Magnetoelectric coupling inductive equalization energy storage device

Abstract

The utility model relates to new energy energy storage technical field discloses a kind of magnetoelectric coupling inductance equalization energy storage devices, is arranged at the top of cascade utilization battery pack, including mounting seat, the mounting seat is configured as insulator, the side of the mounting seat is equipped with the interface component for and the electrical connection of cascade utilization battery pack, the upper end of the mounting seat is equipped with top plate, the top plate is equipped with magnetic core assembly, the magnetic core assembly is equipped with several coil assemblies, the coil assembly forms uniform magnetic field after electrification, the coil assembly and magnetic core assembly form coupling inductance;The inside of the mounting seat is equipped with two rows of conducting terminal, and the conducting terminal is equipped with conducting washer.The utility model has the beneficial effect that charge-discharge precision is high, charging speed is fast, and power balance difference is small.

Description

Technical Field

[0001] This utility model relates to the field of new energy storage technology, and more specifically, to a magnetoelectric coupling inductive equalization energy storage device. Background Technology

[0002] To conserve energy and reduce emissions, a large number of batteries from retired new energy vehicles are being used for grid-side energy storage. However, the storage management problems brought about by the use of these batteries are numerous. Due to the complex sources and varying operating conditions of the retired batteries, their internal capacity specifications differ significantly. Therefore, without precise sequencing and control strategies during charging, overcharging and over-discharging can easily occur, which not only significantly shortens battery life but also poses serious safety hazards. On the other hand, due to factors such as battery aging and increased internal impedance, the charging speed of these batteries is significantly lagging, making it difficult to meet the grid-side's demand for rapid energy storage and peak shaving, and unable to respond promptly to power dispatch instructions during peak electricity consumption periods.

[0003] Traditional charging strategies, employing fixed voltage / current thresholds (such as CC-CV mode), cannot adapt to the differences in capacity decay rates (20%-40%) and internal resistance dispersion (>30%) between battery cells used in tiered applications. This results in high-degradation batteries reaching their cutoff threshold prematurely at the end of charging due to polarization voltage, leading to insufficient actual charge. Conversely, low-internal-resistance batteries are excessively drained during discharge, accelerating capacity degradation. Furthermore, current energy management devices in traditional energy storage equipment typically employ passive equalization management, consuming the energy of high-capacity cells through resistive discharge, directly converting electrical energy into heat energy and wasting it. This results in an effective charging energy utilization rate of <40%, further reducing the energy storage efficiency of the energy storage device. Therefore, a new technology is urgently needed to address these issues. Utility Model Content

[0004] In order to solve the above-mentioned problems in the prior art, this utility model provides a magnetoelectric coupling inductive equalization energy storage device with high charging and discharging accuracy, fast charging speed, and small power balance difference.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A magnetoelectric coupling inductive equalization energy storage device is installed on top of a secondary battery pack. It includes a mounting base configured as an insulator. The side of the mounting base has an interface assembly for electrical connection with the secondary battery pack. A top plate is fixed to the upper end of the mounting base, and a magnetic core assembly is provided on the top plate. The magnetic core assembly contains several coil assemblies. When energized, the coil assemblies form a uniform magnetic field, and the coil assemblies and the magnetic core assembly form a coupled inductance. The interior of the mounting base has two rows of conductive terminals, each with a conductive washer.

[0006] By adopting the above technical solution: this magnetoelectric coupling inductive equalization energy storage device is installed above the center of the top of a regular matrix-type cascaded battery pack, with a relatively balanced distance to each battery; after the coil assembly is energized, a magnetic field is generated according to Ampere's law, and the magnetic field energy is stored in the coil assembly and the magnetic core assembly. The magnetic core assembly converts electrical energy into magnetic field energy for storage. When the magnetic field changes rapidly, the conductive terminal-conductive washer generates an induced electromotive force in real time due to the Faraday electromagnetic induction principle, forming an electric field distribution, which promotes charge flow and generates current transformation. The conductive terminal guides the current to the low-voltage cells of the battery pack, achieving charge equalization; the coil assembly adjusts the magnetic field energy of each energy storage unit according to the current change, realizing charge redistribution, and after equalization, it is converted into electrical energy and output to the battery pack; through the high-efficiency magnetoelectric conversion of the magnetic core assembly-coil assembly and the low-resistance connection of the conductive terminal-conductive washer, the transmission loss is further reduced, resulting in high overall charging and discharging efficiency and high equalization accuracy.

[0007] Preferably, the interface component includes a power interface, a voltage and current sampling interface, an equalization control interface, and a hardware protection interface, wherein the power interface, voltage and current sampling interface, equalization control interface, and hardware protection interface are all directly plugged in.

[0008] Preferably, the magnetic core assembly includes a magnetic core mounting base and a magnetic core body. The magnetic core mounting base is configured in two sets. The top surface of the magnetic core mounting base is provided with a magnetic core positioning groove. Both ends of the magnetic core body are provided with positioning pieces that are inserted and positioned in the magnetic core positioning groove. The side of the magnetic core body is provided with a coil positioning groove. The coil assembly is disposed in the coil positioning groove. The magnetic core body is provided with pins for positioning the coil assembly.

[0009] Preferably, the coil assembly is configured as a Helmholtz coil group, each Helmholtz coil group including two parallel coil bodies; the coil bodies in the same Helmholtz coil group are coaxially distributed and the spacing is equal to the radius of the coil body.

[0010] Preferably, the conductive terminal and the conductive washer are connected by electromagnetic adsorption. The conductive terminal generates a periodic magnetic field through alternating current, which causes the conductive washer to generate an eddy current magnetic field. The eddy current magnetic field interacts with the array magnetic field to form an attractive force.

[0011] Preferably, the mounting base has a plurality of conductive terminal positioning grooves inside, corresponding to the conductive terminals, and the conductive terminals are respectively disposed in the conductive terminal positioning grooves; the upper end of the mounting base has a top plate slot, and the bottom surface of the top plate has a snap-fit ​​protrusion that snaps into the top plate slot.

[0012] Therefore, this invention has the advantages of high charging and discharging accuracy, fast charging speed, and small difference in power balance. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of one structure of the present utility model.

[0014] Figure 2 for Figure 1 The left view.

[0015] Figure 3 for Figure 1 Exploded view.

[0016] Figure 4 yes Figure 1 Another perspective of the exploded view.

[0017] In the diagram: 1-Mounting base, 11-Interface assembly, 12-Conductive terminal positioning slot, 13-Top plate slot, 2-Top plate, 21-Snap-fit ​​protrusion, 3-Core assembly, 31-Core mounting base, 311-Core positioning slot, 32-Core body, 321-Positioning piece, 322-Coil positioning slot, 323-Pin, 4-Conductive terminal, 41-Conductive washer, 5-Coil assembly, 111-Power interface, 112-Voltage and current sampling interface, 113-Equalization control interface, 114-Hardware protection interface. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments: To make the technical problems to be solved, the technical solutions, and the beneficial technical effects of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and several exemplary embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of protection of this invention.

[0019] It should be understood that the terms "first," "second," etc., used herein are for descriptive purposes only and should not be construed as indicating or implying relative importance, nor should they be construed as implicitly specifying the number of technical features indicated. Features specified as "first" or "second" may expressly or implicitly indicate that at least one of those features is included.

[0020] like Figures 1-4The illustrated magnetoelectric coupling inductive equalization energy storage device is mounted on top of a secondary battery pack. It includes a mounting base 1, which is configured as an insulator. The side of the mounting base 1 has an interface assembly 11 for electrical connection with the secondary battery pack. A top plate 2 is fixed to the upper end of the mounting base 1, and a magnetic core assembly 3 is mounted on the top plate 2. The magnetic core assembly 3 contains several coil assemblies 5. When energized, the coil assemblies 5 form a uniform magnetic field, and the coil assemblies 5 and the magnetic core assembly 3 form a coupled inductance. Two rows of conductive terminals 4 are provided inside the mounting base 1, and conductive washers 41 are provided on the conductive terminals 4. The conductive terminals 4 and the conductive washers 41 are connected by electromagnetic attraction. The conductive terminals 4 generate a periodic magnetic field through alternating current, causing the conductive washers 41 to generate eddy current magnetic fields. The eddy current magnetic fields interact with the array magnetic field to form an attractive force.

[0021] The interface component 11 includes a power interface 111, a voltage and current sampling interface 112, an equalization control interface 113, and a hardware protection interface 114. The power interface 111, voltage and current sampling interface 112, equalization control interface 113, and hardware protection interface 114 are all connected by a direct plug-in connection.

[0022] The magnetic core assembly 3 includes a magnetic core mounting base 31 and a magnetic core body 32. The magnetic core mounting base 31 is configured in two sets. The top surface of the magnetic core mounting base 31 is provided with a magnetic core positioning groove 311. Both ends of the magnetic core body 32 are provided with positioning pieces 321 that are inserted into and positioned in the magnetic core positioning groove 311. The side of the magnetic core body 32 is provided with a coil positioning groove 322. The coil assembly 5 is disposed in the coil positioning groove 322. The magnetic core body 32 is provided with a pin 323 for positioning the coil assembly 5.

[0023] In some embodiments, the coil assembly 5 is configured as a Helmholtz coil group, each Helmholtz coil group including two parallel coil bodies; the coil bodies in the same Helmholtz coil group are coaxially distributed and the spacing is equal to the radius of the coil body.

[0024] The mounting base 1 has a plurality of conductive terminal positioning grooves 12 corresponding to the conductive terminals 4 inside, and the conductive terminals 4 are respectively arranged in the conductive terminal positioning grooves 12; the upper end of the mounting base 1 is provided with a top plate slot 13, and the bottom surface of the top plate 2 is provided with a snap-fit ​​protrusion 21 that snaps into the top plate slot 13.

[0025] Referring to the accompanying drawings, the principle of this invention is as follows: A magnetoelectric coupling inductive equalization energy storage device is installed above the center of the top of a regular matrix-type cascaded utilization battery pack, such as... Figure 1As shown, the power interface 111, voltage and current sampling interface 112, equalization control interface 113, and hardware protection interface 114 in the interface component 11 are respectively connected to the secondary battery pack to control the internal energy of the secondary battery pack. The energy is quickly matched and balanced through the magnetoelectric coupling inductor equalization device. The secondary battery pack transmits the internal electrical energy input to the coil component 5, which generates a magnetic field according to Ampere's law. The magnetic field energy is stored in the magnetic core component 3. The magnetic core component 3 converts electrical energy into magnetic field energy for storage. When the magnetic field changes rapidly, the conductive terminal 4-conductive washer 41 generates an induced electromotive force in real time due to the Faraday electromagnetic induction principle, forming an electric field distribution, which promotes charge flow and generates current transformation. The conductive terminal guides the current to flow to the low-voltage cells of the battery pack to achieve charge balance. The coil component adjusts the magnetic field energy of each energy storage unit according to the current change to achieve charge redistribution. After the equalization is completed, it is converted into electrical energy and output to the battery pack. The high-efficiency magnetoelectric conversion of the core assembly-coil assembly and the low-resistance connection of the conductive terminal-conductive washer further reduce transmission loss, resulting in high overall charging and discharging efficiency and high equalization accuracy.

[0026] In the description of this invention, it should be understood that the directions or positional relationships indicated by up, down, left, right, inner end, outer end, one end, and the other end are based on the orientation or positional relationships shown in the accompanying drawings. They are only for the purpose of more clearly describing the technical solutions of this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting this invention.

[0027] Although specific embodiments of the invention have been described in detail herein, they are given for illustrative purposes only and should not be construed as limiting the scope of the invention. Various substitutions, alterations, and modifications can be conceived without departing from the spirit and scope of the invention.

Claims

1. A magnetoelectric coupling inductive equalization energy storage device, installed on top of a secondary battery pack, characterized in that, The device includes a mounting base (1), which is configured as an insulator. The side of the mounting base (1) is provided with an interface assembly (11) for electrical connection with a secondary battery pack. A top plate (2) is fixed at the upper end of the mounting base (1). A magnetic core assembly (3) is provided on the top plate (2). A plurality of coil assemblies (5) are provided inside the magnetic core assembly (3). When the coil assembly (5) is energized, it forms a uniform magnetic field. The coil assembly (5) and the magnetic core assembly (3) form a coupled inductance. The interior of the mounting base (1) is provided with two rows of conductive terminals (4). Conductive washers (41) are provided on the conductive terminals (4).

2. The magnetoelectric coupled inductive equalization energy storage device according to claim 1, characterized in that, The interface component (11) includes a power interface (111), a voltage and current sampling interface (112), an equalization control interface (113), and a hardware protection interface (114). The power interface (111), voltage and current sampling interface (112), equalization control interface (113), and hardware protection interface (114) are all connected by a plug-in connection.

3. The magnetoelectric coupled inductive equalization energy storage device according to claim 1, characterized in that, The magnetic core assembly (3) includes a magnetic core mounting base (31) and a magnetic core body (32). The magnetic core mounting base (31) is configured in two sets. The top surface of the magnetic core mounting base (31) is provided with a magnetic core positioning groove (311). Both ends of the magnetic core body (32) are provided with positioning pieces (321) that are inserted into and positioned in the magnetic core positioning groove (311). The magnetic core body (32) has a coil positioning groove (322) on its side, and the coil assembly (5) is set in the coil positioning groove (322). The magnetic core body (32) has a pin (323) for positioning the coil assembly (5).

4. A magnetoelectric coupled inductive equalization energy storage device according to claim 1 or 3, characterized in that, The coil assembly (5) is configured as a Helmholtz coil group, each Helmholtz coil group including two parallel coil bodies; the coil bodies in the same Helmholtz coil group are coaxially distributed and the spacing is equal to the radius of the coil body.

5. The magnetoelectric coupled inductive equalization energy storage device according to claim 1, characterized in that, The conductive terminal (4) and the conductive gasket (41) are connected by electromagnetic adsorption.

6. The magnetoelectric coupled inductive equalization energy storage device according to claim 1, characterized in that, The mounting base (1) has several conductive terminal positioning grooves (12) corresponding to the conductive terminals (4) inside, and the conductive terminals (4) are correspondingly located in the conductive terminal positioning grooves (12); the upper end of the mounting base (1) is provided with a top plate slot (13), and the bottom surface of the top plate (2) is provided with a snap-fit ​​protrusion (21) that snaps into the top plate slot (13).

Images