnetic ring 422 provided at the upper end of the oscillator 42 is vertically upward, and the magnetization direction of the fifth ring body 422a in the fifth magnetic ring 422 provided at the lower end of the oscillator 42 is vertically downward.

[0060] In this embodiment, the axial thickness of the sixth magnetic ring 423 is the same as that of the fourth magnetic ring 412a; wherein, referring to Figure 7 , the sixth magnetic ring 423 is arranged by stacking three magnetic rings, and in the direction from top to bottom, the magnetization directions of the magnetic rings of each layer of the sixth magnetic ring 423 change counterclockwise by 90°. Specifically, the magnetization direction of the uppermost magnetic ring in the sixth magnetic ring 423 is arranged in the radially inward direction, the magnetization direction of the middle layer magnetic ring is arranged in the vertically downward direction, and the magnetization direction of the lowermost magnetic ring is arranged in the radially outward direction.

[0061] In this embodiment, along the radial direction of the oscillator housing 421, one end of the third linear spring 43 is connected to the oscillator housing 421, and the other end of the third linear spring 43 is connected to the annular connecting member 412; along the circumferential direction of the oscillator housing 421, four third linear springs 43 are arranged at equal angular intervals.

[0062] In this embodiment, along the vertical direction, the third linear spring 43, the third magnetic ring 411, and the fifth magnetic ring 422 form a cubic nonlinear stiffness; along the horizontal direction, the third linear spring 43, the fourth magnetic ring 412a, and the sixth magnetic ring 423 form a quasi-zero stiffness.

[0063] With the above settings, the three-way vibration absorption structure 4 of this solution adopts a spatially orthogonal symmetric layout, which realizes full induction in different directions, so that the vibration of the power battery can be fully absorbed, effectively improving the vibration absorption capacity of this solution.

[0064] Combined Figure 1 and Figure 6 As shown, according to an embodiment of the present invention, the energy recovery structure 5 includes: a coil 51 and a power conversion interface circuit 52 connected to the coil 51; wherein, the coil 51 is wound around the vibration absorption structure housing 41; the power conversion interface circuit 52 is installed on the bracket body 1. In this embodiment, the lead of the coil 51 passes through the bracket body 1 to be connected to the power conversion interface circuit 52. In this embodiment, the power conversion interface circuit 52 adopts a bridge rectifier circuit.

[0065] With the above settings, the multi-directional quasi-zero stiffness synchronous vibration damping and energy collection bracket of the power battery in this solution can fully achieve the vibration damping effect in the front-back, left-right, and vertical directions. It can handle low-frequency vibrations and has a large load-bearing capacity in different directions. In addition, this solution can also efficiently convert the vibration energy received by the power battery into electric energy, greatly reducing the restrictive relationship between vibration damping and energy collection.

[0066] With the above settings, this solution adopts two sets of horizontal quasi-zero stiffness modules 21 (a combined structure of a linear spring + a magnetic spring) in the horizontal direction and is orthogonally symmetrically arranged. It generates negative stiffness based on the first horizontal magnet assembly 211 and the second horizontal magnet assembly 212, while the upper spring 213 and the lower spring 214 can generate positive stiffness, so that the quasi-zero stiffness effect is fully achieved in the horizontal direction; in the vertical direction, the first annular Halbach magnet assembly 311, the second annular Halbach magnet assembly 312, and the first linear spring 313 are combined to achieve the effect of a helical spring + a coaxial nested Halbach magnetic spring, fully achieving the quasi-zero stiffness effect in the vertical direction.

[0067] With the above settings, the oscillator 42 in the three-way vibration absorption structure 4 of this solution integrates an annular Halbach array to enhance the internal magnetic field strength, thus facilitating the more efficient conversion of vibration energy into electric energy.

[0068] Through the above-mentioned setting, this solution can fully utilize the cubic nonlinear stiffness formed by the magnetic force and spring force in the vertical direction to achieve strong nonlinearity in different directions. The linear terms are eliminated through the optimization and matching design of the structural parameters, so that the vibration of the power battery can be transmitted to the Halbach array in the three-dimensional vibration absorption structure 4 as much as possible, and the relative movement between the Halbach array and the coil is enhanced for collection. Finally, the interface circuit is used to convert as much collected energy as possible into electrical energy for storage.

[0069] Through the above settings, the horizontal quasi-zero stiffness structure 2 and the vertical quasi-zero stiffness structure 3 of this scheme constitute a three-directional quasi-zero stiffness unit with a spatially orthogonal symmetrical layout, and combined with the three-directional vibration absorption structure 4 with a spatially orthogonal symmetrical layout, the vibration coupling in the x, y and z directions is fully reduced.

[0070] The above contents are merely examples of specific solutions of the present invention. For devices and structures not described in detail, it should be understood that they can be implemented by adopting general devices and methods available in the art.

[0071] The above description is merely one embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. Power battery multi-directional quasi-zero stiffness synchronous vibration damping and energy harvesting bracket, characterized in that Comprising: A bracket main body (1), a horizontal quasi-zero stiffness structure (2) and a vertical quasi-zero stiffness structure (3) arranged on the bracket main body (1) for connecting a power battery, a three-direction vibration absorption structure (4) for mounting on the power battery, and an energy recovery structure (5) connected to the three-direction vibration absorption structure (4); The horizontal quasi-zero stiffness structures (2) are regularly arranged along the circumferential direction of the bracket main body (1) for vibration damping support of the power battery in the horizontal direction; The vertical quasi-zero stiffness structure (3) provides vibration damping support for the power battery in the vertical direction; The three-direction vibration absorption structure (4) is mounted on the upper side of the power battery in the vertical direction for absorbing the vibration energy of the power battery; The energy recovery structure (5) is used for converting the vibration energy absorbed by the three-direction vibration absorption structure (4) into electric energy and outputting it.

2. The multi-directional quasi-zero stiffness synchronous vibration damping and energy harvesting bracket for power batteries according to claim 1, characterized in that, The horizontal quasi-zero stiffness structure (2) includes: four groups of horizontal quasi-zero stiffness modules (21); The static stiffness of each group of the horizontal quasi-zero stiffness modules (21) in the horizontal direction is 0; Along the circumferential direction of the bracket main body (1), the four groups of the horizontal quasi-zero stiffness modules (21) are regularly arranged at intervals; The horizontal quasi-zero stiffness module (21) includes: a first horizontal magnet assembly (211), a second horizontal magnet assembly (212), an upper spring (213) and a lower spring (214); The first horizontal magnet assembly (211) and the second horizontal magnet assembly (212) are arranged at intervals; wherein, the first horizontal magnet assembly (211) is used for connecting with the side wall of the power battery, and the second horizontal magnet assembly (212) is connected with the side wall of the bracket main body (1); The first horizontal magnet assembly (211) and the second horizontal magnet assembly (212) are respectively rectangular Halbach arrays; The opposite ends of the upper spring (213) are respectively connected with the upper side of the edge of the power battery and the upper side of the bracket main body (1); The opposite ends of the lower spring (214) are respectively connected with the lower side of the edge of the power battery and the lower side of the bracket main body (1); In the horizontal direction, the magnetic force between the first horizontal magnet assembly (211) and the second horizontal magnet assembly (212) is a repulsive force.

3. The multi-directional quasi-zero stiffness synchronous vibration damping and energy harvesting bracket for power batteries according to claim 2, wherein, The vertical quasi-zero stiffness structure (3) includes: a vertical quasi-zero stiffness module (31); The static stiffness of the vertical quasi-zero stiffness module (31) in the vertical direction is 0; The vertical quasi-zero stiffness module (31) includes: a first annular Halbach magnet assembly (311), a second annular Halbach magnet assembly (312) and a first linear spring (313); The first annular Halbach magnet assembly (311) is connected with the power battery; The second annular Halbach magnet assembly (312) is connected with the bottom surface of the bracket main body (1); The upper and lower ends of the first linear spring (313) are respectively connected with the lower side of the power battery and the bottom surface of the bracket main body (1); The first annular Halbach magnet assembly (311) and the second annular Halbach magnet assembly (312) are coaxially arranged.

4. The multi-directional quasi-zero stiffness synchronous vibration damping and energy harvesting bracket for power batteries according to claim 3, characterized in that, The first annular Halbach magnet assembly (311) includes: a plurality of first magnetic rings (311a); The plurality of first magnetic rings (311a) are coaxially arranged in the same plane, and there is a spaced arrangement between adjacent first magnetic rings (311a); The second annular Halbach magnet assembly (312) includes: a plurality of second magnetic rings (312a); The plurality of second magnetic rings (312a) are coaxially arranged in the same plane, and there is a spaced arrangement between adjacent second magnetic rings (312a).

5. The multi-directional quasi-zero stiffness synchronous vibration damping and energy harvesting bracket for power batteries according to claim 4, characterized in that, The first magnetic ring (311a) and the second magnetic ring (312a) are arranged in a staggered manner; The spacing between adjacent first magnetic rings (311a) is greater than the radial width of the second magnetic ring (312a); The spacing between adjacent second magnetic rings (312a) is greater than the radial width of the first magnetic ring (311a).

6. The multi-directional quasi-zero stiffness synchronous vibration damping and energy harvesting bracket for power batteries according to claim 5, wherein The first magnetic ring (311a) has at least one first ring body (311a1); If the first magnetic ring (311a) has a plurality of the first ring bodies (311a1), the plurality of first ring bodies (311a1) are coaxially connected in a nested manner; The second magnetic ring (312a) has at least one second ring body (312a1); If the second magnetic ring (312a) has a plurality of the second ring bodies (312a1), the plurality of second ring bodies (312a1) are coaxially connected in a nested manner.

7. The multi-directional quasi-zero stiffness synchronous vibration damping and energy harvesting bracket for power batteries according to claim 6, wherein The upper end of the first linear spring (313) is nested with the inner / outer side of the first magnetic ring (311a), and the upper end surface of the first linear spring (313) is fixedly connected to the lower side of the power battery. The lower end of the first linear spring (313) is nested with the outer / inner side of the second magnetic ring (312a), and the lower end surface of the first linear spring (313) is fixedly connected to the bottom surface of the bracket body (1).

8. The multi-directional quasi-zero stiffness synchronous vibration damping and energy harvesting bracket for power batteries according to claim 7, characterized in that, The first horizontal magnet assembly (211) includes: an odd number of first rectangular magnets, and the plurality of first rectangular magnets are arranged in sequence along the side wall of the power battery; In the first horizontal magnet assembly (211), the magnetization directions between adjacent first rectangular magnets are opposite, and the magnetization direction of the first rectangular magnet in the middle position is set in the direction towards the second horizontal magnet assembly (212); The second horizontal magnet assembly (212) includes: an odd number of second rectangular magnets, and the plurality of second rectangular magnets are arranged in sequence along the side wall of the bracket body (1); In the second horizontal magnet assembly (212), the magnetization directions between adjacent second rectangular magnets are opposite, and the magnetization direction of the second rectangular magnet in the middle position is set in the direction towards the first horizontal magnet assembly (211); An odd number of the first magnetic rings (311a) are provided in the first annular Halbach magnet assembly (311), and an odd number of the second magnetic rings (312a) are provided in the second annular Halbach magnet assembly (312), and the number of the first magnetic rings (311a) is the same as that of the second magnetic rings (312a); The first magnetic ring (311a) has a three-layer stacked structure; Along the radial direction of the first annular Halbach magnet assembly (311), the innermost first magnetic ring (311a) has a first ring body (311a1). Among them, the magnetization directions of the layers in the first ring body (311a1) change counterclockwise by 90° from top to bottom, and the magnetization direction of the middle layer is radially inward; Along the radial direction of the first annular Halbach magnet assembly (311), the first magnetic rings (311a) in the remaining positions have two first ring bodies (311a1). Among them, the magnetization directions of the layers in the first ring body (311a1) on the inner side of the first magnetic ring (311a) change clockwise by 90° from top to bottom, and the magnetization direction of the middle layer is radially outward. The magnetization directions of the layers in the first ring body (311a1) on the outer side of the first magnetic ring (311a) change counterclockwise by 90° from top to bottom, and the magnetization direction of the middle layer is radially inward; The second magnetic ring (312a) has a five-layer stacked structure; Along the radial direction of the second annular Halbach magnet assembly (312), the outermost second magnetic ring (312a) has a second ring body (312a1). Among them, the magnetization directions of the layers in the second ring body (312a1) change clockwise by 90° from top to bottom, and the magnetization direction of the middle layer is radially outward; Along the radial direction of the second annular Halbach magnet assembly (312), the second magnetic rings (312a) in the remaining positions have two second ring bodies (312a1). Among them, the magnetization directions of the layers in the second ring body (312a1) on the inner side of the second magnetic ring (312a) change clockwise by 90° from top to bottom, and the magnetization direction of the middle layer is radially outward. The magnetization directions of the layers in the second ring body (312a1) on the outer side of the second magnetic ring (312a) change counterclockwise by 90° from top to bottom, and the magnetization direction of the middle layer is radially inward.

9. The multi-directional quasi-zero stiffness synchronous vibration damping and energy harvesting bracket for power batteries according to claim 8, characterized in that The three-way vibration absorption structure (4) has a space orthogonally symmetric layout, and includes: a vibration absorption structure housing (41), an oscillator (42) provided in the vibration absorption structure housing (41), and a third linear spring (43) for connecting the vibration absorption structure housing (41) and the oscillator (42); The vibration absorption structure housing (41) is a hollow housing with a regular structure; Along the vertical direction, third magnetic rings (411) are connected to the inner walls at the upper and lower ends of the vibration absorption structure housing (41); The third magnetic ring (411) has at least one third ring body (411a). Among them, if there are multiple third ring bodies (411a), the multiple third ring bodies (411a) are coaxially stacked. Vertically, a hollow annular connector (412) is provided at the middle position of the inner side wall of the vibration absorption structure housing (41); A fourth magnetic ring (412a) is provided inside the annular connector (412); The oscillator (42) has a regular structure, which includes: a hollow oscillator housing (421), a fifth magnetic ring (422) and a sixth magnetic ring (423) arranged coaxially inside the oscillator housing (421); Vertically, the fifth magnetic ring (422) is symmetrically arranged on opposite sides of the sixth magnetic ring (423); The fifth magnetic ring (422) has at least one fifth ring body (422a), wherein if there are multiple fifth ring bodies (422a), the multiple fifth ring bodies (422a) are stacked coaxially; The axial thickness of the sixth magnetic ring (423) is the same as the axial thickness of the fourth magnetic ring (412a); Radially along the oscillator housing (421), one end of the third linear spring (43) is connected to the oscillator housing (421), and the other end of the third linear spring (43) is connected to the annular connector (412); Circumferentially along the oscillator housing (421), four third linear springs (43) are arranged at equal angular intervals; Vertically, the third linear spring (43), the third magnetic ring (411), and the fifth magnetic ring (422) form a cubic nonlinear stiffness; Horizontally, the third linear spring (43), the fourth magnetic ring (412a), and the sixth magnetic ring (423) form a quasi-zero stiffness.

10. The multi-directional quasi-zero stiffness synchronous vibration damping and energy harvesting bracket for power batteries according to claim 9, characterized in that, The energy recovery structure (5) includes: a coil (51) and a power conversion interface circuit (52) connected to the coil (51); The coil (51) is wound around the vibration absorption structure housing (41); The power conversion interface circuit (52) is installed on the bracket main body (1); The power conversion interface circuit (52) uses a bridge rectifier circuit.

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