Steel shell cylindrical battery with magnet

Abstract

The invention discloses a steel shell cylindrical battery with magnetic attraction, and relates to the technical field of lithium batteries. Comprising a steel shell, a battery core is arranged in the steel shell, the steel shell is provided with a battery core accommodating cavity, and one end of the steel shell is provided with an opening communicated with the battery core accommodating cavity; the protection plate is provided with a B + port, a B-port, a P + port and a P-port, the B + port of the protection plate is connected with the positive electrode lug of the battery cell through a positive electrode nickel sheet, and the B-port of the protection plate is connected with the negative electrode lug of the battery cell through a negative electrode nickel sheet; the fixing assembly is provided with two first through holes, the protection plate is arranged in the fixing assembly, the positions of the two first through holes correspond to the positions of a P + port and a P-port of the protection plate respectively, and magnetic electric shock plates with opposite polarities are arranged at the P + port and the P-port. And one end of the fixing assembly extends into the battery cell accommodating cavity from the opening and is fixedly connected with the steel shell. According to the steel shell cylindrical battery with the magnetic attraction, the positive electrode and the negative electrode of the battery are arranged at one end, and reverse installation of the battery is avoided through different polarities of the magnetic attraction plate.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium batteries, and more particularly to a steel-shell cylindrical battery with magnetic attraction. Background Art

[0002] With the rapid development of portable electronic devices, lithium-ion batteries have become the mainstream choice for various applications due to their high energy density, long cycle life, and environmental friendliness. Among the various lithium-ion battery forms, cylindrical batteries are widely favored due to their simple structure, low manufacturing cost, and high energy density.

[0003] However, existing cylindrical soft-pack batteries cannot be easily assembled and have the following problems during use: inconvenient connection: the positive and negative poles are distributed at both ends of the battery, and the device connection requires a specific interface design, which increases the complexity of the design; the risk of reverse installation: the positive and negative poles are distributed at both ends, which can easily lead to reverse installation of the battery, posing a safety hazard; insufficient mechanical strength: although the aluminum-plastic film of the soft-pack battery is light, it has low mechanical strength and is easily damaged by external forces; the external protection circuit increases the design complexity of the battery and is easily affected by the external environment. Summary of the Invention

[0004] In view of this, the present invention provides a steel-shell cylindrical battery with magnetic attraction, which guides the positive and negative poles of the battery to one end, distinguishes the positive and negative poles through a magnetic contact plate, ensures the accuracy of the connection between the battery and the external electrical appliance, and avoids the risk of reverse installation of the battery. In order to achieve the above purpose, the present invention adopts the following technical solutions: The present invention provides a steel-shell cylindrical battery with magnetic attraction, comprising: A steel shell, wherein a battery cell is disposed in the steel shell, the steel shell has a battery cell accommodating cavity, and one end of the steel shell is provided with an opening communicating with the battery cell accommodating cavity; A protection plate, wherein the protection plate is provided with a B+ port, a B- port, a P+ port, and a P- port, the B+ port of the protection plate is connected to the positive electrode tab of the battery cell via a positive electrode nickel sheet, and the B- port of the protection plate is connected to the negative electrode tab of the battery cell via a negative electrode nickel sheet; A fixing component, wherein the fixing component is provided with two first through holes, the protective plate is arranged inside the fixing component, the positions of the two first through holes respectively correspond to the positions of the P+ port and the P- port of the protective plate, and the P+ port and the P- port are provided with magnetic contact plates with opposite polarities, and one end of the fixing component extends from the opening into the battery cell accommodating cavity and is fixedly connected to the steel shell.

[0005] Furthermore, the positive electrode nickel sheet and the negative electrode nickel sheet are both L-shaped.

[0006] Furthermore, the fixing assembly includes a head cover and a bracket, the first through hole is provided on the head cover, the protective plate is pressed between the head cover and the bracket, the head cover is clamped with the bracket, and the head cover is connected to the steel shell.

[0007] Furthermore, a limiting ring is provided on the inner wall of the bracket, the diameter of the limiting ring is smaller than the diameter of the protective plate, a clamping plate is provided on the head cover, and a clamping slot is provided on the bracket. The protective plate is fixed between the head cover and the bracket through the cooperation of the limiting ring and the head cover, and the connection between the head cover and the bracket is achieved through the cooperation of the clamping plate and the clamping slot.

[0008] Furthermore, a connecting plate is provided on the head cover, a groove is provided on the side wall of the bracket, and the connecting plate passes through the groove and abuts against the inner wall of the steel shell.

[0009] Furthermore, the negative electrode tab extends from one end of the battery cell away from the opening of the steel shell to the end close to the groove, and the negative electrode nickel sheet extends from the B-port to the end close to the groove. The welding point between the negative electrode nickel sheet and the negative electrode tab is located in the groove, and the connecting plate is squeezed by the restraining force of the steel shell on the connecting plate.

[0010] Furthermore, a guide groove is provided on the steel shell, and a guide rail is provided on the outer wall of the head cover, and the guide rail slides in the guide groove.

[0011] It can be seen from the above technical solution that compared with the prior art, the present invention discloses a steel-shell cylindrical battery with magnetic attraction, which improves the rigidity of the battery through the steel shell, and sets the positive and negative poles of the battery at one end. The positive and negative poles of the battery are distinguished by the different polarities of the magnetic contact plate, avoiding the reverse installation of the battery and ensuring the accuracy of the battery connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0013] Figure 1 This is a schematic structural diagram of a steel-shell cylindrical battery with magnetic attraction provided by the present invention; Figure 2 An exploded view of the steel-shell cylindrical battery with magnetic attraction provided by the present invention; Figure 3This is a schematic structural diagram of the protection plate provided by the present invention.

[0014] In the figure: 1. Head cover; 2. Card plate; 3. Protection plate; 31. Positive nickel sheet; 32. N-pole contact plate; 33. S-pole contact plate; 34. Negative nickel sheet; 4. Bracket; 5. Card slot; 6. Positive tab; 7. Soft-pack battery cell; 8. Steel shell; 9. First through hole; 10. Connecting plate; 11. Groove; 12. Negative tab; 13. Guide groove; 14. Guide rail. DETAILED DESCRIPTION

[0015] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0016] See also Figure 1-3 The embodiment of the present invention discloses a steel-shell cylindrical battery with magnetic attraction, comprising: A steel shell 8, wherein a battery cell is disposed in the steel shell 8, the steel shell 8 has a battery cell accommodating cavity and one end of the steel shell 8 is provided with an opening communicating with the battery cell accommodating cavity; The protection board 3 is provided with a B+ port, a B- port, a P+ port, and a P- port. The B+ port of the protection board 3 is connected to the positive electrode tab 6 of the soft-pack battery cell 7 through the positive electrode nickel sheet 31, and the B- port of the protection board 3 is connected to the negative electrode tab 12 of the battery cell through the negative electrode nickel sheet 34; The fixing component is provided with two first through holes 9, and the protective plate 3 is arranged inside the fixing component. The positions of the two first through holes 9 correspond to the positions of the P+ port and the P- port of the protective plate 3 respectively. The P+ port and the P- port are provided with magnetic contact plates with opposite polarities. One end of the fixing component extends into the battery cell accommodating cavity through the opening and is fixedly connected to the steel shell 8.

[0017] In some embodiments, the battery cell is a soft-pack battery cell 7 .

[0018] The soft-pack battery cell 7 is placed in the steel shell 8 to improve the strength of the battery. The protection plate 3 and the soft-pack battery cell 7 are fixed inside the steel shell 8 by a fixing assembly.

[0019] The protection board 3 is used to charge and discharge the soft-pack battery cell 7 and to provide short-circuit protection for the soft-pack battery cell 7. By connecting the protective plate 3 to the positive electrode tab 6 and the negative electrode tab 12 respectively, the positive and negative poles of the battery are located at the same end of the battery. An N-pole contact plate 32 and an S-pole contact plate 33 are respectively provided at the P+ port and the P- port to facilitate the distinction between the positive and negative poles of the battery. In the battery slot where the battery is placed, an S-pole plate and an N-pole plate are respectively provided to cooperate with the N-pole contact plate 32 and the S-pole contact plate 33.

[0020] During the battery installation process, the cooperation between the N-pole contact plate 32 and the S-pole plate and the cooperation between the S-pole contact plate 33 and the N-pole plate prevents the battery from being installed upside down, thereby ensuring the accuracy of battery installation.

[0021] In some embodiments, the positive electrode nickel sheet 31 and the negative electrode nickel sheet 34 are both L-shaped.

[0022] In some embodiments, the fixing assembly includes a head cover plate 1 and a bracket 4, the first through hole 9 is set on the head cover plate 1, the protective plate 3 is pressed between the head cover plate 1 and the bracket 4, the head cover plate 1 is clamped with the bracket 4, and the head cover plate 1 is connected to the steel shell 8.

[0023] The protection plate 3 is fixed by the cooperation between the head cover plate 1 and the bracket 4 , and the connection between the protection plate 3 and the steel shell 8 is completed by the connection between the head cover plate 1 and the steel shell 8 .

[0024] In some embodiments, a limiting ring is provided on the inner wall of the bracket 4, the diameter of the limiting ring is smaller than the diameter of the protective plate 3, a clamping plate 2 is provided on the head cover 1, and a clamping slot 5 is provided on the bracket 4. The protective plate 3 is fixed between the head cover 1 and the bracket 4 through the cooperation of the limiting ring and the head cover 1, and the connection between the head cover 1 and the bracket 4 is realized through the cooperation of the clamping plate 2 and the clamping slot 5.

[0025] During the assembly of the head cover 1, the card plate 2 is inserted into the card slot 5 to realize the connection between the head cover 1 and the bracket 4. At this time, the two ends of the protective plate 3 are respectively in contact with the head cover 1 and the limiting ring. Through the cooperation between the head cover 1 and the limiting ring, the movement of the protective plate 3 is limited to ensure the fixing effect of the protective plate 3, thereby ensuring the quality of the battery.

[0026] In some embodiments, a connecting plate 10 is provided on the head cover 1 , a groove 11 is provided on the side wall of the bracket 4 , and the connecting plate 10 passes through the groove 11 and abuts against the inner wall of the steel shell 8 .

[0027] During the assembly of the head cover 1, the card plate 2 is inserted into the card slot 5. At the same time, the connecting plate 10 passes through the groove 11 and enters the steel shell 8, and is squeezed against the inner wall of the steel shell 8 to achieve the connection between the steel shell 8 and the head cover 1.

[0028] In some embodiments, the negative electrode tab 12 extends from the end of the soft-pack battery cell 7 away from the opening of the steel shell 8 to the end close to the groove 11, and the negative electrode nickel sheet 34 extends from the B-port to the end close to the groove 11. The welding point between the negative electrode nickel sheet 34 and the negative electrode tab 12 is located in the groove 11. The connecting plate 10 is squeezed by the restraining force of the steel shell 8 on the connecting plate 10.

[0029] In some embodiments, the positive electrode tab 6 extends from one end of the soft-pack battery cell 7 to the end close to the groove 11, and the positive electrode nickel sheet 31 extends from the B+ port to the end close to the groove 11. The welding point between the positive electrode nickel sheet 31 and the positive electrode tab 6 is located in the groove 11. The connecting plate 10 is squeezed by the restraining force of the steel shell 8 on the connecting plate 10.

[0030] During the battery assembly process, the positive nickel sheet 31 and the negative nickel sheet 34 are welded to the B+ port and B- port of the protective plate respectively, and the soft-pack battery cell 7, the bracket 4 and the protective plate 3 are placed in the steel shell 8 in sequence. After welding the negative electrode tab 12 to the negative nickel sheet 34 and the positive electrode tab 6 to the positive nickel sheet 31, the head cover 1 is installed. The connecting plate 10 on the head cover 1 passes through the groove 11 on the bracket 4 and enters the steel shell 8, and is squeezed against the inner wall of the steel shell 8. The connecting plate 10 is tightly attached to the tab and the nickel sheet under pressure, thereby strengthening the connection effect between the tab and the nickel sheet and ensuring the quality of the battery.

[0031] In some embodiments, a guide groove 13 is provided on the steel shell 8 , and a guide rail 14 is provided on the outer wall of the head cover 1 , and the guide rail 14 slides in the guide groove 13 .

[0032] The cooperation between the guide groove 13 and the guide rail 14 can avoid relative rotation between the steel shell 8 and the head cover 1, thereby preventing the soft-pack battery cell 7 and the protection plate 3 from rotating inside the steel shell 8, ensuring the connection effect between the soft-pack battery cell 7 and the protection plate 3 and the steel shell 8, thereby ensuring the quality of the battery.

[0033] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Reference can be made to the common and similar parts between the various embodiments. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the method description.

[0034] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A steel-shell cylindrical battery with magnetic attraction, characterized in that: include: A steel shell, wherein a battery cell is disposed in the steel shell, the steel shell has a battery cell accommodating cavity, and one end of the steel shell is provided with an opening communicating with the battery cell accommodating cavity; A protection plate, wherein the protection plate is provided with a B+ port, a B- port, a P+ port, and a P- port, the B+ port of the protection plate is connected to the positive electrode tab of the battery cell via a positive electrode nickel sheet, and the B- port of the protection plate is connected to the negative electrode tab of the battery cell via a negative electrode nickel sheet; A fixing component, wherein the fixing component is provided with two first through holes, the protective plate is arranged inside the fixing component, the positions of the two first through holes respectively correspond to the positions of the P+ port and the P- port of the protective plate, and the P+ port and the P- port are provided with magnetic contact plates with opposite polarities, and one end of the fixing component extends from the opening into the battery cell accommodating cavity and is fixedly connected to the steel shell.

2. The steel-shell cylindrical battery with magnetic attraction according to claim 1, characterized in that: The positive electrode nickel sheet and the negative electrode nickel sheet are both L-shaped.

3. The steel-shell cylindrical battery with magnetic attraction according to claim 1, characterized in that: The fixing assembly includes a head cover and a bracket, the first through hole is provided on the head cover, the protection plate is pressed between the head cover and the bracket, the head cover is clamped with the bracket, and the head cover is connected to the steel shell.

4. The steel-shell cylindrical battery with magnetic attraction according to claim 3, characterized in that: A limiting ring is provided on the inner wall of the bracket, and the diameter of the limiting ring is smaller than the diameter of the protective plate. A clamping plate is provided on the head cover, and a clamping slot is provided on the bracket. The protective plate is fixed between the head cover and the bracket through the cooperation of the limiting ring and the head cover, and the connection between the head cover and the bracket is achieved through the cooperation of the clamping plate and the clamping slot.

5. The steel-shell cylindrical battery with magnetic attraction according to claim 3, characterized in that: A connecting plate is provided on the head cover plate, a groove is provided on the side wall of the bracket, and the connecting plate passes through the groove and abuts against the inner wall of the steel shell.

6. The steel-shell cylindrical battery with magnetic attraction according to claim 5, characterized in that: The negative electrode tab extends from the end of the battery cell away from the opening of the steel shell to the end close to the groove, and the negative electrode nickel sheet extends from the B-port to the end close to the groove. The welding point between the negative electrode nickel sheet and the negative electrode tab is located in the groove. The restraining force of the steel shell on the connecting plate causes the connecting plate to squeeze the negative electrode nickel sheet and the negative electrode tab.

7. The steel-shell cylindrical battery with magnetic attraction according to claim 3, characterized in that: A guide groove is provided on the steel shell, and a guide rail is provided on the outer wall of the head cover plate. The guide rail slides in the guide groove.

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