A wound lithium-ion battery with flame retardant effect

Abstract

The present invention discloses a wound-type lithium-ion battery with flame retardancy, relating to the technical field of wound-type lithium-ion batteries. The invention addresses the problem of existing lithium-ion batteries requiring internal injection of electrolyte, which is generally composed of a carbonate solvent and an electrolyte and has certain toxicity, thus causing safety issues during use. A first sleeve is installed at the bottom of the battery housing and is pluggably connected to the battery housing. A second sleeve is installed at the top of the battery housing and is pluggably connected to the top of the battery housing. A battery winding core is disposed within the battery housing. A positive terminal is disposed on the upper surface of the battery housing, and a negative terminal is disposed on the lower surface of the battery housing. A fixing sleeve is mounted on the battery housing. A top gasket is disposed around the positive terminal, a top cover is disposed below the top gasket, and a first insulating pad is disposed below the top cover.

Description

Technical Field

[0001] The invention relates to the technical field of wound lithium-ion batteries, in particular to a wound lithium-ion battery with flame retardant effect. Background Art

[0002] Lithium batteries are categorized as lithium batteries and lithium-ion batteries. Lithium-ion batteries, commonly referred to as lithium batteries, are used in mobile phones and laptops. Batteries generally use materials containing lithium as electrodes and are the epitome of modern high-performance batteries. However, true lithium batteries are rarely used in everyday electronic products due to their high risk. Lithium-ion batteries are secondary batteries (rechargeable batteries) that primarily rely on the movement of lithium ions between a positive and negative electrode. During the charge and discharge process, lithium ions (Li+) are intercalated and deintercalated between the two electrodes. During charging, Li+ is deintercalated from the positive electrode and then intercalated into the negative electrode through the electrolyte, leaving the negative electrode in a lithium-rich state. The reverse occurs during discharge.

[0003] Existing lithium-ion batteries need to be injected with electrolyte, which is generally composed of carbonate solvents and electrolytes and has certain toxicity, thus causing safety issues when using lithium batteries. Therefore, it does not meet existing needs. In this regard, we propose a wound lithium-ion battery with flame retardant effect. Summary of the Invention

[0004] The object of the present invention is to provide a wound lithium-ion battery with flame retardant effect, so as to solve the problem proposed in the above background technology that the existing lithium-ion battery needs to be injected with electrolyte, and the electrolyte generally consists of carbonate solvent and electrolyte, which has certain toxicity, thereby causing safety problems when the lithium battery is used.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a wound lithium-ion battery with a flame retardant effect, comprising a battery housing and a battery core, wherein a first sleeve is installed at the bottom of the battery housing and is plug-connected to the battery housing, a second sleeve is installed at the top of the battery housing and is plug-connected to the top of the battery housing, a battery core is arranged inside the battery housing, a positive terminal is arranged on the upper surface of the battery housing, a negative terminal is arranged on the lower surface of the battery housing, and a fixing sleeve is installed on the battery housing.

[0006] Preferably, a top gasket is provided around the positive terminal, a top cover is provided below the top gasket, a first insulating pad is provided below the top cover, an insulating sealing ring is provided below the first insulating pad, and a support seat is provided around the negative terminal.

[0007] Preferably, a glass sealing ball is installed inside the positive terminal, a glass closing ball is installed inside the negative terminal, a second insulating pad is provided at the bottom end of the battery shell, a coating film is installed on the surface of the battery core, and a current collecting rod is provided inside the battery core.

[0008] Preferably, a positive pole is provided at the bottom of the glass sealing ball, and the positive pole extends to the upper surface of the current collecting rod, and a negative pole is provided at the top of the glass sealing ball, and the negative pole extends to the lower surface of the current collecting rod.

[0009] Preferably, electrode sheets are installed around the current collecting rod, and there are several electrode sheets. A positive electrode sheet is arranged inside the electrode sheet, a separator is arranged below the positive electrode sheet, and a negative electrode sheet is arranged below the separator, and there are several positive electrode sheets, separators and negative electrode sheets.

[0010] Preferably, a wrapping opening is provided inside the fixing sleeve, and the fixing sleeve is plug-connected to the battery housing through the wrapping opening.

[0011] Preferably, a fixing buckle is provided on the seam of the fixing sleeve, and two fixing buckles are installed, and a clamping strip is provided on both sides of the fixing buckle, and two clamping strips are provided.

[0012] Preferably, a limit seat is installed at the bottom of the battery roll core, and the limit seat is plug-connected to the bottom of the battery roll core.

[0013] Preferably, a fastening ring is installed on the battery roll core, and two fastening rings are installed. The fastening ring is plugged into the battery roll core, and a fixing plate is provided at the bottom of the limit seat. Two fixing screws are installed on the fixing plate, and the fixing plate is connected to the internal thread of the battery shell through the fixing screws.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The present invention provides a current collecting rod inside the battery coil, electrode sheets are arranged around the current collecting rod, and positive electrode sheets, separators and negative electrode sheets are arranged inside the electrode sheets. The upper and lower ends of the current collecting rod are connected to the positive electrode posts and the negative electrode posts, so as to form a wound lithium-ion battery. The positive electrode sheets, separators and negative electrode sheets inside the battery coil are fixed to the current collecting rod by winding the sheets together, making the structure more solid during use and having strong anti-extrusion function.

[0016] 2. By setting a covering film on the outer surface of the battery roll core, the covering film is a hot-melt adhesive film. The hot-melt adhesive film is a kind of adhesive film with release paper. When in use, it can be directly pasted on the wound battery roll core, which is convenient for the installation, fixation and replacement of the covering film. It also has certain flame retardant properties, which can avoid accidental combustion of the battery roll core and improve its safety performance. Two fastening rings are also installed on the surface of the covering film. The fastening rings are directly plugged into its surface, which can play a certain fastening role on the battery roll core, ensure the connection strength of the electrode sheets inside the battery roll core, and avoid the phenomenon of poor conductivity.

[0017] 3. By setting a limit seat at the bottom of the battery reel core, before installing the battery reel core, first fix the limit seat to the bottom end of the battery shell through the fixing screws on the fixing plate, and then insert the battery reel core into the limit seat, thereby ensuring the stability of the battery reel core inside the battery shell. At the same time, a first insulating pad and an insulating pad are respectively provided on the upper and lower surfaces of the battery shell to ensure that the battery shell is in an insulated state during use. A fixing sleeve is also installed on the surface of the battery shell, and a snap strip is installed on the fixing sleeve. When it is installed inside the shell, the snap strip can be used to limit and fix it, which is convenient for loading and unloading. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the overall structure of the wound lithium-ion battery of the present invention;

[0019] Figure 2 Schematic diagram of the internal cross-sectional structure of the wound lithium-ion battery of the present invention;

[0020] Figure 3 This is an enlarged schematic diagram of the internal structure of the battery coil core of the present invention;

[0021] Figure 4 This is a schematic diagram of the battery coil core installation and fixing structure of the present invention;

[0022] Figure 5 This is a schematic structural diagram of the rear end face of the fixing sleeve of the present invention;

[0023] In the figure: 1. Battery casing; 2. First sleeve; 3. Second sleeve; 4. Fixing sleeve; 5. Positive terminal; 6. Top gasket; 7. Support seat; 8. Negative terminal; 9. Top cover; 10. First insulating pad; 11. Insulating sealing ring; 12. Battery roll core; 13. Coating film; 14. Electrode sheet; 15. Current collecting rod; 16. Glass sealing ball; 17. Glass closing ball; 18. Positive pole; 19. Negative pole; 20. Positive pole; 21. Interval film; 22. Negative pole; 23. Limiting seat; 24. Fixing plate; 25. Fixing screw; 26. Fastening ring; 27. Second insulating pad; 28. Wrapping mouth; 29. ​​Fixing buckle; 30. Snap strip. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0025] See also Figure 1-5 The present invention provides an embodiment of a wound lithium-ion battery with a flame retardant effect, comprising a battery housing 1 and a battery core 12. A first sleeve 2 is installed at the bottom of the battery housing 1, and the first sleeve 2 is plugged into the battery housing 1. A second sleeve 3 is installed at the top of the battery housing 1, and the second sleeve 3 is plugged into the top of the battery housing 1. The battery core 12 is arranged inside the battery housing 1, a positive terminal 5 is provided on the upper surface of the battery housing 1, a negative terminal 8 is provided on the lower surface of the battery housing 1, and a fixing sleeve 4 is installed on the battery housing 1.

[0026] Furthermore, a top gasket 6 is provided around the positive terminal 5, a top cover 9 is provided below the top gasket 6, a first insulating pad 10 is provided below the top cover 9, an insulating sealing ring 11 is provided below the first insulating pad 10, and a support seat 7 is provided around the negative terminal 8. The first insulating pad 10 and the second insulating pad 27 are respectively provided on the upper and lower surfaces of the battery casing 1, thereby ensuring that the battery casing 1 is in an insulating state during use.

[0027] Furthermore, a glass sealing ball 16 is installed inside the positive terminal 5, a glass closing ball 17 is installed inside the negative terminal 8, a second insulating pad 27 is provided at the bottom end of the battery casing 1, a coating film 13 is installed on the surface of the battery core 12, and a current collecting rod 15 is provided inside the battery core 12, so that the lithium-ion battery formed by winding, the coating film 13 is a hot melt adhesive film, and the hot melt adhesive film is a kind of adhesive film with release paper. When in use, it can be directly pasted on the wound battery core 12, which is convenient for the installation, fixation and replacement of the coating film 13, and it has certain flame retardant properties, which can avoid accidental combustion of the battery core 12 and improve its safety performance.

[0028] Furthermore, a positive electrode post 18 is provided at the bottom of the glass sealing ball 16, and the positive electrode post 18 extends to the upper surface of the current collecting rod 15. A negative electrode post 19 is provided at the top of the glass closing ball 17, and the negative electrode post 19 extends to the lower surface of the current collecting rod 15. When in use, the upper and lower ends of the current collecting rod 15 are connected to the positive electrode post 18 and the negative electrode post 19.

[0029] Furthermore, electrode sheets 14 are installed around the current collecting rod 15, and there are several electrode sheets 14. A positive electrode sheet 20 is arranged inside the electrode sheet 14, and a separator 21 is arranged below the positive electrode sheet 20. A negative electrode sheet 22 is arranged below the separator 21, and there are several positive electrode sheets 20, separators 21 and negative electrode sheets 22.

[0030] Furthermore, a wrapping opening 28 is provided inside the fixing sleeve 4 , and the fixing sleeve 4 is plug-connected to the battery housing 1 through the wrapping opening 28 , so that the fixing sleeve 4 can be conveniently installed on the battery housing 1 and fixed simultaneously.

[0031] Furthermore, a fixing buckle 29 is provided on the seam of the fixing sleeve 4, and two fixing buckles 29 are installed. A snap-fit ​​strip 30 is provided on both sides of the fixing buckle 29, and two snap-fit ​​strips 30 are provided. When it is installed inside the shell, the snap-fit ​​strip 30 can be used to limit and fix it, which is convenient for loading and unloading.

[0032] Furthermore, a limit seat 23 is installed at the bottom of the battery roll core 12, and the limit seat 23 is plugged into the bottom of the battery roll core 12. When in use, the limit seat 23 is first fixed to the bottom end of the battery shell 1 through the fixing screws 25 on the fixing plate 24, and then the battery roll core 12 is plugged into the limit seat 23, thereby ensuring the stability of the battery roll core 12 inside the battery shell 1.

[0033] Furthermore, a fastening ring 26 is installed on the battery core 12, and two fastening rings 26 are installed. The fastening rings 26 are plugged into the battery core 12, and a fixing plate 24 is provided at the bottom of the limit seat 23. A fixing screw 25 is installed on the fixing plate 24, and two fixing screws 25 are installed. The fixing plate 24 is connected to the internal thread of the battery shell 1 through the fixing screw 25, and the fastening ring 26 is directly plugged into its surface, which can play a certain fastening role on the battery core 12, ensure the connection strength of the electrode sheet 14 inside the battery core 12, and avoid the phenomenon of poor conductivity during use.

[0034] Working principle: When in use, first fix the limiting seat 23 to the bottom end of the battery shell 1 through the fixing screws 25 on the fixing plate 24, and then plug the battery core 12 into the limiting seat 23, which ensures the stability of the battery core 12 inside the battery shell 1. At the same time, the first insulating pad 10 and the second insulating pad 27 are respectively provided on the upper and lower surfaces of the battery shell 1 to ensure that the battery shell 1 is insulated when in use. A fixing sleeve 4 is also installed on the surface of the battery shell 1, and a clamping strip 30 is installed on the fixing sleeve 4. When it is installed inside the shell, the clamping strip 30 can be used to limit and fix it, which is convenient for loading and unloading. When in use, a current collecting rod 15 is provided inside the battery core 12, and electrode sheets 14 are provided around the current collecting rod 15. A positive electrode sheet 20, a spacer film 21 and a negative electrode sheet 22 are provided inside the electrode sheet 14. The upper and lower ends of the current collecting rod 15 are in contact with the positive electrode column 18 and The negative electrode post 19 is connected, so that the wound lithium-ion battery solves the need to inject electrolyte into the existing lithium-ion battery. The electrolyte is generally composed of carbonate solvents and electrolytes, which has certain toxicity, thereby causing safety problems when the lithium battery is in use. The positive electrode sheet 20, the separator film 21 and the negative electrode sheet 22 inside the battery core 12 are fixed on the collecting rod 15 by stacking and winding, making its structure more solid during use and having strong anti-extrusion function. At the same time, a coating film 13 is provided on the surface outside the battery core 12. The coating film 13 is a hot-melt adhesive film. The hot-melt adhesive film is a kind of adhesive film with release paper. When in use, it can be directly pasted on the wound battery core 12, which is convenient for the installation, fixation and replacement of the coating film 13. It also has certain flame retardant properties, which can avoid accidental combustion of the battery core 12 and improve its safety performance.

[0035] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A wound lithium-ion battery with flame retardant effect, comprising a battery housing (1) and a battery winding core (12), characterized in that: A first sleeve (2) is installed at the bottom of the battery housing (1), and the first sleeve (2) is plug-connected to the battery housing (1); a second sleeve (3) is installed at the top of the battery housing (1), and the second sleeve (3) is plug-connected to the top of the battery housing (1); a battery winding core (12) is provided inside the battery housing (1); a positive terminal (5) is provided on the upper surface of the battery housing (1); a negative terminal (8) is provided on the lower surface of the battery housing (1); and a fixing sleeve (4) is installed on the battery housing (1); A glass sealing ball (16) is installed inside the positive terminal (5), a glass closing ball (17) is installed inside the negative terminal (8), a second insulating pad (27) is provided at the bottom end of the battery housing (1), a coating film (13) is installed on the surface of the battery winding core (12), and a current collecting rod (15) is provided inside the battery winding core (12); a positive pole (18) is provided at the bottom of the glass sealing ball (16), and the positive pole (18) extends to the upper surface of the current collecting rod (15), and a positive pole (18) is provided at the top of the glass closing ball (17). There is a negative pole (19), and the negative pole (19) extends to the lower surface of the current collecting rod (15); the current collecting rod (15) is equipped with electrode sheets (14) around it, and there are a plurality of electrode sheets (14); a positive pole sheet (20) is arranged inside the electrode sheet (14); a separator (21) is arranged below the positive pole sheet (20); a negative pole sheet (22) is arranged below the separator (21), and a plurality of positive pole sheets (20), separators (21) and negative pole sheets (22) are arranged; the bottom of the battery winding core (12) is equipped with a limited number of The position seat (23) is provided, and the position limiting seat (23) is plug-connected with the bottom of the battery winding core (12); a fastening ring (26) is installed on the battery winding core (12), and two fastening rings (26) are installed. The fastening ring (26) is plug-connected with the battery winding core (12); a fixing plate (24) is provided at the bottom of the position limiting seat (23); two fixing screws (25) are installed on the fixing plate (24); the fixing plate (24) is connected to the internal thread of the battery housing (1) through the fixing screws (25).

2. The wound-type lithium-ion battery with flame retardant effect according to claim 1, characterized in that: A top gasket (6) is provided around the positive terminal (5), a top cover (9) is provided below the top gasket (6), a first insulating pad (10) is provided below the top cover (9), an insulating sealing ring (11) is provided below the first insulating pad (10), and a support seat (7) is provided around the negative terminal (8).

3. The wound-type lithium-ion battery with flame retardant effect according to claim 1, characterized in that: A wrapping opening (28) is provided inside the fixing sleeve (4), and the fixing sleeve (4) is plug-connected to the battery housing (1) via the wrapping opening (28).

4. The wound-type lithium-ion battery with flame retardant effect according to claim 1, characterized in that: A fixing buckle (29) is provided on the seam of the fixing sleeve (4), and two fixing buckles (29) are installed. Both sides of the fixing buckle (29) are provided with a clamping strip (30), and two clamping strips (30) are provided.

Images