Steel shell cylindrical battery with magnetic attraction

Abstract

The utility model discloses a kind of steel shell cylindrical batteries with magnetic attraction, it is related to lithium battery technical field.It includes: steel shell, electric core is arranged in steel shell, steel shell has electric core accommodating cavity and the end of steel shell is provided with the opening communicated with electric core accommodating cavity;Protective plate, B+ port, B- port, P+ port and P- port are arranged on protective plate, the positive electrode lug of B+ port of protective plate is connected with electric core by positive electrode nickel sheet, the negative electrode lug of B- port of protective plate is connected with electric core by negative electrode nickel sheet;Fixed assembly, fixed assembly is provided with two first through holes, protective plate is arranged in fixed assembly interior, the position of two first through holes respectively with the position of P+ port and P- port of protective plate correspond, P+ port and P- port are provided with polarity opposite magnetic touch electric plate, one end of fixed assembly is inserted into electric core accommodating cavity by opening and is fixedly connected with steel shell.The utility model discloses provide steel shell cylindrical battery with magnetic attraction, the positive electrode and negative electrode of battery are arranged in one end, by the polarity of magnetic touch electric plate different, avoid battery reverse installation.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery technology, and more specifically to a cylindrical steel-cased battery with magnetic attraction. Background Technology

[0002] With the rapid development of portable electronic devices, lithium-ion batteries have become the mainstream choice in various application fields due to their advantages such as high energy density, long cycle life, and environmental friendliness. Among the many forms of lithium-ion batteries, cylindrical batteries have been widely favored due to their simple structure, low manufacturing cost, and high energy density.

[0003] However, existing cylindrical pouch cells cannot be easily assembled and have the following problems during use: inconvenient connection: the positive and negative terminals are distributed at both ends of the battery, and the device connection requires a specific interface design, which increases the complexity of the design; risk of reverse installation: the positive and negative terminals 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 pouch cell is lightweight, its mechanical strength is low and it is easily damaged by external forces; external protection circuit: it increases the design complexity of the battery and is easily affected by the external environment. Utility Model Content

[0004] In view of this, the present invention provides a cylindrical steel-cased battery with magnetic attraction, which guides the positive and negative terminals of the battery to one end and distinguishes the positive and negative terminals through a magnetic contact plate, ensuring the accuracy of the connection between the battery and external electrical appliances and avoiding the risk of reverse installation. To achieve the above objectives, the present invention adopts the following technical solution:

[0005] This utility model provides a magnetically attached steel-cased cylindrical battery, comprising:

[0006] A steel shell, wherein a battery cell is disposed inside the steel shell, the steel shell has a battery cell receiving cavity and one end of the steel shell is provided with an opening communicating with the battery cell receiving cavity;

[0007] A protection board is provided with a B+ port, a B- port, a P+ port and a P- port. The B+ port of the protection board is connected to the positive electrode tab of the battery cell through a positive nickel plate, and the B- port of the protection board is connected to the negative electrode tab of the battery cell through a negative nickel plate.

[0008] The fixing component has two first through holes. The protective plate is disposed inside the fixing component. The positions of the two first through holes correspond to the positions of the P+ port and the P- port of the protective plate, respectively. Magnetic contact plates with opposite polarities are provided at the P+ port and the P- port. One end of the fixing component extends into the cell receiving cavity through the opening and is fixedly connected to the steel shell.

[0009] Furthermore, both the positive and negative nickel plates are L-shaped.

[0010] Furthermore, the fixing assembly includes a head cover and a bracket, the first through hole is disposed on the head cover, the protective plate is pressed between the head cover and the bracket, the head cover is snapped into the bracket, and the head cover is connected to the steel shell.

[0011] Furthermore, a limiting ring is provided on the inner wall of the bracket, the diameter of which is smaller than the diameter of the protective plate. A retaining plate is provided on the head cover, and a retaining groove is provided on the bracket. The protective plate is fixed between the head cover and the bracket by the cooperation of the limiting ring and the head cover. The connection between the head cover and the bracket is achieved by the cooperation of the retaining plate and the retaining groove.

[0012] Furthermore, a connecting plate is provided on the head cover, and a groove is provided on the side wall of the bracket. The connecting plate passes through the groove and abuts against the inner wall of the steel shell.

[0013] Furthermore, the negative electrode tab extends from the end of the cell away from the opening of the steel shell towards the end closer to the groove, and the negative electrode nickel sheet extends from the B-port towards the end closer to the groove. The welding point of the negative electrode nickel sheet and the negative electrode tab is located in the groove. Through the constraint force of the steel shell on the connecting plate, the connecting plate squeezes the negative electrode nickel sheet and the negative electrode tab.

[0014] Furthermore, the steel shell is provided with a guide groove, and the outer wall of the head cover is provided with a guide rail, which slides within the guide groove.

[0015] As can be seen from the above technical solution, compared with the prior art, this utility model discloses a cylindrical steel-cased battery with magnetic attraction. The steel casing increases the rigidity of the battery, and the positive and negative terminals of the battery are set at one end. The positive and negative terminals of the battery are distinguished by the different polarities of the magnetic contact plate, which avoids reverse installation of the battery and ensures the accuracy of the battery connection. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0017] Figure 1 A schematic diagram of the structure of the magnetically attached steel-cased cylindrical battery provided by this utility model;

[0018] Figure 2 Exploded view of the magnetically attached steel-cased cylindrical battery provided by this utility model;

[0019] Figure 3 A schematic diagram of the structure of the protective plate provided by this utility model.

[0020] In the diagram: 1. Head cover plate; 2. Card plate; 3. Protective 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 electrode tab; 7. Soft-pack battery cell; 8. Steel shell; 9. First through hole; 10. Connecting plate; 11. Groove; 12. Negative electrode tab; 13. Guide groove; 14. Guide rail. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] See Figure 1-3 This utility model discloses a steel-cased cylindrical battery with magnetic attraction, comprising:

[0023] A steel shell 8, a battery cell is installed inside the steel shell 8, the steel shell 8 has a battery cell receiving cavity and one end of the steel shell 8 is provided with an opening communicating with the battery cell receiving cavity;

[0024] 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 a positive nickel plate 31. The B- port of the protection board 3 is connected to the negative electrode tab 12 of the battery cell through a negative nickel plate 34.

[0025] The fixing component has two first through holes 9. The protection plate 3 is located inside the fixing component. The positions of the two first through holes 9 correspond to the positions of the P+ port and P- port of the protection plate 3, respectively. Magnetic contact plates with opposite polarities are provided at the P+ port and P- port. One end of the fixing component extends into the cell receiving cavity through the opening and is fixedly connected to the steel shell 8.

[0026] In some embodiments, the battery cell is a pouch cell 7.

[0027] The soft-pack battery cell 7 is placed inside the steel shell 8, which increases the strength of the battery. The protection board 3 and the soft-pack battery cell 7 are fixed inside the steel shell 8 by the fixing component.

[0028] The protection board 3 enables the charging and discharging of the soft-pack battery cell 7, while also providing short-circuit protection for the soft-pack battery cell 7.

[0029] By connecting the protection plate 3 to the positive electrode tab 6 and the negative electrode tab 12 respectively, the positive and negative electrodes of the battery are located at the same end of the battery. The N electrode contact plate 32 and the S electrode contact plate 33 are respectively provided at the P+ port and the P- port to facilitate the differentiation of the positive and negative electrodes of the battery. In the battery slot where the battery is placed, there are S plates and N plates that cooperate with the N electrode contact plate 32 and the S electrode contact plate 33 respectively.

[0030] During battery installation, 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 backwards, ensuring the accuracy of battery installation.

[0031] In some embodiments, both the positive nickel plate 31 and the negative nickel plate 34 are L-shaped.

[0032] In some embodiments, the fixing component includes a head cover plate 1 and a bracket 4, a first through hole 9 is provided on the head cover plate 1, a protective plate 3 is pressed between the head cover plate 1 and the bracket 4, the head cover plate 1 and the bracket 4 are snapped together, and the head cover plate 1 is connected to the steel shell 8.

[0033] The protective plate 3 is fixed by the cooperation of the head cover plate 1 and the bracket 4, and the connection between the protective plate 3 and the steel shell 8 is completed by the connection between the head cover plate 1 and the steel shell 8.

[0034] 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 retaining plate 2 is provided on the head cover 1, and a retaining groove 5 is provided on the bracket 4. The protective plate 3 is fixed between the head cover 1 and the bracket 4 by the cooperation of the limiting ring and the head cover 1. The connection between the head cover 1 and the bracket 4 is realized by the cooperation of the retaining plate 2 and the retaining groove 5.

[0035] During the assembly of the head cover 1, the clip 2 is inserted into the slot 5 to connect the head cover 1 with the bracket 4. At this time, the two ends of the protection plate 3 are in contact with the head cover 1 and the limiting ring respectively. Through the cooperation of the head cover 1 and the limiting ring, the movement of the protection plate 3 is restricted, ensuring the fixing effect of the protection plate 3, thereby ensuring the quality of the battery.

[0036] In some embodiments, a connecting plate 10 is provided on the head cover 1, and a groove 11 is provided on the side wall of the bracket 4. The connecting plate 10 passes through the groove 11 and abuts against the inner wall of the steel shell 8.

[0037] During the assembly of the head cover 1, the clamping plate 2 is inserted into the clamping groove 5. At the same time, the connecting plate 10 passes through the groove 11 and enters the steel shell 8, pressing against the inner wall of the steel shell 8 to achieve the connection between the steel shell 8 and the head cover 1.

[0038] In some embodiments, the negative electrode tab 12 extends from the end of the soft-pack cell 7 away from the opening of the steel shell 8 toward the end near the groove 11, and the negative electrode nickel sheet 34 extends from the B-port toward the end near the groove 11. The welding point between the negative electrode nickel sheet 34 and the negative electrode tab 12 is located inside the groove 11. The connecting plate 10 is pressed by the constraint force of the steel shell 8 on the connecting plate 10.

[0039] In some embodiments, the positive electrode tab 6 extends from one end of the pouch cell 7 toward the end near the groove 11, and the positive electrode nickel sheet 31 extends from the B+ port toward the end near the groove 11. The welding point between the positive electrode nickel sheet 31 and the positive electrode tab 6 is located inside the groove 11. The connecting plate 10 is pressed by the constraint force of the steel shell 8 on the connecting plate 10.

[0040] During battery assembly, the positive nickel sheet 31 and the negative nickel sheet 34 are welded to the B+ and B- ports of the protection board, respectively. The soft-pack cell 7, the bracket 4, and the protection board 3 are then placed into 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, pressing against the inner wall of the steel shell 8. Under pressure, the connecting plate 10 is tightly attached to the tab and the nickel sheet, strengthening the connection between the tab and the nickel sheet and ensuring the quality of the battery.

[0041] 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 plate 1, and the guide rail 14 slides in the guide groove 13.

[0042] By cooperating with the guide groove 13 and the guide rail 14, relative rotation between the steel shell 8 and the head cover 1 is avoided, 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, and thus ensuring the quality of the battery.

[0043] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0044] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those 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 to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

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

2. The magnetically attached cylindrical steel-cased battery according to claim 1, characterized in that, Both the positive and negative nickel plates are L-shaped.

3. The magnetically attached cylindrical steel-cased battery 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 protective plate is pressed between the head cover and the bracket. The head cover is snapped into the bracket. The head cover is connected to the steel shell.

4. The magnetically attached cylindrical steel-cased battery according to claim 3, characterized in that, A limiting ring is provided on the inner wall of the bracket, the diameter of which is smaller than the diameter of the protective plate. A retaining plate is provided on the head cover, and a retaining groove is provided on the bracket. The protective plate is fixed between the head cover and the bracket by the cooperation of the limiting ring and the head cover. The connection between the head cover and the bracket is achieved by the cooperation of the retaining plate and the retaining groove.

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

6. The magnetically attached cylindrical steel-cased battery according to claim 5, characterized in that, The negative electrode tab extends from the end of the cell away from the opening of the steel shell towards the end closer to the groove. The negative electrode nickel sheet extends from the B-port towards the end closer to the groove. The welding point of the negative electrode nickel sheet and the negative electrode tab is located in the groove. The connecting plate is pressed by the constraint force of the steel shell on the connecting plate.

7. The magnetically attracted steel-cased cylindrical battery according to claim 3, characterized in that, The steel shell is provided with a guide groove, and the outer wall of the head cover is provided with a guide rail, which slides within the guide groove.

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