Alternating magnetic field generating device structure for healthy charging of lithium battery

By using permanent magnet rotation to control the direction and strength of the alternating magnetic field in the lithium battery charging device, the problems of complex structure, high cost and difficult regulation in the prior art are solved, and the effects of uniform movement of lithium ions and extended battery life are achieved.

CN223308823UActive Publication Date: 2025-09-05FOSHAN UNIVERSITY +1
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Patent Information

Application Number
CN202422577311.6
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-10-24
Publication Date
2025-09-05
Estimated Expiration
2034-10-24

AI Technical Summary

Technical Problem

In the existing lithium battery charging devices, the Hemholtz coil has a complex structure, high cost, difficult to regulate, high requirements for power supply stability, and difficult to regulate the magnetic field angle, resulting in lithium dendrites and battery safety hazards.

Method used

The structure includes a charging bracket, a battery fixing plate, a shield cover, a permanent magnet, a fixing frame, a rotating frame and a DC motor is adopted to control the direction and strength of the alternating magnetic field through the rotation of the permanent magnet, and the rotation of the magnetic inductive line between the permanent magnets is used to generate a stable alternating magnetic field, simplifying the device structure.

Benefits of technology

The uniform movement of lithium ions during the charging process of lithium battery is achieved, which avoids the generation of lithium dendrites, extends the battery cycle life, and reduces the device failure rate and cost.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses an alternating magnetic field generating device structure for healthy charging of a lithium battery, which belongs to the technical field of battery charging and comprises a charging support, a battery fixing plate, a shielding cover, a permanent magnet 1, a permanent magnet 2, a fixing frame, a rotating frame, a direct-current motor and a base, the direct-current motor is arranged on the base, and a rotating shaft of the direct-current motor is connected with a bottom shaft of the rotating frame. Two ends of the rotating frame are respectively provided with a slide rail with a measuring range of 10cm and an indexing value of 0.1 cm. The alternating magnetic field is utilized to enable lithium ions to move more uniformly in a lithium battery charging process, lithium ion enrichment in the charging process is avoided, the cycle life of the battery is prolonged, the alternating magnetic field is generated by adopting a passive mode of the permanent magnet, the structure of the magnetic field generating device is simplified, and the service life of the battery is prolonged. And the failure rate and the cost of the device are reduced.
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Description

Technical Field

[0001] The utility model relates to an alternating magnetic field generating device structure for healthy charging of a lithium battery, belonging to the technical field of battery charging. Background Art

[0002] As lithium batteries are used more and more widely, people's safety requirements for lithium batteries are also getting higher and higher.

[0003] Lithium batteries are prone to lithium deposition at the negative electrode during high-rate charging.

[0004] Lithium deposition can easily form lithium dendrites, and the continuous growth of lithium dendrites may pierce the diaphragm, causing a short circuit in the battery, triggering thermal runaway, and causing serious safety accidents such as battery fire and explosion.

[0005] As a contactless energy transfer method, magnetic field can produce magnetohydrodynamic effect on charged particles inside the battery.

[0006] The purpose of forming an alternating magnetic field is to regulate the strength and direction of the magnetic field in real time, change the direction of particle flow by generating Lorentz forces of different sizes and directions, induce convection, promote the mass transfer process and uniform distribution of charged particles, thereby effectively inhibiting the formation of lithium dendrites and "dead lithium" inside the battery and extending the battery cycle life.

[0007] Therefore, the direction and intensity of the alternating magnetic field should be as stable as possible and can be adjusted at any time according to needs.

[0008] Currently, the structure that generates the alternating magnetic field is mainly the Helmholtz coil.

[0009] Among them, a coil with alternating current is used as a magnetic field generating source. This structure is applied to the charging device, which has high requirements on the quality of the power generated by the AC power supply and requires a complex structural design to ensure the safety of the charging device.

[0010] In addition, the angle of the magnetic field generated by the Helmholtz coil is not easy to control.

[0011] In general, the alternating magnetic field generating device currently using a Helmholtz coil as the main structure has problems such as complex structure, high cost, difficulty in control, and high requirements for power supply stability.

[0012] In view of the deficiencies in the prior art, there is a need for an alternating magnetic field generating device structure for healthy charging of lithium batteries to improve the above-mentioned deficiencies. Utility Model Content

[0013] The main purpose of the utility model is to provide an alternating magnetic field generating device structure for healthy charging of lithium batteries.

[0014] The purpose of the utility model can be achieved by adopting the following technical solutions:

[0015] An alternating magnetic field generating device structure for healthy charging of lithium batteries, comprising a charging bracket, a battery fixing plate, a shielding cover, a permanent magnet 1, a permanent magnet 2, a fixing frame, a rotating frame, a DC motor and a base;

[0016] A DC motor is provided on the base, the rotating shaft of the DC motor is connected to the bottom shaft of the rotating frame, and slide rails with a measuring range of 10 cm and a graduation value of 0.1 cm are provided at both ends of the rotating frame.

[0017] Preferably, fixed frames are respectively provided on the slide rails at both ends of the rotating frame, and a rectangular groove with a depth of 1 cm is provided on the fixed frame for placing the permanent magnets 1 and 2.

[0018] Preferably, two baffles with a height of 3 cm are provided at both ends of the rectangular groove on the fixing frame. The groove on the fixing frame is fixed with permanent magnet 1 and permanent magnet 2. The fixing frame is moved according to the scale of the slide rails at both ends to change the distance between permanent magnet 1 and permanent magnet 2.

[0019] Preferably, the DC motor rotates to drive the rotating frame to rotate, and the fixed frames at both ends of the rotating frame and the permanent magnets 1 and 2 rotate accordingly.

[0020] Preferably, the rotation direction and speed of the magnetic flux lines between permanent magnet 1 and permanent magnet 2 are consistent with the rotation direction and speed of the DC motor, and the inside of the shielding cover is connected to the top of the charging bracket.

[0021] Preferably, square tracks are provided at both ends of the bottom of the charging bracket, battery fixing plates are provided on the square tracks, and the battery fixing plates at both ends are moved according to the size of the battery to clamp and fix the battery, and a DC power supply is provided on the top of the charging bracket.

[0022] Beneficial technical effects of the utility model:

[0023] The utility model provides an alternating magnetic field generating device structure for healthy charging of lithium batteries, which utilizes the alternating magnetic field to make the movement of lithium ions more uniform during the charging process of the lithium battery, thereby avoiding lithium ion enrichment during the charging process and extending the battery cycle life.

[0024] The passive method of using permanent magnets to generate an alternating magnetic field simplifies the structure of the magnetic field generating device and reduces the failure rate and cost of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the internal structure of an alternating magnetic field generating device for healthy charging of lithium batteries according to a preferred embodiment of the structure of an alternating magnetic field generating device for healthy charging of lithium batteries of the present invention;

[0026] Figure 2This is a schematic diagram of the internal structure of an alternating magnetic field generating device for healthy charging of lithium batteries according to a preferred embodiment of the present invention;

[0027] Figure 3 A preferred embodiment of the alternating magnetic field generating device structure for healthy charging of lithium batteries according to the utility model Figure 1 Front inner view of the middle part (1);

[0028] Figure 4 A preferred embodiment of the alternating magnetic field generating device structure for healthy charging of lithium batteries according to the utility model Figure 1 Axonometric view of the middle part (1);

[0029] Figure 5 According to a preferred embodiment of the structure of an alternating magnetic field generating device for healthy charging of a lithium battery of the utility model Figure 1 Axial internal view of the middle part (2);

[0030] Figure 6 A preferred embodiment of the alternating magnetic field generating device structure for healthy charging of lithium batteries according to the utility model Figure 1 Axial internal view of the middle part (3);

[0031] Figure 7 According to a preferred embodiment of the structure of an alternating magnetic field generating device for healthy charging of a lithium battery of the utility model Figure 1 Axial internal view of middle parts (4) and (5);

[0032] Figure 8 According to a preferred embodiment of the structure of an alternating magnetic field generating device for healthy charging of a lithium battery of the utility model Figure 1 Axial internal view of the middle part (6);

[0033] Figure 9 A preferred embodiment of the alternating magnetic field generating device structure for healthy charging of lithium batteries according to the utility model Figure 1 Front inner view of the middle part (7);

[0034] Figure 10 A preferred embodiment of the alternating magnetic field generating device structure for healthy charging of lithium batteries according to the utility model Figure 1 Axial inner view of the middle part (7);

[0035] Figure 11 A preferred embodiment of the alternating magnetic field generating device structure for healthy charging of lithium batteries according to the utility model Figure 1 a front view of the middle part (8);

[0036] Figure 12 A preferred embodiment of the alternating magnetic field generating device structure for healthy charging of lithium batteries according to the utility model Figure 1 Axial inner view of the middle part (8);

[0037] Figure 13 A preferred embodiment of the alternating magnetic field generating device structure for healthy charging of lithium batteries according to the utility model Figure 1 Axonometric view of the middle part (9);

[0038] Figure 14 This is a schematic diagram of the scale values ​​of the slide rail in an embodiment of a preferred embodiment of the structure of an alternating magnetic field generating device for healthy charging of a lithium battery according to the present utility model;

[0039] Figure 15 This is a schematic diagram of the charging connection of a battery in a charging stand according to a preferred embodiment of an alternating magnetic field generating device structure for healthy charging of a lithium battery of the present invention;

[0040] Figure 16 This is a schematic diagram of the movement trajectory of lithium ions inside the battery during the charging process in an embodiment of a preferred embodiment of the alternating magnetic field generating device structure for healthy charging of a lithium battery according to the present invention.

[0041] In the figure: 1. Charging bracket; 2. Battery fixing plate; 3. Shielding cover; 4. Permanent magnet 1; 5. Permanent magnet 2; 6. Fixed frame; 7. Rotating frame; 8. DC motor; 9. Base. DETAILED DESCRIPTION

[0042] In order to make the technical solution of the present invention more clear and specific to those skilled in the art, the present invention is described in further detail below with reference to embodiments and drawings, but the implementation manner of the present invention is not limited thereto.

[0043] like Figure 1 - Figure 16 As shown, the present embodiment provides an alternating magnetic field generating device structure for healthy charging of lithium batteries, including a charging bracket 1, a battery fixing plate 2, a shielding cover 3, a permanent magnet 14, a permanent magnet 25, a fixing frame 6, a rotating frame 7, a DC motor 8 and a base 9;

[0044] A DC motor 8 is provided on the base 9, and the rotating shaft of the DC motor 8 is connected to the bottom shaft of the rotating frame 7. Both ends of the rotating frame 7 are provided with slide rails with a measuring range of 10 cm and a graduation value of 0.1 cm.

[0045] Fixed frames 6 are respectively provided on the slide rails at both ends of the rotating frame 7 . The fixed frames 6 are provided with rectangular grooves with a depth of 1 cm for placing the permanent magnets 14 and 25 .

[0046] Two baffles with a height of 3 cm are provided at both ends of the rectangular groove on the fixing frame 6. The groove on the fixing frame 6 is fixed with permanent magnets 14 and 25. The fixing frame 6 is moved according to the scales of the slide rails at both ends to change the distance between the permanent magnets 14 and 25.

[0047] The DC motor 8 rotates to drive the rotating frame 7 to rotate, and the fixed frames 6 and the permanent magnets 14 and 25 at both ends of the rotating frame 7 rotate accordingly.

[0048] The rotation direction and speed of the magnetic flux lines between the permanent magnets 14 and 24 are consistent with the rotation direction and speed of the DC motor 7 , and the inside of the shielding cover 3 is connected to the top of the charging bracket 1 .

[0049] Square tracks are set at both ends of the bottom of the charging bracket 1, and battery fixing plates 2 are set on the square tracks. The battery fixing plates 2 at both ends are moved according to the size of the battery to clamp and fix the battery. A DC power supply is set on the top of the charging bracket 1.

[0050] like Figure 1 - Figure 16 As shown, the working process of the alternating magnetic field generating device structure for healthy charging of lithium batteries provided in this embodiment is as follows: comprising a charging bracket 1 (such as Figure 3 、 Figure 4 ), battery fixing plate 2 (such as Figure 5 ), shielding cover 3 (such as Figure 6 ), permanent magnet 14, permanent magnet 2 5 (such as Figure 7 ), fixed frame 6 (such as Figure 8 ), rotating frame 7 (such as Figure 9 、 Figure 10 ), DC motor 8 (such as Figure 11 、 Figure 12 ), base 9 (such as Figure 13 ), a DC motor 8 is provided on the base 9, the rotating shaft of the DC motor 8 is connected to the bottom shaft of the rotating frame 7, and the two ends of the rotating frame 7 are respectively provided with a slide rail with a range of 10 cm and a graduation value of 0.1 cm (such as Figure 14 ), the fixing frame 6 is respectively provided on the slide rails at both ends, and the fixing frame 6 is provided with a rectangular groove with a depth of 1 cm for placing the permanent magnet 14 and the permanent magnet 25. Two baffles with a height of 3 cm are provided at both ends of the rectangular groove for fixing the permanent magnet 14 and the permanent magnet 25. The fixing frame 6 is moved according to the scale of the slide rails at both ends to change the distance between the permanent magnet 14 and the permanent magnet 25 to achieve a change in the magnetic field strength;

[0051] The DC motor 8 rotates to drive the rotating frame 7 to rotate, and the fixed frames 6 at both ends of the rotating frame 7 and the permanent magnets 14 and 25 rotate accordingly. The rotation direction and speed of the magnetic flux lines between the permanent magnets 14 and 24 are consistent with the rotation direction and speed of the DC motor 7, thereby achieving a change in the direction of the magnetic field.

[0052] The inside of the shielding cover 3 is connected to the top of the charging bracket 1. The shielding cover 3 is used to prevent the alternating magnetic field generated during rotation from affecting external devices. Square tracks are set at both ends of the bottom of the charging bracket 1. The battery fixing plate 2 is set on the square track. The battery fixing plate 2 at both ends is moved according to the size of the battery and is used to clamp and fix the battery. A DC power supply is provided on the top of the charging bracket 1. The DC power supply is used to provide charging current and charging voltage for the lithium battery (such as Figure 15 ), during the charging process, the lithium ions inside the battery are affected by the magnetic field, and their movement trajectory changes (such as Figure 16 ).

[0053] Example

[0054] like Figure 1 - Figure 16 As shown, the alternating magnetic field generating device for healthy charging of lithium batteries includes a charging bracket 1 (as shown Figure 3 、 Figure 4 ), battery fixing plate 2 (such as Figure 5 ), shielding cover 3 (such as Figure 6 ), permanent magnet 14, permanent magnet 25 (such as Figure 7 ), fixed frame 6 (such as Figure 8 ), rotating frame 7 (such as Figure 9 、 Figure 10 ), DC motor 8 (such as Figure 11 、 Figure 12 ), base 9 (such as Figure 13 ), a DC motor 8 is provided on the base 9, the rotating shaft of the DC motor 8 is connected to the bottom shaft of the rotating frame 7, and the two ends of the rotating frame 7 are respectively provided with a slide rail with a range of 10 cm and a graduation value of 0.1 cm (such as Figure 14), the fixed frame 6 is respectively provided on the slide rails at both ends, and a rectangular groove with a depth of 1 cm is provided on the fixed frame 6 for placing the permanent magnet 14 and the permanent magnet 25. Two baffles with a height of 3 cm are provided at both ends of the rectangular groove for fixing the permanent magnet 14 and the permanent magnet 25. The fixed frame 6 is moved according to the scale of the slide rails at both ends to change the distance between the permanent magnet 14 and the permanent magnet 25 to achieve a change in the magnetic field strength. The DC motor 8 is used to rotate and drive the rotating frame 7 to rotate, and the fixed frames 6 and the permanent magnets 14 and 25 at both ends of the rotating frame 7 rotate accordingly. The rotation direction and speed of the magnetic flux lines between the permanent magnets 14 and 24 are consistent with the rotation direction and speed of the DC motor 7, so that the direction of the magnetic field changes. The interior of the shielding cover 3 is connected to the top of the charging bracket 1. The shielding cover 3 is used to prevent the alternating magnetic field generated during rotation from affecting external devices. Square tracks are set at both ends of the bottom of the charging bracket 1, and the battery fixing plate 2 is set on the square track. The battery fixing plate 2 at both ends is moved according to the size of the battery and is used to clamp and fix the battery. A DC power supply is provided on the top of the charging bracket 1. The DC power supply is used to provide charging current and charging voltage for the lithium battery. Figure 15 During the charging process, the lithium ions inside the battery are affected by the magnetic field and their movement trajectory changes (such as Figure 16 ), using an alternating magnetic field to make the movement of lithium ions more uniform during the charging process of the lithium battery, avoiding lithium ion enrichment during the charging process, and extending the battery cycle life. The passive method of using permanent magnets to generate an alternating magnetic field simplifies the structure of the magnetic field generating device and reduces the failure rate and cost of the device.

[0055] The above is only a further embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes based on the technical solution and concept of the present invention within the scope disclosed by the present invention, which falls within the protection scope of the present invention.

Claims

1. An alternating magnetic field generating device structure for healthy charging of lithium batteries, characterized by: It comprises a charging bracket (1), a battery fixing plate (2), a shielding cover (3), a permanent magnet 1 (4), a permanent magnet 2 (5), a fixing frame (6), a rotating frame (7), a DC motor (8) and a base (9); A DC motor (8) is provided on the base (9), a rotating shaft of the DC motor (8) is connected to a bottom shaft of the rotating frame (7), and two ends of the rotating frame (7) are respectively provided with slide rails with a measuring range of 10 cm and a graduation value of 0.1 cm.

2. The alternating magnetic field generating device structure for healthy charging of lithium batteries according to claim 1, characterized in that: A fixed frame (6) is respectively provided on the slide rails at both ends of the rotating frame (7), and a rectangular groove with a depth of 1 cm is provided on the fixed frame (6) for placing the permanent magnet 1 (4) and the permanent magnet 2 (5).

3. The alternating magnetic field generating device structure for healthy charging of a lithium battery according to claim 2, characterized in that: Two baffles with a height of 3 cm are provided at both ends of the rectangular groove on the fixing frame (6). The groove on the fixing frame (6) is fixed with a permanent magnet 1 (4) and a permanent magnet 2 (5). The fixing frame (6) is moved according to the scales of the slide rails at both ends to change the distance between the permanent magnet 1 (4) and the permanent magnet 2 (5).

4. The alternating magnetic field generating device structure for healthy charging of a lithium battery according to claim 3, characterized in that: The DC motor (8) rotates to drive the rotating frame (7) to rotate, and the fixed frames (6) at both ends of the rotating frame (7) and the permanent magnets 1 (4) and 2 (5) rotate accordingly.

5. The alternating magnetic field generating device structure for healthy charging of lithium batteries according to claim 4, characterized in that: The rotation direction and speed of the magnetic flux lines between the permanent magnet 1 (4) and the permanent magnet 2 (5) are consistent with the rotation direction and speed of the DC motor (8), and the inside of the shielding cover (3) is connected to the top of the charging bracket (1).

6. The alternating magnetic field generating device structure for healthy charging of lithium batteries according to claim 5, characterized in that: Square tracks are provided at both ends of the bottom of the charging bracket (1), and battery fixing plates (2) are provided on the square tracks. The battery fixing plates (2) at both ends are moved according to the size of the battery to clamp and fix the battery. A DC power supply is provided on the top of the charging bracket (1).